:root {
  --bg: #0e1418;
  --bg-elevated: #151c22;
  --fg: #e7eef3;
  --fg-muted: #b4c4ce;
  --accent: #3d9a8f;
  --accent-soft: rgba(61, 154, 143, 0.14);
  --line: rgba(231, 238, 243, 0.12);
  --danger-soft: rgba(220, 100, 90, 0.2);
  --font-display: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --space: clamp(1rem, 2vw, 1.5rem);
  --max: 68rem;
  --radius: 2px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(61, 154, 143, 0.14), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(90, 130, 160, 0.1), transparent 50%),
    var(--bg);
}

img {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #7fd0c5;
}

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

.btn:focus-visible,
.copy-btn:focus-visible,
.project__details summary:focus-visible,
.proof__item a:focus-visible,
.contact__list a:focus-visible,
.mobile-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 0.75rem;
  background: var(--accent);
  color: #04110f;
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) var(--space);
}

.section__inner {
  max-width: var(--max);
  margin-inline: auto;
}

.section__head {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.section__head h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.section__head p {
  margin: 0;
  color: var(--fg-muted);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  padding: clamp(2rem, 6vw, 4rem) var(--space);
  overflow: hidden;
}

.hero__atmosphere {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(231, 238, 243, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(231, 238, 243, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 30% 40%, black 20%, transparent 70%);
  pointer-events: none;
}

.hero__grid {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin-inline: auto;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: end;
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

.hero__eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

.hero__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.5rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.02;
}

.hero__role {
  margin: 0.85rem 0 0;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--fg);
}

.hero__tagline {
  margin: 1.25rem 0 0;
  max-width: 34rem;
  color: var(--fg-muted);
  font-size: 1.125rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.hero__meta {
  margin: 1.5rem 0 0;
  color: var(--fg-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.btn--primary {
  background: var(--accent);
  color: #04110f;
}

.btn--primary:hover {
  background: #4fb3a7;
  color: #04110f;
}

.btn--ghost {
  border-color: var(--line);
  color: var(--fg);
  background: transparent;
}

.btn--ghost:hover {
  border-color: rgba(61, 154, 143, 0.5);
  color: #7fd0c5;
}

.code-panel {
  margin: 0;
  padding: 1.25rem 1.35rem;
  background: linear-gradient(160deg, rgba(21, 28, 34, 0.95), rgba(14, 20, 24, 0.9));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: #b7c9d3;
  line-height: 1.55;
  overflow-x: auto;
  box-shadow: 0 0 0 1px rgba(61, 154, 143, 0.08), 0 24px 60px rgba(0, 0, 0, 0.35);
}

.code-panel code {
  font-family: inherit;
  white-space: pre;
}

/* Circuit breaker hero anchor */
.cb-panel {
  margin: 0;
  padding: 1rem 1.15rem 1.15rem;
  background:
    linear-gradient(165deg, rgba(24, 34, 40, 0.98), rgba(12, 18, 22, 0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(61, 154, 143, 0.1),
    0 24px 60px rgba(0, 0, 0, 0.4);
}

.cb-panel__chrome {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
  color: var(--fg-muted);
  font-size: 0.72rem;
}

.cb-panel__dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: rgba(231, 238, 243, 0.22);
}

.cb-panel__dot:nth-child(1) { background: #c97b6b; }
.cb-panel__dot:nth-child(2) { background: #c9a86b; }
.cb-panel__dot:nth-child(3) { background: #6bb58a; }

.cb-panel__title {
  margin-left: 0.35rem;
  letter-spacing: 0.04em;
}

.cb-panel__states {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.35rem;
  align-items: stretch;
}

.cb-state {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-height: 4.25rem;
  padding: 0.7rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.22);
  opacity: 0.45;
  transition: opacity 280ms ease, border-color 280ms ease, background-color 280ms ease, box-shadow 280ms ease;
}

.cb-state__name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg);
}

.cb-state__hint {
  font-size: 0.72rem;
  color: var(--fg-muted);
  line-height: 1.3;
}

.cb-edge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  min-width: 2.4rem;
  color: var(--fg-muted);
  opacity: 0.35;
  transition: opacity 280ms ease, color 280ms ease;
}

.cb-edge__label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.02em;
  text-align: center;
}

.cb-edge__arrow {
  font-size: 0.95rem;
  line-height: 1;
}

.cb-panel[data-state="closed"] .cb-state[data-cb-state="closed"],
.cb-panel[data-state="open"] .cb-state[data-cb-state="open"],
.cb-panel[data-state="half_open"] .cb-state[data-cb-state="half_open"] {
  opacity: 1;
  border-color: rgba(61, 154, 143, 0.65);
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px rgba(61, 154, 143, 0.2);
}

.cb-panel[data-state="closed"] .cb-state[data-cb-state="closed"] .cb-state__name,
.cb-panel[data-state="open"] .cb-state[data-cb-state="open"] .cb-state__name,
.cb-panel[data-state="half_open"] .cb-state[data-cb-state="half_open"] .cb-state__name {
  color: #9fe3d9;
}

