/* ═══════════════════════════════════════════════════════════════════════
   RiseOJ — Design System v4
   Font: Inter + JetBrains Mono · Palette: Slate + Indigo
   ═══════════════════════════════════════════════════════════════════════ */

/* ── 1. Tokens ─────────────────────────────────────────────────────── */
:root {
  color-scheme: light;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  --bg:         #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle:  #f1f5f9;
  --bg-muted:   #e2e8f0;
  --bg-sunken:  #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-overlay: rgba(255,255,255,0.92);

  --text:       #0f172a;
  --text-2:     #334155;
  --text-muted: #64748b;
  --text-faint: #94a3b8;

  --border:       #e2e8f0;
  --border-strong: #cbd5e1;
  --border-subtle: #f1f5f9;

  --accent:        #4f46e5;
  --accent-hover:  #4338ca;
  --accent-strong: #3730a3;
  --accent-text:   #4f46e5;
  --accent-soft:   rgba(79,70,229,0.08);
  --accent-2:      #06b6d4;

  --success:      #059669;
  --success-soft: rgba(5,150,105,0.08);
  --danger:       #dc2626;
  --danger-soft:  rgba(220,38,38,0.06);
  --warning:      #d97706;
  --warning-soft: rgba(217,119,6,0.06);
  --info:         #2563eb;
  --info-soft:    rgba(37,99,235,0.06);
  --orange:       #ea580c;
  --orange-soft:  rgba(234,88,12,0.06);
  --yellow:       #ca8a04;

  --shadow-xs:  0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm:  0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md:  0 4px 12px rgba(15,23,42,0.08);
  --shadow-lg:  0 12px 40px rgba(15,23,42,0.10);
  --shadow-ring: 0 0 0 3px rgba(79,70,229,0.15);

  --r-xs: 6px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-full: 9999px;

  --ease: cubic-bezier(.22,1,.36,1);
  --dur: 180ms;
}

/* ── Dark ──────────────────────────────────────────────────────────── */
:root[data-theme="dark"], body[data-theme="dark"] {
  color-scheme: dark;
  --bg:          #0c0f17;
  --bg-surface:  #151921;
  --bg-subtle:   #1a1f2b;
  --bg-muted:    #232936;
  --bg-sunken:   #0f1219;
  --bg-elevated: #1a1f2b;
  --bg-overlay:  rgba(12,15,23,0.92);

  --text:       #f1f5f9;
  --text-2:     #cbd5e1;
  --text-muted: #94a3b8;
  --text-faint: #64748b;

  --border:       #232936;
  --border-strong: #334155;
  --border-subtle: #1a1f2b;

  --accent:        #818cf8;
  --accent-hover:  #a5b4fc;
  --accent-strong: #6366f1;
  --accent-text:   #a5b4fc;
  --accent-soft:   rgba(129,140,248,0.10);
  --accent-2:      #22d3ee;

  --success:     #34d399; --success-soft: rgba(52,211,153,0.10);
  --danger:      #f87171; --danger-soft:  rgba(248,113,113,0.08);
  --warning:     #fbbf24; --warning-soft: rgba(251,191,36,0.08);
  --info:        #60a5fa; --info-soft:    rgba(96,165,250,0.08);
  --orange:      #fb923c; --orange-soft:  rgba(251,146,60,0.08);
  --yellow:      #facc15;

  --shadow-xs:  0 1px 2px rgba(0,0,0,0.25);
  --shadow-sm:  0 2px 4px rgba(0,0,0,0.30);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.40);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg:#0c0f17;--bg-surface:#151921;--bg-subtle:#1a1f2b;--bg-muted:#232936;--bg-sunken:#0f1219;--bg-elevated:#1a1f2b;--bg-overlay:rgba(12,15,23,0.92);
    --text:#f1f5f9;--text-2:#cbd5e1;--text-muted:#94a3b8;--text-faint:#64748b;
    --border:#232936;--border-strong:#334155;--border-subtle:#1a1f2b;
    --accent:#818cf8;--accent-hover:#a5b4fc;--accent-strong:#6366f1;--accent-text:#a5b4fc;--accent-soft:rgba(129,140,248,0.10);--accent-2:#22d3ee;
    --success:#34d399;--success-soft:rgba(52,211,153,0.10);--danger:#f87171;--danger-soft:rgba(248,113,113,0.08);--warning:#fbbf24;--warning-soft:rgba(251,191,36,0.08);--info:#60a5fa;--info-soft:rgba(96,165,250,0.08);--orange:#fb923c;--orange-soft:rgba(251,146,60,0.08);--yellow:#facc15;
    --shadow-xs:0 1px 2px rgba(0,0,0,0.25);--shadow-sm:0 2px 4px rgba(0,0,0,0.30);--shadow-md:0 4px 16px rgba(0,0,0,0.35);--shadow-lg:0 12px 40px rgba(0,0,0,0.40);
  }
}

/* ── 2. Reset & base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); color: var(--text); }
body { margin: 0; font-family: var(--font-sans); background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; line-height: 1.6; min-height: 100vh; }
a { color: var(--accent-text); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
::selection { background: var(--accent-soft); color: var(--text); }

/* ── 3. Layout ─────────────────────────────────────────────────────── */
.page-wrap { max-width: 1100px; margin: 0 auto; padding: 5.5rem 1.5rem 3rem; }
@media (max-width: 768px) { .page-wrap { padding: 4.5rem 1rem 2rem; } }

/* ── 4. Cards ──────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { box-shadow: var(--shadow-sm); border-color: var(--border-strong); }
.card-body { padding: 1.5rem 1.75rem; }
@media (max-width: 768px) { .card-body { padding: 1.15rem 1.25rem; } }

/* ── 5. Typography ─────────────────────────────────────────────────── */
.h1 { font-size: 1.75rem; font-weight: 800; color: var(--text); letter-spacing: -0.03em; line-height: 1.2; margin: 0; }
.h2 { font-size: 1.1rem; font-weight: 700; color: var(--text); margin: 0 0 0.6rem; }
.h3 { font-size: 0.9rem; font-weight: 600; color: var(--text); margin: 0 0 0.5rem; }
.subtitle { font-size: 0.95rem; color: var(--text-muted); margin: 0.35rem 0 0; line-height: 1.6; }
.label { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); }
.mono { font-family: var(--font-mono); }

/* ── 6. Section heading ────────────────────────────────────────────── */
.sh {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.95rem; font-weight: 700; color: var(--text);
  margin: 0 0 0.85rem; padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
}
.sh::before {
  content: ''; width: 3px; height: 1.1em; border-radius: 2px;
  background: var(--accent); flex-shrink: 0;
}

/* ── 7. Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  font-weight: 600; font-size: 0.85rem; padding: 0.5rem 1.1rem;
  border-radius: var(--r-sm); border: 1px solid var(--border);
  background: var(--bg-surface); color: var(--text-2);
  cursor: pointer; text-decoration: none;
  transition: all var(--dur) var(--ease);
  white-space: nowrap; user-select: none;
}
.btn:hover { border-color: var(--border-strong); background: var(--bg-subtle); color: var(--text); transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; box-shadow: 0 4px 14px var(--accent-soft); transform: translateY(-1px); }
.btn-danger { color: var(--danger); border-color: currentColor; background: transparent; }
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: var(--bg-subtle); color: var(--text); }
.btn-lg { padding: 0.65rem 1.5rem; font-size: 0.95rem; border-radius: var(--r-md); }
.btn-block { width: 100%; }

/* ── 8. Forms ──────────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field-label { font-size: 0.82rem; font-weight: 600; color: var(--text-muted); }
.input {
  background: var(--bg-surface); border: 1px solid var(--border); color: var(--text);
  padding: 0.6rem 0.85rem; font-size: 0.875rem; border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  outline: none; width: 100%;
}
.input:focus { border-color: var(--accent); box-shadow: var(--shadow-ring); }
.input::placeholder { color: var(--text-faint); }
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M1.5 3.5l3.5 3.5 3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2rem;
}

/* ── 9. Tables ─────────────────────────────────────────────────────── */
.tbl-wrap { overflow-x: auto; border-radius: var(--r-md); }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th, td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
th { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); background: var(--bg-subtle); }
tbody tr { transition: background var(--dur) var(--ease); }
tbody tr:hover { background: var(--accent-soft); }
tbody tr:last-child td { border-bottom: none; }

/* ── 10. Badges ────────────────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; padding: 0.2rem 0.55rem; border-radius: var(--r-full); font-size: 0.7rem; font-weight: 700; white-space: nowrap; }
.badge-ok { background: var(--success-soft); color: var(--success); }
.badge-err { background: var(--danger-soft); color: var(--danger); }
.badge-warn { background: var(--warning-soft); color: var(--warning); }
.badge-info { background: var(--info-soft); color: var(--info); }
.badge-muted { background: var(--bg-muted); color: var(--text-muted); }
.badge-accent { background: var(--accent-soft); color: var(--accent); }

/* ── 11. Verdict classes ───────────────────────────────────────────── */
.result-accepted { color: var(--success); font-weight: 700; }
.result-wrong-answer { color: var(--danger); font-weight: 700; }
.result-runtime-error { color: var(--orange); font-weight: 700; }
.result-time-limit-exceeded, .result-memory-limit-exceeded { color: var(--danger); font-weight: 700; }
.result-compilation-error { color: var(--warning); font-weight: 700; }
.result-partial-correct { color: var(--yellow); font-weight: 700; }
.result-pending, .result-judging, .result-system-error { color: var(--text-muted); font-weight: 700; }

