:root {
  --bg: #08111f;
  --card: rgba(10, 18, 33, 0.96);
  --text: #f4f8ff;
  --accent: #7cc0ff;
  --accent2: #9cf3db;
  --border: rgba(125, 166, 230, 0.35);
  --muted: #c9dcff;
  --success: #4caf50;
  --danger: #ff4d4d;
}

body[data-theme="light"] {
  --bg: #f5f8ff;
  --card: rgba(255, 255, 255, 0.98);
  --text: #142033;
  --accent: #2563eb;
  --accent2: #0f766e;
  --border: rgba(37, 99, 235, 0.22);
  --muted: #385072;
}

body[data-theme="high-contrast"] {
  --bg: #000;
  --card: #000;
  --text: #fff;
  --accent: #ffd400;
  --accent2: #00ffff;
  --border: #fff;
  --muted: #fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: linear-gradient(160deg, var(--bg), #132649);
  color: var(--text);
  line-height: 1.6;
}

body[data-theme="light"] {
  background: linear-gradient(160deg, #f5f8ff, #dfeafe);
}

body[data-theme="high-contrast"] {
  background: #000;
}

body[data-font-size="large"] {
  font-size: 1.1rem;
}

body[data-font-size="x-large"] {
  font-size: 1.22rem;
}

.wrap {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

.hero,
details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 12px;
  padding: 16px;
}

details {
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

details.active-card {
  border-color: var(--accent);
  box-shadow: 0 12px 28px rgba(124, 192, 255, 0.16);
}

details.completed-card {
  border-color: rgba(76, 175, 80, 0.55);
  box-shadow: 0 10px 24px rgba(76, 175, 80, 0.12);
}

details.locked-card {
  opacity: 0.78;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.summary-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.step-badge,
.state-badge,
.progress-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(124, 192, 255, 0.12);
  font-weight: 800;
}

.step-badge {
  font-size: 0.92rem;
}

.state-badge {
  font-size: 0.84rem;
}

.state-badge.completed {
  background: rgba(76, 175, 80, 0.15);
  border-color: rgba(76, 175, 80, 0.45);
}

.state-badge.active {
  background: rgba(124, 192, 255, 0.14);
}

.state-badge.locked {
  background: rgba(255, 255, 255, 0.06);
}

.sticky-progress {
  position: sticky;
  top: 10px;
  z-index: 50;
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(10, 18, 33, 0.88);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
  margin-bottom: 16px;
}

body[data-theme="light"] .sticky-progress {
  background: rgba(255, 255, 255, 0.92);
}

body[data-theme="high-contrast"] .sticky-progress {
  background: #000;
  border: 2px solid #fff;
}

.sticky-progress .meta {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.sticky-bar-wrap {
  min-width: 260px;
  flex: 1;
}

.sticky-bar {
  flex: 1;
  min-width: 220px;
}

.jump-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.jump-link {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.jump-link:hover {
  background: rgba(124, 192, 255, 0.12);
}

.jump-link.done {
  background: rgba(76, 175, 80, 0.18);
  border-color: rgba(76, 175, 80, 0.55);
  color: var(--success);
}

.jump-link.done:hover {
  background: rgba(76, 175, 80, 0.28);
}

.bar {
  height: 10px;
  background: #0b1424;
  border-radius: 10px;
  overflow: hidden;
}

.fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

.day-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
  padding: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(10px);
}

.day-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 12px 10px;
  font-weight: 700;
  color: var(--text);
  box-shadow: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.day-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  background: rgba(124, 192, 255, 0.12);
  border-color: var(--border);
}

.day-btn.current {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #08111f;
  border-color: transparent;
  box-shadow: 0 10px 22px rgba(124, 192, 255, 0.28);
}

