/* ===== CSS Variables & Reset ===== */
:root {
  --stanford-cardinal: #8C1515;
  --stanford-dark: #2E2D29;
  --stanford-warm: #B83A4B;
  --stanford-light-bg: #F4F1EC;
  --stanford-white: #FFFFFF;
  --stanford-cool-gray: #4D4F53;
  --stanford-stone: #D2C295;
  --accent-green: #008566;
  --accent-blue: #006CB8;
  --accent-gold: #B26F16;
  --border-color: #D4D1CC;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Source Sans 3', 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--stanford-dark);
  background: var(--stanford-light-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Layout ===== */
.app-header {
  background: var(--stanford-cardinal);
  color: white;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.header-top h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.header-subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  font-weight: 400;
}

/* Header breadcrumb navigation */
.header-crumb {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  opacity: 0.75;
  padding: 2px 6px;
  border-radius: 4px;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.header-crumb:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
}

.header-crumb-current {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 1;
  font-weight: 700;
}

/* Header nav items — integrated into the header bar */
.header-nav-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.header-nav-item:hover {
  background: rgba(255, 255, 255, 0.15);
  color: white;
}

.header-nav-item:active {
  background: rgba(255, 255, 255, 0.25);
}

.header-nav-muted {
  opacity: 0.6;
}

.header-nav-muted:hover {
  opacity: 1;
}

.progress-bar-container {
  background: rgba(0,0,0,0.2);
  height: 4px;
  position: relative;
}

.progress-bar-ref {
  position: absolute;
  right: 160px;
  top: 6px;
}

.progress-bar-label {
  position: absolute;
  right: 80px;
  top: 6px;
  font-size: 0.72rem;
  color: var(--stanford-cool-gray);
  font-weight: 600;
}

.progress-bar-reset {
  position: absolute;
  right: 24px;
  top: 6px;
}

.progress-bar-reset-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: none;
  border: none;
  color: var(--stanford-cool-gray);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.progress-bar-reset-btn:hover {
  opacity: 1;
}

.progress-bar {
  height: 100%;
  background: var(--stanford-stone);
  transition: width 0.4s ease;
  width: 0%;
}

.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
  flex: 1;
}

/* ===== Course Catalog ===== */
.course-catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.course-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px 24px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--stanford-cardinal);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.course-card-image {
  margin: -28px -24px 16px -24px;
  height: 160px;
  overflow: hidden;
}

.course-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.course-card:hover .course-card-image img {
  filter: grayscale(0%);
}

.course-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-left-color: var(--stanford-warm);
}

.course-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--stanford-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-course {
  flex-shrink: 0;
  color: var(--stanford-cardinal);
}

.course-card > p {
  font-size: 0.9rem;
  color: var(--stanford-cool-gray);
  line-height: 1.5;
  flex: 1;
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  gap: 16px;
}

.course-progress-info {
  flex: 1;
}

.course-progress-bar-bg {
  background: rgba(0,0,0,0.08);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
}

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

.course-progress-text {
  font-size: 0.78rem;
  color: var(--stanford-cool-gray);
  margin-top: 4px;
  display: block;
}

.under-construction-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--accent-gold);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 6px;
}

/* ===== Navigation / Module List ===== */
.module-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.module-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.module-card-image {
  margin: -20px -20px 14px -20px;
  height: 140px;
  overflow: hidden;
}

.module-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.module-card:hover .module-card-image img {
  filter: grayscale(0%);
}

.module-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--stanford-cardinal);
}

.module-card.completed {
  border-left: 4px solid var(--accent-green);
}

.module-card.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.module-card .module-number {
  display: inline-block;
  background: var(--stanford-cardinal);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  text-align: center;
  line-height: 28px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.module-card.completed .module-number {
  background: var(--accent-green);
}

.module-time {
  font-size: 0.7em;
  font-weight: 400;
  color: var(--stanford-cool-gray);
  vertical-align: middle;
}

.module-card-capstone {
  grid-column: 1 / -1;
  border: 2px solid var(--stanford-cardinal);
  background: linear-gradient(135deg, #fff 0%, #fdf8f8 100%);
}

.module-card-capstone .module-number {
  background: var(--accent-gold);
  font-size: 0.95rem;
}

.module-card-capstone h3 {
  font-size: 1.15rem;
  color: var(--stanford-cardinal);
}

.module-card-capstone-badge {
  margin-top: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--stanford-cardinal);
  background: rgba(140, 21, 21, 0.08);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
}

.module-card h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--stanford-dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-module {
  flex-shrink: 0;
  color: var(--stanford-cool-gray);
}

.module-card p {
  font-size: 0.88rem;
  color: var(--stanford-cool-gray);
  margin: 0;
}

.module-status {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.module-status.done {
  background: #e6f4ea;
  color: var(--accent-green);
}

.module-status.in-progress {
  background: #fff3e0;
  color: var(--accent-gold);
}

/* ===== Welcome/Landing ===== */
.welcome-section {
  text-align: center;
  padding: 40px 20px 20px;
}

.welcome-section h2 {
  font-size: 1.8rem;
  color: var(--stanford-cardinal);
  margin-bottom: 8px;
}

.welcome-section p {
  font-size: 1.05rem;
  color: var(--stanford-cool-gray);
  max-width: 600px;
  margin: 0 auto 24px;
}

