/* Quant Green Book — Coursera Career Academy–inspired layout */

:root {
    --coursera-blue: #0056d2;
    --coursera-blue-hover: #00419e;
    --coursera-blue-light: #e8f0fe;
    --page-bg: #ffffff;
    --section-alt: #f5f7f8;
    --text-primary: #1c1d1f;
    --text-muted: #6a6f73;
    --border: #d1d7dc;
    --card-bg: #ffffff;
    --accent-green: #1a7f37;
    --accent-green-bg: #eefbf0;
    --accent-red: #b32d0e;
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --max-width: 1140px;
    --header-height: 64px;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1rem;
    background: var(--page-bg);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

a { color: var(--coursera-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
    color: var(--text-primary);
    margin-top: 0;
    font-weight: 700;
    line-height: 1.2;
}

/* ── Layout shell ── */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.content-panel { display: block; }

.page-section {
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
}

.page-section--alt {
    background: var(--section-alt);
}

.page-section--tight {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.mb-lg { margin-bottom: 2rem; }
.mt-md { margin-top: 1.25rem; }
.m-0 { margin: 0; }

.hero-title--sm { font-size: 2rem; }

.media-banner {
    max-width: 720px;
    margin-bottom: 1.5rem;
}

.section-heading--sm { font-size: 1.25rem; }

.section-heading {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
}

.section-lead {
    color: var(--text-muted);
    margin: 0 0 1.5rem;
    max-width: 42rem;
}

.is-hidden { display: none !important; }

/* ── Header ── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--page-bg);
    border-bottom: 1px solid var(--border);
    min-height: var(--header-height);
}

.site-header__inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: var(--header-height);
}

.logo-link {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-link:hover { text-decoration: none; }

.site-logo { height: 44px; width: auto; }

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1;
}

.site-nav a {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    padding: 0.25rem 0;
}

.site-nav a:hover { color: var(--coursera-blue); text-decoration: none; }

.auth-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.user-name {
    color: var(--text-muted);
    font-size: 0.875rem;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ── Footer ── */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--section-alt);
    padding: 2rem 0;
}

.site-footer p {
    margin: 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ── Hero (split layout) ── */
.hero-banner {
    padding-top: 2rem;
    padding-bottom: 2.5rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
}

.hero-title {
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    font-weight: 700;
    margin: 0 0 0.75rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem;
    max-width: 34rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-media {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    aspect-ratio: 16 / 10;
    background: var(--section-alt);
}

.hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Compact hero for inner pages */
.hero-compact {
    padding-top: 1.5rem;
    padding-bottom: 1rem;
}

.hero-compact .hero-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
}

/* ── Filter chips ── */
.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.chip {
    appearance: none;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.2;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--page-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.chip:hover { border-color: var(--text-primary); }

.chip.active,
.chip[aria-pressed="true"] {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: #fff;
}

/* ── Role / exam cards (image + body) ── */
.role-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.role-card {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    color: var(--text-primary);
    text-decoration: none;
    transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
    height: 100%;
}

.role-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--coursera-blue);
    text-decoration: none;
    transform: translateY(-2px);
}

.role-card__media {
    aspect-ratio: 16 / 9;
    background: var(--section-alt);
    overflow: hidden;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.role-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.role-card__body {
    padding: 1rem 1.125rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.role-card__level {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.35rem;
}

.role-card__title {
    font-size: 1.0625rem;
    font-weight: 700;
    margin: 0 0 0.35rem;
}

.role-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.45;
    margin: 0;
    flex: 1;
}

.role-card--soon {
    cursor: default;
    opacity: 0.92;
}

.role-card--soon:hover {
    box-shadow: none;
    border-color: var(--border);
    transform: none;
}

.role-card__badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1;
    padding: 0.25rem 0.625rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #fff;
    background: var(--text-muted);
    border-radius: var(--radius-sm);
}

/* ── Intent tiles ── */
.intent-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.intent-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.intent-card:hover {
    border-color: var(--coursera-blue);
    background: var(--coursera-blue-light);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.intent-card__icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

/* ── Resource cards ── */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.resource-card {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    transition: box-shadow 0.2s, border-color 0.2s;
    height: 100%;
}

