/* ============================================================
   Codebrief — Marketing site layout
   Built entirely on the design-system tokens (var(--*)).
   Marketing-specific structure only; component look comes from DS.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface-app);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---- Layout primitives ----------------------------------- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 920px; }
section { position: relative; }
.band { padding: clamp(72px, 9vw, 116px) 0; }
.band--paper  { background: var(--surface-app); }
.band--white  { background: var(--surface-card); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.band--sunken { background: var(--surface-sunken); }
.band--ink    { background: var(--surface-inverse); color: var(--text-on-inverse); }

/* ---- Type helpers ---------------------------------------- */
.eyebrow {
  font-family: var(--font-ui); font-size: var(--text-2xs); font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--citation);
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 var(--space-4);
}
.eyebrow--muted { color: var(--text-muted); }
.eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; opacity: .5; }
.display {
  font-family: var(--font-serif); font-weight: var(--weight-semibold);
  font-size: clamp(2.4rem, 5.2vw, var(--text-display)); line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight); margin: 0; text-wrap: balance;
}
.h2 {
  font-family: var(--font-serif); font-weight: var(--weight-semibold);
  font-size: clamp(1.9rem, 3.4vw, var(--text-h1)); line-height: var(--leading-tight);
  letter-spacing: -0.015em; margin: 0; text-wrap: balance;
}
.h3 { font-family: var(--font-serif); font-weight: var(--weight-semibold); font-size: var(--text-h3); line-height: var(--leading-snug); margin: 0; letter-spacing: -0.01em; }
.lead { font-size: var(--text-lg); line-height: var(--leading-relaxed); color: var(--text-secondary); margin: 0; text-wrap: pretty; }
.muted { color: var(--text-muted); }
.gold { color: var(--citation); }
.serif { font-family: var(--font-serif); }
.mono { font-family: var(--font-code); }
.section-head { max-width: 64ch; }
.section-head--center { margin: 0 auto; text-align: center; }
.section-head .lead { margin-top: var(--space-4); }

/* ---- Nav ------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface-app) 86%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.nav--scrolled { border-bottom-color: var(--border-subtle); background: color-mix(in srgb, var(--surface-app) 94%, transparent); }
.nav__inner { display: flex; align-items: center; gap: var(--space-8); height: 76px; }
.nav__logo { height: 38px; width: auto; }
.nav__links { display: flex; align-items: center; gap: var(--space-6); margin-left: auto; }
.nav__link { font-size: var(--text-sm); font-weight: var(--weight-medium); color: var(--text-secondary); transition: color var(--dur-fast) var(--ease-out); }
.nav__link:hover { color: var(--text-primary); }
.nav__cta { display: flex; align-items: center; gap: var(--space-3); }
@media (max-width: 860px) { .nav__links .nav__link { display: none; } }

/* ---- Hero ------------------------------------------------ */
.hero { padding-top: clamp(48px, 7vw, 88px); padding-bottom: clamp(56px, 8vw, 104px); overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero__copy { max-width: 33rem; }
.hero__sub { margin-top: var(--space-5); max-width: 40ch; }
.hero__cta { display: flex; align-items: center; gap: var(--space-3); margin-top: var(--space-8); flex-wrap: wrap; }
.hero__note { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-4); font-size: var(--text-sm); color: var(--text-muted); }
.hero__note svg { color: var(--success); }

/* centered variant */
.hero--center .hero__grid { grid-template-columns: 1fr; text-align: center; }
.hero--center .hero__copy { max-width: 46rem; margin: 0 auto; }
.hero--center .hero__sub { margin-left: auto; margin-right: auto; }
.hero--center .hero__cta { justify-content: center; }
.hero--center .hero__demo { margin: clamp(40px,6vw,64px) auto 0; max-width: 760px; width: 100%; }

/* document variant */
.hero--doc .hero__grid { grid-template-columns: 1fr 1fr; align-items: stretch; }
.hero--doc .display { font-size: clamp(2.6rem, 5.6vw, 4rem); }
.hero--doc .hero__copy { align-self: center; }

@media (max-width: 880px) {
  .hero__grid, .hero--doc .hero__grid { grid-template-columns: 1fr; }
  .hero__copy { max-width: 38rem; }
  .hero__demo { margin-top: var(--space-4); }
}

/* ---- Waitlist inline form -------------------------------- */
.waitlist { display: flex; gap: var(--space-2); max-width: 440px; margin-top: var(--space-8); }
.hero--center .waitlist, .cta .waitlist { margin-left: auto; margin-right: auto; }
.waitlist__field {
  flex: 1; min-width: 0; height: 46px; padding: 0 var(--space-4);
  font-family: var(--font-ui); font-size: var(--text-base); color: var(--text-primary);
  background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.waitlist__field::placeholder { color: var(--text-muted); }
.waitlist__field:focus { outline: none; border-color: var(--primary); box-shadow: var(--ring-focus); }
.waitlist__ok { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-8); color: var(--success); font-weight: var(--weight-medium); font-size: var(--text-base); }
.band--ink .waitlist__field { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.18); color: #fff; }
.band--ink .waitlist__field::placeholder { color: rgba(255,255,255,.5); }

/* ---- Demo (live cited answer) ---------------------------- */
.demo {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); overflow: hidden;
}
.demo__bar { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--border-subtle); background: var(--surface-app); }
.demo__dotrow { display: flex; gap: 6px; margin-right: var(--space-2); }
.demo__dot { width: 10px; height: 10px; border-radius: 999px; background: var(--neutral-300); }
.demo__repo { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-code); font-size: var(--text-xs); color: var(--text-tertiary); }
.demo__repo svg { width: 13px; height: 13px; }
.demo__body { padding: var(--space-5); }
.demo__qrow { display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-4); }
.demo__q { font-family: var(--font-serif); font-size: var(--text-h4); font-weight: var(--weight-medium); letter-spacing: -0.01em; line-height: var(--leading-snug); }
.demo__caret { display: inline-block; width: 2px; height: 1.05em; background: var(--primary); margin-left: 1px; vertical-align: text-bottom; animation: blink 1s steps(2) infinite; }
@keyframes blink { 0%,50%{opacity:1} 51%,100%{opacity:0} }

.prose-answer { font-family: var(--font-serif); font-size: var(--text-lg); line-height: var(--leading-relaxed); color: var(--text-primary); }
.prose-answer p { margin: 0 0 var(--space-3); }
.prose-answer p:last-child { margin-bottom: 0; }
.prose-answer code { font-family: var(--font-code); font-size: .82em; background: var(--surface-sunken); padding: .08em .35em; border-radius: var(--radius-xs); color: var(--code-fg); }

.demo__sources { margin-top: var(--space-5); border-top: 1px solid var(--border-subtle); padding-top: var(--space-4); }
.demo__sources-h { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-2); font-size: var(--text-xs); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--text-muted); }

/* mini code peek used in features */
.codepeek { background: var(--surface-code); border: 1px solid var(--code-border); border-radius: var(--radius-md); overflow: hidden; font-family: var(--font-code); }
.codepeek__bar { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); background: var(--code-bg-deep); border-bottom: 1px solid var(--code-border); font-size: var(--text-xs); color: var(--code-fg); }
.codepeek__bar svg { width: 13px; height: 13px; color: var(--text-muted); }
.codepeek__code { margin: 0; padding: var(--space-2) 0; font-size: var(--text-xs); line-height: 1.75; overflow-x: auto; }
.codeline { display: flex; }
.codeline__n { width: 42px; flex: none; text-align: right; padding-right: var(--space-3); color: var(--code-gutter); user-select: none; }
.codeline__t { padding: 0 var(--space-4) 0 0; white-space: pre; color: var(--code-fg); }
.codeline--cited { background: var(--code-highlight-bg); box-shadow: inset 3px 0 0 var(--code-highlight-bar); }
.codeline--cited .codeline__n { color: var(--citation-hover); font-weight: 600; }
.tok-kw { color: var(--code-keyword); } .tok-str { color: var(--code-string); } .tok-com { color: var(--code-comment); font-style: italic; } .tok-fn { color: var(--code-fn); }

/* ---- Logo strip ------------------------------------------ */
.proof { display: flex; flex-direction: column; align-items: center; gap: var(--space-6); }
.proof__label { font-size: var(--text-xs); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--text-muted); font-weight: var(--weight-semibold); }
.proof__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: clamp(28px, 5vw, 56px); }
.proof__logo { display: flex; align-items: center; gap: 10px; color: var(--text-tertiary); font-weight: var(--weight-bold); font-size: 1.1rem; letter-spacing: -0.01em; opacity: .72; }
.proof__logo svg { width: 22px; height: 22px; }

