:root {
    --bg-base: #0d1117;
    --bg-surface: rgba(22, 27, 34, 0.7);
    --bg-surface-hover: rgba(33, 38, 45, 0.9);
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border-color: rgba(48, 54, 61, 0.5);
    
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-red: #f85149;
    --accent-amber: #d29922;

    --nav-height: 60px;
    --header-height: 56px;
    
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    padding-bottom: env(safe-area-inset-bottom, 20px);
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
}

.logo {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, #58a6ff, #94c2f5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    font-size: 0.8rem;
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
}
.status-dot.active { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.status-dot.error { background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); }

/* Main Content */
.main-content {
    padding: calc(var(--header-height) + 16px) 16px calc(var(--nav-height) + 32px);
    max-width: 800px;
    margin: 0 auto;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}
.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.kpi-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
}

.kpi-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.kpi-value {
    font-size: 1.25rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 4px;
}
.kpi-value.positive { color: var(--accent-green); }
.kpi-value.negative { color: var(--accent-red); }

.kpi-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
}

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

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

/* Badges & Chips */
.badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(88, 166, 255, 0.2);
    color: var(--accent-blue);
}
.badge-green { background: rgba(63, 185, 80, 0.2); color: var(--accent-green); }

.symbol-chips {
    padding: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    font-family: 'JetBrains Mono', monospace;
}
.chip.loading { animation: pulse 1.5s infinite; }

/* Select */
.select-sm {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    outline: none;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th, .data-table td {
    padding: 12px 16px;
    text-align: left;
    white-space: nowrap;
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0,0,0,0.2);
}

.data-table td {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.empty-row {
    text-align: center !important;
    color: var(--text-secondary);
    padding: 32px !important;
}

/* Settings Group */
.settings-group {
    padding: 8px 16px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.setting-row:last-child { border-bottom: none; }

.setting-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.setting-value {
    font-size: 0.9rem;
    font-weight: 500;
}
.setting-value.mono {
    font-family: 'JetBrains Mono', monospace;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 100%;
    height: 100%;
    cursor: pointer;
    transition: color 0.2s;
}

.nav-btn svg {
    width: 20px;
    height: 20px;
}

.nav-btn span {
    font-size: 0.65rem;
    font-weight: 500;
}

.nav-btn.active {
    color: var(--accent-blue);
}

/* Utilities */
.color-green { color: var(--accent-green); }
.color-red { color: var(--accent-red); }
.color-amber { color: var(--accent-amber); }

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

/* Desktop overrides */
@media (min-width: 768px) {
    .kpi-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}