/* ─── TOKENS & VARIABLES ─────────────────────────────── */
:root {
    --bg:          #f9f8f6;
    --bg-alt:      #f2f0ec;
    --surface:     #ffffff;
    --border:      #e5e2db;
    --text:        #1a1916;
    --text-muted:  #7a776e;
    --accent:      #2d6a4f;
    --accent-dim:  #d8ede3;
    --accent-glow: rgba(45,106,79,0.12);
    --mono:        'DM Mono', monospace;
    --serif:       'DM Serif Display', serif;
    --body:        'Literata', Georgia, serif;
    --radius:      6px;
    --radius-lg:   14px;
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.04);
    --shadow-lg:   0 12px 40px rgba(0,0,0,0.09), 0 2px 8px rgba(0,0,0,0.04);
    --transition:  200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --max-w:       1100px;
}
 
[data-theme="dark"] {
    --bg:          #0f0f0e;
    --bg-alt:      #181817;
    --surface:     #1e1e1c;
    --border:      #2e2e2b;
    --text:        #eeecea;
    --text-muted:  #7a7a72;
    --accent:      #52b788;
    --accent-dim:  #1a2e22;
    --accent-glow: rgba(82,183,136,0.10);
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.3);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg:   0 12px 40px rgba(0,0,0,0.45);
}

/* ─── RESET & BASE ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; border-radius: var(--radius); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ─── LAYOUT SHARED ──────────────────────────────────── */
.container {
    width: min(var(--max-w), 100%);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ─── COMMON COMPONENTS ──────────────────────────────── */
.post-tag {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 100px;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

/* ─── NAV ────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(249,248,246,0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition), border-color var(--transition);
}
[data-theme="dark"] .nav { background: rgba(15,15,14,0.85); }

.nav__inner {
    display: flex; align-items: center; justify-content: space-between; height: 60px;
}

.nav__logo {
    font-family: var(--serif); font-size: 1.2rem; letter-spacing: -0.01em; color: var(--text); display: flex; align-items: center; gap: 0.5rem;
}
.nav__logo-dot {
    width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block;
}

.nav__links { display: flex; gap: 2rem; align-items: center; }
.nav__links a { font-family: var(--mono); font-size: 0.78rem; color: var(--text-muted); transition: color var(--transition); letter-spacing: 0.03em; }
.nav__links a:hover { color: var(--text); }

.nav__actions { display: flex; align-items: center; gap: 1rem; }

.theme-toggle {
    width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); display: flex; align-items: center; justify-content: center; transition: border-color var(--transition), background var(--transition), transform var(--transition); color: var(--text-muted);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: rotate(20deg); }
.theme-toggle svg { width: 16px; height: 16px; }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.hamburger span { display: block; width: 22px; height: 1.5px; background: var(--text); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
    display: none; position: fixed; top: 60px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 1.5rem; z-index: 99; flex-direction: column; gap: 1.25rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-family: var(--mono); font-size: 0.85rem; color: var(--text-muted); letter-spacing: 0.03em; transition: color var(--transition); }
.mobile-menu a:hover { color: var(--accent); }

/* ======================================================
   INDEX PAGE STYLES
   ====================================================== */
section { padding: 6rem 0; }
section:nth-child(even) { background: var(--bg-alt); }

.hero { padding: 9rem 0 7rem; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -40%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%); pointer-events: none; }

.hero__eyebrow { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.5rem; display: flex; align-items: center; gap: 0.75rem; opacity: 0; animation: fadeUp 0.6s 0.1s ease forwards; }
.hero__eyebrow::before { content: ''; display: inline-block; width: 28px; height: 1px; background: var(--accent); }

.hero__title { font-family: var(--serif); font-size: clamp(2.6rem, 6vw, 4.8rem); line-height: 1.1; letter-spacing: -0.02em; color: var(--text); max-width: 780px; margin-bottom: 1.5rem; opacity: 0; animation: fadeUp 0.6s 0.2s ease forwards; }
.hero__title em { font-style: italic; color: var(--accent); }

