/* ======================================
   Chef d'Orchestre AI — Wireframe Edition
   Technical / Minimalist / Filaire
   ====================================== */

/* --- Reset & Variables --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-black: #020205;
    --bg-surface: rgba(10, 10, 20, 0.8);
    --border-color: rgba(0, 242, 255, 0.25);
    --border-color-active: rgba(0, 242, 255, 0.8);
    --cyan: #00f2ff;
    --cyan-dim: rgba(0, 242, 255, 0.1);
    --gold: #ffd700;
    --gold-dim: rgba(255, 215, 0, 0.15);
    --text: #ffffff;
    --text-dim: rgba(255, 255, 255, 0.5);
    --mono: 'JetBrains Mono', monospace;
    --inter: 'Inter', sans-serif;
    --radius: 2px; /* Sharp technical edges */
    --transition: 0.15s ease-out; /* Snappy */
}

body {
    font-family: var(--inter);
    background-color: var(--bg-black);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- Blueprint Technical Grid --- */
#bg-gradient {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image: 
        linear-gradient(var(--cyan-dim) 1px, transparent 1px),
        linear-gradient(90deg, var(--cyan-dim) 1px, transparent 1px);
    background-size: 40px 40px; /* Major Grid */
    background-position: center;
}

#bg-gradient::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 242, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 255, 0.05) 1px, transparent 1px);
    background-size: 8px 8px; /* Minor Grid */
    background-position: center;
    pointer-events: none;
}

/* Overlay gradient for depth */
#bg-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, transparent 30%, var(--bg-black) 95%);
}

/* --- Layout --- */
#app {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 20px;
    gap: 20px;
    min-height: 100vh;
}

/* --- Navigation & Header --- */
header {
    text-align: center;
    margin-bottom: 20px;
}

.logo-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    background: var(--bg-surface);
}

.logo-icon {
    font-size: 1.5rem;
}

h1 {
    font-family: var(--mono);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--cyan);
}

h1 .highlight {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.subtitle {
    font-family: var(--mono);
    font-size: 0.65rem;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 8px;
}

/* --- Stage Layout --- */
.stage {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 660px;
    gap: 0; /* Continuous wireframe look */
}

.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #000;
    border: 1px solid var(--border-color-active);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.05);
}

/* Technical L-Corners (Filaire Look) */
.video-container::before, .video-container::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--cyan);
    z-index: 15;
    pointer-events: none;
}

.video-container::before { top: -5px; left: -5px; border-right: 0; border-bottom: 0; }
.video-container::after { bottom: -5px; right: -5px; border-left: 0; border-top: 0; }

#canvas, #particle-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(-1);
}

/* --- HUD (Technical Filaire) --- */
.hud-left, .hud-right, .hud-top {
    position: absolute;
    z-index: 5;
    pointer-events: none;
}

.hud-left {
    left: 20px;
    bottom: 20px;
}

.hud-note {
    font-family: var(--mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--cyan);
    text-shadow: 0 0 10px var(--cyan);
}

.hud-right {
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.volume-bar-container {
    width: 12px;
    height: 100px;
    border: 1px solid var(--border-color);
    background: rgba(0, 242, 255, 0.05);
    position: relative;
}

/* Segmented Volume Look (Step) */
.volume-bar-fill {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
}

.hud-top {
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
}

.hud-scale-name {
    font-family: var(--mono);
    font-size: 0.6rem;
    color: var(--gold);
    border: 1px dashed var(--gold);
    padding: 3px 10px;
}

.hud-label {
    font-family: var(--mono);
    font-size: 0.55rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

/* --- Status Overlay --- */
#status-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.9);
    z-index: 20;
    gap: 30px;
}

#status-overlay.hidden { display: none; }

#status-message {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 4px;
}

.start-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.start-button {
    font-family: var(--mono);
    font-size: 0.85rem;
    padding: 12px 30px;
    border: 1px solid var(--cyan);
    background: transparent;
    color: var(--cyan);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all var(--transition);
}

.start-button:hover {
    background: var(--cyan);
    color: #000;
}

.secondary-btn {
    border-color: var(--text-dim);
    color: var(--text-dim);
}

.secondary-btn:hover {
    border-color: var(--text);
    color: #000;
    background: var(--text);
}

/* --- Visualizer Panel --- */
.visualizer-container {
    height: 50px;
    border: 1px solid var(--border-color);
    border-top: none;
    background: rgba(0, 0, 0, 0.6);
}

/* --- Glass / Panel System --- */
.glass {
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
}

/* --- Controls Grid --- */
.controls-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1px; /* Grid border effect */
    background: var(--border-color);
    width: 100%;
    max-width: 660px;
    padding: 1px; /* Gap logic */
}

.control-group {
    background: var(--bg-black);
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-family: var(--mono);
    font-size: 0.6rem;
    color: var(--text-dim);
    text-transform: uppercase;
}

.control-group select, 
.control-group input[type="range"] {
    font-family: var(--mono);
    font-size: 0.75rem;
    background: #000;
    color: var(--cyan);
    border: 1px solid var(--border-color);
    padding: 5px;
    width: 100%;
    cursor: pointer;
}

/* Range Technical Thumb */
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    background: var(--cyan);
    border-radius: 0;
    border: 1px solid #fff;
}

/* --- Telemetry Technical Bar --- */
.telemetry {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 660px;
    padding: 8px 15px;
    background: #000;
    border: 1px dashed var(--border-color);
    font-family: var(--mono);
    font-size: 0.6rem;
}

.tel-item {
    display: flex;
    gap: 10px;
}

.tel-label { color: var(--text-dim); }
.tel-value { color: var(--cyan); font-weight: 700; }

/* --- Help / Toast --- */
.help-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    border: 1px solid var(--cyan);
    background: #000;
    padding: 15px;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text);
    max-width: 280px;
    opacity: 0;
    transition: opacity 0.5s;
    z-index: 100;
}

.help-toast.visible { opacity: 1; }

.icon-btn {
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text);
    padding: 5px 15px;
    cursor: pointer;
}

.icon-btn:hover { background: var(--cyan-dim); }
.icon-btn.muted { border-color: #ff3e3e; color: #ff3e3e; }

/* --- Responsive --- */
@media (max-width: 500px) {
    #app { padding: 15px 10px; }
    h1 { font-size: 1rem; letter-spacing: 2px; }
    .telemetry { flex-direction: column; gap: 4px; }
}