.resource-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--coursera-blue);
    text-decoration: none;
}

.resource-card__media {
    aspect-ratio: 16 / 9;
    background: var(--section-alt);
    overflow: hidden;
}

.resource-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.resource-card__body {
    padding: 1rem 1.125rem 1.25rem;
}

.resource-card__body h3 {
    font-size: 1rem;
    margin: 0 0 0.5rem;
}

.resource-card__body p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.45;
}

.resource-card--static {
    pointer-events: none;
}

.resource-card--static:hover {
    box-shadow: none;
    border-color: var(--border);
}

/* ── Story cards ── */
.story-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.story-card {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.story-card__avatar {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--border);
}

.story-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.story-card__content blockquote {
    margin: 0 0 0.5rem;
    font-size: 0.9375rem;
    font-style: italic;
    line-height: 1.55;
    color: var(--text-primary);
}

.story-card__content cite {
    display: block;
    font-size: 0.8125rem;
    font-style: normal;
    font-weight: 700;
    color: var(--text-muted);
}

/* ── Exam detail page ── */
.exam-detail__level {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--coursera-blue);
    margin: 0 0 0.5rem;
}

.exam-detail__stands-for {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.35rem;
}

.exam-detail__summary {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin: 1rem 0 0;
    max-width: 42rem;
}

.exam-soon-banner {
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--section-alt);
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.exam-facts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem 2rem;
    margin: 0 0 2.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--section-alt);
}

.exam-facts__item {
    margin: 0;
}

.exam-facts dt {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.exam-facts dd {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--text-primary);
}

/* ── Exam menu tiles ── */
.action-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.action-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    font-weight: 700;
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.action-card:hover {
    border-color: var(--coursera-blue);
    background: var(--coursera-blue-light);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.action-card__icon {
    width: 45%;
    height: auto;
    aspect-ratio: 1/1;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.action-card__text {
    flex: 1;
    font-size: 1.125rem;
    line-height: 1.3;
}

/* ── Chapter List ── */
.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 800px;
}

.chapter-row {
    display: flex;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s, background 0.15s;
}

.chapter-row:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--coursera-blue);
    background: var(--coursera-blue-light);
    text-decoration: none;
}

.chapter-row__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    background: var(--section-alt);
    color: var(--text-muted);
    border-radius: 50%;
    margin-right: 1.25rem;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.chapter-row:hover .chapter-row__icon {
    background: var(--coursera-blue);
    color: #ffffff;
}

.chapter-row__content {
    flex: 1;
}

.chapter-row__title {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.chapter-row__action {
    color: var(--coursera-blue);
    font-weight: 600;
    font-size: 0.875rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.2s, transform 0.2s;
}

.chapter-row:hover .chapter-row__action {
    opacity: 1;
    transform: translateX(0);
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6875rem 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: var(--coursera-blue);
    color: #fff;
    font-family: inherit;
    font-weight: 700;
    font-size: 0.9375rem;
    line-height: 1.2;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn:hover {
    background: var(--coursera-blue-hover);
    text-decoration: none;
    color: #fff;
}

.btn-outline {
    background: transparent;
    border-color: var(--coursera-blue);
    color: var(--coursera-blue);
}

.btn-outline:hover {
    background: var(--coursera-blue-light);
    color: var(--coursera-blue);
}

.btn-ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--text-primary);
}

.btn-ghost:hover {
    background: var(--section-alt);
    color: var(--text-primary);
}

.text-muted { color: var(--text-muted); }

.breadcrumb {
    font-size: 0.875rem;
    margin: 0 0 1rem;
}

.breadcrumb a { font-weight: 600; }

.markdown-body {
    line-height: 1.7;
    max-width: 720px;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.markdown-body pre, .markdown-body img {
    max-width: 100%;
    overflow-x: auto;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 { margin-top: 1.5rem; }

/* ── Quiz ── */
.mc-question-text {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid var(--coursera-blue);
}

