:root {
    /* Color Palette - Premium Automotive Dark Mode */
    --bg-primary: #0A0A0C;
    --bg-secondary: #121215;
    --bg-tertiary: #1C1C21;
    --accent-primary: #E53935; /* Ferrazzi Red */
    --accent-hover: #F44336;
    --accent-glow: rgba(229, 57, 53, 0.4);
    
    --text-primary: #FFFFFF;
    --text-secondary: #9E9E9E;
    --text-tertiary: #757575;
    
    --border-light: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(229, 57, 53, 0.5);
    
    --card-bg: rgba(28, 28, 33, 0.6);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(229, 57, 53, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
    background-attachment: fixed;
}

.app-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    margin-bottom: 3rem;
    position: relative;
    z-index: 10;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: var(--card-bg);
    padding: 1.5rem 3rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}

.logo {
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.separator {
    width: 2px;
    height: 40px;
    background: var(--border-light);
}

.title-container h1 {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #FFF 0%, #AAA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.title-container p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
}

/* Search Section */
.search-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
    max-width: 900px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.search-box {
    position: relative;
    width: 100%;
    transition: transform var(--transition-fast);
}

.search-box:focus-within {
    transform: translateY(-2px);
}

.search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.search-box:focus-within .search-icon {
    color: var(--accent-primary);
}

#searchInput {
    width: 100%;
    padding: 1.2rem 1.5rem 1.2rem 4rem;
    font-family: var(--font-body);
    font-size: 1.2rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    outline: none;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

#searchInput:focus {
    border-color: var(--border-focus);
    background: var(--bg-tertiary);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2), 0 0 0 4px var(--accent-glow);
}

#searchInput::placeholder {
    color: var(--text-tertiary);
}

.code-filter-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

#codeFilterInput {
    padding-right: 2.5rem;
    background-image: none; /* Override arrow */
}

#codeFilterInput::placeholder {
    color: var(--text-tertiary);
}

.clear-btn {
    position: absolute;
    right: 0.8rem;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.2rem;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.clear-btn:hover {
    color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.1);
}

.filters {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-select {
    appearance: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    padding: 0.8rem 2.5rem 0.8rem 1.2rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%239E9E9E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    background-size: 1.2em;
}

.filter-select:hover, .filter-select:focus {
    border-color: var(--border-focus);
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

/* Loading & Info States */
.loading-state, .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    gap: 1rem;
}

.hidden {
    display: none !important;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.results-info {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

#resultsCount {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Catalog Grid */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    flex: 1;
}

/* Product Card */
.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.4s ease-out forwards;
    opacity: 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow);
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(35, 35, 41, 0.8);
}

.product-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 1rem;
}

.brand-badge {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.model-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.5rem;
    line-height: 1.3;
}

.motor-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.year-badge {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.parts-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.part-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    transition: background var(--transition-fast);
}

.part-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.part-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.part-code {
    color: var(--accent-primary);
    font-family: monospace;
    font-size: 0.95rem;
    font-weight: 600;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-light);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .logo-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .separator {
        width: 40px;
        height: 2px;
    }
    
    .title-container h1 {
        font-size: 2rem;
    }
    
    .catalog-grid {
        grid-template-columns: 1fr;
    }
}