.day-btn:disabled {
  opacity: 1;
  cursor: default;
}

body[data-theme="light"] .day-nav {
  background: rgba(37, 99, 235, 0.06);
}

body[data-theme="high-contrast"] .day-nav {
  background: #000;
  border: 2px solid #fff;
}

body[data-theme="high-contrast"] .day-btn {
  border: 1px solid #fff;
}

button {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent);
  border: none;
  font-weight: 700;
  cursor: pointer;
  color: #08111f;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

body[data-theme="light"] select {
  background: #fff;
  color: #142033;
}

body[data-theme="high-contrast"] select {
  background: #000;
  color: #fff;
  border: 2px solid #fff;
}

button:focus-visible,
select:focus-visible,
textarea:focus-visible,
input:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent2);
  outline-offset: 3px;
}

.part-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

textarea,
input[type="text"] {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  background: #08111f;
  color: #fff;
  border: 1px solid var(--border);
}

body[data-theme="light"] textarea,
body[data-theme="light"] input[type="text"] {
  background: #fff;
  color: #142033;
}

body[data-theme="high-contrast"] textarea,
body[data-theme="high-contrast"] input[type="text"] {
  background: #000;
  color: #fff;
  border: 2px solid #fff;
}

textarea {
  min-height: 90px;
}

iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 12px;
  margin: 8px 0 12px;
}

.note,
.fun,
.quiz-box {
  border-radius: 12px;
  margin: 10px 0;
  padding: 12px;
  border: 1px solid var(--border);
}

.note {
  background: rgba(124, 192, 255, 0.12);
}

.fun {
  background: rgba(156, 243, 219, 0.12);
  border-color: rgba(156, 243, 219, 0.25);
}

.quiz-box {
  background: transparent;
}

.quiz-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

label {
  display: block;
  margin: 6px 0;
}

.quiz-progress {
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 8px;
}

.feedback {
  font-weight: 700;
  margin-top: 8px;
}

.explanation {
  margin-top: 8px;
  color: var(--muted);
}

.bottom-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
}

.checklist li {
  margin: 8px 0;
}

.control-panel {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.control-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.compact-note {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 700px) {
  .day-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .day-btn.current {
    grid-column: span 2;
  }

  .part-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Day 2 additions — training/lab.css
   Classes used exclusively by day2.html
   ============================================================ */

/* ── Download button ────────────────────────────────────────── */
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  background: rgba(156, 243, 219, 0.14);
  border: 1px solid rgba(156, 243, 219, 0.38);
  color: var(--accent2);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.15s;
}
.btn-download:hover { background: rgba(156, 243, 219, 0.24); }

/* ── Keyboard key style ─────────────────────────────────────── */
kbd {
  background: rgba(124, 192, 255, 0.12);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.88em;
  font-family: monospace;
  color: var(--accent);
}

/* ── Page header banner ─────────────────────────────────────── */
.page-header {
  background: linear-gradient(135deg, #0d1b2a, #1a3050);
  color: var(--text);
  padding: 28px 20px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin: 0 0 6px; font-size: 1.45rem; }
.page-header p  { margin: 0; opacity: 0.8; font-size: 1rem; }
body[data-theme="light"] .page-header {
  background: linear-gradient(135deg, #dbeafe, #eff6ff);
  color: #142033;
}
body[data-theme="high-contrast"] .page-header {
  background: #000;
  border-bottom: 2px solid #fff;
}

/* ── Intro grid (objectives + time table) ───────────────────── */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.intro-card {
  background: rgba(124, 192, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.intro-card h3 { margin: 0 0 10px; font-size: 1rem; }
.objectives-list { margin: 0; padding-left: 18px; }
.objectives-list li { margin-bottom: 6px; }

/* ── Time table ─────────────────────────────────────────────── */
.time-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.time-table th,
.time-table td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.time-table th  { font-weight: 700; color: var(--muted); }

/* ── Goal / How to Use / Success Criteria ───────────────────── */
.goal-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.goal-card {
  background: rgba(156, 243, 219, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.goal-card h3   { margin: 0 0 10px; font-size: 1rem; }
.goal-card ul   { margin: 0; padding-left: 18px; }
.goal-card li   { margin-bottom: 4px; font-size: 0.92rem; }
.goal-card p    { margin: 0; font-size: 0.92rem; }

