/* ============================================================
   HEXTRA THEME — Dark Blue Design System
   Inspired by the Hextra Hugo theme aesthetic
   ============================================================ */

/* ── FONTS ─────────────────────────────────────────────────── */
/* Inter (body), Syne (display headings), JetBrains Mono (code) */

/* ── CSS VARIABLES — DARK (default) ────────────────────────── */
:root {
  /* Dark blue palette */
  --navy-950: #020b18;
  --navy-900: #060f20;
  --navy-850: #0a1628;
  --navy-800: #0f1f35;
  --navy-700: #162840;
  --navy-600: #1e3554;
  --navy-500: #264468;
  --navy-400: #2f557e;

  /* Accent — electric blue */
  --accent-400: #38bdf8;
  --accent-500: #0ea5e9;
  --accent-600: #0284c7;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --accent-glow-strong: rgba(56, 189, 248, 0.25);

  /* Secondary accent — indigo */
  --indigo-400: #818cf8;
  --indigo-500: #6366f1;

  /* Semantic — dark mode (default) */
  --bg:           var(--navy-950);
  --bg-secondary: var(--navy-900);
  --bg-card:      var(--navy-850);
  --bg-card-hover:var(--navy-800);
  --bg-elevated:  var(--navy-700);
  --text:         #e2e8f0;
  --text-muted:   #94a3b8;
  --text-subtle:  #475569;
  --border:       rgba(56, 189, 248, 0.12);
  --border-hover: rgba(56, 189, 248, 0.28);
  --border-strong:rgba(56, 189, 248, 0.4);
  --accent:       var(--accent-400);
  --accent-bg:    var(--accent-glow);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,.5), 0 0 0 1px var(--border);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.6), 0 0 0 1px var(--border);
  --shadow-accent: 0 0 20px var(--accent-glow-strong);
  --shadow-glow:   0 0 40px rgba(56,189,248,.15);

  /* Typography */
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Syne', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-1: .25rem;  --space-2: .5rem;   --space-3: .75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;

  /* Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* Nav */
  --nav-h: 64px;

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur:  180ms;
}

/* ── LIGHT MODE OVERRIDES ───────────────────────────────────── */
[data-theme="light"] {
  --bg:           #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card:      #ffffff;
  --bg-card-hover:#f8fafc;
  --bg-elevated:  #e2e8f0;
  --text:         #0f172a;
  --text-muted:   #475569;
  --text-subtle:  #94a3b8;
  --border:       rgba(14, 165, 233, 0.15);
  --border-hover: rgba(14, 165, 233, 0.35);
  --border-strong:rgba(14, 165, 233, 0.5);
  --accent:       var(--accent-600);
  --accent-bg:    rgba(14,165,233,.08);
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08), 0 0 0 1px var(--border);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.10), 0 0 0 1px var(--border);
  --shadow-accent: 0 0 20px rgba(14,165,233,.15);
  --shadow-glow:   0 0 40px rgba(14,165,233,.10);
}

/* ── RESET & BASE ──────────────────────────────────────────── */
*, *::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-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }
img  { max-width: 100%; display: block; }
a    { color: var(--accent); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--accent); opacity: .8; }

/* ── CONTAINER ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container--narrow { max-width: 720px; }

/* ── SECTION ───────────────────────────────────────────────── */
.section        { padding: var(--space-20) 0; }
.section--alt   { background: var(--bg-secondary); }
.section__label {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-10);
}
.section__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-10);
  gap: var(--space-4);
}
.section__header .section__title { margin-bottom: 0; }
.subsection-label {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-subtle);
  margin-bottom: var(--space-5);
}

/* ── BUTTONS ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: .6rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn--primary {
  background: var(--accent-500);
  color: #fff;
  border-color: var(--accent-500);
  box-shadow: 0 0 12px rgba(14,165,233,.3);
}
.btn--primary:hover {
  background: var(--accent-400);
  border-color: var(--accent-400);
  color: #fff;
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(56,189,248,.4);
}
.btn--outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--border-hover);
}
.btn--outline:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--accent);
  opacity: 1;
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--accent); opacity: 1; }
.btn--sm { padding: .4rem .9rem; font-size: .8rem; }