.verdict {
  display: inline-flex; align-items: center; padding: 0.45rem 1rem;
  border-radius: var(--r-sm); font-size: 0.875rem; font-weight: 700;
  background: var(--bg-muted); color: var(--text-2); border-left: 3px solid var(--text-faint);
}
.verdict.result-accepted { border-left-color: var(--success); background: var(--success-soft); color: var(--success); }
.verdict.result-wrong-answer { border-left-color: var(--danger); background: var(--danger-soft); color: var(--danger); }
.verdict.result-runtime-error { border-left-color: var(--orange); background: var(--orange-soft); color: var(--orange); }
.verdict.result-time-limit-exceeded, .verdict.result-memory-limit-exceeded { border-left-color: var(--danger); background: var(--danger-soft); color: var(--danger); }
.verdict.result-compilation-error { border-left-color: var(--warning); background: var(--warning-soft); color: var(--warning); }
.verdict.result-partial-correct { border-left-color: var(--yellow); background: rgba(202,138,4,0.08); color: var(--yellow); }
.verdict.result-pending, .verdict.result-judging, .verdict.result-system-error { border-left-color: var(--text-faint); background: var(--bg-muted); color: var(--text-muted); }

/* ── 12. Ranks ─────────────────────────────────────────────────────── */
.rank-stone { color: #94a3b8; } .rank-bronze { color: #cd7f32; } .rank-silver { color: #a8a29e; }
.rank-topaz { color: #fbbf24; } .rank-gold { color: #eab308; } .rank-sapphire { color: #3b82f6; }
.rank-platinum { color: #a78bfa; } .rank-diamond { color: #22d3ee; } .rank-obsidian { color: #71717a; }
.rank-mythril { color: #2dd4bf; } .rank-admin { color: #ef4444; }
.master-glow {
  background: linear-gradient(90deg, #818cf8, #22d3ee, #a78bfa, #818cf8);
  background-size: 300% auto;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: glow 5s linear infinite; font-weight: 800;
}
@keyframes glow { 0% { background-position: 0% 50%; } 100% { background-position: 300% 50%; } }

/* ── 13. Difficulty pills ──────────────────────────────────────────── */
.dp { display: inline-block; padding: 0.15rem 0.5rem; border-radius: var(--r-full); font-size: 0.7rem; font-weight: 700; font-family: var(--font-mono); }
.dp-stone { color: #94a3b8; background: rgba(148,163,184,0.1); } .dp-bronze { color: #cd7f32; background: rgba(205,127,50,0.1); }
.dp-copper { color: #cd7f32; background: rgba(205,127,50,0.1); } .dp-silver { color: #94a3b8; background: rgba(148,163,184,0.1); }
.dp-gold { color: #eab308; background: rgba(234,179,8,0.1); } .dp-topaz { color: #f59e0b; background: rgba(245,158,11,0.1); }
.dp-sapphire { color: #3b82f6; background: rgba(59,130,246,0.1); } .dp-platinum { color: #a78bfa; background: rgba(167,139,250,0.1); }
.dp-diamond { color: #22d3ee; background: rgba(34,211,238,0.1); } .dp-obsidian { color: #71717a; background: rgba(113,113,122,0.1); }
.dp-mythril { color: #2dd4bf; background: rgba(45,212,191,0.1); } .dp-quartz { color: #94a3b8; background: rgba(148,163,184,0.1); }

/* ── 14. Code ──────────────────────────────────────────────────────── */
pre, code { font-family: var(--font-mono); }
pre {
  background: var(--bg-sunken); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 0.9rem 1.1rem; font-size: 0.82rem; line-height: 1.7; overflow-x: auto; color: var(--text); margin: 0;
}
code { font-size: 0.82em; }

/* ── 15. Tabs ──────────────────────────────────────────────────────── */
.tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem; overflow-x: auto;
}
.tab {
  font-family: var(--font-sans); font-size: 0.875rem; font-weight: 500;
  color: var(--text-muted); background: none; border: none;
  padding: 0.7rem 1.1rem; cursor: pointer; position: relative;
  transition: color var(--dur) var(--ease); white-space: nowrap; text-decoration: none;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); font-weight: 700; }
.tab.active::after { content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 2px; background: var(--accent); border-radius: 1px 1px 0 0; }
a.tab { display: inline-flex; align-items: center; }
.tp { display: none; animation: fadeUp .3s var(--ease) both; }
.tp.active { display: block; }

/* ── 16. Toggle ────────────────────────────────────────────────────── */
.tog-row { display: flex; align-items: center; gap: 0.65rem; }
.tog { position: relative; display: inline-block; width: 38px; height: 20px; flex-shrink: 0; }
.tog input { opacity: 0; width: 0; height: 0; }
.tog-track { position: absolute; inset: 0; background: var(--bg-muted); border-radius: 10px; transition: background var(--dur) var(--ease); cursor: pointer; }
.tog-track::before { content: ''; position: absolute; width: 14px; height: 14px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: transform var(--dur) var(--ease); box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.tog input:checked + .tog-track { background: var(--accent); }
.tog input:checked + .tog-track::before { transform: translateX(18px); }
.tog-label { font-size: 0.82rem; color: var(--text-muted); }

/* ── 17. Tags ──────────────────────────────────────────────────────── */
.tag { display: inline-block; padding: 0.15rem 0.5rem; border-radius: var(--r-full); font-size: 0.75rem; font-weight: 600; font-family: var(--font-mono); background: var(--accent-soft); color: var(--accent); }

/* ── 18. Editor ────────────────────────────────────────────────────── */
.ed { border: 1px solid var(--border); border-radius: var(--r-sm); overflow: hidden; }

/* ── 19. Empty state ───────────────────────────────────────────────── */
.empty { text-align: center; padding: 3rem 1rem; color: var(--text-muted); font-size: 0.95rem; }

/* ── 20. Utilities ─────────────────────────────────────────────────── */
.flex { display: flex; } .col { flex-direction: column; } .wrap { flex-wrap: wrap; } .ac { align-items: center; }
.jc { justify-content: center; } .jb { justify-content: space-between; }
.g2 { gap: 0.25rem; } .g4 { gap: 0.5rem; } .g6 { gap: 0.6rem; } .g8 { gap: 0.75rem; } .g12 { gap: 1rem; } .g16 { gap: 1.25rem; }
.tc { text-align: center; } .fw6 { font-weight: 600; } .fw7 { font-weight: 700; }
.fs-sm { font-size: 0.82rem; } .fs-xs { font-size: 0.7rem; }
.mt4 { margin-top: 0.5rem; } .mt8 { margin-top: 0.75rem; } .mt12 { margin-top: 1rem; } .mt16 { margin-top: 1.25rem; } .mt24 { margin-top: 1.75rem; }
.mb8 { margin-bottom: 0.75rem; } .mb12 { margin-bottom: 1rem; } .mb16 { margin-bottom: 1.25rem; }

/* ── 21. Animations ────────────────────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideIn { from { transform: translateY(-100%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }
@keyframes shimmer { 0% { background-position: 0% center; } 100% { background-position: 200% center; } }
.anim { animation: fadeUp .35s var(--ease) both; }

/* ── 22. Navbar ────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  height: 56px; display: flex; align-items: center; justify-content: center;
  padding: 0 1.5rem;
  background: var(--bg-overlay);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  animation: slideIn .3s var(--ease) both;
}
.nav-in { max-width: 1100px; width: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-brand {
  font-size: 1.05rem; font-weight: 800; letter-spacing: -0.02em;
  color: var(--accent); text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.nav-brand:hover { color: var(--accent-hover); }
.nav-r { list-style: none; display: flex; align-items: center; gap: 0.4rem; margin: 0; padding: 0; }
.nb {
  font-size: 0.8rem; padding: 0.35rem 0.75rem; border-radius: var(--r-sm); font-weight: 600;
  border: 1px solid transparent; background: transparent;
  color: var(--text-muted); cursor: pointer; text-decoration: none;
  transition: all var(--dur) var(--ease);
  display: inline-flex; align-items: center; gap: 0.3rem; white-space: nowrap;
}
.nb:hover { color: var(--text); background: var(--bg-subtle); }
.nb-out { color: var(--danger); }
.nb-out:hover { background: var(--danger-soft); color: var(--danger); }
.nb-adm-d { color: var(--danger); }
.nb-adm-d:hover { background: var(--danger-soft); color: var(--danger); }
.nb-adm-s { color: var(--success); }
.nb-adm-s:hover { background: var(--success-soft); color: var(--success); }
.tt {
  background: var(--bg-subtle); border: 1px solid var(--border);
  color: var(--text-muted); padding: 0.3rem 0.55rem; border-radius: var(--r-sm);
  cursor: pointer; display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: 0.78rem; font-weight: 600;
  transition: all var(--dur) var(--ease);
}
.tt:hover { border-color: var(--accent); color: var(--accent); }
.tt svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
:root[data-theme="dark"] .tt-sun { display: none; }
:root:not([data-theme="dark"]) .tt-moon { display: none; }
.tt-lbl { font-size: 0.7rem; }
.nw { font-size: 0.82rem; color: var(--text-muted); white-space: nowrap; }
.nw a { text-decoration: none; }
@media (max-width: 640px) {
  .nav { height: auto; padding: 0.5rem 0.85rem; }
  .nav-in { flex-direction: column; gap: 0.4rem; }
  .nav-r { flex-wrap: wrap; justify-content: center; gap: 0.3rem; }
}

