/* ---------- Tokens ---------- */
:root {
  --bg: #0a0a0b;
  --bg-soft: #0e0e10;
  --panel: #131315;
  --fg: #e9e6df;
  --muted: #8b877e;
  --line: #232320;
  --line-strong: #35352f;
  --accent: #d2a24c;
  --accent-soft: rgba(210, 162, 76, 0.10);
  --radius: 16px;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap: 1120px;
  --pad: clamp(20px, 5vw, 48px);
  --header-h: 66px;
}

[data-theme="light"] {
  --bg: #f4f1e9;
  --bg-soft: #eeeae0;
  --panel: #faf8f2;
  --fg: #171614;
  --muted: #6a665d;
  --line: #dcd6c9;
  --line-strong: #c3bcab;
  --accent: #8a5a1a;
  --accent-soft: rgba(138, 90, 26, 0.09);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 72% -8%, var(--accent-soft), transparent 68%),
    radial-gradient(700px 420px at 0% 30%, var(--accent-soft), transparent 70%);
}

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

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

p {
  margin: 0 0 1em;
}

h1, h2, h3 {
  font-weight: 400;
}

svg {
  max-width: 100%;
}

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

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--fg);
  color: var(--bg);
  border-radius: 8px;
  font-size: 13px;
  transition: top 0.2s ease;
}

.skip:focus {
  top: 12px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.01em;
}

.nav {
  display: flex;
  gap: 26px;
}

.nav a {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--fg);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--line-strong);
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

/* ---------- Hero ---------- */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--header-h));
  padding-top: 72px;
  padding-bottom: 88px;
}

.eyebrow {
  margin: 0 0 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  max-width: 17ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 6.6vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.hero-sub {
  max-width: 58ch;
  margin: 30px 0 0;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 19px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  border-color: var(--fg);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--fg);
  border-color: var(--fg);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 42px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--line-strong);
}

/* ---------- Sections ---------- */
.section {
  padding-top: clamp(72px, 10vw, 132px);
}

.section-head {
  margin-bottom: clamp(38px, 5.5vw, 60px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.section-label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section-intro {
  max-width: 60ch;
  margin: 18px 0 0;
  color: var(--muted);
}

/* ---------- Projects ---------- */
.project {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(34px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.project:last-of-type {
  border-bottom: 1px solid var(--line);
}

.project-rail {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  align-self: start;
}

.project-index {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.project-kind {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
}

.project-context {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

.project-body {
  max-width: 70ch;
}

.project-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.project-tagline {
  margin: 10px 0 24px;
  font-size: 15px;
  color: var(--accent);
}

.project-body > p {
  margin: 0 0 16px;
  color: var(--muted);
}

.project-close {
  margin-top: 24px !important;
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--fg) !important;
}

/* ---------- Diagrams ---------- */
.diagram {
  margin: 30px 0;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.diagram-caption {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.pipeline li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-height: 96px;
  padding: 16px;
  background: var(--panel);
}

.step-no {
  font-family: var(--font-mono);
  font-size: 9.5px;
  color: var(--accent);
}

.step-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
}

.step-sub {
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--muted);
}

.flow-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.dg-line {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}

.dg-a {
  stroke: var(--accent);
}

.dg-b {
  stroke: var(--muted);
}

.dg-fill {
  fill: var(--accent-soft);
}

.dg-dash {
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}

.dg-dot {
  fill: var(--accent);
}

.dg-dot-muted {
  fill: var(--muted);
}

.dg-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  fill: var(--muted);
}

.dg-accent {
  fill: var(--accent);
}

/* ---------- Callout / outcome ---------- */
.callout {
  margin: 22px 0;
  padding: 17px 20px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--fg);
}

.callout-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.project-outcome {
  margin: 26px 0 0 !important;
  padding-left: 14px;
  border-left: 2px solid var(--accent);
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.outcome-label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Also built ---------- */
.also {
  margin-top: 46px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.also h3 {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.also ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 44px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.also li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.also strong {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

.also span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- Experience ---------- */
.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.timeline li {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-when {
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}

.timeline-what h3 {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.2;
}

.role {
  margin: 4px 0 8px;
  font-size: 13px;
  color: var(--accent);
}

.timeline-what p:last-child {
  max-width: 72ch;
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.badge {
  padding: 3px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Principles ---------- */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.principles article {
  padding: 28px;
  background: var(--panel);
}

.principle-no {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent);
}

.principles h3 {
  margin: 16px 0 10px;
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.25;
}

.principles p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Background ---------- */
.background-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
}

.background-grid h3 {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.background-grid p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.65;
}

.background-grid strong {
  font-weight: 500;
}

.muted {
  color: var(--muted) !important;
  font-size: 14px !important;
}

/* ---------- Contact ---------- */
.contact {
  padding-bottom: clamp(80px, 12vw, 140px);
}

.contact h2 {
  font-size: clamp(2.8rem, 6vw, 4.6rem);
}

.contact-body {
  max-width: 48ch;
  margin: 22px 0 34px;
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  color: var(--muted);
}

.contact-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.email {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 2rem);
  line-height: 1.2;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.email:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Reveal ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.7s cubic-bezier(0.2, 0.6, 0.2, 1),
    transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}

.js .reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .project {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .project-rail {
    position: static;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 16px;
  }

  .project-index,
  .project-kind,
  .project-context {
    margin: 0;
  }

  .project-context {
    flex-basis: 100%;
  }

  .principles {
    grid-template-columns: 1fr;
  }

  .background-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav {
    display: none;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .timeline-when {
    padding-top: 0;
  }

  .also ul {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .pipeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-meta {
    flex-wrap: wrap;
    row-gap: 6px;
  }

  .diagram {
    padding: 14px;
  }

  .dg-label {
    font-size: 11px;
  }
}

@media (max-width: 360px) {
  .pipeline {
    grid-template-columns: 1fr;
  }
}

@media print {
  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .site-header,
  .theme-toggle {
    position: static;
  }
}

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

  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}