/* ============================================================
   BASE / RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--space-4));
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background var(--dur-mid) var(--ease-out),
              color var(--dur-mid) var(--ease-out);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection { background: var(--accent-soft); color: var(--text); }

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-24);
  border-top: 1px solid var(--border);
}
.section:first-of-type { border-top: none; }

.section__head {
  margin-bottom: var(--space-12);
  max-width: var(--maxw-prose);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: var(--space-3);
}

h1, h2, h3 { line-height: var(--lh-snug); letter-spacing: var(--tracking-tight); font-weight: 600; }
h2 { font-size: var(--fs-h2); line-height: var(--lh-tight); }
h3 { font-size: var(--fs-h3); }

.lead { font-size: var(--fs-body-lg); color: var(--text-muted); max-width: var(--maxw-prose); }
.muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }

/* ============================================================
   SKIP LINK
   ============================================================ */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); }

/* ============================================================
   NAV - single line, <=64px
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  width: 100%;
}
.nav__brand { font-weight: 600; letter-spacing: var(--tracking-tight); }
.nav__brand span { color: var(--accent-strong); }
.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__links a { font-size: var(--fs-small); color: var(--text-muted); transition: color var(--dur-fast) var(--ease-out); }
.nav__links a:hover { color: var(--text); }
.nav__actions { display: flex; align-items: center; gap: var(--space-3); }

.nav-toggle-links { display: none; }

@media (max-width: 720px) {
  .nav__links a:not(.nav__cta) { display: none; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-small);
  font-weight: 500;
  white-space: nowrap;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--accent); color: var(--accent-contrast); }
.btn--primary:hover { background: var(--accent-strong); }

.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-strong); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { color: var(--accent-strong); border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }

/* ============================================================
   HERO - asymmetric split, fits viewport, <=4 text elements
   ============================================================ */
.hero {
  position: relative;
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.hero__eyebrow { display: flex; align-items: center; gap: var(--space-3); }
.hero__available {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--fs-mono-label);
  color: var(--text-muted);
}
.hero__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  margin-block: var(--space-4);
}
.hero h1 em { font-style: normal; color: var(--accent-strong); }
.hero__sub { font-size: var(--fs-body-lg); color: var(--text-muted); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }

/* Decorative geometric visual - CSS only, not a fake screenshot */
.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 25%, var(--accent-soft), transparent 55%),
    var(--bg-inset);
  overflow: hidden;
}
.hero__visual::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: 32px 32px;
  mask-image: radial-gradient(circle at 50% 45%, #000 30%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 30%, transparent 72%);
  opacity: 0.6;
  pointer-events: none;
}
.hero__visual-code {
  position: absolute;
  left: var(--space-6); right: var(--space-6);
  bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--text-muted);
}
.hero__visual-code .k { color: var(--accent-strong); }

/* ============================================================
   PROOF / STRENGTHS
   ============================================================ */
.proof__cols { display: grid; grid-template-columns: 2fr 1fr; gap: var(--space-12); }
.strength-list { display: grid; gap: var(--space-4); }
.strength {
  display: grid; grid-template-columns: auto 1fr; gap: var(--space-4);
  align-items: start;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}
.strength:last-child { border-bottom: none; }
.strength__icon { color: var(--accent-strong); margin-top: 3px; }
.strength__icon svg { width: 20px; height: 20px; }
.strength h3 { font-size: 1rem; margin-bottom: 2px; }
.strength p { font-size: var(--fs-small); color: var(--text-muted); }

.growing {
  padding: var(--space-6);
  border-radius: var(--radius-md);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  align-self: start;
}
.growing h3 { font-size: var(--fs-small); text-transform: uppercase; letter-spacing: var(--tracking-label); font-family: var(--font-mono); color: var(--text-muted); margin-bottom: var(--space-4); font-weight: 500; }
.growing ul { display: grid; gap: var(--space-3); }
.growing li { display: flex; align-items: center; gap: var(--space-3); font-size: var(--fs-small); }
.growing li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--border-strong); flex: none; }

