:root {
  --ink: #0F2A22;
  --ink-2: #16382E;
  --ink-line: rgba(245, 242, 234, 0.14);
  --paper: #F5F2EA;
  --paper-2: #EBE6DA;
  --paper-line: rgba(15, 42, 34, 0.14);
  --amber: #F2C14E;
  --amber-press: #E3AE32;
  --text: #0F2A22;
  --muted: #3F5650;
  --muted-on-ink: #B9C7C1;
  --ok: #5CC28E;
  --warn: #F2C14E;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;

  --wrap: 1200px;
  --gutter: clamp(20px, 5vw, 56px);
  --nav-h: 68px;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --font-display: "Bricolage Grotesque", Georgia, serif;
  --font-body: "Geist", "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--amber); color: var(--ink); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 4px; }
html { scrollbar-color: var(--ink) var(--paper-2); }

h1, h2, h3 { font-family: var(--font-display); margin: 0; letter-spacing: -0.02em; line-height: 1.05; }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; }
p { margin: 0 0 1em; }
a { color: inherit; text-underline-offset: 3px; }
mark { background: var(--amber); color: var(--ink); padding: 0.05em 0.3em; border-radius: 4px; font-variant-numeric: tabular-nums; white-space: nowrap; }

.wrap { width: 100%; max-width: calc(var(--wrap) + var(--gutter) * 2); margin: 0 auto; padding: 0 var(--gutter); }

.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--amber); color: var(--ink); padding: 8px 14px; border-radius: var(--radius-s); }
.skip:focus { left: 8px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 1rem/1 var(--font-body);
  padding: 0 24px; height: 56px;
  border-radius: var(--radius-m);
  border: 0; cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: transform 160ms var(--ease-out), background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--amber); color: var(--ink); }
.btn--small { height: 42px; padding: 0 18px; font-size: 0.95rem; background: var(--amber); color: var(--ink); border-radius: var(--radius-s); }
.btn--ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover, .btn--small:hover { background: var(--amber-press); }
  .btn--ghost:hover { background: var(--ink); color: var(--paper); }
}

.link-btn {
  background: none; border: 0; padding: 0; cursor: pointer;
  font: 500 0.9rem var(--font-body); color: var(--muted-on-ink);
  text-decoration: underline; text-underline-offset: 3px;
  transition: color 200ms ease;
}
@media (hover: hover) and (pointer: fine) { .link-btn:hover { color: var(--paper); } }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: var(--ink); color: var(--paper); border-bottom: 1px solid var(--ink-line); }
.nav__row { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 800 1.15rem var(--font-display); letter-spacing: -0.02em; color: var(--paper); }
.brand__mark { width: 32px; height: 32px; flex: none; }
.nav__menu { display: flex; align-items: center; gap: 28px; }
.nav__menu a:not(.btn) { text-decoration: none; font-size: 0.95rem; color: var(--muted-on-ink); transition: color 200ms ease; }
@media (hover: hover) and (pointer: fine) { .nav__menu a:not(.btn):hover { color: var(--paper); } }
.nav__toggle { display: none; }

/* Hero */
.hero {
  background: var(--ink); color: var(--paper);
  min-height: calc(100svh - var(--nav-h));
  display: flex; align-items: center;
  padding: 48px 0 56px;
}
.hero__grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(24px, 4vw, 64px); align-items: center; }
.hero__inner { display: flex; flex-direction: column; min-width: 0; }
.hero__title { font-size: clamp(2.6rem, 5.4vw, 5.25rem); font-weight: 800; max-width: 13ch; }
.hero__lead { margin-top: 24px; max-width: 46ch; font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--muted-on-ink); }
.hero__lead strong { color: var(--paper); font-weight: 600; }

