/**
 * Lux4Rides Blog - Premium CSS
 * Luxury, minimal, high-end design system
 */

/* ========================================
   CSS VARIABLES & ROOT STYLES
======================================== */
:root {
    /* Colors - Luxury Palette */
    --color-black: #0a0a0a;
    --color-dark: #1a1a1a;
    --color-charcoal: #2d2d2d;
    --color-gray-dark: #404040;
    --color-gray: #6b6b6b;
    --color-gray-light: #9a9a9a;
    --color-silver: #c4c4c4;
    --color-off-white: #f5f5f5;
    --color-white: #ffffff;
    
    /* Accent Colors */
    --color-gold: #c9a962;
    --color-gold-dark: #a88b4a;
    --color-gold-light: #dfc88a;
    
    /* Semantic Colors */
    --color-success: #2ecc71;
    --color-warning: #f39c12;
    --color-error: #e74c3c;
    --color-info: #3498db;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Layout */
    --container-max: 1400px;
    --container-content: 800px;
    --header-height: 80px;
    
    /* Borders & Shadows */
    --border-radius-sm: 4px;
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ========================================
   RESET & BASE STYLES
======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-charcoal);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   TYPOGRAPHY
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-black);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--space-md);
}

.text-gold { color: var(--color-gold); }
.text-gray { color: var(--color-gray); }
.text-light { color: var(--color-gray-light); }

/* ========================================
   LAYOUT COMPONENTS
======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: var(--container-content);
}

.section {
    padding: var(--space-4xl) 0;
}

/* ========================================
   HEADER & NAVIGATION
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 1000;
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

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

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-black);
    letter-spacing: -0.02em;
}

.logo-text span {
    color: var(--color-gold);
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-black);
}

.nav-cta {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-black);
    color: var(--color-white);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-charcoal);
    color: var(--color-white);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-black);
    transition: all var(--transition-fast);
}

/* ========================================
   HERO SECTION
======================================== */
.hero {
    padding-top: calc(var(--header-height) + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    background: linear-gradient(135deg, var(--color-off-white) 0%, var(--color-white) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-black);
    color: var(--color-gold);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 50px;
    margin-bottom: var(--space-lg);
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* ========================================
   ARTICLE CARDS
======================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.article-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.article-card-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-off-white);
}

.article-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article-card:hover .article-card-image img {
    transform: scale(1.05);
}

.article-card-category {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-black);
    color: var(--color-gold);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--border-radius-sm);
}

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

.article-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.article-card-title a:hover {
    color: var(--color-gold-dark);
}

.article-card-excerpt {
    font-size: 0.95rem;
    color: var(--color-gray);
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.8rem;
    color: var(--color-gray-light);
}

.article-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Featured Article Card */
.article-card-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.article-card-featured .article-card-image {
    aspect-ratio: auto;
    min-height: 400px;
}

.article-card-featured .article-card-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-2xl);
}

.article-card-featured .article-card-title {
    font-size: 2rem;
}

/* ========================================
   ARTICLE SINGLE PAGE
======================================== */
.article-single {
    padding-top: calc(var(--header-height) + var(--space-2xl));
}

.article-header {
    max-width: 900px;
    margin: 0 auto var(--space-2xl);
    text-align: center;
}

.article-header-category {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-black);
    color: var(--color-gold);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 50px;
    margin-bottom: var(--space-lg);
}

.article-title {
    margin-bottom: var(--space-lg);
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    font-size: 0.9rem;
    color: var(--color-gray);
}

.article-meta-divider {
    width: 4px;
    height: 4px;
    background: var(--color-silver);
    border-radius: 50%;
}

.article-featured-image {
    max-width: 1100px;
    margin: 0 auto var(--space-2xl);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.article-featured-image img {
    width: 100%;
    aspect-ratio: 21/9;
    object-fit: cover;
}

.article-content {
    max-width: var(--container-content);
    margin: 0 auto;
}

.article-content h2 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.article-content h3 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.article-content p {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content img {
    border-radius: var(--border-radius);
    margin: var(--space-xl) 0;
}

.article-content blockquote {
    border-left: 4px solid var(--color-gold);
    padding-left: var(--space-lg);
    margin: var(--space-xl) 0;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-gray-dark);
}

.article-content ul,
.article-content ol {
    margin: var(--space-lg) 0;
    padding-left: var(--space-lg);
}

.article-content li {
    margin-bottom: var(--space-sm);
    position: relative;
}