/* ===== Module Content Pages ===== */
.module-hero-image {
  margin: -32px -32px 24px -32px;
  max-height: 240px;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.module-hero-image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
}

.module-page {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 24px;
}

.module-page h2 {
  color: var(--stanford-cardinal);
  font-size: 1.5rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--stanford-light-bg);
}

.module-page h3 {
  color: var(--stanford-dark);
  font-size: 1.15rem;
  margin: 24px 0 10px;
}

.module-page p, .module-page li {
  font-size: 0.95rem;
  line-height: 1.65;
}

.module-page ul, .module-page ol {
  margin-left: 20px;
  margin-bottom: 16px;
}

.module-page li {
  margin-bottom: 6px;
}

/* Section hover — gray tint on content blocks within modules */
.module-page h3,
.module-page > p,
.module-page > ul,
.module-page > ol,
.module-page > table,
.module-page > .emcalc-domains,
.module-page > .compliance-note,
.quiz-question {
  border-radius: var(--radius);
  padding-left: 8px;
  padding-right: 8px;
  margin-left: -8px;
  margin-right: -8px;
  transition: background 0.2s ease;
}

.module-page h3:hover,
.module-page > p:hover,
.module-page > ul:hover,
.module-page > ol:hover,
.module-page > table:hover,
.module-page > .emcalc-domains:hover,
.module-page > .compliance-note:hover,
.quiz-question:hover {
  background: rgba(0, 0, 0, 0.03);
}

/* ===== Code Tables ===== */
.code-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 0.9rem;
}

.code-table th {
  background: var(--stanford-cardinal);
  color: white;
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.code-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.code-table tr:nth-child(even) {
  background: #fafaf8;
}

.code-table tr:hover {
  background: #f0ede6;
}

.code-table .highlight-change {
  background: #e6f4ea;
  font-weight: 600;
  color: #1a7431;
}

.code-table .table-row-highlight td {
  background: #fef7e0;
}

.note-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #b45309;
  background: #fef3c7;
  padding: 1px 8px;
  border-radius: 10px;
  margin-left: 6px;
  vertical-align: middle;
}

.code-table .cpt-code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 600;
  color: var(--stanford-cardinal);
  white-space: nowrap;
}

.code-table .icd-code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 500;
  color: var(--accent-blue);
  white-space: nowrap;
}

/* ===== Key Points / Callout Boxes ===== */
.callout {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 0.92rem;
  transition: filter 0.2s ease;
}

.callout:hover {
  filter: brightness(0.96);
}

.callout-info {
  background: #e8f0fe;
  border-left: 4px solid var(--accent-blue);
}

.callout-warning {
  background: #fef7e0;
  border-left: 4px solid var(--accent-gold);
}

.callout-danger {
  background: #fce8e6;
  border-left: 4px solid var(--stanford-cardinal);
}

.callout-success {
  background: #e6f4ea;
  border-left: 4px solid var(--accent-green);
}

.callout > strong:first-child {
  display: block;
  margin-bottom: 4px;
}

.key-points {
  background: #f7f5f0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
  transition: filter 0.2s ease;
}

.key-points:hover {
  filter: brightness(0.96);
}

.key-points h4 {
  color: var(--stanford-cardinal);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.key-points ul {
  margin-left: 16px;
}

.key-points li {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

/* ===== Practice Questions / Quiz ===== */
.practice-section {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin: 24px 0;
  border: 2px solid var(--accent-blue);
}

.practice-section h3 {
  color: var(--accent-blue);
  margin-bottom: 16px;
  font-size: 1.15rem;
}

.quiz-question {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.quiz-question:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.quiz-question .q-text {
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.quiz-question .q-number {
  color: var(--accent-blue);
  font-weight: 700;
}

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

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.92rem;
  line-height: 1.4;
}

.quiz-option:hover {
  border-color: var(--accent-blue);
  background: #f0f6ff;
}

.quiz-option input[type="radio"] {
  margin-top: 2px;
  accent-color: var(--accent-blue);
}

.quiz-option.selected {
  border-color: var(--accent-blue);
  background: #e8f0fe;
}

.quiz-option.correct {
  border-color: var(--accent-green);
  background: #e6f4ea;
}

.quiz-option.incorrect {
  border-color: var(--stanford-cardinal);
  background: #fce8e6;
}

.quiz-option.correct-answer {
  border-color: var(--accent-green);
  background: #e6f4ea;
}

.quiz-feedback {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  display: none;
}

.quiz-feedback.show {
  display: block;
}

.quiz-feedback.correct {
  background: #e6f4ea;
  color: #1e7e34;
  border: 1px solid #b7e1c3;
}

.quiz-feedback.incorrect {
  background: #fce8e6;
  color: #b71c1c;
  border: 1px solid #f5c6cb;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--stanford-cardinal);
  color: white;
}

.btn-primary:hover {
  background: #a01d1d;
}

.btn-secondary {
  background: white;
  color: var(--stanford-cardinal);
  border: 2px solid var(--stanford-cardinal);
}

