/* AZ-104 Study Buddy — themed to match the AI-103 Study Buddy LMS */

:root {
  --primary: #0078d4;
  --primary-dark: #005a9e;
  --accent: #107c10;
  --warning: #ffb900;
  --danger: #d13438;
  --bg: #f3f2f1;
  --sidebar-bg: #1d2b3b;
  --sidebar-panel: #203754;
  --sidebar-hover: rgba(255, 255, 255, 0.07);
  --sidebar-text: #bddbfb;
  --sidebar-muted: #7f9cb8;
  --card-bg: #ffffff;
  --text: #323130;
  --text-muted: #605e5c;
  --border: #edebe9;
  --border-strong: #d2d0ce;
  --radius: 4px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --topbar-height: 64px;
  color-scheme: light;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
}

/* ── SIDEBAR ─────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  width: 320px;
  min-width: 320px;
  height: 100vh;
  overflow-y: auto;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  transition: transform 0.25s ease;
}

.brand {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-mark {
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 10px;
  border-radius: 2px;
  background: var(--primary);
  color: #ffffff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand p {
  color: #ffffff;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.brand span {
  display: block;
  margin-top: 4px;
  color: var(--sidebar-text);
  font-size: 12px;
}

.search-box {
  display: grid;
  gap: 8px;
  padding: 14px 20px 8px;
  color: rgba(176, 196, 216, 0.5);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.search-box input {
  min-height: 36px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  outline: none;
  background: rgba(255, 255, 255, 0.07);
  color: #ffffff;
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.3);
}

.nav-section {
  padding: 10px 20px 4px;
  color: rgba(176, 196, 216, 0.5);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.module-nav {
  display: block;
  padding: 4px 0 12px;
}

.overview-link,
.review-link,
.module-button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 44px;
  padding: 10px 20px;
  border: 0;
  border-left: 3px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--sidebar-text);
  font-size: 14px;
  text-align: left;
  transition: all 0.2s;
}

.overview-link:hover,
.review-link:hover,
.module-button:hover {
  background: var(--sidebar-hover);
  color: #ffffff;
}

.overview-link.active,
.review-link.active,
.module-button.active {
  background: var(--sidebar-panel);
  border-left-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
}

.nav-icon,
.module-dot {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
}

.nav-icon {
  font-size: 14px;
}

.module-button.active .module-dot {
  background: var(--primary);
}

.module-label {
  min-width: 0;
  flex: 1;
}

.module-name {
  display: block;
  line-height: 1.32;
  overflow-wrap: anywhere;
  font-size: 14px;
  font-weight: 700;
}

.module-meta {
  display: block;
  color: rgba(176, 196, 216, 0.6);
  font-size: 11px;
  font-weight: 500;
}

.module-count {
  margin-left: auto;
  flex-shrink: 0;
  color: var(--sidebar-muted);
  font-size: 11px;
  font-weight: 700;
}

.nav-ch-arrow {
  flex-shrink: 0;
  width: 14px;
  color: var(--sidebar-muted);
  font-size: 16px;
  text-align: center;
}

.nav-ch-group.open .module-button {
  background: var(--sidebar-panel);
  color: #ffffff;
}

.nav-ch-sub {
  padding: 4px 0 10px;
  background: rgba(0, 0, 0, 0.12);
  border-left: 3px solid rgba(0, 120, 212, 0.42);
}

.nav-section-link {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 18px 10px 28px;
  border: 0;
  border-left: 3px solid transparent;
  background: transparent;
  color: #d5e9ff;
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  transition: all 0.2s;
}

.nav-section-link:hover,
.nav-section-link.active {
  background: rgba(0, 120, 212, 0.18);
  border-left-color: var(--primary);
  color: #ffffff;
}

.nav-section-emoji {
  width: 22px;
  flex-shrink: 0;
  font-size: 16px;
  line-height: 1;
  text-align: center;
}

.nav-outline-group {
  margin: 2px 0;
}

.nav-sub-item {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  width: 100%;
  padding: 9px 16px 9px 24px;
  border: 0;
  border-left: 3px solid transparent;
  background: transparent;
  color: #d5e9ff;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  text-align: left;
}

.nav-sub-item:hover,
.nav-sub-item.active {
  background: rgba(0, 120, 212, 0.16);
  border-left-color: var(--primary);
  color: #ffffff;
}

.nav-sub-item.done .nav-sub-icon {
  background: rgba(16, 124, 16, 0.95);
}

.nav-sub-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 11px;
  line-height: 1;
}

.nav-objectives {
  display: grid;
  gap: 2px;
  padding: 0 14px 7px 58px;
}

.nav-objective {
  width: 100%;
  padding: 4px 0 4px 10px;
  border: 0;
  border-left: 2px solid rgba(127, 156, 184, 0.38);
  background: transparent;
  color: rgba(213, 233, 255, 0.72);
  font-size: 11.5px;
  line-height: 1.35;
  text-align: left;
}

.nav-objective:hover,
.nav-objective.active {
  border-left-color: var(--primary);
  color: #ffffff;
}

.nav-objective.active {
  background: rgba(0, 120, 212, 0.13);
  font-weight: 700;
}

.curriculum-heading {
  padding-top: 14px;
  color: rgba(189, 219, 251, 0.72);
  line-height: 1.35;
}

.sidebar-actions {
  margin-top: auto;
  padding: 16px 20px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ── MAIN / TOPBAR ───────────────────────────────────────── */
.main {
  min-height: 100vh;
  margin-left: 320px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 24px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

