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

:root {
    --phosphor: #00ff41;
    --bg: #0a0a0a;
    --surface: #111111;
    --bezel: #1a1a1a;
    --text-dim: #336633;
    --text: #00dd38;
    --glow: 0 0 10px rgba(0, 255, 65, 0.4);
    --amber: #ffb000;
    --amber-dim: #664400;
}

body {
    background: var(--bg);
    color: var(--phosphor);
    font-family: 'VT323', 'Courier New', monospace;
    min-height: 100vh;
    overflow-x: hidden;
}

#app {
    max-width: 1300px;
    margin: 0 auto;
    padding: 16px;
}

/* Header */
header {
    text-align: center;
    padding: 20px 0 10px;
}

.title {
    font-family: 'VT323', monospace;
    font-size: 52px;
    letter-spacing: 8px;
    text-transform: uppercase;
    color: var(--phosphor);
    text-shadow: 0 0 20px rgba(0, 255, 65, 0.6), 0 0 40px rgba(0, 255, 65, 0.3);
    margin-bottom: 4px;
}

.subtitle {
    font-family: 'Share Tech Mono', monospace;
    font-size: 16px;
    color: var(--text-dim);
    letter-spacing: 2px;
}

/* Main Layout */
#main-layout {
    display: flex;
    gap: 24px;
    margin-top: 16px;
}

#scope-section {
    flex: 1;
    min-width: 0;
}

/* Scope Bezel */
#scope-bezel {
    position: relative;
    background: #050505;
    border: 3px solid #2a2a2a;
    border-radius: 16px;
    padding: 12px;
    box-shadow:
        inset 0 0 30px rgba(0, 0, 0, 0.8),
        0 0 20px rgba(0, 0, 0, 0.6),
        0 2px 0 #333,
        0 -2px 0 #1a1a1a;
    aspect-ratio: 1;
    max-width: 640px;
    margin: 0 auto;
}

#canvas {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    display: block;
    background: #050505;
}

#overlay-stats {
    position: absolute;
    bottom: 18px;
    right: 18px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: rgba(0, 255, 65, 0.25);
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

#fps-counter, #blanked-counter {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: rgba(0, 255, 65, 0.25);
}

#video-pip {
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 120px;
    border-radius: 4px;
    border: 1px solid #333;
    z-index: 5;
    opacity: 0.85;
}

/* Transport */
#transport {
    max-width: 640px;
    margin: 12px auto 0;
}

#time-display {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    color: var(--text-dim);
}

#seek-bar {
    flex: 1;
}

#transport-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}

/* Buttons */
.retro-btn {
    font-family: 'VT323', monospace;
    font-size: 20px;
    padding: 8px 24px;
    background: #1a1a1a;
    color: var(--phosphor);
    border: 2px solid #333;
    border-radius: 6px;
    cursor: pointer;
    text-shadow: var(--glow);
    transition: all 0.15s;
    letter-spacing: 2px;
}

.retro-btn:hover:not(:disabled) {
    background: #222;
    border-color: var(--phosphor);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.3);
}

.retro-btn:active:not(:disabled) {
    transform: scale(0.97);
}

.retro-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.retro-btn.small {
    font-size: 16px;
    padding: 8px 14px;
}

.retro-btn.playing {
    border-color: var(--phosphor);
    box-shadow: 0 0 12px rgba(0, 255, 65, 0.4);
}

/* Drop Zone */
#drop-zone {
    max-width: 640px;
    margin: 14px auto 0;
    border: 2px dashed #2a3a2a;
    border-radius: 10px;
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    font-family: 'Share Tech Mono', monospace;
    font-size: 15px;
    color: var(--text-dim);
}

#drop-zone:hover,
#drop-zone.dragover {
    border-color: var(--phosphor);
    background: rgba(0, 255, 65, 0.03);
    color: var(--phosphor);
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.1);
}

#file-input {
    display: none;
}

#file-info {
    max-width: 640px;
    margin: 8px auto 0;
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    color: var(--text-dim);
    display: flex;
    justify-content: space-between;
}

#demo-section {
    max-width: 640px;
    margin: 12px auto 0;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

#demo-section .hint {
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    color: rgba(0, 255, 65, 0.2);
    width: 100%;
}

#error-msg {
    max-width: 640px;
    margin: 8px auto 0;
    padding: 10px;
    background: rgba(255, 50, 50, 0.1);
    border: 1px solid #662222;
    border-radius: 6px;
    color: #ff6666;
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
}

/* Controls Panel */
#controls-panel {
    width: 280px;
    flex-shrink: 0;
    background: var(--surface);
    border: 1px solid #222;
    border-radius: 10px;
    padding: 18px;
    align-self: flex-start;
    position: sticky;
    top: 16px;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
}

/* Scrollbar styling for controls panel */
#controls-panel::-webkit-scrollbar {
    width: 4px;
}

