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

:root {
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-card: #242b3d;
    --text-primary: #ffffff;
    --text-secondary: #8b95a5;
    --accent-green: #00c853;
    --accent-red: #ff5252;
    --accent-blue: #2196f3;
    --border-color: #2d3748;
}

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

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 28px;
    font-weight: 600;
}

.header-info {
    display: flex;
    gap: 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

.market-status {
    padding: 4px 12px;
    border-radius: 20px;
    background-color: var(--bg-secondary);
}

.market-status.open {
    background-color: rgba(0, 200, 83, 0.2);
    color: var(--accent-green);
}

.market-status.closed {
    background-color: rgba(255, 82, 82, 0.2);
    color: var(--accent-red);
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background-color: #1976d2;
}

.btn-primary:disabled {
    background-color: #555;
    cursor: not-allowed;
}

.auto-refresh {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.auto-refresh label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.auto-refresh input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.auto-refresh select {
    padding: 8px 12px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
}

.stock-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stock-card {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

.stock-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.stock-card.positive {
    border-left: 4px solid var(--accent-green);
}

.stock-card.negative {
    border-left: 4px solid var(--accent-red);
}

.stock-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.stock-symbol {
    font-size: 24px;
    font-weight: 700;
}

.stock-name {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.stock-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.stock-price {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 8px;
}

.stock-change {
    display: flex;
    gap: 12px;
    font-size: 16px;
    font-weight: 500;
}

.stock-change.positive {
    color: var(--accent-green);
}

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

.stock-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-size: 14px;
    font-weight: 500;
}

.chart-section {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.chart-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.time-range-buttons {
    display: flex;
    gap: 4px;
    background-color: var(--bg-card);
    padding: 4px;
    border-radius: 8px;
}

.time-btn {
    padding: 8px 14px;
    border: none;
    border-radius: 6px;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}

.time-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.1);
}

.time-btn.active {
    background-color: var(--accent-blue);
    color: white;
}

.time-btn.loading {
    opacity: 0.5;
    cursor: not-allowed;
}

.chart-container {
    height: 300px;
    position: relative;
}

.summary-section {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
}

.summary-section h2 {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.summary-card {
    background-color: var(--bg-card);
    border-radius: 8px;
    padding: 16px;
}

.summary-title {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.summary-value {
    font-size: 24px;
    font-weight: 600;
}

.summary-value.positive {
    color: var(--accent-green);
}

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

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-secondary);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 12px;
}

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

.error-message {
    background-color: rgba(255, 82, 82, 0.1);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.stock-card.updating {
    opacity: 0.7;
}

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

.updating .stock-price {
    animation: pulse 1s infinite;
}

@media (max-width: 768px) {
    .dashboard {
        padding: 12px;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .controls {
        flex-direction: column;
        gap: 12px;
    }

    .stock-grid {
        grid-template-columns: 1fr;
    }

    .chart-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .time-range-buttons {
        width: 100%;
        justify-content: space-between;
        overflow-x: auto;
    }

    .time-btn {
        padding: 6px 10px;
        font-size: 12px;
        flex-shrink: 0;
    }
}