:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --blue: #58a6ff;
}

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

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

.container-fluid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-meta {
    color: var(--text-secondary);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    display: inline-block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 12px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--text-primary);
    border-bottom-color: var(--blue);
}

/* Filters */
.filters {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.filter-btn:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}

.search-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    width: 200px;
    margin-left: auto;
}

.search-box::placeholder {
    color: var(--text-secondary);
}

.search-box:focus {
    outline: none;
    border-color: var(--blue);
}

/* Compare input */
.compare-section {
    padding: 16px 0;
    display: flex;
    gap: 10px;
    align-items: center;
}

.compare-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 14px;
    width: 200px;
}

.compare-input:focus {
    outline: none;
    border-color: var(--blue);
}

.compare-btn {
    background: var(--blue);
    border: none;
    color: #fff;
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
}

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

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
}

.data-table thead {
    position: sticky;
    top: 60px;
    z-index: 10;
}

.data-table th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 12px;
    text-align: right;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.data-table th:first-child {
    text-align: left;
}

.data-table th:nth-child(2) {
    text-align: left;
}

.data-table th:hover {
    color: var(--text-primary);
}

.data-table th .sort-arrow {
    margin-left: 4px;
    opacity: 0.5;
}

.data-table th.sorted .sort-arrow {
    opacity: 1;
    color: var(--blue);
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data-table td:first-child {
    text-align: left;
    color: var(--text-secondary);
    font-size: 12px;
}

.data-table td:nth-child(2) {
    text-align: left;
    font-weight: 600;
}

.data-table tbody tr {
    transition: background 0.15s;
}

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

/* Colors */
.positive {
    color: var(--green);
}

.negative {
    color: var(--red);
}

.neutral {
    color: var(--text-secondary);
}

/* Exchange badges */
.exchange-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-binance {
    background: rgba(243, 186, 47, 0.15);
    color: #f3ba2f;
}

.badge-okx {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.badge-bybit {
    background: rgba(246, 160, 39, 0.15);
    color: #f6a027;
}

.badge-bitget {
    background: rgba(0, 240, 168, 0.15);
    color: #00f0a8;
}

/* Loading */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Error */
.error-bar {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.3);
    color: var(--red);
    padding: 8px 16px;
    border-radius: 6px;
    margin: 8px 0;
    font-size: 13px;
}

/* Tab content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .data-table {
        font-size: 12px;
    }
    .data-table th,
    .data-table td {
        padding: 8px 6px;
    }
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    .search-box {
        width: 100%;
        margin-left: 0;
    }
}