@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600&display=swap');

:root {
    --bg-color: #ffffff;
    --surface-color: #ffffff;
    --text-color: #000000;
    --border-color: #e5e5e5;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-deep: rgba(0, 0, 0, 0.2);

    --bar-color: #1a1a1a;
    --bar-compare: #d4d4d4;
    --bar-swap: #737373;
    --bar-sorted: #000000;

    --bar-width: 20px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Minimalist Header */
header {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    /* Clean shadow instead of blur */
    box-shadow: 0 4px 6px -1px var(--shadow-color), 0 2px 4px -1px var(--shadow-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

.controls {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.7rem;
    color: #525252;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Custom Range Slider (Minimalist) */
input[type=range] {
    width: 150px;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 14px;
    width: 14px;
    background: #000;
    border: 2px solid #fff;
    border-radius: 50%;
    cursor: pointer;
    margin-top: -5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    background: #333;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: #e5e5e5;
    border-radius: 2px;
}

/* Button & Dropdown Styling (Shadow aesthetic) */
button,
select {
    background: #fff;
    border: 1px solid #e5e5e5;
    color: #000;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px var(--shadow-color);
}

button:hover,
select:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px var(--shadow-deep);
    border-color: #000;
}

button:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px var(--shadow-color);
}

button.primary-btn {
    background: #000;
    color: #fff;
    border: 1px solid #000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

button.primary-btn:hover {
    background: #222;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

/* Main Visualizer Area */
main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    padding: 2rem;
    height: 100%;
    max-width: 100%;
    overflow: hidden;
    position: relative;
    min-height: 600px;
}

.info {
    display: flex;
    justify-content: center;
    align-items: end;
    font-size: 1.2rem;
    font-family: monospace;
    padding: 40px;
}

.cycle {
    display: flex;
    justify-content: center;
    align-items: end;
    font-size: 1.2rem;
    font-family: monospace;
    padding: 40px;
}

.bars-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 400px;
    width: 70%;
    gap: 4px;
}

.bar {
    background: var(--bar-color);
    width: var(--bar-width);
    border-radius: 2px 2px 0 0;
    transition: height 0.1s ease-in-out, background-color 0.1s ease;
    /* Subtle shadow for bars */
    /* box-shadow: 0 2px 4px rgba(0,0,0,0.1); */
}

/* Utilities */
.disabled {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
    box-shadow: none !important;
    transform: none !important;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        align-items: stretch;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .bars-container {
        padding-top: 2rem;
    }
}