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

:root {
    --bg-primary: #050505;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #0f0f0f;
    --border-color: #1a1a1a;
    --border-active: #2a2a2a;
    --text-primary: #999999;
    --text-secondary: #aaaaaa;
    --text-dim: #333;
    --accent: #444;
    --accent-glow: #666;
    --sidebar-width: 200px;
}

body {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    min-height: 100vh;
    display: flex;
}

/* Loading */
#loading {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--bg-primary);
    z-index: 1000;
    gap: 20px;
}

#loading.hidden {
    display: none;
}

.loader {
    width: 2px;
    height: 40px;
    background: var(--text-dim);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.2; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

#status {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    padding: 20px 16px;
    gap: 20px;
    overflow-y: auto;
    flex: 1;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 9px;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.stream-buttons {
    display: flex;
    gap: 4px;
}

.stream-count {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    width: 36px;
    height: 28px;
    cursor: pointer;
    font-family: inherit;
    font-size: 11px;
    transition: all 0.2s ease;
}

.stream-count:hover {
    color: var(--text-primary);
    border-color: var(--border-active);
}

.stream-count.active {
    background: var(--text-dim);
    color: var(--bg-primary);
    border-color: var(--text-dim);
}

/* Volume slider */
.volume-group {
    width: 100%;
}

#volume-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

#volume-slider::-webkit-slider-thumb:hover {
    background: var(--text-primary);
}

#volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--text-secondary);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

#guidance-btn,
#refresh {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: 9px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.2s ease;
    width: 100%;
}

#guidance-btn:hover,
#refresh:hover {
    color: var(--text-primary);
    border-color: var(--border-active);
}

#guidance-btn:disabled,
#refresh:disabled {
    opacity: 0.5;
    cursor: wait;
}

#refresh svg {
    opacity: 0.5;
    width: 12px;
    height: 12px;
}

#info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 9px;
    letter-spacing: 1px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

#detected-count {
    color: var(--text-secondary);
}

#saved-count {
    color: var(--text-dim);
    font-size: 8px;
}

.detection-active #detected-count {
    color: var(--text-primary);
}

/* Main Content Area */
#main {
    flex: 1;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-primary);
    overflow: hidden;
}

#main.has-fullscreen {
    padding: 0;
}

/* Grid - sized to fit viewport with 4:3 cells */
.grid {
    display: grid;
    gap: 2px;
    background: var(--bg-primary);
}

/* 1 stream: single 4:3 cell */
.grid[data-count="1"] {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    /* Fit one 4:3 cell */
    width: min(calc(100vh * 4 / 3), calc(100vw - var(--sidebar-width)));
    height: min(100vh, calc((100vw - var(--sidebar-width)) * 3 / 4));
}

/* 4 streams: 2x2 grid of 4:3 cells */
.grid[data-count="4"] {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    /* 2 cols x 4:3 = 8:6 = 4:3 overall */
    width: min(calc(100vh * 4 / 3), calc(100vw - var(--sidebar-width)));
    height: min(100vh, calc((100vw - var(--sidebar-width)) * 3 / 4));
}

/* 9 streams: 3x3 grid of 4:3 cells */
.grid[data-count="9"] {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    /* 3 cols x 4:3 = 12:9 = 4:3 overall */
    width: min(calc(100vh * 4 / 3), calc(100vw - var(--sidebar-width)));
    height: min(100vh, calc((100vw - var(--sidebar-width)) * 3 / 4));
}

/* Stream container */
.stream-container {
    position: relative;
    background: var(--bg-secondary);
    overflow: hidden;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.stream-container:hover {
    z-index: 10;
}

.stream-container canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.stream-container .stream-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.9));
    padding: 20px 10px 8px;
    font-size: 9px;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 10;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.stream-container.error {
    background: #0a0505;
}

/* Fullscreen mode */
.stream-container.fullscreen {
    position: fixed !important;
    inset: 0 !important;
    z-index: 500 !important;
    background: var(--bg-primary);
    width: 100vw !important;
    height: 100vh !important;
}

.stream-container.fullscreen canvas {
    width: 100vw;
    height: 100vh;
    object-fit: contain;
}

.stream-container.fullscreen .stream-info {
    font-size: 12px;
    padding: 30px 20px 15px;
}

#main.has-fullscreen .stream-container:not(.fullscreen) {
    display: none;
}

/* Guidance Overlay */
#guidance-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.guidance-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    max-width: 90vw;
    max-height: 90vh;
}

#guidance-canvas {
    max-width: 100%;
    max-height: 60vh;
    border: 1px solid var(--border-color);
}

.guidance-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.guidance-controls button {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 32px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s ease;
}

.guidance-controls button:hover {
    color: var(--text-primary);
    border-color: var(--border-active);
}

#guidance-counter {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 1px;
    min-width: 80px;
    text-align: center;
}

.guidance-info {
    display: flex;
    gap: 30px;
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.guidance-detections {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    max-width: 600px;
}

.guidance-detections span {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    font-size: 9px;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.guidance-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

#save-detections,
#close-guidance {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 10px 24px;
    cursor: pointer;
    font-family: inherit;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.2s ease;
    margin-top: 20px;
}

#save-detections:hover,
#close-guidance:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

#save-detections:disabled {
    opacity: 0.5;
    cursor: wait;
}

/* Scanlines overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.1) 2px,
        rgba(0,0,0,0.1) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

/* Mobile - sidebar becomes top bar, single stream */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }
    
    body {
        flex-direction: column;
    }
    
    #sidebar {
        width: 100%;
        min-width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-content {
        flex-direction: row;
        flex-wrap: wrap;
        padding: 10px;
        gap: 10px;
        align-items: center;
    }
    
    .control-group {
        flex-direction: row;
        align-items: center;
        gap: 6px;
    }
    
    .control-group label {
        display: none;
    }
    
    .volume-group {
        width: 80px;
    }
    
    #guidance-btn,
    #refresh {
        width: auto;
        padding: 6px 10px;
        font-size: 8px;
    }
    
    #info {
        flex-direction: row;
        gap: 10px;
        padding: 0;
        border: none;
        margin: 0;
    }
    
    #main {
        height: calc(100vh - 60px);
    }
    
    .grid[data-count="9"],
    .grid[data-count="4"] {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
        width: min(calc((100vh - 60px) * 4 / 3), 100vw);
        height: min(calc(100vh - 60px), calc(100vw * 3 / 4));
    }
    
    .grid[data-count="1"] {
        width: min(calc((100vh - 60px) * 4 / 3), 100vw);
        height: min(calc(100vh - 60px), calc(100vw * 3 / 4));
    }
    
    .grid[data-count="9"] .stream-container:not(:first-child),
    .grid[data-count="4"] .stream-container:not(:first-child) {
        display: none;
    }
}