@font-face {
  font-family: "JetBrains Mono";
  src: url("/JetBrainsMono.woff2") format("woff2");
  font-display: swap;
}

:root {
  --bg: #020405;
  --bg-soft: #071014;
  --panel: rgba(7, 16, 20, 0.88);
  --panel-strong: rgba(5, 12, 15, 0.96);
  --line: rgba(0, 188, 255, 0.18);
  --line-strong: rgba(0, 188, 255, 0.42);
  --cyan: #00bcff;
  --cyan-soft: #83e2ff;
  --green: #58f08c;
  --amber: #ffc65a;
  --red: #ff6e78;
  --text: #e7f1f4;
  --muted: #9eb0b6;
  --dim: #65777d;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.48);
  --radius: 18px;
  --content: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(0, 188, 255, 0.11), transparent 27rem),
    radial-gradient(circle at 88% 18%, rgba(88, 240, 140, 0.06), transparent 24rem),
    linear-gradient(180deg, #020405 0%, #030709 52%, #020405 100%);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image:
    linear-gradient(rgba(0, 188, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 188, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 92%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: .08;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    rgba(255,255,255,.07) 4px
  );
  mix-blend-mode: soft-light;
}

a {
  color: inherit;
}

::selection {
  color: #001017;
  background: var(--cyan);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: .65rem .9rem;
  color: #001018;
  background: var(--cyan);
  border-radius: 8px;
  transform: translateY(-180%);
  transition: transform .2s ease;
}

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

.shell-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 66px;
  padding: .75rem max(1rem, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(2, 6, 8, .84);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 35px rgba(0,0,0,.25);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  white-space: nowrap;
}

.brand-mark {
  color: var(--cyan);
  text-shadow: 0 0 14px rgba(0,188,255,.6);
}

.brand small {
  color: var(--dim);
  font-size: .67rem;
  font-weight: 500;
  letter-spacing: .08em;
}

.topnav {
  display: flex;
  align-items: center;
  gap: .2rem;
}

.topnav a,
.lang-switch a {
  color: var(--muted);
  text-decoration: none;
  font-size: .78rem;
  padding: .42rem .58rem;
  border-radius: 7px;
}

.topnav a:hover,
.topnav a:focus-visible,
.lang-switch a:hover,
.lang-switch a:focus-visible {
  color: var(--cyan-soft);
  background: rgba(0,188,255,.08);
  outline: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  margin-left: .3rem;
  padding: .15rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}

.lang-switch a {
  min-width: 2.2rem;
  text-align: center;
  border-radius: 999px;
}

.lang-switch a[aria-current="page"] {
  color: #001018;
  background: var(--cyan);
}

.page {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: 78vh;
  padding: clamp(4.5rem, 10vw, 8rem) 0 5rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 7% 46% auto auto;
  width: 340px;
  aspect-ratio: 1;
  border: 1px solid rgba(0,188,255,.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 42px rgba(0,188,255,.025),
    0 0 0 84px rgba(0,188,255,.018),
    0 0 90px rgba(0,188,255,.08);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1rem;
  color: var(--cyan-soft);
  font-size: .78rem;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.2rem;
  font-size: clamp(3.2rem, 9vw, 7.2rem);
  line-height: .92;
  letter-spacing: -.075em;
  color: #f4fbfd;
  text-shadow: 0 0 45px rgba(0,188,255,.12);
}

h1 span {
  color: var(--cyan);
}

.hero-copy {
  max-width: 720px;
}

.hero-copy > p {
  max-width: 690px;
  margin-bottom: 1.7rem;
  color: #b9c9ce;
  font-size: clamp(1rem, 1.7vw, 1.19rem);
}

.motto {
  display: block;
  margin-top: .85rem;
  color: var(--text);
  font-size: .93rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin: 1.8rem 0 1.55rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  min-height: 44px;
  padding: .7rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--cyan-soft);
  background: rgba(0,188,255,.07);
  text-decoration: none;
  font-size: .83rem;
  font-weight: 700;
  transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.btn.primary {
  color: #001018;
  background: var(--cyan);
  border-color: var(--cyan);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: 0 0 22px rgba(0,188,255,.18);
  outline: none;
}

.status-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.status-chips li {
  padding: .42rem .68rem;
  color: var(--muted);
  font-size: .72rem;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 999px;
  background: rgba(255,255,255,.025);
}

.status-chips strong {
  color: var(--green);
  font-weight: 600;
}

.terminal-window {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(3,10,13,.98), rgba(2,7,9,.96));
  box-shadow: var(--shadow), 0 0 60px rgba(0,188,255,.09);
}