#controls-panel::-webkit-scrollbar-track {
    background: #111;
}

#controls-panel::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 2px;
}

.panel-title {
    font-family: 'VT323', monospace;
    font-size: 22px;
    letter-spacing: 4px;
    color: var(--text-dim);
    text-align: center;
    margin-bottom: 16px;
    border-bottom: 1px solid #222;
    padding-bottom: 10px;
}

.control-group {
    margin-bottom: 14px;
}

.control-group label {
    display: block;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.control-group input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: #222;
    border-radius: 3px;
    outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--phosphor);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 255, 65, 0.5);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--phosphor);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px rgba(0, 255, 65, 0.5);
}

.ctrl-value {
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    color: var(--phosphor);
    float: right;
    margin-top: -2px;
}

#color-picker {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.color-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid #333;
    cursor: pointer;
    transition: all 0.15s;
}

.color-btn:hover {
    transform: scale(1.15);
}

.color-btn.active {
    border-color: #fff;
    box-shadow: 0 0 10px currentColor;
}

.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-row label {
    margin-bottom: 0;
}

.toggle-btn {
    font-family: 'VT323', monospace;
    font-size: 16px;
    padding: 3px 14px;
    background: #1a1a1a;
    color: #555;
    border: 1px solid #333;
    border-radius: 4px;
    cursor: pointer;
    min-width: 50px;
    transition: all 0.15s;
}

.toggle-btn.active {
    color: var(--phosphor);
    border-color: var(--phosphor);
    text-shadow: var(--glow);
}

/* === Z-AXIS / BLANKING Section === */
#blanking-section {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid #2a1f00;
}

.blanking-title {
    font-family: 'VT323', monospace;
    font-size: 18px;
    letter-spacing: 3px;
    color: var(--amber);
    text-align: center;
    margin-bottom: 14px;
    text-shadow: 0 0 10px rgba(255, 176, 0, 0.3);
}

#blanking-section .control-group label {
    color: var(--amber-dim);
}

#blanking-section .ctrl-value {
    color: var(--amber);
}

#blanking-section .toggle-btn.active {
    color: var(--amber);
    border-color: var(--amber);
    text-shadow: 0 0 10px rgba(255, 176, 0, 0.4);
}

#blanking-section input[type="range"]::-webkit-slider-thumb {
    background: var(--amber);
    box-shadow: 0 0 8px rgba(255, 176, 0, 0.5);
}

#blanking-section input[type="range"]::-moz-range-thumb {
    background: var(--amber);
    box-shadow: 0 0 8px rgba(255, 176, 0, 0.5);
}

.blanking-toggle-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Retrace LED */
.retrace-led {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #1a0a00;
    border: 1px solid #332200;
    transition: all 0.08s ease-out;
    flex-shrink: 0;
}

.retrace-led.active {
    background: #ff6600;
    border-color: #ff8800;
    box-shadow: 0 0 8px rgba(255, 102, 0, 0.8), 0 0 16px rgba(255, 102, 0, 0.4);
}

/* Blanking Mode Picker */
#blanking-mode-picker {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

.mode-btn {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    background: #1a1a1a;
    color: #555;
    border: 1px solid #333;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
    flex: 1;
    text-align: center;
}

.mode-btn:hover {
    border-color: #666;
    color: #888;
}

.mode-btn.active {
    color: var(--amber);
    border-color: var(--amber);
    text-shadow: 0 0 8px rgba(255, 176, 0, 0.3);
    background: rgba(255, 176, 0, 0.05);
}

/* Seek bar styling */
#seek-bar {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: #222;
    border-radius: 2px;
    outline: none;
}

#seek-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--phosphor);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 255, 65, 0.5);
}

#seek-bar::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--phosphor);
    cursor: pointer;
    border: none;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0 16px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    color: rgba(0, 255, 65, 0.2);
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

footer a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--phosphor);
    text-shadow: var(--glow);
}

/* Fullscreen */
#scope-bezel:fullscreen,
#scope-bezel:-webkit-full-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    border: none;
    border-radius: 0;
    padding: 0;
    max-width: none;
}

#scope-bezel:fullscreen #canvas {
    max-width: 100vmin;
    max-height: 100vmin;
    width: 100vmin;
    height: 100vmin;
}

/* Mobile */
@media (max-width: 900px) {
    #main-layout {
        flex-direction: column;
    }

    #controls-panel {
        width: 100%;
        position: static;
        max-height: none;
    }

    #scope-bezel {
        max-width: 100%;
    }

    .title {
        font-size: 36px;
    }
}

@media (max-width: 500px) {
    #app {
        padding: 8px;
    }

    .title {
        font-size: 28px;
        letter-spacing: 4px;
    }

    .subtitle {
        font-size: 12px;
    }

    .retro-btn {
        font-size: 16px;
        padding: 6px 14px;
    }

    #drop-zone {
        padding: 18px 12px;
        font-size: 13px;
    }

    #scope-bezel {
        padding: 6px;
        border-width: 2px;
    }

    #demo-section {
        gap: 6px;
    }

    #demo-section .retro-btn {
        font-size: 14px;
        padding: 5px 10px;
    }
}