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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --accent-blue: #4facfe;
    --accent-purple: #667eea;
    --accent-pink: #f093fb;
    --accent-orange: #ff9a56;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --class-positive: #00f2fe;
    --class-negative: #f5576c;
    --border-radius: 12px;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Controls */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: flex-end;
    padding: 25px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

select {
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    min-width: 100px;
}

select:hover {
    border-color: var(--accent-blue);
}

select:focus {
    outline: none;
    border-color: var(--accent-purple);
}

.layer-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-card);
    padding: 8px 15px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.layer-controls span {
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

.btn-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--accent-purple);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: var(--accent-pink);
    transform: scale(1.1);
}

.control-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(79, 172, 254, 0.4);
}

.btn-primary.running {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-orange));
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.play-icon {
    font-size: 0.8rem;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 30px;
    margin-bottom: 30px;
}

.visualization-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.canvas-container {
    position: relative;
    margin-bottom: 20px;
}

#mainCanvas {
    width: 100%;
    height: 400px;
    border-radius: 8px;
    background: var(--bg-card);
}

.canvas-label {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.6);
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stats {
    display: flex;
    justify-content: space-around;
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Network Panel */
.network-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.network-panel h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    text-align: center;
}

#networkCanvas {
    width: 100%;
    height: 400px;
    border-radius: 8px;
}

/* Loss Chart */
.loss-chart-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.loss-chart-container h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

#lossChart {
    width: 100%;
    height: 150px;
    border-radius: 8px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
}

.footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.footer a:hover {
    color: var(--accent-pink);
}

/* Responsive */
@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .control-group {
        width: 100%;
    }

    select {
        width: 100%;
    }

    .control-buttons {
        justify-content: center;
    }
}