.article-content ul li::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 0.65rem;
    width: 5px;
    height: 5px;
    background: var(--color-gold);
    border-radius: 50%;
}

.article-content ol {
    list-style: decimal;
}

.article-content a {
    color: var(--color-gold-dark);
    border-bottom: 1px solid var(--color-gold-light);
}

.article-content a:hover {
    border-bottom-color: var(--color-gold-dark);
}

/* Article Tags */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-off-white);
}

.article-tag {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-off-white);
    color: var(--color-gray);
    font-size: 0.8rem;
    border-radius: 50px;
    transition: all var(--transition-fast);
}

.article-tag:hover {
    background: var(--color-black);
    color: var(--color-white);
}

/* ========================================
   COMMENTS SECTION
======================================== */
.comments-section {
    max-width: var(--container-content);
    margin: var(--space-3xl) auto 0;
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-off-white);
}

.comments-title {
    margin-bottom: var(--space-xl);
}

.comment {
    padding: var(--space-lg);
    background: var(--color-off-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-md);
}

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

.comment-author {
    font-weight: 600;
    color: var(--color-black);
}

.comment-date {
    font-size: 0.8rem;
    color: var(--color-gray-light);
}

.comment-content {
    color: var(--color-charcoal);
    line-height: 1.6;
}

/* Comment Form */
.comment-form {
    margin-top: var(--space-xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-charcoal);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-silver);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-gold);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   BUTTONS
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-black);
    color: var(--color-white);
    border: 2px solid var(--color-black);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-black);
}

.btn-secondary {
    background: transparent;
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

.btn-secondary:hover {
    background: var(--color-black);
    color: var(--color-white);
}

.btn-gold {
    background: var(--color-gold);
    color: var(--color-black);
    border: 2px solid var(--color-gold);
}

.btn-gold:hover {
    background: var(--color-gold-dark);
    border-color: var(--color-gold-dark);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1rem;
}

/* ========================================
   PAGINATION
======================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-3xl);
}

.pagination-item {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-silver);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray);
    transition: all var(--transition-fast);
}

.pagination-item:hover,
.pagination-item.active {
    background: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   FOOTER
======================================== */
.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-4xl);
}

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

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-logo span {
    color: var(--color-gold);
}

.footer-desc {
    color: var(--color-gray);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
    color: var(--color-gold);
}

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

.footer-link {
    color: var(--color-gray);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-copyright {
    color: var(--color-gray);
    font-size: 0.85rem;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-charcoal);
    border-radius: 50%;
    color: var(--color-gray);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

/* ========================================
   CATEGORY FILTER
======================================== */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
}

.category-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    color: var(--color-gray);
    border: 1px solid var(--color-silver);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.category-btn:hover,
.category-btn.active {
    background: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
}

/* ========================================
   SEARCH BAR
======================================== */
.search-bar {
    position: relative;
    max-width: 400px;
    margin: 0 auto var(--space-2xl);
}

.search-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-right: 50px;
    border: 1px solid var(--color-silver);
    border-radius: 50px;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-gold);
}

.search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: background var(--transition-fast);
}

.search-btn:hover {
    background: var(--color-charcoal);
}

/* ========================================
   LOADING STATES
======================================== */
.skeleton {
    background: linear-gradient(90deg, var(--color-off-white) 25%, var(--color-silver) 50%, var(--color-off-white) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--border-radius);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

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

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

/* ========================================
   ALERTS & NOTIFICATIONS
======================================== */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-md);
    font-size: 0.9rem;
}

.alert-success {
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    border: 1px solid var(--color-warning);
    color: var(--color-warning);
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    border: 1px solid var(--color-info);
    color: var(--color-info);
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .article-card-featured {
        grid-template-columns: 1fr;
    }
    
    .article-card-featured .article-card-image {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .article-meta-divider {
        display: none;
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .article-card-content {
        padding: var(--space-md);
    }
    
    .btn {
        padding: var(--space-sm) var(--space-lg);
    }
}

/* ========================================
   UTILITIES
======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-lg); }
.mt-3 { margin-top: var(--space-xl); }
.mt-4 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-lg); }
.mb-3 { margin-bottom: var(--space-xl); }
.mb-4 { margin-bottom: var(--space-2xl); }

.d-flex { display: flex; }
.flex-center { 
    display: flex;
    align-items: center;
    justify-content: center;
}
.gap-1 { gap: var(--space-md); }
.gap-2 { gap: var(--space-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }