/* ============================================================
   Cronolix — marketing landing
   Port of ui_kits/marketing-site/styles.css, mobile-first.
   Marketing is ALWAYS dark — bind legacy token names directly
   to the achromatic brand ladder (no theme-flip).
   ============================================================ */
@import url("fonts.css");
@import url("colors_and_type.css");

:root {
  /* ── Reconciled tokens referenced by the kit but absent upstream ── */
  --brand-silver-dark: #6e6e6e;        /* between silver-mid #9a9a9a and steel #505050 */
  --dur-base: 200ms;                   /* kit's .btn transitions (upstream ships --duration-ui) */

  /* ── Legacy token bindings (marketing = dark, achromatic ladder) ── */
  --bg:            var(--brand-void);
  --bg-surface:    #232323;
  --bg-elevated:   #2c2c2c;
  --border-1:      #444444;
  --border-2:      #555555;
  --fg-bright:     var(--brand-platinum);
  --fg-1:          var(--brand-platinum);
  --fg-2:          var(--brand-silver);
  --fg-3:          var(--brand-silver-mid);
  --fg-dim:        var(--brand-silver-dark);
  --fg-faint:      var(--brand-steel);
  --color-void:    var(--brand-void);
  --color-silver:  var(--brand-silver);
  --color-platinum:var(--brand-platinum);
  --color-graphite:var(--brand-graphite);
  --color-silver-dark: var(--brand-silver-dark);
  --fs-body:       16px;
  --lh-body:       1.75;

  /* Inputs (contact form) */
  --input-bg:      #0d0d0d;
  --input-border:  #222222;

  /* Responsive rhythm — shifted per breakpoint in one place */
  --page-pad-x:    20px;
  --page-pad-bottom: 96px;
  --section-top:   72px;
}

@media (min-width: 768px) {
  :root {
    --page-pad-x: 48px;
    --page-pad-bottom: 160px;
    --section-top: 120px;
  }
}

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

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

body {
  background: var(--bg);
  color: var(--fg-2);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img, svg, canvas { max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--fg-3);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Page chrome ── */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--page-pad-x) var(--page-pad-bottom);
}

section { padding-top: var(--section-top); }
section:first-of-type { padding-top: 32px; }

hr.divider {
  border: none;
  border-top: 1px solid var(--border-1);
  margin: 0 0 48px;
}

/* ── Section head ── */
.sec-num {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 10px;
}

.sec-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--fg-bright);
  margin-bottom: 32px;
}

/* ── Buttons ── */
.btn {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 14px 26px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out);
  display: inline-flex; align-items: center; gap: 12px;
  background: transparent;
  color: inherit;
}
.btn-primary { background: var(--color-silver); color: var(--color-void); }
.btn-primary:hover { background: var(--color-platinum); }
.btn-secondary { color: var(--fg-1); border-color: var(--color-graphite); }
.btn-secondary:hover { border-color: var(--color-silver-dark); color: var(--fg-bright); }
.btn-ghost { color: var(--fg-2); padding-left: 0; padding-right: 0; }
.btn-ghost:hover { color: var(--fg-bright); }

/* ── Cards ── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  border-radius: 8px;
  padding: 28px;
}

/* ── Generic helpers ── */
.row { display: flex; }
.col { display: flex; flex-direction: column; }

/* ── Typography helpers ── */
.eyebrow {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.display {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  letter-spacing: 0.01em;
  line-height: 1.05;
  color: var(--fg-bright);
}

.pullquote {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.01em;
  line-height: 1.55;
  color: var(--fg-1);
}

p { max-width: 640px; }

/* ============================================================
   Nav
   ============================================================ */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0 0;
  gap: 20px;
}
.brand-lockup { display: inline-flex; align-items: center; gap: 12px; }
.wordmark {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: 0.32em;
  margin-right: -0.32em;            /* optical compensation for trailing tracking */
  text-transform: uppercase;
  color: var(--fg-2);
  display: inline-block;
  line-height: 1;
}
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-link {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-2);
  padding: 10px 4px;
  transition: color 200ms var(--ease-out);
}
.nav-link:hover { color: var(--fg-bright); }
.nav-link--cta { color: var(--fg-bright); }