/* Leading cluster: hamburger + page title. Kept together so that when the
   topbar stacks on small screens the toggle stays beside the heading. */
.topbar-lead {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

/* Hidden until a breakpoint turns the sidebar into an off-canvas drawer. */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 20px;
  line-height: 1;
}

.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Backdrop behind the open drawer. Inert and invisible until .nav-open. */
.sidebar-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(15, 27, 43, 0.5);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.eyebrow {
  margin-bottom: 3px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.25;
}

.view-tabs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.tab-button {
  padding: 8px 18px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s;
}

.tab-button:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tab-button.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 120, 212, 0.3);
}

.content {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 32px 40px;
}

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

/* ── BUTTONS ─────────────────────────────────────────────── */
.button,
.choice-button {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.button {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.button:hover {
  background: var(--primary);
  color: #ffffff;
}

.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.button.ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: #ffffff;
}

.button.ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.button.full {
  width: 100%;
}

.button.link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

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

/* ── DASHBOARD HERO ──────────────────────────────────────── */
.dashboard-hero {
  position: relative;
  overflow: hidden;
  margin-bottom: 24px;
  padding: 36px 40px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1a73e8 0%, #1557b0 100%);
  color: #ffffff;
}

.dashboard-hero h2 {
  margin-bottom: 6px;
  font-size: 26px;
  font-weight: 800;
}

.dashboard-hero p {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.6;
  opacity: 0.85;
}

.exam-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 20px;
}

.exam-meta > div {
  padding: 10px 18px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.15);
}

.exam-meta div .label {
  font-size: 11px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  opacity: 0.75;
}

.exam-meta div .value {
  font-size: 20px;
  font-weight: 700;
}

/* ── RESUME CARD ─────────────────────────────────────────── */
.dashboard-resume-card {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding: 24px 28px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary) 0%, #1557b0 100%);
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 120, 212, 0.25);
}

.resume-card-icon {
  flex-shrink: 0;
  font-size: 40px;
}

.resume-card-body {
  flex: 1;
}

.resume-card-greeting {
  margin-bottom: 2px;
  font-size: 13px;
  opacity: 0.82;
}

.resume-card-title {
  margin-bottom: 4px;
  font-size: 20px;
  font-weight: 800;
}

.resume-card-sub {
  font-size: 13px;
  opacity: 0.82;
}

.resume-card-btn {
  flex-shrink: 0;
  padding: 10px 22px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: background 0.2s;
}

.resume-card-btn:hover {
  background: rgba(255, 255, 255, 0.28);
}

/* ── SECTION HEADERS ─────────────────────────────────────── */
.dashboard-section-header {
  margin: 24px 0 10px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

/* ── STAT CARDS ──────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}

.stats-row.two {
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 0;
}

.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  text-align: center;
}

.stat-card .stat-icon {
  margin-bottom: 8px;
  font-size: 28px;
  line-height: 1;
}

.stat-card .stat-val {
  width: 100%;
  color: var(--text);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
}

.stat-card .stat-label {
  width: 100%;
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.35;
  text-align: center;
}

/* ── CHAPTER CARDS ───────────────────────────────────────── */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.chapter-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.2s;
}

.chapter-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.ch-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ch-badge {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 4px;
  background: var(--primary);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
}

.ch-title {
  font-size: 15px;
  font-weight: 700;
}

.ch-desc {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.5;
}

.ch-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--bg);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
}

.tag.accent {
  background: rgba(16, 124, 16, 0.12);
  color: var(--accent);
}

.tag.primary {
  background: rgba(0, 120, 212, 0.1);
  color: var(--primary);
}

.ch-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}

.progress-bar-wrap {
  flex: 1;
  height: 6px;
  margin-right: 10px;
  overflow: hidden;
  border-radius: 3px;
  background: var(--bg);
}

.progress-bar {
  height: 100%;
  border-radius: 3px;
  background: var(--primary);
  transition: width 0.4s;
}

.progress-label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

/* ── CARDS / PANELS ──────────────────────────────────────── */
.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow);
}

.card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.card h3 .icon {
  font-size: 18px;
}

.card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.65;
}

.section-stack {
  display: grid;
  gap: 20px;
  align-content: start;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* ── CHAPTER (MODULE) HERO ───────────────────────────────── */
.chapter-hero {
  margin-bottom: 20px;
  padding: 28px 32px;
  border-left: 4px solid rgba(255, 255, 255, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #0078d4 0%, #106ebe 100%);
  color: #ffffff;
}

.chapter-hero h2 {
  margin-bottom: 8px;
  color: #ffffff;
  font-size: 22px;
  font-weight: 700;
}

.chapter-hero p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 14px;
  line-height: 1.65;
}

.ch-num-big {
  margin-bottom: 6px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ch-topic-progress-wrap {
  height: 6px;
  margin-top: 16px;
  overflow: hidden;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.2);
}

.ch-topic-progress-bar {
  height: 100%;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.85);
  transition: width 0.5s;
}

.module-chapter-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
}

.module-chapter-header h2 {
  margin: 0 0 6px;
  font-size: 20px;
}

.module-chapter-header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.55;
}

.module-chapter-header .ch-num-big {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.module-chapter-header .ch-topic-progress-wrap {
  height: 6px;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 3px;
  background: #e8eef5;
}

