/* ============================================================
   KursusKu — tema "Learning Boarding Pass"
   Materi = tiket, kuis lulus = stempel tinta, progres = perjalanan.
   ============================================================ */

:root {
  --paper: #EEF1F6;        /* latar utama, kertas biru-abu dingin */
  --surface: #FFFFFF;      /* permukaan kartu */
  --ink: #101C34;          /* teks utama, navy tinta */
  --ink-soft: #5B6478;     /* teks sekunder */
  --line: #DBE1EA;         /* garis solid halus */
  --line-strong: #C3CBDA;

  --teal: #0B6E6E;         /* aksi utama */
  --teal-dark: #084F4F;
  --teal-tint: #E3F1F1;

  --crimson: #B23A2E;      /* stempel / aksen kuat */
  --crimson-tint: #FBEAE8;

  --gold: #B8860B;         /* highlight sekunder */
  --gold-tint: #FBF3DD;

  --success: #1F8A5F;
  --success-tint: #E4F5EC;
  --danger: #B23A2E;
  --danger-tint: #FBEAE8;

  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 8px;

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(16,28,52,0.05) 1px, transparent 0);
  background-size: 22px 22px;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}
h1 { font-size: 1.9rem; font-weight: 700; }
h2 { font-size: 1.3rem; font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 600; }

code {
  font-family: var(--font-mono);
  background: var(--teal-tint);
  color: var(--teal-dark);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ===== Topbar ===== */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 14px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav-link {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink-soft);
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: var(--teal-tint); color: var(--teal-dark); }
.nav-link.active { background: var(--teal); color: white; }
.user-name {
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin-left: 10px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

/* ===== Layout ===== */
main { max-width: 980px; margin: 0 auto; padding: 36px 20px 80px; }
.subtitle { color: var(--ink-soft); margin-top: 0; margin-bottom: 26px; font-size: 0.98rem; }
.status-msg {
  background: var(--success-tint);
  color: var(--success);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border-left: 3px solid var(--success);
}

/* ===== Buttons ===== */
.btn-primary {
  background: var(--teal);
  color: white;
  border: none;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--teal-dark); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { background: #A8B2C2; cursor: not-allowed; }

.btn-outline {
  background: var(--surface);
  border: 1.5px solid var(--line-strong);
  color: var(--ink);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.15s, color 0.15s;
}
.btn-outline:hover { border-color: var(--teal); color: var(--teal-dark); }

.btn-link {
  background: none;
  border: none;
  color: var(--teal-dark);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0;
  margin-bottom: 18px;
  text-decoration: none;
  display: inline-block;
}
.btn-link:hover { text-decoration: underline; }

/* ===== Auth (kartu bergaya tiket) ===== */
.auth-card {
  max-width: 400px;
  margin: 48px auto;
  background: var(--surface);
  padding: 8px;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 30px rgba(16,28,52,0.09);
  position: relative;
}
.tabs {
  display: flex;
  margin: 8px 8px 22px;
  padding-bottom: 14px;
  border-bottom: 2px dashed var(--line-strong);
}
.tab-btn {
  flex: 1;
  text-align: center;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  text-decoration: none;
}
.tab-btn.active { color: white; background: var(--teal); }

.auth-form { display: flex; flex-direction: column; gap: 6px; padding: 0 20px 20px; }
.auth-form label { font-size: 0.82rem; font-weight: 600; color: var(--ink-soft); margin-top: 10px; }
.auth-form input,
.auth-form textarea,
.auth-form select {
  padding: 11px 13px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
}
.auth-form input:focus,
.auth-form textarea:focus,
.auth-form select:focus {
  outline: none;
  border-color: var(--teal);
  background: var(--surface);
}
.auth-form button { margin-top: 22px; }
.form-msg { font-size: 0.87rem; color: var(--crimson); font-weight: 500; margin: 4px 20px; }

/* ===== Materi cards: gaya boarding pass ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 22px; }

.materi-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  text-decoration: none;
  color: var(--ink);
  display: block;
  box-shadow: 0 2px 10px rgba(16,28,52,0.05);
  transition: transform 0.15s, box-shadow 0.15s;
}
.materi-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(16,28,52,0.12);
}
.materi-card-locked {
  cursor: not-allowed;
  opacity: 0.6;
  background: var(--paper);
}
.materi-card-locked:hover { transform: none; box-shadow: 0 2px 10px rgba(16,28,52,0.05); }
.materi-card h3 { margin: 0 0 10px; padding-right: 10px; }

/* nomor materi -> jadi label tiket mono, garis putus-putus perforasi di bawahnya */
.materi-card p {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 2px dashed var(--line-strong);
  position: relative;
}
/* lubang perforasi di kedua ujung garis putus-putus, meniru sobekan tiket */
.materi-card p::before,
.materi-card p::after {
  content: '';
  position: absolute;
  bottom: -7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--line);
}
.materi-card p::before { left: -22px; }
.materi-card p::after { right: -22px; }

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.badge.pending { background: var(--gold-tint); color: var(--gold); border: 1px solid transparent; }
/* badge "lulus" jadi stempel tinta berputar */
.badge.done {
  background: transparent;
  color: var(--crimson);
  border: 2px solid var(--crimson);
  transform: rotate(-5deg);
  padding: 6px 14px;
  font-weight: 700;
}

/* ===== Materi detail ===== */
.materi-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 800px) { .materi-layout { grid-template-columns: 1fr; } }

.video-wrap {
  position: relative;
  padding-top: 56.25%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink);
  margin-bottom: 14px;
  box-shadow: 0 8px 24px rgba(16,28,52,0.15);
}
.video-wrap iframe { position: absolute; top:0; left:0; width:100%; height:100%; border:0; }

