/* =========================================================
   The Architect — Portfolio
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --bg: #0c0e0f;
  --bg-elev: #111416;
  --surface: #14181a;
  --text: #ece4cc;          /* warm cream */
  --text-muted: #a7a293;
  --text-dim: #6f6c63;
  --line: #ece4cc;          /* strokes */
  --line-soft: rgba(236, 228, 204, 0.22);
  --line-faint: rgba(236, 228, 204, 0.1);
  --accent: #ece4cc;
  --accent-ink: #0c0e0f;
  --illustration-blend: lighten;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 4px;
  --container: 1160px;
  --header-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

[data-theme="light"] {
  --bg: #f8f0d8;            /* warm cream */
  --bg-elev: #efe5c9;
  --surface: #fcf5df;
  --text: #16191b;
  --text-muted: #4d4b45;
  --text-dim: #85817a;
  --line: #16191b;
  --line-soft: rgba(22, 25, 27, 0.25);
  --line-faint: rgba(22, 25, 27, 0.1);
  --accent: #16191b;
  --accent-ink: #f8f0d8;
  --illustration-blend: darken;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 8px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible { outline: 1px dashed var(--line); outline-offset: 4px; }

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

.icon {
  width: 1em;
  height: 1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-lg { width: 26px; height: 26px; stroke-width: 1.4; }
.muted { color: var(--text-muted); font-weight: 400; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line-faint); }

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo { display: inline-flex; align-items: center; }
.logo-img { height: 48px; width: auto; }
[data-theme="light"] .logo-img { filter: invert(1) grayscale(1); }
.logo-img + .logo-text { display: none; }
.logo-text {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 1;
}
.logo-a {
  display: inline-block;
  padding: 0 .06em;
  margin: 0 .04em;
  border-bottom: 2px solid currentColor;
  font-weight: 400;
}
.logo--sm .logo-text { font-size: 1rem; }
.logo--sm .logo-img { height: 43px; }

.nav { display: flex; gap: 34px; }
.nav-link {
  position: relative;
  font-size: .85rem;
  color: var(--text-muted);
  padding: 6px 0;
  transition: color .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link.active::after, .nav-link:hover::after { transform: scaleX(1); }

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

.theme-toggle {
  position: relative;
  width: 46px;
  height: 24px;
  padding: 0;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}
.theme-toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: grid;
  place-items: center;
  transition: transform .3s var(--ease);
}
.theme-toggle-knob .icon { width: 11px; height: 11px; stroke-width: 2; grid-area: 1 / 1; }
.icon-sun { opacity: 0; }
[data-theme="light"] .theme-toggle-knob { transform: translateX(22px); }
[data-theme="light"] .icon-sun { opacity: 1; }
[data-theme="light"] .icon-moon { opacity: 0; }

.menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  place-items: center;
}
.menu-btn .icon { width: 20px; height: 20px; }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: transparent;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}
.btn .icon { transition: transform .2s var(--ease); }
.btn:hover { border-color: var(--line); background: var(--line-faint); }
.btn:hover .icon { transform: translateX(3px); }
.btn-primary { border: 1.5px solid var(--line); font-weight: 600; }
.btn-primary:hover { background: var(--accent); color: var(--accent-ink); }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.link-arrow:hover { color: var(--text); border-color: var(--line); }

/* ---------- Section scaffolding ---------- */
.section {
  padding: 110px 0;
  border-top: 1px solid var(--line-faint);
}
.hero { border-top: 0; }

.section-label, .eyebrow, .stack-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.section-label { margin-bottom: 10px; }
.section-label span { color: var(--text); margin-right: .6em; }

.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 36px;
}
.section-title--sm { font-size: 1.4rem; margin-bottom: 20px; }

.section-intro {
  max-width: 480px;
  color: var(--text-muted);
  margin: -16px 0 28px;
}

.sub-title { font-size: 1rem; font-weight: 600; margin: 40px 0 16px; }

.card {
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
}
.card-title { font-size: 1rem; font-weight: 600; }
.card-text { color: var(--text-muted); font-size: .9rem; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags li {
  font-family: var(--font-mono);
  font-size: .72rem;
  padding: 3px 9px;
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  color: var(--text);
  transition: border-color .2s var(--ease);
}
.tags li:hover { border-color: var(--line); }

