/* --- CSS Variables & Design System --- */
:root {
    /* Color Palette - Premium Dark Theme */
    --bg-base: #09090b;
    --bg-surface: #18181b;
    --bg-surface-elevated: #27272a;
    
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --accent-primary: #8b5cf6;
    --accent-primary-hover: #7c3aed;
    --accent-secondary: #3b82f6;
    --accent-success: #10b981;
    --accent-success-bg: rgba(16, 185, 129, 0.1);
    --accent-danger: #ef4444;
    --accent-danger-bg: rgba(239, 68, 68, 0.1);
    --accent-warning: #f59e0b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    --gradient-glow: linear-gradient(90deg, rgba(139, 92, 246, 0.5) 0%, rgba(59, 130, 246, 0.5) 100%);
    
    /* Glassmorphism setup */
    --glass-bg: rgba(24, 24, 27, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
    
    /* Typography */
    --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;
    
    /* Spacing & Radii */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Resets & Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

/* --- Background Ornaments --- */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.bg-shape-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    left: -100px;
}

.bg-shape-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-secondary);
    bottom: 100px;
    right: -150px;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

/* --- Layout --- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* --- UI Components --- */

/* App Header */
.glass-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-icon {
    width: 28px;
    height: 28px;
    stroke: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Buttons */
.btn {
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(139, 92, 246, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(139, 92, 246, 0.5);
}

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

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

.btn-outline:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--text-muted);
}

.btn-icon {
    padding: 0.5rem 1rem;
}

/* Glass Panels */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
}

/* Hero Section */
.hero-section {
    padding: 5rem 0 3rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.gradient-text {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Search */
.search-container {
    width: 100%;
    max-width: 640px;
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-radius: var(--radius-full);
    position: relative;
    margin-top: 1rem;
    transition: border-color var(--transition-normal);
}

.search-container:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

.search-icon {
    color: var(--text-muted);
    margin: 0 1rem;
    width: 20px;
    height: 20px;
}

.search-container input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    font-family: inherit;
}

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

/* Search Results Dropdown */
.search-results {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    padding: 0.5rem;
    z-index: 50;
    max-height: 300px;
    overflow-y: auto;
    text-align: left;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-result-item:hover {
    background: var(--bg-surface-elevated);
}

.search-result-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--glass-border);
}

.search-result-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
}

.search-result-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Tags */
.quick-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 0.5rem;
}

.tag {
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
}

.tag:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
    background: var(--bg-surface-elevated);
}

.tag.active {
    color: white;
    background: var(--gradient-primary);
    border-color: transparent;
}


/* Product Grid (For Selection) */
.selection-area {
    padding: 3rem 0;
    animation: fadeIn var(--transition-normal);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card-mini {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.product-card-mini:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.1);
}

.product-card-mini::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.product-card-mini:hover::before {
    transform: scaleX(1);
}

.product-image-wrap {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.product-card-mini:hover img {
    transform: scale(1.05);
}

.product-card-mini h3 {
    font-size: 1.1rem;
}

.product-card-mini .brand {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}


/* Comparison View */
.comparison-view {
    padding: 2rem 0 5rem;
    animation: slideUp var(--transition-bounce);
}

.comparison-container {
    overflow: hidden;
    position: relative;
}

.compare-header {
    display: flex;
    align-items: stretch;
    padding: 2rem;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(24, 24, 27, 0.3);
}

.compare-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
    gap: 1rem;
}

.compare-card.base-product {
    border-right: 1px solid var(--glass-border);
    position: relative;
}

/* Highlight glow for base product */
.compare-card.base-product::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    box-shadow: inset 0 0 50px rgba(139, 92, 246, 0.05);
    z-index: 0;
}

.vs-badge {
    position: absolute;
    left: 50%;
    top: 2rem;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    box-shadow: 0 0 0 6px var(--bg-surface), 0 4px 10px rgba(0,0,0,0.5);
    z-index: 10;
}

.competitors-wrapper {
    flex: 1;
    display: flex;
    gap: 1rem;
}

.competitor-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
    gap: 1rem;
}

.competitor-col:not(:last-child) {
    border-right: 1px dashed var(--glass-border);
}


.compare-img {
    width: 140px;
    height: 140px;
    object-fit: contain;
    border-radius: var(--radius-md);
    background: white; /* Often product images need white bg if they are transparent */
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 1;
}

.compare-title {
    font-size: 1.25rem;
    font-weight: 700;
    z-index: 1;
}

.compare-brand {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 1;
}

.compare-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    z-index: 1;
}


/* Specs Table */
.specs-table-container {
    overflow-x: auto;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.specs-table th, .specs-table td {
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--glass-border);
    vertical-align: top;
}

.specs-table tr:last-child th, .specs-table tr:last-child td {
    border-bottom: none;
}

/* Category Headers */
.specs-table .category-row {
    background: rgba(255, 255, 255, 0.02);
}

.specs-table .category-row th {
    text-align: left;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 600;
    padding-top: 2rem;
    padding-bottom: 0.75rem;
}

/* Data Rows */
.specs-table tbody tr:not(.category-row):hover {
    background: rgba(255, 255, 255, 0.01);
}

.spec-label {
    width: 25%;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: right;
    padding-right: 2rem !important;
}

.spec-value {
    font-size: 1rem;
    text-align: center;
    position: relative;
}

.base-spec {
    border-right: 1px dashed var(--glass-border);
    background: rgba(139, 92, 246, 0.02); /* Slight tint for base column */
}

.comp-spec:not(:last-child) {
    border-right: 1px dashed var(--glass-border);
}

/* Winners/Losers Highlighting */
.spec-winner {
    color: var(--accent-success);
    font-weight: 600;
}
.spec-winner::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 2rem);
    height: calc(100% - 1rem);
    background: var(--accent-success-bg);
    border-radius: var(--radius-sm);
    z-index: -1;
}

.spec-loser {
    color: var(--text-muted);
}

/* Pros/Cons styling */
.pro-list, .con-list {
    list-style: none;
    text-align: left;
    display: inline-block;
}

.pro-item, .con-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.pro-icon { color: var(--accent-success); width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; }
.con-icon { color: var(--accent-danger); width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; }


/* Footer */
.glass-footer {
    border-top: 1px solid var(--glass-border);
    margin-top: 5rem;
    padding: 2rem 0;
    background: var(--bg-surface);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.5;
    font-weight: 700;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Responsive Variables */
@media (max-width: 992px) {
    .vs-badge { display: none; }
    .compare-card.base-product { border-right: none; border-bottom: 1px solid var(--glass-border); }
    
    .compare-header { flex-direction: column; }
    
    /* On smaller screens, comparisons need to scroll horizontally */
    .specs-table-container {
        padding-bottom: 1rem;
    }
}

@media (max-width: 768px) {
    .gradient-text { font-size: 2.5rem; }
    .nav-links { display: none; }
    
    .spec-label { width: 35%; text-align: left; padding-right: 1rem !important; }
}