:root {
    --bg-color: #050508;
    --panel-bg: rgba(16, 20, 25, 0.85);
    --neon-cyan: #00f3ff;
    --neon-pink: #ff0055;
    --neon-green: #00ff9d;
    --text-main: #c0c5ce;
    --border-color: #2a2e35;
}

* { box-sizing: border-box; user-select: none; }

body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Share Tech Mono', monospace;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- HEADER --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(90deg, #000 0%, #111 100%);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.1);
    height: 70px;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    color: var(--neon-cyan);
    margin: 0;
    font-size: 1.5rem;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--neon-cyan);
}

.status-badge {
    font-size: 0.8rem;
    color: var(--neon-green);
    border: 1px solid var(--neon-green);
    padding: 4px 10px;
    border-radius: 4px;
    text-transform: uppercase;
}

/* --- MAIN LAYOUT --- */
main {
    display: grid;
    grid-template-columns: 1fr 350px;
    flex: 1;
    height: calc(100vh - 75px); /* Ajuste preciso */
    overflow: hidden;
}

/* VISUAL AREA */
.visual-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1a1e24 0%, #000 100%);
    overflow: hidden;
    padding: 10px; /* Menos padding para más imagen */
    width: 100%;
    height: 100%;
}

#canvasContainer {
    position: relative;
    box-shadow: 0 0 50px rgba(0,0,0,0.8);
    border: 1px solid var(--border-color);
    /* Eliminamos max-width/height restrictivos del contenedor para que JS controle el tamaño exacto */
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    /* El tamaño lo controlará JS, CSS solo asegura que no se desborde */
    max-width: 100%; 
    max-height: 100%;
    object-fit: contain;
}

#scanLine {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 2px;
    background: var(--neon-pink);
    box-shadow: 0 0 15px var(--neon-pink);
    z-index: 10;
    pointer-events: none;
    display: none;
    transition: left 0.05s linear; /* Smooth visual update */
}

.placeholder {
    position: absolute;
    text-align: center;
    color: #444;
    pointer-events: none;
    width: 100%;
}
.placeholder i { font-size: 4rem; margin-bottom: 1rem; display: block; }

/* CONTROLS AREA */
.controls-panel {
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    padding: 1rem;
    overflow-y: auto;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 100%;
}

.control-group {
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 4px;
    background: rgba(0,0,0,0.2);
    position: relative;
}

.control-group h3 {
    margin: -20px 0 10px 0;
    background: var(--bg-color);
    display: inline-block;
    padding: 0 5px;
    font-size: 0.9rem;
    color: var(--neon-cyan);
    text-transform: uppercase;
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    gap: 10px;
}

label { font-size: 0.8rem; color: #888; }
.val-display { font-size: 0.8rem; color: var(--neon-green); font-weight: bold; width: 40px; text-align: right; }

/* SLIDERS */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 14px;
    width: 14px;
    background: var(--neon-cyan);
    border-radius: 50%;
    margin-top: -5px;
    box-shadow: 0 0 10px var(--neon-cyan);
    cursor: pointer;
}
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: #333;
    border-radius: 2px;
}

/* BUTTONS */
.btn {
    background: transparent;
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 8px 16px;
    font-family: 'Share Tech Mono', monospace;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s;
    font-size: 0.9rem;
    width: 100%;
    margin-bottom: 5px;
}
.btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 15px var(--neon-cyan);
}
.btn.danger {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
}
.btn.danger:hover { background: var(--neon-pink); color: white; box-shadow: 0 0 15px var(--neon-pink); }

.btn.recording {
    background: var(--neon-pink);
    color: white;
    animation: pulse 1s infinite;
}

.grid-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
    margin-bottom: 10px;
}
.filter-btn, .wave-btn {
    background: #111;
    border: 1px solid #444;
    color: #666;
    padding: 5px;
    font-size: 0.7rem;
    cursor: pointer;
}
.filter-btn.active, .wave-btn.active {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    background: rgba(0, 243, 255, 0.1);
}

/* FILE INPUT */
input[type="file"] { display: none; }
.upload-label {
    display: block;
    text-align: center;
    border: 1px dashed #444;
    padding: 1rem;
    cursor: pointer;
    color: #666;
    transition: 0.2s;
}
.upload-label:hover { border-color: var(--neon-cyan); color: var(--neon-cyan); }

/* FOOTER / METERS */
.footer-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: #111;
    z-index: 100;
}
#audioMeter {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
    transition: width 0.05s;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* RESPONSIVE */
@media (max-width: 900px) {
    main { grid-template-columns: 1fr; height: auto; overflow: visible; }
    .visual-container { height: 50vh; min-height: 300px; }
    .controls-panel { height: auto; border-left: none; border-top: 1px solid var(--border-color); }
}