/* ── PILLS & TAGS ──────────────────────────────────────────── */
.pill {
  display: inline-block;
  padding: 2px 10px;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 500;
  border: 1px solid var(--border);
}
.tag {
  display: inline-block;
  padding: 2px 9px;
  background: rgba(255,255,255,.04);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-size: .72rem;
  font-weight: 500;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
}
[data-theme="light"] .tag { background: var(--bg-secondary); }

/* ═══════════════════════════════════════════════════════════
   NAV
   ═══════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(2, 11, 24, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--dur) var(--ease);
}
[data-theme="light"] .nav { background: rgba(248,250,252,.9); }

.nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo:hover { color: var(--accent); opacity: 1; }
.nav__logo-icon { color: var(--accent); display: flex; }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}
.nav__link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--dur) var(--ease);
  text-decoration: none;
}
.nav__link:hover, .nav__link--active {
  color: var(--accent);
  background: var(--accent-bg);
  opacity: 1;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}
.nav__icon-link {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: all var(--dur) var(--ease);
  border: 1px solid transparent;
  text-decoration: none;
}
.nav__icon-link:hover {
  color: var(--accent);
  border-color: var(--border);
  background: var(--accent-bg);
  opacity: 1;
}
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: all var(--dur) var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
/* Show/hide sun-moon icons */
[data-theme="dark"]  .icon-sun  { display: none; }
[data-theme="dark"]  .icon-moon { display: block; }
[data-theme="light"] .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: none; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 34px; height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
.nav__burger span {
  display: block;
  width: 100%; height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all var(--dur) var(--ease);
}
.nav__mobile {
  display: none;
  flex-direction: column;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: var(--space-3) var(--space-6) var(--space-5);
  gap: var(--space-1);
}
.nav__mobile.is-open { display: flex; }
.nav__mobile-link {
  padding: var(--space-2) var(--space-3);
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  transition: all var(--dur) var(--ease);
  text-decoration: none;
}
.nav__mobile-link:hover { color: var(--accent); background: var(--accent-bg); opacity: 1; }
.nav__mobile-divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-2) 0;
}

/* ═══════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

/* Hextra-style grid lines background */
.hero__grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
  opacity: .6;
  pointer-events: none;
}
[data-theme="light"] .hero__grid-lines { opacity: .3; }

/* Glow orbs */
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero__glow--1 {
  width: 600px; height: 500px;
  background: radial-gradient(ellipse, rgba(56,189,248,.18) 0%, transparent 70%);
  top: -100px; left: -200px;
  animation: glowPulse 8s ease-in-out infinite;
}
.hero__glow--2 {
  width: 500px; height: 400px;
  background: radial-gradient(ellipse, rgba(99,102,241,.12) 0%, transparent 70%);
  bottom: -100px; right: -100px;
  animation: glowPulse 10s ease-in-out infinite 2s;
}
@keyframes glowPulse {
  0%, 100% { opacity: .7; transform: scale(1); }
  50%       { opacity: 1;  transform: scale(1.1); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  max-width: 760px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--accent-bg);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: var(--space-6);
  animation: fadeUp .5s var(--ease) both;
}
.hero__badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: dotPulse 2s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(56,189,248,.5); }
  50%       { box-shadow: 0 0 0 5px rgba(56,189,248,0); }
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: var(--space-5);
  animation: fadeUp .5s var(--ease) .1s both;
}
/* Gradient text on accent word */
.hero__headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-400), var(--indigo-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.75;
  margin-bottom: var(--space-8);
  animation: fadeUp .5s var(--ease) .2s both;
}
.hero__ctas {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
  animation: fadeUp .5s var(--ease) .3s both;
}
.hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
  animation: fadeUp .5s var(--ease) .4s both;
}
.hero__meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: .82rem;
  color: var(--text-subtle);
}
.hero__meta-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  background: var(--bg-card);
}
.hero__meta-link:hover { color: var(--accent); border-color: var(--border-hover); opacity: 1; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════
   SKILLS
   ═══════════════════════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: var(--space-4);
}
.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.skill-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.skill-card:hover::before { opacity: 1; }
.skill-card__icon { font-size: 1.4rem; margin-bottom: var(--space-3); }
.skill-card__name {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: var(--space-3);
}
.skill-card__pills { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ═══════════════════════════════════════════════════════════
   PROJECT CARDS
   ═══════════════════════════════════════════════════════════ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}
.project-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}
.project-card:hover::after { opacity: 1; }

