/* ============================================
   Hexagonal Hermes - Apple Dark Theme CSS
   ============================================ */

/* CSS Variables */
:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --bg-card-expanded: #161616;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-tertiary: #6e6e73;
    --accent-blue: #2997ff;
    --accent-purple: #a855f7;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --card-radius: 16px;
    --nav-height: 60px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 20px;
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-height) + 80px) 40px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 80%;
    background: radial-gradient(ellipse at center top, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.08) 40%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 980px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: #a5b4fc;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(40px, 7vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #fff 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(20px, 2.5vw, 24px);
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 400;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-tertiary);
    margin-bottom: 50px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ============================================
   Categories Navigation
   ============================================ */
.categories-nav {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 12px;
    padding: 0 0 40px 0;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.categories-nav::-webkit-scrollbar {
    display: none;
}

.category-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    min-width: 110px;
}

.category-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.category-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: 10px;
    opacity: 0.9;
}

.category-icon svg {
    width: 20px;
    height: 20px;
    stroke: white;
}

.category-name {
    font-size: 12px;
    font-weight: 500;
    text-align: center;
    line-height: 1.3;
    color: var(--text-secondary);
}

.category-btn:hover .category-name {
    color: var(--text-primary);
}

/* ============================================
   Cases Container & Sections
   ============================================ */
.cases-container {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.category-section {
    scroll-margin-top: calc(var(--nav-height) + 20px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.category-badge {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    border: 1px solid;
}

.category-badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-badge-icon svg {
    width: 28px;
    height: 28px;
}

.category-title-group {
    flex: 1;
}

.category-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.category-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* ============================================
   Case Card
   ============================================ */
.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: var(--transition);
}

.case-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.case-card.expanded {
    background: var(--bg-card-expanded);
}

.case-card-header {
    padding: 24px;
    cursor: pointer;
    user-select: none;
}

.case-card-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.case-card-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.case-confidence {
    flex-shrink: 0;
    padding: 4px 10px;
    border-radius: 980px;
    font-size: 11px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
}

.case-confidence.high {
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
}

.case-confidence.medium-high {
    background: rgba(251, 191, 36, 0.12);
    color: #fbbf24;
}

.case-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.case-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.case-card-category {
    font-size: 12px;
    color: var(--text-tertiary);
    background: rgba(255, 255, 255, 0.04);
    padding: 4px 10px;
    border-radius: 6px;
}

.case-card-expand {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--accent-blue);
    font-weight: 500;
}

.case-card-expand svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.case-card-expand.expanded svg {
    transform: rotate(180deg);
}

/* ============================================
   Case Card Detail (Expanded Content)
   ============================================ */
.case-card-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, background 0.3s ease;
}

.case-card-detail.open {
    max-height: 2000px;
    border-top: 1px solid var(--border-color);
}

.case-detail-content {
    padding: 0;
}

.detail-body {
    padding: 28px;
}

.detail-class-type {
    display: inline-block;
    font-size: 12px;
    color: var(--text-tertiary);
    background: rgba(255, 255, 255, 0.04);
    padding: 6px 12px;
    border-radius: 8px;
    margin-bottom: 20px;
}

/* ============================================
   Markdown Rendering
   ============================================ */
.detail-markdown {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.detail-markdown h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 24px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.detail-markdown h2:first-child {
    margin-top: 0;
}

.detail-markdown h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 12px;
}

.detail-markdown h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 16px 0 8px;
}

.detail-markdown p {
    margin-bottom: 14px;
}

.detail-markdown ul, .detail-markdown ol {
    margin: 12px 0;
    padding-left: 20px;
}

.detail-markdown li {
    margin-bottom: 6px;
}

.detail-markdown strong {
    color: var(--text-primary);
    font-weight: 600;
}

.detail-markdown a {
    color: var(--accent-blue);
    text-decoration: none;
}

.detail-markdown a:hover {
    text-decoration: underline;
}

.detail-markdown code {
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 13px;
    color: #a5b4fc;
}

.detail-markdown pre {
    background: #0a0a0a;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    margin: 16px 0;
    overflow-x: auto;
}

.detail-markdown pre code {
    background: none;
    padding: 0;
    font-size: 13px;
    line-height: 1.6;
    color: #e5e5e5;
}

.detail-markdown table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 13px;
}

.detail-markdown td, .detail-markdown th {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.detail-markdown tr:first-child td {
    background: rgba(255, 255, 255, 0.04);
    font-weight: 600;
    color: var(--text-primary);
}

.detail-markdown hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 24px 0;
}

/* ============================================
   Detail Actions
   ============================================ */
.detail-actions {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.detail-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.detail-btn svg {
    width: 18px;
    height: 18px;
}

.detail-btn.primary {
    background: var(--accent-gradient);
    color: white;
}

.detail-btn.primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* ============================================
   Detail Page (Full Page View)
   ============================================ */
.detail-page {
    min-height: 100vh;
    padding-top: var(--nav-height);
}

.detail-page-header {
    position: sticky;
    top: var(--nav-height);
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    padding: 16px 40px;
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-blue);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
}

.back-btn:hover {
    background: rgba(41, 151, 255, 0.1);
}

.back-btn svg {
    width: 18px;
    height: 18px;
}

.detail-page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 40px 100px;
}

.detail-page-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.detail-page-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 40px;
}

.detail-confidence {
    padding: 6px 14px;
    border-radius: 980px;
    font-size: 12px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
}

.detail-confidence.high {
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
}

.detail-class {
    font-size: 14px;
    color: var(--text-tertiary);
}

.detail-page-body {
    margin-bottom: 40px;
}

.detail-page-footer {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.detail-page .detail-markdown {
    font-size: 16px;
}

.detail-page .detail-markdown h2 {
    font-size: 24px;
}

.detail-page .detail-markdown h3 {
    font-size: 18px;
}

.detail-page .detail-markdown pre {
    padding: 20px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 60px 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content p {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
}

.footer-links a {
    color: var(--accent-blue);
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 0.8;
}

.footer-links span {
    color: var(--text-tertiary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .categories-nav {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 900px) {
    .categories-nav {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    :root {
        --nav-height: 52px;
    }

    .nav-content {
        padding: 0 20px;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: calc(var(--nav-height) + 60px) 20px 60px;
        min-height: 60vh;
    }

    .hero-stats {
        gap: 40px;
    }

    .stat-number {
        font-size: 40px;
    }

    .main-content {
        padding: 40px 20px 80px;
    }

    .categories-nav {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .category-btn {
        padding: 16px 10px;
        min-width: auto;
    }

    .category-icon {
        width: 32px;
        height: 32px;
    }

    .category-icon svg {
        width: 18px;
        height: 18px;
    }

    .category-name {
        font-size: 11px;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .category-title {
        font-size: 24px;
    }

    .cases-container {
        gap: 60px;
    }

    .case-card-header {
        padding: 20px;
    }

    .detail-body {
        padding: 20px;
    }

    .detail-page-content {
        padding: 40px 20px 80px;
    }

    .footer {
        padding: 40px 20px;
    }
}

@media (max-width: 480px) {
    .categories-nav {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 36px;
    }
}