.module-chapter-header .ch-topic-progress-bar {
  background: var(--primary);
}

.module-chapter-header-actions {
  display: flex;
  flex-shrink: 0;
  gap: 10px;
}

.module-phase-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding: 0 4px 14px;
  border-bottom: 2px solid #e8eef5;
}

.module-phase-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  flex: 1;
}

.module-phase-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 10px 10px 0 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.module-phase-step:hover {
  background: #f4f8fc;
}

.module-phase-step.active {
  border-bottom-color: var(--primary);
  background: #f0f7ff;
}

.module-phase-icon {
  font-size: 20px;
  line-height: 1;
}

.module-phase-copy {
  display: grid;
  gap: 2px;
}

.module-phase-label {
  font-size: 14px;
  font-weight: 700;
}

.module-phase-sub {
  color: var(--text-muted);
  font-size: 11px;
}

.module-phase-link {
  flex-shrink: 0;
  border: 0;
  background: transparent;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.exam-objectives-panel h3,
.module-section-panel h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.panel-icon {
  font-size: 18px;
}

.exam-domain-line {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.exam-objective-list {
  margin: 0;
  padding-left: 20px;
  color: var(--text);
  line-height: 1.6;
}

.section-lead {
  margin: 0 0 16px;
  color: var(--text-muted);
  line-height: 1.6;
}

.scenario-list {
  display: grid;
  gap: 10px;
}

.scenario-objective {
  display: grid;
  gap: 4px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fbfdff;
  text-align: left;
  cursor: pointer;
}

.scenario-objective:hover {
  border-color: #9cc9ef;
  background: #f0f7ff;
}

.scenario-lesson {
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.scenario-text {
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
}

.labs-list {
  display: grid;
  gap: 12px;
}

.lab-item {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fbfdff;
}

.lab-lesson {
  display: block;
  margin-bottom: 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.lab-item p {
  margin: 0;
  line-height: 1.55;
}

.flashcard-stage {
  display: grid;
  gap: 14px;
  justify-items: center;
}

.flashcard {
  display: grid;
  place-items: center;
  width: min(100%, 520px);
  min-height: 220px;
  padding: 28px;
  border: 1px solid #b9d6f2;
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #f3f9ff 100%);
  box-shadow: 0 10px 24px rgba(17, 34, 68, 0.08);
  cursor: pointer;
}

.flashcard-face {
  font-size: 18px;
  line-height: 1.55;
  text-align: center;
}

.flashcard:not(.flipped) .flashcard-back,
.flashcard.flipped .flashcard-front {
  display: none;
}

.flashcard-meta {
  color: var(--text-muted);
  font-size: 12px;
}

.flashcard-nav {
  display: flex;
  gap: 10px;
}

.lab-detail p {
  margin: 0;
  line-height: 1.65;
}

.lesson-sidebar h3 {
  display: flex;
  align-items: center;
}

/* ── CHAPTER (MODULE) HERO continued ─────────────────────── */

.topic-counter {
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(0, 120, 212, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

/* ── MONITOR / BACKUP MIND MAP ───────────────────────────── */
.mind-map-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 0.58fr);
  gap: 22px;
  align-items: stretch;
  margin-bottom: 20px;
  overflow: hidden;
}

.mind-map-copy {
  display: grid;
  align-content: start;
  gap: 12px;
}

.mind-map-copy h3 {
  margin: 0;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 18px;
  font-weight: 800;
}

.mind-map-branches {
  display: grid;
  gap: 8px;
  margin: 2px 0 4px;
  list-style: none;
}

.mind-map-branches li {
  position: relative;
  padding-left: 18px;
  color: var(--text);
  font-size: 13px;
  line-height: 1.45;
}

.mind-map-branches li::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.mind-map-image-link {
  display: flex;
  min-height: 300px;
  max-height: 520px;
  overflow: hidden;
  border: 1px solid #2f3c48;
  border-radius: var(--radius);
  background: #000000;
  text-decoration: none;
}

.mind-map-image-link img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

/* ── MODULE / LESSON LAYOUT ──────────────────────────────── */
.module-shell,
.quiz-layout,
.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 20px;
  align-items: start;
}

.module-shell {
  grid-template-columns: minmax(250px, 0.34fr) minmax(0, 1.66fr);
}

/* Objective-focus mode renders a single panel with no lesson-list aside. The
   default two-column grid would strand that lone panel in the narrow first
   column and leave the wide second column empty, so give it the full width. */
.module-shell.module-shell--single {
  grid-template-columns: minmax(0, 1fr);
}

.module-shell > aside.card {
  position: sticky;
  top: calc(var(--topbar-height) + 12px);
  align-self: start;
  max-height: calc(100vh - var(--topbar-height) - 24px);
  overflow: auto;
}

.module-shell > aside.card h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.lesson-list {
  display: grid;
  gap: 8px;
}

.lesson-panel {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.lesson-button {
  display: grid;
  gap: 4px;
  width: 100%;
  min-height: 58px;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--text);
  text-align: left;
  transition: all 0.15s;
}

.lesson-button:hover {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.05);
}

.lesson-button.active {
  border-left-color: var(--primary);
  background: rgba(0, 120, 212, 0.08);
}

.lesson-button.done {
  border-left-color: var(--accent);
}

.lesson-button span:first-child {
  font-size: 13px;
  font-weight: 600;
}

.lesson-button span:last-child {
  color: var(--text-muted);
  font-size: 12px;
}

