/* Reticle — marketing site styles.
 * Vanilla CSS, no dependencies. Light/dark via CSS custom properties:
 * :root holds light tokens, [data-theme="dark"] overrides, and an inline
 * script in index.html resolves system preference + localStorage before
 * first paint (no flash).
 */

/* ---------- tokens ---------- */

:root {
  --bg-0: #f7f8fb;          /* page */
  --bg-1: #ffffff;          /* cards */
  --bg-2: #eef1f6;          /* wells, code */
  --bg-inset: #0d1017;      /* always-dark showcase panels */
  --text-0: #10141d;
  --text-1: #3c4354;
  --text-2: #6b7589;
  --stroke: #dfe3ec;
  --stroke-strong: #c9cfdc;
  --accent: #3d6bff;
  --accent-strong: #2f56d6;
  --accent-soft: rgba(61, 107, 255, 0.09);
  --ok: #1faa6c;
  --err: #e5484d;
  --warn: #dfa412;
  --shadow-1: 0 1px 2px rgba(16, 20, 29, 0.05), 0 8px 24px -12px rgba(16, 20, 29, 0.18);
  --shadow-2: 0 2px 6px rgba(16, 20, 29, 0.07), 0 24px 48px -24px rgba(16, 20, 29, 0.25);
  --radius: 12px;
  --radius-lg: 18px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, "Cascadia Code", monospace;
  --wrap: 1080px;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg-0: #0b0e14;
  --bg-1: #11151d;
  --bg-2: #171c26;
  --bg-inset: #0d1017;
  --text-0: #eef1f7;
  --text-1: #c3c9d6;
  --text-2: #848ea3;
  --stroke: #232936;
  --stroke-strong: #313949;
  --accent: #5b8cff;
  --accent-strong: #7da3ff;
  --accent-soft: rgba(91, 140, 255, 0.12);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px -12px rgba(0, 0, 0, 0.6);
  --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.45), 0 24px 48px -24px rgba(0, 0, 0, 0.7);
  color-scheme: dark;
}

/* ---------- base ---------- */

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

html { scroll-behavior: smooth; }

body {
  font: 16px/1.6 var(--font-sans);
  background: var(--bg-0);
  color: var(--text-0);
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }

code, pre { font-family: var(--font-mono); }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 88px 0; }

.kicker {
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}

h1 {
  font-size: clamp(34px, 5.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 750;
}
h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
}
h3 { font-size: 17px; font-weight: 650; letter-spacing: -0.01em; }

.lede {
  font-size: clamp(17px, 2vw, 19px);
  color: var(--text-1);
  max-width: 620px;
  margin-top: 18px;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 600 15px/1 var(--font-sans);
  padding: 13px 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-1);
}
.btn-primary:hover { background: var(--accent-strong); color: #fff; transform: translateY(-1px); }
.btn-ghost {
  background: var(--bg-1);
  color: var(--text-0);
  border-color: var(--stroke-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-small { padding: 9px 16px; font-size: 13.5px; }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-0) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--stroke);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 62px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font: 700 17px var(--font-sans);
  letter-spacing: -0.01em;
  color: var(--text-0);
}
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: radial-gradient(circle at 30% 30%, var(--accent), var(--accent-strong));
  position: relative;
  flex: 0 0 auto;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1.7px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
}
.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14px;
  font-weight: 550;
}
.nav-links a { color: var(--text-1); }
.nav-links a:hover { color: var(--text-0); }
.nav-spacer { flex: 1; }

.theme-toggle {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  border: 1px solid var(--stroke);
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 15px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- hero ---------- */

.hero { padding: 96px 0 72px; overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 56px;
  align-items: center;
}
.hero-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.pill {
  font: 600 12px/1 var(--font-mono);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--bg-1);
  color: var(--text-2);
}
.pill.accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: var(--accent-soft); }
.hero-ctas { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero-note { margin-top: 14px; font-size: 13px; color: var(--text-2); }
.hero-note code { font-size: 12px; background: var(--bg-2); padding: 2px 6px; border-radius: 5px; }