.track { margin-top: 36px; max-width: 880px; }
.track__label { display: block; font-weight: 600; font-size: 0.95rem; margin-bottom: 10px; }
.track__field {
  display: flex; align-items: center; gap: 8px;
  background: var(--paper); border-radius: calc(var(--radius-m) + 8px);
  padding: 8px; padding-left: 22px;
  box-shadow: 0 0 0 0 rgba(242, 193, 78, 0);
  transition: box-shadow 200ms ease;
}
.track__field:focus-within { box-shadow: 0 0 0 4px rgba(242, 193, 78, 0.45); }
.track__field input {
  flex: 1; min-width: 0; height: 56px; border: 0; background: transparent; outline: none;
  font: 600 clamp(1.15rem, 2.2vw, 1.5rem) var(--font-body); color: var(--ink);
  font-variant-numeric: tabular-nums; letter-spacing: 0.04em; caret-color: var(--ink);
}
.track__field input::placeholder { color: #6B7F78; font-weight: 500; letter-spacing: 0.02em; }
.track__badge {
  font: 600 0.8rem/1 var(--font-body); padding: 7px 10px; border-radius: 999px;
  background: var(--paper-2); color: var(--ink); white-space: nowrap;
  opacity: 0; transform: scale(0.95); transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out);
}
.track__badge.is-on { opacity: 1; transform: scale(1); }
.track__badge.is-bad { background: #F6D9D2; color: #7A2414; }
.track__hint { margin: 10px 0 0; font-size: 0.92rem; color: var(--muted-on-ink); min-height: 1.5em; }
.track__hint.is-error { color: #FFB4A3; }
.track__result { color: var(--amber); font-weight: 600; font-size: 1rem; }

.recent { margin-top: 28px; max-width: 880px; }
.recent__title { font: 600 0.9rem var(--font-body); letter-spacing: 0; color: var(--muted-on-ink); margin-bottom: 10px; }
.recent__list { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; border: 1px solid var(--ink-line); border-radius: 999px; overflow: hidden;
}
.chip button { background: none; border: 0; color: var(--paper); cursor: pointer; font: 500 0.95rem var(--font-body); font-variant-numeric: tabular-nums; transition: background-color 200ms ease, transform 160ms var(--ease-out); }
.chip__go { padding: 8px 6px 8px 14px; }
.chip__x { display: inline-flex; align-items: center; padding: 8px 14px 8px 8px; color: var(--muted-on-ink) !important; }
.chip button:active { transform: scale(0.97); }
@media (hover: hover) and (pointer: fine) { .chip:hover { background: var(--ink-2); } .chip__x:hover { color: var(--paper) !important; } }

.hero__facts { list-style: none; padding: 0; margin: 44px 0 0; display: flex; flex-wrap: wrap; gap: 10px 32px; font-size: 0.95rem; color: var(--muted-on-ink); }
.hero__facts li { display: inline-flex; align-items: center; gap: 10px; }
.hero__facts li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }

/* 3D stages */
.stage { position: relative; }
.stage--hero { height: min(560px, 64vh); min-height: 360px; }
.stage--route { height: 300px; margin-top: 40px; }
.stage__canvas { position: absolute; inset: 0; }
.stage__canvas canvas { display: block; width: 100% !important; height: 100% !important; }
.stage--hero .stage__canvas canvas { cursor: grab; }
.stage--hero .stage__canvas.is-dragging canvas { cursor: grabbing; }
.stage__fallback { position: absolute; inset: 0; width: 100%; height: 100%; padding: 8%; transition: opacity 300ms ease; }
.stage.is-live .stage__fallback { opacity: 0; pointer-events: none; }
.stage__tip { position: absolute; left: 0; bottom: 4px; margin: 0; font-size: 0.85rem; color: var(--muted-on-ink); opacity: 0; transition: opacity 200ms ease; }
.stage__pause {
  position: absolute; right: 0; bottom: 0; width: 40px; height: 40px; border-radius: 50%;
  display: none; align-items: center; justify-content: center; cursor: pointer;
  background: transparent; color: var(--paper); border: 1px solid var(--ink-line);
  transition: transform 160ms var(--ease-out), background-color 200ms ease;
}
.stage.is-live .stage__pause { display: inline-flex; }
.stage.is-live .stage__tip { opacity: 1; }
.stage__pause:active { transform: scale(0.95); }
.stage__pause .i-play { display: none; }
.stage__pause[data-state="paused"] .i-play { display: block; }
.stage__pause[data-state="paused"] .i-pause { display: none; }
@media (hover: hover) and (pointer: fine) { .stage__pause:hover { background: var(--ink-2); } }

/* Sections */
.section { min-height: calc(100svh - var(--nav-h)); display: flex; align-items: center; padding: 96px 0; }
.section--ink { background: var(--ink); color: var(--paper); }
.section--ink .split__text p { color: var(--muted-on-ink); }
.split { display: grid; grid-template-columns: 5fr 6fr; gap: clamp(40px, 6vw, 96px); align-items: center; }
.split--top { align-items: start; }
.split__text h2 { margin-bottom: 24px; max-width: 14ch; }
.split__text p { color: var(--muted); max-width: 44ch; }
.split__text .btn { margin-top: 12px; }