.mc-options { display: flex; flex-direction: column; gap: 0.75rem; }

.mc-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.mc-option:hover { border-color: var(--coursera-blue); box-shadow: var(--shadow-sm); }
.mc-option.correct { border-color: var(--accent-green); background: var(--accent-green-bg); }
.mc-option.incorrect { opacity: 0.55; }

.mc-option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--coursera-blue-light);
    color: var(--coursera-blue);
    font-weight: 700;
    flex-shrink: 0;
}

.mc-option-text {
    flex: 1;
    color: var(--text-primary);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.mc-explanation {
    margin-top: 1.5rem;
    background: var(--accent-green-bg);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    border-left: 4px solid var(--accent-green);
}

.mc-explanation-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.mc-explanation .markdown-body {
    font-size: 0.9375rem;
    line-height: 1.6;
    max-width: none;
}

.mc-explanation .markdown-body p {
    margin: 0.65rem 0;
}

.mc-explanation .markdown-body p:first-child {
    margin-top: 0;
}

.mc-explanation .markdown-body ul,
.mc-explanation .markdown-body ol {
    margin: 0.5rem 0 0.75rem;
    padding-left: 1.25rem;
}

.mc-explanation .markdown-body li {
    margin-bottom: 0.35rem;
}

.mc-explanation .markdown-body a {
    color: var(--coursera-blue);
    font-weight: 600;
    text-decoration: underline;
}

.mc-explanation .markdown-body a:hover {
    text-decoration: none;
}

.mc-explanation .markdown-body strong {
    font-weight: 700;
}

.fc-back .markdown-body {
    text-align: left;
}

.mc-hint {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: #fef3f0;
    border-radius: var(--radius-md);
    color: var(--accent-red);
    font-style: italic;
    border: 1px solid #f5c4b8;
}

.fc-card-wrap { perspective: 1200px; max-width: 640px; margin: 0 auto; }

.fc-card {
    position: relative;
    height: 60vh;
    min-height: 400px;
    transform-style: preserve-3d;
    transition: transform 0.5s;
}

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

.fc-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    text-align: center;
    border: 1px solid var(--border);
    overflow-y: auto;
    overflow-x: hidden;
}

.fc-front { background: var(--card-bg); box-shadow: var(--shadow-sm); }

.fc-back {
    transform: rotateY(180deg);
    background: var(--accent-green-bg);
    border-color: #9dd9a8;
}

.fc-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.fc-label-answer { color: var(--accent-green); }
.fc-question { font-size: 1.15rem; font-weight: 700; line-height: 1.4; }
.fc-answer { font-size: 1.1rem; font-weight: 700; color: var(--accent-green); }

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

.leaderboard-table th {
    background: var(--section-alt);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
}

.quiz-progress { color: var(--text-muted); margin-bottom: 1rem; font-size: 0.9rem; text-align: center; }

.quiz-shell {
    max-width: 640px;
    margin: 0 auto;
    position: relative;
}

.quiz-app--finishing > :not(#quiz-finished):not(#quiz-fx-layer) {
    animation: quizContentExit 0.45s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes quizContentExit {
    to {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
        filter: blur(2px);
    }
}

/* ── Quiz finish FX (Disney-style staging) ── */
.quiz-fx-layer {
    display: none;
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 200;
}

.quiz-fx-layer--sad {
    background: radial-gradient(ellipse at center, rgba(100, 116, 139, 0.12) 0%, transparent 65%);
}

.quiz-fx-layer--celebrate {
    background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.18) 0%, transparent 60%);
}

.quiz-particle {
    position: absolute;
    top: -8vh;
    left: var(--start-x);
    font-size: var(--size);
    line-height: 1;
    opacity: 0;
    animation: quizParticleFall var(--duration) cubic-bezier(0.25, 0.46, 0.45, 0.94) var(--delay) forwards;
    will-change: transform, opacity;
}

