:root {
    --bg-color: #1a1a1a;
    --surface-color: #2c2c2c;
    --primary-color: #0d6efd;
    --text-color: #f8f9fa;
    --text-secondary-color: #adb5bd;
    --positive-color: #20c997;
    --negative-color: #fd7e14;
    --border-color: #495057;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1800px;
    margin: auto;
    background: var(--surface-color);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.container.wide {
    max-width: none;
    width: 95vw;
    margin-left: 0;
    margin-right: auto;
}

.perps-controls {
    margin-bottom: 12px;
}

.perps-controls .control-group label {
    margin-right: 6px;
}

h1, h2 {
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    font-size: 2.5em;
    border: none;
}

.chart-container {
    margin-top: 40px;
    padding: 20px;
    background: var(--surface-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

#aggregateChartContainer {
    height: 350px;
}

.marquee-selected {
    outline: 2px solid #0d6efd;
    background-color: rgba(13, 110, 253, 0.3);
}

/* Perps Grid */
.perps-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
    /* Smooth transitions for grid reordering */
    transition: grid-template-columns 0.2s ease;
    /* Enable smooth card positioning during reorder */
    position: relative;
}

/* Staggered animation for cards appearing */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chart-card.fade-in {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.chart-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px;
    position: relative;
    cursor: pointer;
    /* Smooth transitions for card movements and hover effects */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.2s ease;
    will-change: transform, opacity;
    opacity: 1;
    /* Optimize for GPU acceleration */
    transform: translateZ(0);
    backface-visibility: hidden;
}

.chart-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(13, 110, 253, 0.1);
    border-color: var(--primary-color);
    z-index: 10;
}

.chart-card:active {
    transform: translateY(-2px) scale(1.01);
    transition-duration: 0.1s;
}

.chart-card.watchlist-selected {
    border-color: #0d6efd;
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.chart-card-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    color: var(--text-secondary-color);
    margin-bottom: 6px;
}

.chart-card-header .symbol {
    font-weight: 600;
    color: var(--text-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.exchange-tag {
    background: rgba(77, 171, 247, 0.12);
    color: #4dabf7;
    font-size: 0.7em;
    padding: 2px 6px;
    border-radius: 6px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.chart-card-header .pct {
    font-size: 0.9em;
}

.pct-up { color: #20c997; }
.pct-down { color: #fd7e14; }

.chart-canvas-wrap {
    position: relative;
    height: 140px;
}

.chart-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary-color);
    font-size: 0.85em;
    z-index: 1;
    /* Pulse animation for loading state */
    animation: pulse 1.5s ease-in-out infinite;
}

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

.chart-error {
    color: var(--negative-color);
    font-weight: 600;
}

.pct-error {
    color: var(--negative-color) !important;
}

/* Chart Modal */
.chart-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.chart-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
}

.chart-modal-content {
    position: relative;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
}

.chart-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
}

.modal-watchlist-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-watchlist-controls select {
    min-width: 180px;
}

.modal-watchlist-controls button:hover {
    background: #0b5ed7 !important;
    border-color: #0b5ed7 !important;
}

.modal-watchlist-controls button:active {
    transform: scale(0.98);
}

.chart-modal-header h2 {
    margin: 0;
    font-size: 1.5em;
    color: var(--text-color);
    border: none;
    padding: 0;
}

.chart-modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary-color);
    font-size: 2em;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.chart-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

.chart-modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.chart-modal-metric {
    text-align: center;
    font-size: 0.9em;
    color: #888;
    margin-bottom: 12px;
    min-height: 20px;
}

.chart-modal-canvas-wrap {
    position: relative;
    height: 500px;
    width: 100%;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.experimental-panel label input[type="checkbox"] {
    accent-color: #0d6efd;
}

/* Crazy Scale mode */
.crazy-scale .perps-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 6px;
}
.crazy-scale .chart-card {
    padding: 6px;
}
.crazy-scale .chart-card-header {
    margin-bottom: 4px;
}
.crazy-scale .chart-canvas-wrap {
    height: 100px;
}
.crazy-scale .pct { font-size: 0.8em; }

@media (max-width: 1600px) {
    .perps-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 1200px) {
    .perps-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 992px) {
    .perps-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .perps-grid { grid-template-columns: repeat(2, 1fr); }
    .container {
        padding: 10px;
        margin: 0;
    }
    h1 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }
    .chart-container {
        margin-top: 20px;
    }
    .chart-container h2 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    .perps-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .perps-controls .control-group {
        width: 100%;
    }
    .perps-controls .control-group select,
    .perps-controls .control-group input {
        width: 100%;
    }
    .perps-controls label[for="crazyScaleToggle"] {
        width: 100%;
    }
    #searchInput {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    .perps-grid { grid-template-columns: 1fr; }
    .perps-controls {
        gap: 8px;
    }
    .perps-controls button {
        font-size: 0.85em;
        padding: 4px 6px;
    }
    .chart-canvas-wrap {
        height: 120px;
    }
}

/* Custom Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #1a1a1a;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
    border: 1px solid #1a1a1a;
}

::-webkit-scrollbar-thumb:hover {
    background: #444;
}

::-webkit-scrollbar-corner {
    background: #1a1a1a;
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: #333 #1a1a1a;
}

.drag-rect {
    position: fixed;
    pointer-events: none;
    border: 1px dashed #0d6efd;
    background: rgba(13, 110, 253, 0.15);
    z-index: 9999;
}

body.drag-selecting {
    user-select: none;
    cursor: crosshair;
}