/* Code visual */
.split__visual { position: relative; min-height: 460px; }
.phone {
  width: min(340px, 78%); background: #fff; border-radius: 34px; padding: 18px 16px 28px;
  border: 1px solid var(--paper-line); box-shadow: 0 30px 60px -30px rgba(15, 42, 34, 0.35);
}
.phone__bar { display: flex; justify-content: space-between; font-size: 0.8rem; font-weight: 600; color: var(--muted); padding: 2px 8px 14px; border-bottom: 1px solid var(--paper-line); margin-bottom: 16px; }
.sms { background: #EEF0EC; border-radius: 18px 18px 18px 6px; padding: 12px 14px; margin-bottom: 12px; max-width: 92%; }
.sms__from { font-size: 0.75rem; font-weight: 600; color: var(--muted); margin: 0 0 4px; }
.sms__body { font-size: 0.92rem; line-height: 1.45; margin: 0; }
.sms mark { white-space: normal; }
.slip {
  position: absolute; right: 0; bottom: 0; width: min(360px, 70%);
  background: var(--paper); border: 1.5px dashed rgba(15, 42, 34, 0.35); border-radius: var(--radius-m);
  padding: 18px 20px; box-shadow: 0 24px 50px -28px rgba(15, 42, 34, 0.4);
}
.slip__head { display: flex; justify-content: space-between; gap: 12px; font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 14px; }
.slip__row { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: var(--muted); }
.slip__row mark { font-size: 1.05rem; font-weight: 600; align-self: flex-start; }
.slip__bars {
  margin-top: 16px; height: 44px;
  background: repeating-linear-gradient(90deg, var(--ink) 0 2px, transparent 2px 5px, var(--ink) 5px 6px, transparent 6px 9px, var(--ink) 9px 12px, transparent 12px 14px);
}

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps__item {
  position: relative; padding: 0 0 26px 44px;
}
.steps__item::before {
  content: ""; position: absolute; left: 6px; top: 6px; width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--muted-on-ink); background: var(--ink);
}
.steps__item::after {
  content: ""; position: absolute; left: 13px; top: 24px; bottom: 2px; width: 1px; background: var(--ink-line);
}
.steps__item:last-child { padding-bottom: 0; }
.steps__item:last-child::after { display: none; }
.steps__item h3 { color: var(--paper); margin-bottom: 4px; }
.steps__item p { margin: 0; color: var(--muted-on-ink); max-width: 52ch; }
.steps__item--done::before { background: var(--ok); border-color: var(--ok); }
.steps__item--warn { margin-top: 10px; padding-top: 22px; border-top: 1px solid var(--ink-line); }
.steps__item--warn::before { top: 28px; background: var(--warn); border-color: var(--warn); }

/* FAQ */
.faq { border-top: 1px solid var(--paper-line); }
.faq details { border-bottom: 1px solid var(--paper-line); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 0; font: 600 1.1rem/1.35 var(--font-body);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 12px; height: 12px;
  border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink);
  transform: translateY(-3px) rotate(45deg); transition: transform 200ms var(--ease-out);
}
.faq details[open] summary::after { transform: translateY(3px) rotate(225deg); }
.faq details p { margin: 0 0 22px; color: var(--muted); max-width: 60ch; }

/* Footer */
.footer { background: var(--ink); color: var(--muted-on-ink); padding: 48px 0; font-size: 0.88rem; }
.footer__row { display: grid; grid-template-columns: auto 1fr auto; gap: 32px; align-items: start; }
.footer__note { margin: 0; max-width: 70ch; }
.footer__copy { margin: 0; white-space: nowrap; }

/* Responsive */
@media (max-width: 1100px) {
  .hero__grid { grid-template-columns: 1fr; }
  .stage--hero { height: 340px; min-height: 0; margin-top: 24px; }
}