/* ── 23. Page-specific: Hero / Home ────────────────────────────────── */
.hero-container {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; min-height: calc(100vh - 56px); padding: 3rem 1.5rem;
  animation: fadeUp 0.6s var(--ease) both;
}
.hero-content { max-width: 680px; }
.hero-badge {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.25rem;
  padding: 0.35rem 1rem; border-radius: var(--r-full);
  background: var(--accent-soft); border: 1px solid var(--border);
}
.hero-content h1 {
  font-size: clamp(2.5rem, 5.5vw, 3.75rem); font-weight: 900;
  margin: 0 0 1.15rem; line-height: 1.1; color: var(--text); letter-spacing: -0.035em;
}
.hero-content .hero-tagline {
  font-size: 1.15rem; color: var(--text-muted); max-width: 500px;
  margin: 0 auto 2.5rem; line-height: 1.7; font-weight: 400;
}
.cta-buttons { display: flex; justify-content: center; gap: 0.85rem; flex-wrap: wrap; }
.hero-container .btn {
  padding: 0.85rem 1.75rem; font-size: 1rem; font-weight: 700;
  border-radius: var(--r-md); min-width: 155px;
}
.hero-container .btn-primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
  box-shadow: 0 4px 20px var(--accent-soft);
}
.hero-container .btn-primary:hover {
  background: var(--accent-hover); border-color: var(--accent-hover);
  box-shadow: 0 8px 30px var(--accent-soft);
  transform: translateY(-2px);
}
.hero-container .btn-secondary {
  background: var(--bg-surface); color: var(--text-2); border: 1px solid var(--border);
}
.hero-container .btn-secondary:hover {
  background: var(--bg-subtle); border-color: var(--border-strong);
  transform: translateY(-2px);
}
@media (max-width: 768px) { .hero-content .hero-tagline { font-size: 1.05rem; } }

/* ── 24. Auth pages (login, register) ──────────────────────────────── */
.auth-container {
  display: flex; align-items: center; justify-content: center;
  min-height: calc(100vh - 56px); padding: 5rem 1.5rem 3rem;
}
.auth-card {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); padding: 2.5rem;
  box-shadow: var(--shadow-md); width: 100%; max-width: 420px;
}
.auth-card h1 {
  font-size: 1.75rem; color: var(--text); text-align: center;
  margin: 0 0 2rem; font-weight: 800; letter-spacing: -0.02em;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600;
  margin-bottom: 0.4rem; color: var(--text-muted);
}
.form-control {
  width: 100%; font-family: var(--font-sans);
  background: var(--bg-surface); border: 1px solid var(--border); color: var(--text);
  padding: 0.7rem 0.9rem; font-size: 0.95rem; border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  box-sizing: border-box; outline: none;
}
.form-control:focus { border-color: var(--accent); box-shadow: var(--shadow-ring); }
.form-control::placeholder { color: var(--text-faint); }
.auth-submit {
  width: 100%; font-family: var(--font-sans); font-weight: 700;
  background: var(--accent); border: none; color: #fff;
  padding: 0.75rem 1.5rem; font-size: 1rem; border-radius: var(--r-sm);
  cursor: pointer; transition: all var(--dur) var(--ease); margin-top: 0.5rem;
  box-shadow: 0 4px 14px var(--accent-soft);
}
.auth-submit:hover {
  background: var(--accent-hover); transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-soft);
}
.g-recaptcha { margin-bottom: 1.25rem; display: flex; justify-content: center; }
.switch-link { margin-top: 1.75rem; text-align: center; color: var(--text-muted); font-size: 0.9rem; }
.switch-link a { color: var(--accent-text); font-weight: 600; }
.error-message {
  color: var(--danger); background: var(--danger-soft);
  border: 1px solid rgba(220,38,38,0.15); padding: 0.85rem 1rem;
  border-radius: var(--r-sm); margin-bottom: 1.25rem; font-size: 0.875rem;
}

/* ── 25. Leaderboard ───────────────────────────────────────────────── */
.lb-page { max-width: 1100px; margin: 5.5rem auto 4rem; padding: 0 1.5rem; }
.lb-page h1 {
  font-size: 2rem; font-weight: 800; color: var(--text);
  text-align: center; margin-bottom: 2rem; letter-spacing: -0.03em;
}
.lb-card {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); box-shadow: var(--shadow-sm); overflow: hidden;
}
.lb-card table { font-size: 0.875rem; }
.lb-card th, .lb-card td { padding: 0.85rem 1rem; }
.lb-card td a { color: var(--accent-text); font-weight: 600; }
.lb-card td a:hover { color: var(--accent-hover); }
.bio-cell { color: var(--text-faint); font-style: italic; font-size: 0.875rem; }
.rank-cell {
  font-family: var(--font-mono); font-size: 1rem; font-weight: 700;
  text-align: center; width: 56px;
}
.rank-1 { background: rgba(234,179,8,0.08); color: #b45309; }
.rank-2 { background: rgba(148,163,184,0.08); color: #64748b; }
.rank-3 { background: rgba(234,88,12,0.08); color: #c2410c; }
.rank-label { font-weight: 700; font-size: 0.82rem; }
@media (max-width: 768px) {
  .lb-page { padding: 0 1rem; }
  .bio-cell, th:last-child { display: none; }
  .lb-card th, .lb-card td { padding: 0.7rem 0.65rem; }
}

/* ── 26. User Profile ──────────────────────────────────────────────── */
.profile-wrap { max-width: 900px; margin: 5.5rem auto 4rem; padding: 0 1.5rem; }
.profile-header {
  display: flex; align-items: center; gap: 1.25rem;
  padding: 1.5rem 0; border-bottom: 1px solid var(--border); margin-bottom: 2rem;
}
.avatar {
  width: 88px; height: 88px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--accent); box-shadow: 0 0 0 3px var(--bg-surface), 0 0 20px var(--accent-soft);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.avatar:hover { transform: scale(1.04); box-shadow: 0 0 0 3px var(--bg-surface), 0 0 30px var(--accent-soft); }
.username-box { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em; }
.settings-button {
  text-decoration: none; background: var(--bg-surface); color: var(--accent-text);
  padding: 0.45rem 1rem; border-radius: var(--r-sm); font-size: 0.85rem; font-weight: 600;
  border: 1px solid var(--border); transition: all var(--dur) var(--ease); white-space: nowrap; margin-left: auto;
}
.settings-button:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.rank-badge {
  padding: 0.35rem 0.8rem; border-radius: var(--r-sm); font-size: 1rem; font-weight: 700;
  font-family: var(--font-mono); border: 1px solid var(--border); background: var(--bg-subtle);
}
.info-card {
  background: var(--bg-surface); border-radius: var(--r-lg); padding: 1.75rem;
  box-shadow: var(--shadow-xs); border: 1px solid var(--border); margin-bottom: 1.25rem;
}
.section-title {
  font-size: 1.1rem; color: var(--accent-text); margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; font-weight: 700;
}
.ratings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.rating-item {
  padding: 1.25rem; background: var(--bg-subtle); border-radius: var(--r-md);
  border: 1px solid var(--border);
}
.rating-item h3 { font-size: 1rem; color: var(--text); margin: 0 0 0.3rem; font-weight: 700; }
.rating-item p { font-size: 0.9rem; color: var(--text-muted); margin: 0 0 0.5rem; }
.rating-item .elo-value { color: var(--success); font-weight: 700; font-family: var(--font-mono); font-size: 1.15rem; }
.rating-bar-container { background: var(--bg-muted); border-radius: var(--r-full); height: 8px; margin-top: 0.6rem; overflow: hidden; }
.rating-bar-fill { height: 100%; border-radius: var(--r-full); transition: width 0.5s var(--ease); }
.rating-bar-label { font-size: 0.8rem; margin-top: 0.4rem; color: var(--text-faint); }
.permissions-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.75rem; }
.perm-tile {
  background: var(--bg-subtle); border-left: 3px solid var(--border);
  padding: 0.85rem 1rem; border-radius: var(--r-sm); display: flex; align-items: center;
  font-size: 0.9rem; color: var(--text-muted); border: 1px solid var(--border);
  transition: all var(--dur) var(--ease);
}
.perm-tile.granted { border-left-color: var(--success); color: var(--success); }
.perm-tile:not(.granted) { border-left-color: var(--danger); color: var(--danger); opacity: 0.7; }
.perm-tile span { margin-left: 0.5rem; font-weight: 600; }
.problem-header {
  padding: 0.85rem 1rem; background: var(--bg-subtle); font-size: 0.95rem; font-weight: 600;
  border-radius: var(--r-sm); border-left: 3px solid var(--text-faint); cursor: pointer;
  border: 1px solid var(--border); transition: all var(--dur) var(--ease);
}
.problem-header:hover { background: var(--bg-muted); }
.problem-header span { font-family: var(--font-mono); }
.problem-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 0.4rem; max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 0.5rem; background: var(--bg-surface);
}
.problem-list.open { padding-top: 0.75rem; padding-bottom: 0.75rem; max-height: 800px; }
.problem-list a {
  text-decoration: none; background: var(--bg-subtle); border: 1px solid var(--border);
  padding: 0.4rem; border-radius: var(--r-xs); color: var(--accent-text); text-align: center;
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600;
  transition: all var(--dur) var(--ease);
}
.problem-list a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.empty-label { color: var(--text-faint); font-style: italic; grid-column: 1 / -1; text-align: center; padding: 0.85rem; }
@media (max-width: 768px) {
  .profile-header { flex-direction: column; align-items: center; text-align: center; }
  .settings-button { margin-left: 0; }
  .ratings-grid { grid-template-columns: 1fr; }
  .permissions-grid { grid-template-columns: 1fr; }
}