.btn-secondary:hover {
  background: #fdf5f5;
}

.btn-success {
  background: var(--accent-green);
  color: white;
}

.btn-success:hover {
  background: #006d52;
}

.btn-group {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

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

/* ===== Scenario / Interactive Cards ===== */
.scenario-card {
  background: #fefaf5;
  border: 1px solid #e8dcc8;
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 16px 0;
}

.scenario-card .scenario-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
  font-weight: 700;
  margin-bottom: 8px;
}

.scenario-card .scenario-text {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== Flip Cards ===== */
.flip-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.flip-card {
  perspective: 1000px;
  height: 140px;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
}

.flip-card-front {
  background: var(--stanford-cardinal);
  color: white;
  font-size: 1.3rem;
  font-weight: 700;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.flip-card-back {
  background: white;
  border: 2px solid var(--stanford-cardinal);
  color: var(--stanford-dark);
  transform: rotateY(180deg);
  font-size: 0.85rem;
  line-height: 1.4;
}

.flip-card-front small {
  font-size: 0.7rem;
  opacity: 0.7;
  margin-top: 6px;
  font-family: 'Source Sans 3', sans-serif;
  font-weight: 400;
}

/* ===== Final Test ===== */
.test-header {
  text-align: center;
  margin-bottom: 24px;
}

.test-header h2 {
  border: none;
  padding: 0;
}

.test-timer {
  font-size: 1.1rem;
  color: var(--stanford-cool-gray);
  font-weight: 500;
}

.test-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  color: var(--stanford-cool-gray);
}

.test-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.test-progress-fill {
  height: 100%;
  background: var(--accent-blue);
  transition: width 0.3s ease;
}

.test-results {
  text-align: center;
  padding: 40px 20px;
}

.test-score {
  font-size: 3rem;
  font-weight: 700;
  margin: 16px 0;
}

.test-score.passing {
  color: var(--accent-green);
}

.test-score.failing {
  color: var(--stanford-cardinal);
}

/* ===== Certificate ===== */
.certificate-section {
  text-align: center;
  padding: 40px 20px;
}

.certificate-preview {
  background: white;
  border: 3px solid var(--stanford-stone);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin: 24px auto;
  max-width: 650px;
  box-shadow: var(--shadow-lg);
}

.certificate-preview .cert-title {
  font-size: 1.8rem;
  color: var(--stanford-cardinal);
  font-weight: 700;
  margin-bottom: 8px;
}

.certificate-preview .cert-subtitle {
  font-size: 1rem;
  color: var(--stanford-cool-gray);
  margin-bottom: 24px;
}

.certificate-preview .cert-name {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--stanford-dark);
  border-bottom: 2px solid var(--stanford-stone);
  display: inline-block;
  padding-bottom: 4px;
  min-width: 300px;
}

.certificate-preview .cert-detail {
  font-size: 0.95rem;
  color: var(--stanford-cool-gray);
  margin-top: 16px;
}

.cert-name-input {
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 1.1rem;
  width: 100%;
  max-width: 400px;
  text-align: center;
  font-family: inherit;
  margin: 16px 0;
}

.cert-name-input:focus {
  outline: none;
  border-color: var(--stanford-cardinal);
}

/* ===== Drag & Drop matching ===== */
.matching-container {
  display: flex;
  gap: 24px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.matching-column {
  flex: 1;
  min-width: 250px;
}

.matching-column h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--stanford-cool-gray);
  margin-bottom: 10px;
}

.matching-item {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 0.9rem;
  background: white;
  cursor: grab;
  transition: all var(--transition);
}

.matching-item:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
}

.matching-item.dragging {
  opacity: 0.5;
}

.drop-zone {
  min-height: 50px;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 8px;
  margin-bottom: 8px;
  transition: all var(--transition);
}

.drop-zone.over {
  border-color: var(--accent-blue);
  background: #f0f6ff;
}

.drop-zone .matching-item {
  margin-bottom: 0;
}

/* ===== Tabs ===== */
.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 20px;
  gap: 0;
  overflow-x: auto;
}

.tab-btn {
  padding: 10px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--stanford-cool-gray);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all var(--transition);
}

.tab-btn:hover {
  color: var(--stanford-cardinal);
}

.tab-btn.active {
  color: var(--stanford-cardinal);
  border-bottom-color: var(--stanford-cardinal);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ===== Expand/Collapse ===== */
.expandable {
  margin: 8px 0;
  border-radius: var(--radius);
  transition: background 0.2s ease;
}

.expandable:hover {
  background: rgba(0, 0, 0, 0.025);
}

.expandable-header {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 10px 14px;
  background: #f7f5f0;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  transition: background 0.2s ease;
}

.expandable-header:hover {
  background: #eee9e0;
}

.expandable-header .arrow {
  transition: transform 0.25s ease;
  font-size: 0.8rem;
  display: inline-block;
}

.expandable.open .arrow {
  transform: rotate(90deg);
}

.expandable-body {
  overflow: hidden;
  height: 0;
  opacity: 0;
  padding: 0 14px;
  transition: height 0.4s ease-in-out, opacity 0.35s ease, padding 0.4s ease-in-out;
}

/* ===== Back / Nav Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.88rem;
}

.breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
  cursor: pointer;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: var(--border-color);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .main-content {
    padding: 4px;
  }

  .module-page {
    padding: 10px;
  }

  .module-hero-image {
    margin: -10px -10px 16px -10px;
    max-height: 160px;
  }

