:root {
    --primary: #00f2ea;
    --secondary: #ff0050;
    --bg-dark: #050505;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #fff;
    --text-muted: #a0a0a0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background: #0a0a1a;
    color: var(--text-main);
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 10px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Controls */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 30px;
    align-items: center;
}

.controls select,
.controls input {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 15px;
    color: #fff;
    font-size: 0.9rem;
    outline: none;
}

.controls select:focus,
.controls input:focus {
    border-color: var(--primary);
}

.slider-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.slider-label input[type="range"] {
    width: 100px;
    vertical-align: middle;
}

.controls button {
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: 10px;
    padding: 10px 20px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.controls button:hover {
    background: var(--secondary);
    color: #fff;
}

.controls button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.controls button.reset {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.controls button.reset:hover {
    background: var(--primary);
    color: #000;
}

/* Visualizer */
.visualizer {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px 20px;
    min-height: 350px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 3px;
    box-shadow: 0 0 30px rgba(0, 242, 234, 0.1);
}

.bar {
    background: var(--primary);
    border-radius: 4px 4px 0 0;
    transition: height 0.1s ease;
    min-width: 4px;
}

.bar.comparing {
    background: var(--secondary);
}

.bar.sorted {
    background: #00ff88;
}

.bar.pivot {
    background: #ffd700;
}

/* Legend */
.legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 15px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
}

.legend-color.unsorted {
    background: var(--primary);
}

.legend-color.comparing {
    background: var(--secondary);
}

.legend-color.pivot {
    background: #ffd700;
}

.legend-color.sorted {
    background: #00ff88;
}

/* Info Panel */
.info {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.info-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 20px;
    flex: 1;
    min-width: 120px;
    text-align: center;
}

.info-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.info-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

/* Back Link */
.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    z-index: 10;
}

.back-link:hover {
    color: var(--secondary);
}

/* Responsive */
@media (max-width: 600px) {
    .visualizer {
        padding: 20px 10px;
        min-height: 250px;
    }

    .controls {
        gap: 8px;
    }
}