/* Central Praia Design System 1.0 | site interface layer
   Loaded after tokens.css, components.css and guide.css.
   Only the page shell is defined here: header, index rail, mobile menu,
   section bands and footer. Brand tokens and content styles stay untouched. */

:root {
  --ui-header-h: 72px;
  --ui-rail-w: 256px;
  --ui-frame: 1320px;
  --ui-gutter: 40px;
  --ui-ease: cubic-bezier(0.23, 1, 0.32, 1);
}

html { scroll-padding-top: calc(var(--ui-header-h) + 16px); }
body { background: var(--cp-cal); overflow-x: hidden; }
body.menu-open { overflow: hidden; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--ui-header-h);
  background: var(--cp-asfalto); color: var(--cp-cal);
  border-bottom: 1px solid var(--cp-grafite);
}
.site-header__inner {
  height: 100%; display: flex; align-items: center; gap: 24px;
  padding: 0 32px;
}
.site-brand {
  display: inline-flex; align-items: center; gap: 12px;
  color: var(--cp-cal); text-decoration: none; flex-shrink: 0;
  min-height: 48px;
}
.site-brand img { width: 30px; height: 34px; }
.site-brand strong { font: 900 15px/1 var(--cp-font-display); letter-spacing: -.035em; }
.site-brand__tag {
  font: 500 10px/1 var(--cp-font-data); letter-spacing: .06em; text-transform: uppercase;
  color: var(--cp-cimento); padding-left: 12px; margin-left: 4px;
  border-left: 1px solid var(--cp-apoio);
}
.site-nav { display: flex; gap: 4px; margin: 0 auto; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 14px;
  font: 500 11px/1 var(--cp-font-data); letter-spacing: .06em; text-transform: uppercase;
  color: var(--cp-concreto); text-decoration: none;
  transition: color 160ms var(--ui-ease);
}
.site-nav a:hover { color: var(--cp-cal); }
.site-nav a.is-active { color: var(--cp-coral); }
.site-cta {
  display: inline-flex; align-items: center; gap: 6px; min-height: 48px;
  font: 700 14px/1 var(--cp-font-body); color: var(--cp-coral); text-decoration: none;
  flex-shrink: 0;
}
.site-cta:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-current {
  display: none;
  font: 500 10px/1.3 var(--cp-font-data); letter-spacing: .05em; text-transform: uppercase;
  color: var(--cp-concreto); margin-left: auto; text-align: right;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0;
}
.menu-toggle {
  display: none; position: relative;
  width: 48px; height: 48px; margin-right: -12px; flex-shrink: 0;
  background: transparent; border: 0; color: var(--cp-cal); cursor: pointer; border-radius: 4px;
}
.menu-toggle span {
  position: absolute; left: 13px; width: 22px; height: 2px; background: currentColor;
  transition: transform 240ms var(--ui-ease), opacity 160ms var(--ui-ease);
}
.menu-toggle span:nth-child(1) { top: 17px; }
.menu-toggle span:nth-child(2) { top: 23px; }
.menu-toggle span:nth-child(3) { top: 29px; }
.menu-toggle[aria-expanded="true"] { color: var(--cp-coral); }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.site-header :focus-visible { outline: 2px solid var(--cp-cal); outline-offset: 2px; box-shadow: none; }

.read-progress {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%;
  background: var(--cp-coral); transform-origin: 0 50%; transform: scaleX(0);
}