/* Below 600px the 4 inline links won't fit — keep only Contact → (anti-iconographic, no hamburger). */
@media (max-width: 599px) {
  .nav-links { gap: 0; }
  .nav-link--collapsible { display: none; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero { min-height: 82vh; display: flex; align-items: center; padding-top: 64px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
  width: 100%;
}
.hero-copy { display: flex; flex-direction: column; gap: 28px; }
.hero-lead { font-size: 17px; color: var(--fg-2); line-height: 1.75; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 4px; }
.hero-rings { display: flex; justify-content: center; align-items: center; order: -1; }

@media (min-width: 768px) {
  .hero-grid { grid-template-columns: 1.4fr 1fr; gap: 64px; }
  .hero-copy { gap: 32px; }
  .hero-rings { order: 0; }
  .hero-actions { margin-top: 12px; }
}

/* ============================================================
   ProofPoints (#work)
   ============================================================ */
.block-head {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: 0.01em;
  color: var(--fg-bright);
}
.proof-intro { display: flex; flex-direction: column; gap: 24px; margin-bottom: 48px; max-width: 820px; }
.proof-head { font-size: clamp(32px, 5.5vw, 56px); line-height: 1.05; }
.proof-lead { font-size: 17px; line-height: 1.75; color: var(--fg-2); max-width: 700px; }

.proof-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.proof-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  border-radius: 8px;
  padding: 32px 28px 36px;
  text-align: center;
  transition: background 250ms var(--ease-out), border-color 250ms var(--ease-out);
}
.proof-card:hover { background: var(--bg-elevated); border-color: var(--border-2); }
.proof-card-tag {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-bottom: 22px;
}
.proof-card-head {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.3;
  color: var(--fg-bright);
  margin-bottom: 14px;
}
.proof-card-body { color: var(--fg-2); font-size: 14px; line-height: 1.75; max-width: 280px; margin: 0 auto; }

@media (min-width: 768px) {
  .proof-intro { gap: 24px; margin-bottom: 72px; }
  .proof-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   CaseStudy (#case-study)
   ============================================================ */
.split-grid { display: grid; grid-template-columns: 1fr; gap: 32px; align-items: start; }
.case-copy { display: flex; flex-direction: column; gap: 28px; }
.case-head { font-size: clamp(28px, 5vw, 40px); font-weight: 300; letter-spacing: 0.02em; line-height: 1.2; }
.case-body { font-size: 16px; line-height: 1.8; color: var(--fg-2); }
.case-card { padding: 36px 28px; }
.case-quote { font-size: clamp(22px, 3.4vw, 26px); line-height: 1.45; color: var(--fg-bright); }
.sec-num--in-card { color: var(--fg-2); margin-bottom: 20px; }
.sec-num--attribution { color: var(--fg-3); margin-top: 28px; margin-bottom: 0; }

@media (min-width: 768px) {
  .split-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
  .case-card { padding: 44px 36px; }
}

/* ============================================================
   Process (#process)
   ============================================================ */
.process-intro { display: flex; flex-direction: column; gap: 28px; margin-bottom: 48px; }
.process-head { font-size: clamp(30px, 5vw, 44px); font-weight: 300; letter-spacing: 0.02em; line-height: 1.15; color: var(--fg-bright); }
.process-lead { font-size: 15px; line-height: 1.8; color: var(--fg-2); }

.chart-card { padding: 28px 18px 20px; margin-bottom: 56px; }
.chart-cap { text-align: center; color: var(--fg-faint); margin-top: 12px; margin-bottom: 0; }
.scurve-wrap { width: 100%; }

.process-steps { display: flex; flex-direction: column; gap: 0; }
.process-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 22px;
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  border-top: none;
}
.process-step:first-child { border-top: 1px solid var(--border-1); border-radius: 8px 8px 0 0; }
.process-step:last-child { border-radius: 0 0 8px 8px; }
.process-step-num { margin-bottom: 0; }
.process-step-title { font-family: var(--font-display); font-size: 17px; font-weight: 400; color: var(--fg-1); letter-spacing: 0.02em; }
.process-step-body { font-size: 14px; line-height: 1.75; color: var(--fg-2); }

@media (min-width: 768px) {
  .chart-card { padding: 40px 32px 24px; }
  .process-step { grid-template-columns: 80px 240px 1fr; gap: 32px; padding: 26px 28px; align-items: baseline; }
}