/* ── Part content / actions ─────────────────────────────────── */
.part-content   { padding-top: 10px; }
.part-actions   { margin-top: 14px; }
.part-title     { font-size: 1rem; font-weight: 700; }

/* ── Sticky-progress rows ───────────────────────────────────── */
.sticky-progress {
  flex-direction: column;
  align-items: stretch;
}
.progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  width: 100%;
}
.progress-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  white-space: nowrap;
}
.step-text    { font-weight: 800; font-size: 0.92rem; color: var(--accent); }
.percent-text { font-weight: 700; font-size: 0.92rem; color: var(--muted); }
.progress-row .bar { flex: 1; min-width: 120px; }

/* ── Feedback states ────────────────────────────────────────── */
.feedback.correct   { color: var(--success); }
.feedback.incorrect { color: var(--danger);  }

/* ── Hint box ───────────────────────────────────────────────── */
.hint-box {
  background: rgba(255, 220, 0, 0.1);
  border: 1px solid rgba(255, 220, 0, 0.35);
  border-radius: 10px;
  padding: 10px 14px;
  margin-top: 10px;
  font-size: 0.92rem;
}
body[data-theme="high-contrast"] .hint-box {
  background: #000;
  border: 2px solid #ffd400;
  color: #ffd400;
}

/* ── Matching activity ──────────────────────────────────────── */
.match-grid { display: flex; flex-direction: column; gap: 10px; margin: 10px 0; }
.match-row  {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  gap: 10px;
  align-items: center;
}
.match-term   { font-weight: 700; }
.match-result { font-size: 1.2rem; width: 1.4rem; text-align: center; }

/* ── Troubleshooting scenario box ───────────────────────────── */
.trouble-scenario {
  background: rgba(124, 192, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin: 10px 0;
  font-size: 0.97rem;
  line-height: 1.7;
  font-style: italic;
}

/* ── Progress dots ──────────────────────────────────────────── */
.progress-dots { display: flex; gap: 8px; margin: 8px 0 14px; }
.progress-dot  {
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: transparent;
  transition: background 0.2s, border-color 0.2s;
}
.progress-dot.done    { background: var(--success); border-color: var(--success); }
.progress-dot.current { background: var(--accent);  border-color: var(--accent);  }

/* ── Mastery message ────────────────────────────────────────── */
.mastery-msg {
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.5);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 14px;
}
body[data-theme="high-contrast"] .mastery-msg {
  background: #000;
  border: 2px solid #00ff00;
  color: #00ff00;
}

/* ── Weak / strong comparison ───────────────────────────────── */
.weak-strong { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0; }
.ws-box      { border-radius: 12px; padding: 14px; border: 1px solid var(--border); }
.ws-box h4   { margin: 0 0 8px; }
.ws-weak     { background: rgba(255, 77, 77, 0.1);  border-color: rgba(255, 77, 77,  0.3); }
.ws-strong   { background: rgba(76, 175, 80, 0.1);  border-color: rgba(76, 175, 80,  0.3); }
.ws-note     { font-size: 0.85rem; color: var(--muted); margin: 6px 0 0; }

/* ── Summary output ─────────────────────────────────────────── */
.summary-output { min-height: 200px; font-family: monospace; font-size: 0.9rem; resize: vertical; }

/* ── Quiz & options ─────────────────────────────────────────── */
.quiz-prompt { font-size: 1.02rem; margin: 6px 0 12px; }
.quiz-options div    { margin-bottom: 8px; }
.quiz-options label  { display: flex; align-items: flex-start; gap: 8px; cursor: pointer; margin: 0; }
.quiz-options input  { margin-top: 3px; flex-shrink: 0; }

/* ── Checklist (Part 6) ─────────────────────────────────────── */
.checklist          { list-style: none; padding: 0; margin: 10px 0; }
.checklist li       {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-bottom: 8px;
}
.checklist label    { display: flex; align-items: center; gap: 10px; margin: 0; cursor: pointer; font-weight: 600; }
.checklist input[type="checkbox"] { width: 18px; height: 18px; flex-shrink: 0; }