.quiz-particle--sad {
    animation-name: quizSadFaceFloat;
}

.quiz-particle--celebrate {
    animation-name: quizCelebrateRise;
}

.quiz-particle--neutral {
    animation-name: quizParticleDrift;
}

@keyframes quizSadFaceFloat {
    0% {
        opacity: 0;
        transform: translateY(0) translateX(0) rotate(0deg) scale(0.3);
    }
    12% {
        opacity: 1;
        transform: translateY(8vh) translateX(calc(var(--drift) * 0.2)) rotate(calc(var(--spin) * 0.15)) scale(1.15);
    }
    100% {
        opacity: 0;
        transform: translateY(110vh) translateX(var(--drift)) rotate(var(--spin)) scale(0.85);
    }
}

@keyframes quizCelebrateRise {
    0% {
        opacity: 0;
        transform: translateY(20vh) scale(0.2) rotate(0deg);
    }
    15% {
        opacity: 1;
        transform: translateY(0) scale(1.25) rotate(calc(var(--spin) * 0.1));
    }
    100% {
        opacity: 0;
        transform: translateY(-30vh) translateX(var(--drift)) scale(0.6) rotate(var(--spin));
    }
}

@keyframes quizParticleDrift {
    0% { opacity: 0; transform: translateY(10vh) scale(0.5); }
    20% { opacity: 0.85; transform: translateY(0) scale(1); }
    100% { opacity: 0; transform: translateY(80vh) translateX(var(--drift)); }
}

@keyframes quizParticleFall {
    0% { opacity: 0; transform: translateY(-5vh) rotate(0deg); }
    10% { opacity: 1; }
    100% { opacity: 0; transform: translateY(105vh) rotate(var(--spin)); }
}

.quiz-confetti {
    position: absolute;
    top: 35vh;
    left: var(--start-x);
    width: 8px;
    height: 14px;
    background: var(--confetti-color);
    border-radius: 2px;
    opacity: 0;
    animation: quizConfettiBurst var(--duration) cubic-bezier(0.22, 1, 0.36, 1) var(--delay) forwards;
}

@keyframes quizConfettiBurst {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(0deg) scale(0);
    }
    8% {
        opacity: 1;
        transform: translate(0, -4vh) rotate(45deg) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(calc(var(--end-x) - var(--start-x)), 75vh) rotate(var(--spin)) scale(0.8);
    }
}

.quiz-finished {
    position: relative;
    z-index: 210;
    margin-top: 0;
    text-align: center;
    min-height: 320px;
}

.quiz-finished__panel {
    margin: 0 auto;
    max-width: 420px;
    padding: 2rem 1.5rem 1.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--card-bg);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: scale(0.72) translateY(24px);
    transition: none;
}

.quiz-finished__panel.is-visible {
    animation: quizPanelReveal 0.85s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes quizPanelReveal {
    0% {
        opacity: 0;
        transform: scale(0.72) translateY(24px);
    }
    55% {
        opacity: 1;
        transform: scale(1.06) translateY(-4px);
    }
    78% {
        transform: scale(0.98) translateY(2px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.quiz-finished__panel--sad {
    border-color: #cbd5e1;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}

.quiz-finished__panel--celebrate {
    border-color: #fcd34d;
    background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 45%, #fff 100%);
    box-shadow: 0 12px 40px rgba(245, 158, 11, 0.22);
}

.quiz-finished__panel--celebrate.is-visible {
    animation: quizPanelReveal 0.85s cubic-bezier(0.34, 1.56, 0.64, 1) forwards,
               quizCelebrateGlow 2s ease-in-out 0.4s infinite alternate;
}

@keyframes quizCelebrateGlow {
    from { box-shadow: 0 12px 40px rgba(245, 158, 11, 0.22); }
    to { box-shadow: 0 16px 48px rgba(245, 158, 11, 0.35); }
}

.quiz-finished__icon {
    font-size: 2.75rem;
    line-height: 1;
    margin-bottom: 0.5rem;
    animation: quizIconBounce 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.95s both;
}

@keyframes quizIconBounce {
    0% { transform: scale(0) rotate(-20deg); opacity: 0; }
    60% { transform: scale(1.2) rotate(8deg); opacity: 1; }
    100% { transform: scale(1) rotate(0deg); }
}

.quiz-finished__title {
    font-size: 1.75rem;
    margin: 0 0 0.75rem;
    opacity: 0;
    transform: translateY(12px);
}

