/* Ultra Study Buddy -- Base styles */
:root {
    --accent: #14b8a6;
    --accent-light: #ccfbf1;
    --accent-dark: #0f766e;
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --bg: #fafffe;
    --bg-alt: #f0fdfa;
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --hover-bg: #f0fdfa;
    --text: #1a1a2e;
    --text-dim: #6b6b80;
    --text-muted: #9a9ab0;
    --border: #99f6e4;
    --border-subtle: #d1fae5;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark mode */
[data-theme="dark"] {
    --bg: #0f1419;
    --bg-alt: #161c22;
    --card-bg: #1c2530;
    --input-bg: #1c2530;
    --hover-bg: #1c2530;
    --text: #e8eaed;
    --text-dim: #9aa0a6;
    --text-muted: #6b7280;
    --border: #2d3a45;
    --border-subtle: #232d38;
    --accent: #2dd4bf;
    --accent-light: #1c2530;
    --accent-dark: #5eead4;
}

@media (prefers-color-scheme: dark) {
    [data-theme=""] {
        --bg: #0f1419;
        --bg-alt: #161c22;
        --card-bg: #1c2530;
        --input-bg: #1c2530;
        --hover-bg: #1c2530;
        --text: #e8eaed;
        --text-dim: #9aa0a6;
        --text-muted: #6b7280;
        --border: #2d3a45;
        --border-subtle: #232d38;
        --accent: #2dd4bf;
        --accent-light: #1c2530;
        --accent-dark: #5eead4;
    }
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-light); }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }
.container-md { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-dim { color: var(--text-dim); }
.text-muted { color: var(--text-muted); }
.bg-alt { background: var(--bg-alt); }

/* -- Nav -- */
.nav { border-bottom: 1px solid var(--border); padding: 0 1.5rem; position: sticky; top: 0; z-index: 100; backdrop-filter: blur(8px); background: rgba(255,255,255,0.85); }
[data-theme="dark"] .nav { background: rgba(15,20,25,0.85); }
@media (prefers-color-scheme: dark) { [data-theme=""] .nav { background: rgba(15,20,25,0.85); } }
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 52px; position: relative; }
.nav-brand { text-decoration: none; font-size: 1.125rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.nav-emblem { width: 28px; height: 28px; border-radius: 4px; }
.nav-brand-text { color: var(--text); }
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-link { text-decoration: none; color: var(--text-dim); font-size: 0.8125rem; font-weight: 500; padding: 0.375rem 0.625rem; border-radius: var(--radius-sm); transition: all 0.15s; }
.nav-link:hover { color: var(--text); background: var(--hover-bg); }
.nav-link-active { color: var(--accent); background: var(--accent-light); }

/* Hamburger -- hidden on desktop */
.nav-hamburger { display: none; width: 32px; height: 32px; border: none; background: transparent; cursor: pointer; align-items: center; justify-content: center; padding: 0; color: var(--text-dim); border-radius: 6px; transition: color 0.15s, background 0.15s; -webkit-tap-highlight-color: transparent; }
.nav-hamburger:hover { color: var(--text); background: var(--hover-bg); }
.nav-hamburger.open { color: var(--text); }

/* Mobile nav */
@media (max-width: 640px) {
    .nav-hamburger { display: flex; }
    .nav-links {
        display: none;
        position: absolute;
        top: 52px; left: -1.5rem; right: -1.5rem;
        background: var(--card-bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 0.5rem 0;
        z-index: 300;
        gap: 0;
    }
    [data-theme="dark"] .nav-links { background: var(--bg); }
    @media (prefers-color-scheme: dark) { [data-theme=""] .nav-links { background: var(--bg); } }
    .nav-links.mobile-open { display: flex; }
    .nav-links .nav-link {
        display: flex; align-items: center;
        border-radius: 0;
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
        min-height: 44px;
        box-sizing: border-box; width: 100%;
    }
    .nav-links .nav-link:hover { background: var(--hover-bg); }
    .nav-links .nav-link.nav-link-active { background: var(--accent-light); }
    .nav-links .btn { margin: 0.5rem 1.5rem; width: auto; }
    .nav-links .theme-toggle { margin: 0 1.5rem; width: auto; align-self: flex-start; }
}