  .module-hero-image img {
    height: 160px;
  }

  .module-nav {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .header-top {
    padding: 8px 10px;
  }

  .header-top h1 {
    font-size: 0.9rem;
    gap: 4px;
  }

  .expandable-header {
    padding: 8px 8px;
  }

  .callout {
    padding: 10px 10px;
  }

  .key-points {
    padding: 10px 10px;
  }

  .matching-container {
    flex-direction: column;
  }

  .flip-card-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .code-table {
    font-size: 0.8rem;
  }

  .code-table th, .code-table td {
    padding: 5px 6px;
  }

  .emcalc-domains {
    grid-template-columns: 1fr;
  }

  .course-card {
    padding: 12px 10px;
  }

  .course-card-image {
    margin: -12px -10px 12px -10px;
    height: 120px;
  }

  .module-card {
    padding: 10px;
  }

  .module-card-image {
    margin: -10px -10px 10px -10px;
    height: 110px;
  }

  .welcome-section {
    padding: 14px 6px 8px;
  }

  .welcome-section .reset-all-btn {
    position: static !important;
    display: flex;
    width: max-content;
    margin: 0 0 12px auto;
  }

  .module-page h3,
  .module-page > p,
  .module-page > ul,
  .module-page > ol {
    margin-left: -2px;
    margin-right: -2px;
    padding-left: 2px;
    padding-right: 2px;
  }

  .module-page ul, .module-page ol {
    margin-left: 14px;
  }

  .expandable-body {
    padding: 0 6px;
  }

  .expandable.open .expandable-body {
    padding: 8px 6px;
  }

  .hidden-content {
    padding: 0 2px;
  }

  .progress-bar-ref,
  .progress-bar-label,
  .progress-bar-reset {
    font-size: 0.65rem;
  }
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

.slide-in {
  animation: slideIn 0.3s ease;
}

/* ===== Search Reference ===== */
.search-hint {
  background: linear-gradient(135deg, #f0f6ff, #e8f0fe);
  border: 1px solid #b8d4fe;
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 16px 0;
}

.search-hint h4 {
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.search-hint a {
  color: var(--accent-blue);
  font-weight: 600;
}

/* ===== Score Badge ===== */
.score-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.score-badge.pass {
  background: #e6f4ea;
  color: var(--accent-green);
}

.score-badge.fail {
  background: #fce8e6;
  color: var(--stanford-cardinal);
}

/* ===== Toggle / Reveal ===== */
.reveal-btn {
  background: none;
  border: 1px dashed var(--accent-blue);
  color: var(--accent-blue);
  padding: 6px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.88rem;
  margin-top: 8px;
  transition: all var(--transition);
}

.reveal-btn:hover {
  background: #f0f6ff;
}

.hidden-content {
  overflow: hidden;
  height: 0;
  opacity: 0;
  transition: height 0.4s ease-in-out, opacity 0.35s ease;
}

/* ===== Login Overlay ===== */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(46, 45, 41, 0.85);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-overlay.hidden {
  display: none;
}

.login-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 540px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.disclaimer-text {
  text-align: left;
  background: #fef7e0;
  border: 1px solid #e8dcc8;
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--stanford-dark);
  max-height: 260px;
  overflow-y: auto;
}

.disclaimer-text strong {
  color: var(--stanford-cardinal);
}

.disclaimer-text p {
  margin: 8px 0;
}

.disclaimer-text p:first-child {
  margin-top: 0;
}

.login-error {
  color: var(--stanford-cardinal);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 8px;
  display: none;
}

.login-error.show {
  display: block;
}

/* ===== Footer ===== */
.app-footer {
  text-align: center;
  padding: 16px 24px;
  font-size: 0.8rem;
  color: var(--stanford-cool-gray);
  border-top: 1px solid var(--border-color);
  background: white;
}

.app-footer p {
  max-width: 700px;
  margin: 0 auto;
}

/* ===== Compliance Banner ===== */
.compliance-note {
  background: #f7f5f0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.82rem;
  color: var(--stanford-cool-gray);
  text-align: center;
  margin-top: 20px;
  font-style: italic;
}

/* ===== Expand / Zoom View (Slide Mode) ===== */
.expandable-section {
  position: relative;
}

.zoom-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--stanford-cardinal);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition);
  z-index: 10;
}

.zoom-btn:hover {
  opacity: 1;
}

.zoom-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: white;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: default;
}

.zoom-overlay .zoom-content {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 60px;
  overflow: auto;
  position: relative;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .zoom-overlay .zoom-content {
    padding: 48px 10px;
  }

  .zoom-overlay .zoom-inner {
    font-size: 1.4rem;
  }
}

.zoom-overlay .zoom-inner {
  width: 100%;
  font-size: 2rem;
  line-height: 1.5;
}

.zoom-overlay .zoom-inner * {
  font-size: inherit !important;
  line-height: inherit !important;
}

.zoom-overlay .zoom-inner .code-table th,
.zoom-overlay .zoom-inner .code-table td {
  padding: 16px 20px;
}

.zoom-overlay .zoom-inner ul,
.zoom-overlay .zoom-inner ol {
  margin-left: 1.5em;
}

