/* AI Lab 28-day index + day detail */

.lab-28-page {
  background: var(--navy-darker);
  padding-top: var(--header-h);
}

.lab-28-page .site-header {
  position: fixed;
  background: rgba(6, 21, 45, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.lab-28-page .header-inner {
  justify-content: space-between;
}

.lab-28-page .logo--sr {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  font-weight: 700;
  font-size: 1.05rem;
}

.lab-28-wrap {
  padding-block: clamp(2rem, 6vw, 3rem) clamp(3rem, 8vw, 4.5rem);
}

.lab-28-back {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}

.lab-28-back:hover,
.lab-28-back:focus-visible {
  color: var(--accent);
}

.lab-28-header {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.lab-28-header .section-label {
  margin-bottom: 0.5rem;
}

.lab-28-header .lab-section-preview {
  margin-bottom: 0.75rem;
}

.lab-28-header h1 {
  font-size: clamp(1.625rem, 5vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.lab-28-intro {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

.lab-28-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 560px) {
  .lab-28-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .lab-28-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.875rem;
  }
}

.lab-28-item {
  display: block;
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1.15rem;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}

.lab-28-item:hover {
  border-color: rgba(255, 255, 255, 0.14);
  transform: translateY(-1px);
}

.lab-28-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.lab-28-item-num {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 0.45rem;
}

.lab-28-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  margin: 0;
}

.lab-28-item--live {
  border-color: rgba(46, 184, 196, 0.28);
}

.lab-28-item--live .lab-28-item-num {
  color: var(--accent);
}

.lab-28-item--soon {
  opacity: 0.78;
}

.lab-28-item--soon:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.lab-hub-grid {
  margin-top: 0.25rem;
}

.lab-28-item--soon .lab-28-item-title {
  color: color-mix(in srgb, var(--text) 88%, var(--text-muted) 12%);
}

.lab-section-preview {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 0.65rem;
}

.lab-day-wrap {
  padding-block: clamp(2rem, 6vw, 3rem) clamp(3rem, 8vw, 4.5rem);
}

.lab-day-header {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.lab-day-header .lab-eyebrow {
  margin-bottom: 0.75rem;
}

.lab-day-header h1 {
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.lab-day-body {
  max-width: 40rem;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.lab-day-body p {
  margin: 0 0 1.15rem;
}

.lab-day-nav {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  max-width: 40rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.lab-day-nav a {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
}

.lab-day-nav a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.lab-day-nav-label {
  color: var(--text-muted);
  font-weight: 500;
}

.lab-day-status {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.lab-day-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin: 0 0 0.85rem;
}

.lab-day-progress {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.lab-day-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
}

.lab-day-badge--live {
  border-color: rgba(46, 184, 196, 0.35);
  color: var(--accent);
}

.lab-day-badge--soon {
  color: var(--text-muted);
}

.lab-prompt-box--soon {
  opacity: 0.85;
}

.lab-copy-soon {
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.lab-day-wrap--locked .lab-lesson-step--result p {
  color: var(--text-muted);
}

.lab-video {
  max-width: 42rem;
  margin: 0 0 2rem;
  padding: 1.25rem 1.35rem 1.35rem;
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.lab-video-heading {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}

.lab-video-caption {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.lab-video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
}

.lab-video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.lab-video-external {
  margin: 0.85rem 0 0;
  font-size: 0.875rem;
  font-weight: 600;
}

.lab-video-external a {
  color: var(--accent);
}

.lab-video-external a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.lab-video-placeholder {
  padding: 1.25rem 1rem;
  border-radius: calc(var(--radius) - 2px);
  border: 1px dashed rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.2);
}

.lab-video-placeholder p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.lab-video-placeholder code {
  font-size: 0.8125rem;
  color: var(--text);
}

.logo-img--lab {
  height: 40px;
  max-width: 200px;
}

@media (min-width: 768px) {
  .logo-img--lab {
    height: 44px;
    max-width: 220px;
  }
}

.lab-lesson {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 42rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.lab-lesson-step {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem 1.35rem;
}

.lab-lesson-heading {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}

.lab-lesson-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 999px;
  background: rgba(46, 184, 196, 0.15);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.lab-lesson-step p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.lab-lesson-step--result p {
  color: var(--text);
}

.lab-prompt-box {
  position: relative;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 2px);
  padding: 1rem 1rem 3rem;
}

.lab-prompt-text {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

.lab-copy-btn {
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.lab-copy-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
}

.lab-day-locked {
  color: var(--text-muted);
  font-weight: 600;
}

.lab-progress-pill {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(46, 184, 196, 0.35);
  color: var(--accent);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.lab-course-wrap {
  padding-block: clamp(2rem, 6vw, 3rem) clamp(3rem, 8vw, 4.5rem);
}

.lab-course-header {
  max-width: 42rem;
  margin-bottom: 2.5rem;
}

.lab-course-header h1 {
  font-size: clamp(1.75rem, 5vw, 2.35rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.lab-course-lead {
  font-size: 1.125rem;
  line-height: 1.6;
  margin: 0 0 1.25rem;
}

.lab-course-intro {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.lab-course-intro p {
  margin: 0 0 0.75rem;
}

.lab-course-start {
  margin: 1.75rem 0 0;
}

.lab-curriculum-title {
  font-size: clamp(1.25rem, 3.5vw, 1.5rem);
  margin: 0 0 0.5rem;
}

.lab-curriculum-hint {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
  max-width: 40rem;
}

.lab-curriculum-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--navy-card);
}

.lab-curriculum-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.lab-curriculum-table th,
.lab-curriculum-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.lab-curriculum-table th {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.2);
}

.lab-curriculum-table tbody tr:last-child td {
  border-bottom: 0;
}

.lab-curriculum-table td:first-child {
  width: 6.5rem;
  white-space: nowrap;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.lab-curriculum-table a {
  color: var(--text);
  font-weight: 600;
  transition: color 0.2s;
}

.lab-curriculum-table a:hover {
  color: var(--accent);
}

.lab-curriculum-row--locked td {
  color: var(--text-muted);
}

.lab-course-more {
  margin: 1.5rem 0 0;
}