:root {
  --navy: #0f1f4a;
  --cyan: #13b5ea;
  --violet: #7c3aed;
  --gold: #f59e0b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Sarabun', sans-serif;
  background: linear-gradient(180deg, #dff4ff 0%, #eef8ff 45%, #f8fbff 100%);
  min-height: 100vh;
  overflow-x: hidden;
}
.clouds { position: fixed; inset: 0; overflow: hidden; pointer-events: none; z-index: -1; }
.clouds span { position: absolute; width: 260px; height: 80px; background: rgba(255,255,255,.65); border-radius: 999px; filter: blur(1px); animation: cloudMove 28s linear infinite; }
.clouds span::before,.clouds span::after { content:''; position:absolute; background:inherit; border-radius:50%; }
.clouds span::before { width:100px;height:100px;left:45px;top:-45px; }
.clouds span::after { width:130px;height:130px;right:35px;top:-65px; }
.clouds span:nth-child(1){top:12%;left:-280px;animation-duration:32s}.clouds span:nth-child(2){top:42%;left:-360px;animation-duration:40s;animation-delay:-12s}.clouds span:nth-child(3){top:74%;left:-300px;animation-duration:35s;animation-delay:-20s}
@keyframes cloudMove { to { transform: translateX(calc(100vw + 700px)); } }
.glass-card { background: rgba(255,255,255,.7); backdrop-filter: blur(16px); border: 1px solid rgba(255,255,255,.8); box-shadow: 0 18px 50px rgba(30,64,175,.10); border-radius: 24px; }
.glass-dark { background: rgba(255,255,255,.12); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,.14); border-radius: 18px; }
.app-shell { display:flex; min-height:100vh; }
.sidebar { width: 285px; position:fixed; left:0; top:0; bottom:0; padding:22px 16px; background: linear-gradient(180deg, #102153 0%, #172554 52%, #27105b 100%); color:#fff; z-index:30; overflow-y:auto; transition:.25s ease; box-shadow: 10px 0 40px rgba(15,23,42,.15); }
.sidebar-brand { display:flex; gap:12px; align-items:center; margin-bottom:18px; }
.brand-mark { width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,#38bdf8,#8b5cf6);font-size:25px;box-shadow:0 10px 25px rgba(56,189,248,.3)}
.sidebar-brand strong { display:block; font-weight:800; font-size:16px; }
.sidebar-brand small { display:block; opacity:.75; line-height:1.25; margin-top:3px; }
.sidebar-profile { display:flex;align-items:center;gap:12px;padding:13px;margin-bottom:16px; }
.avatar-circle { width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#172554;font-size:20px;font-weight:800; }
.sidebar-nav { display:grid; gap:6px; }
.nav-item { width:100%; display:flex; align-items:center; gap:11px; padding:11px 13px; border-radius:14px; color:#eaf3ff; text-decoration:none; border:0; background:transparent; cursor:pointer; font:inherit; text-align:left; transition:.2s; }
.nav-item:hover,.nav-item.active { transform:translateX(4px); background:rgba(255,255,255,.14); box-shadow:inset 3px 0 #38bdf8; }
.nav-item.locked { opacity:.48; cursor:not-allowed; }
.nav-item.logout { margin-top:12px; color:#fecaca; }
.main-content { margin-left:285px; width:calc(100% - 285px); min-height:100vh; }
.topbar { margin:18px 24px 0; padding:18px 22px; display:flex;justify-content:space-between;align-items:center; }
.page-wrap { padding:24px; max-width:1500px; margin:0 auto; }
.site-footer { padding:24px; text-align:center; color:#64748b; font-size:14px; }
.site-footer.standalone { position:relative; }
.mobile-menu-btn { display:none; position:fixed; top:14px;left:14px;z-index:50;width:44px;height:44px;border:0;border-radius:14px;background:#172554;color:white;font-size:22px;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.hero-gradient { background:linear-gradient(135deg,#0f2c6e,#155eaa 48%,#6d28d9); color:#fff; border-radius:28px; padding:28px; box-shadow:0 24px 65px rgba(30,64,175,.24); position:relative;overflow:hidden; }
.hero-gradient::after { content:'';position:absolute;inset:-80% -30%;background:linear-gradient(110deg,transparent 38%,rgba(255,255,255,.25) 50%,transparent 62%);transform:translateX(-60%);animation:shine 5s infinite; }
@keyframes shine { 0%,65%{transform:translateX(-60%)} 100%{transform:translateX(70%)} }
.card-lift { transition:.22s ease; }
.card-lift:hover { transform:translateY(-6px); box-shadow:0 24px 55px rgba(15,23,42,.14); }
.section-card { border-radius:22px; padding:22px; background:rgba(255,255,255,.82); border:1px solid rgba(255,255,255,.9); box-shadow:0 15px 45px rgba(30,64,175,.09); }
.btn-primary,.btn-secondary,.btn-gold,.btn-danger { border:0;border-radius:14px;padding:11px 18px;font-weight:700;cursor:pointer;transition:.2s;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px; }
.btn-primary { background:linear-gradient(135deg,#0ea5e9,#2563eb);color:white;box-shadow:0 10px 24px rgba(37,99,235,.25) }
.btn-secondary { background:#eef2ff;color:#4338ca; }
.btn-gold { background:linear-gradient(135deg,#f59e0b,#f97316);color:white;box-shadow:0 10px 24px rgba(245,158,11,.22) }
