:root {
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --text: #1c2333;
  --muted: #5b6478;
  --primary: #3d5afe;
  --primary-dark: #2c3fd0;
  --accent: #00c2a8;
  --danger: #e5484d;
  --border: #e3e7f0;
  --shadow: 0 8px 24px rgba(29, 39, 71, 0.08);
  --radius: 14px;
  font-family: "Segoe UI", Roboto, system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg: #10131c;
  --card-bg: #1a1f2e;
  --text: #eef1f8;
  --muted: #9aa3ba;
  --primary: #6f86ff;
  --primary-dark: #8b9dff;
  --accent: #22d3b8;
  --border: #2a3145;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  transition: background .25s ease, color .25s ease;
  min-height: 100vh;
}

a { color: var(--primary); }

h1, h2, h3, h4, h5 { font-weight: 600; }
button, .btn { font-weight: 500; }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* ---------- Admin sidebar layout ---------- */
.admin-layout {
  display: flex;
  align-items: stretch;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  min-width: 240px;
  background: #171b29;
  color: #cdd3e6;
  display: flex;
  flex-direction: column;
  padding: 18px 0;
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}

.admin-sidebar-brand {
  font-weight: 600;
  font-size: 1.05rem;
  color: #fff;
  padding: 4px 20px 20px;
}

.admin-nav-group { margin-bottom: 18px; }

.admin-nav-label {
  text-transform: uppercase;
  font-size: .7rem;
  letter-spacing: .06em;
  color: #6b7392;
  padding: 0 20px 8px;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: transparent;
  border: none;
  border-left: 3px solid transparent;
  color: #cdd3e6;
  text-align: left;
  padding: 10px 20px;
  font-size: .9rem;
  border-radius: 0;
  cursor: pointer;
}
.admin-nav-item span { font-size: 1rem; }
.admin-nav-item:hover { background: rgba(255,255,255,.06); }
.admin-nav-item.active {
  background: rgba(61,90,254,.18);
  border-left-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.admin-sidebar-footer {
  margin-top: auto;
  padding: 14px 20px 4px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  gap: 12px;
}
.admin-sidebar-footer a {
  color: #cdd3e6;
  text-decoration: none;
  font-size: .85rem;
}
.admin-sidebar-footer a:hover { color: #fff; }
.admin-sidebar-footer .theme-toggle { background: rgba(255,255,255,.12); }

.admin-main {
  flex: 1;
  min-width: 0;
  padding: 28px 32px 64px;
  background: var(--bg);
}

@media (max-width: 780px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; min-width: 0; flex-direction: row; flex-wrap: wrap; padding: 10px; position: static; height: auto; overflow-y: visible; }
  .admin-sidebar-brand { display: none; }
  .admin-nav-group { display: flex; flex-wrap: wrap; margin-bottom: 6px; }
  .admin-nav-label { display: none; }
  .admin-nav-item { width: auto; border-left: none; border-radius: 8px; padding: 8px 12px; }
  .admin-nav-item.active { border-left: none; }
  .admin-sidebar-footer { margin-top: 6px; border-top: none; width: 100%; }
  .admin-main { padding: 20px 16px 48px; }
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: var(--shadow);
  flex-wrap: wrap;
  gap: 12px;
}

header.topbar .brand {
  font-weight: 600;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

header.topbar .brand span.badge {
  background: rgba(255,255,255,.25);
  padding: 3px 9px;
  border-radius: 999px;
  font-size: .7rem;
  letter-spacing: .04em;
}

header.topbar nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 16px;
  font-size: .92rem;
  opacity: .9;
}
header.topbar nav a:hover { opacity: 1; text-decoration: underline; }

.theme-toggle {
  background: rgba(255,255,255,.2);
  border: none;
  color: #fff;
  border-radius: 999px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 16px;
}

.hero {
  text-align: center;
  padding: 48px 16px 32px;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
  max-width: 780px;
  margin-inline: auto;
}
.hero p { color: var(--muted); max-width: 640px; margin: 0 auto; }

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 20px;
}

.grid-terms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 16px 0 8px;
}

.term-option {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  background: var(--bg);
  transition: border-color .15s, transform .1s;
  position: relative;
}
.term-option:hover { transform: translateY(-2px); }
.term-option.selected { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(61,90,254,.15); }
.term-option.full { opacity: .55; cursor: not-allowed; }
.term-option h3 { margin: 0 0 6px; font-size: 1rem; }
.term-option .capacity {
  font-size: .82rem;
  color: var(--muted);
}
.term-option .capacity-bar {
  height: 6px;
  border-radius: 4px;
  background: var(--border);
  margin-top: 8px;
  overflow: hidden;
}
.term-option .capacity-bar > div {
  height: 100%;
  background: var(--accent);
}
.term-option .capacity-bar.warn > div { background: #f5a623; }
.term-option .capacity-bar.full > div { background: var(--danger); }

label { display: block; font-weight: 500; font-size: .9rem; margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=tel], input[type=password], input[type=number], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: .95rem;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); }

.rte-toolbar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.rte-toolbar button { padding: 6px 12px; font-size: .85rem; }
.rte-editable {
  width: 100%;
  min-height: 180px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: .95rem;
  overflow-y: auto;
}
.rte-editable:focus { outline: 2px solid var(--primary); }