/* ── 27. Settings & Admin ──────────────────────────────────────────── */
.settings-wrap { max-width: 780px; margin: 5.5rem auto 4rem; padding: 0 1.5rem; }
.settings-wrap h1 {
  font-size: 1.75rem; font-weight: 800; color: var(--text);
  text-align: center; margin-bottom: 2rem; letter-spacing: -0.02em;
}
.settings-card {
  background: var(--bg-surface); border-radius: var(--r-lg); padding: 2rem;
  box-shadow: var(--shadow-xs); border: 1px solid var(--border); margin-bottom: 1.5rem;
}
.settings-card h2 {
  font-size: 1.15rem; color: var(--accent-text); margin: 0 0 1.25rem;
  border-bottom: 1px solid var(--border); padding-bottom: 0.6rem; font-weight: 700;
}
.btn-submit {
  font-family: var(--font-sans); font-weight: 600;
  background: var(--accent); border: none; color: #fff;
  padding: 0.65rem 1.35rem; font-size: 0.95rem; border-radius: var(--r-sm);
  cursor: pointer; transition: all var(--dur) var(--ease); margin-top: 0.75rem;
}
.btn-submit:hover { background: var(--accent-hover); transform: translateY(-1px); }
.errorlist { list-style: none; padding: 0; margin: 0.5rem 0 0; color: var(--danger); font-size: 0.875rem; }
.helptext { font-size: 0.82rem; color: var(--text-faint); margin-top: 0.4rem; }
.messages { list-style: none; padding: 0; margin-bottom: 1.5rem; }
.messages .success {
  background: var(--success-soft); border-left: 3px solid var(--success);
  padding: 0.85rem 1rem; border-radius: var(--r-sm); color: var(--text);
}
.messages .error {
  background: var(--danger-soft); border-left: 3px solid var(--danger);
  padding: 0.85rem 1rem; border-radius: var(--r-sm); color: var(--text);
}

/* Admin-specific */
.admin-wrap { max-width: 900px; margin: 5.5rem auto 4rem; padding: 0 1.5rem; }
.admin-wrap h1 {
  font-size: 1.75rem; font-weight: 800; color: var(--text);
  text-align: center; margin-bottom: 2rem; letter-spacing: -0.02em;
}
.search-form { display: flex; gap: 0.75rem; margin-bottom: 1.25rem; }
.form-input {
  flex: 1; font-family: var(--font-sans);
  background: var(--bg-surface); border: 1px solid var(--border); color: var(--text);
  padding: 0.6rem 0.9rem; font-size: 0.95rem; border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  outline: none;
}
.form-input:focus { border-color: var(--accent); box-shadow: var(--shadow-ring); }
textarea.form-input { min-height: 80px; resize: vertical; }
.message {
  padding: 0.85rem 1.15rem; border-radius: var(--r-sm); margin-top: 1rem; font-weight: 600; font-size: 0.9rem;
}
.message.error { background: var(--danger-soft); border-left: 3px solid var(--danger); color: var(--danger); }
.message.success { background: var(--success-soft); border-left: 3px solid var(--success); color: var(--success); }
.user-details { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.75rem; font-size: 0.95rem; }
.user-details div { background: var(--bg-subtle); padding: 0.85rem 1rem; border-radius: var(--r-sm); border: 1px solid var(--border); }
.user-details .label { color: var(--text-faint); font-size: 0.78rem; display: block; margin-bottom: 0.2rem; }
.action-section { margin-top: 1.75rem; padding-top: 1.75rem; border-top: 1px solid var(--border); }
.action-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.action-card {
  background: var(--bg-subtle); padding: 1.35rem; border-radius: var(--r-md);
  border-left: 3px solid var(--border); border: 1px solid var(--border);
}
.action-card h3 { font-size: 1.05rem; margin: 0 0 0.85rem; color: var(--text); font-weight: 700; }
.action-card .form-group { margin-bottom: 0.85rem; }
.action-card label { display: block; margin-bottom: 0.4rem; font-weight: 600; color: var(--text-muted); font-size: 0.85rem; }
.btn-warning { background: var(--warning); color: #fff; border: none; padding: 0.55rem 1.15rem; border-radius: var(--r-sm); font-weight: 600; cursor: pointer; transition: all var(--dur) var(--ease); }
.btn-warning:hover { opacity: 0.9; transform: translateY(-1px); }

/* ── 28. Problem list ──────────────────────────────────────────────── */
.fbar {
  display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0.75rem 1rem;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-md); margin-bottom: 1.25rem; align-items: center;
}
.fbar .input { width: auto; flex: 1 1 180px; min-width: 0; padding: 0.5rem 0.75rem; font-size: 0.85rem; }
.fbar select.input { flex: 0 1 155px; }
.plist { display: flex; flex-direction: column; gap: 0.5rem; }
.prow {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.75rem 1.1rem; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--r-md);
  transition: all var(--dur) var(--ease); border-left: 3px solid var(--border-strong); cursor: default;
}
.prow:hover { box-shadow: var(--shadow-sm); border-color: var(--accent); transform: translateX(2px); }
.prow.ok { border-left-color: var(--success); } .prow.ok .pt { color: var(--success); }
.prow.wa { border-left-color: var(--danger); } .prow.wa .pt { color: var(--danger); }
.prow.un { border-left-color: var(--accent); }
.pi { flex: 1; min-width: 0; }
.ptrow { display: flex; align-items: baseline; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.15rem; }
.pt { font-size: 0.92rem; font-weight: 600; color: var(--text); transition: color var(--dur) var(--ease); }
.pmeta { display: flex; gap: 0.75rem; font-size: 0.72rem; color: var(--text-faint); font-family: var(--font-mono); }
.slink {
  display: inline-flex; align-items: center; padding: 0.35rem 0.8rem;
  font-size: 0.78rem; font-weight: 600; border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--accent-text); background: var(--bg-surface);
  text-decoration: none; transition: all var(--dur) var(--ease); flex-shrink: 0;
}
.slink:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
@media (max-width: 600px) { .prow { flex-direction: column; align-items: flex-start; gap: 0.5rem; } .slink { align-self: flex-start; } }

/* ── 29. Problem detail ────────────────────────────────────────────── */
.sec {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.35rem 1.5rem; margin-bottom: 1rem;
}
.sec p, .sec div { color: var(--text-2); font-size: 0.92rem; line-height: 1.75; }
.sec pre { margin: 0.4rem 0 0; }
.sec pre code { font-size: inherit; }
.lrow { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.lchip {
  flex: 1; min-width: 130px; display: flex; align-items: center; gap: 0.5rem;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: 0.6rem 0.9rem;
}
.lchip .li {
  width: 30px; height: 30px; border-radius: var(--r-xs);
  display: flex; align-items: center; justify-content: center; font-size: 0.82rem; flex-shrink: 0;
}
.lchip.t .li { background: rgba(234,88,12,0.08); color: var(--orange); }
.lchip.m .li { background: rgba(6,182,212,0.08); color: #06b6d4; }
.lchip .ll { font-size: 0.65rem; color: var(--text-faint); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
.lchip .lv { font-size: 0.875rem; font-weight: 700; color: var(--text); font-family: var(--font-mono); }
.tags-r { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.5rem; }
.el { font-size: 0.82rem; font-weight: 700; color: var(--text); margin: 0.75rem 0 0.25rem; }
.el:first-child { margin-top: 0; }
.eexp {
  border-left: 2px solid var(--accent); background: var(--bg-subtle);
  padding: 0.65rem 0.9rem; border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin-top: 0.35rem; font-size: 0.875rem; color: var(--text-2);
}
.eexp p { margin: 0; color: var(--text-2); }
.sf { display: flex; flex-direction: column; gap: 1rem; }
.sf .btn-primary { border-radius: var(--r-sm); }
.ebox {
  background: var(--danger-soft); color: var(--danger);
  border: 1px solid rgba(220,38,38,0.15); border-radius: var(--r-sm);
  padding: 0.7rem 0.9rem; font-size: 0.82rem;
}
.ebox ul { margin: 0; padding-left: 1.1rem; }
.stbl { font-size: 0.82rem; }
.stbl th { font-size: 0.65rem; }
.stbl td { padding: 0.55rem 0.75rem; }
.vl {
  font-size: 0.78rem; font-weight: 600; color: var(--accent-text);
  padding: 0.18rem 0.5rem; border: 1px solid var(--border);
  border-radius: var(--r-sm); transition: all var(--dur) var(--ease); text-decoration: none;
}
.vl:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
#monaco-editor { height: 400px; }
@media (max-width: 768px) { .sec { padding: 1.1rem 1rem; } }