/* ---- How it works (steps) -------------------------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); margin-top: clamp(40px,5vw,64px); counter-reset: step; }
.step { position: relative; }
.step__n {
  width: 38px; height: 38px; border-radius: var(--radius-pill);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: var(--text-h4); font-weight: 600;
  color: var(--primary); background: var(--primary-soft); border: 1px solid var(--primary-soft-border);
  margin-bottom: var(--space-4);
}
.step__t { font-size: var(--text-h4); font-weight: var(--weight-semibold); margin: 0 0 var(--space-2); letter-spacing: -0.01em; }
.step__d { color: var(--text-secondary); font-size: var(--text-sm); line-height: var(--leading-relaxed); margin: 0; }
.step:not(:last-child)::after {
  content: ""; position: absolute; top: 19px; left: calc(38px + var(--space-3));
  right: calc(-1 * var(--space-6) + var(--space-3)); height: 1px;
  background: repeating-linear-gradient(90deg, var(--border-default) 0 5px, transparent 5px 10px);
}
@media (max-width: 820px) { .steps { grid-template-columns: 1fr 1fr; gap: var(--space-8) var(--space-6); } .step:not(:last-child)::after { display: none; } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

/* ---- Feature: hero feature (split) ----------------------- */
.feat-hero { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px,5vw,64px); align-items: center; }
.feat-hero--flip { grid-template-columns: 1.1fr 1fr; }
.feat-hero__media { min-width: 0; }
.feat-list { display: flex; flex-direction: column; gap: var(--space-3); margin: var(--space-6) 0 0; padding: 0; list-style: none; }
.feat-list li { display: flex; gap: var(--space-3); align-items: flex-start; font-size: var(--text-base); color: var(--text-secondary); }
.feat-list svg { color: var(--citation); flex: none; margin-top: 3px; }
@media (max-width: 820px) { .feat-hero, .feat-hero--flip { grid-template-columns: 1fr; } }

/* ---- Feature grid (3-up) --------------------------------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); margin-top: clamp(40px,5vw,56px); }
.feat-card { padding: var(--space-6); height: 100%; display: flex; flex-direction: column; gap: var(--space-3); }
.feat-card__icon {
  width: 44px; height: 44px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--citation-soft); color: var(--citation); border: 1px solid var(--citation-border); margin-bottom: var(--space-2);
}
.feat-card__t { font-size: var(--text-h4); font-weight: var(--weight-semibold); letter-spacing: -0.01em; margin: 0; }
.feat-card__d { color: var(--text-secondary); font-size: var(--text-sm); line-height: var(--leading-relaxed); margin: 0; }
@media (max-width: 820px) { .feat-grid { grid-template-columns: 1fr; } }

/* ---- Trust ----------------------------------------------- */
.trust__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(36px,6vw,80px); align-items: center; }
.trust__list { display: grid; gap: var(--space-4); margin: 0; padding: 0; list-style: none; }
.trust__item { display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-4) 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.trust__item:last-child { border-bottom: 0; }
.trust__ic { width: 40px; height: 40px; border-radius: var(--radius-md); flex: none; display: flex; align-items: center; justify-content: center; background: rgba(217,172,79,.14); color: var(--gold-300); border: 1px solid rgba(217,172,79,.28); }
.trust__t { font-weight: var(--weight-semibold); font-size: var(--text-base); margin: 0 0 4px; color: #fff; }
.trust__d { font-size: var(--text-sm); line-height: var(--leading-relaxed); color: rgba(255,255,255,.62); margin: 0; }
.band--ink .eyebrow { color: var(--gold-300); }
.band--ink .display, .band--ink .h2 { color: #fff; }
.band--ink .lead { color: rgba(255,255,255,.72); }
@media (max-width: 820px) { .trust__grid { grid-template-columns: 1fr; } }