@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; }
  .split__visual { min-height: 440px; }
  .footer__row { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 820px) {
  .nav__toggle {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 6px;
    width: 44px; height: 44px; background: none; border: 0; cursor: pointer; padding: 10px;
  }
  .nav__toggle span { display: block; height: 2px; background: var(--paper); border-radius: 2px; transition: transform 200ms var(--ease-out); }
  .nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav__menu {
    position: fixed; inset: var(--nav-h) 0 0 0; background: var(--ink);
    flex-direction: column; align-items: stretch; gap: 0; padding: 16px var(--gutter) 32px;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 0s linear 200ms;
  }
  .nav__menu.is-open { opacity: 1; visibility: visible; transform: none; transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out); }
  .nav__menu a:not(.btn) { font: 700 1.6rem var(--font-display); color: var(--paper); padding: 18px 0; border-bottom: 1px solid var(--ink-line); }
  .nav__menu .btn { margin-top: 24px; height: 56px; font-size: 1rem; }
  body.menu-open { overflow: hidden; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .track__field { flex-wrap: wrap; padding: 8px; padding-left: 8px; }
  .track__field input { flex-basis: 100%; padding: 0 12px; }
  .track__badge { position: absolute; right: 16px; top: 22px; }
  .track__field input { padding-right: 130px; }
  .track__field { position: relative; }
  .track__field .btn { width: 100%; }
  .section { padding: 72px 0; }
  .split__visual { min-height: 0; }
  .phone { width: 100%; max-width: 320px; }
  .slip { position: relative; width: 88%; margin: -14px 0 0 auto; }
  .hero__facts { flex-direction: column; margin-top: 32px; }
  .stage--hero { height: 280px; }
  .stage--route { height: 240px; margin-top: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-property: opacity, color, background-color, box-shadow !important; }
  .btn:active, .chip button:active { transform: none; }
}

/* ---------- Long-form content blocks ---------- */
.block { padding: clamp(64px, 9vw, 112px) 0; }
.block--alt { background: var(--paper-2); }
.block--ink { background: var(--ink); color: var(--paper); }
.prose { max-width: calc(760px + var(--gutter) * 2); }
.split .prose { padding: 0; }
.prose h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); margin: 0 0 20px; }
.prose h2:not(:first-child) { margin-top: 64px; }
.prose h3 { margin: 40px 0 12px; }
.prose p, .prose li { color: var(--muted); line-height: 1.65; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 1.3em; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--ink); font-weight: 600; }
.prose strong { color: var(--text); }
.prose a { color: var(--ink); text-decoration-color: var(--amber); text-decoration-thickness: 2px; text-underline-offset: 3px; }
.block--ink .prose p, .block--ink .prose li { color: var(--muted-on-ink); }
.block--ink .prose strong, .block--ink .prose a, .block--ink .prose li::marker { color: var(--paper); }
.table { overflow-x: auto; margin: 8px 0 24px; border: 1px solid var(--paper-line); border-radius: var(--radius-m); }
.block--ink .table { border-color: var(--ink-line); }
.table table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.table th, .table td { text-align: left; padding: 14px 18px; vertical-align: top; border-bottom: 1px solid var(--paper-line); }
.block--ink .table th, .block--ink .table td { border-color: var(--ink-line); }
.table tr:last-child td { border-bottom: 0; }
.table th { font-weight: 600; color: var(--text); background: rgba(15, 42, 34, 0.05); }
.block--ink .table th { color: var(--paper); background: var(--ink-2); }
.table td:first-child { font-weight: 500; color: var(--text); white-space: nowrap; }
.block--ink .table td { color: var(--muted-on-ink); }
.block--ink .table td:first-child { color: var(--paper); }
@media (max-width: 860px) { .block .split { grid-template-columns: 1fr; } }

/* ---------- Footer links + legal pages ---------- */
.footer__links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 16px; }
.footer__links a { color: var(--paper); text-decoration: none; }
.footer__links a:hover { text-decoration: underline; }
.page-head { background: var(--ink); color: var(--paper); padding: 72px 0 48px; }
.page-head h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
.page-head p { color: var(--muted-on-ink); margin: 14px 0 0; }

/* ---------- Articles ---------- */
.crumbs { font-size: 0.88rem; color: var(--muted-on-ink); margin-bottom: 14px; }
.crumbs a { color: var(--paper); text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }
.cta { margin-top: 56px; padding: 28px; border-radius: var(--radius-l); background: var(--ink); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.prose .cta p { margin: 0; color: var(--paper); font: 700 1.25rem var(--font-display); }
.prose .cta .btn { color: var(--ink); text-decoration: none; }