/* ── 30. Submission status ─────────────────────────────────────────── */
.sc { max-width: 860px; margin: 0 auto; }
.hero { text-align: center; margin-bottom: 1.25rem; }
.hero h1 { font-size: 1.4rem; font-weight: 800; color: var(--text); margin: 0 0 0.65rem; }
.mrow { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; font-size: 0.875rem; color: var(--text-2); margin-bottom: 0.85rem; }
.mrow strong { color: var(--text); }
.vrow { display: flex; justify-content: center; margin-bottom: 1.25rem; }
.mets { display: flex; gap: 0.6rem; flex-wrap: wrap; justify-content: center; margin-bottom: 1.25rem; }
.met { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 0.55rem 1rem; text-align: center; }
.met-l { font-size: 0.6rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); font-weight: 700; }
.met-v { font-size: 1rem; font-weight: 700; font-family: var(--font-mono); color: var(--text); margin-top: 0.15rem; }
.ds { background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 1.35rem 1.5rem; margin-bottom: 1rem; }
.ds h3 {
  font-size: 0.92rem; font-weight: 700; color: var(--text); margin: 0 0 0.65rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.ds h3::before { content: ''; width: 3px; height: 1em; background: var(--accent); border-radius: 2px; flex-shrink: 0; }
.ds pre { max-height: 260px; overflow-y: auto; white-space: pre-wrap; word-wrap: break-word; }
.sb { display: inline-flex; align-items: center; padding: 0.15rem 0.5rem; border-radius: var(--r-full); font-size: 0.72rem; font-weight: 700; }
.sb.accepted { background: var(--success-soft); color: var(--success); }
.sb.wrong-answer, .sb.runtime-error, .sb.compilation-error { background: var(--danger-soft); color: var(--danger); }
.sb.time-limit-exceeded, .sb.memory-limit-exceeded { background: var(--danger-soft); color: var(--danger); }
.sb.partial-correct { background: var(--warning-soft); color: var(--warning); }
.sb.pending, .sb.judging, .sb.system-error { background: var(--bg-muted); color: var(--text-muted); }
.brow { display: flex; justify-content: center; margin-top: 1.5rem; }

/* ── 31. Groups ────────────────────────────────────────────────────── */
.gc {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.85rem 1.15rem; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--r-md);
  cursor: pointer; transition: all var(--dur) var(--ease);
  text-decoration: none; color: inherit;
}
.gc:hover { box-shadow: var(--shadow-sm); border-color: var(--accent); transform: translateX(2px); }
.gc:hover .gn { color: var(--accent-text); }
.gnum {
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-xs); background: var(--accent-soft); color: var(--accent);
  font-weight: 700; font-size: 0.82rem; font-family: var(--font-mono); flex-shrink: 0;
}
.gi { flex: 1; min-width: 0; }
.gn { font-weight: 600; font-size: 0.92rem; color: var(--text); transition: color var(--dur) var(--ease); }
.gd { font-size: 0.78rem; color: var(--text-faint); margin-top: 0.1rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gm { display: flex; align-items: center; gap: 0.6rem; flex-shrink: 0; }
.gcnt { font-family: var(--font-mono); font-weight: 700; font-size: 0.82rem; color: var(--text-2); }
.sp { display: inline-flex; padding: 0.15rem 0.5rem; border-radius: var(--r-full); font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.sp-a { background: var(--success-soft); color: var(--success); } .sp-u { background: var(--info-soft); color: var(--info); }
.sp-f { background: var(--danger-soft); color: var(--danger); } .sp-p { background: var(--bg-muted); color: var(--text-muted); }
@media (max-width: 600px) { .gd { display: none; } .gc { gap: 0.6rem; } }

/* Group detail */
.gh { margin-bottom: 1.25rem; }
.gh h1 { font-size: 1.4rem; font-weight: 800; color: var(--text); margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.gh .gd { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--r-md); padding: 0.9rem 1.15rem; }
.prl {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.75rem 1.15rem; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--r-md);
  transition: all var(--dur) var(--ease); text-decoration: none; color: inherit;
}
.prl:hover { box-shadow: var(--shadow-sm); border-color: var(--accent); transform: translateX(2px); }
.prl:hover .ptc { color: var(--accent-text); }
.pc { font-family: var(--font-mono); font-weight: 700; color: var(--warning); font-size: 0.82rem; width: 42px; text-align: center; flex-shrink: 0; }
.ptc { flex: 1; min-width: 0; font-weight: 600; font-size: 0.92rem; color: var(--text); transition: color var(--dur) var(--ease); }
.pdc { flex-shrink: 0; }
.psc { flex-shrink: 0; font-size: 0.82rem; }
.psc .chk { color: var(--success); font-weight: 700; }
@media (max-width: 600px) { .prl { gap: 0.5rem; padding: 0.6rem 0.85rem; } .pc { width: 35px; font-size: 0.72rem; } }

/* ── 32. Forum ─────────────────────────────────────────────────────── */
.forum-wrap { max-width: 780px; margin: 5.5rem auto 4rem; padding: 0 1.5rem; }
.forum-wrap h1 { font-size: 1.75rem; font-weight: 800; color: var(--text); margin-bottom: 1.25rem; }
.forum-card {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.75rem; box-shadow: var(--shadow-xs);
}
.forum-card p { color: var(--text-2); line-height: 1.7; margin: 0; }
a.back { display: inline-block; margin-top: 1.25rem; color: var(--accent-text); font-weight: 600; }
a.back:hover { color: var(--accent-hover); }
.links { margin-top: 1rem; }
.links a { color: var(--accent-text); font-weight: 600; }

/* ── 33. 404 ───────────────────────────────────────────────────────── */
.four04 {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 100vh; text-align: center; padding: 2rem; font-family: var(--font-mono);
}
.four04 h1 { font-size: 3rem; margin-bottom: 0.75rem; color: var(--accent); font-weight: 800; }
.four04 p { font-size: 1.1rem; margin-bottom: 2rem; color: var(--text-muted); }
.four04 .ascii { font-size: 0.95rem; color: var(--text-faint); margin-bottom: 2rem; white-space: pre; }

/* ── 34. Disabled page ─────────────────────────────────────────────── */
.disabled-container {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 2rem 1.5rem;
}
.disabled-card {
  background: var(--bg-surface); border-radius: var(--r-xl);
  padding: 2.5rem; box-shadow: var(--shadow-md);
  border: 1px solid var(--border); border-top: 4px solid var(--danger);
  width: 100%; max-width: 440px; text-align: center;
}
.disabled-card h1 { font-size: 1.75rem; color: var(--text); font-weight: 800; margin: 0 0 1.5rem; }
.disabled-card h2 { font-size: 1.35rem; color: var(--danger); font-weight: 800; text-transform: uppercase; margin: 0 0 1rem; letter-spacing: 0.03em; }
.disabled-card p { color: var(--text-muted); line-height: 1.7; margin: 0 0 1.5rem; font-size: 0.95rem; }
.disabled-card .icon { width: 64px; height: 64px; color: var(--danger); margin: 0 auto 1.5rem; }
.disabled-card .btn-danger-fill {
  display: inline-block; padding: 0.7rem 2rem; background: var(--danger); color: #fff;
  font-weight: 700; border-radius: var(--r-sm); transition: all var(--dur) var(--ease);
  text-decoration: none; font-size: 0.95rem;
}
.disabled-card .btn-danger-fill:hover { opacity: 0.9; transform: translateY(-1px); }
.disabled-card .footer-note { margin-top: 1.75rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }
.disabled-card .footer-note p { font-size: 0.85rem; color: var(--text-faint); margin: 0; }
.disabled-card .footer-note a { color: var(--danger); font-weight: 600; }

/* ====== CONTESTS (v1) ============================================== */
.sec { margin-top: 1.5rem; }
.sh  { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin: 0 0 0.75rem; }

.ct-card {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1rem;
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 1rem 1.25rem; text-decoration: none; color: var(--text);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.ct-card:hover { border-color: var(--border-strong); transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.ct-left { min-width: 0; }
.ct-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.ct-name { font-size: 1.1rem; font-weight: 700; margin-top: 0.4rem; color: var(--text); letter-spacing: -0.01em; }
.ct-meta { display: flex; flex-wrap: wrap; gap: 0.45rem; color: var(--text-muted); font-size: 0.85rem; margin-top: 0.25rem; font-family: var(--font-mono); }

.ct-cta { color: var(--accent); font-weight: 700; font-size: 0.9rem; white-space: nowrap; }
.ct-card:hover .ct-cta { color: var(--accent-hover); }

.ct-div { display: inline-flex; align-items: center; padding: 0.2rem 0.55rem; border-radius: var(--r-sm); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.04em; }
.ct-div-1 { background: rgba(220,38,38,0.1);  color: #dc2626; border: 1px solid rgba(220,38,38,0.25); }
.ct-div-2 { background: rgba(217,119,6,0.1);  color: #d97706; border: 1px solid rgba(217,119,6,0.25); }
.ct-div-3 { background: rgba(79,70,229,0.1);  color: var(--accent); border: 1px solid var(--accent-soft); }
.ct-div-4 { background: rgba(100,116,139,0.1); color: var(--text-muted); border: 1px solid var(--border); }

.ct-pill { display: inline-flex; align-items: center; padding: 0.15rem 0.5rem; border-radius: var(--r-full); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.03em; }
.ct-pill-live  { background: rgba(5,150,105,0.12);  color: var(--success); }
.ct-pill-up    { background: var(--accent-soft); color: var(--accent); }
.ct-pill-end   { background: var(--bg-muted); color: var(--text-muted); }
.ct-pill-rated { background: rgba(217,119,6,0.12); color: var(--warning); }
.ct-pill-muted { background: var(--bg-muted); color: var(--text-muted); }
.ct-pill-reg   { background: rgba(5,150,105,0.12); color: var(--success); }
.ct-pill-done  { background: rgba(79,70,229,0.12); color: var(--accent); }

/* Hero */
.ct-hero { padding: 1.5rem 1.75rem; }
.ct-hero-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; }
.ct-hero-cta { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.ct-desc { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-subtle); color: var(--text-2); line-height: 1.65; font-size: 0.95rem; }

/* Problem rows */
.ct-prow {
  display: grid; grid-template-columns: 60px 1fr auto; align-items: center; gap: 1rem;
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 0.9rem 1.15rem; text-decoration: none; color: var(--text);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.ct-prow:hover { border-color: var(--accent); transform: translateY(-1px); }
.ct-pcode { font-family: var(--font-mono); font-weight: 800; font-size: 1.1rem; color: var(--accent); text-align: center; }
.ct-pname { min-width: 0; }
.ct-pt { font-weight: 700; color: var(--text); }
.ct-pm { display: flex; gap: 0.5rem; align-items: center; color: var(--text-muted); font-size: 0.8rem; margin-top: 0.2rem; }
.ct-pscore { white-space: nowrap; }