.terminal-window::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 0 62%, rgba(0,188,255,.035) 63% 64%, transparent 65%);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: .42rem;
  padding: .75rem .9rem;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-size: .68rem;
  letter-spacing: .05em;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #23414a;
}

.dot:nth-child(1) { background: var(--red); }
.dot:nth-child(2) { background: var(--amber); }
.dot:nth-child(3) { background: var(--green); }

.terminal-title {
  margin-left: .35rem;
}

.terminal-body {
  min-height: 430px;
  padding: 1.2rem 1.25rem 1.5rem;
  color: #bfd2d7;
  font-size: clamp(.72rem, 1.3vw, .86rem);
  line-height: 1.85;
  white-space: pre-wrap;
}

.term-dim { color: #607880; }
.term-cyan { color: var(--cyan-soft); }
.term-green { color: var(--green); }
.term-amber { color: var(--amber); }

.cursor {
  display: inline-block;
  width: .6em;
  height: 1.05em;
  margin-left: 3px;
  vertical-align: -.12em;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(0,188,255,.7);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero-note {
  margin-top: 1rem;
  padding-left: .9rem;
  border-left: 2px solid var(--amber);
  color: var(--dim);
  font-size: .72rem;
}

.section {
  padding: 6.3rem 0 1rem;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, .62fr) minmax(0, .38fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2.2rem;
}

.kicker {
  margin-bottom: .55rem;
  color: var(--cyan);
  font-size: .76rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 0;
  color: #f3f9fb;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.04em;
}

.section-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}

.arch-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: .7rem;
}

.flow-node {
  position: relative;
  min-height: 116px;
  padding: .9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5,14,17,.74);
}

.flow-node:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -.73rem;
  z-index: 2;
  color: var(--cyan);
  transform: translateY(-50%);
}

.flow-node small {
  display: block;
  margin-bottom: .45rem;
  color: var(--dim);
  font-size: .61rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.flow-node strong {
  display: block;
  color: var(--cyan-soft);
  font-size: .88rem;
  line-height: 1.35;
}

.flow-node span {
  display: block;
  margin-top: .4rem;
  color: var(--muted);
  font-size: .69rem;
  line-height: 1.4;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.fact-card,
.principle,
.boringfs-card,
.roadmap-stage,
.repo-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(7,17,21,.84), rgba(4,10,13,.82));
  box-shadow: 0 18px 45px rgba(0,0,0,.22);
}

.fact-card {
  min-height: 210px;
  padding: 1.25rem;
}

.fact-index {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  color: var(--cyan);
  font-size: .7rem;
}

.fact-card h3 {
  margin-bottom: .55rem;
  color: #e9f7fb;
  font-size: 1rem;
}

.fact-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .78rem;
}

.fact-card code,
.inline-code {
  color: var(--cyan-soft);
  font-family: inherit;
}

.shell-proof {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 1rem;
  align-items: stretch;
}

.proof-copy {
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5,14,17,.72);
}

.proof-copy h3 {
  margin-bottom: .8rem;
  color: var(--cyan-soft);
  font-size: 1.35rem;
}

.proof-copy p,
.proof-copy li {
  color: var(--muted);
  font-size: .82rem;
}

.proof-copy ul {
  margin: 1.2rem 0 0;
  padding-left: 1.2rem;
}

.proof-terminal {
  padding: 1.3rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #020708;
  color: #cfe1e5;
  box-shadow: inset 0 0 55px rgba(0,188,255,.035);
  font-size: .82rem;
  line-height: 1.78;
  white-space: pre-wrap;
}

.roadmap-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .8rem;
  margin-bottom: 1.2rem;
}

.roadmap-stat {
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(4,12,15,.7);
}

.roadmap-stat strong {
  display: block;
  color: var(--cyan-soft);
  font-size: 1.45rem;
  letter-spacing: -.04em;
}

.roadmap-stat span {
  color: var(--dim);
  font-size: .69rem;
}

.roadmap {
  display: grid;
  gap: 1rem;
}

.roadmap-stage {
  position: relative;
  overflow: hidden;
  padding: 1.2rem;
}

.roadmap-stage::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--line-strong);
}

.roadmap-stage.complete::before { background: var(--green); }
.roadmap-stage.next::before { background: var(--cyan); box-shadow: 0 0 18px rgba(0,188,255,.6); }
.roadmap-stage.future::before { background: #394a50; }

