/* ── Design tokens (dark) ───────────────────────────────────── */
:root {
  --bg:            oklch(0.158 0.004 80);
  --surface:       oklch(0.198 0.005 80);
  --surface2:      oklch(0.235 0.006 80);
  --border:        oklch(0.295 0.006 80);
  --border-strong: oklch(0.38 0.008 80);
  --text:          oklch(0.965 0.005 90);
  --text-muted:    oklch(0.72 0.008 85);
  --text-faint:    oklch(0.50 0.008 85);
  --accent:        oklch(0.88 0.18 130);
  --accent-dim:    oklch(0.70 0.14 130);
  --accent-soft:   oklch(0.88 0.18 130 / 0.12);

  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  --r-sm:   3px;
  --r-md:   6px;
  --r-lg:   10px;
  --r-pill: 999px;

  --max-width: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, ul, dl { margin-top: 0; }
h1, h2, h3 { line-height: 1.08; }

/* ── Layout ─────────────────────────────────────────────────── */
.page-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 1rem 0 6rem;
}

main {
  display: grid;
  gap: 8rem;
}

/* ── Anchor offset (clears sticky header) ───────────────────── */
section[id] {
  scroll-margin-top: 5rem;
}

/* ── Stuck header state (scroll-driven) ────────────────────── */
.site-header.is-stuck {
  top: 0;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  border-top-color: transparent;
}

/* ── Wordmark ───────────────────────────────────────────────── */
@keyframes koduo-blink {
  0%, 49%  { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.koduo-mark {
  font-family: var(--font-mono);
  font-feature-settings: "ss01", "ss02", "calt";
  font-weight: 500;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: baseline;
  line-height: 1;
  white-space: nowrap;
  font-size: 1.25rem;
  color: var(--text);
}

.koduo-cursor {
  display: inline-block;
  width: 0.08em;
  height: 0.78em;
  background: var(--accent);
  vertical-align: baseline;
  margin: 0 0.04em 0 0.02em;
  border-radius: 0.04em;
  transform: translateY(0.04em);
  animation: koduo-blink 1.06s steps(1, end) infinite;
}

.koduo-dots {
  display: inline-flex;
  align-items: baseline;
  margin-left: 0.18em;
  color: var(--text-faint);
}

.koduo-dot {
  display: inline-block;
  width: 0.18em;
  height: 0.18em;
  border-radius: 50%;
  background: currentColor;
  margin-left: 0.14em;
  vertical-align: baseline;
  transform: translateY(-0.04em);
}

/* KodWord — prefix accent treatment */
.kod-prefix {
  font-family: var(--font-mono);
  font-feature-settings: "ss01", "ss02";
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--accent);
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 1rem;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  margin-bottom: 3rem;
  padding: 0.875rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: oklch(0.158 0.004 80 / 0.88);
  backdrop-filter: blur(20px);
  transition: top 180ms ease, border-radius 180ms ease, border-color 180ms ease;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.35rem;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ── Nav ────────────────────────────────────────────────────── */
.site-nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  letter-spacing: -0.01em;
  transition: color 0.14s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--text);
}

/* ── Header tools ───────────────────────────────────────────── */
.header-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.language-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.language-button {
  border: none;
  padding: 0.375rem 0.75rem;
  background: transparent;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.14s ease, color 0.14s ease;
}

.language-button.is-active {
  background: var(--surface2);
  color: var(--text);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 1rem;
  background: var(--accent);
  color: oklch(0.18 0.01 130);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--r-sm);
  transition: background 0.14s ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  background: var(--accent-dim);
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.14s ease, color 0.14s ease, border-color 0.14s ease;
}

.btn-primary {
  background: var(--accent);
  color: oklch(0.18 0.01 130);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-dim);
}

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-strong);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--surface);
  color: var(--text);
}

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 1fr);
  gap: 3.5rem;
  align-items: center;
  padding: 5rem 0 1rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.status-dot {
  color: var(--accent);
  font-size: 0.55rem;
  line-height: 1;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.hero-text {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 52ch;
  line-height: 1.65;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ── Code window ────────────────────────────────────────────── */
.code-window {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1;
}

.code-titlebar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.traffic-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--border-strong);
  flex-shrink: 0;
}

.code-filepath {
  margin-left: 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  color: var(--text-faint);
}

