/* ───────────────────────────── tokens ───────────────────────────── */ :root { /* surface palette (theme-aware; default = dark) */ --bg-deep: #0B0D10; --bg-elev: #14171D; --bg-paper: #161B22; --bg-paper-2: #1C2128; /* text (theme-aware) */ --fg: #E6EDF3; --fg-soft: #C9D1D9; --fg-muted: #8B949E; --fg-dim: #6E7681; /* rules / borders (theme-aware) */ --rule: #30363D; --rule-soft: #21262D; --rule-strong: #484F58; /* small tint overlays for hovers / subtle elevation. Inverted in light. */ --tint-1: rgba(255,255,255,0.02); --tint-2: rgba(255,255,255,0.05); --tint-strong: rgba(255,255,255,0.06); --shadow-card: 0 24px 60px -28px rgba(0,0,0,0.55); /* the wordmark "fl" + "o" letters (theme-aware fill) */ --wm-letter: #F5F6FA; /* ALWAYS-DARK code/terminal surface — does not flip in light mode */ --code-bg: #14171D; --code-bg-elev: #1C2128; --code-chrome: rgba(255,255,255,0.02); --code-fg: #E6EDF3; --code-fg-soft: #C9D1D9; --code-fg-muted: #8B949E; --code-fg-dim: #6E7681; --code-rule: #30363D; --code-rule-soft:#21262D; /* Wave gradient — theme-aware. Stops darken in light mode for readable contrast on white. The wordmark and other accents pick these up so the brand stays consistent across themes. */ --grad-1: #0AEAA8; --grad-2: #0ADCCE; --grad-3: #198FFF; --gradient: linear-gradient(90deg, var(--grad-1) 0%, var(--grad-2) 55%, var(--grad-3) 100%); --gradient-soft: linear-gradient(90deg, rgba(10,234,168,0.08) 0%, rgba(10,220,206,0.08) 55%, rgba(25,143,255,0.08) 100%); /* ALWAYS-BRIGHT accents — for use inside always-dark surfaces (terminal frames, diagrams) where the theme-aware --grad-* would go invisible if it darkened in light mode. */ --code-accent-1: #0AEAA8; --code-accent-2: #0ADCCE; /* terminal sigils */ --term-red: #FF5F56; --term-amber: #FFBD2E; --term-green: #27C93F; /* typography */ --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace; --font-serif: Charter, "Iowan Old Style", "Source Serif Pro", Georgia, serif; --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif; /* shape */ --r-sm: 6px; --r-md: 10px; --r-lg: 14px; /* layout */ --maxw: 1100px; } /* ───────────────────────────── light theme override ───────────────────────────── Drives the swap via two paths so it's robust against browser overrides and stale caches: (1) html[data-theme="light"] is set synchronously by the inline script in ; (2) the @media block is a no-JS fallback. Both share the same variable values. */ :where(html[data-theme="light"]) { --bg-deep: #FFFFFF; --bg-elev: #F6F8FA; --bg-paper: #F6F8FA; --bg-paper-2: #FFFFFF; --fg: #1F2328; --fg-soft: #32383F; --fg-muted: #57606A; --fg-dim: #8C959F; --rule: #D0D7DE; --rule-soft: #E1E4E8; --rule-strong: #AFB8C1; --tint-1: rgba(0,0,0,0.025); --tint-2: rgba(0,0,0,0.05); --tint-strong: rgba(0,0,0,0.07); --shadow-card: 0 18px 44px -22px rgba(15,20,30,0.18); --wm-letter: #1F2328; /* Wave gradient stays its original bright mint → teal → blue in both themes (per user direction). --grad-* tokens are not overridden here. */ } @media (prefers-color-scheme: light) { html:not([data-theme="dark"]) { --bg-deep: #FFFFFF; --bg-elev: #F6F8FA; --bg-paper: #F6F8FA; --bg-paper-2: #FFFFFF; --fg: #1F2328; --fg-soft: #32383F; --fg-muted: #57606A; --fg-dim: #8C959F; --rule: #D0D7DE; --rule-soft: #E1E4E8; --rule-strong: #AFB8C1; --tint-1: rgba(0,0,0,0.025); --tint-2: rgba(0,0,0,0.05); --tint-strong: rgba(0,0,0,0.07); --shadow-card: 0 18px 44px -22px rgba(15,20,30,0.18); --wm-letter: #1F2328; } } * { box-sizing: border-box; } html, body { margin: 0; padding: 0; background: var(--bg-deep); color: var(--fg); font-family: var(--font-sans); font-size: 16px; line-height: 1.55; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; } img, svg, video { display: block; max-width: 100%; } a { color: var(--fg); text-decoration: none; border-bottom: 1px dotted var(--rule); transition: color .12s ease, border-color .12s ease; } /* Buttons own their own hover styles — exclude them from the generic link hover so the gradient text color doesn't bleed in and ruin contrast. */ a:not(.btn):hover { color: var(--grad-2); border-bottom-color: var(--grad-2); } a:focus-visible { outline: 2px solid var(--grad-2); outline-offset: 3px; border-radius: 2px; } code, .mono { font-family: var(--font-mono); font-size: 0.92em; color: var(--fg-soft); background: var(--tint-2); border: 1px solid var(--rule-soft); border-radius: 4px; padding: 0.05em 0.4em; } /* inside 
 is a multi-line inline element — every line fragment
   draws its own border in some browsers, producing the per-line "underline"
   effect (visible on light bg). Reset to a transparent pass-through. */
pre code {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  padding: 0;
  border-radius: 0;
}

