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

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --border: #475569;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav {
    display: none;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.btn-primary {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

/* Hero */
.hero {
    margin: 2rem 0;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Cards */
.card {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.card:hover {
    border-color: rgba(59, 130, 246, 0.5);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.card-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Market Overview */
.market-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.market-stat {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: border-color 0.2s;
}

.market-stat:hover {
    border-color: rgba(59, 130, 246, 0.5);
}

.market-stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.market-stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.market-stat-change {
    font-size: 0.875rem;
}

.change-positive {
    color: var(--success);
}

.change-negative {
    color: var(--danger);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 2rem 0;
}

/* Crypto Table */
.crypto-table {
    width: 100%;
    border-collapse: collapse;
}

.crypto-table thead {
    background: rgba(30, 41, 59, 0.3);
}

.crypto-table th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.crypto-table tbody tr {
    border-top: 1px solid var(--border);
    transition: background 0.2s;
    cursor: pointer;
}

.crypto-table tbody tr:hover {
    background: rgba(30, 41, 59, 0.3);
}

.crypto-table td {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
}

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

.crypto-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.75rem;
}

.crypto-info h3 {
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.crypto-info span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

/* News Feed */
.news-item {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    transition: background 0.2s;
    cursor: pointer;
}

.news-item:first-child {
    border-top: none;
}

.news-item:hover {
    background: rgba(30, 41, 59, 0.3);
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.news-category {
    padding: 0.25rem 0.5rem;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

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

.news-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
    transition: color 0.2s;
}

.news-item:hover .news-title {
    color: var(--accent-blue);
}

.news-source {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.news-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.news-footer button {
    color: var(--accent-blue);
    background: none;
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
}

.news-footer button:hover {
    color: var(--accent-purple);
}

/* Market Indices */
.market-indices {
    margin: 2rem 0;
}

.indices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.index-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.2s;
}

.index-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
}

.index-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.index-value {
    font-size: 1.875rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.index-status {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

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

/* Loading */
.loading {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (min-width: 768px) {
    .nav {
        display: flex;
    }

    .content-grid {
        grid-template-columns: 2fr 1fr;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
}

/* Utility Classes */
.format-currency {
    font-variant-numeric: tabular-nums;
}