/* ============================================================
   EduWallPanels — Main Stylesheet
   Premium, minimal, investor-ready
   ============================================================ */

:root {
  --black:        #0a0a0a;
  --off-black:    #111111;
  --dark:         #1a1a1a;
  --mid:          #2c2c2c;
  --border:       #e8e8e8;
  --border-dark:  #333333;
  --muted:        #888888;
  --text:         #1a1a1a;
  --text-light:   #555555;
  --white:        #ffffff;
  --off-white:    #f8f8f8;
  --accent:       #c8a96e;   /* gold — premium feel */
  --accent-light: #d4b98a;
  --accent-dark:  #a8894e;
  --success:      #2d7a4f;
  --success-bg:   #f0faf5;
  --error:        #b91c1c;
  --error-bg:     #fef2f2;
  --warning:      #92400e;
  --warning-bg:   #fffbeb;
  --radius:       8px;
  --radius-lg:    14px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.08);
  --shadow:       0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:    0 12px 40px rgba(0,0,0,0.14);
  --transition:   0.22s ease;
  --font:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--off-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font); }

/* ── Typography ── */
h1, h2, h3, h4, h5 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--off-black);
  letter-spacing: -0.02em;
}
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

p { margin-bottom: 1rem; color: var(--text-light); }
p:last-child { margin-bottom: 0; }

/* ── Layout ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header / Nav ── */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--off-black);
  letter-spacing: -0.03em;
}

.site-logo__icon {
  width: 32px;
  height: 32px;
  background: var(--off-black);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.site-logo__icon svg {
  width: 18px;
  height: 18px;
  fill: var(--accent);
}

.site-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-logo__name { font-size: 0.95rem; font-weight: 700; }
.site-logo__sub  { font-size: 0.65rem; font-weight: 400; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-user {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  letter-spacing: -0.01em;
}

.btn--primary {
  background: var(--off-black);
  color: var(--white);
}
.btn--primary:hover {
  background: var(--dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn--ghost {
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--mid);
  color: var(--text);
  background: var(--off-white);
}

.btn--accent {
  background: var(--accent);
  color: var(--white);
  font-weight: 600;
}
.btn--accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(200,169,110,0.35);
}

.btn--danger {
  background: transparent;
  color: var(--error);
  border: 1px solid #fecaca;
}
.btn--danger:hover {
  background: var(--error-bg);
}

.btn--sm { padding: 6px 14px; font-size: 0.8rem; }
.btn--lg { padding: 14px 32px; font-size: 1rem; font-weight: 600; width: 100%; justify-content: center; }

.btn--logout {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  padding: 7px 14px;
}
.btn--logout:hover {
  color: var(--error);
  border-color: #fecaca;
}

/* ── Login Page ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--off-white);
  padding: 24px;
}

.login-page::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--off-black), var(--accent), var(--off-black));
}

.login-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border);
}

.login-header {
  text-align: center;
  margin-bottom: 36px;
}

.login-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.login-logo__icon {
  width: 52px;
  height: 52px;
  background: var(--off-black);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-logo__icon svg {
  width: 26px;
  height: 26px;
  fill: var(--accent);
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--off-black);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0;
}

/* ── Forms ── */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}

.form-input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--off-black);
  box-shadow: 0 0 0 3px rgba(10,10,10,0.08);
}

.form-input::placeholder { color: var(--muted); }

select.form-input { cursor: pointer; }

.form-hint {
  font-size: 0.775rem;
  color: var(--muted);
  margin-top: 5px;
}

/* ── Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.alert--error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

.alert--success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.alert--warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid #fde68a;
}

/* ── Dashboard ── */
.page-main {
  padding: 40px 0 80px;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--off-black);
  margin-bottom: 6px;
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 32px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}

.lesson-count {
  font-size: 0.825rem;
  color: var(--muted);
  font-weight: 400;
}

/* ── Video Grid ── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .video-grid { grid-template-columns: 1fr; }
}

/* ── Video Card ── */
.video-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: transparent;
}

.video-card__thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--mid);
  flex-shrink: 0;
}

.video-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-card__thumb img {
  transform: scale(1.04);
}

/* Play button overlay */
.video-card__play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.18);
  opacity: 0;
  transition: opacity var(--transition);
}

.video-card:hover .video-card__play {
  opacity: 1;
}

.video-card__play-icon {
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  transform: scale(0.85);
  transition: transform var(--transition);
}

.video-card:hover .video-card__play-icon {
  transform: scale(1);
}

.video-card__play-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--off-black);
  margin-left: 2px;
}

