/* ===================================================================
   E-learning portal: extends style.css with course cards, progress
   bars, the lesson player layout, quiz UI, and admin tables.
   =================================================================== */

/* ---------- Course catalog ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-chip {
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.filter-chip:hover {
  border-color: var(--glow-purple);
  color: var(--ink);
}

.filter-chip.is-active {
  background: linear-gradient(100deg, var(--gold-500), var(--glow-purple));
  border-color: transparent;
  color: #1a0f06;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

@media (max-width: 980px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .course-grid {
    grid-template-columns: 1fr;
  }
}

.course-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(16px);
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.course-card:hover {
  transform: translateY(-4px);
  border-color: rgba(163, 91, 239, 0.4);
  box-shadow: var(--shadow-glow-purple);
}

.course-card .course-band {
  height: 8px;
  background: linear-gradient(90deg, var(--gold-500), var(--glow-purple), var(--glow-blue));
}

.course-card .course-body {
  padding: 26px 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-card .course-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.course-card h3 {
  font-size: 1.12rem;
  margin-bottom: 10px;
}

.course-card p {
  font-size: 0.92rem;
  flex: 1;
}

.course-card .course-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.82rem;
  color: var(--ink-faint);
}

/* ---------- Progress ---------- */
.progress-track {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-hi);
  overflow: hidden;
  border: 1px solid var(--line);
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold-500), var(--glow-purple));
  transition: width 0.5s var(--ease);
}

/* ---------- Dashboard ---------- */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 900px) {
  .dash-grid {
    grid-template-columns: 1fr;
  }
}

.dash-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(16px);
}

.dash-card h3 {
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.dash-empty {
  padding: 48px 24px;
  text-align: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink-faint);
}

/* ---------- Lesson player ---------- */
.player-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 0;
  min-height: 60vh;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  backdrop-filter: blur(16px);
}

@media (max-width: 860px) {
  .player-shell {
    grid-template-columns: 1fr;
  }
}

.player-sidebar {
  border-right: 1px solid var(--line);
  padding: 24px 0;
  max-height: 80vh;
  overflow-y: auto;
}

@media (max-width: 860px) {
  .player-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
    max-height: none;
  }
}

.player-sidebar .module-title {
  padding: 14px 24px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.lesson-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.lesson-link:hover {
  background: var(--surface-hi);
  color: var(--ink);
}

.lesson-link.is-active {
  border-left-color: var(--gold-500);
  background: var(--surface-hi);
  color: var(--ink);
}

.lesson-link .lesson-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  flex-shrink: 0;
}

.lesson-link.is-complete .lesson-check {
  background: linear-gradient(100deg, var(--gold-500), var(--glow-purple));
  border-color: transparent;
  color: #1a0f06;
}

.player-main {
  padding: 40px 44px;
}

@media (max-width: 640px) {
  .player-main {
    padding: 28px 22px;
  }
}

.player-main .lesson-content {
  font-size: 1rem;
  line-height: 1.75;
  margin: 24px 0 32px;
}

.player-main .lesson-content p {
  margin-bottom: 1.2em;
}

.player-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

/* ---------- Quiz ---------- */
.quiz-question {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 18px;
}

.quiz-question .question-text {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.quiz-option:hover {
  border-color: var(--glow-purple);
}

.quiz-option input {
  accent-color: var(--gold-500);
}

.quiz-result {
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--line);
}

.quiz-result.is-pass {
  background: rgba(58, 166, 90, 0.1);
  border-color: rgba(58, 166, 90, 0.35);
}

.quiz-result.is-fail {
  background: rgba(214, 75, 63, 0.1);
  border-color: rgba(214, 75, 63, 0.35);
}

.quiz-result .score {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: var(--ink);
}

/* ---------- Certificate: a printable document, always on white,
   independent of the site's dark theme. ---------- */
.certificate-page {
  background: #f2f0ea;
  padding: 56px 20px;
}

.container-cert {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.certificate {
  position: relative;
  aspect-ratio: 1.414 / 1;
  display: flex;
  margin: 0 auto;
  background: #fffdf8;
  color: #1c1a14;
  padding: 14px;
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.45);
}

