/* ============================================================
   FONTS — self-hosted Geist + Geist Mono (variable)
   ============================================================ */
@font-face {
  font-family: "Geist";
  src: url("../assets/fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("../assets/fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ============================================================
   TOKENS
   ============================================================ */
:root {
  --bg: #0b0c0e;
  --bg-1: #131418;
  --bg-2: #1a1c21;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f3f1ea;
  --text-dim: #a5a49d;
  --text-faint: #85837a;
  --accent: #ff5b2e;
  --accent-strong: #ff7a4d;
  --accent-ink: #180a04;
  --accent-tint: rgba(255, 91, 46, 0.1);

  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --radius-card: 14px;
  --radius-media: 10px;
  --radius-pill: 999px;

  --nav-h: 68px;
  --container: 1200px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================================
   RESET
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem 1rem;
  z-index: 200;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { position: relative; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(11, 12, 14, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  height: var(--nav-h);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav__mark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.nav__links a {
  transition: color 0.2s var(--ease);
}
.nav__links a:hover { color: var(--text); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.nav__icon-link {
  color: var(--text-dim);
  display: flex;
  transition: color 0.2s var(--ease);
}
.nav__icon-link:hover { color: var(--text); }

.nav__menu-btn {
  display: none;
  color: var(--text);
  position: relative;
  width: 22px;
  height: 22px;
}
.nav__menu-btn .icon-x { display: none; }
.nav__menu-btn[aria-expanded="true"] .icon-list { display: none; }
.nav__menu-btn[aria-expanded="true"] .icon-x { display: block; }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem 1.5rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.mobile-menu.is-open { display: flex; }
.mobile-menu a {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 0.98rem;
}
.mobile-menu a:last-child { border-bottom: none; }

/* ============================================================
   BUTTONS / TAGS / LINKS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:active { transform: scale(0.97); }

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

.btn--ghost {
  border: 1px solid var(--line-strong);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--text-dim); background: var(--bg-1); }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.1rem 0;
}
.tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--text-dim);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 0.32rem 0.75rem;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 0.15rem;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), gap 0.2s var(--ease);
}
.link-arrow:hover { border-color: var(--accent); color: var(--accent-strong); gap: 0.6rem; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 1.5rem);
  padding-bottom: 3rem;
}

.hero__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
  width: 100%;
}

.hero__headline {
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  line-height: 1.08;
  margin-bottom: 1.5rem;
}

.hero__subtext {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 46ch;
  line-height: 1.55;
  margin-bottom: 2.2rem;
}

.hero__ctas {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-height: 480px;
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 91, 46, 0.08), transparent 55%),
    var(--bg-1);
  overflow: hidden;
}

#agentGraph {
  width: 100%;
  height: 100%;
  display: block;
}

/* ============================================================
   EXPERIENCE
   ============================================================ */
.experience {
  padding: 6rem 0;
  border-top: 1px solid var(--line);
}

.experience__head {
  max-width: var(--container);
  margin: 0 auto 2.5rem;
  padding: 0 1.5rem;
}
.experience__head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
}

.experience__list {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.exp-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding: 2.25rem 0;
  border-top: 1px solid var(--line);
}
.exp-row:first-child { border-top: none; padding-top: 0; }

.exp-row__dates {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.exp-row__what h3 {
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}
.exp-row__org {
  color: var(--accent-strong);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.9rem;
}
.exp-row__what p:last-child {
  color: var(--text-dim);
  font-size: 0.98rem;
  line-height: 1.6;
  max-width: 60ch;
}

/* ============================================================
   PROCESS — horizontal scroll-hijack
   ============================================================ */
.process {
  padding: 6rem 0 0;
}

.process__head {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  margin-bottom: 3rem;
}
.process__head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  margin-bottom: 0.6rem;
}
.process__head p {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 60ch;
}

.process__wrap {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.process__wrap.js-pinned {
  overflow: hidden;
  scroll-snap-type: none;
}