/* -- Buttons -- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.5rem 1rem; border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 600; text-decoration: none; border: none; cursor: pointer; transition: all 0.15s; font-family: var(--font); line-height: 1.4; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-dim); }
.btn-outline:hover { background: var(--hover-bg); color: var(--text); }
.btn-block { width: 100%; }

/* -- Sections -- */
.section { padding: 4rem 1.5rem; }
.section-header { margin-bottom: 2.5rem; }
.section-header h2 { font-size: 1.75rem; font-weight: 700; }
.section-header p { margin-top: 0.5rem; }

/* -- Hero -- */
.hero { padding: 5rem 1.5rem; }
@media (min-width: 640px) { .hero { padding: 7rem 1.5rem; } }
.hero-title { font-size: 2.25rem; font-weight: 700; line-height: 1.2; margin-top: 1.5rem; }
@media (min-width: 640px) { .hero-title { font-size: 3rem; } }
.hero-subtitle { font-size: 1.125rem; color: var(--text-dim); max-width: 600px; margin: 1rem auto 0; line-height: 1.7; }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; margin-top: 2rem; }
@media (min-width: 640px) { .hero-cta { flex-direction: row; justify-content: center; } }
.hero-note { font-size: 0.875rem; color: var(--text-muted); margin-top: 1rem; }
.badge-pill { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.375rem 1rem; border-radius: 9999px; background: var(--accent-light); color: var(--accent-dark); font-size: 0.875rem; font-weight: 600; }

/* -- Features -- */
.features-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 640px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }
.feature-card { padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); }
.feature-card h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; }
.feature-card p { font-size: 0.875rem; color: var(--text-dim); }
.feature-icon { width: 40px; height: 40px; border-radius: var(--radius-sm); background: var(--accent-light); display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; color: var(--accent-dark); }

/* -- Domain Bars -- */
.domain-bars { display: flex; flex-direction: column; gap: 0.5rem; }
.domain-bar { display: flex; align-items: center; gap: 0.75rem; }
.domain-name { font-size: 0.875rem; color: var(--text-dim); width: 210px; flex-shrink: 0; }
@media (max-width: 639px) { .domain-name { width: 140px; font-size: 0.75rem; } }
.domain-track { flex: 1; background: var(--border-subtle); border-radius: 9999px; height: 20px; overflow: hidden; }
.domain-fill { height: 100%; border-radius: 9999px; background: linear-gradient(90deg, var(--accent-light), var(--accent)); display: flex; align-items: center; justify-content: flex-end; padding-right: 0.5rem; min-width: 2.5rem; }
.domain-pct { font-size: 0.75rem; font-weight: 600; color: #fff; }

/* -- Story -- */
.story-card { padding: 2rem; border-radius: var(--radius); border: 1px solid var(--accent-light); background: var(--card-bg); }
.story-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem; color: var(--accent); }
.story-header h2 { font-size: 1.5rem; font-weight: 700; color: var(--text); }
.story-quote { font-size: 1.125rem; color: var(--text-dim); line-height: 1.7; font-style: italic; }
.story-author { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-subtle); }
.story-author p { font-size: 0.875rem; color: var(--text-muted); }

/* -- Pricing -- */
.pricing-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; max-width: 600px; margin: 0 auto; }
@media (min-width: 640px) { .pricing-grid { grid-template-columns: repeat(2, 1fr); } }
.pricing-card { padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); }
.pricing-card h3 { font-size: 1.25rem; font-weight: 700; }
.pricing-amount { font-size: 2rem; font-weight: 700; margin-top: 0.5rem; }
.pricing-period { font-size: 0.875rem; color: var(--text-muted); margin-top: 0.25rem; }
.pricing-features { list-style: none; margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.pricing-features li { display: flex; align-items: flex-start; gap: 0.5rem; font-size: 0.875rem; }
.pricing-features li svg { flex-shrink: 0; margin-top: 2px; }
.pricing-card .btn { margin-top: 1.5rem; }
.pricing-card-featured { border: 2px solid var(--accent); position: relative; }
.pricing-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); padding: 0.25rem 0.75rem; background: var(--accent); color: #fff; font-size: 0.75rem; font-weight: 600; border-radius: 9999px; }