/* ---------- Illustration slots ----------
   Each <figure class="illustration"> holds an <img>. If the file
   does not exist yet, JS/onerror adds .is-empty and a dashed
   placeholder is shown with the expected filename. */
.illustration {
  position: relative;
  isolation: isolate;
  background: var(--bg);
  margin: 0;
  display: grid;
  place-items: center;
  min-height: 220px;
}
.illustration img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  /* Merge the paper/black backdrop into the page, retaining ink and highlights. */
  mix-blend-mode: var(--illustration-blend);
}
.illustration-hint { display: none; }

.illustration.is-empty {
  border: 1px dashed var(--line-soft);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(45deg, transparent 0 14px, var(--line-faint) 14px 15px);
}
.illustration.is-empty img { display: none; }
.illustration.is-empty .illustration-hint {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--text-dim);
  background: var(--bg);
  padding: 4px 10px;
  border: 1px solid var(--line-faint);
  border-radius: 3px;
}
.illustration.is-empty .illustration-hint::before { content: "assets/illustrations/"; opacity: .6; }

/* ---------- Hero ---------- */
.hero { padding: 70px 0 90px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
}
.corner-frame { position: relative; padding: 28px 0 28px 30px; }
.corner-frame::before, .corner-frame::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 18px;
  border-left: 1.5px solid var(--line);
}
.corner-frame::before { top: 0; border-top: 1.5px solid var(--line); }
.corner-frame::after { bottom: 0; border-bottom: 1.5px solid var(--line); }

.eyebrow { margin-bottom: 16px; }
.eyebrow span { margin: 0 .5em; }

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 4.4vw, 3.1rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 440px;
  margin-bottom: 36px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 56px;
  font-size: .8rem;
  color: var(--text-muted);
}
.hero-meta .dot { opacity: .6; }
.illustration--hero { aspect-ratio: 4 / 3; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: center;
}
.prose { display: grid; gap: 16px; max-width: 540px; color: var(--text-muted); }
.role-list { display: grid; gap: 14px; margin-top: 32px; }
.role-list li { display: flex; align-items: center; gap: 14px; font-size: .92rem; }
.role-list .icon { width: 20px; height: 20px; }
.illustration--about { aspect-ratio: 1 / 1; max-width: 380px; justify-self: end; width: 100%; }
.illustration--about.framed:not(.is-empty) { border: 1.5px solid var(--line); padding: 24px; }

/* ---------- Experience / timeline ---------- */
.timeline { position: relative; display: grid; gap: 56px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1.5px;
  background: var(--line-soft);
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 170px 1fr 280px;
  gap: 32px;
  padding-left: 36px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.timeline-date { font-size: .9rem; font-weight: 500; }
.timeline-body { border-left: 1px solid var(--line-faint); padding-left: 28px; }
.job-title { font-size: 1rem; font-weight: 600; }
.job-company { font-size: .9rem; color: var(--text-muted); }
.job-location {
  display: flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--text-dim); margin: 2px 0 14px;
}
.bullets { display: grid; gap: 6px; font-size: .88rem; color: var(--text-muted); }
.bullets li { position: relative; padding-left: 16px; }
.bullets li::before {
  content: "";
  position: absolute; left: 0; top: .65em;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--text);
}
.stack-label { margin-bottom: 12px; font-size: .7rem; }

/* ---------- Projects ---------- */
.projects { display: grid; gap: 20px; max-width: 880px; }
.project {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 22px 26px;
  transition: transform .25s var(--ease), background-color .25s var(--ease);
}
.project:hover { transform: translateY(-2px); background: var(--line-faint); }
.project-num {
  align-self: start;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
}
.project-body .card-text { margin: 4px 0 16px; max-width: 460px; }
.project-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; }
.project-icon {
  width: 84px;
  height: 64px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
}
.project-icon .icon { width: 30px; height: 30px; stroke-width: 1.4; }

/* ---------- Open source ---------- */
.os-head {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}
.illustration--os { aspect-ratio: 4 / 3; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); }
.stat { padding: 22px 28px; }
.stat + .stat { border-left: 1px solid var(--line-soft); }
.stat-label { font-size: .8rem; color: var(--text-muted); }
.stat-value { font-family: var(--font-mono); font-size: 1.6rem; font-weight: 600; margin-top: 4px; }

