:root {
    --bg-primary: #060a12;
    --bg-secondary: #0d1423;
    --bg-tertiary: #141f36;
    --border: #203153;
    --text: #e8eaed;
    --muted: #8b95a5;
    --cyan: #00e5ff;
    --pink: #ff3366;
    --orange: #ff9100;
    --green: #76ff03;
    --danger: #ff1744;
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }
html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
    color: var(--text);
    font-family: var(--font-body);
}

#app {
    height: 100%;
    display: grid;
    grid-template-rows: auto 1fr;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: rgba(13, 20, 35, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.back-link {
    color: var(--pink);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.brand h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 20px;
    letter-spacing: 1px;
}

.main-grid {
    min-height: 0;
    display: grid;
    grid-template-columns: 270px 1fr 270px;
    position: relative;
}

.panel {
    min-height: 0;
    overflow: auto;
    padding: 12px;
    background: rgba(13, 20, 35, 0.85);
    backdrop-filter: blur(12px);
    z-index: 10;
}

.controls { border-right: 1px solid var(--border); }
.readout { border-left: 1px solid var(--border); }

.group {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
    background: rgba(20, 31, 54, 0.45);
}

.group h2 {
    margin: 0 0 8px;
    font-family: var(--font-display);
    font-size: 12px;
    color: var(--pink);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn {
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    width: 100%;
}

.btn:hover {
    border-color: var(--pink);
    color: var(--pink);
}

.btn.active {
    border-color: var(--pink);
    color: var(--pink);
    background: rgba(255, 51, 102, 0.1);
}

.slider-label {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    margin-bottom: 2px;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--pink);
}

.sim-wrap {
    position: relative;
    min-width: 0;
    min-height: 0;
}

#sim-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.overlay {
    position: absolute;
    top: 10px;
    left: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--green);
    border: 1px solid rgba(118, 255, 3, 0.4);
    background: rgba(8, 16, 24, 0.7);
    border-radius: 8px;
    padding: 6px 10px;
    z-index: 5;
}

.mono {
    font-family: var(--font-mono);
    font-size: 12px;
    color: #c6d2e3;
    white-space: pre-line;
    background: rgba(6, 10, 18, 0.75);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    margin-bottom: 8px;
}

.top-actions {
    display: flex;
    gap: 8px;
}