.stage-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .9rem;
}

.stage-head h3 {
  margin: 0;
  color: #eaf5f8;
  font-size: 1rem;
}

.stage-head p {
  margin: .2rem 0 0;
  color: var(--dim);
  font-size: .68rem;
}

.stage-status {
  flex: 0 0 auto;
  padding: .32rem .55rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--dim);
  font-size: .61rem;
  letter-spacing: .08em;
}

.complete .stage-status { color: var(--green); }
.next .stage-status { color: var(--cyan); }

.milestone-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .55rem;
}

.milestone {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .7rem;
  align-items: center;
  min-height: 46px;
  padding: .55rem .65rem;
  border: 1px solid rgba(255,255,255,.055);
  border-radius: 9px;
  background: rgba(255,255,255,.016);
}

.milestone .num {
  color: var(--dim);
  font-size: .65rem;
}

.milestone .name {
  color: #b9cbd0;
  font-size: .72rem;
}

.milestone .state {
  color: var(--dim);
  font-size: .62rem;
}

.milestone.done .state { color: var(--green); }
.milestone.active {
  border-color: rgba(0,188,255,.3);
  background: rgba(0,188,255,.055);
}
.milestone.active .state { color: var(--cyan); }

.boringfs-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 1rem;
}

.boringfs-card {
  padding: 1.4rem;
}

.boringfs-card h3 {
  margin-bottom: .7rem;
  color: var(--cyan-soft);
  font-size: 1.12rem;
}

.boringfs-card p {
  color: var(--muted);
  font-size: .8rem;
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
  margin-top: 1rem;
}

.format-item {
  padding: .75rem;
  border: 1px solid rgba(255,255,255,.065);
  border-radius: 9px;
  background: rgba(255,255,255,.018);
}

.format-item small {
  display: block;
  color: var(--dim);
  font-size: .61rem;
  text-transform: uppercase;
}

.format-item strong {
  display: block;
  margin-top: .2rem;
  color: var(--green);
  font-size: .8rem;
}

.disk-map {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #020708;
}

.disk-block {
  margin-bottom: .55rem;
  padding: .75rem;
  border: 1px solid rgba(0,188,255,.17);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(0,188,255,.035);
  font-size: .72rem;
}

.disk-block strong {
  color: var(--cyan-soft);
}

.principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.principle {
  padding: 1.25rem;
}

.principle h3 {
  margin-bottom: .55rem;
  color: #eaf5f8;
  font-size: .95rem;
}

.principle p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .78rem;
}

.repo-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 1.6rem;
  margin-top: 1rem;
  border-color: rgba(0,188,255,.28);
  box-shadow: var(--shadow), 0 0 70px rgba(0,188,255,.055);
}

.repo-panel h2 {
  margin-bottom: .6rem;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
}

.repo-panel p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .8rem;
}

.repo-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .65rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 4rem 0 2.5rem;
  color: var(--dim);
  font-size: .68rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--cyan-soft);
  outline: none;
}

.footer-motto {
  color: var(--cyan);
}

@media (max-width: 1050px) {
  .topnav > a { display: none; }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 5rem;
  }

  .hero-copy { max-width: 850px; }

  .terminal-window { max-width: 760px; }

  .arch-flow {
    grid-template-columns: repeat(3, 1fr);
  }

  .flow-node:nth-child(3)::after { display: none; }

  .fact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 780px) {
  .shell-topbar {
    padding-inline: .8rem;
  }

  .brand small { display: none; }

  .page {
    width: min(calc(100% - 1.2rem), var(--content));
  }

  .hero {
    padding-top: 4rem;
    gap: 2.6rem;
  }

  .section {
    padding-top: 4.7rem;
  }

  .section-heading,
  .shell-proof,
  .boringfs-grid,
  .repo-panel {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 1rem;
  }

  .arch-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow-node:nth-child(2)::after,
  .flow-node:nth-child(4)::after { display: none; }
  .flow-node:nth-child(3)::after { display: block; }

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

  .repo-actions {
    justify-content: flex-start;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: clamp(3rem, 18vw, 5rem);
  }

  .topnav {
    margin-left: auto;
  }

  .arch-flow,
  .fact-grid,
  .roadmap-overview,
  .format-grid {
    grid-template-columns: 1fr;
  }

  .flow-node::after { display: none !important; }

  .terminal-body {
    min-height: 0;
    padding: 1rem;
    font-size: .7rem;
  }

  .milestone {
    grid-template-columns: auto 1fr;
  }

  .milestone .state {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}