/* ============================================================
   WORK - project cards (asymmetric, not 3 equal cards)
   ============================================================ */
.work__grid { display: grid; gap: var(--space-6); }
.work__grid { grid-template-columns: repeat(2, 1fr); }
.project {
  grid-column: span 1;
  display: flex; flex-direction: column;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out);
}
.project:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.project--featured { grid-column: 1 / -1; }
.project__top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.tag {
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
}
.project h3 { margin-bottom: var(--space-3); }
.project__desc { font-size: var(--fs-small); color: var(--text-muted); margin-bottom: var(--space-6); }
.project__meta { display: grid; gap: var(--space-3); margin-top: auto; }
.project__row { display: grid; grid-template-columns: 84px 1fr; gap: var(--space-4); font-size: var(--fs-small); }
.project__row dt { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-faint); padding-top: 2px; }
.project__stack { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip { font-family: var(--font-mono); font-size: 0.72rem; padding: 2px var(--space-2); border-radius: var(--radius-sm); background: var(--bg-inset); color: var(--text-muted); border: 1px solid var(--border); }
.project__note { font-size: 0.78rem; color: var(--text-faint); margin-top: var(--space-4); padding-top: var(--space-4); border-top: 1px dashed var(--border-strong); }

/* Featured project internal split */
.project--featured .project__body { display: grid; grid-template-columns: 1.2fr 1fr; gap: var(--space-12); }
.metric {
  display: flex; flex-direction: column; gap: var(--space-1);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
}
.metric__value { font-family: var(--font-mono); font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.2rem); font-weight: 500; color: var(--accent-strong); letter-spacing: var(--tracking-tight); }
.metric__label { font-size: var(--fs-small); color: var(--text-muted); }

/* ============================================================
   CASE STUDY
   ============================================================ */
.case { display: grid; gap: var(--space-6); }
.case__row { display: grid; grid-template-columns: 140px 1fr; gap: var(--space-6); padding-bottom: var(--space-6); border-bottom: 1px solid var(--border); }
.case__row:last-child { border-bottom: none; }
.case__row dt { font-family: var(--font-mono); font-size: var(--fs-mono-label); text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--accent-strong); }
.case__row dd { color: var(--text-muted); }
.case__row dd strong { color: var(--text); font-weight: 500; }

/* ============================================================
   STACK GROUPS
   ============================================================ */
.stack__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.stack__group { padding: var(--space-6); border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--bg-elevated); }
.stack__group h3 { font-family: var(--font-mono); font-size: var(--fs-small); text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--text-muted); margin-bottom: var(--space-4); font-weight: 500; }
.stack__group .project__stack { gap: var(--space-2); }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.exp { display: grid; gap: var(--space-6); }
.exp__item { display: grid; grid-template-columns: 200px 1fr; gap: var(--space-6); padding-bottom: var(--space-6); border-bottom: 1px solid var(--border); }
.exp__item:last-child { border-bottom: none; }
.exp__when { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--text-faint); }
.exp__role { font-weight: 600; margin-bottom: 2px; }
.exp__org { color: var(--accent-strong); font-size: var(--fs-small); margin-bottom: var(--space-3); }
.exp__desc { font-size: var(--fs-small); color: var(--text-muted); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { text-align: center; }
.contact__head { max-width: none; margin-inline: auto; }
.contact__links { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-4); margin-top: var(--space-8); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--border); padding-block: var(--space-8); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.footer p { font-size: var(--fs-small); color: var(--text-faint); }

/* ============================================================
   REVEAL MOTION (MOTION 5) - IntersectionObserver-driven
   ============================================================ */
/* Reveal only hides when JS is present. Without JS everything stays visible. */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn:active { transform: none; }
  .project:hover { transform: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: var(--space-12); }
  .hero__visual { order: -1; max-width: 380px; }
  .proof__cols { grid-template-columns: 1fr; }
  .work__grid { grid-template-columns: 1fr; }
  .project--featured .project__body { grid-template-columns: 1fr; }
  .stack__grid { grid-template-columns: 1fr; }
  .exp__item { grid-template-columns: 1fr; gap: var(--space-2); }
  .case__row { grid-template-columns: 1fr; gap: var(--space-2); }
}

@media (max-width: 520px) {
  .container { padding-inline: var(--space-4); }
  .section { padding-block: var(--space-16); }
  .project__row { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .nav, .hero__visual, .hero__cta, .contact__links, .footer, .icon-btn { display: none; }
  body { background: #fff; color: #000; }
  .section { border-top: 1px solid #ccc; padding-block: var(--space-8); }
  a { color: #000; }
}