.code-body {
  margin: 0;
  padding: 1rem 0;
  overflow-x: auto;
  counter-reset: codeline;
}

.code-line {
  display: flex;
  align-items: baseline;
  padding: 0 1.25rem;
  line-height: 1.9;
  counter-increment: codeline;
  min-height: 1.9em;
}

.code-line::before {
  content: counter(codeline);
  min-width: 1.5ch;
  margin-right: 1.75rem;
  text-align: right;
  color: var(--text-faint);
  opacity: 0.4;
  font-size: 0.6875rem;
  user-select: none;
  flex-shrink: 0;
}

.tok-comment { color: var(--text-faint); font-style: italic; }
.tok-keyword { color: var(--accent); }
.tok-name    { color: var(--text); }
.tok-prop    { color: var(--text); }
.tok-string  { color: var(--text-muted); }
.tok-punct   { color: var(--text-faint); }
.acc-dot     { color: var(--accent); font-style: normal; }

/* ── Sections ───────────────────────────────────────────────── */
.section {
  display: grid;
  gap: 2rem;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.section-intro {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 62ch;
}

.eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 1.125rem;
  height: 1px;
  background: var(--border-strong);
  flex-shrink: 0;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0;
  color: var(--text);
}

/* ── About ──────────────────────────────────────────────────── */
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(220px, 0.7fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.about-text {
  background: var(--surface);
  padding: 2rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.7;
}

.about-text p:last-child { margin-bottom: 0; }

.about-metrics {
  list-style: none;
  padding: 0;
  margin: 0;
  background: var(--surface);
  display: flex;
  flex-direction: column;
}

.metric-card {
  flex: 1;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.metric-card:last-child { border-bottom: none; }

.metric-card strong {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--accent);
  line-height: 1;
}

.metric-card span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ── Services ───────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.service-card {
  background: var(--surface);
  padding: 1.75rem;
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin-bottom: 0;
}

/* ── Projects ───────────────────────────────────────────────── */
.project-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 1rem;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  flex: 1;
  margin-bottom: 0;
}

.project-tags {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags li {
  padding: 0.2rem 0.625rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* ── Contact ────────────────────────────────────────────────── */
.contact-section {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  padding: 2.5rem;
}

.contact-section .section-heading {
  margin-bottom: 2.5rem;
}

.contact-intro {
  color: var(--text-muted);
  max-width: 56ch;
  margin-top: 0.5rem;
  margin-bottom: 0;
  font-size: 1rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1.45fr);
  gap: 2.5rem;
  align-items: start;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.contact-mail {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.01em;
  word-break: break-all;
  transition: color 0.14s ease;
}

.contact-mail:hover { color: var(--accent-dim); }

.contact-card p {
  color: var(--text-faint);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

/* ── Form ───────────────────────────────────────────────────── */
.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.5rem;
}

.contact-form label > span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-faint);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 0.6875rem 0.875rem;
  color: var(--text);
  font-size: 0.9375rem;
  transition: border-color 0.14s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-faint);
}

.contact-form input:disabled,
.contact-form textarea:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.contact-form .btn {
  justify-content: center;
}

.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin: 0;
  min-height: 1.2em;
}

.form-status.is-success {
  color: var(--accent);
}

.form-status.is-error {
  color: oklch(0.72 0.18 25);
}

/* ── Scroll animation ───────────────────────────────────────── */
[data-animate] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 480ms ease, transform 480ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .site-header {
    grid-template-columns: 1fr;
    justify-items: start;
    gap: 0.75rem;
  }

  .site-nav { justify-content: flex-start; }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 1rem;
  }

  .about-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .about-metrics {
    flex-direction: row;
  }

  .metric-card {
    border-bottom: none;
    border-right: 1px solid var(--border);
  }

  .metric-card:last-child { border-right: none; }

  .card-grid,
  .project-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 1rem), var(--max-width));
    padding-top: 0.5rem;
  }

  .site-header {
    top: 0.5rem;
    padding: 0.75rem 1rem;
  }

  h1 { font-size: clamp(2rem, 8vw, 2.5rem); }

  .hero { gap: 2rem; }

  .hero-stats {
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .contact-section { padding: 1.5rem; }

  .header-cta { display: none; }

  .about-metrics { flex-direction: column; }

  .metric-card {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .metric-card:last-child { border-bottom: none; }
}

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

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  [data-animate] { opacity: 1; transform: none; }
}