/* Standings table */
.ct-table-wrap { overflow-x: auto; padding: 0; }
.ct-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 0.9rem; }
.ct-table thead th {
  text-align: left; padding: 0.7rem 0.85rem; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted);
  background: var(--bg-subtle); border-bottom: 1px solid var(--border); white-space: nowrap;
}
.ct-table tbody td { padding: 0.65rem 0.85rem; border-bottom: 1px solid var(--border-subtle); vertical-align: middle; }
.ct-table tbody tr:last-child td { border-bottom: none; }
.ct-pth { text-align: center !important; font-family: var(--font-mono); }
.ct-ptpts { font-size: 0.65rem; color: var(--text-faint); font-weight: 500; text-transform: none; letter-spacing: 0; }
.ct-cell { text-align: center; font-family: var(--font-mono); font-weight: 700; }
.ct-cell-ok { color: var(--success); }
.ct-cell-partial { color: var(--warning); }
.ct-cell-none { color: var(--text-faint); }

.ct-rank {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 32px; height: 32px; padding: 0 0.5rem;
  border-radius: var(--r-sm); font-weight: 800; font-family: var(--font-mono);
}
.ct-rank-1 { background: linear-gradient(135deg,#fde68a,#f59e0b); color: #78350f; }
.ct-rank-2 { background: linear-gradient(135deg,#e2e8f0,#94a3b8); color: #1e293b; }
.ct-rank-3 { background: linear-gradient(135deg,#fed7aa,#c2410c); color: #431407; }
.ct-rank-n { background: var(--bg-subtle); color: var(--text-muted); }

/* Tier breakdown formula on profile */
.tier-formula {
  display: flex; align-items: stretch; gap: 0.75rem; flex-wrap: wrap;
  background: var(--bg-subtle); border: 1px solid var(--border); border-radius: var(--r-md); padding: 1rem;
}
.tier-formula .tf-part {
  flex: 1 1 140px; min-width: 140px; text-align: center;
  background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--r-sm); padding: 0.9rem 0.75rem;
}
.tier-formula .tf-total { border-color: var(--accent); background: var(--accent-soft); }
.tier-formula .tf-op { align-self: center; font-size: 1.35rem; font-weight: 800; color: var(--text-muted); font-family: var(--font-mono); }
.tier-formula .tf-n { font-size: 1.35rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; font-family: var(--font-mono); }
.tier-formula .tf-l { font-size: 0.8rem; font-weight: 700; color: var(--text); margin-top: 0.25rem; }
.tier-formula .tf-s { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.1rem; line-height: 1.35; }
@media (max-width: 640px) {
  .tier-formula .tf-op { display: none; }
  .tier-formula .tf-part { flex-basis: 100%; }
}

/* Contest create: problem picker */
.cc-plist {
  display: flex; flex-direction: column; gap: .35rem;
  max-height: 340px; overflow: auto;
  border: 1px solid var(--border); border-radius: var(--r-md);
  padding: .5rem; background: var(--bg-sunken);
}
.cc-prow {
  display: grid; grid-template-columns: 24px 64px 1fr auto; align-items: center; gap: .75rem;
  padding: .55rem .75rem; border-radius: var(--r-sm);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  cursor: pointer; transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.cc-prow:hover { border-color: var(--accent); }
.cc-prow input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }
.cc-pid    { font-family: var(--font-mono); color: var(--text-muted); font-size: .82rem; }
.cc-ptitle { font-weight: 600; color: var(--text); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Language switcher (navbar) */
.lang-form { margin: 0; padding: 0; display: inline-flex; align-items: center; }
.lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 0.35rem 1.8rem 0.35rem 0.6rem;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path d='M1 1l4 4 4-4' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.55rem center;
}
.lang-select:hover { border-color: var(--border-strong); color: var(--text); }
.lang-select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.lang-select option { background: var(--bg-surface); color: var(--text); }

/* =========================================================================
   Per-problem stats
   ========================================================================= */
.pstats-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  justify-content: center;
  margin: .5rem 0 1.25rem;
}
.pstat-chip {
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  padding: .6rem 1rem;
  min-width: 110px;
  text-align: center;
  transition: border-color var(--dur, .18s) var(--ease, ease), transform var(--dur, .18s) var(--ease, ease);
}
.pstat-chip:hover { border-color: var(--border-strong, var(--border)); }
.pstat-chip-n {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .01em;
}
.pstat-chip-l {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-top: .15rem;
}
.pstat-chip-rate { border-color: var(--accent); }
.pstat-chip-rate .pstat-chip-n { color: var(--accent); }
.pstat-chip-limit { border-style: dashed; }
.pstat-chip-limit .pstat-chip-n { color: var(--text-muted); font-size: 1.05rem; }

/* Inline stats used inside the problem-list row meta */
.pmeta .pstat {
  display: inline-flex; align-items: baseline; gap: .3rem;
}
.pmeta .pstat-n { font-family: var(--font-mono, monospace); font-weight: 700; color: var(--text); }
.pmeta .pstat-l { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.pmeta .pstat-rate .pstat-n { color: var(--accent); }

/* =========================================================================
   Forum
   ========================================================================= */
.fm-tabs {
  display: flex; flex-wrap: wrap; gap: .4rem;
  margin: .5rem 0 1rem;
  padding: .25rem; background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border); border-radius: 999px; width: fit-content;
}
.fm-tab {
  display: inline-block; padding: .45rem .95rem;
  border-radius: 999px; font-size: .82rem; font-weight: 600;
  color: var(--text-muted); text-decoration: none;
  transition: background var(--dur,.18s) var(--ease,ease), color var(--dur,.18s) var(--ease,ease);
}
.fm-tab:hover { color: var(--text); }
.fm-tab.active { background: var(--accent); color: #fff; }

.fm-list { display: flex; flex-direction: column; gap: .55rem; }
.fm-row {
  display: flex; align-items: center; gap: 1rem;
  padding: .9rem 1.1rem;
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  text-decoration: none; color: inherit;
  transition: transform var(--dur,.18s) var(--ease,ease), border-color var(--dur,.18s) var(--ease,ease);
}
.fm-row:hover { border-color: var(--accent); transform: translateY(-1px); }
.fm-row-main { flex: 1; min-width: 0; }
.fm-row-title {
  display: flex; align-items: center; gap: .55rem; flex-wrap: wrap;
  font-weight: 600; color: var(--text);
}
.fm-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.fm-row-meta {
  display: flex; flex-wrap: wrap; gap: .45rem;
  margin-top: .35rem;
  font-size: .8rem; color: var(--text-muted);
}
.fm-row-side { flex: 0 0 auto; }
.fm-replies {
  min-width: 64px; text-align: center;
  padding: .35rem .55rem;
  border-left: 1px solid var(--border);
}
.fm-replies-n {
  font-family: var(--font-mono, monospace);
  font-weight: 700; font-size: 1.1rem; color: var(--text);
}
.fm-replies-l {
  font-size: .68rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-muted);
}
.fm-lock { font-size: .85rem; }

/* Category badges */
.fm-badge {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 999px;
  font-size: .7rem; font-weight: 700; letter-spacing: .05em;
  text-transform: uppercase;
  border: 1px solid var(--border);
}
.fm-badge-general { color: var(--text); background: var(--bg); }
.fm-badge-help    { color: #fff; background: var(--accent); border-color: var(--accent); }
.fm-badge-typo    { color: #fff; background: #b45309; border-color: #b45309; }

.fm-cat-help  { border-left: 3px solid var(--accent); }
.fm-cat-typo  { border-left: 3px solid #b45309; }

/* Pager */
.fm-pager {
  display: flex; align-items: center; justify-content: center;
  gap: .9rem; margin: 1.25rem 0 .5rem;
}
.fm-pager-n { color: var(--text-muted); font-size: .85rem; }

/* Post detail */
.fm-post { margin-bottom: 1rem; }
.fm-post-h {
  display: flex; align-items: flex-start; justify-content: space-between; gap: .75rem;
  flex-wrap: wrap;
}
.fm-post-h-l { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.fm-post-title {
  margin: 0; font-size: 1.35rem; font-weight: 700; color: var(--text);
}
.fm-post-prob {
  font-size: .82rem; color: var(--text-muted); text-decoration: none;
  border: 1px solid var(--border); border-radius: var(--r-sm, 6px); padding: .2rem .55rem;
}
.fm-post-prob:hover { border-color: var(--accent); color: var(--text); }
.fm-post-meta {
  margin-top: .35rem; display: flex; flex-wrap: wrap; gap: .4rem;
  font-size: .82rem; color: var(--text-muted);
}
.fm-post-body, .fm-reply-body {
  margin-top: .8rem; line-height: 1.6; color: var(--text);
  word-wrap: break-word;
}
.fm-post-body pre, .fm-reply-body pre {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--r-sm, 6px); padding: .6rem .8rem; overflow-x: auto;
}

.fm-replies-sec { margin-top: 1.25rem; }
.fm-replies-h {
  font-size: 1rem; margin: 0 0 .65rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .08em; font-weight: 700;
}
.fm-reply { margin-bottom: .65rem; }
.fm-reply-meta {
  display: flex; flex-wrap: wrap; gap: .4rem;
  font-size: .8rem; color: var(--text-muted);
}
.fm-del { color: #b04141; }
.fm-del:hover { text-decoration: underline; }