/* -- Facts Grid -- */
.facts-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2rem; }
@media (min-width: 640px) { .facts-grid { grid-template-columns: repeat(4, 1fr); } }
.fact-card { padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); }
.fact-number { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.fact-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }

/* -- Footer -- */
.footer { border-top: 1px solid var(--border); padding: 2rem 1.5rem; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
@media (min-width: 640px) { .footer-inner { flex-direction: row; justify-content: space-between; } }
.footer-brand { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: var(--text-muted); }
.footer-links { display: flex; align-items: center; gap: 1rem; }
.footer-links a { font-size: 0.875rem; color: var(--text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.footer-credit { font-size: 0.75rem; color: var(--text-muted); }

/* -- Auth Pages -- */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 52px); padding: 2rem 1.5rem; }
.auth-card { width: 100%; max-width: 400px; padding: 2rem; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); }
.auth-card h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
.auth-switch { text-align: center; font-size: 0.875rem; color: var(--text-dim); margin-top: 1.5rem; }
.auth-switch a { color: var(--accent); text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

/* -- Forms -- */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 500; margin-bottom: 0.375rem; }
.form-group input { width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--input-bg); color: var(--text); font-size: 0.875rem; font-family: var(--font); transition: border-color 0.15s; }
.form-group input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20,184,166,0.15); }
.form-group input::placeholder { color: var(--text-muted); }

/* -- Alerts -- */
.alert { padding: 0.75rem 1rem; border-radius: var(--radius-sm); font-size: 0.875rem; margin-bottom: 1rem; }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid var(--danger); }

/* -- Dashboard -- */
.dashboard { max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem; }
.dashboard-header { margin-bottom: 1.5rem; }
.dashboard-header h1 { font-size: 1.75rem; font-weight: 700; }
.dashboard-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; margin-top: 1.5rem; }
@media (min-width: 640px) { .dashboard-grid { grid-template-columns: repeat(2, 1fr); } }
.dashboard-card { padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); text-decoration: none; color: var(--text); transition: all 0.15s; display: block; }
.dashboard-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.dashboard-card h3 { font-size: 1.125rem; font-weight: 600; margin-top: 0.75rem; }
.dashboard-card p { font-size: 0.875rem; color: var(--text-dim); margin-top: 0.25rem; }
.dashboard-card-icon { width: 48px; height: 48px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; }
.icon-quiz { background: var(--accent-light); color: var(--accent-dark); }
.icon-flashcards { background: #f5f3ff; color: #8b5cf6; }
[data-theme="dark"] .icon-flashcards { background: #1c1c2e; }
@media (prefers-color-scheme: dark) { [data-theme=""] .icon-flashcards { background: #1c1c2e; } }
.icon-docs { background: #fef3c7; color: #d97706; }
[data-theme="dark"] .icon-docs { background: #2e2810; }
@media (prefers-color-scheme: dark) { [data-theme=""] .icon-docs { background: #2e2810; } }
.icon-search { background: #eff6ff; color: #3b82f6; }
[data-theme="dark"] .icon-search { background: #0f1c30; }
@media (prefers-color-scheme: dark) { [data-theme=""] .icon-search { background: #0f1c30; } }

.plan-badge { display: inline-block; padding: 0.25rem 0.75rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; }
.plan-badge-free { background: var(--border-subtle); color: var(--text-dim); }
.plan-badge-paid { background: var(--accent-light); color: var(--accent-dark); }

.upgrade-banner { margin-top: 2rem; padding: 1.5rem; border-radius: var(--radius); background: linear-gradient(135deg, var(--accent-light), var(--bg-alt)); border: 1px solid var(--accent); text-align: center; }
.upgrade-banner h3 { font-size: 1.125rem; font-weight: 700; }
.upgrade-banner p { font-size: 0.875rem; color: var(--text-dim); margin: 0.5rem 0 1rem; }

/* -- Theme Toggle -- */
.theme-toggle { appearance: none; -webkit-appearance: none; background: none; border: 1px solid var(--border); width: 32px; height: 32px; border-radius: var(--radius-sm); cursor: pointer; font-size: 1rem; display: flex; align-items: center; justify-content: center; transition: all 0.15s; color: var(--text-dim); }
.theme-toggle:hover { background: var(--hover-bg); border-color: var(--accent); }