.hero__sub { font-size: 1.05rem; color: var(--text-muted); max-width: 520px; line-height: 1.75; margin-bottom: 2.5rem; opacity: 0; animation: fadeUp 0.6s 0.35s ease forwards; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; opacity: 0; animation: fadeUp 0.6s 0.5s ease forwards; }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.65rem 1.5rem; border-radius: var(--radius); font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.04em; transition: all var(--transition); }
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 2px 8px var(--accent-glow); }
.btn--primary:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.btn--ghost { border: 1px solid var(--border); color: var(--text-muted); background: var(--surface); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

.hero__stats { margin-top: 4rem; display: flex; gap: 3rem; flex-wrap: wrap; opacity: 0; animation: fadeUp 0.6s 0.65s ease forwards; }
.stat { display: flex; flex-direction: column; gap: 0.2rem; }
.stat__num { font-family: var(--serif); font-size: 2rem; color: var(--text); line-height: 1; }
.stat__label { font-family: var(--mono); font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; }

.section-header { margin-bottom: 3.5rem; }
.section-header__tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.6rem; }
.section-header__tag::before { content: ''; width: 20px; height: 1px; background: var(--accent); display: inline-block; }
.section-header__title { font-family: var(--serif); font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -0.02em; line-height: 1.15; color: var(--text); }
.section-header__desc { margin-top: 0.75rem; color: var(--text-muted); font-size: 0.97rem; max-width: 480px; }

/* Blog Cards */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }
.post-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; display: flex; flex-direction: column; gap: 1rem; transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); cursor: pointer; position: relative; overflow: hidden; }
.post-card::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 3px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
.post-card:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.post-card:hover::after { transform: scaleX(1); }
.post-card--featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.post-card__meta { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.post-date { font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); }
.post-read-time { font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); margin-left: auto; }
.post-card__title { font-family: var(--serif); font-size: 1.25rem; line-height: 1.3; color: var(--text); letter-spacing: -0.01em; }
.post-card--featured .post-card__title { font-size: 1.7rem; }
.post-card__excerpt { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; flex-grow: 1; }
.post-card__footer { display: flex; align-items: center; justify-content: space-between; padding-top: 0.75rem; border-top: 1px solid var(--border); }
.post-link { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); letter-spacing: 0.04em; display: flex; align-items: center; gap: 0.35rem; transition: gap var(--transition); }
.post-link:hover { gap: 0.6rem; }
.post-card__featured-badge { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--mono); font-size: 0.68rem; color: var(--text-muted); background: var(--bg-alt); border: 1px solid var(--border); padding: 0.25rem 0.65rem; border-radius: 100px; }
.badge-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: pulse 2s infinite; }