/* ── Video wrap ─────────────────────────────────────────────── */
.video-wrap { margin: 10px 0; }

/* ── Font-size label ────────────────────────────────────────── */
.font-size-label { margin: 0; font-weight: 600; }

/* ── Summary label ──────────────────────────────────────────── */
.summary-label { margin-top: 14px; }

/* ── Confetti particle ──────────────────────────────────────── */
@keyframes confettiFall {
  0%   { transform: translateY(0)    rotate(0deg);   opacity: 1; }
  80%  { opacity: 1; }
  100% { transform: translateY(105vh) rotate(540deg); opacity: 0; }
}
.confetti-particle {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  animation: confettiFall linear forwards;
}

/* ── Responsive tweaks ──────────────────────────────────────── */
@media (max-width: 700px) {
  .intro-grid   { grid-template-columns: 1fr; }
  .goal-section { grid-template-columns: 1fr; }
  .weak-strong  { grid-template-columns: 1fr; }
  .match-row    { grid-template-columns: 1fr; }
  .progress-meta { flex-direction: row; }
}

/* ============================================================
   Day 3 additions — training/lab.css
   Classes used exclusively by day3.html
   ============================================================ */

/* ── File type cards (3-column grid) ────────────────────────── */
.filetype-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 14px 0;
}
.filetype-card {
  background: rgba(124, 192, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.filetype-icon { font-size: 2rem; margin-bottom: 6px; }
.filetype-card h4 {
  font-size: 1.25rem;
  margin: 4px 0 2px;
  color: var(--accent);
}
.ft-tag {
  display: block;
  font-size: 0.82rem;
  font-weight: 800;
  opacity: 0.7;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.filetype-card p { font-size: 0.91rem; margin: 0; text-align: left; }

/* ── Vocabulary grid ────────────────────────────────────────── */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 10px 0 14px;
}
.vocab-card {
  background: rgba(156, 243, 219, 0.07);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.91rem;
  line-height: 1.5;
}

/* ── Workflow steps ─────────────────────────────────────────── */
.workflow-row {
  display: flex;
  align-items: stretch;
  gap: 6px;
  margin: 14px 0;
  flex-wrap: wrap;
}
.workflow-step {
  flex: 1;
  min-width: 120px;
  background: rgba(156, 243, 219, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 10px;
  text-align: center;
}
.ws-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #08111f;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.workflow-step h4 { margin: 0 0 6px; font-size: 0.97rem; color: var(--accent2); }
.workflow-step p  { margin: 0; font-size: 0.84rem; }
.workflow-arrow {
  display: flex;
  align-items: center;
  font-size: 1.4rem;
  color: var(--muted);
  padding: 0 2px;
  flex-shrink: 0;
}

/* ── Responsive tweaks for Day 3 additions ──────────────────── */
@media (max-width: 700px) {
  .filetype-grid { grid-template-columns: 1fr; }
  .vocab-grid    { grid-template-columns: 1fr; }
  .workflow-arrow { display: none; }
  .workflow-row   { flex-direction: column; }
}

/* ============================================================
   Shared new components — all days
   ============================================================ */

/* ── Vocabulary section ──────────────────────────────────────── */
.vocab-section { margin-bottom: 12px; }
.vocab-section h3 { margin: 0 0 6px; }
.vocab-section p  { margin: 0 0 10px; font-size: 0.93rem; }
.glossary-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}
.glossary-link:hover { text-decoration: underline; }

/* ── Join link ───────────────────────────────────────────────── */
.join-link {
  color: var(--accent);
  font-weight: 700;
}

/* ── Teacher punch list ──────────────────────────────────────── */
.teacher-punchlist {
  background: rgba(255, 220, 80, 0.07);
  border: 2px dashed rgba(255, 220, 80, 0.45);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 14px 0;
}
body[data-theme="high-contrast"] .teacher-punchlist {
  background: #000;
  border: 2px dashed #ffd400;
}
.punchlist-header {
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffd400;
  margin-bottom: 6px;
}
body[data-theme="light"] .punchlist-header { color: #a07800; }
.punchlist-note {
  font-size: 0.88rem;
  opacity: 0.75;
  margin: 0 0 10px;
  font-style: italic;
}
.punchlist-items {
  list-style: none;
  padding: 0;
  margin: 0;
}
.punchlist-items li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 220, 80, 0.2);
  font-size: 0.93rem;
}
.punchlist-items li:last-child { border-bottom: none; }
.punchlist-icon { font-size: 1.1rem; flex-shrink: 0; padding-top: 1px; }