.lesson-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.lesson-header-copy {
  flex: 1 1 280px;
  min-width: 0;
}

.lesson-header h2 {
  margin-bottom: 6px;
  padding-bottom: 0;
  border-bottom: none;
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
}

.lesson-secondary {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
}

.lesson-secondary > summary {
  padding: 12px 16px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.lesson-secondary > summary::-webkit-details-marker {
  display: none;
}

.lesson-secondary > summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 8px;
  color: var(--primary);
  transition: transform 0.15s;
}

.lesson-secondary[open] > summary::before {
  transform: rotate(90deg);
}

.lesson-secondary-body {
  padding: 0 16px 14px;
}

.lesson-notes textarea {
  min-height: 110px;
}

.lesson-panel h2 {
  margin-bottom: 6px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(0, 120, 212, 0.2);
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
}

.objective-focus h2 {
  margin-top: 8px;
}

.objective-card {
  padding: 14px 16px;
  border: 1px solid rgba(0, 120, 212, 0.24);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  background: rgba(0, 120, 212, 0.06);
}

.objective-card p {
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.focused-topic .topic-viewer-header {
  margin-bottom: 10px;
}

.lesson-panel > div > p {
  color: var(--text);
  font-size: 14px;
  line-height: 1.85;
}

.lesson-actions,
.inline-actions,
.quiz-actions,
.pill-row,
.meta-line,
.resource-toolbar,
.practice-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.lesson-panel h3 {
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.list {
  list-style: none;
  display: grid;
}

.list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.55;
}

.list li:last-child {
  border-bottom: none;
}

.list li::before {
  content: "▸";
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary);
  font-size: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--bg);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
}

.pill:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 120, 212, 0.06);
}

.notes-box {
  display: grid;
  gap: 8px;
}

.notes-box label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.notes-box textarea {
  min-height: 140px;
  width: 100%;
  padding: 14px;
  resize: vertical;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  outline: none;
  background: #ffffff;
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.2s;
}

.notes-box textarea:focus {
  border-color: var(--primary);
}

/* ── TOPIC VIEWER (AI-103 style) ─────────────────────────── */
.topic-viewer {
  display: flex;
  flex-direction: column;
  min-height: min(520px, calc(100vh - 300px));
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
}

.topic-viewer-toolbar {
  flex-shrink: 0;
  padding: 14px 16px 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, #faf9f8 100%);
}

.topic-viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.topic-viewer-header h3 {
  margin: 0;
  padding: 0;
  border: none;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.topic-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 14px;
  padding-bottom: 12px;
}

.topic-dot {
  width: 11px;
  height: 11px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--border-strong);
  cursor: pointer;
  transition: all 0.25s;
}

.topic-dot.seen {
  background: var(--accent);
}

.topic-dot.active {
  background: var(--primary);
  transform: scale(1.35);
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.2);
}

.topic-slide {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  padding: 16px 18px 8px;
  animation: fadeIn 0.3s;
}

.topic-slide-body {
  flex: 1;
  min-height: 0;
  max-height: min(56vh, 620px);
  overflow: auto;
  padding-right: 4px;
}

.topic-nav-hint {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
}

.topic-learn {
  margin: 18px 0 6px;
  padding: 12px 14px;
  border: 1px solid rgba(0, 120, 212, 0.22);
  border-radius: 8px;
  background: rgba(0, 120, 212, 0.04);
}

.topic-learn strong {
  display: block;
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-learn ul {
  margin: 0;
  padding-left: 18px;
}

.topic-learn li {
  margin-bottom: 6px;
  font-size: 13px;
  line-height: 1.5;
}

.topic-learn a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.topic-learn a:hover {
  text-decoration: underline;
}

.topic-table-wrap {
  overflow-x: auto;
  margin: 14px 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.topic-title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(0, 120, 212, 0.2);
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
}

.topic-text {
  margin-bottom: 14px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.85;
}

.topic-text code,
.topic-bullets code,
.topic-steps code,
.topic-keybox code,
.exam-tip code,
.topic-table code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg);
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
}

.topic-bullets,
.topic-steps {
  margin: 8px 0 14px;
  padding-left: 24px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
}

.topic-bullets li,
.topic-steps li {
  margin-bottom: 6px;
}

.topic-keybox {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  background: rgba(0, 120, 212, 0.06);
  font-size: 13px;
  line-height: 1.75;
}

.topic-keybox strong {
  display: block;
  margin-bottom: 4px;
  color: var(--primary);
}

.exam-tip {
  margin: 16px 0;
  padding: 12px 16px;
  border: 1.5px solid #ffcc02;
  border-left: 5px solid #f9a825;
  border-radius: var(--radius);
  background: #fff8e1;
  color: #5f4c00;
  font-size: 13px;
  line-height: 1.7;
}

.exam-tip strong {
  display: block;
  margin-bottom: 4px;
  color: #7a4f00;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 16px 0 6px;
}

.topic-code-label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.topic-code {
  margin: 0 0 14px;
  padding: 14px 16px;
  overflow-x: auto;
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid #3c3c3c;
  border-radius: 4px;
  background: #1e1e1e;
  color: #d4d4d4;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.topic-table {
  width: 100%;
  margin: 14px 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-size: 13px;
}

.topic-table th {
  padding: 9px 14px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  text-align: left;
}

.topic-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  line-height: 1.5;
}