/* Hero canvas mock — always dark, like the product */
.canvas-mock {
  background: var(--bg-inset);
  border: 1px solid #232936;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  padding: 10px;
  position: relative;
}
.canvas-mock svg { display: block; width: 100%; height: auto; border-radius: 10px; }

/* ---------- alive section ---------- */

.section-head { max-width: 640px; margin-bottom: 48px; }
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--bg-1);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-1);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card p { font-size: 14.5px; color: var(--text-1); }
.card-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 17px;
}

.mini-mock {
  margin-top: auto;
  background: var(--bg-inset);
  border: 1px solid #232936;
  border-radius: 10px;
  padding: 12px 14px;
  font: 11.5px/1.7 var(--font-mono);
  color: #c3c9d6;
  overflow-x: auto;
}
.mini-mock .cm { color: #5c667c; }
.mini-mock .ok { color: #2ec27e; }
.mini-mock .err { color: #ff6b70; }
.mini-mock .k { color: #7aa2f7; }
.mini-mock .s { color: #e0af68; }
.health-formula { white-space: pre; }

/* ---------- features grid ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.feature {
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: var(--bg-1);
}
.feature h3 { margin-bottom: 6px; font-size: 15px; }
.feature p { font-size: 13.5px; color: var(--text-2); }

/* ---------- pricing / product split ---------- */

.plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.plan {
  background: var(--bg-1);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 34px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: var(--shadow-1);
}
.plan.featured {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--stroke));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 35%, transparent), var(--shadow-2);
  position: relative;
}
.plan-tag {
  position: absolute;
  top: -12px;
  left: 30px;
  font: 700 11px/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  padding: 6px 12px;
  border-radius: 999px;
}
.plan-name { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; }
.plan-price { font-size: 15px; color: var(--text-1); }
.plan-price strong { color: var(--text-0); font-size: 17px; }
.plan ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-1);
}
.plan li { padding-left: 26px; position: relative; }
.plan li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--ok);
  font-weight: 700;
}
.plan-cta { margin-top: auto; padding-top: 8px; }
.plan-cta .btn { width: 100%; justify-content: center; }
.plan-fineprint { font-size: 12.5px; color: var(--text-2); }

/* ---------- demos / resources ---------- */

.stub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.stub {
  border: 1.5px dashed var(--stroke-strong);
  border-radius: var(--radius);
  padding: 22px;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-2);
  background: transparent;
  transition: border-color 0.15s ease;
}
.stub:hover { border-color: var(--accent); }
.stub h3 { color: var(--text-1); font-size: 14.5px; }
.stub p { font-size: 12.5px; }
.stub .soon {
  margin-top: auto;
  font: 600 11px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warn);
}

/* ---------- faq ---------- */

.faq { max-width: 720px; }
.faq details {
  border-bottom: 1px solid var(--stroke);
  padding: 18px 0;
}
.faq summary {
  font-weight: 620;
  font-size: 15.5px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--text-2); font-size: 19px; transition: transform 0.15s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: 10px; font-size: 14.5px; color: var(--text-1); max-width: 640px; }

/* ---------- final cta ---------- */

.cta-panel {
  background: linear-gradient(135deg, var(--accent-soft), transparent 60%), var(--bg-1);
  border: 1px solid var(--stroke);
  border-radius: 22px;
  padding: 56px;
  text-align: center;
  box-shadow: var(--shadow-1);
}
.cta-panel .lede { margin: 14px auto 0; }
.cta-panel .hero-ctas { justify-content: center; }

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--stroke);
  padding: 36px 0 48px;
  font-size: 13.5px;
  color: var(--text-2);
}
.footer-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-inner .spacer { flex: 1; }
.footer-inner a { color: var(--text-2); }
.footer-inner a:hover { color: var(--text-0); }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .cards-3, .features { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; }
  .stub-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .cta-panel { padding: 36px 24px; }
}
@media (max-width: 520px) {
  .stub-grid { grid-template-columns: 1fr; }
}