/* Post form */
.fm-form .field, .fm-reply-form .field { margin-bottom: .85rem; }
.fm-form select.input, .fm-form textarea.input, .fm-form input.input,
.fm-reply-form textarea.input {
  width: 100%;
}

/* =========================================================================
   Profile extras: tagline, ranking summary, external links, language bars,
   submission verdict bars, VS comparison page
   ========================================================================= */

.tagline {
  margin: .35rem 0 .5rem;
  font-size: .95rem;
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  max-width: 620px;
}

.profile-actions {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: .5rem; margin-top: .75rem;
}
.settings-button-ghost {
  background: transparent !important;
  color: var(--text) !important;
  border: 1px solid var(--border) !important;
}
.settings-button-ghost:hover { border-color: var(--accent) !important; color: var(--accent) !important; }

/* Bio, rendered as Markdown */
.bio-md { color: var(--text-2); line-height: 1.7; }
.bio-md p { margin: 0 0 .65rem; }
.bio-md p:last-child { margin-bottom: 0; }
.bio-md a { color: var(--accent); text-decoration: underline; }
.bio-md code { background: var(--bg-2, var(--bg)); padding: .1rem .35rem; border-radius: 4px; font-family: var(--font-mono, monospace); font-size: .9em; }
.bio-md pre { background: var(--bg-2, var(--bg)); padding: .75rem; border-radius: var(--r-sm, 6px); overflow-x: auto; }
.bio-md ul, .bio-md ol { padding-left: 1.5rem; margin: .25rem 0 .65rem; }
.bio-md h1, .bio-md h2, .bio-md h3 { margin: .9rem 0 .45rem; color: var(--text); font-weight: 700; }

/* Ranking summary card */
.rank-summary {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 1.2rem; padding: 1.2rem 1.4rem;
}
.rank-summary .rs-num {
  font-family: var(--font-mono, monospace);
  font-size: 2.4rem; font-weight: 800;
  color: var(--accent); line-height: 1;
}
.rank-summary .rs-num.small { font-size: 1.6rem; }
.rank-summary .rs-meta, .rank-summary .rs-elo { display: flex; flex-direction: column; gap: .15rem; }
.rank-summary .rs-l {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-muted); font-weight: 700;
}
.rank-summary .rs-s { font-size: .9rem; color: var(--text-2); }
.rank-summary .rs-divider {
  width: 1px; align-self: stretch;
  background: var(--border);
  margin: 0 .25rem;
}

/* External profile links */
.ext-links { display: flex; flex-wrap: wrap; gap: .55rem; }
.ext-link {
  display: inline-flex; flex-direction: column;
  padding: .55rem .85rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  text-decoration: none;
  background: var(--bg-surface, var(--bg));
  transition: transform var(--dur, .18s), border-color var(--dur, .18s);
  min-width: 130px;
}
.ext-link:hover { transform: translateY(-1px); border-color: var(--accent); }
.ext-link .ext-name {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-muted); font-weight: 700;
}
.ext-link .ext-handle {
  font-family: var(--font-mono, monospace);
  color: var(--text); font-weight: 600; margin-top: .15rem;
  word-break: break-all;
}
.ext-cf .ext-name { color: #1f8acb; }
.ext-ac .ext-name { color: #2bb673; }
.ext-boj .ext-name { color: #0080c0; }
.ext-lc .ext-name { color: #ffa116; }
.ext-gh .ext-name { color: var(--text); }
.ext-web .ext-name { color: #8b5cf6; }

/* Submission stats grid */
.sub-stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: .65rem; margin-bottom: 1rem;
}
.ss-tile {
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  padding: .85rem .65rem; text-align: center;
}
.ss-tile .ss-n {
  font-family: var(--font-mono, monospace);
  font-size: 1.45rem; font-weight: 700; color: var(--text);
}
.ss-tile .ss-l {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-muted); margin-top: .25rem;
}
.ss-tile.ss-ac { border-color: #4caf50; }
.ss-tile.ss-ac .ss-n { color: #4caf50; }
.ss-tile.ss-rate { border-color: var(--accent); }
.ss-tile.ss-rate .ss-n { color: var(--accent); }

/* Stacked verdict bar */
.verdict-bar {
  display: flex; height: 14px; width: 100%;
  border-radius: 999px; overflow: hidden;
  background: var(--border);
  margin: .25rem 0 .65rem;
}
.vb-seg { transition: opacity .15s; }
.vb-seg:hover { opacity: .85; }
.vb-ac { background: #4caf50; }
.vb-wa { background: #f04848; }
.vb-tle { background: #f59e0b; }
.vb-re { background: #a855f7; }
.vb-ce { background: #6b7280; }
.vb-other { background: #94a3b8; }

.verdict-legend {
  display: flex; flex-wrap: wrap; gap: .85rem;
  font-size: .82rem; color: var(--text-2);
}
.vlg { display: inline-flex; align-items: center; gap: .35rem; }
.vlg-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.vlg-ac .vlg-dot { background: #4caf50; }
.vlg-wa .vlg-dot { background: #f04848; }
.vlg-tle .vlg-dot { background: #f59e0b; }
.vlg-re .vlg-dot { background: #a855f7; }
.vlg-ce .vlg-dot { background: #6b7280; }
.vlg-other .vlg-dot { background: #94a3b8; }
.vlg strong { color: var(--text); }
.vlg-pct { color: var(--text-muted); font-family: var(--font-mono, monospace); }

/* Language analysis table */
.favlang {
  font-size: .72rem; font-weight: 600; color: var(--accent);
  margin-left: .5rem; text-transform: none; letter-spacing: 0;
}
.lang-table { display: flex; flex-direction: column; gap: .3rem; }
.lang-row {
  display: grid;
  grid-template-columns: 1.2fr 2.5fr .8fr .8fr .8fr .8fr;
  align-items: center;
  gap: .5rem;
  padding: .5rem .25rem;
  border-bottom: 1px dashed var(--border);
  font-size: .9rem;
}
.lang-row:last-child { border-bottom: none; }
.lang-row.lang-head {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-muted); font-weight: 700;
  border-bottom: 1px solid var(--border);
}
.lr-name { font-weight: 600; }
.lr-bar { display: flex; align-items: center; gap: .55rem; }
.lr-acc, .lr-rate, .lr-share, .lr-solved { font-family: var(--font-mono, monospace); }
.lb-track {
  flex: 1; height: 8px; background: var(--border);
  border-radius: 999px; overflow: hidden;
}
.lb-fill { display: block; height: 100%; }
.lb-n { font-family: var(--font-mono, monospace); color: var(--text); min-width: 2.5em; text-align: right; }

.lang-cpp  { color: #00599c; }
.lang-c    { color: #555555; }
.lang-py   { color: #3776ab; }
.lang-java { color: #b07219; }
.lang-other{ color: var(--text-muted); }

.lang-cpp-bg  { background: linear-gradient(90deg, #00599c, #3aa1d1); }
.lang-c-bg    { background: linear-gradient(90deg, #555555, #888888); }
.lang-py-bg   { background: linear-gradient(90deg, #3776ab, #ffd43b); }
.lang-java-bg { background: linear-gradient(90deg, #b07219, #f59e0b); }
.lang-other-bg{ background: linear-gradient(90deg, #94a3b8, #cbd5e1); }

@media (max-width: 760px) {
  .lang-row {
    grid-template-columns: 1fr 1fr;
    gap: .35rem;
  }
  .lang-row.lang-head { display: none; }
  .lr-bar { grid-column: 1 / -1; }
}

/* =========================================================================
   VS pages
   ========================================================================= */

.vs-pick-wrap {
  max-width: 720px; margin: 2rem auto; padding: 0 1rem;
}
.vs-pick-card {
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-lg, 14px);
  padding: 2rem 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,.04));
}
.vs-pick-title {
  font-size: 1.8rem; margin: 0 0 .35rem; color: var(--text);
}
.vs-pick-vs {
  background: linear-gradient(135deg, var(--accent), #f43f5e);
  color: #fff; padding: .15rem .55rem;
  border-radius: 999px; font-size: 1rem; vertical-align: middle;
  margin-left: .35rem;
}
.vs-pick-sub { color: var(--text-muted); margin-bottom: 1.5rem; }
.vs-pick-pair {
  display: flex; align-items: center; gap: .65rem;
  margin-bottom: 1rem; justify-content: center;
}
.vs-pick-pair input { max-width: 240px; text-align: center; }
.vs-pick-x {
  font-weight: 700; color: var(--accent); font-size: 1.1rem;
}
.vs-pick-go { padding: .65rem 1.6rem; }
.vs-pick-sugs { margin-top: 1.5rem; text-align: left; }
.vps-l {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-muted); margin-bottom: .5rem;
}
.vps-row { display: flex; flex-wrap: wrap; gap: .4rem; }
.vps-tag {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .25rem .65rem .25rem .55rem;
  font-size: .85rem; text-decoration: none;
  transition: border-color .15s;
}
.vps-tag:hover { border-color: var(--accent); }
.vps-elo { font-family: var(--font-mono, monospace); color: var(--text-muted); }

