/* LoomStack — Main Stylesheet
   Clean, modern, Linear/Vercel-inspired design
*/

:root {
    /* Colors */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-card: #16161a;
    --bg-hover: #1c1c21;
    
    --text-primary: #f0f0f2;
    --text-secondary: #a0a0ab;
    --text-muted: #6b6b76;
    
    --accent: #7c5cfc;
    --accent-light: #9b7eff;
    --accent-dark: #5a3de6;
    
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    
    --border: #2a2a32;
    --border-light: #3a3a44;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #7c5cfc 0%, #3b82f6 50%, #06b6d4 100%);
    --gradient-card: linear-gradient(180deg, rgba(124, 92, 252, 0.05) 0%, transparent 100%);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(124, 92, 252, 0.15);
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 0.938rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.85rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
}

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

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    color: var(--accent);
    font-size: 1.4rem;
}

.logo-text {
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav a {
    color: var(--text-secondary);
    font-size: 0.938rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: var(--space-3xl) 0 var(--space-3xl);
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(124, 92, 252, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.hero-actions .btn {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
    max-width: 500px;
    margin: 0 auto;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-light);
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Section Headers */
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.view-all {
    color: var(--accent);
    font-size: 0.938rem;
    font-weight: 500;
}

.view-all:hover {
    color: var(--accent-light);
}

/* Featured Section */
.featured {
    padding: var(--space-2xl) 0;
}

.cards-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--space-lg);
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.25s ease;
}

.card:hover {
    border-color: var(--border-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.featured-card.large {
    grid-row: span 1;
}

.featured-card .card-image-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-muted);
}

.featured-card.large .card-image-placeholder {
    aspect-ratio: 21/9;
}

.card-category {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-light);
    background: rgba(124, 92, 252, 0.1);
    margin: var(--space-md) var(--space-md) var(--space-sm);
    border-radius: 999px;
}

.card-content {
    padding: var(--space-md) var(--space-lg) var(--space-lg);
}

.card-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.4;
    margin: var(--space-sm) 0;
}

.featured-card.large .card-title {
    font-size: 1.35rem;
}

.card-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.read-more {
    display: inline-block;
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
}

.read-more:hover {
    color: var(--accent-light);
}

/* Categories Grid */
.tools {
    padding: var(--space-2xl) 0;
}

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

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.25s ease;
}

.category-card:hover {
    border-color: var(--accent);
    background: var(--gradient-card);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.category-icon {
    font-size: 2.25rem;
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.category-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.category-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Comparisons Section */
.comparisons {
    padding: var(--space-2xl) 0;
}

.comparison-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.comparison-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.comparison-item:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.comparison-rank {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    min-width: 3rem;
    text-align: center;
}

.comparison-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.comparison-info p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.comparison-arrow {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: transform 0.2s, color 0.2s;
}

.comparison-item:hover .comparison-arrow {
    transform: translateX(4px);
    color: var(--accent);
}

/* Newsletter */
.newsletter {
    padding: var(--space-3xl) 0;
}

.newsletter-content {
    text-align: center;
    max-width: 550px;
    margin: 0 auto;
}

.newsletter h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.newsletter p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
    max-width: 420px;
    margin: 0 auto var(--space-md);
}

.newsletter-form input[type="email"] {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.938rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border-color 0.2s;
}

.newsletter-form input[type="email"]:focus {
    border-color: var(--accent);
}

.newsletter-form input[type="email"]::placeholder {
    color: var(--text-muted);
}

.newsletter-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-brand .logo-icon,
.footer-brand .logo-text {
    display: inline;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: var(--space-sm);
}

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 0.3rem 0;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .featured-card.large {
        grid-column: span 2;
    }
    
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-card.large {
        grid-column: span 1;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}