/* ---------- Mobile menu panel ---------- */
.menu-panel {
  position: fixed; z-index: 45; left: 0; right: 0;
  top: var(--ui-header-h); bottom: 0;
  background: var(--cp-asfalto); color: var(--cp-cal);
  overflow-y: auto; overscroll-behavior: contain;
  opacity: 0; transform: translateY(-8px); visibility: hidden;
  transition: opacity 240ms var(--ui-ease), transform 320ms var(--ui-ease), visibility 0s linear 320ms;
}
.menu-panel.is-open {
  opacity: 1; transform: none; visibility: visible;
  transition: opacity 240ms var(--ui-ease), transform 320ms var(--ui-ease), visibility 0s;
}
.menu-panel__group { border-bottom: 1px solid var(--cp-grafite); }
.menu-panel__label {
  display: block; padding: 24px 24px 8px;
  font: 500 10px/1 var(--cp-font-data); letter-spacing: .08em; text-transform: uppercase;
  color: var(--cp-cimento);
}
.menu-panel__grid { display: grid; grid-template-columns: 1fr 1fr; }
.menu-panel__grid a {
  display: flex; gap: 14px; align-items: baseline; min-height: 64px;
  padding: 18px 24px; color: var(--cp-cal); text-decoration: none;
  font: 600 16px/1.3 var(--cp-font-body);
  border-top: 1px solid var(--cp-grafite);
}
.menu-panel__grid a:nth-child(odd) { border-right: 1px solid var(--cp-grafite); }
.menu-panel__grid a b {
  font: 500 11px/1 var(--cp-font-data); color: var(--cp-cimento); flex-shrink: 0; width: 20px;
}
.menu-panel__grid a.is-active { color: var(--cp-coral); }
.menu-panel__grid a.is-active b { color: var(--cp-coral); }
.menu-panel__foot {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 24px; font: 500 10px/1.5 var(--cp-font-data); letter-spacing: .05em;
  text-transform: uppercase; color: var(--cp-cimento);
}
.menu-panel__foot a {
  font: 700 15px/1 var(--cp-font-body); letter-spacing: 0; text-transform: none;
  color: var(--cp-coral); text-decoration: none; min-height: 48px; display: inline-flex; align-items: center;
}
.menu-panel :focus-visible { outline: 2px solid var(--cp-cal); outline-offset: -4px; box-shadow: none; }

/* ---------- Index rail (desktop) ---------- */
.index-rail {
  position: fixed; z-index: 20;
  top: var(--ui-header-h); bottom: 0; left: 0; width: var(--ui-rail-w);
  padding: 32px 24px 24px; overflow-y: auto;
  background: var(--cp-cal); border-right: 1px solid var(--cp-linha);
  display: flex; flex-direction: column;
}
.index-rail__label {
  font: 500 10px/1 var(--cp-font-data); letter-spacing: .08em; text-transform: uppercase;
  color: var(--cp-apoio); padding-bottom: 14px; border-bottom: 1px solid var(--cp-linha);
}
.index-rail__group {
  font: 500 9px/1 var(--cp-font-data); letter-spacing: .08em; text-transform: uppercase;
  color: var(--cp-apoio); margin: 22px 0 6px;
}
.index-rail nav a {
  position: relative; display: flex; gap: 12px; align-items: center;
  min-height: 34px; padding: 6px 0 6px 14px; text-decoration: none;
  font-size: 13px; line-height: 1.3; color: var(--cp-apoio);
  transition: color 160ms var(--ui-ease);
}
.index-rail nav a b { font: 500 10px/1 var(--cp-font-data); width: 18px; flex-shrink: 0; }
.index-rail nav a::before {
  content: ''; position: absolute; left: 0; top: 50%; width: 3px; height: 0;
  background: var(--cp-coral); transform: translateY(-50%);
  transition: height 200ms var(--ui-ease);
}
.index-rail nav a:hover { color: var(--cp-asfalto); }
.index-rail nav a.is-active { color: var(--cp-asfalto); font-weight: 700; }
.index-rail nav a.is-active::before { height: 20px; }
.index-rail__foot {
  margin-top: auto; padding-top: 24px;
  font: 500 9px/1.8 var(--cp-font-data); letter-spacing: .05em; color: var(--cp-apoio);
}

/* ---------- Main and section bands ---------- */
main { margin: 0; padding: 0; }
.sheet {
  max-width: none; min-height: 0; margin: 0; overflow: visible;
  padding: 112px max(var(--ui-gutter), calc((100% - var(--ui-frame)) / 2)) 40px;
  background: var(--cp-cal);
  border-top: 1px solid var(--cp-linha);
  scroll-margin-top: 0;
}
.sheet.cover { border-top: 0; padding-top: 72px; padding-bottom: 48px; background: var(--cp-asfalto); }
.sheet:nth-of-type(even):not(.cover) { background: var(--cp-cal); }