/* Title strip */
.video-card__strip {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 24px 14px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, transparent 100%);
}

.video-card__order {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2px;
}

.video-card__title-over {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.3;
}

/* Card body */
.video-card__body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.video-card__desc {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.video-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.progress-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.progress-badge--completed {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.progress-badge--in-progress {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.progress-badge--not-started {
  background: var(--off-white);
  color: var(--muted);
  border: 1px solid var(--border);
}

.video-card__arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.video-card:hover .video-card__arrow {
  background: var(--off-black);
  border-color: var(--off-black);
}

.video-card__arrow svg {
  width: 12px;
  height: 12px;
  stroke: var(--muted);
  transition: stroke var(--transition);
}

.video-card:hover .video-card__arrow svg {
  stroke: var(--white);
}

/* Placeholder thumbnail */
.thumb-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--dark) 0%, var(--mid) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-placeholder svg {
  width: 40px;
  height: 40px;
  fill: rgba(255,255,255,0.15);
}

/* ── Lesson Page ── */
.lesson-page { padding: 32px 0 80px; }

.lesson-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.825rem;
  color: var(--muted);
  margin-bottom: 28px;
  transition: color var(--transition);
}

.lesson-back:hover { color: var(--text); }

.lesson-back svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

.lesson-header { margin-bottom: 28px; }

.lesson-number {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.lesson-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--off-black);
  margin-bottom: 10px;
}

.lesson-description {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 640px;
  margin: 0;
}

/* Video wrapper */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--off-black);
  box-shadow: var(--shadow-lg);
  margin-bottom: 48px;
}

.video-wrapper iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Lesson content */
.lesson-content-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 40px;
  align-items: start;
}

@media (max-width: 960px) {
  .lesson-content-grid { grid-template-columns: 1fr; }
}

.lesson-text-section { min-width: 0; }

.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* Rendered lesson text (markdown) */
.lesson-text {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-light);
}

.lesson-text h2 {
  font-size: 1.2rem;
  color: var(--off-black);
  margin: 28px 0 12px;
  padding-top: 8px;
}

.lesson-text h3 {
  font-size: 1rem;
  color: var(--off-black);
  margin: 22px 0 10px;
}

.lesson-text p { margin-bottom: 14px; }

.lesson-text ul, .lesson-text ol {
  margin: 10px 0 14px 20px;
}

.lesson-text li { margin-bottom: 5px; }

.lesson-text strong { color: var(--off-black); font-weight: 600; }

.lesson-text blockquote {
  border-left: 3px solid var(--accent);
  padding: 12px 18px;
  margin: 20px 0;
  background: #fefcf7;
  border-radius: 0 6px 6px 0;
  font-style: italic;
}

.lesson-text blockquote p { color: var(--text); margin: 0; }

.lesson-text code {
  background: var(--off-white);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: 'Fira Code', 'Courier New', monospace;
}

.lesson-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.875rem;
}

.lesson-text th {
  background: var(--off-black);
  color: var(--white);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}

.lesson-text td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
}

.lesson-text tr:hover td { background: var(--off-white); }

/* ── Quiz ── */
.quiz-sidebar {
  /* main column on the left — no sticky needed */
}

.lesson-text-section {
  position: sticky;
  top: 88px;
}

.quiz-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.quiz-card__header {
  background: var(--off-black);
  padding: 20px 24px;
}

.quiz-card__header-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 4px;
}

.quiz-card__header-sub {
  font-size: 0.775rem;
  color: rgba(255,255,255,0.5);
}

.quiz-card__body { padding: 24px; }

.quiz-questions { display: flex; flex-direction: column; gap: 24px; }

.quiz-question { }

.quiz-question__text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--off-black);
  margin-bottom: 12px;
  line-height: 1.45;
}

.quiz-question__num {
  display: inline-block;
  width: 22px;
  height: 22px;
  background: var(--off-black);
  color: var(--white);
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
  text-align: center;
  line-height: 22px;
  margin-right: 8px;
  flex-shrink: 0;
}

.quiz-answers { display: flex; flex-direction: column; gap: 8px; }

.quiz-answer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--white);
}

.quiz-answer:hover {
  border-color: var(--off-black);
  background: var(--off-white);
}

.quiz-answer input[type="radio"] {
  margin-top: 2px;
  accent-color: var(--off-black);
  flex-shrink: 0;
}

.quiz-answer label {
  font-size: 0.85rem;
  color: var(--text-light);
  cursor: pointer;
  line-height: 1.4;
}