.quiz-finished__title.is-visible {
    animation: quizLineReveal 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.quiz-finished__score-wrap {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 0.35rem;
}

.quiz-finished__score {
    font-size: 3rem;
    font-weight: 800;
    color: var(--coursera-blue);
    line-height: 1;
    display: inline-block;
    transform-origin: center bottom;
}

.quiz-finished__panel--celebrate .quiz-finished__score {
    color: #b45309;
}

.quiz-finished__panel--sad .quiz-finished__score {
    color: #64748b;
}

.quiz-finished__score--pop {
    animation: quizScorePop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes quizScorePop {
    0% { transform: scale(1); }
    40% { transform: scale(1.18, 0.92); }
    70% { transform: scale(0.94, 1.06); }
    100% { transform: scale(1); }
}

.quiz-finished__score-total {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-muted);
}

.quiz-finished__percent {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-muted);
    margin: 0 0 0.75rem;
    opacity: 0;
    transform: translateY(8px);
}

.quiz-finished__percent.is-visible {
    animation: quizLineReveal 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.quiz-finished__message {
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--text-muted);
    margin: 0 0 1.25rem;
    opacity: 0;
    transform: translateY(8px);
}

.quiz-finished__message.is-visible {
    animation: quizLineReveal 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes quizLineReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quiz-finished__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.quiz-finished__btn {
    opacity: 0;
    transform: translateY(10px) scale(0.92);
}

.quiz-finished__btn.is-visible {
    animation: quizBtnReveal 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.quiz-finished__btn:nth-child(2).is-visible {
    animation-delay: 0.08s;
}

@keyframes quizBtnReveal {
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .quiz-app--finishing > :not(#quiz-finished):not(#quiz-fx-layer) {
        animation: none;
        opacity: 0;
    }

    .quiz-finished__panel.is-visible,
    .quiz-finished__title.is-visible,
    .quiz-finished__percent.is-visible,
    .quiz-finished__message.is-visible,
    .quiz-finished__btn.is-visible,
    .quiz-finished__score--pop,
    .quiz-finished__icon {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

.quiz-actions {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
}

.quiz-footer-link {
    margin-top: 1.5rem;
    text-align: center;
}

.fc-timer,
.quiz-timer {
    text-align: center;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-muted);
    margin: 0 0 1rem;
}

.fc-timer.is-low,
.quiz-timer.is-low {
    color: var(--accent-red);
}

.btn-primary {
    background: var(--coursera-blue);
    color: #fff;
    border-color: var(--coursera-blue);
}

.btn-success {
    background: #16a34a;
    color: #fff;
    border-color: #16a34a;
}

.btn-muted {
    background: #64748b;
    color: #fff;
    border-color: #64748b;
}

.quiz-config-form {
    max-width: 360px;
}

.seed-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.seed-row input {
    flex: 1;
    max-width: none;
}

.form-hint {
    margin: 0.35rem 0 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.form-row--checkbox {
    margin-bottom: 1.25rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    cursor: pointer;
}

.checkbox-label input {
    width: auto;
    max-width: none;
    margin: 0;
}

.form-row { margin-bottom: 1rem; }

.form-row label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.form-row input,
.form-row select {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 280px;
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-primary);
}

.form-row input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    max-width: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
    accent-color: var(--coursera-blue);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500 !important;
}

/* ── Media Queries ── */
@media (max-width: 992px) {
    .role-grid { grid-template-columns: repeat(2, 1fr); }
    .intent-grid { grid-template-columns: repeat(2, 1fr); }
    .resource-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-media { order: -1; }

    .site-header__inner { flex-wrap: wrap; padding-top: 0.5rem; padding-bottom: 0.5rem; }

    .site-nav {
        order: 3;
        width: 100%;
        padding-bottom: 0.25rem;
    }

    .action-grid { grid-template-columns: 1fr; }
    .story-grid { grid-template-columns: 1fr; }
    .exam-facts { grid-template-columns: 1fr; }
}

@media (max-width: 576px) {
    .role-grid,
    .intent-grid,
    .resource-grid { grid-template-columns: 1fr; }

    .container { padding-left: 1rem; padding-right: 1rem; }
}