.process__track {
  display: flex;
  gap: 1.5rem;
  padding: 0 1.5rem 1rem;
}

.process__panel {
  flex: 0 0 min(78vw, 460px);
  min-height: 340px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 2.4rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  scroll-snap-align: start;
}

.process__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: auto;
}

.process__panel h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 0.75rem;
}

.process__panel p {
  color: var(--text-dim);
  font-size: 0.98rem;
  line-height: 1.6;
}

/* desktop pin mode adds vertical breathing room */
.process.is-pinned .process__wrap {
  height: 100dvh;
  display: flex;
  align-items: center;
}

/* ============================================================
   WORK — sticky stack
   ============================================================ */
.work {
  padding: 8rem 0 4rem;
}

.work__head {
  max-width: var(--container);
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
}
.work__head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  margin-bottom: 0.6rem;
}
.work__head p {
  color: var(--text-dim);
  font-size: 1.05rem;
}

.work__stack {
  position: relative;
}

.work-card {
  padding: 1.25rem 1.5rem;
}

.work-card__inner {
  max-width: var(--container);
  margin: 0 auto;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  min-height: 420px;
  box-shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.6);
}

.work-card__text h3 {
  font-size: 1.9rem;
  margin-bottom: 1rem;
}
.work-card__text p {
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 46ch;
}

.work-card__media img {
  width: 100%;
  border-radius: var(--radius-media);
  border: 1px solid var(--line);
}

/* diagram component: authentic system-flow renders */
.diagram {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-media);
  padding: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.diagram__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
}
.diagram__row--muted { color: var(--text-faint); }
.diagram__row--final span:first-child { color: var(--accent-strong); }
.diagram .arrow { color: var(--accent); }
.diagram__loop {
  padding: 0.6rem 0.8rem;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--text-dim);
}
.diagram__muted { color: var(--text-faint); font-size: 0.76rem; }

/* ============================================================
   SKILLS
   ============================================================ */
.skills {
  padding: 6rem 0;
}
.skills__head {
  max-width: var(--container);
  margin: 0 auto 2.5rem;
  padding: 0 1.5rem;
}
.skills__head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  max-width: 24ch;
}

.skills__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.skill-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.9rem;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.skill-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.skill-card--wide { grid-column: span 2; }

.skill-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}
.skill-card p {
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ============================================================
   STACK MARQUEE
   ============================================================ */
.stack {
  padding: 3rem 0 5rem;
}
.stack__label {
  text-align: center;
  color: var(--text-faint);
  font-size: 0.92rem;
  margin-bottom: 1.75rem;
}

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.5rem 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.marquee__track {
  display: flex;
  gap: 3rem;
  width: max-content;
  animation: marquee-scroll 32s linear infinite;
}

.marquee__item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-dim);
  white-space: nowrap;
}
.marquee__item img { width: 20px; height: 20px; opacity: 0.85; }

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================================
   CONTACT / FOOTER
   ============================================================ */
.contact {
  padding: 7rem 0;
  border-top: 1px solid var(--line);
}
.contact__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.contact__inner h2 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin-bottom: 0.9rem;
  max-width: 20ch;
}
.contact__inner p {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 2.2rem;
}
.contact__ctas {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer {
  padding: 1.75rem 1.5rem 2.5rem;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .work-card__inner { grid-template-columns: 1fr; }
  .work-card__media { order: -1; }

  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .skill-card--wide { grid-column: span 2; }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__menu-btn { display: block; }

  .exp-row { grid-template-columns: 1fr; gap: 0.6rem; padding: 1.75rem 0; }

  .hero__inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero__visual { max-height: 320px; order: -1; }
  .hero__headline { font-size: clamp(2rem, 8vw, 2.6rem); }

  .process__panel { flex: 0 0 86vw; padding: 1.9rem; min-height: 280px; scroll-snap-align: start; }

  .work { padding: 4rem 0 2rem; }
  .work-card__inner { padding: 1.9rem; min-height: unset; }

  .skills__grid { grid-template-columns: 1fr; }
  .skill-card--wide { grid-column: span 1; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee__track { animation: none; }
  .skill-card:hover { transform: none; }
}