::selection { background: rgba(10, 220, 206, 0.30); color: var(--fg); }

/* ───────────────────────────── helpers ───────────────────────────── */
.grad-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}

.kw {
  font-family: var(--font-mono);
  font-size: 0.95em;
  white-space: nowrap;
}

.strike {
  color: var(--fg-muted);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  text-decoration-color: var(--rule-strong);
  margin-right: 0.25em;
}

/* ───────────────────────────── hero ───────────────────────────── */
.hero {
  position: relative;
  border-bottom: 1px solid var(--rule-soft);
  background:
    radial-gradient(1200px 600px at 50% -200px, rgba(10,220,206,0.10), transparent 60%),
    var(--bg-deep);
  overflow: hidden;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}
.dot--red    { background: var(--term-red); }
.dot--amber  { background: var(--term-amber); }
.dot--green  { background: var(--term-green); }

.hero__inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(72px, 11vw, 140px) 22px clamp(50px, 8vw, 90px);
  z-index: 1;
  text-align: center;
}

.wordmark {
  margin: 0 auto 28px;
  max-width: 440px;
}
.wordmark svg { width: 100%; height: auto; display: block; }
.wm-letter { fill: var(--wm-letter); }
/* Wordmark gradient stops — CSS-driven so the wave adapts (bright in dark
   mode, darker / readable in light mode) via --grad-* tokens. */
.wm-s1 { stop-color: var(--grad-1); }
.wm-s2 { stop-color: var(--grad-2); }
.wm-s3 { stop-color: var(--grad-3); }

.hero__tagline {
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.35;
  color: var(--fg-soft);
  font-weight: 400;
  letter-spacing: -0.005em;
}

.hero__prompt {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.6vw, 17px);
  color: var(--fg-muted);
  margin: 0 0 36px;
  letter-spacing: 0;
}
.prompt-sigil {
  color: var(--grad-1);
  margin-right: 0.7em;
  font-weight: 700;
}
.typed {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.caret {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  margin-left: 4px;
  vertical-align: -0.13em;
  background: var(--grad-2);
  animation: blink 1.05s steps(2, jump-none) infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 11px 18px;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule);
  background: var(--tint-1);
  color: var(--fg);
  transition: background .15s ease, border-color .15s ease, transform .08s ease;
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--rule-strong);
  background: var(--tint-2);
  color: var(--fg); /* override the generic a:hover gradient color, keep readable contrast */
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--bg-deep), var(--bg-deep)) padding-box,
    var(--gradient) border-box;
  position: relative;
}
.btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-sm);
  background: var(--gradient);
  opacity: 0.08;
  pointer-events: none;
  z-index: -1;
}
.btn--primary:hover {
  background:
    linear-gradient(var(--tint-2), var(--tint-2)) padding-box,
    var(--gradient) border-box;
}

.btn--ghost { border-color: var(--rule-soft); }
.btn--icon { padding: 11px 12px; }

.hero__glow {
  position: absolute;
  pointer-events: none;
  inset: auto auto -200px -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(closest-side, rgba(25,143,255,0.10), transparent 70%);
  z-index: 0;
}

/* ───────────────────────────── section heads ───────────────────────────── */
.section__head {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 80px 22px 32px;
}
.section__head--terminal { text-align: left; }

.section__title {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.section__lede {
  max-width: 720px;
  margin: 0;
  color: var(--fg-soft);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.55;
}

/* ───────────────────────────── demo / acts ───────────────────────────── */
.demo {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--rule-soft);
  padding-bottom: 80px;
}

.acts {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
  list-style: none;
  display: grid;
  gap: 56px;
}

