/* ============================================
   Auto-Trading Platform - Dark Theme
   ============================================ */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2333;
    --bg-hover: #21293a;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #00c853;
    --accent-red: #ff1744;
    --accent-yellow: #ffd54f;
    --accent-orange: #ff9800;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans TC', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.5rem;
    color: var(--accent-blue);
    white-space: nowrap;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    white-space: nowrap;
}

nav {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.2s;
}

nav a:hover { background: var(--bg-hover); color: var(--text-primary); }
nav a.active { background: var(--accent-blue); color: #fff; }

.status-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
}

.dot.live {
    background: var(--accent-green);
    box-shadow: 0 0 6px var(--accent-green);
    animation: pulse 2s infinite;
}

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

/* Main */
main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Controls */
.controls {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.control-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

select {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
}

.tf-buttons, .exchange-toggles {
    display: flex;
    gap: 4px;
}

.tf-buttons button, .ex-btn {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tf-buttons button:hover, .ex-btn:hover { background: var(--bg-hover); }
.tf-buttons button.active { background: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }
.ex-btn.active { background: #1a3a5c; color: var(--accent-blue); border-color: var(--accent-blue); }

/* Price Cards */
.price-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.price-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
}

.ex-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px; height: 28px;
    border-radius: 6px;
    background: #f0b90b;
    color: #000;
    font-weight: bold;
    font-size: 0.8rem;
}

.ex-logo.max { background: #2b6cb0; color: #fff; }
.ex-logo.okx { background: #fff; color: #000; }

.card-price {
    font-size: 1.8rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    margin-bottom: 0.3rem;
}

.card-change {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-change.positive { color: var(--accent-green); }
.card-change.negative { color: var(--accent-red); }

.card-detail {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.card-volume {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.spread-card {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, var(--bg-card), #2a1f00);
}

/* Chart */
.chart-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
}

.chart-section h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.chart-container {
    position: relative;
    height: 400px;
}

/* Analysis Section */
.analysis-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.analysis-section h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.tf-tag {
    background: var(--accent-blue);
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Trend Signal */
.trend-signal {
    text-align: center;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    border-radius: 10px;
    background: var(--bg-card);
}

.trend-label {
    font-size: 1.8rem;
    font-weight: 700;
}

/* Indicator Grid */
.indicator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.indicator-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.ind-title {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.ind-value {
    font-size: 1.3rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.ind-sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.rsi-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.rsi-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* Collapsible */
.collapsible { margin-bottom: 1rem; }

.collapse-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.7rem 1rem;
    border-radius: 8px;
    width: 100%;
    text-align: left;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s;
}

.collapse-btn:hover { background: var(--bg-hover); }

.collapse-content {
    display: none;
    padding: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 8px 8px;
}

.collapse-content.open { display: block; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.6rem 1rem;
    text-align: right;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

th {
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

th:first-child, td:first-child { text-align: left; }

/* Overview Table */
.overview-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.overview-section h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

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

.overview-table tbody tr {
    cursor: pointer;
    transition: background 0.2s;
}

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

.trend-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #000;
}

/* Screener */
.screener-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover { background: var(--bg-hover); }
.tab-btn.active[data-tab="bullish"] { background: #0a3d1a; color: var(--accent-green); border-color: var(--accent-green); }
.tab-btn.active[data-tab="bearish"] { background: #3d0a0a; color: var(--accent-red); border-color: var(--accent-red); }

.screener-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.screener-grid.hidden { display: none; }

.screener-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.screener-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.card-rank {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.card-symbol {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.card-symbol .quote {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.card-price-sm {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.card-trend {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #000;
    margin-bottom: 0.5rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

/* Back to top */
#backToTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: none;
    z-index: 50;
    transition: all 0.2s;
}

#backToTop:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88,166,255,0.4);
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    nav { margin-left: 0; }
    .controls { flex-direction: column; }
    .price-cards { grid-template-columns: 1fr 1fr; }
    .chart-container { height: 300px; }
    .indicator-grid { grid-template-columns: 1fr 1fr; }
    .screener-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .price-cards { grid-template-columns: 1fr; }
    .indicator-grid { grid-template-columns: 1fr; }
    .screener-grid { grid-template-columns: 1fr; }
}