/* Theme tokens */
:root {
  --bg: #05070a;
  --panel: rgba(8,12,20,0.8);
  --text: #eef4ff;
  --muted: #9fb0c2;
  --brand: #0ea5e9;
  --brand-2: #6366f1;
  --ring: rgba(14,165,233,0.35);
  --card: rgba(15,20,27,0.82);
  --shadow: 0 25px 60px rgba(2,6,23,0.45);
  --border: 1px solid rgba(255,255,255,0.06);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --panel: rgba(255,255,255,0.8);
    --text: #0f172a;
    --muted: #475569;
    --brand: #0ea5e9;
    --brand-2: #6366f1;
    --ring: rgba(14,165,233,0.35);
    --card: rgba(255,255,255,0.92);
    --shadow: 0 18px 40px rgba(15,23,42,0.12);
    --border: 1px solid rgba(2,6,23,0.06);
  }
}

[data-theme="dark"] {
  --bg: #05070a;
  --panel: rgba(8,12,20,0.8);
  --text: #eef4ff;
  --muted: #9fb0c2;
  --brand: #0ea5e9;
  --brand-2: #6366f1;
  --ring: rgba(14,165,233,0.35);
  --card: rgba(15,20,27,0.82);
  --shadow: 0 25px 60px rgba(2,6,23,0.45);
  --border: 1px solid rgba(255,255,255,0.06);
}

[data-theme="light"] {
  --bg: #f8fafc;
  --panel: rgba(255,255,255,0.9);
  --text: #0f172a;
  --muted: #475569;
  --brand: #0ea5e9;
  --brand-2: #6366f1;
  --ring: rgba(14,165,233,0.35);
  --card: rgba(255,255,255,0.94);
  --shadow: 0 18px 40px rgba(15,23,42,0.12);
  --border: 1px solid rgba(2,6,23,0.06);
}

/* Reset and base */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Inter", "SF Pro Display", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(35% 45% at 20% 20%, color-mix(in oklab, var(--brand) 16%, transparent) 0%, transparent 70%),
    radial-gradient(40% 55% at 80% 10%, color-mix(in oklab, var(--brand-2) 18%, transparent) 0%, transparent 75%),
    radial-gradient(65% 65% at 50% 100%, color-mix(in oklab, var(--brand) 14%, transparent) 0%, transparent 70%),
    linear-gradient(180deg, color-mix(in oklab, var(--bg) 80%, transparent), var(--bg));
  filter: saturate(110%);
}

img, svg { display: block; max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Progress bar */
.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: transparent; z-index: 60; }
.progress span { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--brand), var(--brand-2)); }

/* Under Construction banner */
.uc-banner {
  position: sticky;
  top: 0;
  z-index: 70;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 1rem;
  border-bottom: var(--border);
  background:
    repeating-linear-gradient(
      -45deg,
      color-mix(in oklab, var(--brand) 25%, transparent) 0 12px,
      color-mix(in oklab, var(--brand-2) 25%, transparent) 12px 24px
    ),
    color-mix(in oklab, var(--panel) 90%, transparent);
  color: var(--text);
}
.uc-banner p { margin: 0; font-weight: 600; }
.uc-stripes { display: none; }
.uc-dismiss {
  font-size: 1.25rem;
  line-height: 1;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 8px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: color-mix(in oklab, var(--panel) 85%, transparent);
  border-bottom: var(--border);
  backdrop-filter: blur(12px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}
.nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav a {
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  transition: background 160ms ease, color 160ms ease;
  color: var(--text);
}
.nav a:hover {
  background: color-mix(in oklab, var(--brand) 20%, transparent);
  text-decoration: none;
}
.nav a.is-current {
  background: linear-gradient(90deg, color-mix(in oklab, var(--brand) 65%, transparent), color-mix(in oklab, var(--brand-2) 65%, transparent));
  color: #fff;
  box-shadow: 0 10px 25px rgba(14,165,233,0.25);
}
.icon-btn {
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0.4rem;
  border-radius: 10px;
  cursor: pointer;
}
.icon-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
#theme-toggle .icon-sun { display: none; }
[data-theme="light"] #theme-toggle .icon-sun { display: block; }
[data-theme="light"] #theme-toggle .icon-moon { display: none; }

