/* ==========================================================================
   Pablo Diario — Modern Ultra-Legible Design System
   ========================================================================== */

:root {
    /* Light Theme (Default: Soft Cream / Warm Paper & Slate) */
    --bg-main: #faf9f6;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --bg-elevated: #e2e8f0;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #475569;
    
    --accent-primary: #0f172a;
    --accent-rose: #e11d48;
    --accent-blue: #2563eb;
    --accent-emerald: #10b981;

    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Newsreader', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    
    --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.04);
    --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.08);

    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-main: #0b0f19;
    --bg-surface: #161b26;
    --bg-surface-hover: #1e2536;
    --bg-elevated: #242c3f;
    
    --border-color: #242c3f;
    --border-hover: #3b4760;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #94a3b8;

    --accent-primary: #f8fafc;
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.6);
}

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

/* Accessibility Focus Visible */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.chip:focus-visible,
.article-card:focus-visible {
    outline: 2px solid var(--accent-rose);
    outline-offset: 2px;
}

/* Accessibility Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background-color: var(--text-primary);
    color: var(--bg-main);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 14px;
    z-index: 1000;
    text-decoration: none;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 16px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.hidden { display: none !important; }
.icon { width: 20px; height: 20px; max-width: 20px; max-height: 20px; stroke-width: 2; flex-shrink: 0; }

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

/* Reading Progress Bar */
.reading-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background-color: var(--accent-rose);
    z-index: 150;
    transition: width 0.1s ease;
}

/* Navbar Header */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(250, 249, 246, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background-color: rgba(11, 15, 25, 0.9);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-link {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.brand-tagline {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    background-color: var(--bg-elevated);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-contact-btn {
    background-color: var(--text-primary);
    color: var(--bg-main);
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-contact-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.icon-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.icon-btn:hover {
    border-color: var(--border-hover);
    background-color: var(--bg-surface-hover);
}

/* Hero Section */
.hero-editorial {
    padding: 48px 0 32px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 36px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-rose);
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(30px, 5.5vw + 8px, 44px);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    max-width: 880px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(15px, 2vw + 6px, 19px);
    color: var(--text-secondary);
    max-width: 760px;
    margin-bottom: 28px;
    line-height: 1.6;
    font-weight: 400;
}

/* Search and Filter Chips */
.filter-bar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.search-box {
    position: relative;
    max-width: 560px;
}

.search-icon {
    width: 18px !important;
    height: 18px !important;
    max-width: 18px !important;
    max-height: 18px !important;
    position: absolute !important;
    left: 14px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    color: var(--text-muted) !important;
    pointer-events: none;
    z-index: 2;
}

#search-input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: border-color var(--transition-normal);
}

#search-input:focus {
    border-color: var(--accent-rose);
}

.chips-container {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .chips-container {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 4px;
    }
    .chips-container::-webkit-scrollbar {
        display: none;
    }
    .chip {
        flex-shrink: 0;
        white-space: nowrap;
    }
}

.chip {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.chip:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.chip.active {
    background-color: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-main);
}

/* Editorial Layout (Main + Sidebar) */
.editorial-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 36px;
    margin-bottom: 80px;
}

@media (max-width: 960px) {
    .editorial-layout { grid-template-columns: 1fr; }
}

.feed-count-bar {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Articles List / Grid */
.articles-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.article-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

.card-meta-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.badge-cat {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-rose);
    background-color: rgba(225, 29, 72, 0.08);
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.article-date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
}

.card-title {
    font-family: 'Newsreader', Georgia, serif;
    font-size: clamp(20px, 3.5vw + 4px, 26px);
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.card-subtitle {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-excerpt {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 18px;
    max-width: 680px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
}

.read-btn-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

/* FULL PAGE ARTICLE READER STYLES (Expandable Page) */
.full-article-wrapper {
    max-width: 760px;
    margin: 40px auto 80px;
}

.back-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
    transition: all var(--transition-normal);
}

.back-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background-color: var(--bg-surface-hover);
}

.full-article {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    box-shadow: var(--shadow-hover);
}

@media (max-width: 768px) {
    .full-article { padding: 28px 20px; }
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 28px;
    margin-bottom: 36px;
}

.article-meta-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.article-page-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 5vw + 8px, 42px);
    font-weight: 700;
    line-height: 1.18;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.article-page-subtitle {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-top: 6px;
    margin-bottom: 16px;
}

.article-author-byline {
    display: flex;
    align-items: center;
    gap: 12px;
}

.byline-avatar {
    width: 44px;
    height: 44px;
    background-color: var(--accent-rose);
    color: #ffffff;
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.byline-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.byline-name {
    font-size: 14px;
    color: var(--text-primary);
}

.byline-readtime {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Article Signature Footer */
.article-footer-signature {
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.sig-card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.sig-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.sig-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

.sig-card a {
    color: var(--accent-rose);
    font-weight: 600;
    text-decoration: none;
}

/* Sidebar Widgets */
.feed-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.widget {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.widget-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.widget-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 6px;
}

.widget-author {
    text-align: center;
}

.author-avatar {
    width: 56px;
    height: 56px;
    background-color: var(--accent-rose);
    color: #ffffff;
    font-family: var(--font-serif);
    font-size: 26px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.author-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.author-bio {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.widget-text {
    font-size: 13px;
    color: var(--text-secondary);
}

.link-ai {
    display: inline-block;
    margin-top: 8px;
    color: var(--accent-blue);
    font-family: var(--font-mono);
    font-size: 13px;
    text-decoration: none;
}

/* Contact Section & Form Classes */
.contact-section {
    margin-top: 60px;
    margin-bottom: 60px;
}

.contact-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 36px;
    box-shadow: var(--shadow-card);
}

.contact-header {
    margin-bottom: 20px;
}

.badge-contact {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: #3b82f6;
    background-color: rgba(59, 130, 246, 0.15);
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.contact-title {
    font-family: var(--font-serif);
    font-size: clamp(22px, 4vw, 26px);
    font-weight: 600;
    margin-top: 8px;
    margin-bottom: 6px;
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 14px;
    max-width: 580px;
}

.form-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.contact-input {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 14px;
}

.contact-textarea {
    width: 100%;
    min-height: 110px;
    font-family: inherit;
    font-size: 14px;
    padding: 12px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    resize: vertical;
}

.contact-submit-btn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background-color: var(--text-primary);
    color: var(--bg-main);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity var(--transition-normal);
}

.contact-submit-btn:hover {
    opacity: 0.9;
}

.contact-success-msg {
    color: var(--accent-emerald);
    font-size: 13px;
    margin-top: 12px;
    text-align: center;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* Markdown Reading Body */
.markdown-body {
    font-family: var(--font-serif);
    font-size: 20px;
    line-height: 1.85;
    color: var(--text-primary);
}

.markdown-body p {
    margin-bottom: 24px;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    font-family: var(--font-sans);
    font-weight: 700;
    margin-top: 36px;
    margin-bottom: 16px;
}

.markdown-body blockquote {
    border-left: 3px solid var(--accent-rose);
    padding-left: 20px;
    margin: 28px 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* Responsive YouTube Video Container */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 24px 0;
    background-color: #000000;
    box-shadow: var(--shadow-card);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Responsive Markdown Images */
.responsive-img, .markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 20px 0;
    display: block;
    box-shadow: var(--shadow-card);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    background-color: var(--bg-surface);
    margin-top: auto;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-left h3 {
    font-size: 18px;
    font-weight: 800;
}

.footer-left p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-family: var(--font-mono);
    margin-left: 16px;
}

.footer-links a:hover { color: var(--accent-rose); }

.footer-secret-link {
    font-family: var(--font-mono);
    opacity: 0.6;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
}

/* Secret Beacon Micro-Interactions */
.secret-beacon {
    position: relative;
    opacity: 0.7;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.secret-beacon:hover {
    opacity: 1 !important;
    color: var(--accent-rose) !important;
    text-shadow: 0 0 12px rgba(225, 29, 72, 0.35);
}

.secret-beacon::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: var(--accent-rose);
    border-radius: 50%;
    margin-left: 6px;
    opacity: 0.4;
    animation: beaconPulse 2.5s infinite ease-in-out;
}

@keyframes beaconPulse {
    0%, 100% { transform: scale(0.9); opacity: 0.3; }
    50% { transform: scale(1.4); opacity: 0.9; box-shadow: 0 0 8px var(--accent-rose); }
}

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

/* Mobile Navbar Responsiveness */
@media (max-width: 480px) {
    .nav-container {
        padding: 12px 16px;
    }
    .brand-title {
        font-size: 18px;
    }
    .nav-contact-btn span {
        display: none;
    }
    .nav-contact-btn {
        padding: 8px 10px;
    }
    .nav-links {
        gap: 4px;
    }
    .contact-card {
        padding: 20px;
    }
}

@media (max-width: 400px) {
    .secret-beacon {
        font-size: 0.75rem;
    }
    .nav-container {
        padding: 10px 12px;
    }
}