.section-head {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  column-gap: 64px; align-items: end; margin-bottom: 64px;
}
.section-head .eyebrow {
  grid-column: 1 / -1; margin-bottom: 20px;
  display: inline-flex; align-items: center; gap: 10px; color: var(--cp-apoio);
}
.section-head .eyebrow::before {
  content: ''; width: 10px; height: 10px; background: var(--cp-coral); flex-shrink: 0;
}
h2 { font-size: clamp(34px, 4.4vw, 64px); line-height: 1.02; letter-spacing: -.05em; max-width: none; }
.section-head .intro { margin-top: 0; max-width: 460px; justify-self: end; font-size: 18px; }

.page-foot {
  position: static; margin-top: 88px;
  font-size: 10px; letter-spacing: .05em;
}

/* Cover */
.cover-top { padding-bottom: 24px; border-bottom: 1px solid var(--cp-grafite); }
.cover-grid { margin-top: 56px; gap: 48px; }
.cover-copy h1 { font-size: clamp(44px, 6.2vw, 96px); line-height: .94; }
.cover-copy p { font-size: clamp(18px, 1.5vw, 22px); }
.cover-image { height: clamp(380px, 38vw, 580px); }
.cover .page-foot { margin-top: 56px; }

/* Content tune-ups for wider bands */
.routes h3 { font-size: clamp(34px, 3.4vw, 52px); }
.palette { grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); }
.swatch > span { height: 88px; transition: transform 160ms var(--ui-ease); }
.swatch:active > span { transform: scale(.97); }
.cp-button { transition: box-shadow 120ms ease, transform 140ms var(--ui-ease); }
.cp-button:active { transform: scale(.97); }

/* ---------- Site footer ---------- */
.site-footer { background: var(--cp-asfalto); color: var(--cp-concreto); }
.site-footer__inner {
  padding: 64px max(var(--ui-gutter), calc((100% - var(--ui-frame)) / 2)) 40px;
  display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end;
}
.site-footer__brand { display: flex; align-items: center; gap: 16px; color: var(--cp-cal); }
.site-footer__brand img { width: 44px; height: 50px; }
.site-footer__brand strong { font: 900 22px/1.05 var(--cp-font-display); letter-spacing: -.04em; }
.site-footer__links { display: flex; gap: 24px; flex-wrap: wrap; justify-content: flex-end; }
.site-footer__links a {
  color: var(--cp-cal); text-decoration: none; font: 600 15px/1 var(--cp-font-body);
  min-height: 48px; display: inline-flex; align-items: center;
}
.site-footer__links a:hover { color: var(--cp-coral); }
.site-footer__meta {
  grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 20px; border-top: 1px solid var(--cp-grafite);
  font: 500 10px/1.6 var(--cp-font-data); letter-spacing: .05em; text-transform: uppercase;
}
.site-footer__meta a { color: var(--cp-cal); text-decoration: none; }
.site-footer__meta a:hover { color: var(--cp-coral); }
.site-footer :focus-visible { outline: 2px solid var(--cp-cal); outline-offset: 2px; box-shadow: none; }

.toast { z-index: 60; }
.skip { z-index: 100; }

/* ---------- Desktop with rail ---------- */
@media (min-width: 1200px) {
  main, .site-footer { margin-left: var(--ui-rail-w); }
  .sheet { padding-left: max(56px, calc((100% - var(--ui-frame)) / 2)); padding-right: max(56px, calc((100% - var(--ui-frame)) / 2)); }
  .site-footer__inner { padding-left: 56px; padding-right: 56px; }
}