/* ---- Pricing --------------------------------------------- */
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin-top: clamp(40px,5vw,56px); max-width: 880px; margin-left: auto; margin-right: auto; }
.price { padding: var(--space-8); display: flex; flex-direction: column; }
.price--pro { border-color: var(--citation-border); box-shadow: var(--shadow-md); position: relative; }
.price__head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-2); }
.price__name { font-family: var(--font-serif); font-size: var(--text-h3); font-weight: var(--weight-semibold); }
.price__amt { display: flex; align-items: baseline; gap: 6px; margin: var(--space-3) 0 var(--space-1); }
.price__num { font-family: var(--font-serif); font-size: 2.6rem; font-weight: var(--weight-semibold); letter-spacing: -0.02em; }
.price__per { color: var(--text-muted); font-size: var(--text-sm); }
.price__tag { color: var(--text-secondary); font-size: var(--text-sm); margin: 0 0 var(--space-6); min-height: 2.6em; }
.price__list { list-style: none; margin: 0 0 var(--space-8); padding: var(--space-5) 0 0; border-top: 1px solid var(--border-subtle); display: grid; gap: var(--space-3); flex: 1; }
.price__list li { display: flex; gap: var(--space-3); align-items: flex-start; font-size: var(--text-sm); color: var(--text-secondary); }
.price__list svg { flex: none; margin-top: 2px; }
.price__list .ck { color: var(--success); }
.price__list .lk { color: var(--text-disabled); }
@media (max-width: 700px) { .price-grid { grid-template-columns: 1fr; } }

/* ---- Footer ---------------------------------------------- */
.footer { background: var(--surface-inverse); color: rgba(255,255,255,.7); padding: clamp(56px,7vw,80px) 0 var(--space-8); }
.footer__top { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-8); padding-bottom: var(--space-10); border-bottom: 1px solid rgba(255,255,255,.1); }
.footer__brand { max-width: 30ch; }
.footer__logo { height: 38px; margin-bottom: var(--space-4); }
.footer__tagline { font-size: var(--text-sm); line-height: var(--leading-relaxed); color: rgba(255,255,255,.55); margin: 0; }
.footer__col h4 { font-size: var(--text-xs); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: rgba(255,255,255,.5); margin: 0 0 var(--space-4); font-weight: var(--weight-semibold); }
.footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.footer__col a { font-size: var(--text-sm); color: rgba(255,255,255,.72); transition: color var(--dur-fast) var(--ease-out); }
.footer__col a:hover { color: #fff; }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-top: var(--space-6); font-size: var(--text-xs); color: rgba(255,255,255,.45); flex-wrap: wrap; }
.footer__legal { display: flex; gap: var(--space-5); }
@media (max-width: 760px) { .footer__top { grid-template-columns: 1fr 1fr; } .footer__brand { grid-column: 1 / -1; } }

/* ---- Hero switcher (review control) ---------------------- */
.heroswitch {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 90;
  display: flex; align-items: center; gap: var(--space-3);
  background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lg); padding: 6px 6px 6px var(--space-4);
}
.heroswitch__label { font-size: var(--text-xs); font-weight: var(--weight-semibold); color: var(--text-muted); letter-spacing: var(--tracking-wide); }
.heroswitch__seg { display: flex; gap: 2px; background: var(--surface-sunken); border-radius: var(--radius-pill); padding: 3px; }
.heroswitch__btn { border: 0; background: transparent; cursor: pointer; font-family: var(--font-ui); font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--text-secondary); width: 30px; height: 28px; border-radius: var(--radius-pill); transition: all var(--dur-fast) var(--ease-out); }
.heroswitch__btn:hover { color: var(--text-primary); }
.heroswitch__btn--on { background: var(--primary); color: #fff; }

/* ---- Scroll reveal (transform-only; content is NEVER hidden) ---- */
.reveal { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .reveal { transform: translateY(14px); transition: transform .55s var(--ease-out); will-change: transform; }
  .reveal.is-in { transform: none; }
}
.thinking-dots { display: inline-flex; gap: 4px; margin-left: 6px; vertical-align: middle; }
.thinking-dots i { width: 5px; height: 5px; border-radius: 999px; background: var(--citation); display: inline-block; animation: tdot 1.1s var(--ease-in-out) infinite; }
.thinking-dots i:nth-child(2) { animation-delay: .18s; } .thinking-dots i:nth-child(3) { animation-delay: .36s; }
@keyframes tdot { 0%,100%{ transform: translateY(0); opacity:.45 } 50%{ transform: translateY(-4px); opacity:1 } }