/* Hero */
.hero {
  position: relative;
  min-height: 80vh;
  display: grid;
  place-items: center;
  border-bottom: var(--border);
  overflow: clip;
  padding-bottom: 8rem;
}
.hero canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.55;
  mix-blend-mode: screen;
  z-index: 0;
}
.hero-bg {
  position: absolute;
  inset: -25% -10% 0 -10%;
  background: radial-gradient(60% 80% at 70% 20%, color-mix(in oklab, var(--brand) 40%, transparent) 0%, transparent 60%),
              radial-gradient(80% 80% at 20% 10%, color-mix(in oklab, var(--brand-2) 40%, transparent) 0%, transparent 60%),
              radial-gradient(120% 100% at 50% 100%, color-mix(in oklab, var(--brand) 18%, transparent) 0%, transparent 60%);
  filter: blur(40px);
  transform: translateZ(0);
}
.hero-glow {
  position: absolute;
  inset: -5% 0 0 0;
  pointer-events: none;
  background: conic-gradient(from 180deg at 50% 50%, color-mix(in oklab, var(--brand) 30%, transparent), color-mix(in oklab, var(--brand-2) 30%, transparent), transparent);
  opacity: 0.25;
  filter: blur(60px);
}
.hero-inner {
  position: relative;
  padding: 5rem 1rem 3rem;
  text-align: center;
  z-index: 1;
  max-width: 940px;
  display: grid;
  gap: 1rem;
}
.hero-title { font-size: clamp(2.3rem, 4.5vw, 3.8rem); letter-spacing: -0.03em; margin: 0; }
.hero-subtitle { max-width: 70ch; margin: 0 auto 0.75rem; color: var(--muted); }
.hero-intro {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: color-mix(in oklab, var(--muted) 70%, var(--text) 30%);
}
.hero-cta { display: inline-flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }
.badges { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; margin-top: 0.5rem; }
.badges span { font-size: 0.85rem; padding: 0.35rem 0.6rem; border-radius: 999px; border: var(--border); background: color-mix(in oklab, var(--panel) 55%, transparent); }

.hero-cards {
  position: absolute;
  left: 50%;
  bottom: -5.5rem;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 1rem;
  width: min(95vw, 960px);
  pointer-events: none;
}
.mini-card {
  border-radius: 20px;
  padding: 1.1rem 1.2rem;
  backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--card) 70%, transparent);
  border: var(--border);
  box-shadow: 0 20px 40px rgba(2,6,23,0.25);
  pointer-events: auto;
}
.mini-card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.mini-card p { margin: 0; font-size: 0.95rem; color: var(--muted); }

.scroll-down { position: absolute; bottom: 1rem; left: 50%; transform: translateX(-50%); font-size: 0.85rem; color: var(--muted); }

/* Page hero */
.page-hero {
  position: relative;
  padding: clamp(3rem, 12vw, 5.5rem) 1rem clamp(2.5rem, 8vw, 4rem);
  border-bottom: var(--border);
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: -20% -20% 0 -20%;
  background: radial-gradient(55% 55% at 15% 15%, color-mix(in oklab, var(--brand) 35%, transparent) 0%, transparent 65%),
              radial-gradient(70% 70% at 80% 10%, color-mix(in oklab, var(--brand-2) 35%, transparent) 0%, transparent 70%),
              radial-gradient(80% 80% at 50% 100%, color-mix(in oklab, var(--brand) 20%, transparent) 0%, transparent 70%);
  filter: blur(50px);
}
.page-hero-inner {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
  text-align: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.85rem;
  color: color-mix(in oklab, var(--muted) 70%, var(--text) 30%);
  margin: 0;
}
.page-hero h1 { margin: 0; font-size: clamp(2rem, 4.2vw, 3.3rem); letter-spacing: -0.02em; }
.lede { margin: 0 auto; max-width: 60ch; color: var(--muted); }

/* Sections */
.section { padding: clamp(2rem, 5vw, 4.5rem) 1rem; max-width: 1100px; margin: 0 auto; }
.section-head { display: grid; gap: 0.35rem; margin-bottom: 1.5rem; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0; }
.section-head p { color: var(--muted); margin: 0; }

/* Cards and UI */
.card {
  background: var(--card);
  border: var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 0.35rem; }
.card .list { margin: 0.25rem 0 0; padding-left: 1.25rem; }
.card .list li { margin: 0.25rem 0; }

.lift { padding: 1.2rem; transition: transform 200ms ease, box-shadow 200ms ease; }
.lift:hover { transform: translateY(-4px); box-shadow: 0 22px 45px rgba(2,6,23,0.35); }

/* Layout grids */
.about-grid { display: grid; gap: 1rem; grid-template-columns: repeat(12, 1fr); }
.about-grid > *:nth-child(1) { grid-column: span 5; }
.about-grid > *:nth-child(2) { grid-column: span 4; }
.about-grid > *:nth-child(3) { grid-column: span 3; }

.stat-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.values-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.value-card p { color: var(--muted); margin: 0; }

.split { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.project-grid,
.blog-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(12, 1fr);
}
.project,
.blog-grid > article {
  grid-column: span 6;
  overflow: clip;
}