.topic-table tr:last-child td {
  border-bottom: none;
}

.topic-table tr:nth-child(even) td {
  background: var(--bg);
}

.topic-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  margin-top: auto;
  padding: 14px 16px;
  border-top: 1px solid var(--border);
  background: #faf9f8;
}

/* ── DOMAIN BARS ─────────────────────────────────────────── */
.domain-bars {
  display: grid;
  gap: 12px;
}

.domain-row {
  display: grid;
  gap: 6px;
}

.domain-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}

.progress-track {
  width: 100%;
  height: 6px;
  overflow: hidden;
  border-radius: 3px;
  background: var(--bg);
}

.progress-fill {
  width: var(--progress);
  height: 100%;
  border-radius: 3px;
  background: var(--accent, var(--primary));
  transition: width 0.4s;
}

/* ── RESOURCES / SEARCH ──────────────────────────────────── */
.resource-toolbar,
.practice-toolbar {
  justify-content: space-between;
  margin-bottom: 14px;
}

.resource-toolbar input,
.practice-toolbar select {
  min-height: 36px;
  padding: 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  outline: none;
  background: #ffffff;
  color: var(--text);
  font-size: 13px;
  transition: border-color 0.2s;
}

.resource-toolbar input:focus,
.practice-toolbar select:focus {
  border-color: var(--primary);
}

.resources-list,
.search-results {
  display: grid;
  gap: 12px;
}

.resource-item,
.search-result {
  padding: 20px 24px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  transition: border-color 0.2s;
}

.resource-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.resource-item:hover,
.search-result:hover {
  border-color: var(--primary);
}

.resource-item h2,
.search-result h2 {
  margin-bottom: 6px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.resource-item p,
.search-result p {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.meta-line {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

/* ── QUIZ ────────────────────────────────────────────────── */
.quiz-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow);
}

.quiz-q {
  margin-bottom: 20px;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  width: 100%;
  padding: 12px 18px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font-size: 14px;
  text-align: left;
  transition: all 0.2s;
}

.quiz-option:hover {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.05);
}

.quiz-option.selected {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.08);
  font-weight: 600;
}

.quiz-option.correct {
  border-color: var(--accent);
  background: rgba(16, 124, 16, 0.1);
  color: var(--accent);
  font-weight: 600;
}

.quiz-option.wrong {
  border-color: var(--danger);
  background: rgba(209, 52, 56, 0.1);
  color: var(--danger);
}

.choice-key {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
}

.quiz-option.selected .choice-key {
  background: var(--primary);
  color: #ffffff;
}

.quiz-option.correct .choice-key {
  background: var(--accent);
  color: #ffffff;
}

.quiz-option.wrong .choice-key {
  background: var(--danger);
  color: #ffffff;
}

.quiz-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
}

.quiz-feedback {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 14px;
}

.quiz-feedback strong {
  display: block;
  margin-bottom: 4px;
}

.quiz-feedback.correct {
  border: 1px solid rgba(16, 124, 16, 0.35);
  background: rgba(16, 124, 16, 0.12);
  color: var(--text);
}

.quiz-feedback.correct .quiz-feedback-status,
.quiz-feedback.correct .quiz-feedback-answer {
  color: var(--accent);
}

.quiz-feedback.wrong {
  border: 1px solid rgba(209, 52, 56, 0.25);
  background: rgba(209, 52, 56, 0.08);
  color: var(--text);
}

.quiz-feedback.wrong .quiz-feedback-status {
  color: var(--danger);
}

.quiz-feedback.wrong .quiz-feedback-answer {
  color: var(--accent);
}

.quiz-feedback .pq-ref a {
  color: var(--primary);
}

.empty-state {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--text-muted);
  text-align: center;
}

/* ── PRACTICE QUIZ SETUP (Security+ / AI-103 style) ───────── */
.pq-setup {
  display: grid;
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
}

.pq-setup-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px 18px;
  padding: 4px 2px 0;
}

.pq-setup-eyebrow {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
}

.pq-setup-toolbar-copy p {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.5;
}

.pq-setup-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pq-btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: #ffffff;
}

.pq-btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 120, 212, 0.05);
}

.pq-btn-muted {
  padding: 6px 14px;
  border-color: var(--border);
  color: var(--text-muted);
  font-size: 12px;
}

.pq-hero {
  margin-bottom: 0;
}

.pq-resume {
  margin-bottom: 0;
}

.pq-panel {
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.pq-panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  padding: 0;
  border: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
}

.pq-panel-icon {
  font-size: 18px;
  line-height: 1;
}

.pq-panel-hint {
  margin: -4px 0 14px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.55;
}

.pq-mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.pq-mode-card {
  display: grid;
  gap: 8px;
  padding: 18px 18px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  color: var(--text);
  text-align: left;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.pq-mode-card:hover {
  border-color: rgba(0, 120, 212, 0.45);
}

.pq-mode-card.selected {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.04);
  box-shadow: 0 0 0 1px rgba(0, 120, 212, 0.12);
}

.pq-mode-icon {
  font-size: 22px;
  line-height: 1;
}

.pq-mode-name {
  font-size: 15px;
  font-weight: 700;
}

.pq-mode-desc {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.55;
}

.pq-topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.pq-topic-card {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
  color: var(--text);
  text-align: left;
  transition: all 0.15s;
}

.pq-topic-card:hover {
  border-color: rgba(0, 120, 212, 0.4);
}

.pq-topic-card.selected {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.06);
  box-shadow: inset 0 0 0 1px rgba(0, 120, 212, 0.15);
}