.quiz-answer:has(input:checked) {
  border-color: var(--off-black);
  background: #f5f5f5;
}

.quiz-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.quiz-submit-wrap { margin-top: 24px; }

/* ── Quiz Results ── */
.result-page { padding: 48px 0 80px; }

.result-hero {
  text-align: center;
  padding: 48px 24px;
  margin-bottom: 48px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.result-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.result-icon--passed {
  background: var(--success-bg);
  border: 2px solid #bbf7d0;
}

.result-icon--failed {
  background: var(--error-bg);
  border: 2px solid #fecaca;
}

.result-icon svg {
  width: 32px;
  height: 32px;
}

.result-score {
  font-size: 3rem;
  font-weight: 800;
  color: var(--off-black);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 8px;
}

.result-label {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.result-label--passed { color: var(--success); }
.result-label--failed { color: var(--error); }

.result-sub {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.stat { text-align: center; }

.stat__value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--off-black);
  display: block;
}

.stat__label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Review answers */
.review-list { display: flex; flex-direction: column; gap: 20px; }

.review-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.review-item--correct { border-left: 3px solid var(--success); }
.review-item--incorrect { border-left: 3px solid var(--error); }

.review-item__status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.review-item__status--correct { color: var(--success); }
.review-item__status--incorrect { color: var(--error); }

.review-item__question {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--off-black);
  margin-bottom: 12px;
}

.review-answer {
  font-size: 0.85rem;
  padding: 8px 12px;
  border-radius: 6px;
  margin-bottom: 6px;
}

.review-answer--selected-correct {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.review-answer--selected-wrong {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

.review-answer--correct {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.review-explanation {
  margin-top: 12px;
  padding: 10px 14px;
  background: #fffbeb;
  border-radius: 6px;
  border: 1px solid #fde68a;
  font-size: 0.825rem;
  color: var(--warning);
}

.review-explanation strong { font-weight: 600; }

/* Result actions */
.result-actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* ── Admin ── */
.admin-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: calc(100vh - 64px);
}

@media (max-width: 768px) {
  .admin-layout { grid-template-columns: 1fr; }
}

.admin-sidebar {
  background: var(--off-black);
  padding: 28px 0;
}

.admin-nav { display: flex; flex-direction: column; }

.admin-nav__label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  padding: 0 20px;
  margin: 16px 0 8px;
}

.admin-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  transition: all var(--transition);
  border-left: 3px solid transparent;
}

.admin-nav a:hover,
.admin-nav a.active {
  color: var(--white);
  background: rgba(255,255,255,0.06);
  border-left-color: var(--accent);
}

.admin-nav svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  flex-shrink: 0;
}

.admin-main { padding: 36px 40px; background: var(--off-white); }

@media (max-width: 768px) {
  .admin-main { padding: 24px; }
}

.admin-page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--off-black);
  margin-bottom: 4px;
}

.admin-page-sub {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0 0 32px;
}

/* Stat cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 36px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}

.stat-card__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--off-black);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card__label {
  font-size: 0.775rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Table */
.data-table-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  background: var(--off-white);
  padding: 11px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 13px 16px;
  font-size: 0.875rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--off-white); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.badge--admin {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.badge--user {
  background: var(--off-white);
  color: var(--muted);
  border: 1px solid var(--border);
}

.badge--active {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.badge--inactive {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

.table-actions { display: flex; gap: 8px; align-items: center; }

/* Form card */
.form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  max-width: 540px;
}

@media (max-width: 600px) {
  .form-card { padding: 24px 20px; }
}

.form-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.form-card__sub {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 28px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-footer {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ── Checkbox ── */
.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-wrap input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--off-black);
  cursor: pointer;
}

.checkbox-wrap label {
  font-size: 0.875rem;
  color: var(--text-light);
  cursor: pointer;
}

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 64px 24px;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  stroke: var(--border);
  margin: 0 auto 16px;
}

.empty-state h3 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 6px;
}

.empty-state p { font-size: 0.875rem; }

/* ── Error pages ── */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--border);
  line-height: 1;
  letter-spacing: -0.06em;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--off-black);
  margin-bottom: 12px;
}

.error-text {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 24px;
}

/* ── Utilities ── */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.text-muted { color: var(--muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.w-full { width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── Responsive tweaks ── */
@media (max-width: 768px) {
  .page-main { padding: 28px 0 60px; }
  .lesson-page { padding: 24px 0 60px; }
  .login-card { padding: 36px 24px; }
  .result-stats { gap: 24px; }
  h1 { font-size: 1.6rem; }
}