.btn-danger { background:#fee2e2;color:#b91c1c; }
.btn-primary:hover,.btn-secondary:hover,.btn-gold:hover,.btn-danger:hover { transform:translateY(-2px) scale(1.01); }
.progress-track { height:12px;border-radius:999px;background:#e2e8f0;overflow:hidden; }
.progress-bar { height:100%;border-radius:inherit;background:linear-gradient(90deg,#22c55e,#06b6d4,#6366f1);transition:width .5s ease; }
.badge-pill { display:inline-flex;align-items:center;gap:6px;padding:7px 11px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-weight:700;font-size:13px; }
.law-card { position:relative;overflow:hidden; }
.law-card::before { content:''; position:absolute; inset:-100% auto -100% -45%; width:35%; background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent); transform:skewX(-18deg); animation:cardShine 6s infinite; }
@keyframes cardShine { 0%,70%{left:-45%}100%{left:125%} }
.quiz-option { width:100%;text-align:left;border:2px solid #dbeafe;border-radius:16px;padding:14px 16px;background:#fff;transition:.18s;cursor:pointer; }
.quiz-option:hover { border-color:#38bdf8;transform:translateY(-2px);box-shadow:0 12px 30px rgba(56,189,248,.15); }
.quiz-option.selected { border-color:#2563eb;background:#eff6ff; }
.evidence-card { border:2px solid #dbeafe;border-radius:18px;padding:16px;background:#fff;cursor:pointer;transition:.2s; }
.evidence-card:hover { transform:translateY(-4px);border-color:#38bdf8; }
.evidence-card.selected { border-color:#10b981;background:#ecfdf5;box-shadow:0 0 0 4px rgba(16,185,129,.12); }
.timer-circle { width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(#2563eb var(--timer,100%),#e2e8f0 0);position:relative; }
.timer-circle::after { content:'';position:absolute;width:56px;height:56px;border-radius:50%;background:white; }
.timer-circle span { z-index:1;font-weight:800;color:#1e3a8a; }
.loading-overlay { position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(5px);display:grid;place-items:center;z-index:100; }
.loading-card { background:white;padding:24px 30px;border-radius:20px;box-shadow:0 24px 80px rgba(0,0,0,.25);text-align:center; }
.spinner { width:42px;height:42px;border:5px solid #dbeafe;border-top-color:#2563eb;border-radius:50%;margin:0 auto 12px;animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }
.login-page { min-height:100vh;display:grid;place-items:center;padding:24px; }
.login-grid { width:min(1080px,100%);display:grid;grid-template-columns:1.08fr .92fr;overflow:hidden;border-radius:30px;box-shadow:0 30px 90px rgba(30,64,175,.18); }
.login-hero { padding:42px;background:linear-gradient(145deg,#102153,#155eaa 50%,#6d28d9);color:white;position:relative;overflow:hidden; }
.login-form { padding:38px;background:rgba(255,255,255,.88);backdrop-filter:blur(20px); }
.field-label { display:block;font-weight:700;margin:0 0 6px;color:#334155; }
.field-input,.field-select,.field-textarea { width:100%;border:1px solid #cbd5e1;border-radius:14px;padding:11px 13px;background:white;outline:none;transition:.2s; }
.field-input:focus,.field-select:focus,.field-textarea:focus { border-color:#38bdf8;box-shadow:0 0 0 4px rgba(56,189,248,.13); }
.table-wrap { overflow:auto;border-radius:18px; }
.data-table { width:100%;border-collapse:collapse;background:white; }
.data-table th { background:#e0f2fe;color:#0c4a6e;text-align:left;padding:12px;white-space:nowrap; }
.data-table td { padding:12px;border-top:1px solid #e2e8f0; }
.rank-1 { background:#fff8db; }.rank-2 { background:#f5f7fa; }.rank-3 { background:#fff0e6; }
@media (max-width: 960px) {
  .sidebar { transform:translateX(-105%); }
  .sidebar.open { transform:translateX(0); }
  .main-content { margin-left:0;width:100%; }
  .mobile-menu-btn { display:block; }
  .topbar { margin-left:68px; }
  .login-grid { grid-template-columns:1fr; }
  .login-hero { padding:30px; }
}
@media (max-width: 640px) {
  .page-wrap { padding:16px; }
  .topbar { margin:12px 12px 0 64px;padding:14px; }
  .hero-gradient { padding:22px; }
  .login-form { padding:24px; }
}
.quiz-choice { width:100%;text-align:left;border:2px solid #dbeafe;border-radius:18px;padding:15px 17px;background:#fff;transition:.18s;cursor:pointer;display:flex;align-items:flex-start;gap:12px;font:inherit;color:#1e293b; }
.quiz-choice:hover { border-color:#38bdf8;transform:translateY(-2px);box-shadow:0 12px 30px rgba(56,189,248,.15); }
.quiz-choice.selected { border-color:#2563eb;background:#eff6ff;box-shadow:0 0 0 4px rgba(37,99,235,.10); }
.choice-letter { flex:0 0 34px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#dbeafe;color:#1d4ed8;font-weight:800; }
.quiz-choice.selected .choice-letter { background:#2563eb;color:#fff; }
button:disabled { opacity:.5;cursor:not-allowed;transform:none!important; }
.whitespace-pre-wrap { white-space:pre-wrap; }