.act {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 40px;
  align-items: center;
  padding-left: 28px;
  position: relative;
}
.act::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 2px;
  background: var(--gradient);
  opacity: 0.6;
}
.act--punchline::before { opacity: 1; width: 4px; }

.act:nth-child(even) {
  grid-template-columns: 1.25fr 1fr;
}
.act:nth-child(even) .act__caption { order: 2; }
.act:nth-child(even) .act__media { order: 1; }

.act__caption { color: var(--fg-soft); }

.act__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grad-1);
  margin: 0 0 10px;
  letter-spacing: 0.06em;
}
.act__num-tag { color: var(--fg-muted); }

.act__title {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 28px);
  margin: 0 0 14px;
  line-height: 1.25;
  color: var(--fg);
  letter-spacing: -0.005em;
}

.act__body {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-soft);
}
.act__body em { color: var(--fg); font-style: italic; }

.act__sting {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--rule-soft);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.55;
}

.act__media { margin: 0; }

/* terminal frame around videos / code — intentionally stays dark in both themes */
.terminal-frame {
  border: 1px solid var(--code-rule);
  border-radius: var(--r-md);
  background: var(--code-bg);
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.04) inset,
    0 24px 48px -24px rgba(0,0,0,0.6);
}
.terminal-frame__chrome {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: var(--code-chrome);
  border-bottom: 1px solid var(--code-rule-soft);
}
.terminal-frame__title {
  margin-left: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--code-fg-muted);
}
.demo-video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

.terminal-frame--code {
  margin-top: 18px;
}

/* ───────────────────────────── brief sections ───────────────────────────── */
.brief {
  background: var(--bg-paper);
  border-bottom: 1px solid var(--rule-soft);
  padding: 80px 22px;
}
.brief--alt { background: var(--bg-elev); }

.brief__sheet {
  max-width: 780px;
  margin: 0 auto;
  background: var(--bg-paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

/* file-tab header (looks like an editor tab strip) */
.brief__head {
  background: var(--tint-strong);
  padding: 14px clamp(20px, 4vw, 40px) 22px;
  border-bottom: 1px solid var(--rule-soft);
  position: relative;
}
.brief__head::after {
  /* gradient hairline under the tab strip */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--gradient);
  opacity: 0.5;
}

.brief__title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.2vw, 34px);
  margin: 4px 0 0;
  color: var(--fg);
  letter-spacing: -0.01em;
  font-weight: 600;
}

/* sheet body */
.brief__sheet > .brief__section,
.brief__sheet > p.brief__byline {
  padding-left: clamp(24px, 5vw, 48px);
  padding-right: clamp(24px, 5vw, 48px);
}
.brief__sheet > .brief__section:first-of-type { padding-top: 32px; }
.brief__sheet > .brief__section:last-of-type  { padding-bottom: 8px; }

.brief__section { margin: 0 0 28px; }

.brief__h {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--grad-1);
  margin: 0 0 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.brief__h::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--gradient);
  border-radius: 1px;
}

.brief__section p {
  font-family: var(--font-serif);
  font-size: 17.5px;
  line-height: 1.7;
  color: var(--fg-soft);
  margin: 0 0 14px;
}
.brief__section p:last-child { margin-bottom: 0; }
.brief__section p em { color: var(--fg); font-style: italic; }
.brief__section p strong { color: var(--fg); font-weight: 600; }

.brief__lede {
  font-size: 19px !important;
  color: var(--fg) !important;
  font-family: var(--font-serif) !important;
}

.brief__checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.brief__checks li {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--fg-soft);
  position: relative;
  padding-left: 30px;
  line-height: 1.55;
}
.brief__checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  color: var(--grad-1);
  font-weight: 700;
  font-size: 16px;
}

.brief__byline {
  margin: 8px 0 0 !important;
  padding-top: 22px;
  padding-bottom: 32px;
  border-top: 1px dashed var(--rule-soft);
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--fg-muted);
  font-size: 15.5px;
  line-height: 1.6;
}

/* card grid inside brief sheet */
.brief__section--grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  background: var(--tint-1);
  border: 1px solid var(--rule-soft);
  border-radius: var(--r-md);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  margin: 0;
  font-weight: 600;
}
.card__bullet {
  font-size: 9px;
  color: var(--grad-1);
  line-height: 1;
}
.card__tag {
  margin-left: auto;
  font-size: 9.5px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  padding: 2px 6px;
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
}
.card p {
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0;
}
.card code {
  font-size: 0.88em;
}