.checkbox-row, .radio-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  margin: 6px 0;
}
.checkbox-row input, .radio-row input { width: auto; }

fieldset {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 18px 0;
}
fieldset legend { font-weight: 600; padding: 0 6px; }

button, .btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 11px 20px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  font-size: .95rem;
  text-decoration: none;
  transition: background .15s;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button.secondary { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
button.danger { background: var(--danger); }
button:disabled { opacity: .5; cursor: not-allowed; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  margin: 14px 0;
  font-size: .9rem;
}
.alert.error { background: #ffe4e4; color: #9c1c1f; }
.alert.success { background: #dcf7ec; color: #106c53; }
[data-theme="dark"] .alert.error { background: #3a1618; color: #ff9b9e; }
[data-theme="dark"] .alert.success { background: #12352c; color: #6be7c4; }

.code-display {
  font-size: 2.2rem;
  letter-spacing: .3em;
  font-weight: 700;
  text-align: center;
  color: var(--primary);
  background: var(--bg);
  border: 2px dashed var(--primary);
  border-radius: 14px;
  padding: 18px;
  margin: 18px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}
th, td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: normal;
  word-break: break-word;
  vertical-align: top;
}
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; white-space: nowrap; }
tr:hover td { background: rgba(61,90,254,.05); }

tr.row-done td { background: rgba(16,108,83,.08); }
tr.row-partial td { background: rgba(147,101,10,.08); }
tr.row-waitlist td { background: rgba(61,90,254,.08); }
[data-theme="dark"] tr.row-done td { background: rgba(107,231,196,.08); }
[data-theme="dark"] tr.row-partial td { background: rgba(255,207,107,.08); }
[data-theme="dark"] tr.row-waitlist td { background: rgba(139,157,255,.1); }

.waitlist-section {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1.5px dashed var(--primary);
  border-radius: var(--radius);
  background: rgba(61,90,254,.05);
}
.waitlist-section h4 { margin: 0 0 10px; color: var(--primary); font-size: .95rem; }

.admin-notes {
  width: 100%;
  min-height: 44px;
  font-size: .82rem;
  padding: 6px 8px;
}
.row-actions { display: flex; gap: 4px; flex-wrap: wrap; }
.row-actions button { padding: 4px 8px; font-size: .78rem; }

.pie-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}
.pie-box { text-align: center; }
.pie-box h4 { font-size: .82rem; color: var(--muted); margin-bottom: 8px; }
.pie-box canvas { margin: 0 auto; }

.alert-box {
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: .85rem;
  background: #fff3d6;
  color: #93650a;
  border: 1px solid #f5a623;
}
[data-theme="dark"] .alert-box { background: #3a2c0d; color: #ffcf6b; }
.alert-box.urgent { background: #ffe4e4; color: #9c1c1f; border-color: var(--danger); }
[data-theme="dark"] .alert-box.urgent { background: #3a1618; color: #ff9b9e; }

.tabs { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.tabs button {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}
.tabs button.active { background: var(--primary); color: #fff; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.stat-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.stat-box .num { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-box .lbl { color: var(--muted); font-size: .78rem; }

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 22px;
}
.progress-bar > div {
  height: 100%;
  background: var(--accent);
  transition: width .25s;
}

.quiz-question { font-size: 1.1rem; font-weight: 600; margin-bottom: 14px; }
.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 10px;
  cursor: pointer;
  font-size: .95rem;
}
.quiz-option:hover { border-color: var(--primary); }
.quiz-option.picked { border-color: var(--primary); background: rgba(61,90,254,.1); }

.result-hero {
  text-align: center;
  padding: 20px;
}
.result-hero .score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
}

.badge-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
}
.badge-pill.ok { background: #dcf7ec; color: #106c53; }
.badge-pill.pending { background: #fff3d6; color: #93650a; }
[data-theme="dark"] .badge-pill.ok { background: #12352c; color: #6be7c4; }
[data-theme="dark"] .badge-pill.pending { background: #3a2c0d; color: #ffcf6b; }

.search-row { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.search-row input { flex: 1; min-width: 200px; }

.table-wrap { overflow-x: auto; }

footer.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: .82rem;
  padding: 30px 20px;
}

.qr-box { text-align: center; margin: 14px 0; }
.qr-box canvas, .qr-box img { border-radius: 10px; background: #fff; padding: 8px; }

.certificate {
  border: 6px double var(--primary);
  border-radius: 14px;
  padding: 40px;
  text-align: center;
  background: var(--card-bg);
}
.certificate h2 { font-size: 1.6rem; }
.certificate .name { font-size: 1.8rem; font-weight: 700; margin: 14px 0; color: var(--primary); }

.profile-card { max-width: 640px; margin-inline: auto; }
.profile-header { display: flex; align-items: center; gap: 16px; }
.profile-avatar {
  width: 56px;
  height: 56px;
  min-width: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.3rem;
}
.section-group {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.section-group h3 { margin: 0 0 10px; font-size: 1rem; }

@media print {
  header.topbar, footer.site-footer, .no-print { display: none !important; }
}

#attendancePrintArea { display: none; padding: 0 4px 0 0; box-sizing: border-box; }
#attendancePrintArea table { width: 100%; table-layout: fixed; border-collapse: collapse; margin-top: 16px; }
#attendancePrintArea th, #attendancePrintArea td { border: 1px solid #999; padding: 8px; text-align: left; font-size: 13px; word-break: break-word; }
#attendancePrintArea th { background: #eee; }

@media print {
  html:has(body.printing-attendance), body.printing-attendance {
    height: auto !important;
    min-height: 0 !important;
    margin: 0 !important;
  }
  body.printing-attendance > *:not(#attendancePrintArea) { display: none !important; }
  body.printing-attendance #attendancePrintArea {
    display: block;
    color: #000;
    background: #fff;
    min-height: 0;
  }
}