body {
    background-color: #0a0f1e;
    color: #f8fafc;
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#main-header {
    width: 100%;
    padding: 15px 0;
    text-align: center;
    background: rgba(30, 41, 59, 0.5);
    border-bottom: 1px solid #1e293b;
}

#main-header h1 {
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: 4px;
    text-transform: uppercase;
}

#main-container {
    display: flex;
    width: 100%;
    flex: 1;
    min-height: 0;
}

/* PANNEAU GAUCHE */
#left-panel {
    width: 20%;
    padding: 20px;
    background: rgba(255,255,255,0.02);
    border-right: 1px solid #1e293b;
    z-index: 10;
}

.control-group h3 { color: #38bdf8; font-size: 0.9rem; margin-bottom: 20px; }

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

input[type=range] { flex: 1; cursor: pointer; }

.freq-label { font-size: 0.8rem; color: #94a3b8; }

.instruction-box {
    margin-top: 30px;
    font-size: 0.85rem;
    color: #94a3b8;
    line-height: 1.6;
    padding: 15px;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 8px;
    border: 1px solid #1e293b;
}

/* ZONE CENTRALE (CANVAS) */
#builder-zone {
    width: 60%;
    position: relative;
    background: #050505;
}

canvas { width: 100%; height: 100%; display: block; }

/* PANNEAU DROIT (DATA) */
#info-zone {
    width: 20%;
    padding: 20px;
    background: rgba(255,255,255,0.02);
    border-left: 1px solid #1e293b;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#info-title { font-size: 1.2rem; color: #38bdf8; margin-bottom: 40px; }

.data-card {
    width: 100%;
    background: rgba(30, 41, 59, 0.5);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: center;
    border: 1px solid #1e293b;
}

.data-card .label { font-size: 0.8rem; color: #94a3b8; display: block; margin-bottom: 5px; font-weight: bold; }
.data-card .value { font-size: 1.3rem; font-weight: bold; font-family: monospace; }

.highlight { border-color: #38bdf8; background: rgba(56, 189, 248, 0.1); }
.highlight .value { color: #38bdf8; }

.data-divider { width: 50px; height: 2px; background: #1e293b; margin: 10px 0 25px 0; }