.pdf-link { margin-top: 12px; }

.materi-quiz {
  background: var(--surface);
  padding: 22px;
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 10px rgba(16,28,52,0.05);
  border: 1px solid var(--line);
}
.lock-msg {
  color: var(--ink-soft);
  font-size: 0.9rem;
  background: var(--paper);
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1.5px dashed var(--line-strong);
}

.question-block { margin-bottom: 20px; padding-bottom: 18px; border-bottom: 1px dashed var(--line-strong); }
.question-block:last-child { border-bottom: none; }
.question-block p.q-text { font-weight: 600; margin-bottom: 12px; color: var(--ink); }
.option-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  margin-bottom: 4px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.12s;
}
.option-row:hover { background: var(--teal-tint); }
.option-row input { cursor: pointer; accent-color: var(--teal); }

.quiz-result {
  margin-top: 16px;
  padding: 15px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.92rem;
}
.quiz-result.pass { background: var(--success-tint); color: var(--success); border-left: 3px solid var(--success); }
.quiz-result.fail { background: var(--danger-tint); color: var(--danger); border-left: 3px solid var(--danger); }

/* ===== Latihan ===== */
.riwayat-list { margin-top: 10px; }
.riwayat-item {
  background: var(--surface);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  border: 1px solid var(--line);
}
.riwayat-item span:first-child { font-weight: 600; color: var(--ink); }
.riwayat-item span:last-child { font-family: var(--font-mono); color: var(--ink-soft); font-size: 0.8rem; }

/* ===== Admin ===== */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(16,28,52,0.05);
  border: 1px solid var(--line);
}
.admin-table th, .admin-table td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}
.admin-table th {
  background: var(--paper);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--ink-soft);
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--teal-tint); }
.table-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: white; border-color: var(--danger); }

.quiz-admin-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-bottom: 14px;
  box-shadow: 0 2px 8px rgba(16,28,52,0.05);
}
.quiz-admin-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-strong);
}
.quiz-admin-options { list-style: none; padding: 0; margin: 0; font-size: 0.88rem; color: var(--ink-soft); }
.quiz-admin-options li { padding: 4px 0; }
.quiz-admin-options li.correct { color: var(--success); font-weight: 700; }

.timer-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--teal-tint);
  color: var(--teal-dark);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  border: 1.5px solid var(--teal);
}
.timer-badge.timer-warning {
  background: var(--crimson-tint);
  color: var(--crimson);
  border-color: var(--crimson);
}

.stat-strip {
  display: flex;
  gap: 16px;
  align-items: stretch;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.stat-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 22px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 140px;
}
.stat-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal-dark);
}

.set-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 2px dashed var(--line-strong);
  padding-bottom: 14px;
}
.set-tab {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
}
.set-tab.active { background: var(--teal); color: white; border-color: var(--teal); }

/* Leaderboard inline di kartu latihan, pakai <details>/<summary> native (tanpa JS) */
.leaderboard-toggle { margin-top: 14px; }
.leaderboard-toggle summary {
  cursor: pointer;
  list-style: none;
  display: inline-block;
}
.leaderboard-toggle summary::-webkit-details-marker { display: none; }
.leaderboard-toggle summary::marker { content: ''; }

.leaderboard-inline {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 2px dashed var(--line-strong);
}
.leaderboard-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.leaderboard-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}
.leaderboard-list li.me { background: var(--gold-tint); font-weight: 700; }
.lb-rank { width: 22px; text-align: center; flex-shrink: 0; }
.lb-name { flex: 1; color: var(--ink); }
.lb-score { font-family: var(--font-mono); font-weight: 700; color: var(--teal-dark); }

/* ===== Scrollbar tipis biar konsisten dengan tema kertas ===== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 999px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Hamburger: disembunyikan di desktop, checkbox-hack tanpa JS */
.nav-toggle-checkbox { display: none; }
.nav-toggle-label {
  display: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--ink);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  line-height: 1;
}
.nav-toggle-label:hover { background: var(--teal-tint); }

@media (max-width: 860px) {
  .topbar { flex-wrap: wrap; padding: 12px 18px; position: relative; }
  .nav-toggle-label { display: block; }

  .nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 10px 14px 16px;
    box-shadow: 0 12px 24px rgba(16,28,52,0.10);
    gap: 2px;
  }
  .nav-toggle-checkbox:checked ~ .nav { display: flex; }

  .nav-link { width: 100%; text-align: left; padding: 12px 14px; }
  .user-name {
    margin: 8px 0 0;
    padding: 12px 0 0;
    border-left: none;
    border-top: 1px dashed var(--line-strong);
    width: 100%;
  }
  .nav > a.btn-outline { margin-top: 8px; text-align: center; }
}

@media (max-width: 640px) {
  main { padding: 24px 14px 60px; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.15rem; }

  .auth-card { margin: 24px auto; max-width: 100%; }
  .card-grid { grid-template-columns: 1fr; gap: 16px; }

  .materi-card p::before,
  .materi-card p::after { display: none; } /* lubang perforasi butuh ruang di kanan-kiri, disembunyikan di layar sempit */

  .quiz-admin-head { flex-direction: column; align-items: stretch; gap: 10px; }
  .table-actions { flex-wrap: wrap; }

  .admin-table { display: block; overflow-x: auto; white-space: nowrap; border-radius: var(--radius); }
  .admin-table th, .admin-table td { padding: 10px 12px; }

  .video-wrap { border-radius: var(--radius); }
}

@media (max-width: 420px) {
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
  .table-actions .btn-outline, .table-actions .btn-primary { width: auto; }
}