.cb-panel[data-state="open"] .cb-edge[data-cb-edge="fail"],
.cb-panel[data-state="half_open"] .cb-edge[data-cb-edge="timeout"] {
  opacity: 1;
  color: var(--accent);
}

.cb-panel__live {
  margin: 0.9rem 0 0.65rem;
  color: var(--fg-muted);
  font-size: 0.78rem;
}

.cb-panel__live [data-cb-live-value] {
  color: #9fe3d9;
}

.cb-panel__code {
  margin: 0;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.28);
  color: #c5d5de;
  font-size: 0.78rem;
  line-height: 1.5;
  overflow-x: auto;
}

.cb-panel__code code {
  font-family: inherit;
  white-space: pre;
}

@media (max-width: 719px) {
  .cb-panel__states {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .cb-edge {
    flex-direction: row;
    min-height: auto;
    padding: 0.15rem 0;
  }

  .cb-edge__arrow {
    transform: rotate(90deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .cb-state,
  .cb-edge {
    transition: none;
  }
}

/* Proof */
.proof {
  padding-block: 0;
  border-block: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
}

.proof__list {
  list-style: none;
  margin: 0;
  padding: 1.25rem 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .proof__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

.proof__item a {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: inherit;
  text-decoration: none;
  min-height: 100%;
  padding: 0.35rem 0;
}

.proof__item a:hover .proof__label {
  color: #7fd0c5;
}

.proof__label {
  font-weight: 600;
}

.proof__detail {
  color: var(--fg-muted);
  font-size: 0.8rem;
}

/* Work */
.work__list {
  display: grid;
  gap: 2.5rem;
}

.project {
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.project__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  margin-bottom: 0.85rem;
}

.project__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.project__role {
  margin: 0.25rem 0 0;
  color: var(--fg-muted);
}

.project__status {
  color: var(--accent);
  margin: 0;
  max-width: 22rem;
  text-align: right;
}

.project__pitch {
  margin: 0 0 1rem;
  max-width: 46rem;
}

.project__bullets {
  margin: 0;
  padding-left: 1.15rem;
  max-width: 48rem;
  color: var(--fg-muted);
}

.project__bullets li + li {
  margin-top: 0.55rem;
}

.project__details {
  margin-top: 1.25rem;
}

.project__details summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  width: fit-content;
}

.project__details[open] summary {
  margin-bottom: 0.85rem;
}

.project__links {
  margin: 1rem 0 0;
}

.chip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip-list li {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(61, 154, 143, 0.12);
  color: #c5d5de;
  font-size: 0.78rem;
}

/* Principles */
.principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  counter-reset: principle;
}

@media (min-width: 800px) {
  .principles__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem 2rem;
  }
}

.principles__list li {
  position: relative;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
  counter-increment: principle;
}

.principles__list li::before {
  content: counter(principle, decimal-leading-zero);
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.principles__list h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
}

.principles__list p {
  margin: 0;
  color: var(--fg-muted);
}

/* Stack */
.stack__grid {
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 720px) {
  .stack__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .stack__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.stack__group h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

/* Contact */
.contact {
  padding-bottom: 7rem;
}

.contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  max-width: 36rem;
}

.contact__list li {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.contact__key {
  color: var(--fg-muted);
}

.copy-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg-muted);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius);
  cursor: pointer;
}

.copy-btn:hover,
.copy-btn[data-copied="true"] {
  border-color: rgba(61, 154, 143, 0.55);
  color: var(--accent);
}

.contact__note {
  margin: 1.75rem 0 0;
  color: var(--fg-muted);
  max-width: 40rem;
}

.site-footer {
  padding: 1.5rem var(--space) 5.5rem;
  border-top: 1px solid var(--line);
  color: var(--fg-muted);
}

.site-footer p {
  max-width: var(--max);
  margin: 0 auto;
  font-size: 0.9rem;
}

.mobile-cta {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #04110f;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

@media (max-width: 719px) {
  .mobile-cta {
    display: flex;
  }

  .contact__list li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* Motion: only hide when JS is available (html.js). Without JS, content stays visible. */
[data-reveal],
[data-reveal-group] [data-reveal] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  html.js [data-reveal],
  html.js [data-reveal-group] [data-reveal] {
    opacity: 0;
    transform: translateY(0.7rem);
    transition: opacity 500ms ease, transform 500ms ease;
  }

  html.js [data-reveal].is-visible,
  html.js [data-reveal-group].is-visible [data-reveal] {
    opacity: 1;
    transform: none;
  }

  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(1) { transition-delay: 40ms; }
  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(2) { transition-delay: 100ms; }
  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(3) { transition-delay: 160ms; }
  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(4) { transition-delay: 220ms; }
  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(5) { transition-delay: 280ms; }
  html.js [data-reveal-group].is-visible [data-reveal]:nth-child(6) { transition-delay: 340ms; }
}