:root {
  --bg: #080a0f;
  --surface: #0f1219;
  --surface-2: #151922;
  --text: #f3f6ef;
  --muted: #9199a8;
  --line: #282d38;
  --accent: #c7ff4a;
  --accent-soft: rgba(199, 255, 74, 0.1);
  --header: rgba(8, 10, 15, 0.76);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html[data-theme="light"] {
  --bg: #f4f6f0;
  --surface: #ffffff;
  --surface-2: #eaede5;
  --text: #11140f;
  --muted: #62695f;
  --line: #cdd2c8;
  --accent: #467900;
  --accent-soft: rgba(70, 121, 0, 0.1);
  --header: rgba(244, 246, 240, 0.8);
  --shadow: 0 24px 80px rgba(30, 40, 24, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--bg);
  background-size: 56px 56px;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: var(--bg);
  background: var(--accent);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.section-shell,
.site-header {
  width: min(1180px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0.75rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 4.5rem;
  margin-top: 0.75rem;
  padding: 0.8rem 1rem 0.8rem 1.2rem;
  border: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(16px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  width: fit-content;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.wordmark-mark {
  display: grid;
  width: 1.85rem;
  aspect-ratio: 1;
  place-items: center;
  color: var(--bg);
  background: var(--accent);
  font-size: 0.95rem;
}

.wordmark-muted {
  color: var(--muted);
}

.nav-links {
  display: flex;
  gap: 1.6rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.nav-links a {
  transition: color 160ms ease;
}

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

.theme-toggle {
  justify-self: end;
  display: grid;
  width: 2.75rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  font-size: 1.1rem;
  transition: border-color 160ms ease, background 160ms ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(20rem, 0.72fr);
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: center;
  min-height: calc(100vh - 6rem);
  padding-block: clamp(5rem, 11vw, 9rem);
}

.eyebrow {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-dot,
.status-pulse {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.65rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0.32rem var(--accent-soft);
}

h1,
h2,
h3,
p {
  text-wrap: balance;
}

h1 {
  max-width: 840px;
  margin: 0;
  font-size: clamp(3.4rem, 7.2vw, 7.2rem);
  line-height: 0.92;
  letter-spacing: -0.065em;
}

.accent-text {
  color: var(--accent);
}

.hero-intro {
  max-width: 640px;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.7vw, 1.35rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.15rem;
  padding: 0.8rem 1.15rem;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

.button-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.system-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.system-card::before {
  position: absolute;
  inset: 0;
  border-top: 2px solid var(--accent);
  content: "";
  pointer-events: none;
}

.system-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.window-dots {
  display: flex;
  gap: 0.35rem;
}

.window-dots i {
  display: block;
  width: 0.42rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--line);
}

.system-list {
  margin: 0;
  padding: 0.45rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.76rem;
}

.system-list div {
  display: grid;
  grid-template-columns: 5.3rem 1fr;
  gap: 0.8rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.system-list dt {
  color: var(--muted);
}

.system-list dt::before {
  color: var(--accent);
  content: "› ";
}

.system-list dd {
  margin: 0;
}

.status-pulse {
  width: 0.38rem;
  height: 0.38rem;
  margin-right: 0.5rem;
  box-shadow: none;
}

.trace {
  display: flex;
  align-items: end;
  gap: 0.38rem;
  height: 7.5rem;
  padding: 1.4rem 1.25rem 1.2rem;
}

.trace span {
  flex: 1;
  height: var(--h);
  min-width: 0.25rem;
  background: linear-gradient(to top, var(--accent-soft), var(--accent));
  opacity: 0.82;
  transform-origin: bottom;
  animation: trace-in 800ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.work,
.notes,
.about {
  padding-block: clamp(5.5rem, 10vw, 9rem);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}

.section-heading .eyebrow {
  margin-bottom: 0.9rem;
}

h2 {
  margin: 0;
  font-size: clamp(2.2rem, 4.5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.section-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.project-card {
  position: relative;
  display: grid;
  grid-template-columns: 3rem 1fr;
  min-height: 22rem;
  padding: 1.4rem;
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  transition: background 220ms ease, transform 220ms ease;
}

.project-card:hover {
  z-index: 1;
  background: var(--surface-2);
}

.project-card::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.project-card:hover::after {
  transform: scaleX(1);
}

.project-index {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.project-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.project-type {
  margin: 0 0 1.4rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h3 {
  margin: 0;
  font-size: clamp(1.55rem, 2.6vw, 2.35rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.project-body > p:not(.project-type) {
  max-width: 32rem;
  margin: 1.2rem 0 2rem;
  color: var(--muted);
}

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

.tags li {
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.project-featured {
  grid-column: span 2;
  min-height: 25rem;
}

.project-featured .project-body {
  max-width: 58%;
}

.project-glyph {
  position: absolute;
  right: 3rem;
  bottom: -1.5rem;
  color: transparent;
  font-family: var(--mono);
  font-size: clamp(5rem, 13vw, 11rem);
  font-weight: 900;
  letter-spacing: -0.12em;
  -webkit-text-stroke: 1px var(--line);
  user-select: none;
}

.open-source-card .text-link {
  margin-top: auto;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.notes-board {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  border: 1px solid var(--line);
  background: var(--surface);
}

.notes-empty {
  display: flex;
  gap: 2rem;
  align-items: center;
  min-height: 18rem;
  padding: clamp(2rem, 5vw, 4rem);
  border-right: 1px solid var(--line);
}

.notes-symbol {
  color: var(--accent);
  font-family: var(--mono);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.2em;
  white-space: nowrap;
}

.notes-empty p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.topic-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-list li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  align-items: center;
  min-height: 6rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  font-weight: 650;
}

.topic-list li:last-child {
  border-bottom: 0;
}

.topic-list span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.about-panel {
  padding: clamp(2rem, 6vw, 5rem);
  color: #0b0d08;
  background: var(--accent);
}

.about-panel .eyebrow {
  color: rgba(11, 13, 8, 0.65);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: end;
}

.about-grid h2 {
  max-width: 780px;
  font-size: clamp(2.2rem, 4.8vw, 4.6rem);
}

.about-copy p {
  margin: 0 0 2rem;
  font-size: 1.05rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid rgba(11, 13, 8, 0.3);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  transition: background 160ms ease;
}

.social-links a:hover {
  background: rgba(255, 255, 255, 0.22);
}

.social-links span {
  font-size: 0.68rem;
  opacity: 0.7;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  padding-block: 2.2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes trace-in {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

@media (max-width: 860px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .hero,
  .section-heading,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    gap: 4rem;
  }

  .system-card {
    width: min(100%, 34rem);
  }

  .project-featured .project-body {
    max-width: 76%;
  }

  .notes-board {
    grid-template-columns: 1fr;
  }

  .notes-empty {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 620px) {
  .section-shell,
  .site-header {
    width: min(100% - 1.25rem, 1180px);
  }

  .site-header {
    top: 0.4rem;
    margin-top: 0.4rem;
  }

  .hero {
    padding-block: 4.5rem 5.5rem;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.5rem);
  }

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

  .project-card,
  .project-featured {
    grid-column: auto;
    min-height: 22rem;
  }

  .project-featured .project-body {
    max-width: 100%;
  }

  .project-glyph {
    display: none;
  }

  .notes-empty {
    align-items: flex-start;
    min-height: auto;
    flex-direction: column;
  }

  .site-footer {
    gap: 0.8rem;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}