.zoom-overlay .zoom-inner li {
  margin-bottom: 0.3em;
}

.zoom-overlay .zoom-inner h4 {
  font-size: 1.1em !important;
  margin-bottom: 0.4em;
}

.zoom-overlay .zoom-inner input[type="radio"] {
  -webkit-appearance: radio !important;
  appearance: radio !important;
  width: 1.5em !important;
  height: 1.5em !important;
  min-width: 1.5em !important;
  min-height: 1.5em !important;
  margin: 0.15em 0 0 0 !important;
  flex-shrink: 0;
  font-size: 1rem !important;
  accent-color: var(--accent-blue);
  cursor: pointer;
}

.zoom-overlay .zoom-inner .quiz-option {
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.zoom-overlay .zoom-inner .quiz-feedback {
  margin-top: 0.5em;
  padding: 0.5em 0.7em;
}

.zoom-overlay .zoom-close {
  position: fixed;
  top: 16px;
  right: 24px;
  background: var(--stanford-cardinal);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  z-index: 310;
  box-shadow: var(--shadow-md);
}

.zoom-overlay .zoom-close:hover {
  background: #a01d1d;
}

/* ===== AI Chat Interface ===== */
.ai-chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
  min-height: 500px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.ai-chat-header {
  padding: 20px 24px 12px;
  border-bottom: 1px solid var(--border-color);
}

.ai-chat-header h2 {
  color: var(--accent-blue);
  margin-bottom: 4px;
  font-size: 1.3rem;
}

.ai-chat-header p {
  font-size: 0.9rem;
  color: var(--stanford-cool-gray);
  margin-bottom: 8px;
}

.ai-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-message {
  max-width: 85%;
  animation: fadeIn 0.2s ease;
}

.ai-message.user {
  align-self: flex-end;
}

.ai-message.assistant {
  align-self: flex-start;
}

.ai-message.user .ai-message-content {
  background: var(--stanford-cardinal);
  color: white;
  border-radius: 16px 16px 4px 16px;
  padding: 10px 16px;
  font-size: 0.92rem;
}

.ai-message.assistant .ai-message-content {
  background: var(--stanford-light-bg);
  color: var(--stanford-dark);
  border-radius: 16px 16px 16px 4px;
  padding: 14px 18px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.ai-message.assistant .ai-message-content p {
  margin: 6px 0;
}

.ai-message.assistant .ai-message-content ul,
.ai-message.assistant .ai-message-content ol {
  margin: 6px 0 6px 18px;
}

.ai-message.assistant .ai-message-content li {
  margin-bottom: 4px;
}

.ai-message.assistant .ai-message-content code {
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.88em;
}

.ai-message.assistant .ai-message-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 12px 0 8px;
}

.ai-message.assistant .ai-message-content h3,
.ai-message.assistant .ai-message-content h4 {
  margin: 12px 0 6px;
  color: var(--stanford-cardinal);
}

.ai-input-area {
  display: flex;
  gap: 10px;
  padding: 12px 24px 16px;
  border-top: 1px solid var(--border-color);
  background: white;
}

.ai-chat-input {
  flex: 1;
  padding: 10px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.ai-chat-input:focus {
  border-color: var(--accent-blue);
}

.ai-suggestion {
  color: var(--accent-blue);
  cursor: pointer;
  text-decoration: none;
}

.ai-suggestion:hover {
  text-decoration: underline;
}

/* Loading dots */
.ai-loading {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}

.ai-loading span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--stanford-cool-gray);
  animation: aiDot 1.2s infinite;
}

.ai-loading span:nth-child(2) { animation-delay: 0.2s; }
.ai-loading span:nth-child(3) { animation-delay: 0.4s; }

@keyframes aiDot {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

.ai-loading-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  color: var(--stanford-cool-gray);
  font-size: 0.9rem;
}

/* Module links in AI responses */
.ai-module-links {
  padding: 8px 14px;
  margin-top: 8px;
  font-size: 0.85rem;
  background: #f0f6ff;
  border-radius: var(--radius);
}

.module-link {
  color: var(--accent-blue);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  margin: 0 4px;
}

.module-link:hover {
  text-decoration: underline;
}

/* ===== Procedure Query ===== */
.procedure-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition);
}

.procedure-textarea:focus {
  border-color: var(--accent-gold);
}

.procedure-result h3 {
  color: var(--stanford-dark);
  margin: 20px 0 8px;
  font-size: 1.05rem;
}

/* ===== E&M Calculator ===== */
.emcalc-overall {
  text-align: center;
  padding: 16px;
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease;
}

.emcalc-overall strong {
  transition: color 0.4s ease;
}

/* Level change pulse */
@keyframes emcalc-pulse {
  0% { transform: scale(1); }
  40% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.emcalc-level-pulse {
  animation: emcalc-pulse 0.35s ease;
}

/* Expand/collapse animation */
.emcalc-collapsible {
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.25s ease;
  max-height: 0;
  opacity: 0;
}

.emcalc-collapsible.emcalc-expanded {
  max-height: 2000px;
  opacity: 1;
}

/* Arrow rotation */
.emcalc-scenario-arrow {
  transition: transform 0.25s ease;
}

