/* ============================================================
   QUANTIZE — base.css
   Reset, design tokens, typography, buttons, nav
   ============================================================ */

/* ===== RESET ===== */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

img,
picture,
video,
svg { display: block; max-width: 100%; }

input,
button,
textarea,
select { font: inherit; color: inherit; }

button { background: none; border: none; cursor: pointer; }

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

ul,
ol { list-style: none; }

/* ===== TOKENS ===== */
:root {
  /* qz-color-audit: allow-start design-token-primitives
     These are the only authored UI color literals in the production CSS.
     The Studio writes the ten public primitives below; every page-facing
     semantic token derives from them. `--tone-black` is a mixing anchor,
     never painted directly. */
  /* color */
  --bg: #0e1018;
  --bg-raised: #171923;
  --bg-raised-hover: #1c1f2c;
  --text-heading: #f5f6fa;
  --text-body: #a8adbf;
  --text-dim: #767b8f;
  --accent: #6b6ff0;
  --accent-hover: #8286f5;
  --border: rgba(245, 246, 250, 0.08);
  --border-strong: rgba(245, 246, 250, 0.16);
  --tone-black: #000000;
  /* v6 chapter arc: gold = the "your value" signal. --gold reads on dark
     surfaces; --gold-deep is the paper-surface variant (luminous gold fails
     contrast on light grounds). */
  --gold: #e2b23e;
  --gold-deep: #8a6a1c;
  /* qz-color-audit: allow-end design-token-primitives */

  /* semantic page roles — do not add literals below this line */
  --surface-page: var(--bg);
  --surface-raised: var(--bg-raised);
  --surface-raised-hover: var(--bg-raised-hover);
  --surface-subtle: color-mix(in srgb, var(--bg-raised) 74%, var(--bg) 26%);
  --surface-cinematic: color-mix(in srgb, var(--bg) 72%, var(--tone-black));
  --surface-band-start: color-mix(in srgb, var(--bg-raised) 98.5%, var(--text-heading) 1.5%);
  --surface-band-end: color-mix(in srgb, var(--bg-raised) 90%, var(--tone-black));
  --surface-inverse: var(--text-heading);
  --surface-inverse-raised: color-mix(in srgb, var(--text-heading) 94%, var(--text-body) 6%);

  --content-heading: var(--text-heading);
  --content-body: var(--text-body);
  --content-muted: var(--text-dim);
  --content-inverse-heading: var(--bg);
  --content-inverse-body: color-mix(in srgb, var(--bg) 76%, var(--text-heading) 24%);

  --interactive-accent: var(--accent);
  --interactive-accent-hover: var(--accent-hover);
  --interactive-on-accent: var(--bg);
  --interactive-soft: color-mix(in srgb, var(--accent) 14%, transparent);
  --interactive-soft-hover: color-mix(in srgb, var(--accent) 24%, transparent);
  --interactive-positive: color-mix(in srgb, var(--accent) 62%, var(--text-heading) 38%);
  --interactive-negative: color-mix(in srgb, var(--accent) 54%, var(--text-body) 46%);

  --stroke-quiet: var(--border);
  --stroke-strong: var(--border-strong);
  --stroke-inverse: color-mix(in srgb, var(--bg) 16%, transparent);
  --shadow-color: color-mix(in srgb, var(--tone-black) 48%, transparent);
  --shadow-accent: color-mix(in srgb, var(--accent) 34%, transparent);
  --scrim-page: color-mix(in srgb, var(--bg) 62%, transparent);
  --scrim-strong: color-mix(in srgb, var(--bg) 88%, transparent);

  /* legacy alias retained for old components; it is now live, not a frozen
     rgba value, so the Studio accent wheel updates every soft accent state. */
  --accent-soft: var(--interactive-soft);

  /* shape */
  --radius-card: 1rem;
  --radius-pill: 999rem;

  /* layout */
  --container: 75rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-pad: clamp(5.25rem, 9vw, 8.5rem);
  --nav-height: 4.5rem;

  /* type */
  --font-stack: -apple-system, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
}

/* ===== BASE / TYPOGRAPHY ===== */
body {
  min-height: 100vh;
  background: var(--surface-page);
  color: var(--content-body);
  font-family: var(--font-stack);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--interactive-accent);
  color: var(--interactive-on-accent);
}

h1,
h2,
h3 {
  color: var(--content-heading);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.75rem, 6vw, 4.75rem);
  font-weight: 300;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 350;
  max-width: 21em;
}

h3 {
  font-size: 1.1875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

p { max-width: 62ch; }

:focus-visible {
  outline: 2px solid var(--interactive-accent);
  outline-offset: .1875rem;
  border-radius: .25rem;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: .625rem;
  left: .625rem;
  padding: .625rem .875rem;
  border-radius: .5rem;
  background: var(--surface-inverse);
  color: var(--content-inverse-heading);
  font-weight: 650;
  transform: translateY(calc(-100% - 1.125rem));
}

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

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .875rem 1.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--interactive-accent);
  color: var(--interactive-on-accent);
}

.btn-primary:hover { background: var(--interactive-accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--content-heading);
  border: 1px solid var(--stroke-strong);
}

.btn-ghost:hover {
  border-color: var(--interactive-accent);
  color: var(--content-heading);
  background: var(--interactive-soft);
}

.btn-sm { padding: .625rem 1.25rem; font-size: 0.875rem; }

.text-link {
  display: inline-block;
  color: var(--interactive-accent);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.18s ease;
}

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

/* ===== NAV ===== */
.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}

/* solid dark state, toggled by js on scroll */
.site-nav.is-scrolled {
  background: color-mix(in srgb, var(--surface-page) 86%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--stroke-quiet);
}

