:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(18, 18, 26, 0.7);
    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --accent-blue: #3b82f6;
    --accent-purple: #a855f7;
    --accent-teal: #14b8a6;
    --accent-orange: #f97316;
    --glass-blur: 12px;
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background Orbs */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    z-index: 0;
    pointer-events: none;
    animation: orb-drift 20s ease-in-out infinite;
}

.bg-orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent-blue), transparent 70%);
    top: -200px; left: -200px;
    animation-delay: 0s;
}

.bg-orb-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, var(--accent-purple), transparent 70%);
    top: 40%; right: -150px;
    animation-delay: -7s;
    animation-duration: 25s;
}

.bg-orb-3 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, var(--accent-teal), transparent 70%);
    bottom: -100px; left: 30%;
    animation-delay: -14s;
    animation-duration: 28s;
}

@keyframes orb-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-emoji { font-size: 2rem; }
.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    min-width: 300px;
}

.search-box input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.search-box::before {
    content: "🔍";
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.5;
}

.last-sync {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Main */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: 2.5rem;
    padding: 3rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
}

.hero h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.stat-item span:not(.stat-number) {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.7rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* Card */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--category-color, var(--accent-blue));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.card:hover::before {
    opacity: 1;
}

.card-category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 50px;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.card-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.card-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50px;
    color: var(--text-muted);
}

.card-updated {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* Loading */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 200;
    padding: 2rem;
    overflow-y: auto;
}

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

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    max-width: 90vw;
    width: 800px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    animation: modal-in 0.3s ease;
}

@keyframes modal-in {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 10;
}

.modal-category-badge {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    white-space: nowrap;
}

.modal h2 {
    flex: 1;
    font-size: 1.5rem;
    line-height: 1.4;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.modal-content {
    padding: 1.5rem;
    line-height: 1.8;
}

.modal-content h1, .modal-content h2, .modal-content h3 {
    margin: 1.5rem 0 1rem;
    color: var(--text-primary);
}

.modal-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.modal-content code {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.modal-content pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

.modal-content pre code {
    background: none;
    padding: 0;
}

.modal-content ul, .modal-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.modal-content li {
    margin: 0.5rem 0;
}

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

.modal-content a:hover {
    text-decoration: underline;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.2);
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-tags .card-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
}

.modal-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1200px) {
    .cards-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

@media (max-width: 768px) {
    .header-content { flex-direction: column; gap: 1rem; }
    .search-box { min-width: 100%; }
    .hero h2 { font-size: 1.8rem; }
    .stats-bar { gap: 1rem; }
    .filter-bar { justify-content: flex-start; overflow-x: auto; padding-bottom: 0.5rem; }
    .cards-grid { grid-template-columns: 1fr; }
    .modal { margin: 1rem; }
}

/* Graph View */
.graph-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.graph-header {
    padding: 1rem 2rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.graph-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.graph-stats {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.btn-close {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-close:hover {
    background: var(--border);
}

#graphCanvas {
    height: calc(100vh - 200px);
    min-height: 500px;
    flex: 1;
    width: 100%;
    background: var(--bg-primary);
}

.graph-legend {
    padding: 1rem 2rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    display: flex;
    gap: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.graph-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.graph-toggle:hover {
    background: var(--border);
    border-color: var(--accent);
}

.graph-toggle svg {
    stroke: var(--accent);
}