.emcalc-scenario-arrow.emcalc-arrow-open {
  transform: rotate(90deg);
}

.emcalc-scenarios {
  margin-bottom: 16px;
}

.emcalc-scenarios h4 {
  margin-bottom: 8px;
}

.emcalc-scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}

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

.emcalc-scenario-group {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.emcalc-scenario-header {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.15s ease;
}

.emcalc-scenario-header:hover {
  background: rgba(0,0,0,0.04);
}

.emcalc-scenario-arrow {
  font-size: 0.65rem;
  color: var(--stanford-cool-gray);
  width: 12px;
  flex-shrink: 0;
  align-self: flex-start;
  line-height: 1.6;
  display: inline-block;
}

.emcalc-scenario-type {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--stanford-cool-gray);
}

.emcalc-group-count {
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--accent-green);
  color: white;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0 4px;
}

.emcalc-data-group-header {
  margin-bottom: 4px;
}

.emcalc-scenario-items {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px 0 4px 24px;
}

.emcalc-btn {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: white;
  color: var(--stanford-dark);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.emcalc-btn:hover {
  border-color: var(--stanford-cardinal);
  background: #fef8f8;
}

.emcalc-btn-active {
  background: var(--accent-green);
  color: white;
  border-color: var(--accent-green);
}

.emcalc-btn-active:hover {
  background: #006b52;
  border-color: #006b52;
}

.emcalc-count-indicator {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  opacity: 0.7;
  margin-left: 4px;
}

.emcalc-btn-sm {
  padding: 2px 8px;
  font-size: 0.75rem;
}

.emcalc-domains {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

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

.emcalc-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: visible;
}

.emcalc-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #fafaf8;
  border-bottom: 1px solid var(--border-color);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.emcalc-card-header h4 {
  margin: 0;
  font-size: 1rem;
}

.em-info-btn {
  position: relative;
  cursor: help;
  font-size: 1.1rem;
  color: var(--accent-blue);
  line-height: 1;
}

.em-info-balloon {
  display: none;
  position: absolute;
  text-transform: none;
  letter-spacing: normal;
  right: 0;
  top: 100%;
  margin-top: 8px;
  width: 340px;
  padding: 14px 16px;
  background: var(--stanford-dark);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 400;
  line-height: 1.5;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.em-info-btn:hover .em-info-balloon,
.em-info-btn:focus .em-info-balloon {
  display: block;
}

.emcalc-level-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 4px;
  white-space: nowrap;
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.emcalc-card-body {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.emcalc-data-section {
  margin-bottom: 12px;
  padding: 4px 6px;
  border-radius: 6px;
  transition: background 0.15s ease;
}

.emcalc-data-section:hover {
  background: rgba(0, 0, 0, 0.03);
}

.emcalc-data-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--stanford-cool-gray);
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-color);
}

.emcalc-data-cat {
  margin-bottom: 8px;
}

.emcalc-data-cat-name {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.emcalc-data-options {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* ===== Share Button ===== */
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 3px 10px;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--stanford-cool-gray);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.share-btn:hover {
  border-color: var(--stanford-cardinal);
  color: var(--stanford-cardinal);
}

/* ===== Game: Coding Line Builder ===== */
.clb-line {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: white;
  flex-wrap: wrap;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.clb-line:not(.clb-line-correct):not(.clb-line-partial):not(.clb-line-extra):not(.clb-line-empty):hover {
  border-color: var(--stanford-cardinal);
  box-shadow: 0 2px 8px rgba(140, 21, 21, 0.12);
  transform: translateY(-1px);
}

.clb-line-correct { border-color: var(--accent-green); background: #e6f4ea; }
.clb-line-partial { border-color: var(--accent-gold); background: #fef7e0; }
.clb-line-extra { border-color: var(--stanford-cardinal); background: #fce8e6; }
.clb-line-empty { border-color: var(--border-color); opacity: 0.5; }

.clb-line-num {
  background: var(--stanford-cardinal);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.clb-select {
  padding: 6px 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.82rem;
  background: white;
  min-width: 0;
  flex: 1;
}

.clb-select:focus {
  outline: none;
  border-color: var(--stanford-cardinal);
}

.clb-modifiers {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.clb-chip {
  padding: 3px 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: white;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.clb-chip:hover {
  border-color: var(--stanford-cardinal);
}

.clb-chip-active {
  background: var(--accent-green);
  color: white;
  border-color: var(--accent-green);
}

.clb-chip:disabled {
  cursor: default;
  opacity: 0.7;
}

.clb-remove {
  background: none;
  border: none;
  color: var(--stanford-cool-gray);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.clb-remove:hover { color: var(--stanford-cardinal); }

.clb-add-line {
  display: block;
  width: 100%;
  padding: 10px;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  background: none;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--stanford-cool-gray);
  cursor: pointer;
  transition: all 0.15s ease;
  margin-top: 4px;
}

.clb-add-line:hover {
  border-color: var(--stanford-cardinal);
  color: var(--stanford-cardinal);
}

.clb-feedback {
  font-size: 0.82rem;
  padding: 4px 10px 4px 42px;
  margin-bottom: 8px;
}

.clb-feedback-correct { color: var(--accent-green); }
.clb-feedback-partial { color: #b8860b; }
.clb-feedback-extra { color: var(--stanford-cardinal); }
.clb-feedback-empty { color: var(--stanford-cool-gray); }