/* -- Flashcards -- */
.flashcard-container { perspective: 1000px; }
.flashcard { transition: transform 0.5s; transform-style: preserve-3d; position: relative; min-height: 240px; }
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back { backface-visibility: hidden; padding: 2rem; border-radius: var(--radius); min-height: 240px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.flashcard-front { border: 2px solid var(--border); background: var(--card-bg); }
.flashcard-back { transform: rotateY(180deg); position: absolute; inset: 0; border: 2px solid var(--accent); background: var(--hover-bg); }

.fc-topic-card { display: block; padding: 0.75rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); transition: all 0.15s; }
.fc-topic-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }

/* -- Dashboard Sections -- */
.dashboard-section { margin-top: 2rem; }
.dashboard-section h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.recent-attempts { display: flex; flex-direction: column; gap: 0.5rem; }
.attempt-row { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); }
.attempt-info { display: flex; flex-direction: column; gap: 0.125rem; }
.attempt-topic { font-size: 0.875rem; font-weight: 500; }
.attempt-date { font-size: 0.75rem; }
.attempt-score { font-size: 0.875rem; font-weight: 600; }
.score-pass { color: var(--success); }
.score-fail { color: var(--warning); }
.weak-topics { display: flex; flex-direction: column; gap: 0.5rem; }
.weak-topic-card { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); text-decoration: none; color: var(--text); transition: all 0.15s; }
.weak-topic-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.weak-topic-name { font-size: 0.875rem; font-weight: 500; flex: 1; }
.weak-topic-score { font-size: 0.875rem; font-weight: 600; }

/* -- Docs -- */
.docs-page { max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem; }
.docs-header { margin-bottom: 1.5rem; }
.docs-header h1 { font-size: 1.75rem; font-weight: 700; }

.breadcrumbs { display: flex; align-items: center; gap: 0.25rem; font-size: 0.8125rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.breadcrumbs a { color: var(--accent); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumb-sep { color: var(--text-muted); }
.breadcrumb-current { color: var(--text-dim); font-weight: 500; }

.docs-list { display: flex; flex-direction: column; gap: 0.5rem; }
.docs-list-item { display: flex; align-items: center; gap: 1rem; padding: 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); text-decoration: none; color: var(--text); transition: all 0.15s; }
.docs-list-item:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.docs-list-icon { width: 40px; height: 40px; border-radius: var(--radius-sm); background: var(--accent-light); color: var(--accent-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.docs-list-content { flex: 1; min-width: 0; }
.docs-list-content h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.125rem; }
.docs-list-content p { font-size: 0.8125rem; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.docs-list-arrow { color: var(--text-muted); flex-shrink: 0; }

/* Doc content rendered from markdown */
.doc-content { line-height: 1.75; }
.doc-content h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 1rem; }
.doc-content h2 { font-size: 1.375rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.75rem; padding-bottom: 0.375rem; border-bottom: 1px solid var(--border-subtle); }
.doc-content h3 { font-size: 1.125rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; }
.doc-content p { margin-bottom: 1rem; }
.doc-content ul, .doc-content ol { margin-bottom: 1rem; padding-left: 1.5rem; }
.doc-content li { margin-bottom: 0.25rem; }
.doc-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; font-size: 0.875rem; }
.doc-content th, .doc-content td { padding: 0.5rem 0.75rem; border: 1px solid var(--border); text-align: left; }
.doc-content th { background: var(--bg-alt); font-weight: 600; }
.doc-content code { background: var(--bg-alt); padding: 0.125rem 0.375rem; border-radius: 4px; font-size: 0.875em; }
.doc-content pre { background: var(--bg-alt); padding: 1rem; border-radius: var(--radius-sm); overflow-x: auto; margin-bottom: 1rem; }
.doc-content pre code { background: none; padding: 0; }
.doc-content strong { font-weight: 700; }
.doc-content blockquote { border-left: 3px solid var(--accent); padding-left: 1rem; color: var(--text-dim); margin-bottom: 1rem; }

