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

:root {
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --bg-card: #111111;
    --bg-card-hover: #161616;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #555555;
    --accent: #c9a227;
    --accent-light: #e0b830;
    --accent-glow: rgba(201, 162, 39, 0.2);
    --red: #dc2626;
    --red-glow: rgba(220, 38, 38, 0.2);
    --green: #16a34a;
    --border: #1a1a1a;
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --radius: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.1em;
}

.logo-star {
    color: var(--accent);
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.btn-nav {
    padding: 10px 20px !important;
    background: var(--accent) !important;
    color: var(--bg-dark) !important;
    border-radius: 4px;
    font-weight: 600 !important;
}

.btn-nav:hover {
    background: var(--accent-light) !important;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 30%, var(--accent-glow) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 70%, var(--red-glow) 0%, transparent 50%);
    z-index: 0;
}

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

.hero-tagline {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 32px;
}

.highlight {
    color: var(--accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
    animation: scroll-pulse 2s infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    letter-spacing: 0.02em;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(201, 162, 39, 0.1);
}

/* Sections */
section {
    padding: 120px 0;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

section h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 24px;
}

.section-intro {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 60px;
}

/* Diagnosis Section */
.diagnosis {
    background: var(--bg-darker);
}

.diagnosis-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.diagnosis-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
}

.diagnosis-year {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--red);
    letter-spacing: 0.1em;
}

.diagnosis-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.diagnosis-subtitle {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 16px;
}

.diagnosis-card p:last-child {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.diagnosis-result {
    display: flex;
    align-items: stretch;
    gap: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
}

.result-before, .result-after {
    flex: 1;
}

.result-before h4 {
    color: var(--green);
    margin-bottom: 16px;
}

.result-after h4 {
    color: var(--red);
    margin-bottom: 16px;
}

.diagnosis-result ul {
    list-style: none;
}

.diagnosis-result li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border);
}

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

.result-arrow {
    display: flex;
    align-items: center;
    font-size: 2rem;
    color: var(--text-muted);
}

/* Stats Bar */
.stats-bar {
    background: var(--accent);
    padding: 40px 0;
}

.stats-bar .container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 24px;
}

.stats-bar .stat {
    text-align: center;
}

.stats-bar .stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--bg-dark);
}

.stats-bar .stat-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--bg-dark);
    opacity: 0.8;
    letter-spacing: 0.05em;
}

/* Solution Section */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.3s;
}

.solution-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.solution-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.solution-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.solution-compare {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
}

.solution-compare .old {
    color: var(--text-muted);
    text-decoration: line-through;
}

.solution-compare .new {
    color: var(--accent);
    font-weight: 500;
}

/* Union Section */
.union {
    background: var(--bg-darker);
}

.union-map {
    margin-bottom: 48px;
}

.map-placeholder {
    height: 300px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-dark) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.map-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y="50" x="50" text-anchor="middle" font-size="60" fill="%231a1a1a">&#127757;</text></svg>') center/contain no-repeat;
    opacity: 0.3;
}

.continent-text {
    position: relative;
    z-index: 1;
    text-align: center;
}

.continent-name {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.continent-motto {
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.1em;
}

.union-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.union-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    transition: all 0.3s;
}

.union-card:hover {
    border-color: var(--accent);
}

.union-card.featured {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(201, 162, 39, 0.1) 100%);
}

.union-flag {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.union-card h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.union-pop {
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 12px;
}

.union-card > p:not(.union-pop) {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.union-reps {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.union-total {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    margin-bottom: 48px;
}

.total-item {
    text-align: center;
}

.total-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

.total-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.union-border {
    text-align: center;
    padding: 32px;
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid var(--red);
    border-radius: var(--radius);
}

.union-border h4 {
    color: var(--red);
    margin-bottom: 12px;
}

.union-border p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Papers Section */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.paper-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-decoration: none;
    transition: all 0.3s;
}

.paper-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.paper-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.paper-card h3 {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.paper-card p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.papers-download {
    text-align: center;
}

/* Quote Section */
.quote-section {
    background: var(--bg-card);
    text-align: center;
    padding: 80px 24px;
}

.quote-section blockquote {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-style: italic;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.quote-section cite {
    font-size: 0.9rem;
    color: var(--accent);
}

/* Join Section */
.join {
    background: var(--bg-darker);
    text-align: center;
}

.join h2 {
    text-align: center;
}

.join .section-intro {
    margin-left: auto;
    margin-right: auto;
}

.join-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.join-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
}

.join-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.join-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.email-form {
    display: flex;
    gap: 12px;
}

.email-form input {
    flex: 1;
    padding: 14px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
}

.email-form input:focus {
    outline: none;
    border-color: var(--accent);
}

.share-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.share-btn {
    padding: 12px 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.share-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

/* Founder Section */
.founder {
    padding: 80px 0;
}

.founder-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px;
}

.founder-text h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: 4px;
}

.founder-title {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.founder-text > p:last-child {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 500px;
}

.founder-signature {
    text-align: right;
}

.signature-text {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-style: italic;
    margin-bottom: 8px;
}

.signature-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    font-weight: 700;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.footer-brand p {
    width: 100%;
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-quotes {
    text-align: right;
}

.footer-quotes p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 8px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
    .diagnosis-grid {
        grid-template-columns: 1fr;
    }

    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .union-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .papers-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    section {
        padding: 80px 0;
    }

    .solution-grid,
    .join-grid {
        grid-template-columns: 1fr;
    }

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

    .union-total {
        flex-wrap: wrap;
        gap: 32px;
    }

    .papers-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .diagnosis-result {
        flex-direction: column;
    }

    .result-arrow {
        transform: rotate(90deg);
        justify-content: center;
    }

    .founder-content {
        flex-direction: column;
        text-align: center;
    }

    .founder-signature {
        text-align: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-quotes {
        text-align: center;
    }

    .email-form {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .papers-grid {
        grid-template-columns: 1fr;
    }

    .stats-bar .stat-number {
        font-size: 1.75rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

/* Modal Styles */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    overflow-y: auto;
    padding: 40px 20px;
}

.modal-overlay.active {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 800px;
    width: 100%;
    margin: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
    z-index: 10;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    padding: 40px 40px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-number {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 8px;
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
}

.modal-content {
    padding: 40px;
    max-height: 60vh;
    overflow-y: auto;
    line-height: 1.8;
    color: var(--text-secondary);
}

.modal-content h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin: 32px 0 16px;
}

.modal-content h3:first-child {
    margin-top: 0;
}

.modal-content p {
    margin-bottom: 16px;
}

.modal-content strong {
    color: var(--text-primary);
}

.modal-content ul, .modal-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.modal-content li {
    margin-bottom: 8px;
}

.modal-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.modal-content th, .modal-content td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.modal-content th {
    color: var(--accent);
    font-weight: 600;
}

.modal-nav {
    display: flex;
    justify-content: space-between;
    padding: 20px 40px;
    border-top: 1px solid var(--border);
}

.modal-nav-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.modal-nav-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.modal-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Paper card cursor */
.paper-card {
    cursor: pointer;
}

@media (max-width: 768px) {
    .modal-header, .modal-content, .modal-nav {
        padding: 24px;
    }
    
    .modal-title {
        font-size: 1.5rem;
    }
    
    .modal-content {
        max-height: 50vh;
    }
}