/* ============================================================
   SKIN DECODED — Ghost Theme
   Clean, editorial, science-forward skincare blog
   ============================================================ */

/* --- Variables --- */
:root {
    --color-bg: #FDFBF5;
    --color-bg-alt: #F3EDE2;
    --color-text: #1a1a1a;
    --color-text-light: #5a5a52;
    --color-text-muted: #9a9a8e;
    --color-accent: #2D6A4F;
    --color-accent-light: #52B788;
    --color-accent-pale: #D8F3DC;
    --color-dark: #1A2E1F;
    --color-white: #ffffff;
    --color-border: #E5DDD0;
    --font-serif: 'DM Serif Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'DM Mono', 'Courier New', monospace;
    --container: 1200px;
    --container-narrow: 740px;
    --radius: 12px;
    --radius-sm: 6px;
    --shadow: 0 2px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 40px rgba(0,0,0,0.14);
    --transition: 0.2s ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { background: var(--color-bg); color: var(--color-text); font-family: var(--font-sans); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-light); }
ul { list-style: none; }

/* --- Container --- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(250,250,248,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
}
.site-logo { display: flex; align-items: center; }
.logo-text {
    font-family: var(--font-serif); font-size: 22px;
    color: var(--color-dark); letter-spacing: -0.02em;
}
.site-logo img { height: 36px; width: auto; }

.site-nav { display: flex; align-items: center; gap: 8px; }
.site-nav .nav,
.nav-list {
    display: flex; align-items: center; gap: 4px;
    margin: 0; padding: 0; list-style: none;
}
.site-nav .nav a,
.nav-list a {
    font-size: 14px; font-weight: 500; color: var(--color-text);
    padding: 6px 12px; border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
}
.site-nav .nav a:hover,
.nav-list a:hover {
    background: var(--color-accent-pale); color: var(--color-accent);
}

.btn-subscribe {
    font-size: 14px; font-weight: 600;
    background: var(--color-accent); color: var(--color-white) !important;
    padding: 8px 20px; border-radius: 100px;
    margin-left: 8px;
    transition: background var(--transition), transform var(--transition);
}
.btn-subscribe:hover { background: var(--color-accent-light); transform: translateY(-1px); }

.nav-toggle {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; }

/* ============================================================
   HERO
   ============================================================ */
.hero-banner {
    position: relative; min-height: 500px;
    display: flex; align-items: center;
    background-size: cover; background-position: center;
}
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(17,17,17,0.85) 0%, rgba(107,63,160,0.6) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 660px; padding: 80px 0; }

.hero-simple {
    background: var(--color-dark);
    padding: 80px 0;
}
.hero-simple .container { max-width: 660px; }

.hero-eyebrow {
    font-family: var(--font-mono); font-size: 12px; font-weight: 500;
    color: var(--color-accent-pale); letter-spacing: 0.12em; text-transform: uppercase;
    margin-bottom: 16px;
}
.hero-title {
    font-family: var(--font-serif); font-size: clamp(40px, 6vw, 64px);
    color: var(--color-white); line-height: 1.1; letter-spacing: -0.03em;
    margin-bottom: 20px;
}
.hero-desc { font-size: 18px; color: rgba(255,255,255,0.8); line-height: 1.6; margin-bottom: 32px; }
.btn-hero {
    display: inline-block; font-size: 15px; font-weight: 600;
    background: var(--color-accent); color: var(--color-white);
    padding: 14px 32px; border-radius: 100px;
    transition: background var(--transition), transform var(--transition);
}
.btn-hero:hover { background: var(--color-accent-light); color: white; transform: translateY(-2px); }

/* ============================================================
   POSTS SECTION
   ============================================================ */
.posts-section { padding: 80px 0; }

/* Featured Post */
.post-featured {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
    align-items: center; margin-bottom: 80px;
    background: var(--color-white); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
}
.featured-image-wrap { position: relative; overflow: hidden; aspect-ratio: 4/3; display: block; }
.featured-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.featured-image-wrap:hover img { transform: scale(1.03); }
.featured-badge {
    position: absolute; top: 16px; left: 16px;
    background: var(--color-accent); color: white;
    font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
    padding: 4px 12px; border-radius: 100px;
}
.featured-content { padding: 48px 48px 48px 0; }
.featured-title { font-family: var(--font-serif); font-size: clamp(26px, 3vw, 36px); line-height: 1.2; letter-spacing: -0.02em; margin: 12px 0 16px; }
.featured-title a { color: var(--color-dark); }
.featured-title a:hover { color: var(--color-accent); }
.featured-excerpt { font-size: 16px; color: var(--color-text-light); line-height: 1.7; margin-bottom: 24px; }