/* ============================================================
   Philosophy (#about)
   ============================================================ */
.philo-block { display: flex; flex-direction: column; gap: 28px; margin-bottom: 56px; }
.philo-head { font-size: clamp(30px, 5.5vw, 48px); font-weight: 300; letter-spacing: 0.01em; line-height: 1.1; color: var(--fg-bright); }
.philo-body { font-size: 16px; line-height: 1.8; color: var(--fg-2); max-width: 720px; }
.philo-card { margin-top: 12px; padding: 32px 28px; }
.philo-quote { font-size: clamp(20px, 3vw, 24px); color: var(--fg-bright); }

@media (min-width: 768px) { .philo-card { padding: 36px; } }

/* ============================================================
   Lemmas (#lemmas)
   ============================================================ */
.lemmas-lead { font-size: 15px; line-height: 1.8; color: var(--fg-2); max-width: 720px; margin-bottom: 36px; }
.lemma-list { display: flex; flex-direction: column; gap: 0; }
.lemma-row {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 24px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  border-top: none;
}
.lemma-row:first-child { border-top: 1px solid var(--border-1); border-radius: 8px 8px 0 0; }
.lemma-row:last-child { border-radius: 0 0 8px 8px; }
.lemma-num { margin-bottom: 0; min-width: 28px; }
.lemma-text { font-family: var(--font-display); font-size: 22px; font-weight: 300; color: var(--fg-1); letter-spacing: 0.02em; }

@media (min-width: 768px) { .lemma-row { padding: 24px 28px; } }

/* ============================================================
   Contact (#contact)
   ============================================================ */
.contact-head { font-size: clamp(40px, 8vw, 72px); font-weight: 300; letter-spacing: 0.01em; line-height: 1.05; color: var(--fg-bright); }
.contact-copy { display: flex; flex-direction: column; gap: 28px; }
.contact-lead { font-size: 16px; line-height: 1.8; color: var(--fg-2); }
.contact-email { color: var(--fg-2); letter-spacing: 0.2em; }
.contact-form { padding: 28px 22px; }
.form-fields { display: flex; flex-direction: column; gap: 16px; }
.field {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 16px;                  /* 16px floor prevents iOS focus-zoom */
  color: var(--fg-2);
  outline: none;
  width: 100%;
  transition: border-color var(--dur-base) var(--ease-out);
}
.field:focus { border-color: var(--fg-faint); }
.field::placeholder { color: var(--fg-faint); }
textarea.field { resize: vertical; min-height: 96px; }
.field-hp {                          /* honeypot — hidden from humans, visible to bots */
  position: absolute; left: -9999px; width: 1px; height: 1px;
  opacity: 0; pointer-events: none;
}
.form-foot { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 8px; flex-wrap: wrap; }
.form-status { margin-bottom: 0; color: var(--fg-faint); }
.form-status[data-state="error"] { color: var(--signal-error); }
.form-status[data-state="sent"] { color: var(--signal-success); }

@media (min-width: 768px) { .contact-form { padding: 36px 32px; } }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { padding-top: 72px; margin-top: 96px; border-top: 1px solid var(--border-1); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 28px; align-items: center; justify-items: center; text-align: center; }
.footer-brand { display: inline-flex; align-items: center; gap: 12px; }
.footer-lemmas { margin-bottom: 0; color: var(--fg-2); letter-spacing: 0.22em; }
.footer-links { display: flex; gap: 24px; justify-content: center; }
.footer-link { margin-bottom: 0; }
.footer-copy { text-align: center; margin-top: 48px; margin-bottom: 0; color: var(--fg-faint); letter-spacing: 0.22em; }

@media (min-width: 768px) {
  .site-footer { padding-top: 96px; }
  .footer-grid { grid-template-columns: 1fr 2fr 1fr; gap: 48px; justify-items: stretch; text-align: left; }
  .footer-brand { justify-self: start; }
  .footer-links { justify-content: flex-end; }
  .footer-copy { margin-top: 56px; }
}

/* ============================================================
   Reduced motion — rings freeze, S-curve draws final state once
   (the JS also honors this; the CSS guard covers any transitions)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}