/* Github Cards */
.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.25rem; }
.project-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; display: flex; flex-direction: column; gap: 0.9rem; transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
.project-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.project-card__header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.project-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--accent-dim); display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1.1rem; flex-shrink: 0; }
.project-links { display: flex; gap: 0.5rem; }
.project-link-btn { width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-alt); display: flex; align-items: center; justify-content: center; color: var(--text-muted); transition: all var(--transition); }
.project-link-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.project-link-btn svg { width: 15px; height: 15px; }
.project-card__name { font-family: var(--mono); font-size: 0.95rem; color: var(--text); letter-spacing: -0.01em; }
.project-card__desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; flex-grow: 1; }
.project-stack { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tech-pill { font-family: var(--mono); font-size: 0.67rem; padding: 0.2rem 0.55rem; border-radius: 4px; background: var(--bg-alt); border: 1px solid var(--border); color: var(--text-muted); letter-spacing: 0.04em; }
.project-card__stats { display: flex; gap: 1rem; padding-top: 0.75rem; border-top: 1px solid var(--border); }
.proj-stat { display: flex; align-items: center; gap: 0.35rem; font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); }
.proj-stat svg { width: 13px; height: 13px; }
.lang-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* About Section */
.about-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 5rem; align-items: center; }
.about-avatar { aspect-ratio: 1; max-width: 300px; border-radius: var(--radius-lg); background: var(--accent-dim); display: flex; align-items: center; justify-content: center; font-size: 5rem; border: 3px solid var(--border); position: relative; overflow: hidden; }
.about-avatar::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, transparent 60%, var(--accent-glow)); }
.about-avatar-initials { font-family: var(--serif); font-size: 5rem; color: var(--accent); line-height: 1; opacity: 0.5; }
.about-content { display: flex; flex-direction: column; gap: 1.25rem; }
.about-content p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; }
.about-content p strong { color: var(--text); font-weight: 500; }
.skills-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }
.skill-tag { font-family: var(--mono); font-size: 0.72rem; padding: 0.3rem 0.8rem; border-radius: var(--radius); background: var(--accent-dim); color: var(--accent); border: 1px solid rgba(45,106,79,0.2); letter-spacing: 0.04em; }
[data-theme="dark"] .skill-tag { border-color: rgba(82,183,136,0.2); }

/* Contact Section */
.contact-wrap { max-width: 640px; margin: 0 auto; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.contact-wrap h2 { font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.02em; line-height: 1.15; }
.contact-wrap p { color: var(--text-muted); font-size: 1rem; max-width: 420px; line-height: 1.75; }
.contact-links { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; margin-top: 1rem; }
.contact-link { display: flex; align-items: center; gap: 0.6rem; padding: 0.7rem 1.4rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-family: var(--mono); font-size: 0.78rem; color: var(--text-muted); letter-spacing: 0.04em; transition: all var(--transition); }
.contact-link:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); transform: translateY(-2px); }
.contact-link svg { width: 16px; height: 16px; }

/* Animations & Utilities */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: none; }
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(0.85); }
}


/* ======================================================
   ARTICLE DETAIL PAGE STYLES
   ====================================================== */
.article-wrap { max-width: 720px; margin: 0 auto; padding: 8rem 1.5rem 6rem; }

.article-back { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.05em; color: var(--accent); display: inline-flex; align-items: center; gap: 0.4rem; margin-bottom: 2rem; text-transform: uppercase; transition: gap var(--transition); }
.article-back:hover { gap: 0.75rem; }

.article-header { margin-bottom: 3rem; }
.article-header__title { font-family: var(--serif); font-size: clamp(2.2rem, 5vw, 3.5rem); line-height: 1.15; letter-spacing: -0.02em; color: var(--text); margin-bottom: 1.5rem; }

.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; font-family: var(--mono); font-size: 0.8rem; color: var(--text-muted); border-bottom: 1px solid var(--border); padding-bottom: 2rem; }
.article-meta__item { display: flex; align-items: center; gap: 0.5rem; }

/* Article Content (Markdown) Typography */
.article-content { font-size: 1.125rem; line-height: 1.85; color: var(--text); }
.article-content p { margin-bottom: 1.75rem; }
.article-content h2 { font-family: var(--serif); font-size: 2.2rem; line-height: 1.2; margin: 3.5rem 0 1.5rem; letter-spacing: -0.01em; color: var(--text); }
.article-content h3 { font-family: var(--serif); font-size: 1.6rem; line-height: 1.3; margin: 2.5rem 0 1rem; color: var(--text); }
.article-content a { color: var(--accent); text-decoration: underline; text-decoration-color: var(--accent-dim); text-decoration-thickness: 2px; text-underline-offset: 4px; transition: text-decoration-color var(--transition); }
.article-content a:hover { text-decoration-color: var(--accent); }
.article-content blockquote { border-left: 3px solid var(--accent); padding-left: 1.5rem; margin: 2.5rem 0; font-style: italic; color: var(--text-muted); font-size: 1.2rem; }
.article-content ul, .article-content ol { margin-bottom: 1.75rem; padding-left: 1.5rem; }
.article-content li { margin-bottom: 0.5rem; }
.article-content li::marker { color: var(--accent); font-family: var(--mono); }