/* ───────────────────────────── diagrams (svg) ──────────────────────────────
   Diagrams are always dark — they sit inside a brief sheet (which flips in
   light mode), but the diagram itself is a "code-like" visualization, so it
   stays a dark panel in both themes. */
.diagram {
  margin: 32px 0 18px;
  text-align: center;
  padding: 18px;
  background: var(--code-bg);
  border: 1px solid var(--code-rule-soft);
  border-radius: var(--r-md);
}
.diagram__svg {
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
  display: block;
}
.diagram__caption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--code-fg-muted);
  margin-top: 14px;
  letter-spacing: 0.04em;
}

.d1-h, .d2-h {
  fill: var(--code-fg);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
}
.d1-sub, .d2-sub {
  fill: var(--code-fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}
.d1-edge, .d2-edge {
  fill: var(--code-fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
}
/* Inside the always-dark diagram panel — must stay bright in light mode too. */
.d1-edge--accent, .d2-edge--accent { fill: var(--code-accent-2); font-weight: 600; }
.d1-edge--muted,  .d2-edge--muted  { fill: var(--code-fg-dim); font-style: italic; }

/* ───────────────────────────── install ───────────────────────────── */
.install {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--rule-soft);
  padding-bottom: 80px;
}
.install .section__head { max-width: 780px; }

.install__primary {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 22px;
}
.install__caption {
  margin: 18px 4px 0;
  color: var(--fg-soft);
  font-size: 15.5px;
  line-height: 1.65;
}
.install__manual {
  max-width: 780px;
  margin: 28px auto 0;
  padding: 0 22px;
}
.install__manual summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
  padding: 12px 14px;
  border: 1px dashed var(--rule-soft);
  border-radius: var(--r-sm);
  user-select: none;
  transition: color .12s, border-color .12s;
}
.install__manual summary:hover { color: var(--fg); border-color: var(--rule); }
.install__manual[open] summary { color: var(--fg); border-color: var(--rule); margin-bottom: 14px; }

.codeblock {
  margin: 0;
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--code-fg-soft);
  background: transparent;
  overflow-x: auto;
  white-space: pre;
}

/* copy button (sits in the always-dark terminal chrome strip) */
.copy-btn {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--code-fg-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--code-rule-soft);
  border-radius: 4px;
  padding: 4px 9px;
  cursor: pointer;
  transition: color .12s ease, border-color .12s ease, background .12s ease;
  user-select: none;
}
.copy-btn:hover {
  color: var(--code-fg);
  border-color: var(--code-rule);
  background: rgba(255,255,255,0.06);
}
.copy-btn:focus-visible {
  outline: 2px solid var(--grad-2);
  outline-offset: 2px;
}
.copy-btn__icon {
  width: 13px;
  height: 13px;
  flex: 0 0 13px;
}
.copy-btn__icon--check { display: none; }

.copy-btn.is-copied {
  /* Inside an always-dark terminal chrome strip — always-bright accent. */
  color: var(--code-accent-1);
  border-color: rgba(10,234,168,0.45);
  background: rgba(10,234,168,0.08);
}
.copy-btn.is-copied .copy-btn__icon--copy  { display: none; }
.copy-btn.is-copied .copy-btn__icon--check { display: inline-block; }
.codeblock__prompt {
  /* Inside an always-dark terminal frame — use the always-bright accent so
     it stays visible regardless of theme. */
  color: var(--code-accent-1);
  font-weight: 700;
  margin-right: 0.7em;
}
.codeblock__comment {
  color: var(--code-fg-dim);
  font-style: italic;
}

/* ───────────────────────────── footer ───────────────────────────── */
.footer {
  background: var(--bg-deep);
  padding: 60px 22px 40px;
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.footer__brand { display: flex; flex-direction: column; gap: 12px; }
.footer__wordmark { width: 140px; height: auto; }
.footer__tagline {
  margin: 0;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.footer__links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
}
.footer__links a {
  font-family: var(--font-mono);
  font-size: 13px;
  border-bottom: none;
  color: var(--fg-muted);
}
.footer__links a:hover { color: var(--grad-2); }

.footer__legal {
  grid-column: 1 / -1;
  margin: 12px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
}
.footer__legal a {
  border-bottom: none;
  color: var(--fg-muted);
}

/* ───────────────────────────── responsive ───────────────────────────── */
@media (max-width: 820px) {
  .act,
  .act:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .act:nth-child(even) .act__caption { order: 1; }
  .act:nth-child(even) .act__media { order: 2; }

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

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

/* ───────────────────────────── reduced motion ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; opacity: 0.6; }
  .demo-video {
    /* JS handles disabling autoplay; CSS hint for fallback */
  }
  * { scroll-behavior: auto !important; }
}

html { scroll-behavior: smooth; }