:root {
    --green-phosphor: #33ff33;
    --green-dim: #1a8c1a;
    --green-glow: #33ff3380;
    --amber: #ffaa00;
    --amber-dim: #aa7700;
    --crt-bg: #0a0a0a;
    --panel-bg: #1a1a1a;
    --panel-border: #333;
    --bezel: #0d0d0d;
}

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

body {
    background: #111;
    font-family: 'JetBrains Mono', monospace;
    color: #ccc;
    overflow: hidden;
    height: 100vh;
}

.crt-container {
    position: relative;
    background: var(--bezel);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 
        0 0 40px rgba(0,0,0,0.8),
        inset 0 0 20px rgba(0,0,0,0.5);
    border: 3px solid #222;
}

.crt-screen {
    position: relative;
    background: var(--crt-bg);
    border-radius: 10px;
    overflow: hidden;
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    line-height: 1.4;
    color: var(--green-phosphor);
    text-shadow: 0 0 5px var(--green-glow), 0 0 10px var(--green-glow);
    padding: 16px;
    min-height: 400px;
    cursor: text;
}

.crt-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.15) 2px,
        rgba(0,0,0,0.15) 4px
    );
    pointer-events: none;
    z-index: 2;
}

.crt-screen::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.4) 100%);
    pointer-events: none;
    z-index: 3;
}

.cursor-blink {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.control-panel {
    background: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 100%);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    box-shadow: 
        0 2px 10px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.05);
}

.hw-button {
    background: linear-gradient(180deg, #444 0%, #222 100%);
    border: 2px solid #555;
    border-radius: 4px;
    color: #ddd;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    padding: 6px 12px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.1s;
    box-shadow: 0 3px 0 #111, 0 4px 6px rgba(0,0,0,0.4);
}

.hw-button:active {
    transform: translateY(2px);
    box-shadow: 0 1px 0 #111, 0 1px 3px rgba(0,0,0,0.4);
}

.hw-button:hover {
    border-color: var(--amber);
}

.hw-button.active {
    background: linear-gradient(180deg, #553300 0%, #332200 100%);
    border-color: var(--amber);
    color: var(--amber);
}

.register-display {
    font-family: 'Share Tech Mono', monospace;
    color: var(--amber);
    text-shadow: 0 0 3px var(--amber-dim);
    font-size: 13px;
}

.flag-on {
    color: var(--amber);
    text-shadow: 0 0 5px var(--amber);
}

.flag-off {
    color: #444;
}

.speed-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #333;
    border-radius: 3px;
    outline: none;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--amber);
    cursor: pointer;
    box-shadow: 0 0 5px var(--amber-dim);
}

.memory-viewer {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: var(--green-dim);
    background: #0a0a0a;
    border: 1px solid #222;
    border-radius: 4px;
}

.memory-viewer .addr {
    color: var(--amber);
}

.memory-viewer .ascii {
    color: #666;
}

.file-upload-zone {
    border: 2px dashed #444;
    border-radius: 8px;
    transition: all 0.2s;
}

.file-upload-zone:hover, .file-upload-zone.drag-over {
    border-color: var(--amber);
    background: rgba(255, 170, 0, 0.05);
}

.status-led {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-led.on {
    background: var(--green-phosphor);
    box-shadow: 0 0 6px var(--green-phosphor);
}

.status-led.off {
    background: #333;
}

@media (max-width: 768px) {
    .crt-screen {
        font-size: 10px;
        min-height: 300px;
        padding: 8px;
    }
    .crt-container {
        padding: 10px;
        border-radius: 12px;
    }
}