/* ── Guided notes ────────────────────────────────────────────── */
.guided-notes {
  background: rgba(156, 243, 219, 0.07);
  border: 1px solid rgba(156, 243, 219, 0.3);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 14px 0;
}
body[data-theme="high-contrast"] .guided-notes {
  background: #000;
  border: 2px solid #00ffff;
}
.guided-notes-header {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--accent2);
  margin-bottom: 6px;
}
.guided-notes-intro {
  font-size: 0.88rem;
  margin: 0 0 12px;
  opacity: 0.8;
}
.guided-notes-list {
  padding-left: 20px;
  margin: 0;
}
.guided-notes-list li {
  margin-bottom: 12px;
  font-size: 0.93rem;
  line-height: 1.7;
}
.guided-fill {
  display: inline-block;
  width: auto;
  min-width: 160px;
  max-width: 260px;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.06);
  border: 1px dashed var(--border);
  color: var(--text);
  font-size: 0.9rem;
  vertical-align: middle;
}
body[data-theme="light"] .guided-fill { background: rgba(0,0,0,0.04); }
body[data-theme="high-contrast"] .guided-fill { border: 1px dashed #fff; background: #000; color: #fff; }

/* ── Alternative videos ──────────────────────────────────────── */
.alt-videos {
  background: rgba(124, 192, 255, 0.07);
  border: 1px solid rgba(124, 192, 255, 0.25);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 14px 0;
}
.alt-videos-header {
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}
.alt-videos p { margin: 0 0 8px; font-size: 0.9rem; }
.alt-videos ul { margin: 0; padding-left: 18px; }
.alt-videos li { margin-bottom: 6px; font-size: 0.9rem; }
.alt-videos a  { color: var(--accent); font-weight: 700; }

/* ── Dive deeper ─────────────────────────────────────────────── */
.dive-deeper {
  background: rgba(156, 243, 219, 0.06);
  border: 1px solid rgba(156, 243, 219, 0.28);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 14px 0;
}
.dive-deeper-header {
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent2);
  margin-bottom: 6px;
}
.dive-deeper p { margin: 0 0 6px; font-size: 0.9rem; }
.dive-deeper a { color: var(--accent2); font-weight: 700; }

/* ── Logo comparison (Day 4) ─────────────────────────────────── */
.logo-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 14px 0;
}
.logo-example {
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border);
}
.logo-good  { background: rgba(76, 175, 80, 0.08);  border-color: rgba(76, 175, 80, 0.35); }
.logo-bad   { background: rgba(255, 77, 77, 0.08);   border-color: rgba(255, 77, 77, 0.35); }
.logo-label {
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 10px;
}
.logo-good .logo-label  { color: var(--success); }
.logo-bad  .logo-label  { color: var(--danger); }
.logo-preview-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}
.logo-icon-large { font-size: 3rem; flex-shrink: 0; }
.logo-desc-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.86rem;
}
.logo-note {
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0;
  opacity: 0.85;
}
.logo-tips-callout {
  background: rgba(124, 192, 255, 0.09);
  border: 1px solid rgba(124, 192, 255, 0.28);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 12px 0;
}
.logo-tips-callout strong { display: block; margin-bottom: 8px; font-size: 0.95rem; }
.logo-tips-callout ul { margin: 0; padding-left: 18px; }
.logo-tips-callout li { margin-bottom: 6px; font-size: 0.9rem; line-height: 1.5; }

/* ── Responsive tweaks for new components ────────────────────── */
@media (max-width: 700px) {
  .logo-compare { grid-template-columns: 1fr; }
  .logo-preview-box { flex-direction: column; }
}