.pq-topic-name {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.pq-topic-count {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

.pq-topic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.pq-option-block + .pq-option-block {
  margin-top: 18px;
}

.pq-option-label {
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pq-toggle-row,
.pq-size-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.pq-toggle,
.pq-size-btn {
  min-height: 40px;
  padding: 8px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
}

.pq-toggle:hover,
.pq-size-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pq-toggle.active,
.pq-size-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

.pq-toggle:disabled,
.pq-size-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.pq-size-input-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

.pq-size-input-wrap input {
  width: 72px;
  min-height: 40px;
  padding: 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.pq-size-input-wrap input:focus {
  border-color: var(--primary);
  outline: none;
}

.pq-start-btn {
  width: 100%;
  min-height: 48px;
  margin-top: 4px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(0, 120, 212, 0.28);
}

.pq-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 16px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
}

.pq-progressbar {
  flex: 1 1 160px;
  height: 8px;
  overflow: hidden;
  border-radius: 4px;
  background: var(--bg);
}

.pq-progressbar > div {
  height: 100%;
  border-radius: 4px;
  background: var(--primary);
  transition: width 0.3s;
}

.pq-score,
.pq-timer {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.pq-score-correct {
  color: var(--accent);
}

.pq-timer {
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.pq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.pq-question {
  margin-bottom: 16px;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  white-space: pre-wrap;
}

.pq-img {
  display: block;
  width: 100%;
  max-height: min(58vh, 640px);
  margin: 12px 0 16px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #faf9f8;
}

.pq-img.answer {
  border-color: rgba(16, 124, 16, 0.35);
}

.pq-interactive {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.pq-order-hint {
  margin: 0 0 0.25rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.pq-order-row,
.pq-match-row {
  display: grid;
  grid-template-columns: minmax(8rem, 1fr) minmax(12rem, 2fr);
  gap: 0.75rem;
  align-items: center;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
}

.pq-order-row.correct,
.pq-match-row.correct {
  border-color: #2e7d32;
  background: rgba(46, 125, 50, 0.08);
}

.pq-yesno-table .pq-match-label {
  font-weight: 500;
}

.pq-yesno-choices {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.pq-yesno-choice {
  min-width: 4.5rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.pq-yesno-choice:hover:not(:disabled) {
  border-color: var(--primary);
}

.pq-yesno-choice.selected {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.12);
  color: var(--primary);
}

.pq-match-row.correct .pq-yesno-choice.selected {
  border-color: var(--accent);
  background: rgba(16, 124, 16, 0.14);
  color: var(--accent);
}

.pq-match-row.wrong .pq-yesno-choice.selected {
  border-color: var(--danger);
  background: rgba(209, 52, 56, 0.12);
  color: var(--danger);
}

.pq-yesno-choice:disabled {
  cursor: default;
  opacity: 0.95;
}

.pq-order-row.wrong,
.pq-match-row.wrong {
  border-color: #c62828;
  background: rgba(198, 40, 40, 0.08);
}

.pq-order-label,
.pq-match-label {
  font-weight: 600;
  font-size: 0.92rem;
}

.pq-order-select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: inherit;
  font: inherit;
}

.pq-order-select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

@media (max-width: 640px) {
  .pq-order-row,
  .pq-match-row {
    grid-template-columns: 1fr;
  }
}

.pq-visual-prompt {
  margin: 12px 0 16px;
  padding: 16px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background: var(--bg);
}

.pq-visual-prompt p {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.pq-answer-sheet {
  margin: 12px 0 16px;
  padding: 16px;
  border: 1px solid rgba(16, 124, 16, 0.25);
  border-radius: 8px;
  background: rgba(16, 124, 16, 0.05);
}

.pq-answer-label {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pq-selfgrade {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.pq-selfgrade span {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.pq-ref a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.pq-ref a:hover {
  text-decoration: underline;
}

.pq-community {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  color: var(--text-muted);
  font-size: 12px;
}

.pq-missed {
  display: grid;
  gap: 8px;
}

.pq-missed-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  text-align: left;
  transition: border-color 0.15s;
}

.pq-missed-item:hover {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.04);
}

.pq-exam-review .pq-review-list {
  display: grid;
  gap: 16px;
  margin-top: 14px;
}

.pq-review-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.pq-review-item:last-child {
  border-bottom: none;
}

/* ══ GITHUB LAB INTEGRATION ═════════════════════════════════ */
/* Source badges — make it unmistakable which content is Microsoft-authoritative
   (repo) versus Study-Buddy authored pedagogy. */
.src-badge {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.src-badge.repo {
  background: rgba(0, 120, 212, 0.12);
  color: var(--primary-dark);
}

.src-badge.authored {
  background: rgba(136, 71, 204, 0.14);
  color: #6b32a8;
}

/* Lab sidebar */
.lab-sidebar-hint {
  margin: -4px 0 10px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.45;
}

.lab-nav-button {
  position: relative;
}

.lab-nav-progress {
  display: block;
  width: 100%;
  height: 4px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 2px;
  background: var(--bg);
}

.lab-nav-progress > span {
  display: block;
  height: 100%;
  border-radius: 2px;
  background: var(--accent, var(--primary));
  transition: width 0.3s;
}

.lab-sync-note {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
}

.lab-fresh {
  display: inline-block;
  margin-top: 6px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.45;
}