/* -- Search -- */
.search-page { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }
.search-header { margin-bottom: 1.5rem; }
.search-header h1 { font-size: 1.75rem; font-weight: 700; }
.search-input-wrap { position: relative; margin-bottom: 1.5rem; }
.search-icon { position: absolute; left: 0.875rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
.search-input { width: 100%; padding: 0.75rem 0.75rem 0.75rem 2.75rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--input-bg); color: var(--text); font-size: 1rem; font-family: var(--font); transition: border-color 0.15s; }
.search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20,184,166,0.15); }
.search-input::placeholder { color: var(--text-muted); }
.search-spinner { position: absolute; right: 0.875rem; top: 50%; transform: translateY(-50%); }
.spinner { width: 18px; height: 18px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.htmx-indicator { opacity: 0; transition: opacity 0.2s; }
.htmx-request .htmx-indicator, .htmx-indicator.htmx-request { opacity: 1; }

.search-empty { text-align: center; padding: 2rem; color: var(--text-muted); }
.search-count { font-size: 0.8125rem; margin-bottom: 0.75rem; }
.search-results-list { display: flex; flex-direction: column; }
.search-result-item { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem; border-bottom: 1px solid var(--border-subtle); text-decoration: none; color: var(--text); transition: background 0.15s; }
.search-result-item:first-child { border-top: 1px solid var(--border-subtle); }
.search-result-item:hover { background: var(--hover-bg); }
.search-result-content { flex: 1; min-width: 0; }
.search-result-content h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.125rem; }
.search-result-path { font-size: 0.75rem; margin-bottom: 0.25rem; }
.search-result-excerpt { font-size: 0.8125rem; color: var(--text-dim); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.search-result-arrow { color: var(--text-muted); flex-shrink: 0; margin-top: 0.25rem; }

/* -- Quiz -- */
.quiz-page { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }
.quiz-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; }
.quiz-header h1 { font-size: 1.5rem; font-weight: 700; }
.quiz-free-note { display: block; margin-top: 0.25rem; font-size: 0.8125rem; color: var(--warning); }
.quiz-free-note a { color: var(--accent); }
.quiz-mode-toggle { display: flex; gap: 0.25rem; margin-top: 1rem; background: var(--hover-bg); border-radius: var(--radius-sm); padding: 0.1875rem; width: fit-content; }
.quiz-mode-btn { padding: 0.375rem 0.875rem; font-size: 0.8125rem; font-weight: 500; border-radius: calc(var(--radius-sm) - 2px); text-decoration: none; color: var(--text-dim); transition: all 0.15s; }
.quiz-mode-btn:hover { color: var(--text); }
.quiz-mode-active { background: var(--card-bg); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,0.08); }
.quiz-topic-section { margin-top: 1.5rem; }
.quiz-topic-label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.75rem; }
.quiz-topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
@media (min-width: 640px) { .quiz-topic-grid { grid-template-columns: repeat(3, 1fr); } }
.quiz-topic-card { display: block; padding: 0.75rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); text-decoration: none; color: var(--text); transition: all 0.15s; }
.quiz-topic-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.quiz-topic-name { font-size: 0.875rem; font-weight: 500; display: block; }
.quiz-topic-count { font-size: 0.75rem; display: block; }
.quiz-topic-best { font-size: 0.75rem; color: var(--success); margin-top: 0.125rem; display: block; }

.quiz-badge { display: inline-block; font-size: 0.75rem; font-weight: 500; padding: 0.25rem 0.625rem; border-radius: 9999px; background: var(--accent-light); color: var(--accent-dark); }

/* Quiz play */
.quiz-play-page { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }
.quiz-progress-row { display: flex; justify-content: space-between; font-size: 0.8125rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.quiz-progress-bar { width: 100%; background: var(--border-subtle); border-radius: 9999px; height: 6px; overflow: hidden; margin-bottom: 1rem; }
.quiz-progress-fill { height: 100%; border-radius: 9999px; background: linear-gradient(90deg, var(--accent-light), var(--accent)); transition: width 0.3s; }
.quiz-question-card { padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); margin: 1rem 0; }
.quiz-question-text { font-size: 1.125rem; font-weight: 500; line-height: 1.6; }
.quiz-options { display: flex; flex-direction: column; gap: 0.5rem; }
.quiz-option-btn { width: 100%; display: flex; align-items: center; gap: 0.75rem; padding: 0.875rem 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); color: var(--text); cursor: pointer; text-align: left; font-size: 0.9375rem; font-family: var(--font); transition: all 0.15s; }
.quiz-option-btn:hover:not(:disabled) { border-color: var(--accent); background: var(--hover-bg); }
.quiz-option-btn:disabled { cursor: default; }
.quiz-option-letter { width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 0.8125rem; font-weight: 600; flex-shrink: 0; }
.quiz-option-text { flex: 1; }
.quiz-option-correct { border-color: var(--success); background: var(--success-light); color: var(--success); }
.quiz-option-correct .quiz-option-letter { border-color: var(--success); }
.quiz-option-wrong { border-color: var(--danger); background: var(--danger-light); color: var(--danger); }
.quiz-option-wrong .quiz-option-letter { border-color: var(--danger); }
.quiz-option-dimmed { border-color: var(--border-subtle); color: var(--text-muted); }

