:root {
    --bg-main: #0f111a;
    --bg-panel: rgba(25, 28, 41, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --success-green: #10b981;
    --danger-red: #ef4444;
    --call-bg: rgba(16, 185, 129, 0.05);
    --put-bg: rgba(239, 68, 68, 0.05);
    --atm-bg: rgba(59, 130, 246, 0.15);
}

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

body.dark-theme {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.1), transparent 25%);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 17, 26, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.badge {
    background: linear-gradient(135deg, var(--accent-blue), #8b5cf6);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-outline {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #2563eb;
}

/* Main Layout */
.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

/* Control Panel */
.control-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.selector-group {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

select {
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: 1px solid var(--border-color);
    padding: 0.5rem 2rem 0.5rem 1rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    appearance: none;
    outline: none;
    min-width: 150px;
}

/* Global Indices */
.global-indices {
    display: flex;
    gap: 1rem;
}

.index-ticker {
    display: flex;
    flex-direction: column;
    padding: 0.5rem 1rem;
    background: rgba(0,0,0,0.2);
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.05);
}

.index-ticker .name {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.index-ticker .vals {
    font-size: 0.875rem;
    font-weight: 600;
}

.text-green { color: var(--success-green); }
.text-red { color: var(--danger-red); }

/* Metrics Panel */
.metrics-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.metric-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

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

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.metric-subtitle {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.status-indicator {
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.dot.green { background: var(--success-green); box-shadow: 0 0 8px var(--success-green); }
.dot.red { background: var(--danger-red); box-shadow: 0 0 8px var(--danger-red); }

/* Option Chain Grid */
.grid-panel {
    padding: 0;
    overflow: hidden;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

th, td {
    padding: 0.75rem 1rem;
    white-space: nowrap;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

th {
    background: rgba(0,0,0,0.3);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    font-weight: 600;
}

.calls-header { color: var(--success-green); text-align: center; }
.puts-header { color: var(--danger-red); text-align: center; }
.strike-header { text-align: center; color: white; background: rgba(0,0,0,0.5); }

.strike-cell {
    text-align: center;
    font-weight: 700;
    background: rgba(0,0,0,0.3);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.atm-row {
    background: var(--atm-bg);
}

.ce-bg { background-color: var(--call-bg); }
.pe-bg { background-color: var(--put-bg); }

/* Animations for WebSocket Ticks */
@keyframes flashGreen {
    0% { background-color: rgba(16, 185, 129, 0.4); }
    100% { background-color: transparent; }
}

@keyframes flashRed {
    0% { background-color: rgba(239, 68, 68, 0.4); }
    100% { background-color: transparent; }
}

.tick-up { animation: flashGreen 1s ease-out; }
.tick-down { animation: flashRed 1s ease-out; }