:root {
    --color-bg: #0a0a0b;
    --color-bg-alt: #111113;
    --color-bg-card: #18181b;
    --color-border: #27272a;
    --color-border-light: #3f3f46;
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #f59e0b;
    --color-accent-hover: #fbbf24;
    --color-success: #22c55e;
    --color-error: #ef4444;
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-centered {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--color-accent);
    color: #000;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    color: var(--color-text);
    background: var(--color-bg-card);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border-light);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-large {
    padding: 14px 32px;
    font-size: 1rem;
}

.user-menu {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9rem;
}

.dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    min-width: 160px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
}

.user-menu:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--color-text-secondary);
    transition: all 0.15s;
}

.dropdown a:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(245, 158, 11, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(245, 158, 11, 0.08), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 800px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-bottom: 32px;
}

.hero-divider {
    width: 60px;
    height: 2px;
    background: var(--color-accent);
    margin: 0 auto 32px;
}

.hero-manifesto {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    color: var(--color-accent);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.filter-bar-centered {
    justify-content: center;
}

.filter-tabs {
    display: flex;
    gap: 8px;
}

.filter-tab {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-tab:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.filter-tab.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #000;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    width: 280px;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 0.9rem;
    outline: none;
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

.search-box svg {
    color: var(--color-text-muted);
}

.papers-grid {
    display: grid;
    gap: 20px;
}

.paper-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s;
    cursor: pointer;
}

.paper-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.paper-status {
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
}

.paper-status.submitted {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-accent);
}

.paper-status.published {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-success);
}

.paper-status.draft {
    background: rgba(113, 113, 122, 0.15);
    color: var(--color-text-muted);
}

.paper-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.paper-abstract {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.paper-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.paper-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.paper-author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
}

.paper-tags {
    display: flex;
    gap: 8px;
}

.paper-tag {
    padding: 2px 8px;
    background: var(--color-bg-alt);
    border-radius: 4px;
    font-size: 0.75rem;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.page-btn:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.page-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #000;
}

.cfp-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 700px;
    margin: 0 auto;
}

.cfp-badge {
    position: absolute;
    top: -12px;
    left: 32px;
    padding: 4px 12px;
    background: var(--color-accent);
    color: #000;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.cfp-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.cfp-desc {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.cfp-meta {
    margin-bottom: 24px;
}

.cfp-deadline {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.proposals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.proposal-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s;
}

.proposal-card:hover {
    border-color: var(--color-border-light);
}

.proposal-status {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.proposal-status.active {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-success);
}

.proposal-status.pending {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-accent);
}

.proposal-status.ended {
    background: rgba(113, 113, 122, 0.15);
    color: var(--color-text-muted);
}

.proposal-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.proposal-votes {
    display: flex;
    gap: 20px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.vote-count {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.vote-count.for {
    color: var(--color-success);
}

.vote-count.against {
    color: var(--color-error);
}

.governance-action {
    text-align: center;
    margin-top: 40px;
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 24px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.auth-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.auth-subtitle {
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-error {
    color: var(--color-error);
    font-size: 0.85rem;
    margin-top: 8px;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.auth-divider span {
    padding: 0 16px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--color-accent);
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.submit-page {
    padding-top: 100px;
    padding-bottom: 60px;
}

.submit-container {
    max-width: 700px;
    margin: 0 auto;
}

.submit-header {
    margin-bottom: 40px;
}

.submit-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.submit-desc {
    color: var(--color-text-secondary);
}

.form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: var(--font-sans);
    resize: vertical;
    min-height: 120px;
    transition: border-color 0.2s;
}

.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.paper-detail-page {
    padding-top: 100px;
    padding-bottom: 60px;
}

.paper-detail-container {
    max-width: 800px;
    margin: 0 auto;
}

.paper-detail-header {
    margin-bottom: 40px;
}

.paper-detail-status {
    margin-bottom: 16px;
}

.paper-detail-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

.paper-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    color: var(--color-text-secondary);
}

.paper-detail-section {
    margin-bottom: 40px;
}

.paper-detail-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.paper-detail-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    opacity: 0.5;
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 100px 16px 60px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        width: 100%;
    }
    
    .proposals-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}
