:root {
    --bg-dark: #0f1419;
    --bg-card: #1a1f2e;
    --bg-hover: #242b3d;
    --accent-green: #00d4aa;
    --accent-red: #ff4757;
    --accent-blue: #3b82f6;
    --text-primary: #ffffff;
    --text-secondary: #8b95a5;
    --border-color: #2d3548;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1a1f2e 0%, #0f1419 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-stats {
    display: flex;
    gap: 2rem;
}

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

.header-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.header-stat-value {
    font-size: 1.25rem;
    font-weight: 600;
}

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

/* Tabs */
.tabs {
    display: flex;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    overflow-x: auto;
}

.tab {
    padding: 1rem 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    white-space: nowrap;
}

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

.tab.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}

.tab-badge {
    background: var(--accent-green);
    color: var(--bg-dark);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-size: 0.65rem;
    margin-left: 0.5rem;
    font-weight: 600;
}

/* Main Content */
.main {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Overview Cards */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.card-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.card-value {
    font-size: 2rem;
    font-weight: 700;
}

.card-change {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* Chart Container */
.chart-container {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.chart-svg {
    width: 100%;
    height: 200px;
    background: linear-gradient(180deg, rgba(0,212,170,0.05) 0%, transparent 100%);
    border-radius: 8px;
}

/* Tables */
.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.table-container {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow-x: auto;
    margin-bottom: 2rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
}

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

tr:hover td {
    background: var(--bg-hover);
}

.symbol {
    font-weight: 600;
    color: var(--accent-blue);
}

.side-long {
    color: var(--accent-green);
    font-weight: 600;
}

.side-short {
    color: var(--accent-red);
    font-weight: 600;
}

/* Strategies Grid */
.strategies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.strategy-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
    display: block;
}

.strategy-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.strategy-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.strategy-name {
    font-size: 1.1rem;
    font-weight: 600;
}

.strategy-broker {
    font-size: 0.75rem;
    background: var(--bg-hover);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--text-secondary);
}

.strategy-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

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

.strategy-stat-value {
    font-size: 1.1rem;
    font-weight: 600;
}

.strategy-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.sparkline {
    height: 40px;
    margin-top: 1rem;
    background: linear-gradient(180deg, rgba(0,212,170,0.15) 0%, transparent 100%);
    border-radius: 4px;
}

/* Logout Button */
.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--bg-hover);
    text-decoration: none;
    font-size: 1.2rem;
    transition: background 0.2s;
}

.logout-btn:hover {
    background: var(--accent-red);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
    }
    .header-stats {
        width: 100%;
        justify-content: space-between;
    }
    .tabs {
        padding: 0 1rem;
    }
    .tab {
        padding: 0.75rem 1rem;
    }
    .main {
        padding: 1rem;
    }
}