/* ---------- Below rail: hamburger ---------- */
@media (max-width: 1199px) {
  .index-rail { display: none; }
  .site-nav { display: none; }
  .site-cta { display: none; }
  .menu-toggle { display: inline-block; }
  .site-current { display: block; }
}
@media (min-width: 1200px) {
  .menu-panel { display: none; }
}

/* ---------- Tablet ---------- */
@media (max-width: 1023px) {
  :root { --ui-gutter: 32px; }
  .sheet { padding-top: 88px; }
  .section-head { grid-template-columns: 1fr; margin-bottom: 48px; }
  .section-head .intro { justify-self: start; max-width: 640px; margin-top: 20px; }
  .cover-grid { grid-template-columns: 1fr; gap: 32px; }
  .cover-image { height: auto; aspect-ratio: 16 / 10; }
  .cover-image .photo { object-fit: cover; }
  .logo-variants { grid-template-columns: repeat(2, 1fr); }
  .type-specimens { grid-template-columns: 1fr 1fr; }
  .b2b-layout, .arena-anatomy { grid-template-columns: 1fr; gap: 32px; }
  .business-state { padding: 0; }
  .product-hero { grid-template-columns: 1fr; }
  .product-hero > div:last-child { min-height: 0; height: 320px; }
  .photo-gallery { grid-template-columns: 1fr; }
  .photo-gallery > figure .photo { height: auto; max-height: 460px; }
  .campaign-layout { grid-template-columns: 1fr 1fr; }
  .campaign-spec { grid-column: 1 / -1; }
  .button-demo { grid-template-columns: 1fr; gap: 32px; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__links { justify-content: flex-start; }
}

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  :root { --ui-header-h: 64px; --ui-gutter: 20px; }
  .site-header__inner { padding: 0 20px; gap: 12px; }
  .site-brand__tag { display: none; }
  .site-brand strong { font-size: 13px; }
  .site-brand img { width: 26px; height: 30px; }
  .menu-panel__grid { grid-template-columns: 1fr; }
  .menu-panel__grid a:nth-child(odd) { border-right: 0; }
  .menu-panel__label, .menu-panel__grid a, .menu-panel__foot { padding-left: 20px; padding-right: 20px; }
  .sheet { padding-top: 64px; padding-bottom: 28px; }
  .sheet.cover { padding-top: 40px; }
  .section-head { margin-bottom: 36px; }
  h2 { font-size: clamp(28px, 8.4vw, 40px); line-height: 1.06; }
  .section-head .intro { font-size: 17px; }
  .page-foot { margin-top: 56px; font-size: 9px; flex-wrap: wrap; }
  .page-foot span { max-width: none; }
  .cover-copy h1 { font-size: clamp(38px, 11.5vw, 60px); }
  .cover-image { aspect-ratio: 4 / 3; }
  .type-specimens { grid-template-columns: 1fr; }
  .type-scale { grid-template-columns: repeat(2, 1fr); }
  .palette { grid-template-columns: repeat(3, 1fr); gap: 20px 12px; }
  .swatch > span { height: 64px; }
  .campaign-layout { display: flex; flex-direction: column; }
  .site-footer__inner { padding-top: 48px; }
  .site-footer__meta { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .menu-panel, .menu-panel.is-open { transition: none; transform: none; }
  .read-progress { display: none; }
}

@media print {
  .site-header, .index-rail, .menu-panel, .site-footer { display: none !important; }
  main { margin: 0 !important; }
  .sheet { border-top: 0; padding: 54px 64px 82px !important; }
  .page-foot { position: absolute; margin: 0; }
}

/* Cover refinements */
.cover-copy h1 { font-size: clamp(44px, 4.7vw, 84px); }
.cover-image .photo { object-fit: cover; }
@media (max-width: 640px) {
  .cover-copy h1 { font-size: clamp(38px, 11.5vw, 60px); }
  .cover-top .symbol, .cover-top .brand-name { display: none; }
  .cover-top { padding-bottom: 16px; }
  .cover-top > .eyebrow { margin-left: 0; text-align: left; }
  .cover-grid { margin-top: 32px; }
}