/* Code Blocks & Inline Code */
.article-content code { font-family: var(--mono); background: var(--bg-alt); color: var(--text); font-size: 0.85em; padding: 0.2em 0.4em; border-radius: 4px; border: 1px solid var(--border); }
.article-content pre { background: #1a1b26; padding: 1.5rem; border-radius: var(--radius-lg); overflow-x: auto; margin: 2.5rem 0; border: 1px solid rgba(255,255,255,0.1); box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
[data-theme="dark"] .article-content pre { background: #111110; border-color: var(--border); }
.article-content pre code { background: transparent; padding: 0; border: none; color: #a9b1d6; font-size: 0.85rem; line-height: 1.6; }

/* Syntax Highlighting Colors */
.code-keyword { color: #bb9af7; }
.code-function { color: #7aa2f7; }
.code-string { color: #9ece6a; }
.code-comment { color: #565f89; font-style: italic; }
.code-class { color: #e0af68; }

/* Author Box */
.author-box { margin-top: 5rem; padding: 2.5rem; background: var(--bg-alt); border-radius: var(--radius-lg); border: 1px solid var(--border); display: flex; gap: 1.5rem; align-items: center; }
.author-box__avatar { width: 80px; height: 80px; border-radius: 50%; background: var(--accent-dim); border: 2px solid var(--border); display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-size: 2rem; color: var(--accent); flex-shrink: 0; }
.author-box__content h4 { font-family: var(--serif); font-size: 1.25rem; margin-bottom: 0.5rem; }
.author-box__content p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.6; }
.author-box__links { display: flex; gap: 1rem; }
.author-box__links a { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); display: flex; align-items: center; gap: 0.3rem; }

/* ─── FOOTER ─────────────────────────────────────────── */
footer { border-top: 1px solid var(--border); padding: 2rem 0; background: var(--bg); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-logo { font-family: var(--serif); font-size: 1rem; color: var(--text); }
.footer-copy { font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.04em; }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.04em; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }

/* ─── BREADCRUMBS ─────────────────────────────────────── */
.breadcrumbs { padding-top: 5rem; padding-bottom: 0; }
.breadcrumbs ol { margin: 0; padding: 0.75rem 0; }
.breadcrumbs a { color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.breadcrumbs a:hover { color: var(--accent); }
/* Reduce excessive top spacing on sections that already reserve room for the fixed nav */
.breadcrumbs + .article-wrap { padding-top: 1.5rem; }
.breadcrumbs + .hero,
.breadcrumbs + .hero--sm,
.breadcrumbs + section > .hero,
.breadcrumbs + section.hero,
.breadcrumbs + section.hero--sm { padding-top: 2rem; }

/* ─── RESPONSIVE (MEDIA QUERIES) ─────────────────────── */
@media (max-width: 768px) {
    /* Nav & Layout */
    .nav__links { display: none; }
    .hamburger { display: flex; }

    /* Index Page */
    .hero { padding: 7rem 0 5rem; }
    section { padding: 4.5rem 0; }
    .post-card--featured { grid-column: auto; grid-template-columns: 1fr; gap: 1rem; }
    .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .about-avatar { max-width: 180px; }

    /* Detail Page */
    .article-wrap { padding-top: 6rem; }
    .article-header__title { font-size: 2.2rem; }
    .author-box { flex-direction: column; text-align: center; }
    .author-box__links { justify-content: center; }

    /* Breadcrumbs mobile */
    .breadcrumbs { padding-top: 4rem; }
    .breadcrumbs + .article-wrap { padding-top: 1rem; }

    /* Footer */
    .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    /* Index Page Specific Overrides */
    .hero__stats { gap: 1.75rem; }
    .hero__cta { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
}