/* Crow — prototype. Dark, violet, editorial-minimal. No build step. */

:root {
  --bg:        #07060b;
  --bg-soft:   #0c0b13;
  --text:      #e8e6f0;
  --text-dim:  #8a8798;
  --text-mute: #5c5968;
  --accent:    #8b5cf6;
  --accent-2:  #a78bfa;
  --line:      #1b1826;
  --max:       720px;
  --mono:      ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans:      ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif:     ui-serif, Georgia, "Times New Roman", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  color: var(--accent-2);
}

/* ---- background layers ---- */
#bg, #bg-fallback {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  z-index: 0;
}
#bg { display: block; }
#bg-fallback {
  /* CSS-only fallback if WebGL is unavailable */
  background:
    radial-gradient(120% 90% at 50% 0%, #15102a 0%, var(--bg) 60%),
    var(--bg);
  display: none;
}
body.no-gl #bg { display: none; }
body.no-gl #bg-fallback { display: block; }

/* page content above the canvas */
main, .foot { position: relative; z-index: 100; }

/* ---- top-right nav (earendil pattern) ---- */
.top-nav {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 200;
}
.menu-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(12, 11, 19, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all .15s;
}
.menu-trigger:hover { border-color: var(--accent); color: var(--text); }
.menu-chevron { font-size: 1.1em; transition: transform .2s; }
.menu-trigger[aria-expanded="true"] .menu-chevron { transform: rotate(90deg); }
.menu-links {
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  background: rgba(12, 11, 19, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.4rem;
  min-width: 160px;
}
.menu-links[hidden] { display: none; }
.nav-link {
  display: block;
  padding: 0.4rem 0.6rem;
  font-size: 0.88rem;
  color: var(--text-dim);
  border-radius: 4px;
  transition: all .12s;
}
.nav-link:hover { color: var(--text); background: var(--bg-soft); }

/* ---- hero spacer: first viewport, logo centered, scrolls up naturally ---- */
.hero-spacer {
  height: 100vh;
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: grid;
  place-items: center;
}
.main-logo {
  width: min(420px, 65vw);
  height: auto;
  filter: drop-shadow(0 0 40px rgba(139, 92, 246, 0.15));
}

/* ---- scroll-snap sticky sections ---- */
.snap-section {
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem max(1.5rem, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
}
.snap-section h2 {
  font-size: clamp(1.6rem, 4.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.snap-section p { color: var(--text-dim); margin-bottom: 1.25rem; }
.snap-section p strong { color: var(--text); font-weight: 600; }
.tool-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
.tool-list li {
  border-left: 2px solid var(--line);
  padding-left: 1rem;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.tool-list li:hover { border-left-color: var(--accent); }
.install-sub { color: var(--text-mute); font-size: 0.92rem; }
#task-loop-viz { margin: 1.5rem 0; }

/* what we didn't build table */
.neg-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
.neg-table td { padding: 0.8rem 0; border-top: 1px solid var(--line); vertical-align: top; }
.neg-table td.neg-item { color: var(--text); font-family: var(--mono); font-size: 0.85rem; white-space: nowrap; padding-right: 2.5rem; width: 1%; }
.neg-table td.neg-why { color: var(--text-dim); font-size: 0.92rem; line-height: 1.5; }

/* ---- skip link ---- */
.skip {
  position: absolute;
  left: -999px; top: 0;
  z-index: 50;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
}
.skip:focus { left: 12px; top: 12px; }

/* ---- nav ---- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.brand { display: inline-flex; align-items: center; gap: 0.5rem; }
.brand-mark { width: 22px; height: 22px; display: block; }
.brand-name { font-weight: 700; letter-spacing: -0.02em; font-size: 1.15rem; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; font-size: 0.92rem; }
.nav-links a { color: var(--text-dim); transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.35rem 0.75rem;
}
.nav-cta:hover { border-color: var(--accent); color: var(--accent-2) !important; }

/* ---- hero ---- */
.hero {
  min-height: 86vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
}
.wordmark {
  font-size: clamp(3.5rem, 13vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 1.25rem;
  background: linear-gradient(180deg, var(--text) 0%, #b9a7e8 130%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lede {
  max-width: 30rem;
  color: var(--text-dim);
  font-size: 1.15rem;
  line-height: 1.55;
  margin-bottom: 2rem;
}
.inline {
  color: var(--accent-2);
  border-bottom: 1px solid color-mix(in oklab, var(--accent) 50%, transparent);
  padding-bottom: 1px;
}
.inline:hover { color: var(--text); }

.install {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.6rem 0.6rem 0.6rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.92rem;
  margin-bottom: 1rem;
}
.install .prompt { color: var(--text-mute); user-select: none; }
.copy {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-dim);
  border-radius: 5px;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: var(--sans);
  transition: all .15s;
}
.copy:hover { border-color: var(--accent); color: var(--accent-2); }
.hero-sub { color: var(--text-mute); font-size: 0.95rem; }

/* ---- sections ---- */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
  border-top: 1px solid var(--line);
}
.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.9rem;
}
.section h2 {
  font-size: clamp(1.6rem, 4.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.section p { color: var(--text-dim); margin-bottom: 1.25rem; }
.section p strong, .tenets strong { color: var(--text); font-weight: 600; }

.shot {
  margin-top: 1.5rem;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 10px;
  background:
    repeating-linear-gradient(45deg, var(--bg-soft) 0 12px, transparent 12px 24px);
  display: grid;
  place-items: center;
  color: var(--text-mute);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.tenets { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.tenets li {
  border-left: 2px solid var(--line);
  padding-left: 1rem;
  color: var(--text-dim);
}
.tenets li:hover { border-left-color: var(--accent); }

/* ---- footer ---- */
.foot {
  border-top: 1px solid var(--line);
  max-width: 1100px;
  margin: 2rem auto 0;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-mute);
}
.foot-row { display: flex; gap: 0.75rem; align-items: baseline; }
.foot-brand { color: var(--text-dim); font-weight: 700; }
.foot-links { display: flex; gap: 1.25rem; }
.foot-links a:hover { color: var(--text-dim); }

/* ---- responsive ---- */
@media (max-width: 640px) {
  .main-logo { width: 70vw; }
  .snap-section { padding: 3rem 1.25rem; }
  .foot { flex-direction: column; gap: 1rem; align-items: flex-start; }
  .install { font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}