.repo-list { padding: 4px 22px; }
.repo {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
}
.repo + .repo { border-top: 1px solid var(--line-soft); }
.repo-icon { width: 22px; height: 22px; }
.repo-name { font-family: var(--font-mono); font-size: .88rem; font-weight: 500; }
.repo-name:hover { text-decoration: underline; text-underline-offset: 3px; }
.repo-desc { font-size: .8rem; color: var(--text-muted); }
.repo-stars { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: .85rem; }

/* ---------- Skills ---------- */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.skill { padding: 26px 28px; transition: background-color .25s var(--ease); }
.skill:hover { background: var(--line-faint); }
.skill-head { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  padding-left: 42px;
  font-size: .86rem;
  color: var(--text-muted);
}
.skill-list li { border-bottom: 1px solid var(--line-soft); line-height: 1.4; }

/* ---------- Education & principles ---------- */
.bg-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: stretch;
}
.edu-list { display: grid; gap: 22px; margin-bottom: 56px; }
.edu { display: flex; gap: 18px; align-items: flex-start; }
.edu .icon { margin-top: 2px; }
.edu-title { font-size: .95rem; font-weight: 500; }
.edu-meta { font-size: .8rem; color: var(--text-dim); }

.principles { padding-top: 40px; border-top: 1px solid var(--line-soft); }
.principle-list { display: grid; gap: 10px; }
.principle-list li { display: flex; align-items: center; gap: 12px; color: var(--text-muted); font-size: .92rem; }
.principle-list .icon { width: 18px; height: 18px; color: var(--text); }

.divider-left { position: relative; }
.illustration--bg { min-height: 420px; }
.illustration--bg:not(.is-empty) { border-left: 1.5px solid var(--line); padding-left: 32px; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: center;
}
.contact-list { display: grid; gap: 16px; margin-bottom: 32px; }
.contact-list li { display: flex; align-items: center; gap: 16px; font-size: .92rem; }
.contact-list .icon { width: 22px; height: 22px; }
.contact-list a { border-bottom: 1px solid transparent; transition: border-color .2s var(--ease); }
.contact-list a:hover { border-color: var(--line); }
.illustration--contact { aspect-ratio: 1 / 1; max-width: 320px; justify-self: end; width: 100%; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line-soft); padding: 32px 0; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.footer-tagline { font-size: .75rem; color: var(--text-dim); margin-top: 6px; }
.footer-social { display: flex; gap: 18px; }
.footer-social a { color: var(--text-muted); transition: color .2s var(--ease); }
.footer-social a:hover { color: var(--text); }
.footer-social .icon { width: 20px; height: 20px; }
.footer-copy {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .timeline-item { grid-template-columns: 140px 1fr; }
  .timeline-stack { grid-column: 2; padding-left: 28px; }
  .nav { gap: 22px; }
}

@media (max-width: 860px) {
  :root { --header-h: 64px; }

  .menu-btn { display: grid; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line-soft);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  }
  .nav.open { opacity: 1; transform: none; visibility: visible; }
  .nav-link { padding: 14px 0; font-size: 1rem; border-bottom: 1px solid var(--line-faint); }
  .nav-link::after { display: none; }

  .section { padding: 80px 0; }
  .hero { padding: 40px 0 70px; }

  .hero-grid, .about-grid, .bg-grid, .contact-grid, .os-head { grid-template-columns: 1fr; gap: 40px; }
  .illustration--about, .illustration--contact { justify-self: start; }
  .illustration--os { max-width: 300px; }
  .illustration--bg { min-height: 300px; }
  .illustration--bg:not(.is-empty) { border-left: 0; padding-left: 0; }

  .skills { grid-template-columns: 1fr; }
  .hero-meta { margin-top: 40px; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .logo-text { font-size: 1.2rem; }

  .timeline-item { grid-template-columns: 1fr; gap: 12px; padding-left: 28px; }
  .timeline-body { border-left: 0; padding-left: 0; }
  .timeline-stack { grid-column: auto; padding-left: 0; }

  .project { grid-template-columns: 1fr; padding: 20px; gap: 10px; }
  .project-icon { display: none; }
  .project-num { font-size: 1.2rem; }

  .stats { grid-template-columns: 1fr; }
  .stat + .stat { border-left: 0; border-top: 1px solid var(--line-soft); }

  .repo-list { padding: 4px 16px; }
  .skill { padding: 22px 20px; }
  .skill-list { padding-left: 0; }

  .btn-row .btn { flex: 1 1 auto; justify-content: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}