/* ============================================================
   TWOEN · marketing doorway  ·  site.css
   ------------------------------------------------------------
   The lean multi-page funnel (Home / Demo / Products / Services
   / Contact). Reuses the Practice-v1 brand tokens + type
   primitives, but a normal-scroll, nav-led layout — not the
   scroll-snap "printed brief" deck (that lives in styles.css,
   used only by practice.html).
   ============================================================ */

/* —— TOKENS (shared with the brand) —— */
:root {
  --paper: #F2EDE3;
  --paper-deep: #EAE3D5;
  --ink: #1A1814;
  --ink-soft: #6B6055;
  --ink-faint: #A89E8E;
  --accent: #B5471F;
  --accent-deep: #9A3C1A;
  --rule: #D4C9B5;
  --rule-soft: #E2D9C7;
  --dark: #0F0E0C;

  --serif: 'IBM Plex Serif', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --col-max: 60rem;
  --gutter: 1.5rem;
}

/* —— RESET / BASE —— */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga", "calt";
}
img { max-width: 100%; display: block; }
sup { font-feature-settings: "sups" off; }
a { color: var(--accent); text-decoration: none; }

.wrap { width: 100%; max-width: var(--col-max); margin: 0 auto; padding: 0 var(--gutter); }

/* —— TYPE PRIMITIVES (carried from the brand) —— */
.eyebrow {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.26em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.875rem;
}
.section-title {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(1.875rem, 4.5vw, 2.75rem); line-height: 1.04;
  letter-spacing: -0.022em; color: var(--ink);
}
.accent { color: var(--accent); }
.prose {
  font-family: var(--serif); font-weight: 400; font-variation-settings: "opsz" 16;
  font-size: clamp(1rem, 1.15vw, 1.125rem); line-height: 1.65; color: var(--ink); max-width: 40rem;
}
.prose p { margin-bottom: 0.9rem; }
.muted { color: var(--ink-soft); }

/* —— NAV —— */
.nav {
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 20;
  background: rgba(242, 237, 227, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
}
.nav__inner {
  max-width: var(--col-max); margin: 0 auto; padding: 0.95rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brandmark {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: 1.5rem; line-height: 1; letter-spacing: -0.02em; color: var(--ink);
}
.brandmark sup { font-size: 0.55em; color: var(--accent); margin-left: 0.04em; }
/* —— wordmark: company identity, square all-caps (matches nav family, 0176) —— */
/* de-boutiqued: same IBM Plex Mono / uppercase / wide tracking as .nav__links,
   one weight up + ink so it reads as the brand. Standard header on every page. */
.wordmark {
  font-family: var(--mono); font-weight: 500;
  font-size: 0.82rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink); line-height: 1;
}
.nav__links { display: flex; gap: 1.6rem; align-items: center; }
.nav__links a {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-soft);
  transition: color 0.15s ease;
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--accent); }

/* —— BUTTONS —— */
.btn {
  display: inline-block; font-family: var(--mono); font-size: 0.78rem;
  letter-spacing: 0.16em; text-transform: uppercase; line-height: 1;
  padding: 0.95rem 1.5rem; border: 1px solid var(--accent);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn--primary { background: var(--accent); color: var(--paper); }
.btn--primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn--ghost { background: transparent; color: var(--accent); }
.btn--ghost:hover { background: var(--accent); color: var(--paper); }
.btn--sm { padding: 0.7rem 1.1rem; font-size: 0.7rem; }

/* item 5 (kestrel 0414) — inline mobile Start-Demo CTA on inner pages (2n/proof/about). The demo sidecar
   only becomes a fixed column ≥1200px and otherwise stacks far below the copy, so a mobile reader gets no
   early one-tap path in. This surfaces one right after the hero, MOBILE-ONLY (desktop keeps the sidecar).
   Reversible: delete this rule + the .mobile-demo-cta blocks in the three inner pages to restore. */
.mobile-demo-cta { display: none; }
@media (max-width: 760px) {
  .mobile-demo-cta { display: block; margin: clamp(1.5rem, 5vw, 2.25rem) 0 0; }
}

/* —— SECTIONS —— */
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; border-top: 1px solid var(--rule-soft); }
.section:first-of-type { border-top: none; }
.section__head { margin-bottom: 2rem; }

/* —— HERO —— */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 6vw, 4.5rem); }
.hero__title {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: clamp(2.5rem, 7vw, 4.5rem); line-height: 0.98;
  letter-spacing: -0.03em; color: var(--ink); max-width: 18ch;
}
.hero__sub {
  font-family: var(--serif); font-weight: 400; font-variation-settings: "opsz" 16;
  font-size: clamp(1.15rem, 1.8vw, 1.5rem); line-height: 1.45;
  color: var(--ink-soft); margin-top: 1.25rem; max-width: 34rem;
}
.hero__reinforce {
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.06em;
  color: var(--ink); margin-top: 1.5rem;
}
.hero__cta { margin-top: 2.25rem; display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.hero__cta .note { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; color: var(--ink-faint); }