/* VS compare page */
.vs-wrap { max-width: 1100px; margin: 1.5rem auto; padding: 0 1rem; }
.vs-banner {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 1rem; align-items: center;
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-lg, 14px);
  padding: 1.5rem 1.25rem;
  margin-bottom: 1.25rem;
}
.vs-side {
  display: flex; flex-direction: column; align-items: center;
  gap: .25rem; padding: .75rem;
  border-radius: var(--r-md, 10px);
  text-decoration: none;
  transition: background .18s, transform .18s;
}
.vs-side:hover { background: var(--bg); transform: translateY(-2px); }
.vs-side.vs-leading {
  box-shadow: 0 0 0 2px var(--accent) inset;
}
.vs-avatar {
  width: 88px; height: 88px; border-radius: 50%;
  object-fit: cover; border: 2px solid var(--border);
}
.vs-name { font-size: 1.3rem; font-weight: 700; }
.vs-rank { color: var(--text-muted); font-size: .85rem; }
.vs-elo {
  font-family: var(--font-mono, monospace);
  font-size: 1.4rem; font-weight: 700; color: var(--text);
}
.vs-tag { font-size: .8rem; color: var(--text-muted); font-style: italic; max-width: 220px; text-align: center; }
.vs-mid { display: flex; flex-direction: column; align-items: center; gap: .35rem; }
.vs-vs {
  background: linear-gradient(135deg, var(--accent), #f43f5e);
  color: #fff; padding: .25rem .85rem;
  border-radius: 999px; font-weight: 800; letter-spacing: .1em;
}
.vs-score {
  font-family: var(--font-mono, monospace);
  font-size: 1.6rem; color: var(--text-muted);
}
.vs-score .vs-win { color: var(--accent); font-weight: 800; }
.vs-score .vs-dash { margin: 0 .35rem; }
.vs-score-l {
  font-size: .7rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-muted);
}

/* Stats table on VS page */
.vs-table { display: flex; flex-direction: column; gap: .35rem; }
.vs-row {
  display: grid; grid-template-columns: 1fr 1.2fr 1fr;
  align-items: center; gap: .5rem;
  padding: .65rem .25rem;
  border-bottom: 1px dashed var(--border);
}
.vs-row:last-child { border-bottom: none; }
.vs-cell { font-family: var(--font-mono, monospace); font-size: 1.05rem; color: var(--text); }
.vs-cell-a { text-align: right; }
.vs-cell-b { text-align: left; }
.vs-cell-l {
  text-align: center; font-family: var(--font-sans, system-ui, sans-serif);
  font-size: .8rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .08em; font-weight: 600;
}
.vs-cell-win {
  color: var(--accent); font-weight: 800;
  position: relative;
}
.vs-cell-win::after {
  content: "★";
  display: inline-block; margin-left: .35rem; color: var(--accent);
  font-size: .8em;
}

/* Solved problem overlap */
.vs-overlap {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem;
}
.vol {
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  padding: .85rem;
}
.vol-h {
  font-size: .82rem; font-weight: 700;
  color: var(--text-muted); margin-bottom: .55rem;
  text-transform: uppercase; letter-spacing: .06em;
}
.vol-a .vol-h { color: #3b82f6; }
.vol-b .vol-h { color: #f43f5e; }
.vol-c .vol-h { color: #10b981; }
.vol-pids { display: flex; flex-wrap: wrap; gap: .25rem; }
.vol-pids a {
  font-family: var(--font-mono, monospace); font-size: .82rem;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: .12rem .4rem; border-radius: 6px;
  text-decoration: none; color: var(--text-2);
}
.vol-pids a:hover { border-color: var(--accent); color: var(--accent); }
.vol-more { color: var(--text-muted); font-size: .8rem; padding: .12rem .4rem; }

@media (max-width: 760px) {
  .vs-banner { grid-template-columns: 1fr; }
  .vs-overlap { grid-template-columns: 1fr; }
  .vs-row { grid-template-columns: 1fr; text-align: center !important; }
  .vs-cell-a, .vs-cell-b { text-align: center; }
}

/* Side-by-side language analysis on VS page */
.vs-lang-cols {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
.vs-lang-col {
  background: var(--bg-surface, var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  padding: .85rem;
}
.vlc-h {
  font-weight: 700; color: var(--text);
  margin-bottom: .65rem; padding-bottom: .35rem;
  border-bottom: 1px solid var(--border);
}
.vlc-row {
  display: grid; grid-template-columns: 1fr 2fr .6fr .6fr;
  align-items: center; gap: .5rem;
  padding: .35rem 0; font-size: .88rem;
}
.vlc-name { font-weight: 600; }
.vlc-n, .vlc-rate { font-family: var(--font-mono, monospace); text-align: right; }
@media (max-width: 760px) {
  .vs-lang-cols { grid-template-columns: 1fr; }
}

.vs-actions { text-align: center; margin: 1.25rem 0 2rem; }


/* =========================================================================
   Markdown editor + rendered Markdown styles
   ========================================================================= */

/* Host that wraps a textarea + toolbar + preview */
.md-host {
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
  overflow: hidden;
  background: var(--bg-surface, var(--bg));
}
.md-host textarea.md-textarea {
  border: none !important;
  border-radius: 0 !important;
  resize: vertical;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: .92rem;
  line-height: 1.55;
  padding: .85rem 1rem;
  background: transparent;
  color: var(--text);
  width: 100%;
  outline: none;
}
.md-host textarea.md-textarea:focus { box-shadow: none; }

.md-toolbar {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: .25rem;
  padding: .35rem .5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.md-tb-btn {
  background: transparent;
  color: var(--text-2);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: .25rem .55rem;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.md-tb-btn:hover {
  background: var(--bg-surface, var(--bg));
  color: var(--text);
  border-color: var(--border);
}
.md-tb-spacer { flex: 1; }
.md-tb-cheat, .md-tb-prev {
  font-size: .82rem;
  color: var(--accent);
}

/* Cheatsheet drawer */
.md-cheat {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: .65rem .85rem;
  font-size: .82rem;
  color: var(--text-2);
}
.md-cheat pre {
  margin: 0;
  font-family: var(--font-mono, monospace);
  white-space: pre-wrap;
  background: transparent;
}

/* Live preview */
.md-preview {
  border-top: 1px solid var(--border);
  padding: 1rem 1.1rem;
  background: var(--bg);
  color: var(--text);
  max-height: 500px;
  overflow: auto;
}
.md-preview-empty {
  color: var(--text-muted);
  font-size: .9rem;
  font-style: italic;
}

/* Split view: textarea on the left, preview on the right */
.md-host.md-host-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "tb tb"
    "ta pv";
}
.md-host.md-host-split .md-toolbar { grid-area: tb; }
.md-host.md-host-split textarea.md-textarea {
  grid-area: ta;
  border-right: 1px solid var(--border) !important;
  min-height: 320px;
}
.md-host.md-host-split .md-preview {
  grid-area: pv;
  border-top: none;
  max-height: none;
}
.md-host.md-host-split .md-cheat {
  grid-column: 1 / -1;
}
@media (max-width: 720px) {
  .md-host.md-host-split {
    grid-template-columns: 1fr;
    grid-template-areas:
      "tb"
      "ta"
      "pv";
  }
  .md-host.md-host-split textarea.md-textarea { border-right: none !important; }
  .md-host.md-host-split .md-preview { border-top: 1px solid var(--border); }
}

/* =========================================================================
   Rendered Markdown content (problem statements, forum bodies, previews)
   ========================================================================= */

.md-table-wrap {
  overflow-x: auto;
  margin: .85rem 0;
  border: 1px solid var(--border);
  border-radius: var(--r-md, 10px);
}
table.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
  background: var(--bg-surface, var(--bg));
}
table.md-table thead th {
  background: var(--bg);
  color: var(--text);
  font-weight: 700;
  text-align: left;
  border-bottom: 2px solid var(--border);
  padding: .5rem .75rem;
}
table.md-table tbody td {
  border-bottom: 1px dashed var(--border);
  padding: .45rem .75rem;
  color: var(--text-2);
  vertical-align: top;
}
table.md-table tbody tr:last-child td { border-bottom: none; }
table.md-table tbody tr:hover { background: var(--bg); }

/* Inline / block math wrappers */
.math-inline { display: inline; }
.math-block  { display: block; text-align: center; margin: .8rem 0; overflow-x: auto; }

/* Admonitions (!!! note "..."), produced by the admonition extension */
.admonition {
  border-left: 3px solid var(--accent);
  background: var(--bg-surface, var(--bg));
  padding: .65rem .85rem;
  margin: .8rem 0;
  border-radius: 6px;
}
.admonition.note    { border-left-color: #3b82f6; }
.admonition.warning { border-left-color: #f59e0b; }
.admonition.danger  { border-left-color: #ef4444; }
.admonition.tip, .admonition.success { border-left-color: #10b981; }
.admonition .admonition-title {
  font-weight: 700; margin: 0 0 .25rem;
}

/* Task lists from pymdownx.tasklist */
.task-list-item { list-style: none; }
.task-list-item .task-list-control { margin-right: .5rem; }

/* Keyboard shortcuts from pymdownx.keys */
kbd {
  display: inline-block;
  padding: .1rem .4rem;
  font-family: var(--font-mono, monospace);
  font-size: .82rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--text);
}

/* mark / highlighted text */
mark, .mark { background: rgba(255, 213, 0, .35); color: inherit; padding: 0 .15em; border-radius: 3px; }

/* Footnotes container */
.footnote, .footnotes {
  font-size: .85rem;
  color: var(--text-2);
  border-top: 1px dashed var(--border);
  margin-top: 1.25rem;
  padding-top: .75rem;
}

/* CodeHilite blocks (also used inside .md-preview) */
.codehilite, .highlight {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm, 6px);
  padding: .6rem .8rem;
  overflow-x: auto;
  margin: .6rem 0;
}
.codehilite pre, .highlight pre { margin: 0; background: transparent; }