/* Modern Performance Telemetry Design */
@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=DM+Sans:wght@400;500;600;700&display=swap');

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

:root {
    /* Racing Telemetry Color Palette */
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-surface: #1a1a1a;
    --bg-elevated: #222222;

    --accent-cyan: #00d9ff;
    --accent-cyan-glow: rgba(0, 217, 255, 0.3);
    --accent-red: #ef4444;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;

    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: #2a2a2a;
    --border-accent: #333;

    /* Typography */
    --font-display: 'Rajdhani', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Animated grid background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* ========== HEADER ========== */
header {
    position: relative;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -10%;
    width: 120%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(0, 217, 255, 0.05) 50%, transparent 100%);
    clip-path: polygon(0 0, 100% 0, 95% 100%, 5% 100%);
    z-index: -1;
}

header::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent-cyan));
    opacity: 0.03;
    clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
}

h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
    animation: slideInDown 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

h1::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
    box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.subtitle {
    font-family: var(--font-body);
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    animation: slideInDown 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

/* ========== STATISTICS SECTION ========== */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, var(--accent-cyan), transparent);
    transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover::before {
    height: 100%;
}

.stat-card::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 12px;
    height: 12px;
    background: var(--accent-cyan);
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.stat-card:hover::after {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: 0 8px 32px rgba(0, 217, 255, 0.15);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-cyan);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 20px var(--accent-cyan-glow);
    letter-spacing: -0.05em;
}

.stat-label {
    font-family: var(--font-display);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* Staggered animation for stats */
.stat-card:nth-child(1) { animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards; }
.stat-card:nth-child(2) { animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s backwards; }
.stat-card:nth-child(3) { animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.4s backwards; }
.stat-card:nth-child(4) { animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.5s backwards; }

/* ========== FILTERS SECTION ========== */
.filters-section {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.6s backwards;
}

.filters-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
}

.search-box {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.search-box input {
    flex: 1;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.3s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px var(--accent-cyan-glow);
    background: var(--bg-secondary);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-group label {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-group select,
.filter-group input {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: all 0.3s;
    cursor: pointer;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px var(--accent-cyan-glow);
}

.filter-group input[type="number"] {
    font-family: var(--font-mono);
}

.filter-actions {
    grid-column: 1 / -1;
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-sm);
}

/* ========== BUTTONS ========== */
.btn-primary,
.btn-secondary {
    font-family: var(--font-display);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    box-shadow: 0 8px 24px var(--accent-cyan-glow);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.btn-secondary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    border-color: var(--border-color);
}

.btn-secondary:disabled:hover {
    color: var(--text-primary);
    box-shadow: none;
}

/* ========== RESULTS SECTION ========== */
.results-section {
    animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.7s backwards;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#resultsCount {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-weight: 600;
}

.sort-controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.sort-controls label {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sort-controls select {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
}

.sort-controls select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px var(--accent-cyan-glow);
}

/* ========== RESULTS GRID ========== */
.results-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Stagger product card animations */
.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.15s; }
.product-card:nth-child(3) { animation-delay: 0.2s; }
.product-card:nth-child(4) { animation-delay: 0.25s; }
.product-card:nth-child(5) { animation-delay: 0.3s; }
.product-card:nth-child(n+6) { animation-delay: 0.35s; }

.product-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(135deg, var(--accent-cyan), transparent 40%, transparent 60%, var(--accent-cyan));
    opacity: 0;
    transition: opacity 0.4s;
    z-index: -1;
}

.product-card:hover::before {
    opacity: 0.2;
}

.product-card:hover {
    transform: translateX(4px);
    border-color: var(--accent-cyan);
    box-shadow: -8px 8px 32px rgba(0, 217, 255, 0.15);
}

.product-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.product-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.product-model {
    font-family: var(--font-body);
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.product-specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.spec-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.spec-group-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.spec-label {
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.85rem;
}

.spec-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    color: var(--accent-cyan);
    text-decoration: none;
    border: 1px solid var(--accent-cyan);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.product-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-cyan);
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.product-link:hover::before {
    left: 0;
}

.product-link:hover {
    color: var(--bg-primary);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

/* ========== PAGINATION ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

#pageInfo {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 120px;
    text-align: center;
}

/* ========== LOADING & ERROR ========== */
.loading,
.error-message {
    text-align: center;
    padding: var(--spacing-xl);
    font-family: var(--font-mono);
    font-size: 1.1rem;
}

.loading {
    color: var(--accent-cyan);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.error-message {
    color: var(--accent-red);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: 4px;
    display: none;
}

.error-message.show {
    display: block;
    animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

/* ========== ANIMATIONS ========== */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .container {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2.5rem;
    }

    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .product-specs {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .search-box {
        flex-direction: column;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .sort-controls {
        flex-wrap: wrap;
    }

    .stat-value {
        font-size: 2.5rem;
    }
}

/* ========== SCROLLBAR STYLING ========== */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-accent);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}

/* ========== SELECTION ========== */
::selection {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}