/* —— STEPS (How It Works) —— */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.step { border-top: 2px solid var(--accent); padding-top: 1rem; }
.step__num {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.24em;
  color: var(--accent); margin-bottom: 0.6rem;
}
.step__head {
  font-family: var(--serif); font-style: italic; font-size: 1.25rem;
  line-height: 1.15; color: var(--ink); margin-bottom: 0.5rem;
}
.step__body { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.55; }

/* —— LADDER (Grow With It) —— */
.ladder { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--rule); }
.rung { padding: 1.25rem 1.25rem 1.25rem 0; border-right: 1px solid var(--rule); }
.rung:last-child { border-right: none; padding-right: 0; padding-left: 1.25rem; }
.rung__tag {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: 0.5rem;
}
.rung__head { font-family: var(--serif); font-style: italic; font-size: 1.15rem; color: var(--ink); margin-bottom: 0.4rem; }
.rung__body { font-size: 0.9rem; color: var(--ink-soft); line-height: 1.5; }

/* —— PRODUCT TIERS —— */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.product {
  border: 1px solid var(--rule); padding: 1.6rem 1.5rem;
  display: flex; flex-direction: column;
}
.product__tag {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.75rem;
}
.product__name { font-family: var(--serif); font-style: italic; font-size: 1.5rem; line-height: 1.05; color: var(--ink); margin-bottom: 0.4rem; }
.product__price { font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.04em; color: var(--ink); margin-bottom: 1rem; }
.product__price small { color: var(--ink-soft); letter-spacing: 0.02em; }
.product__list { list-style: none; margin-top: auto; }
.product__list li {
  font-family: var(--sans); font-size: 0.9rem; color: var(--ink-soft);
  padding: 0.4rem 0; border-top: 1px solid var(--rule-soft);
}
.product__list li::before { content: '→  '; color: var(--accent); }

/* —— JOURNEY (Demo steps) —— */
.journey { list-style: none; counter-reset: j; border-top: 1px solid var(--rule); }
.journey li {
  counter-increment: j; display: flex; gap: 1.25rem; align-items: baseline;
  padding: 1rem 0; border-bottom: 1px solid var(--rule-soft);
}
.journey li::before {
  content: counter(j, decimal-leading-zero); font-family: var(--mono);
  font-size: 0.72rem; letter-spacing: 0.1em; color: var(--accent); flex-shrink: 0; width: 2rem;
}
.journey b { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--ink); }
.journey span { color: var(--ink-soft); font-size: 0.95rem; }

/* —— CALLOUT (privacy / sovereignty) —— */
.callout {
  background: var(--paper-deep); border-left: 2px solid var(--accent);
  padding: 1.5rem 1.75rem; max-width: 44rem;
}
.callout .eyebrow { margin-bottom: 0.6rem; }

/* —— FAQ —— */
.faq details { border-bottom: 1px solid var(--rule-soft); padding: 0.9rem 0; }
.faq summary {
  font-family: var(--serif); font-style: italic; font-size: 1.05rem; color: var(--ink);
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem;
}
.faq summary::after { content: '+'; font-family: var(--mono); color: var(--accent); }
.faq details[open] summary::after { content: '–'; }
.faq p { margin-top: 0.7rem; color: var(--ink-soft); font-size: 0.95rem; line-height: 1.6; max-width: 42rem; }

/* —— CONTACT CHANNELS —— */
.channels { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.channel { padding: 1.25rem 1.25rem 1.25rem 0; border-right: 1px solid var(--rule-soft); }
.channel:last-child { border-right: none; }
.channel__lbl { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.4rem; }
.channel__val { font-family: var(--serif); font-style: italic; font-size: 1.15rem; color: var(--ink); }

/* —— FOOTER —— */
.foot { background: var(--dark); color: var(--paper); margin-top: 1rem; }
.foot__inner {
  max-width: var(--col-max); margin: 0 auto; padding: 2.5rem var(--gutter);
  display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; align-items: flex-end;
}
.foot a { color: var(--paper); }
.foot__links { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.foot__links a, .foot__meta {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: rgba(242,237,227,0.66);
}
.foot__links a:hover { color: var(--paper); }
.foot__mark { font-family: var(--serif); font-style: italic; font-size: 1.4rem; color: var(--paper); }
.foot__mark sup { color: var(--accent); font-size: 0.55em; }
/* —— minimal footer (0179): slim black terminator, brand + legal only —— */
.foot--min .foot__inner { padding: 1rem var(--gutter); align-items: center; }
.foot__brand {
  font-family: var(--mono); font-weight: 500; font-size: 0.72rem;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--paper);
}
.foot__legal {
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em;
  color: rgba(242,237,227,0.5);
}
.foot__legal sup { font-size: 0.7em; }

/* —— RESPONSIVE —— */
@media (max-width: 760px) {
  .nav__links { gap: 1.1rem; }
  .steps, .ladder, .products, .channels { grid-template-columns: 1fr; }
  .ladder { border-top: none; }
  .rung { border-right: none; border-top: 1px solid var(--rule); padding: 1rem 0; }
  .rung:last-child { padding-left: 0; }
  .channel { border-right: none; border-bottom: 1px solid var(--rule-soft); padding: 1rem 0; }
}
@media (max-width: 460px) {
  .nav__inner { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
  .nav__links { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }