@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@200;400;700&display=swap');

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

:root {
    --glow: #00FFAA;
    --glow-dim: rgba(0, 255, 170, 0.15);
    --bg-dark: #08080a;
    --bg-panel: #111114;
    --bg-control: #18181c;
    --border: #2a2a30;
    --text-dim: #667;
    --text-mid: #99a;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-dark);
    color: #ccd;
    min-height: 100vh;
    padding: 16px;
}

.container {
    max-width: 1040px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 24px;
}

.header h1 {
    font-size: 1.6em;
    font-weight: 700;
    color: var(--glow);
    text-shadow: 0 0 20px var(--glow-dim);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.header p {
    color: var(--text-dim);
    font-size: 0.75em;
    font-weight: 200;
    margin-top: 4px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.vfd-housing {
    position: relative;
    margin-bottom: 24px;
}

.vfd-bezel {
    background: linear-gradient(180deg, #222226, #161618 30%, #111114 70%, #0c0c0e);
    border-radius: 16px;
    padding: 20px 24px;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.04) inset,
        0 -1px 0 rgba(0,0,0,0.6) inset,
        0 8px 32px rgba(0,0,0,0.6),
        0 2px 8px rgba(0,0,0,0.4);
    border: 1px solid #2a2a2e;
}

.vfd-glass {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: #010102;
    border: 1px solid #333338;
    box-shadow:
        0 0 30px rgba(0, 255, 170, 0.04) inset,
        0 2px 8px rgba(0,0,0,0.8) inset;
}

#vfd-canvas {
    width: 100%;
    height: auto;
    display: block;
    image-rendering: auto;
}

.scan-lines {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 2px,
        rgba(0,0,0,0.12) 2px,
        rgba(0,0,0,0.12) 4px
    );
    pointer-events: none;
}

.glass-reflection {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 40%;
    background: linear-gradient(180deg, rgba(255,255,255,0.025), transparent);
    pointer-events: none;
    border-radius: 8px 8px 0 0;
}

.controls {
    background: var(--bg-panel);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.input-section {
    margin-bottom: 16px;
}

.input-section label,
.control-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-dim);
    font-size: 0.7em;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.input-section input {
    width: 100%;
    padding: 10px 14px;
    font-size: 1em;
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--glow);
    text-transform: uppercase;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-section input:focus {
    outline: none;
    border-color: var(--glow);
    box-shadow: 0 0 12px rgba(0, 255, 170, 0.15);
}

.control-row {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.control-row:last-child {
    margin-bottom: 0;
}

.control-group {
    flex: 1;
    min-width: 160px;
}

.control-group select {
    width: 100%;
    padding: 8px 10px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: #ccd;
    font-family: inherit;
    font-size: 0.85em;
    cursor: pointer;
    transition: border-color 0.2s;
}

.control-group select:focus {
    outline: none;
    border-color: var(--glow);
}

.power-button,
.action-button {
    width: 100%;
    padding: 10px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-mid);
    font-family: inherit;
    font-size: 0.8em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.power-button:hover,
.action-button:hover {
    border-color: var(--glow);
    color: var(--glow);
}

.power-button.powered-on {
    background: rgba(0, 255, 170, 0.08);
    border-color: var(--glow);
    color: var(--glow);
    box-shadow: 0 0 16px rgba(0, 255, 170, 0.12);
}

.presets {
    margin-bottom: 20px;
}

.preset-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.preset-btn {
    padding: 6px 14px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.72em;
    font-weight: 400;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.preset-btn:hover {
    border-color: var(--glow);
    color: var(--glow);
    background: rgba(0, 255, 170, 0.04);
}

footer {
    text-align: center;
    padding: 16px;
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.75em;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.2s;
}

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

/* Range slider styling */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 4px;
    background: #2a2a30;
    border-radius: 2px;
    margin-top: 4px;
    border: none;
    padding: 0;
}

input[type="range"]:focus {
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--glow);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 255, 170, 0.4);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--glow);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px rgba(0, 255, 170, 0.4);
}

@media (max-width: 640px) {
    body { padding: 10px; }
    .control-row { flex-direction: column; gap: 10px; }
    .control-group { min-width: auto; }
    .header h1 { font-size: 1.2em; }
    .vfd-bezel { padding: 12px 14px; border-radius: 12px; }
}

:fullscreen .container {
    max-width: none;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

:fullscreen .controls,
:fullscreen .presets,
:fullscreen .header,
:fullscreen footer {
    display: none;
}

:fullscreen .vfd-housing {
    flex-grow: 1;
    display: flex;
    align-items: center;
}

:fullscreen .vfd-bezel {
    width: 100%;
}