/* Section header */
.section-header { display: flex; align-items: center; gap: 20px; margin-bottom: 40px; }
.section-title { font-family: var(--font-serif); font-size: 28px; letter-spacing: -0.02em; white-space: nowrap; }
.section-line { flex: 1; height: 1px; background: var(--color-border); }

/* Posts Grid */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.posts-grid--3 { grid-template-columns: repeat(3, 1fr); }

.post-card {
    background: var(--color-white); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

.post-card-image-wrap { display: block; overflow: hidden; aspect-ratio: 16/9; }
.post-card-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.post-card:hover .post-card-image-wrap img { transform: scale(1.04); }

.post-card-content { padding: 24px; }
.post-card-title { font-family: var(--font-serif); font-size: 20px; line-height: 1.3; letter-spacing: -0.01em; margin: 8px 0 10px; }
.post-card-title a { color: var(--color-dark); }
.post-card-title a:hover { color: var(--color-accent); }
.post-card-excerpt { font-size: 14px; color: var(--color-text-light); line-height: 1.6; margin-bottom: 16px; }
.post-card-meta { font-size: 13px; color: var(--color-text-muted); }

/* Tags */
.post-tag {
    display: inline-block; font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--color-accent); background: var(--color-accent-pale);
    padding: 3px 10px; border-radius: 100px;
}
.post-tag:hover { background: var(--color-accent); color: white; }

/* Post meta */
.post-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--color-text-muted); }
.author-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.author-name { font-weight: 500; color: var(--color-text); }
.meta-sep { color: var(--color-border); }

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 60px; }
.pagination a, .pagination .page-number {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500;
    border: 1px solid var(--color-border); color: var(--color-text);
    transition: all var(--transition);
}
.pagination a:hover, .pagination .page-number.current {
    background: var(--color-accent); color: white; border-color: var(--color-accent);
}

/* ============================================================
   NEWSLETTER
   ============================================================ */
.newsletter-section { padding: 80px 0; background: var(--color-bg-alt); }
.newsletter-box {
    max-width: 620px; margin: 0 auto; text-align: center;
    background: var(--color-white); padding: 60px 48px;
    border-radius: var(--radius); box-shadow: var(--shadow);
    border-top: 4px solid var(--color-accent);
}
.newsletter-eyebrow {
    font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--color-accent); margin-bottom: 12px;
}
.newsletter-title { font-family: var(--font-serif); font-size: 32px; letter-spacing: -0.02em; margin-bottom: 16px; }
.newsletter-desc { font-size: 16px; color: var(--color-text-light); line-height: 1.7; margin-bottom: 32px; }
.newsletter-form, .subscribe-cta-form {
    display: flex; gap: 8px; max-width: 420px; margin: 0 auto;
}
.newsletter-form input, .subscribe-cta-form input {
    flex: 1; padding: 12px 16px;
    border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
    font-size: 15px; font-family: var(--font-sans);
    background: var(--color-bg); color: var(--color-text);
    transition: border-color var(--transition);
}
.newsletter-form input:focus, .subscribe-cta-form input:focus {
    outline: none; border-color: var(--color-accent);
}
.newsletter-form button, .subscribe-cta-form button {
    padding: 12px 24px; background: var(--color-accent); color: white;
    border: none; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 600; font-family: var(--font-sans);
    cursor: pointer; transition: background var(--transition);
    white-space: nowrap;
}
.newsletter-form button:hover, .subscribe-cta-form button:hover { background: var(--color-accent-light); }
.already-subscribed { font-size: 16px; color: var(--color-accent); font-weight: 500; }

/* ============================================================
   SINGLE POST
   ============================================================ */
.post-header { padding: 64px 0 48px; background: var(--color-dark); color: white; }
.post-header-inner { max-width: 800px; }
.post-title { font-family: var(--font-serif); font-size: clamp(32px, 5vw, 52px); line-height: 1.1; letter-spacing: -0.03em; color: white; margin: 16px 0 24px; }
.post-subtitle { font-size: 20px; color: rgba(255,255,255,0.75); line-height: 1.6; margin-bottom: 32px; }
.post-header .post-meta { color: rgba(255,255,255,0.7); }
.post-header .author-avatar { width: 44px; height: 44px; border: 2px solid rgba(255,255,255,0.3); }
.post-header .author-name { color: rgba(255,255,255,0.9); }
.post-meta-text { display: flex; flex-direction: column; gap: 2px; }
.post-meta-details { font-size: 13px; color: rgba(255,255,255,0.5); }
.post-header .meta-sep { color: rgba(255,255,255,0.3); }

.post-feature-image { padding: 0; margin-top: -1px; }
.post-feature-image figure { position: relative; }
.post-feature-image img { width: 100%; max-height: 560px; object-fit: cover; }
.post-feature-image figcaption { font-size: 13px; color: var(--color-text-muted); text-align: center; padding: 10px 0; font-style: italic; }

/* Post body layout */
.post-body { padding: 60px 0 80px; }
.post-content-wrap { display: grid; grid-template-columns: 200px 1fr; gap: 60px; max-width: 1000px; margin: 0 auto; }

/* Sidebar */
.post-sidebar { position: sticky; top: 88px; align-self: start; }
.toc-wrap, .share-wrap { margin-bottom: 32px; }
.toc-title, .share-title {
    font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--color-text-muted); margin-bottom: 12px;
}
#toc a { display: block; font-size: 13px; color: var(--color-text-light); padding: 4px 0; border-left: 2px solid var(--color-border); padding-left: 12px; transition: all var(--transition); }
#toc a:hover, #toc a.active { color: var(--color-accent); border-left-color: var(--color-accent); }
.share-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    border: 1.5px solid var(--color-border); color: var(--color-text-light);
    margin-right: 8px; transition: all var(--transition);
}
.share-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Post content typography */
.gh-content { font-size: 18px; line-height: 1.8; color: var(--color-text); }
.gh-content h2 { font-family: var(--font-serif); font-size: 32px; letter-spacing: -0.02em; line-height: 1.2; margin: 48px 0 20px; color: var(--color-dark); }
.gh-content h3 { font-family: var(--font-serif); font-size: 24px; letter-spacing: -0.01em; line-height: 1.3; margin: 36px 0 16px; color: var(--color-dark); }
.gh-content h4 { font-size: 18px; font-weight: 600; margin: 28px 0 12px; }
.gh-content p { margin-bottom: 24px; }
.gh-content a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.gh-content a:hover { color: var(--color-accent-light); }
.gh-content ul, .gh-content ol { margin: 0 0 24px 24px; }
.gh-content li { margin-bottom: 8px; }
.gh-content blockquote {
    border-left: 4px solid var(--color-accent);
    margin: 32px 0; padding: 16px 24px;
    background: var(--color-accent-pale);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 19px; font-style: italic; color: var(--color-text);
}
.gh-content code { font-family: var(--font-mono); font-size: 15px; background: var(--color-bg-alt); padding: 2px 6px; border-radius: 4px; color: var(--color-accent); }
.gh-content pre { background: var(--color-dark); padding: 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 24px 0; }
.gh-content pre code { background: none; color: #e2e8f0; padding: 0; }
.gh-content figure { margin: 32px 0; }
.gh-content figure img { border-radius: var(--radius-sm); }
.gh-content figcaption { font-size: 13px; color: var(--color-text-muted); text-align: center; margin-top: 10px; font-style: italic; }
.gh-content hr { border: none; height: 1px; background: var(--color-border); margin: 48px 0; }
.gh-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.gh-content th { background: var(--color-bg-alt); padding: 10px 16px; text-align: left; font-weight: 600; border-bottom: 2px solid var(--color-border); }
.gh-content td { padding: 10px 16px; border-bottom: 1px solid var(--color-border); }
.gh-content tr:hover td { background: var(--color-bg-alt); }

/* Post footer */
.post-footer { padding: 60px 0; border-top: 1px solid var(--color-border); }
.post-tags-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 48px; }
.tag-pill {
    font-size: 13px; padding: 6px 14px; border-radius: 100px;
    border: 1.5px solid var(--color-border); color: var(--color-text-light);
    transition: all var(--transition);
}
.tag-pill:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Author box */
.author-box { background: var(--color-bg-alt); border-radius: var(--radius); padding: 32px; margin-bottom: 48px; }
.author-box-inner { display: flex; gap: 24px; align-items: flex-start; }
.author-box-avatar { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.author-box-label { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); margin-bottom: 4px; }
.author-box-name { font-family: var(--font-serif); font-size: 22px; margin-bottom: 8px; }
.author-box-name a { color: var(--color-dark); }
.author-box-bio { font-size: 15px; color: var(--color-text-light); line-height: 1.6; }

/* Subscribe CTA */
.subscribe-cta-inner {
    background: var(--color-dark); color: white;
    border-radius: var(--radius); padding: 48px;
    text-align: center;
}
.subscribe-cta-eyebrow { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-accent-pale); margin-bottom: 12px; }
.subscribe-cta-title { font-family: var(--font-serif); font-size: 28px; color: white; margin-bottom: 24px; letter-spacing: -0.02em; }

/* Related posts */
.related-posts { padding: 80px 0; background: var(--color-bg-alt); }
.related-posts .section-title { margin-bottom: 40px; }

/* Page */
.page-header { padding: 64px 0; background: var(--color-dark); }
.page-title { font-family: var(--font-serif); font-size: clamp(32px, 5vw, 48px); color: white; letter-spacing: -0.03em; }
.page-subtitle { font-size: 18px; color: rgba(255,255,255,0.7); margin-top: 16px; }
.page-content { max-width: 740px; padding-top: 60px; padding-bottom: 80px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--color-dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-bottom: 60px; }
.footer-logo { font-family: var(--font-serif); font-size: 24px; color: white; display: block; margin-bottom: 12px; }
.footer-desc { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,0.5); max-width: 300px; }
.footer-nav ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { font-size: 14px; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-nav a:hover { color: white; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); text-align: center; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .posts-grid { grid-template-columns: repeat(2, 1fr); }
    .post-content-wrap { grid-template-columns: 1fr; }
    .post-sidebar { display: none; }
}

@media (max-width: 768px) {
    .post-featured { grid-template-columns: 1fr; }
    .featured-content { padding: 24px; }
    .posts-grid, .posts-grid--3 { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .newsletter-form, .subscribe-cta-form { flex-direction: column; }
    .newsletter-box { padding: 36px 24px; }
    .subscribe-cta-inner { padding: 32px 24px; }
    .site-nav .nav, .nav-list, .btn-subscribe { display: none; }
    .nav-toggle { display: flex; }
    .site-nav.is-open .nav,
    .site-nav.is-open .nav-list {
        display: flex; flex-direction: column; position: absolute;
        top: 68px; left: 0; right: 0; background: var(--color-white);
        padding: 16px; border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow);
    }
    .site-nav.is-open .btn-subscribe { display: block; margin: 8px 12px; }
    .post-header { padding: 40px 0 32px; }
}

/* Ghost cards */
.kg-width-wide { margin-left: -80px; margin-right: -80px; }
.kg-width-full { margin-left: -200px; margin-right: -200px; }
.kg-image-card img { border-radius: var(--radius-sm); }
.kg-gallery-container { display: flex; flex-direction: column; gap: 4px; }
.kg-gallery-row { display: flex; gap: 4px; }
.kg-gallery-image { flex: 1; }
.kg-gallery-image img { height: 100%; object-fit: cover; border-radius: 4px; }
.kg-callout-card {
    display: flex; gap: 16px; padding: 20px 24px;
    background: var(--color-accent-pale); border-radius: var(--radius-sm);
    border-left: 4px solid var(--color-accent); margin: 24px 0;
}
.kg-callout-emoji { font-size: 24px; flex-shrink: 0; }
.kg-toggle-card { border: 1.5px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden; margin: 16px 0; }
.kg-toggle-heading { padding: 14px 16px; font-weight: 600; cursor: pointer; }
.kg-bookmark-card { border: 1.5px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden; margin: 24px 0; }
.kg-bookmark-container { display: flex; padding: 16px; gap: 16px; }
.kg-bookmark-content { flex: 1; }
.kg-bookmark-title { font-weight: 600; margin-bottom: 4px; }
.kg-bookmark-description { font-size: 14px; color: var(--color-text-light); }

/* ============================================================
   JS-GENERATED / UTILITY STYLES
   ============================================================ */

/* Reading progress bar */
#reading-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    z-index: 1000;
    transition: width 0.1s linear;
    pointer-events: none;
}

/* TOC link active state */
.toc-link.is-active {
    color: var(--color-accent);
    font-weight: 600;
}

/* Subscribe success / error messages */
.subscribe-success {
    color: #2e7d32;
    font-weight: 500;
    margin: 0;
    padding: 12px 0;
}
.subscribe-error {
    color: #c62828;
    font-size: 14px;
    margin: 8px 0 0;
}

/* Nav open — prevent body scroll on mobile */
body.nav-open {
    overflow: hidden;
}

/* Nav toggle active state (hamburger → X) */
.nav-toggle.is-active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.nav-toggle.is-active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-toggle.is-active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}
.nav-toggle span {
    transition: transform 0.2s ease, opacity 0.2s ease;
}