:root {
    --black: #1a1a1a;
    --black-light: #2d2d2d;
    --gray-dark: #4a4a4a;
    --gray: #6b6b6b;
    --gray-light: #9a9a9a;
    --gray-lighter: #e5e5e5;
    --gray-bg: #f5f5f5;
    --white: #ffffff;
    --white-soft: #fafafa;
    --border-color: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --sidebar-width: 260px;
    --header-height: 60px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    background-color: var(--gray-bg);
    color: var(--black);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--black);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--gray);
}

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

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--black);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    fill: var(--white);
}

.logo-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    line-height: 1.3;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--gray-light);
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--gray-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--gray-dark);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--gray-bg);
    color: var(--black);
}

.nav-item.active {
    background: var(--black);
    color: var(--white);
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--gray-lighter);
    color: var(--gray-dark);
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--gray-bg);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-dark);
}

.sidebar-footer a:hover {
    background: var(--black);
    color: var(--white);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-header {
    position: sticky;
    top: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 50;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--black);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 280px;
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--gray-bg);
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--black);
    background: var(--white);
}

.search-box svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--gray-light);
}

.content-body {
    padding: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--black-light);
    color: var(--white);
}

.btn-secondary {
    background: var(--white);
    color: var(--black);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--black);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-dark);
}

.btn-ghost:hover {
    background: var(--gray-bg);
    color: var(--black);
}

.btn svg {
    width: 16px;
    height: 16px;
}

.card {
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--black);
}

.card-body {
    padding: 24px;
}

.event-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.event-card {
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
}

.event-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.event-card-image {
    width: 100%;
    height: 180px;
    background: var(--gray-lighter);
    object-fit: cover;
}

.event-card-body {
    padding: 20px;
}

.event-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
    line-height: 1.4;
}

.event-card-title a:hover {
    color: var(--gray-dark);
}

.event-card-summary {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.event-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.event-card-date {
    font-size: 12px;
    color: var(--gray-light);
}

.event-card-tags {
    display: flex;
    gap: 6px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--gray-bg);
    color: var(--gray-dark);
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
}

.tag:hover {
    background: var(--black);
    color: var(--white);
}

.tag-highlight {
    background: var(--black);
    color: var(--white);
}

.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-node {
    position: relative;
    padding-bottom: 32px;
}

.timeline-node:last-child {
    padding-bottom: 0;
}

.timeline-node::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 12px;
    height: 12px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 50%;
    z-index: 1;
}

.timeline-node.highlight::before {
    border-color: var(--black);
    background: var(--black);
}

.timeline-node.highlight::after {
    content: '';
    position: absolute;
    left: -32px;
    top: 2px;
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.timeline-date {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-light);
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
}

.timeline-content {
    font-size: 14px;
    color: var(--gray-dark);
    line-height: 1.7;
}

.timeline-evidence {
    margin-top: 12px;
    padding: 12px 16px;
    background: var(--gray-bg);
    border-radius: 8px;
    font-size: 13px;
}

.timeline-evidence a {
    color: var(--gray-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-evidence a:hover {
    color: var(--black);
}

.related-events {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.related-card {
    display: flex;
    gap: 16px;
    padding: 16px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: var(--transition);
}

.related-card:hover {
    border-color: var(--black);
    box-shadow: var(--shadow-sm);
}

.related-card-image {
    width: 80px;
    height: 80px;
    background: var(--gray-lighter);
    border-radius: 8px;
    flex-shrink: 0;
    object-fit: cover;
}

.related-card-content {
    flex: 1;
    min-width: 0;
}

.related-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card-meta {
    font-size: 12px;
    color: var(--gray-light);
}

.sources-list {
    list-style: none;
}

.source-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.source-item:last-child {
    border-bottom: none;
}

.source-icon {
    width: 32px;
    height: 32px;
    background: var(--gray-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.source-icon svg {
    width: 16px;
    height: 16px;
    color: var(--gray);
}

.source-info {
    flex: 1;
    min-width: 0;
}

.source-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--black);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-url {
    font-size: 12px;
    color: var(--gray-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--black);
    margin-bottom: 8px;
}

.form-label .required {
    color: #e53935;
    margin-left: 4px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--black);
    background: var(--white);
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--black);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    font-size: 12px;
    color: var(--gray-light);
    margin-top: 6px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-verified {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-pending {
    background: #fff3e0;
    color: #ef6c00;
}

.status-draft {
    background: var(--gray-lighter);
    color: var(--gray-dark);
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.pagination-item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-dark);
    background: var(--white);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.pagination-item:hover {
    border-color: var(--black);
    color: var(--black);
}

.pagination-item.active {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gray-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-icon svg {
    width: 40px;
    height: 40px;
    color: var(--gray-light);
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
}

.empty-state-desc {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 24px;
}

.footer {
    padding: 24px 32px;
    border-top: 1px solid var(--border-color);
    background: var(--white);
    text-align: center;
}

.footer-text {
    font-size: 13px;
    color: var(--gray-light);
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 12px;
}

.footer-links a {
    font-size: 13px;
    color: var(--gray);
}

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

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
}

@media (max-width: 768px) {
    .content-body {
        padding: 20px;
    }
    
    .event-grid {
        grid-template-columns: 1fr;
    }
    
    .search-box input {
        width: 200px;
    }
    
    .content-header {
        padding: 12px 20px;
    }
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
}

.mobile-menu-btn svg {
    width: 20px;
    height: 20px;
    color: var(--black);
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.overlay.show {
    display: block;
}

.event-detail-header {
    padding: 32px;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
}

.event-detail-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 12px;
    line-height: 1.3;
}

.event-detail-summary {
    font-size: 16px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.event-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.event-detail-section {
    padding: 32px;
    background: var(--white);
    margin-top: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.participants-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.participant-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--gray-bg);
    border-radius: 8px;
}

.participant-avatar {
    width: 32px;
    height: 32px;
    background: var(--gray-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray);
}

.participant-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--black);
}

.participant-role {
    font-size: 12px;
    color: var(--gray-light);
}

.verify-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #e8f5e9;
    color: #2e7d32;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
}

.verify-badge svg {
    width: 14px;
    height: 14px;
}

.admin-nav-item {
    position: relative;
}

.admin-nav-item .submenu {
    display: none;
    padding-left: 44px;
    margin-top: 4px;
}

.admin-nav-item.open .submenu {
    display: block;
}

.admin-nav-item .submenu a {
    display: block;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--gray);
    border-radius: 6px;
}

.admin-nav-item .submenu a:hover,
.admin-nav-item .submenu a.active {
    background: var(--gray-bg);
    color: var(--black);
}

.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--gray-bg);
}

.data-table td {
    font-size: 14px;
    color: var(--black);
}

.data-table tbody tr:hover {
    background: var(--gray-bg);
}

.action-btns {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: var(--gray-bg);
    color: var(--gray-dark);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--black);
    color: var(--white);
}

.action-btn.danger:hover {
    background: #e53935;
}

.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
}

.alert-error {
    background: #ffebee;
    color: #c62828;
}

.alert-warning {
    background: #fff3e0;
    color: #ef6c00;
}

.alert svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}