.project-card__top { flex: 1; display: flex; flex-direction: column; gap: var(--space-3); }
.project-card__header { display: flex; justify-content: space-between; align-items: center; }
.project-card__folder { color: var(--accent); display: flex; }
.project-card__links { display: flex; gap: var(--space-2); }
.project-card__link {
  color: var(--text-subtle);
  display: flex; align-items: center;
  transition: color var(--dur) var(--ease);
  padding: var(--space-1);
  text-decoration: none;
}
.project-card__link:hover { color: var(--accent); opacity: 1; }
.project-card__title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; }
.project-card__title a { color: var(--text); text-decoration: none; }
.project-card__title a:hover { color: var(--accent); opacity: 1; }
.project-card__desc { font-size: .875rem; color: var(--text-muted); line-height: 1.65; flex: 1; }
.project-card__tags { display: flex; flex-wrap: wrap; gap: var(--space-2); padding-top: var(--space-2); }

/* ═══════════════════════════════════════════════════════════
   POST CARDS (timeline style)
   ═══════════════════════════════════════════════════════════ */
.post-list { display: flex; flex-direction: column; gap: 0; }
.post-card {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--dur) var(--ease);
}
.post-card:first-child { border-top: 1px solid var(--border); }
.post-card:hover .post-card__title a { color: var(--accent); }

.post-card__left {
  flex-shrink: 0;
  width: 72px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
  padding-top: 3px;
}
.post-card__date {
  font-size: .72rem;
  font-weight: 600;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-family: var(--font-mono);
  white-space: nowrap;
  text-align: right;
}
.post-card__line {
  flex: 1;
  width: 1px;
  background: var(--border);
  margin-right: 0;
  align-self: center;
  min-height: 20px;
}
.post-card__body { flex: 1; }
.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
  font-size: .75rem;
  color: var(--text-subtle);
}
.post-card__title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-2); }
.post-card__title a { color: var(--text); text-decoration: none; transition: color var(--dur) var(--ease); }
.post-card__desc { font-size: .875rem; color: var(--text-muted); line-height: 1.65; }

/* ═══════════════════════════════════════════════════════════
   CTA CARD
   ═══════════════════════════════════════════════════════════ */
.cta-section { background: var(--bg-secondary); }
.cta-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-12);
}
.cta-card__glow {
  position: absolute;
  width: 400px; height: 300px;
  top: -100px; right: -100px;
  background: radial-gradient(ellipse, rgba(56,189,248,.12) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(40px);
}
.cta-card__content { position: relative; z-index: 1; }
.cta-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: var(--space-3);
  letter-spacing: -.01em;
}
.cta-card__sub { color: var(--text-muted); font-size: 1rem; margin-bottom: var(--space-8); }
.cta-card__actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ═══════════════════════════════════════════════════════════
   PAGE HERO (inner pages)
   ═══════════════════════════════════════════════════════════ */
.page-hero {
  padding-top: calc(var(--nav-h) + var(--space-12));
  padding-bottom: var(--space-10);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .4;
  pointer-events: none;
}
[data-theme="light"] .page-hero::before { opacity: .15; }
.page-hero .container, .page-hero .container--narrow { position: relative; z-index: 1; }

.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: var(--space-3);
}
.page-hero__title--post { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
.page-hero__sub { font-size: 1rem; color: var(--text-muted); margin-bottom: var(--space-4); line-height: 1.7; }
.page-hero__tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.page-hero__links { display: flex; gap: var(--space-3); margin-top: var(--space-5); }
.back-link {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: .8rem; font-weight: 500;
  color: var(--text-subtle);
  margin-bottom: var(--space-5);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.back-link:hover { color: var(--accent); opacity: 1; }
.post-meta-header {
  font-size: .8rem;
  color: var(--text-subtle);
  display: flex; gap: var(--space-3); align-items: center;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
}
.dot { color: var(--border-strong); }