.lab-fresh code {
  padding: 0 4px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.06);
  font-family: Consolas, "Courier New", monospace;
}

.lab-fresh.checking,
.lab-fresh.unknown {
  color: var(--text-muted);
  font-weight: 600;
}

.lab-fresh.current {
  color: var(--accent);
}

.lab-fresh.behind {
  color: #a65b00;
}

.lab-sync-note code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--bg);
  font-family: Consolas, "Courier New", monospace;
}

.lab-sync-note a {
  color: var(--primary);
  font-weight: 600;
}

/* Lab path header */
.lab-meta-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.lab-meta-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 100px;
  background: var(--bg);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
}

.tool-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border: 1px solid rgba(0, 120, 212, 0.35);
  border-radius: 100px;
  background: rgba(0, 120, 212, 0.08);
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 700;
}

.tool-badge.tool-bicep {
  border-color: rgba(92, 45, 145, 0.35);
  background: rgba(92, 45, 145, 0.08);
  color: #5c2d91;
}

.tool-badge.tool-arm {
  border-color: rgba(16, 124, 16, 0.35);
  background: rgba(16, 124, 16, 0.08);
  color: #0b6a0b;
}

.lab-progress-wrap {
  height: 8px;
  margin: 16px 0 4px;
  overflow: hidden;
  border-radius: 4px;
  background: var(--bg);
}

.lab-progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--accent, var(--primary));
  transition: width 0.4s;
}

.lab-path-lead {
  margin: 8px 0 4px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.5;
}

/* Numbered learning-path steps */
.lab-step {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.lab-step-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.lab-step-num {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
}

.lab-step-head h3 {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: none;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.lab-step-body {
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.lab-exam-obj {
  margin-bottom: 8px;
}

.lab-domain {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 10px;
  border-radius: 100px;
  background: rgba(0, 120, 212, 0.1);
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 700;
}

.lab-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.lab-two-col h4,
.lab-files h4 {
  margin-bottom: 6px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.lab-list {
  margin: 0;
  padding-left: 20px;
  line-height: 1.6;
}

.lab-list li {
  margin-bottom: 5px;
}

.lab-tools-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

.lab-link-list {
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.lab-link-list a {
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.lab-link-list a:hover {
  text-decoration: underline;
}

.file-type {
  display: inline-block;
  min-width: 34px;
  margin-right: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
  text-transform: uppercase;
}

/* Hands-on lab */
.lab-scenario {
  margin-bottom: 12px;
  padding: 12px 14px;
  border-left: 3px solid var(--primary);
  border-radius: 0 8px 8px 0;
  background: rgba(0, 120, 212, 0.05);
  font-style: italic;
}

.lab-open-line {
  margin: 12px 0 16px;
}

.lab-progress-inline {
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
}

.lab-progress-line {
  margin: 6px 0 16px;
  color: var(--text-muted);
  font-size: 13px;
}

/* Inline lab instructions — a seamless document, not a bordered card.
   Each task flows on the page; only a subtle top rule separates them. */
.lab-instructions-wrap {
  display: grid;
  gap: 4px;
}

.lab-task-block {
  padding: 8px 0 4px;
}

.lab-task-block + .lab-task-block {
  border-top: 1px solid var(--border);
  margin-top: 8px;
  padding-top: 16px;
}

.lab-task-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.lab-task-heading h4 {
  flex: 1;
  min-width: 0;
  margin: 0;
  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 800;
}

.lab-task-check {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-strong);
  border-radius: 6px;
  background: #ffffff;
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.lab-task-block.done .lab-task-check {
  border-color: var(--accent);
  background: var(--accent);
}

.lab-task-block.done .lab-task-heading h4 {
  color: var(--accent);
}

/* Rendered markdown body — typography only, no container chrome. */
.lab-instructions {
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
}

.lab-instructions > *:first-child {
  margin-top: 0;
}

.lab-instructions p {
  margin: 0 0 10px;
}

.lab-instructions h3,
.lab-instructions h4,
.lab-instructions h5 {
  margin: 18px 0 8px;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
}

.lab-instructions ol,
.lab-instructions ul {
  margin: 0 0 10px;
  padding-left: 24px;
}

.lab-instructions li {
  margin-bottom: 6px;
}

.lab-instructions li > p {
  margin-bottom: 6px;
}

.lab-instructions a {
  color: var(--primary);
  font-weight: 600;
}

.lab-instructions code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg);
  font-family: Consolas, "Courier New", monospace;
  font-size: 12.5px;
  word-break: break-word;
}

.lab-instructions pre {
  margin: 0 0 12px;
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 8px;
  background: #1e1e1e;
  color: #d4d4d4;
  font-size: 12.5px;
  line-height: 1.55;
}

.lab-instructions pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

/* Repo "Note" / "Did you know?" callouts are plain blockquotes. */
.lab-instructions blockquote {
  margin: 0 0 12px;
  padding: 10px 14px;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  background: rgba(0, 120, 212, 0.06);
  color: var(--text);
  font-size: 13px;
}

.lab-instructions blockquote p:last-child {
  margin-bottom: 0;
}

.lab-instructions table {
  width: 100%;
  margin: 0 0 12px;
  border-collapse: collapse;
  font-size: 13px;
}

.lab-instructions th,
.lab-instructions td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.lab-instructions th {
  background: var(--bg);
  font-weight: 700;
}