.quiz-explanation { padding: 1rem; border-radius: var(--radius-sm); border: 1px solid var(--accent-light); background: var(--hover-bg); margin-top: 1rem; }
.quiz-explanation-label { font-size: 0.8125rem; font-weight: 600; color: var(--accent-dark); margin-bottom: 0.25rem; }
.quiz-explanation p { font-size: 0.875rem; color: var(--text-dim); }

/* Quiz results */
.quiz-results-page { max-width: 600px; margin: 0 auto; padding: 2rem 1.5rem; text-align: center; }
.quiz-results-icon { margin-bottom: 1rem; }
.quiz-results-page h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; }
.quiz-results-stats { display: flex; justify-content: center; gap: 2rem; margin: 1.5rem 0; padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); }
.quiz-stat { text-align: center; }
.quiz-stat-value { font-size: 1.5rem; font-weight: 700; }
.quiz-stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.125rem; }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.quiz-results-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }

/* Quiz review */
.quiz-review-page { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }
.quiz-review-header { margin-bottom: 1.5rem; }
.quiz-review-header h1 { font-size: 1.375rem; font-weight: 700; }
.quiz-review-list { display: flex; flex-direction: column; gap: 1.5rem; }
.quiz-review-card { padding: 1.25rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); }
.quiz-review-question { font-size: 1rem; font-weight: 500; margin-bottom: 0.75rem; line-height: 1.6; }
.quiz-review-options { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 0.75rem; }
.quiz-review-option { display: flex; align-items: center; gap: 0.625rem; padding: 0.5rem 0.75rem; border-radius: var(--radius-sm); font-size: 0.875rem; border: 1px solid var(--border-subtle); }
.quiz-review-option-correct { border-color: var(--success); background: var(--success-light); }
.quiz-review-explanation { padding: 0.75rem; border-radius: var(--radius-sm); background: var(--hover-bg); border: 1px solid var(--accent-light); }
.quiz-review-explanation p { font-size: 0.8125rem; color: var(--text-dim); }

/* -- Mobile responsive fixes -- */
@media (max-width: 480px) {
    /* Dashboard cards stack */
    .dashboard-grid { grid-template-columns: 1fr; }
    /* Quiz topic grid single column on very small */
    .quiz-topic-grid { grid-template-columns: 1fr; }
    /* Quiz results stats wrap */
    .quiz-results-stats { flex-direction: column; gap: 0.75rem; }
    .quiz-results-actions { flex-direction: column; align-items: stretch; }
    .quiz-results-actions .btn { width: 100%; justify-content: center; }
    /* Flashcard actions stack */
    .flashcard-actions-wrap { flex-direction: column; gap: 0.5rem; }
    /* Doc table horizontal scroll */
    .doc-content table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    /* Pricing single column */
    .pricing-grid { grid-template-columns: 1fr; }
    /* Facts grid 2 cols */
    .facts-grid { grid-template-columns: repeat(2, 1fr); }
    /* Hero smaller */
    .hero { padding: 3rem 1rem; }
    .hero-title { font-size: 1.75rem; }
    .hero-subtitle { font-size: 1rem; }
    /* Section padding */
    .section { padding: 2.5rem 1rem; }
    .container, .container-sm, .container-md { padding: 0 1rem; }
    /* Domain bars label */
    .domain-name { width: 110px; font-size: 0.6875rem; }
}

/* Ensure flashcard study page works on mobile */
@media (max-width: 640px) {
    /* Footer responsive */
    .footer-inner { text-align: center; }
    .footer-links { flex-wrap: wrap; justify-content: center; }
}