/* ═══════════════════════════════════════════════════════════
   ABOUT PAGE
   ═══════════════════════════════════════════════════════════ */
.about__inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-12);
  align-items: start;
}
.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  position: sticky;
  top: calc(var(--nav-h) + var(--space-6));
}
.profile-card__avatar-wrap {
  width: 100px; height: 100px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--accent-400), var(--indigo-400));
  padding: 2px;
}
.profile-card__avatar {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--bg-card);
  background: var(--bg-secondary);
}
.profile-card__name { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-1); }
.profile-card__role { font-size: .8rem; color: var(--accent); font-weight: 500; margin-bottom: var(--space-2); }
.profile-card__location {
  font-size: .78rem; color: var(--text-muted);
  display: flex; align-items: center; justify-content: center; gap: 4px;
  margin-bottom: var(--space-5);
}
.profile-card__socials { display: flex; justify-content: center; gap: var(--space-2); margin-bottom: var(--space-5); }
.soc-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-secondary);
  transition: all var(--dur) var(--ease);
  text-decoration: none;
}
.soc-btn:hover { color: var(--accent); border-color: var(--border-hover); background: var(--accent-bg); opacity: 1; }

/* ═══════════════════════════════════════════════════════════
   PROSE (rich text)
   ═══════════════════════════════════════════════════════════ */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
}
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text);
  margin-top: 2em;
  margin-bottom: .6em;
  line-height: 1.2;
}
.prose h2 {
  font-size: 1.35rem;
  padding-bottom: .4em;
  border-bottom: 1px solid var(--border);
}
.prose h3 { font-size: 1.1rem; }
.prose p { margin-bottom: 1.2em; }
.prose ul, .prose ol { margin: .8em 0 .8em 1.5em; }
.prose li { margin-bottom: .4em; }
.prose strong { font-weight: 600; color: var(--text); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote {
  border-left: 2px solid var(--accent);
  padding: var(--space-4) var(--space-6);
  margin: 1.5em 0;
  background: var(--accent-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-muted);
}
.prose code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .15em .4em;
  color: var(--accent);
}
.prose pre {
  background: var(--navy-900) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  overflow-x: auto;
  margin: 1.5em 0;
  position: relative;
}
[data-theme="light"] .prose pre { background: #0f172a !important; }
.prose pre code {
  background: none; border: none; padding: 0;
  color: #e2e8f0; font-size: .875rem; line-height: 1.7;
}
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }
.prose img { border-radius: var(--radius-lg); margin: 1.5em auto; border: 1px solid var(--border); }

/* ═══════════════════════════════════════════════════════════
   AUTHOR CARD
   ═══════════════════════════════════════════════════════════ */
.author-card {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-12);
}
.author-card__avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border: 2px solid var(--border-hover);
}
.author-card__name { font-weight: 700; font-family: var(--font-display); margin-bottom: var(--space-1); font-size: 1rem; }
.author-card__role { font-size: .8rem; color: var(--accent); margin-bottom: var(--space-2); }
.author-card__bio { font-size: .875rem; color: var(--text-muted); line-height: 1.65; }

/* ═══════════════════════════════════════════════════════════
   CERTIFICATES
   ═══════════════════════════════════════════════════════════ */
.cert-stats {
  display: flex; gap: var(--space-4);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}
.cert-stat {
  flex: 1; min-width: 140px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-8);
  display: flex; flex-direction: column; align-items: center;
}
.cert-stat__num {
  font-family: var(--font-display);
  font-size: 2.4rem; font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.cert-stat__label { font-size: .75rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .06em; }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-3);
  transition: all var(--dur) var(--ease);
  position: relative; overflow: hidden;
}
.cert-card__stripe {
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--cert-color, var(--accent));
}
.cert-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 1px var(--border-hover), var(--shadow-md);
  transform: translateY(-3px);
}
.cert-card__header { display: flex; justify-content: space-between; align-items: center; }
.cert-card__badge {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: .6rem; font-weight: 700; letter-spacing: .05em;
  color: var(--cert-color, var(--accent));
  font-family: var(--font-mono);
}
.cert-card__level {
  font-size: .65rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.cert-card__level--professional { background: rgba(56,189,248,.12); color: var(--accent-400); }
.cert-card__level--associate    { background: rgba(99,102,241,.12); color: var(--indigo-400); }
.cert-card__level--specialist   { background: rgba(168,85,247,.12); color: #c084fc; }
[data-theme="light"] .cert-card__level--professional { color: var(--accent-600); }
[data-theme="light"] .cert-card__level--associate    { color: #4338ca; }