.clb-score {
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin: 16px 0;
  color: var(--stanford-dark);
}

@media (max-width: 768px) {
  .clb-line {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  .clb-line-num {
    align-self: flex-start;
  }
  .clb-modifiers {
    width: 100%;
  }
}

/* ===== Game: Case Walkthrough ===== */
.cw-progress {
  font-size: 0.78rem;
  color: var(--stanford-cool-gray);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.cw-case-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--stanford-dark);
  margin-bottom: 8px;
}

.cw-patient-summary {
  font-size: 0.92rem;
  color: var(--stanford-cool-gray);
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.5;
}

.cw-level-bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  position: sticky;
  top: 48px;
  z-index: 40;
  background: white;
  padding: 56px 0 10px;
  border-bottom: 1px solid var(--border-color);
}

.cw-bar-case-info {
  flex: 1;
  min-width: 0;
  align-self: flex-start;
}

.cw-bar-case-info .cw-progress {
  margin-bottom: 2px;
}

.cw-bar-case-info .cw-case-title {
  font-size: 1rem;
  margin-bottom: 2px;
}

.cw-bar-case-info .cw-patient-summary {
  font-size: 0.8rem;
  margin-bottom: 0;
  line-height: 1.3;
}

.cw-bar-levels {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex-shrink: 0;
  align-self: flex-end;
}

.cw-level-overall {
  text-align: center;
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease;
}

.cw-level-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cw-level-overall strong {
  font-size: 1.3rem;
}

.cw-domain-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cw-domain-badge-wrap {
  position: relative;
}

.cw-domain-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

@keyframes cw-pulse {
  0% { transform: scale(1); }
  30% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

.cw-badge-pulse {
  animation: cw-pulse 0.4s ease;
}

.cw-domain-name {
  opacity: 0.7;
  font-weight: 400;
  margin-right: 2px;
}

/* Domain change popup balloon */
.cw-popup {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: white;
  border-radius: 5px;
  padding: 4px 8px;
  box-shadow: 0 3px 12px rgba(0,0,0,0.15);
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 50;
  animation: cw-popup-enter 0.3s ease;
  border: 1.5px solid;
  line-height: 1.3;
  white-space: normal;
  min-width: 280px;
}

/* Triangle pointer — border edge */
.cw-popup::before {
  content: '';
  position: absolute;
  bottom: -9px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid;
  border-top-color: inherit;
}

/* Triangle pointer — white fill */
.cw-popup::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 7px solid white;
}

.cw-popup-up {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.cw-popup-down {
  border-color: var(--stanford-cardinal);
  color: var(--stanford-cardinal);
}

.cw-popup-arrow {
  font-size: 0.7rem;
}

.cw-popup-reason {
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--stanford-dark);
  margin-top: 1px;
  display: inline;
}

@keyframes cw-popup-enter {
  from { opacity: 0; transform: translateX(-50%) translateY(-6px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.cw-popup-fade {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.emcalc-popup {
  left: auto;
  right: 0;
  transform: none;
  animation: emcalc-popup-enter 0.3s ease;
}

@keyframes emcalc-popup-enter {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.emcalc-popup::before,
.emcalc-popup::after {
  left: auto;
  right: 16px;
  transform: none;
}

@media (max-width: 768px) {
  .cw-popup {
    white-space: normal;
    min-width: 180px;
    left: 0;
    transform: none;
  }
  .cw-popup::before,
  .cw-popup::after {
    left: 20px;
    transform: none;
  }
  .emcalc-popup {
    left: 0;
    right: auto;
  }
  .emcalc-popup::before,
  .emcalc-popup::after {
    left: 20px;
    right: auto;
  }
}

.cw-step-card {
  background: #fafaf8;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}

.cw-narrative {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.cw-hint {
  font-size: 0.85rem;
  color: var(--accent-blue);
  font-weight: 600;
  margin-bottom: 12px;
}

.cw-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cw-action {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s ease;
  background: white;
  font-size: 0.9rem;
}

.cw-action:hover {
  border-color: var(--stanford-cardinal);
  background: #fef8f8;
}

.cw-action-checked {
  border-color: var(--accent-green);
  background: #e6f4ea;
}

.cw-action-check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--accent-green);
  flex-shrink: 0;
}

.cw-action-checked .cw-action-check {
  border-color: var(--accent-green);
  background: var(--accent-green);
  color: white;
}

.cw-nav {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.cw-summary {
  margin-top: 8px;
}

.cw-domain-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 12px 0 16px;
}

.cw-breakdown-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
}

.cw-breakdown-level {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 4px;
}

@media (max-width: 768px) {
  .cw-level-bar { flex-direction: column; align-items: stretch; }
  .cw-bar-levels { flex-wrap: wrap; }
  .cw-domain-breakdown { grid-template-columns: 1fr; }
  .cw-step-card { padding: 12px; }
}

/* ===== Game: Add-on Code Builder ===== */
.vp-progress {
  font-size: 0.78rem;
  color: var(--stanford-cool-gray);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.vp-scenario-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--stanford-dark);
  margin-bottom: 10px;
}

.vp-difficulty {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 6px;
}

.vp-difficulty-standard { background: #e8f0fe; color: var(--accent-blue); }
.vp-difficulty-tricky { background: #fef7e0; color: #b8860b; }

