/* ============================================
   SORTING VISUALIZER - ULTRA UX/UI DESIGN
   ============================================ */

:root {
    /* Color Palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.3);

    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --accent-glow: rgba(99, 102, 241, 0.4);

    /* Status Colors */
    --color-comparing: #f59e0b;
    --color-swapping: #ef4444;
    --color-sorted: #10b981;
    --color-default: #6366f1;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
    top: 50%;
    right: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.3) 0%, transparent 70%);
    bottom: -100px;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(50px, -50px) scale(1.1);
    }

    50% {
        transform: translate(-30px, 30px) scale(0.95);
    }

    75% {
        transform: translate(40px, 20px) scale(1.05);
    }
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInDown 0.8s ease-out;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    font-size: 2.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.header h1 {
    font-size: 3rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 8px 32px var(--glass-shadow);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.glass-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Controls */
.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: end;
}

.control-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Custom Range Slider */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--accent-gradient);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 20px var(--accent-glow);
    transition: transform var(--transition-fast);
}

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

.range-value {
    min-width: 40px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
    color: var(--accent-primary);
}

/* Select Dropdown */
.select-input {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-base);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='white' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.select-input:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-primary);
}

.select-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-input option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-sm);
}

/* Buttons */
.button-group {
    display: flex;
    gap: var(--spacing-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-icon {
    font-size: 1.1rem;
}

/* Visualizer Grid */
.selection-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--glass-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.selection-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-small:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.visualizer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

/* Algorithm Card Selection */
.algo-title-wrap {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.algo-checkbox {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-primary);
    border-radius: 4px;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.algo-checkbox:checked {
    background: var(--accent-gradient);
    border-color: transparent;
}

.algo-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.algo-checkbox:hover {
    box-shadow: 0 0 10px var(--accent-glow);
}

.algo-card:not(.selected) {
    opacity: 0.5;
    filter: grayscale(0.5);
}

.algo-card:not(.selected) .bars-container {
    opacity: 0.3;
}

.algo-card.selected {
    opacity: 1;
    filter: none;
}

/* Algorithm Card */
.algo-card {
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    position: relative;
}

.algo-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 2px;
    background: transparent;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background var(--transition-base);
}

.algo-card:hover::before {
    background: var(--accent-gradient);
}

.algo-card.winner {
    border-color: var(--color-sorted);
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.3);
}

.algo-card.winner::after {
    content: '🏆';
    position: absolute;
    top: -15px;
    right: 20px;
    font-size: 2rem;
    animation: bounce 1s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.algo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.algo-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.complexity-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.complexity-badge.fast {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-sorted);
}

/* 💀 HORROR THEME FOR BOGO SORT */
.complexity-badge.horror {
    background: linear-gradient(135deg, #4a0000, #8b0000);
    color: #ff4444;
    animation: horrorPulse 2s infinite;
    text-shadow: 0 0 10px #ff0000;
}

@keyframes horrorPulse {

    0%,
    100% {
        box-shadow: 0 0 5px #ff0000, inset 0 0 5px rgba(255, 0, 0, 0.3);
    }

    50% {
        box-shadow: 0 0 20px #ff0000, 0 0 30px #8b0000, inset 0 0 10px rgba(255, 0, 0, 0.5);
    }
}

.horror-card {
    background: linear-gradient(180deg, rgba(74, 0, 0, 0.3) 0%, rgba(20, 0, 0, 0.5) 100%);
    border: 1px solid rgba(139, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.horror-card::before {
    background: linear-gradient(135deg, #8b0000, #dc143c) !important;
}

.horror-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #ff0000, #8b0000, #ff0000, transparent);
    animation: bloodDrip 3s infinite;
}

@keyframes bloodDrip {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }
}

.horror-card .algo-header h3 {
    color: #ff4444;
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
}

.horror-container {
    background: linear-gradient(180deg, rgba(20, 0, 0, 0.8) 0%, rgba(74, 0, 0, 0.5) 100%);
    border: 1px solid rgba(139, 0, 0, 0.3);
    position: relative;
}

.horror-container::before {
    content: '☠️';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    opacity: 0.1;
    z-index: 0;
}

.horror-bar {
    animation: horrorFlicker 0.2s infinite;
}

@keyframes horrorFlicker {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

.horror-text {
    color: #ff6666 !important;
}

.horror-progress {
    background: rgba(74, 0, 0, 0.5);
    border: 1px solid rgba(139, 0, 0, 0.3);
}

.horror-fill {
    background: linear-gradient(90deg, #4a0000, #8b0000, #dc143c) !important;
    animation: bloodFlow 1s infinite linear;
}

@keyframes bloodFlow {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 100% 50%;
    }
}

.horror-warning {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(139, 0, 0, 0.2);
    border: 1px solid rgba(255, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    color: #ff6666;
    text-align: center;
    animation: warningBlink 2s infinite;
}

@keyframes warningBlink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

/* Bars Container */
.bars-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 1px;
    height: 120px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.bar {
    flex: 1;
    max-width: 8px;
    min-width: 2px;
    background: var(--accent-gradient);
    border-radius: 2px 2px 0 0;
    transition: height 0.05s ease, background 0.15s ease;
}

.bar.comparing {
    background: var(--color-comparing);
    box-shadow: 0 0 10px var(--color-comparing);
}

.bar.swapping {
    background: var(--color-swapping);
    box-shadow: 0 0 10px var(--color-swapping);
}

.bar.sorted {
    background: var(--color-sorted);
}

/* Stats */
.algo-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--spacing-md);
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.stat-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Progress Bar */
.progress-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.1s ease;
}

.progress-fill.complete {
    background: var(--color-sorted);
}

/* Results Card */
.results-card {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.results-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.result-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.result-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.result-item.first {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.result-rank {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.1rem;
}

.result-rank.gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #000;
}

.result-rank.silver {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
    color: #000;
}

.result-rank.bronze {
    background: linear-gradient(135deg, #d97706, #b45309);
    color: #fff;
}

.result-rank.other {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.result-info {
    flex: 1;
}

.result-name {
    font-weight: 600;
    font-size: 1rem;
}

.result-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.result-bar-container {
    flex: 2;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.result-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 0.8s ease-out;
}

.result-item.first .result-bar {
    background: linear-gradient(90deg, #10b981, #34d399);
}

/* Info Card */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.info-item {
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent-primary);
}

.info-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.info-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 1200px) {
    .visualizer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .header h1 {
        font-size: 2rem;
    }

    .controls-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .visualizer-grid {
        grid-template-columns: 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }
}