/* 
   UX DESIGNER SYSTEM: Rommark Premium Design System (RPDS) v1.0
   Based on UX Pro Max & Google Design Principles
*/

:root {
    /* 1. Refined Color Palette (Enhanced for WCAG AA) */
    --premium-blue: #2563EB;        /* Primary (Luminance balanced) */
    --premium-blue-hover: #1D4ED8;
    --premium-bg: #FFFFFF;
    --premium-surface: #F8FAFC;     /* Slate 50 */
    --premium-border: #E2E8F0;      /* Slate 200 */
    
    /* Text Hierarchy (Contrast Checked for WCAG AA) */
    --text-primary: #0F172A;       /* Slate 900 (High Contrast) */
    --text-secondary: #1E293B;     /* Slate 800 */
    --text-tertiary: #475569;      /* Slate 600 (WCAG AA compliant) */
    --text-muted: #334155;         /* Slate 700 (WCAG AA compliant) */

    /* 2. Typography System */
    --font-primary: 'Google Sans', 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;
    
    /* Leading & Tracking */
    --ls-tight: -0.025em;
    --ls-normal: 0;
    --lh-body: 1.75;
    --lh-heading: 1.2;

    /* 3. Spacing & Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 40px;
    
    /* 4. Motion & Effects */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --premium-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --premium-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

/* 5. Core Layout & Typography Resets */
body {
    background-color: var(--premium-bg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    line-height: var(--lh-body);
    -webkit-font-smoothing: antialiased;
}

/* Enhanced Readability for Article Content */
.v2-content {
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.125rem; /* 18px for optimal reading */
    color: var(--text-secondary);
}

.v2-content p {
    margin-bottom: 2rem;
}

.v2-content h2, .v2-content h3 {
    color: var(--text-primary);
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: var(--ls-tight);
}

/* 6. Premium Components (UX Pro Max) */

/* Glassmorphism Hero Update */
.immersive-hero {
    background: linear-gradient(135deg, #F1F5F9 0%, #F8FAFC 100%) !important;
    border: 1px solid var(--premium-border) !important;
    box-shadow: var(--premium-shadow) !important;
}

.hero-category {
    background: rgba(37, 99, 235, 0.1);
    color: var(--premium-blue);
    padding: 6px 14px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 7. Icon Replacement (Semantic) */
.hero-date::before, .post-card__meta time::before {
    content: '🗓️';
    margin-right: 8px;
    filter: grayscale(1);
    opacity: 0.7;
}

.hero-read-time::before, .post-card__meta span::before {
    content: '⏱️';
    margin-right: 8px;
    filter: grayscale(1);
    opacity: 0.7;
}

/* 8. Accessibility Enhancements */
a:focus-visible {
    outline: 2px solid var(--premium-blue);
    outline-offset: 4px;
    border-radius: 4px;
}

/* 9. Visual Feedback & Micro-interactions */
.post-card {
    transition: transform 0.4s var(--ease-out-expo), box-shadow 0.4s var(--ease-out-expo) !important;
}

.post-card:hover {
    transform: translateY(-8px) !important;
    box-shadow: var(--premium-shadow-hover) !important;
}

/* 10. Article Page Premium Layout (single.php) */
.article-page {
    overflow-x: hidden;
}

.article-hero {
    position: relative;
    padding: 120px 0 80px;
    background: var(--premium-surface);
    border-bottom: 1px solid var(--premium-border);
}

.article-hero__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.article-hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: var(--lh-heading);
    letter-spacing: var(--ls-tight);
    margin-bottom: 24px;
    color: var(--text-primary);
}

.article-hero__excerpt {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.article-hero__tags {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.article-tag {
    background: rgba(37, 99, 235, 0.08);
    color: var(--premium-blue);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.article-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.article-author__avatar img {
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: var(--premium-shadow);
}

.article-author__name {
    display: block;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.article-meta-info {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.meta-icon {
    opacity: 0.8;
}

.article-hero__image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--premium-shadow-hover);
}

.article-hero__image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s var(--ease-out-expo);
}

.article-hero__image:hover {
    transform: scale(1.02);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.5;
}

.scroll-indicator__mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
}

.scroll-indicator__wheel {
    width: 2px;
    height: 6px;
    background: var(--text-muted);
    margin-top: 8px;
    border-radius: 1px;
    animation: scroll-wheel 1.5s infinite;
}

@keyframes scroll-wheel {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(15px); opacity: 0; }
}

/* Article Body Container */
.v2-article-container {
    display: grid;
    grid-template-columns: 120px 1fr 120px;
    gap: 40px;
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 24px;
}

.v2-sidebar-left {
    position: relative;
}

.v2-social-sticky {
    position: sticky;
    top: 120px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.v2-social-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--premium-border);
    background: white;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.v2-social-btn:hover {
    background: var(--premium-surface);
    color: var(--premium-blue);
    border-color: var(--premium-blue);
    transform: scale(1.1);
}

/* Related Stories Section */
.related-stories-section {
    padding: 100px 0;
    background: var(--premium-surface);
    border-top: 1px solid var(--premium-border);
}

.related-stories-title {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: var(--ls-tight);
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 32px;
}

/* 11. Responsive Design (Mobile-First Optimization) */
@media (max-width: 1024px) {
    .article-hero__inner {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .article-hero__tags {
        justify-content: center;
    }

    .article-hero__title {
        font-size: 2.75rem;
    }

    .article-hero__image-wrapper {
        max-width: 600px;
        margin: 0 auto;
    }

    .v2-article-container {
        grid-template-columns: 1fr;
    }

    .v2-sidebar-left, .v2-sidebar-right {
        display: none;
    }

    .article-author {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .article-hero {
        padding: 80px 0 60px;
    }

    .article-hero__title {
        font-size: 2.25rem;
    }

    .article-hero__excerpt {
        font-size: 1.125rem;
    }

    .v2-content {
        font-size: 1.0625rem;
    }

    .related-stories-section {
        padding: 60px 0;
    }
}