/* ABC School Examination Portal — styling ported from the AI-LMS look.
   Palette: primary teal #006767, sidebar #142541, accent orange #ff9d26.
   Self-contained (no Tailwind/CDN) so it works offline on shared hosting. */

:root {
  --primary: #006767;
  --primary-600: #005858;
  --primary-700: #004a4a;
  --primary-100: #cfe6e6;
  --accent: #ff9d26;
  --sidebar: #142541;
  --sidebar-active: rgba(255, 255, 255, 0.12);
  --bg: #f7f9fb;
  --card: #ffffff;
  --ink: #142541;
  --muted: #64748b;
  --border: #e6eaf0;
  --good: #16a34a;
  --bad: #dc2626;
  --warn: #d97706;
  --radius: 14px;
  --radius-btn: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}
h1, h2, h3, .display { font-family: 'Manrope', 'Inter', sans-serif; letter-spacing: -.01em; }
a { color: var(--primary); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 10px 18px; border-radius: var(--radius-btn); border: 1px solid transparent;
  font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none;
  transition: box-shadow .15s, transform .05s, background .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(135deg, var(--primary), #1c8f8f); color: #fff; }
.btn-primary:hover { box-shadow: 0 6px 18px rgba(0,103,103,.35); }
.btn-secondary { background: #fff; color: var(--primary-700); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--primary); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-danger { background: var(--bad); color: #fff; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------- Inputs ---------- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: #334155; }
.input, select.input, textarea.input {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-btn);
  border: 1px solid var(--border); background: #f2f4f6; color: var(--ink); font: inherit;
  outline: none; transition: box-shadow .15s, border-color .15s, background .15s;
}
.input:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,103,103,.15); }

/* ---------- Cards ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-pad { padding: 20px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.stat .num { font-size: 28px; font-weight: 800; font-family: 'Manrope', sans-serif; color: var(--primary-700); }
.stat .lbl { color: var(--muted); font-size: 13px; }

/* ---------- Chips / badges ---------- */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px;
  background: var(--primary-100); color: var(--primary-700); font-size: 12px; font-weight: 600; }
.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; text-transform: capitalize; }
.badge-good { background: #dcfce7; color: var(--good); }
.badge-bad { background: #fee2e2; color: var(--bad); }
.badge-warn { background: #fef3c7; color: var(--warn); }
.badge-muted { background: #eef2f7; color: var(--muted); }
.badge-primary { background: var(--primary-100); color: var(--primary-700); }

/* ---------- Tables ---------- */
.table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; }
.table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .04em;
  color: var(--muted); padding: 12px 16px; background: #f8fafc; border-bottom: 1px solid var(--border); }
.table td { padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 14px; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: #fafcff; }

/* ---------- App shell ---------- */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 256px; background: var(--sidebar); color: #fff; padding: 22px 16px;
  position: fixed; inset: 0 auto 0 0; display: flex; flex-direction: column; gap: 6px; z-index: 20;
}
.sidebar .brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; }
.sidebar .brand img { width: 38px; height: 38px; }
.sidebar .brand b { font-family: 'Manrope', sans-serif; font-size: 17px; }
.sidebar .brand small { display: block; color: #9fb3c8; font-size: 11px; font-weight: 500; }
.nav-link {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px;
  color: #cbd5e1; text-decoration: none; font-weight: 500; font-size: 14px;
}
.nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-link.active { background: var(--sidebar-active); color: #fff; }
.sidebar .spacer { flex: 1; }

.main { margin-left: 256px; flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 62px; background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 16px; padding: 0 24px; position: sticky; top: 0; z-index: 10;
}
.topbar .title { font-weight: 700; font-family: 'Manrope', sans-serif; font-size: 18px; }
.topbar .grow { flex: 1; }
.userchip { display: flex; align-items: center; gap: 10px; }
.avatar { width: 36px; height: 36px; border-radius: 999px; background: var(--primary-100);
  color: var(--primary-700); display: grid; place-items: center; font-weight: 700; }
.content { padding: 24px; }

.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid-4 { grid-template-columns: repeat(2,1fr); } .grid-3,.grid-2 { grid-template-columns: 1fr; } }

.section-title { font-size: 16px; font-weight: 700; margin: 4px 0 12px; font-family: 'Manrope', sans-serif; }
.row { display: flex; align-items: center; gap: 12px; }
.between { justify-content: space-between; }
.muted { color: var(--muted); }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .input { width: auto; min-width: 180px; }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(1200px 600px at 50% -10%, #e7f4f4, var(--bg)); }
.login-card { width: 100%; max-width: 420px; }
.login-card .brand-head { text-align: center; margin-bottom: 22px; }
.login-card .brand-head img { width: 64px; height: 64px; }
.login-card h1 { margin: 12px 0 2px; font-size: 24px; }
.login-card .sub { color: var(--muted); font-size: 14px; }
.demo-creds { margin-top: 18px; border-top: 1px dashed var(--border); padding-top: 16px; }
.demo-creds .dc-row { display: flex; gap: 8px; align-items: center; justify-content: space-between;
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; background: #fbfdff; }
.demo-creds .dc-row b { font-size: 13px; }
.demo-creds .dc-row span { font-size: 12px; color: var(--muted); }

/* ---------- Modal ---------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: none;
  place-items: center; z-index: 50; padding: 24px; }
.modal-backdrop.open { display: grid; }
.modal { background: #fff; border-radius: var(--radius); width: 100%; max-width: 560px;
  box-shadow: var(--shadow); max-height: 90vh; overflow: auto; }
.modal header { padding: 18px 20px; border-bottom: 1px solid var(--border); font-weight: 700; font-family: 'Manrope', sans-serif; }
.modal .body { padding: 20px; }
.modal footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ---------- Toast ---------- */
#toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 10px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 100; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }

/* ---------- Exam attempt screen (AI-LMS faithful, blue accent) ---------- */
:root {
  --blue-50:#eff6ff; --blue-100:#dbeafe; --blue-200:#bfdbfe; --blue-400:#60a5fa;
  --blue-500:#3b82f6; --blue-600:#2563eb; --blue-700:#1d4ed8;
  --green-500:#10b981; --amber-400:#fbbf24; --red-300:#fca5a5; --red-500:#ef4444; --red-600:#dc2626;
  --g50:#f9fafb; --g100:#f3f4f6; --g200:#e5e7eb; --g300:#d1d5db; --g400:#9ca3af; --g500:#6b7280; --g700:#374151; --g900:#111827;
}
.exam-shell { min-height: 100vh; display: flex; flex-direction: column; background: var(--g50); }

/* Header */
.ex-header { background:#fff; border-bottom:1px solid var(--g200); padding:10px 24px;
  display:flex; align-items:center; gap:16px; position:sticky; top:0; z-index:10; }
.ex-brand { display:flex; align-items:center; gap:10px; }
.ex-brand img { width:36px; height:36px; border-radius:9px; }
.ex-brand b { font-family:'Manrope',sans-serif; font-size:15px; line-height:1.1; display:block; }
.ex-brand small { color:var(--g400); font-size:12px; }
.ex-timer { display:flex; align-items:center; gap:8px; border:2px solid var(--blue-400); background:var(--blue-50);
  border-radius:10px; padding:6px 14px; font-family:'Manrope',ui-monospace,monospace; }
.ex-timer .t { font-size:18px; font-weight:800; color:var(--blue-700); letter-spacing:.02em; }
.ex-timer.warn { border-color:var(--red-500); background:#fef2f2; animation:pulse 1.2s infinite; }
.ex-timer.warn .t { color:var(--red-600); }
@keyframes pulse { 50% { opacity:.55; } }
.ex-submit { background:var(--red-500); color:#fff; border:none; border-radius:9px; padding:9px 18px;
  font-weight:700; font-size:14px; cursor:pointer; }
.ex-submit:hover { background:var(--red-600); }

/* Progress + sub bar */
.ex-progress { height:4px; background:var(--g200); }
.ex-progress > i { display:block; height:100%; background:var(--blue-500); transition:width .25s; }
.ex-subbar { background:var(--g50); border-bottom:1px solid var(--g200); padding:7px 24px;
  display:flex; align-items:center; gap:18px; font-size:12px; color:var(--g500); flex-wrap:wrap; }
.ex-legend-dot { display:inline-flex; align-items:center; gap:6px; }
.ex-legend-dot i { width:10px; height:10px; border-radius:3px; display:inline-block; }

/* Two-column body */
.ex-main { flex:1; display:grid; grid-template-columns:1fr 230px; align-items:start; }
@media (max-width:820px){ .ex-main { grid-template-columns:1fr; } }
.ex-qarea { padding:24px; max-width:760px; margin:0 auto; width:100%; }
.ex-card { background:#fff; border:1px solid var(--g200); border-radius:16px; padding:24px; box-shadow:0 2px 8px rgba(25,28,30,.04); }
.ex-badge-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.qnum-badge { background:var(--blue-50); color:var(--blue-700); border:1px solid var(--blue-100);
  font-size:12px; font-weight:700; padding:4px 12px; border-radius:999px; }
.qmarks { font-size:12px; color:var(--g400); background:var(--g50); border:1px solid var(--g200); padding:4px 10px; border-radius:999px; }
.ex-qtext { font-size:15px; font-weight:600; color:var(--g900); white-space:pre-wrap; margin-bottom:20px; line-height:1.55; }
.ex-opt { display:flex; align-items:center; gap:12px; width:100%; text-align:left; padding:13px 16px;
  border:2px solid var(--g200); background:var(--g50); border-radius:12px; margin-bottom:10px; cursor:pointer;
  transition:background .12s, border-color .12s; font:inherit; }
.ex-opt:hover { background:var(--blue-50); border-color:var(--blue-200); }
.ex-opt.sel { background:var(--blue-50); border-color:var(--blue-500); box-shadow:0 1px 4px var(--blue-100); }
.ex-opt-letter { min-width:24px; height:24px; display:grid; place-items:center; border-radius:6px;
  background:var(--g200); color:var(--g500); font-size:12px; font-weight:700; flex:none; }
.ex-opt.sel .ex-opt-letter { background:var(--blue-500); color:#fff; }
.ex-opt-text { flex:1; font-size:14px; color:var(--g900); }
.ex-opt-check { color:var(--blue-500); font-weight:800; }

/* Palette */
.ex-palette { background:#fff; border-left:1px solid var(--g200); padding:18px 16px; min-height:100%; position:sticky; top:0; }
.ex-palette h4 { font-size:11px; text-transform:uppercase; letter-spacing:.06em; color:var(--g400); margin:0 0 12px; }
.ex-pal-grid { display:grid; grid-template-columns:repeat(5,1fr); gap:7px; }
.pal-cell { aspect-ratio:1; border-radius:7px; border:none; font-size:12px; font-weight:700; cursor:pointer;
  display:grid; place-items:center; background:var(--g200); color:var(--g700); }
.pal-cell.pans { background:var(--green-500); color:#fff; }
.pal-cell.pmark { background:var(--amber-400); color:#fff; }
.pal-cell.pvisit { background:var(--red-300); color:#7f1d1d; }
.pal-cell.pcur { background:var(--blue-500); color:#fff; box-shadow:0 0 0 3px var(--blue-200); }
.ex-legend { border-top:1px solid var(--g100); margin-top:16px; padding-top:14px; display:flex; flex-direction:column; gap:8px; font-size:12px; color:var(--g500); }

/* Footer nav */
.ex-footer { background:#fff; border-top:1px solid var(--g200); padding:14px 24px; display:flex;
  align-items:center; justify-content:space-between; gap:12px; position:sticky; bottom:0; }
.ex-btn { padding:9px 18px; border-radius:10px; font-size:14px; font-weight:600; cursor:pointer; border:1px solid var(--g200); background:#fff; color:var(--g700); }
.ex-btn:disabled { opacity:.4; cursor:not-allowed; }
.ex-btn-prev { color:var(--g500); }
.ex-btn-clear { color:var(--g400); }
.ex-btn-mark { border-color:var(--amber-400); color:#b45309; background:#fff; }
.ex-btn-mark.on { background:#fffbeb; border-color:var(--amber-400); }
.ex-btn-next { background:var(--blue-500); color:#fff; border-color:var(--blue-500); }
.ex-btn-next:hover { background:var(--blue-600); }

/* Anti-cheat warning modal + save toast */
.ac-overlay { position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:60; display:none; place-items:center; padding:24px; }
.ac-overlay.show { display:grid; }
.ac-modal { background:#fff; border:2px solid var(--amber-400); border-radius:16px; padding:24px; max-width:420px; width:100%; text-align:center; }
.ac-modal.danger { border-color:var(--red-500); }
.ac-modal h3 { margin:0 0 8px; font-size:17px; color:#b45309; font-family:'Manrope',sans-serif; }
.ac-modal.danger h3 { color:var(--red-600); }
.ac-modal p { font-size:14px; color:var(--g700); margin:0 0 6px; }
.ac-modal .cd { font-size:12px; color:var(--g400); }
.save-toast { position:fixed; bottom:18px; left:18px; background:#fff; border:1px solid #bbf7d0; color:#15803d;
  padding:8px 14px; border-radius:999px; box-shadow:0 4px 14px rgba(0,0,0,.08); font-size:13px; font-weight:600;
  opacity:0; transform:translateY(6px); transition:.2s; z-index:70; }
.save-toast.show { opacity:1; transform:translateY(0); }

/* ---------- Scorecard ---------- */
.score-hero { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.score-ring { width: 130px; height: 130px; border-radius: 999px; display: grid; place-items: center;
  font-family: 'Manrope', sans-serif; color: #fff; }
.score-ring .pct { font-size: 30px; font-weight: 800; }
.bd-item { display: flex; gap: 12px; padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; }
.bd-dot { width: 10px; height: 10px; border-radius: 999px; margin-top: 6px; flex: none; }
.text-good { color: var(--good); } .text-bad { color: var(--bad); } .text-muted { color: var(--muted); }
.hidden { display: none !important; }