.certificate-inner {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1.5px solid #c8963f;
  padding: 34px 72px;
  text-align: center;
}

.certificate-inner::before {
  content: '';
  position: absolute;
  inset: 8px;
  border: 1px solid #dcd0b0;
  pointer-events: none;
}

.certificate .cert-logo {
  height: 38px;
  width: auto;
  margin: 0 auto 18px;
}

.certificate .cert-eyebrow {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #8a6a24;
  margin-bottom: 6px;
}

.certificate h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #1c1a14;
  margin: 0 0 20px;
}

.certificate .cert-intro {
  font-size: 0.92rem;
  color: #55503f;
  margin-bottom: 4px;
}

.certificate .cert-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.9rem;
  color: #1c1a14;
  margin: 4px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1.5px solid #c8963f;
  display: inline-block;
}

.certificate .cert-course-intro {
  font-size: 0.92rem;
  color: #55503f;
  margin-bottom: 4px;
}

.certificate .cert-course {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: #1c1a14;
  margin-bottom: 22px;
}

.certificate .cert-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: 24px;
  margin-top: 20px;
  padding-top: 8px;
  text-align: left;
}

.certificate .cert-sign-block {
  text-align: center;
}

.certificate .cert-sign-line {
  border-top: 1px solid #6b6450;
  padding-top: 8px;
  margin-top: 22px;
}

.certificate .cert-sign-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: #1c1a14;
}

.certificate .cert-sign-title {
  font-size: 0.76rem;
  color: #7a745e;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.certificate .cert-qr-block {
  text-align: center;
}

.certificate .cert-qr-block img {
  width: 76px;
  height: 76px;
  display: block;
  margin: 0 auto 6px;
  border: 1px solid #dcd0b0;
  padding: 4px;
  background: #fff;
}

.certificate .cert-qr-block .cert-code {
  font-family: 'SFMono-Regular', Menlo, Consolas, monospace;
  font-size: 0.7rem;
  color: #7a745e;
  letter-spacing: 0.04em;
}

.certificate .cert-seal {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 2px solid #c8963f;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  color: #c8963f;
  font-size: 1.6rem;
}

.certificate .cert-meta-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 30px;
  font-size: 0.76rem;
  color: #9b937a;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.certificate .cert-meta-row span:not(:last-child)::after {
  content: '/';
  margin-left: 10px;
  color: #dcd0b0;
}

@media (max-width: 640px) {
  .certificate-inner {
    padding: 36px 24px 30px;
  }
  .certificate .cert-footer {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 28px;
  }
  .certificate .cert-seal {
    display: none;
  }
}

@media print {
  .site-header, .site-footer, .bg-mesh, .bg-spotlight, .no-print { display: none !important; }
  body { background: #fff !important; }
  .certificate-page { background: #fff; padding: 0; }
  .certificate { box-shadow: none; max-width: 100%; }
}

/* ---------- Admin ---------- */
.admin-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: 70vh;
}

@media (max-width: 860px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }
}

.admin-sidebar {
  border-right: 1px solid var(--line);
  padding: 28px 0;
}

@media (max-width: 860px) {
  .admin-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
    display: flex;
    overflow-x: auto;
    padding: 12px 16px;
  }
}

.admin-sidebar a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .admin-sidebar a {
    border-left: none;
    border-radius: 999px;
    padding: 8px 16px;
    margin-right: 8px;
  }
}

.admin-sidebar a:hover {
  color: var(--ink);
}

.admin-sidebar a.is-active {
  color: var(--ink);
  border-left-color: var(--gold-500);
  background: var(--surface);
}

.admin-main {
  padding: 32px 36px;
}

@media (max-width: 640px) {
  .admin-main {
    padding: 22px 18px;
  }
}

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink-faint);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.data-table td {
  padding: 14px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
  vertical-align: middle;
}

.data-table tr:hover td {
  background: var(--surface);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.badge-success {
  background: rgba(58, 166, 90, 0.15);
  color: #7fdb9c;
}

.badge-muted {
  background: var(--surface-hi);
  color: var(--ink-faint);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  background: var(--surface);
}

.icon-btn:hover {
  color: var(--ink);
  border-color: var(--glow-purple);
}