.lab-instructions img {
  max-width: 100%;
  height: auto;
  margin: 4px 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.lab-source-line {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
}

.lab-source-line a {
  color: var(--primary);
  font-weight: 600;
  word-break: break-all;
}

.lab-files {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background: var(--bg);
}

/* Troubleshooting */
.lab-trouble {
  display: grid;
  gap: 12px;
}

.trouble-item {
  padding: 12px 14px;
  border: 1px solid rgba(209, 52, 56, 0.25);
  border-left: 4px solid var(--danger);
  border-radius: 0 8px 8px 0;
  background: rgba(209, 52, 56, 0.04);
}

.trouble-problem {
  margin-bottom: 6px;
  color: #b02a2e;
  font-size: 13px;
  font-weight: 700;
}

.trouble-cause,
.trouble-fix {
  font-size: 13px;
  line-height: 1.55;
}

.trouble-cause {
  margin-bottom: 4px;
  color: var(--text-muted);
}

/* Knowledge check */
.kcheck {
  display: grid;
  gap: 16px;
}

.kcheck-prompt {
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.kcheck-opts {
  display: grid;
  gap: 8px;
}

.kcheck-opt {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font-size: 13px;
  text-align: left;
  transition: all 0.15s;
}

.kcheck-opt:not(:disabled):hover {
  border-color: var(--primary);
  background: rgba(0, 120, 212, 0.05);
}

.kcheck-opt:disabled {
  cursor: default;
}

.kcheck-opt.correct {
  border-color: var(--accent);
  background: rgba(16, 124, 16, 0.1);
  color: #1b5e20;
  font-weight: 600;
}

.kcheck-opt.wrong {
  border-color: var(--danger);
  background: rgba(209, 52, 56, 0.1);
  color: #b02a2e;
}

.kcheck-explain {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.55;
}

.kcheck-explain.right {
  background: rgba(16, 124, 16, 0.08);
  color: #1b5e20;
}

.kcheck-explain.off {
  background: rgba(209, 52, 56, 0.06);
  color: #8a2226;
}

.lab-cleanup-note {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 185, 0, 0.1);
  font-size: 13px;
  line-height: 1.55;
}

/* Topic → lab recommendation card */
.lab-rec {
  margin: 4px 0;
  padding: 16px 18px;
  border: 1.5px solid rgba(0, 120, 212, 0.3);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(0, 120, 212, 0.05) 0%, rgba(0, 120, 212, 0.02) 100%);
}

.lab-rec-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.lab-rec-icon {
  font-size: 16px;
}

.lab-rec-eyebrow {
  flex: 1;
  min-width: 0;
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lab-rec-title {
  margin-bottom: 6px;
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
}

.lab-rec-why {
  margin-bottom: 12px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.55;
}

.lab-rec-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.lab-rec-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ══ RESPONSIVE ═════════════════════════════════════════════
   Breakpoints run largest → smallest. Above 980px the sidebar is a
   permanent 320px rail. At/below 980px it becomes an off-canvas drawer
   toggled by the topbar hamburger, so the full width is freed for content
   on tablets and phones alike. Each smaller breakpoint only layers on the
   adjustments that width needs — nothing is redefined twice. */

/* ── Tablet & below: sidebar becomes an off-canvas drawer ── */
@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
  }

  .sidebar {
    width: min(320px, 86vw);
    min-width: 0;
    transform: translateX(-100%);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.35);
  }

  .app-shell.nav-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-scrim {
    display: block;
    pointer-events: none;
  }

  .app-shell.nav-open .sidebar-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .main {
    margin-left: 0;
  }

  /* Multi-column content grids fold to a single column now that the
     content spans the full viewport width. */
  .dashboard-grid,
  .module-shell,
  .quiz-layout,
  .mind-map-panel,
  .two-col,
  .pq-mode-grid,
  .pq-topic-grid {
    grid-template-columns: 1fr;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .module-shell > aside.card {
    position: static;
    max-height: none;
  }

  .topic-slide-body {
    max-height: none;
  }

  .topic-viewer {
    min-height: 0;
  }

  .pq-size-input-wrap {
    width: 100%;
    margin-left: 0;
  }

  .pq-setup-toolbar-actions {
    width: 100%;
  }

  .pq-setup-toolbar-actions .button {
    flex: 1 1 auto;
  }
}

/* ── Phone: stack the topbar and single-column everything ── */
@media (max-width: 640px) {
  .content,
  .topbar {
    padding-left: 16px;
    padding-right: 16px;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .view-tabs,
  .lesson-actions,
  .inline-actions,
  .quiz-actions,
  .resource-toolbar,
  .practice-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-button,
  .button,
  .resource-toolbar input,
  .practice-toolbar select {
    width: 100%;
  }

  .stats-row,
  .stats-row.two,
  .chapters-grid,
  .resource-item,
  .lab-two-col {
    grid-template-columns: 1fr;
  }

  .dashboard-hero {
    padding: 26px 22px;
  }

  .dashboard-resume-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .mind-map-image-link {
    min-height: 260px;
    max-height: 360px;
  }
}

/* ── Small phone: tighten padding so nothing overflows ── */
@media (max-width: 400px) {
  .content {
    padding-left: 12px;
    padding-right: 12px;
  }

  .dashboard-hero {
    padding: 22px 18px;
  }

  .dashboard-hero h2 {
    font-size: 22px;
  }

  .quiz-card,
  .pq-panel {
    padding: 18px 16px;
  }
}