.vp-visit-card {
  background: #fafaf8;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  margin-bottom: 6px;
}

.vp-visit-row {
  display: flex;
  gap: 8px;
  padding: 3px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  font-size: 0.85rem;
}

.vp-visit-row:last-of-type { border-bottom: none; }

.vp-visit-label {
  font-weight: 600;
  color: var(--stanford-cool-gray);
  min-width: 120px;
  flex-shrink: 0;
}

.vp-visit-value {
  color: var(--stanford-dark);
}

.vp-visit-activities {
  margin-top: 6px;
  font-size: 0.82rem;
}

.vp-visit-activities ul {
  margin: 4px 0 0 16px;
  columns: 2;
  column-gap: 20px;
}

.vp-visit-activities li {
  margin-bottom: 2px;
  break-inside: avoid;
}

.vp-code-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

@media (max-width: 768px) {
  .vp-code-grid { grid-template-columns: 1fr; }
  .vp-visit-label { min-width: 90px; }
  .vp-visit-card { padding: 12px; }
}

.vp-code-option {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: white;
}

.vp-code-option:hover:not(.vp-code-excluded):not(.vp-code-correct):not(.vp-code-wrong):not(.vp-code-missed) {
  border-color: var(--stanford-cardinal);
  background: #fef8f8;
}

.vp-code-selected {
  border-color: var(--accent-green);
  background: #e6f4ea;
}

.vp-code-excluded {
  opacity: 0.5;
  cursor: not-allowed;
  background: #f5f5f5;
}

.vp-code-correct {
  border-color: var(--accent-green);
  background: #e6f4ea;
}

.vp-code-wrong {
  border-color: var(--stanford-cardinal);
  background: #fce8e6;
}

.vp-code-missed {
  border-color: var(--accent-gold);
  background: #fef7e0;
}

.vp-code-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.vp-code-header strong {
  font-size: 1rem;
  color: var(--stanford-cardinal);
}

.vp-code-label {
  font-size: 0.82rem;
  color: var(--stanford-cool-gray);
}

.vp-code-desc {
  font-size: 0.78rem;
  color: var(--stanford-cool-gray);
  font-style: italic;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.vp-code-conflict {
  font-size: 0.78rem;
  color: var(--stanford-cardinal);
  font-weight: 600;
  margin-bottom: 6px;
}

.vp-reqs {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.vp-req {
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.vp-req-met { color: var(--accent-green); }
.vp-req-unmet { color: var(--stanford-cardinal); }

/* Time allocation bar */
.vp-timebar {
  display: flex;
  height: 18px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: #f0efec;
  width: 200px;
  flex-shrink: 0;
}

.vp-timebar-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.65rem;
  font-weight: 600;
  transition: width 0.4s ease;
  overflow: hidden;
  white-space: nowrap;
}

.vp-timebar-unassigned {
  background: #e8e6e1;
  color: var(--stanford-cool-gray);
}

.vp-timebar-label {
  padding: 0 4px;
}

.vp-timebar-overflow {
  border-color: var(--stanford-cardinal);
  animation: vp-overflow-pulse 0.5s ease;
}

@keyframes vp-overflow-pulse {
  0% { box-shadow: none; }
  50% { box-shadow: 0 0 0 3px rgba(140, 21, 21, 0.25); }
  100% { box-shadow: none; }
}

.vp-timebar-total-inline {
  font-size: 0.72rem;
  color: var(--stanford-cool-gray);
  font-weight: 600;
  margin-left: 6px;
  white-space: nowrap;
}

.vp-timebar-warning {
  font-size: 0.72rem;
  color: var(--stanford-cardinal);
  font-weight: 600;
  white-space: nowrap;
  margin-left: 6px;
}

/* E&M level selector for time-based billing */
.vp-em-level-btns {
  display: flex;
  gap: 8px;
}

.vp-em-level-btn {
  padding: 6px 14px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  background: white;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--stanford-dark);
}

.vp-em-level-btn:hover {
  border-color: var(--accent-gold);
  background: #fef7e0;
}

.vp-em-level-selected {
  border-color: var(--accent-gold);
  background: var(--accent-gold);
  color: white;
}

.vp-em-level-selected:hover {
  background: #c89c0a;
  border-color: #c89c0a;
}

.vp-em-level-btn:disabled {
  cursor: default;
  opacity: 0.7;
}

.vp-em-level-time {
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.8;
}

.vp-timebar-footnotes {
  display: inline-flex;
  gap: 6px;
  margin-left: 6px;
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
}

.vp-timebar-fn sup {
  font-size: 0.55rem;
  margin-right: 1px;
}

/* ===== Print ===== */
@media print {
  .app-header, .btn-group, .breadcrumb, .practice-section, .login-overlay, .app-footer {
    display: none;
  }

  .module-page {
    box-shadow: none;
    padding: 0;
  }
}

/* Progress toast */
.progress-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-30px);
  background: var(--accent-green);
  color: #fff;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  z-index: 1000;
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
  display: flex;
  gap: 12px;
  align-items: center;
  pointer-events: none;
}

.progress-toast-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.progress-toast-hide {
  transform: translateX(-50%) translateY(-30px);
  opacity: 0;
}