@media (max-width: 900px) {
  .about-grid > * { grid-column: 1 / -1; }
  .project,
  .blog-grid > article { grid-column: 1 / -1; }
  .hero-cards { grid-template-columns: 1fr; bottom: -6rem; }
  .hero { padding-bottom: 10rem; }
}

@media (max-width: 640px) {
  .site-header { flex-wrap: wrap; justify-content: center; }
  .hero-inner { padding-top: 4rem; }
  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-cards { position: static; transform: none; width: 100%; padding: 1rem; }
  .hero { padding-bottom: 2rem; }
}

.project img,
.blog-grid img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.project-body,
.blog-body {
  padding: 1rem;
  display: grid;
  gap: 0.6rem;
}

.project .actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Additional grids */
.project-gallery { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.gallery-item { display: grid; gap: 0.5rem; }
.gallery-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.85rem; }

.playground-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* Blog specifics */
.blog-body h3 { margin: 0; font-size: 1.25rem; letter-spacing: -0.01em; }
.blog-body h3 a { color: var(--text); text-decoration: none; }
.blog-body h3 a:hover { text-decoration: underline; }
.blog-body p { margin: 0.25rem 0 0.25rem; color: var(--muted); }
.blog-body time { font-size: 0.875rem; color: var(--muted); }
.blog-body .tags { margin-top: 0.25rem; }

.article-body {
  display: grid;
  gap: 1.25rem;
  max-width: 70ch;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}
.article-body blockquote {
  border-left: 4px solid color-mix(in oklab, var(--brand) 55%, transparent);
  padding: 0.5rem 1rem;
  margin: 0;
  color: var(--text);
  font-style: italic;
}
.article-body ul {
  padding-left: 1.5rem;
  display: grid;
  gap: 0.5rem;
}

.blog-feature-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.blog-feature { display: grid; gap: 0.5rem; }
.blog-feature time { color: var(--muted); font-size: 0.85rem; }

.blog-list { display: grid; gap: 1rem; }
.blog-list-item { display: grid; gap: 0.35rem; }
.blog-list-item time { color: var(--muted); font-size: 0.85rem; }

/* Buttons & chips */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0; list-style: none; }
.tags li,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: var(--border);
  background: color-mix(in oklab, var(--panel) 50%, transparent);
  color: var(--text);
  font-size: 0.85rem;
}
.chip { cursor: pointer; user-select: none; }
.chip.is-active { outline: 2px solid var(--brand); outline-offset: 2px; }

.btn {
  --btn-bg: var(--brand);
  --btn-fg: #fff;
  --btn-ring: var(--ring);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.95rem;
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(14,165,233,0.25);
  background: var(--btn-bg);
  color: var(--btn-fg);
}
.btn:hover { filter: brightness(1.02); }
.btn:focus-visible { outline: 3px solid var(--btn-ring); outline-offset: 2px; }
.btn-primary { background: linear-gradient(90deg, var(--brand), var(--brand-2)); color: var(--btn-fg); }
.btn-ghost { background: transparent; border: var(--border); box-shadow: none; color: var(--text); }
.btn-small { padding: 0.45rem 0.75rem; font-size: 0.9rem; }

.inline-form {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
}
.inline-form input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: var(--border);
  background: color-mix(in oklab, var(--panel) 65%, transparent);
  color: var(--text);
}
.inline-form input:focus-visible { outline: 3px solid var(--ring); }

/* CTA panel */
.cta-panel {
  margin-top: 2rem;
  padding: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}
.cta-panel p { color: var(--muted); margin: 0; }

/* Contact */
.contact-grid { display: grid; gap: 1rem; grid-template-columns: 2fr 1fr; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-form { display: grid; gap: 0.65rem; }
label { display: grid; gap: 0.35rem; font-weight: 600; }
input, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: var(--border);
  background: color-mix(in oklab, var(--panel) 70%, transparent);
  color: var(--text);
}
input:focus-visible, textarea:focus-visible { outline: 3px solid var(--ring); }

/* Footer */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-top: var(--border);
  background: color-mix(in oklab, var(--panel) 92%, transparent);
}
.back-to-top { padding: 0.4rem 0.6rem; border-radius: 8px; border: var(--border); }

/* Reveal animations (reduced motion respected) */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.is-visible { opacity: 1; transform: none; transition: opacity 500ms ease, transform 500ms ease; }
@media (prefers-reduced-motion: reduce) {
  .lift:hover { transform: none; }
  .reveal, .reveal.is-visible { opacity: 1; transform: none; transition: none; }
}

/* Print style for resume */
@media print {
  .site-header, .progress, .hero, .filters, .back-to-top, #theme-toggle, .uc-banner { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .section, .site-footer { box-shadow: none; border: 0; }
}