:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1e1e2d;
    --bg-tertiary: #2a2a3e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent-blue: #2196F3;
    --accent-orange: #FF9800;
    --accent-green: #26a65b;
    --accent-red: #e74c3c;
    --border-color: #2B2B43;
    --danger: #ef5350;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
}

/* App header */
.app-header {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

/* Pair search */
.pair-search {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.search-wrapper {
    position: relative;
    flex: 1;
    max-width: 360px;
}

.search-wrapper input {
    width: 100%;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    outline: none;
}

.search-wrapper input:focus {
    border-color: var(--accent-blue);
}

.search-dropdown {
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    max-height: 320px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    z-index: 200;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.search-item {
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: monospace;
    border-bottom: 1px solid var(--border-color);
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover {
    background: var(--bg-tertiary);
}

.search-item.active {
    color: var(--text-secondary);
    opacity: 0.5;
    pointer-events: none;
}

.loading-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Buttons */
.btn {
    border: none;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.15s, background 0.15s;
}

.btn:hover {
    opacity: 0.85;
}

.btn-add {
    background: var(--accent-blue);
    color: #fff;
}

.btn-remove {
    background: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    font-size: 1.2rem;
    line-height: 1;
}

.btn-remove:hover {
    color: var(--danger);
}

.btn-toggle {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.btn-toggle.active {
    background: var(--accent-blue);
    color: #fff;
}

/* Widgets grid */
.widgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 1rem;
    padding: 1rem 1.5rem;
}

@media (max-width: 560px) {
    .widgets-grid {
        grid-template-columns: 1fr;
        padding: 0.75rem;
    }
}

/* Drag and drop slots */
.widget-slot {
    transition: transform 0.15s ease, opacity 0.15s ease;
    border-radius: 8px;
    cursor: grab;
}

.widget-slot:active {
    cursor: grabbing;
}

.widget-slot.dragging {
    opacity: 0.4;
    transform: scale(0.97);
}

.widget-slot.drag-over {
    transform: scale(1.01);
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: 8px;
}

/* Pair widget */
.pair-widget {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.pair-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 0.75rem;
}

.pair-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
}

.pair-prices {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
    font-family: monospace;
    flex: 1;
    justify-content: center;
}

.price-binance {
    color: var(--accent-orange);
}

.price-gate {
    color: var(--accent-blue);
}

.pair-actions {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}

.chart-container {
    width: 100%;
    height: 300px;
}

/* Depth chart (order book) */
.depth-section {
    border-top: 1px solid var(--border-color);
}

.depth-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 1rem;
    font-size: 0.75rem;
}

.depth-title {
    color: var(--text-secondary);
}

.depth-label {
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bid-label { color: var(--accent-green); }
.ask-label { color: var(--accent-red); }

.depth-container {
    width: 100%;
    height: 180px;
    background: var(--bg-primary);
}

/* Status badge */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 0.35rem;
}

.status-dot.connected { background: #4caf50; }
.status-dot.disconnected { background: var(--danger); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

/* Loading */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
}

.loading-progress circle {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--accent-blue);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    text-align: center;
    font-weight: bold;
    color: var(--text-secondary);
    margin-top: 1rem;
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "Loading");
}

/* Error UI */
#blazor-error-ui {
    background: #2d1b1b;
    color: var(--danger);
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.4);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

#blazor-error-ui a {
    color: var(--accent-blue);
}

.blazor-error-boundary {
    background: var(--danger);
    padding: 1rem;
    color: white;
    border-radius: 6px;
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}