.cert-card__title { font-family: var(--font-display); font-size: .95rem; font-weight: 700; line-height: 1.35; }
.cert-card__issuer { font-size: .8rem; color: var(--text-muted); }
.cert-card__dates { display: flex; gap: var(--space-6); }
.cert-card__date-label { display: block; font-size: .65rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-subtle); font-weight: 600; margin-bottom: 2px; }
.cert-card__date-val { font-size: .8rem; font-family: var(--font-mono); color: var(--text-muted); }
.cert-card__verify { margin-top: auto; font-size: .78rem; font-weight: 500; color: var(--accent); text-decoration: none; }
.cert-card__verify:hover { opacity: .8; }

/* ═══════════════════════════════════════════════════════════
   PAGINATION
   ═══════════════════════════════════════════════════════════ */
.pagination {
  display: flex; justify-content: center; align-items: center;
  gap: var(--space-4); margin-top: var(--space-12);
}
.pagination__info { font-size: .8rem; color: var(--text-subtle); font-family: var(--font-mono); }

/* ═══════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: var(--space-10) 0;
}
.footer__inner {
  max-width: 1100px; margin: 0 auto; padding: 0 var(--space-6);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-5); text-align: center;
}
.footer__top { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.footer__brand { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-weight: 700; font-size: .9rem; color: var(--text); }
.footer__logo { color: var(--accent); display: flex; }
.footer__tagline { font-size: .8rem; color: var(--text-subtle); }
.footer__social { display: flex; gap: var(--space-3); }
.footer__social-link {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-card);
  transition: all var(--dur) var(--ease);
  text-decoration: none;
}
.footer__social-link:hover { color: var(--accent); border-color: var(--border-hover); background: var(--accent-bg); opacity: 1; transform: translateY(-2px); }
.footer__bottom { display: flex; flex-direction: column; gap: var(--space-1); }
.footer__text { font-size: .8rem; color: var(--text-muted); }
.footer__powered { font-size: .72rem; color: var(--text-subtle); }
.footer__powered a { color: var(--text-subtle); text-decoration: underline; }

/* ═══════════════════════════════════════════════════════════
   404
   ═══════════════════════════════════════════════════════════ */
.not-found {
  min-height: calc(100vh - var(--nav-h));
  display: flex; align-items: center; justify-content: center;
  padding-top: var(--nav-h); text-align: center;
}
.not-found__num {
  font-family: var(--font-display); font-size: 8rem; font-weight: 800;
  color: var(--border); line-height: 1; margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--accent-400), var(--indigo-400));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.not-found__title { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin-bottom: var(--space-3); }
.not-found__sub { color: var(--text-muted); margin-bottom: var(--space-8); font-size: .95rem; line-height: 1.7; }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 860px) {
  .about__inner { grid-template-columns: 1fr; }
  .profile-card { position: static; max-width: 320px; margin: 0 auto; }
  .cta-card { padding: var(--space-8); }
  .cta-card__glow { display: none; }
}
@media (max-width: 640px) {
  .nav__links { display: none; }
  .nav__burger { display: flex; }
  .section { padding: var(--space-12) 0; }
  .section__header { flex-direction: column; align-items: flex-start; }
  .hero__meta { gap: var(--space-3); }
  .post-card { flex-direction: column; gap: var(--space-3); }
  .post-card__left { flex-direction: row; width: auto; align-items: center; }
  .post-card__line { display: none; }
  .cert-stats { justify-content: center; }
}