.nav-inner {
  /* P3: full-bleed nav — brand + CTA anchor to the viewport edges (~32px at
     1440) while body containers stay at --container. Clamp keeps phones sane. */
  max-width: none;
  height: 100%;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 2.25vw, 2rem);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: .5625rem;
  justify-self: start;
}

.nav-glyph {
  color: var(--interactive-accent);
  font-size: 0.75rem;
  line-height: 1;
}

.nav-wordmark {
  color: var(--content-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.22em;
}

.nav-links {
  display: flex;
  gap: clamp(1.125rem, 2.4vw, 2.25rem);
}

.nav-links a {
  /* inline-flex keeps label + caret on one row (plain inline let the svg wrap under the label) */
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  white-space: nowrap;
  color: var(--content-body);
  font-size: 0.9375rem;
  font-weight: 450;
  transition: color 0.18s ease;
}

.nav-links a:hover { color: var(--content-heading); }

/* dropdown chevrons (all primary links except Pricing carry an inline .nav-caret svg) */
.nav-caret {
  flex: 0 0 auto;
  margin-top: 1px;
  opacity: 0.6;
}

.nav-actions {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 1.375rem;
}

.nav-login {
  color: var(--content-body);
  font-size: 0.9375rem;
  font-weight: 450;
  transition: color 0.18s ease;
}

.nav-login:hover { color: var(--content-heading); }

/* mobile-only menu placeholder (☰) — desktop shows the full link row */
.nav-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.375rem;
  height: 2.375rem;
  border: 1px solid var(--stroke-strong);
  border-radius: .625rem;
  color: var(--content-heading);
  font-size: 1.125rem;
  line-height: 1;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.nav-menu-btn:hover {
  border-color: var(--interactive-accent);
  background: var(--interactive-soft);
}

@media (max-width: 56.25em) {
  .nav-links { display: none; }
  .site-nav.is-menu-open {
    background: var(--surface-page);
    border-bottom-color: var(--stroke-quiet);
  }
  .site-nav.is-menu-open .nav-links {
    position: absolute;
    inset: 100% 0 auto;
    display: grid;
    gap: 0;
    max-height: calc(100svh - var(--nav-height));
    overflow-y: auto;
    padding: .625rem var(--gutter) 1.125rem;
    border-bottom: 1px solid var(--stroke-quiet);
    background: var(--surface-page);
    box-shadow: 0 18px 38px var(--shadow-color);
  }
  .site-nav.is-menu-open .nav-links a {
    min-height: 3rem;
    justify-content: space-between;
    border-bottom: 1px solid var(--stroke-quiet);
    color: var(--content-heading);
  }
  body.nav-menu-open { overflow: hidden; }
  .nav-inner { grid-template-columns: auto 1fr; }
  .nav-actions { justify-self: end; }
  .nav-menu-btn { display: inline-flex; width: 44px; height: 44px; }
  .nav-actions .btn { min-height: 44px; }
}

@media (max-width: 30em) {
  /* wordmark + CTA + ☰ is the whole story at phone width — Log in would
     crowd the row into overlap */
  .nav-login { display: none; }
  .nav-actions { gap: 12px; }
}

/* ===== VERSION SWITCH (dev) ===== */
.ver-switch { position: relative; margin-right: 4px; }
.ver-btn {
  font: inherit; font-size: .75rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--content-heading) 55%, transparent);
  background: color-mix(in srgb, var(--content-heading) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--content-heading) 14%, transparent);
  border-radius: 624.9375rem;
  padding: .375rem .75rem; cursor: pointer;
}
.ver-btn:hover {
  color: var(--content-heading);
  border-color: color-mix(in srgb, var(--content-heading) 30%, transparent);
}
.ver-menu {
  position: absolute; top: calc(100% + .5rem); right: 0; min-width: 14.375rem;
  background: var(--surface-raised);
  border: 1px solid color-mix(in srgb, var(--content-heading) 12%, transparent);
  border-radius: .75rem;
  padding: .375rem; z-index: 300; box-shadow: 0 16px 48px var(--shadow-color);
}
.ver-menu a {
  display: block; padding: 9px 12px; border-radius: 8px;
  font-size: .8125rem;
  color: color-mix(in srgb, var(--content-heading) 75%, transparent);
  text-decoration: none; white-space: nowrap;
}
.ver-menu a:hover {
  background: color-mix(in srgb, var(--content-heading) 7%, transparent);
  color: var(--content-heading);
}
@media (max-width: 56.25em) { .ver-switch { display: none; } }

/* ===== DEVICE PREVIEW LAUNCHER (localhost only; revealed by JS) ===== */
.device-preview-launch {
  position: fixed;
  right: 1.125rem;
  bottom: 1.125rem;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: .5625rem;
  min-height: 2.375rem;
  padding: 0 .9375rem;
  border: 1px solid color-mix(in srgb, var(--content-heading) 16%, transparent);
  border-radius: 62.4375rem;
  background: color-mix(in srgb, var(--surface-page) 88%, transparent);
  box-shadow: 0 12px 36px color-mix(in srgb, var(--tone-black) 32%, transparent);
  color: color-mix(in srgb, var(--content-heading) 82%, transparent);
  font-size: .6875rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.device-preview-launch[hidden] { display: none; }
.device-preview-launch:hover {
  border-color: color-mix(in srgb, var(--interactive-accent-hover) 70%, transparent);
  color: var(--content-heading);
  transform: translateY(-2px);
}

.device-preview-launch-dot {
  width: .4375rem;
  height: .4375rem;
  border-radius: 50%;
  background: var(--interactive-accent-hover);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--interactive-accent-hover) 13%, transparent);
}

@media (max-width: 30em) {
  .device-preview-launch { right: 12px; bottom: 12px; }
}