/* =========================================================
   CUBO CMC — Sistema Visual do Protótipo
   Fonte: specs/design.md (paleta, tipografia, princípio "caos controlado")
   ========================================================= */

:root {
  --c-black: #0A0A0A;
  --c-white: #F5F5F2;
  --c-graphite: #171717;
  --c-gray: #8A8A8A;
  --c-accent: #3D8BFF;

  --font-display: "Anton", Impact, "Arial Narrow Bold", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1240px;
  --radius: 2px;
  --border: 1px solid rgba(245, 245, 242, 0.14);
  --transition: 180ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-offset, 110px); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -60px; background: var(--c-accent); color: var(--c-black);
  padding: 10px 16px; font-weight: 700; z-index: 999; transition: top var(--transition);
  border-radius: 0 0 4px 4px;
}
.skip-link:focus { top: 0; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

body {
  margin: 0;
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  line-height: 1.05;
  margin: 0 0 0.4em;
}

h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.4vw, 1.6rem); }

p { margin: 0 0 1em; color: var(--c-gray); }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 600;
  margin-bottom: 0.6em;
  display: inline-block;
}

.placeholder-flag {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-black);
  background: var(--c-accent);
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 700;
  margin-left: 8px;
  vertical-align: middle;
}

.proto-banner {
  background: var(--c-accent);
  color: var(--c-black);
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 8px 16px;
}
.proto-banner strong { text-transform: uppercase; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--c-accent); color: var(--c-black); }
.btn-primary:hover { background: #5DA3FF; }
.btn-outline { background: transparent; color: var(--c-white); border-color: rgba(245,245,242,0.4); }
.btn-outline:hover { border-color: var(--c-white); }
.btn-ghost { background: transparent; color: var(--c-gray); }
.btn-ghost:hover { color: var(--c-white); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(8px);
  border-bottom: var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}
.brand img {
  height: 40px;
  width: 40px;
  object-fit: contain;
  filter: invert(1) brightness(1.05);
}
.brand span.tag {
  display: block;
  font-family: var(--font-body);
  font-size: 0.55rem;
  letter-spacing: 0.14em;
  color: var(--c-gray);
  text-transform: uppercase;
  font-weight: 600;
}
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-white);
  opacity: 0.82;
  transition: opacity var(--transition), color var(--transition);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover, .main-nav a.active { opacity: 1; color: var(--c-accent); }
.header-actions { display: flex; align-items: center; gap: 18px; }
.header-actions button.icon-btn {
  background: none; border: none; color: var(--c-white); font-size: 1.1rem; position: relative;
}
.cart-count {
  position: absolute; top: -6px; right: -10px;
  background: var(--c-accent); color: var(--c-black);
  font-size: 0.62rem; font-weight: 800;
  width: 16px; height: 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.nav-toggle { display: none; background: none; border: none; color: var(--c-white); font-size: 1.4rem; }

@media (max-width: 860px) {
  .main-nav { position: fixed; top: 76px; left: 0; right: 0; bottom: 0; background: var(--c-black); flex-direction: column; align-items: flex-start; padding: 28px 20px; gap: 22px; transform: translateX(100%); transition: transform 220ms ease; overflow-y: auto; }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { font-size: 1.1rem; width: 100%; }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-bottom: var(--border);
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center 18%;
  filter: saturate(1.05);
}
.hero-scrim {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,10,10,0.15) 0%, rgba(10,10,10,0.55) 55%, rgba(10,10,10,0.96) 100%);
}
.hero-content {
  position: relative;
  padding: 60px 0 64px;
  width: 100%;
}
.hero-content h1 { max-width: 900px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 20px; margin-bottom: 36px; flex-wrap: wrap;
}
.section-head p { margin: 0; max-width: 560px; }

.bg-graphite { background: var(--c-graphite); }
.bordered-top { border-top: var(--border); }
.bordered-bottom { border-bottom: var(--border); }

/* ---------- Product grid / cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
@media (max-width: 1080px) { .grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .grid { grid-template-columns: repeat(2, 1fr); gap: 14px; } }
@media (max-width: 460px) { .grid { grid-template-columns: 1fr; } }

.card {
  display: block;
  background: var(--c-graphite);
  border: var(--border);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-4px); border-color: rgba(61,139,255,0.5); }
.card-media { aspect-ratio: 3/4; overflow: hidden; background: #000; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 420ms ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-body { padding: 14px 14px 18px; }
.card-collection { font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-accent); font-weight: 700; }
.card-title { font-family: var(--font-display); font-size: 1.05rem; text-transform: uppercase; margin: 4px 0 8px; letter-spacing: 0.01em; }
.card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem; color: var(--c-gray); }
.card-price { color: var(--c-white); font-weight: 700; }

/* ---------- Filters ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.filter-pill {
  font-size: 0.74rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  padding: 9px 16px; border: 1px solid rgba(245,245,242,0.25); border-radius: 999px;
  color: var(--c-white); background: transparent; transition: all var(--transition);
}
.filter-pill.active, .filter-pill:hover { background: var(--c-accent); color: var(--c-black); border-color: var(--c-accent); }

.empty-state {
  border: 1px dashed rgba(245,245,242,0.3);
  padding: 60px 24px;
  text-align: center;
  color: var(--c-gray);
}

/* ---------- Product detail ---------- */
.product-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: flex-start; }
@media (max-width: 900px) { .product-layout { grid-template-columns: 1fr; gap: 30px; } }
.product-media { background: #000; border: var(--border); aspect-ratio: 3/4; overflow: hidden; position: sticky; top: 96px; }
.product-media img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 900px) { .product-media { position: static; } }

.product-price { font-family: var(--font-display); font-size: 1.8rem; color: var(--c-accent); margin: 10px 0 20px; }
.option-group { margin-bottom: 26px; }
.option-label { display: flex; justify-content: space-between; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-gray); margin-bottom: 10px; }
.size-grid { display: flex; gap: 8px; flex-wrap: wrap; }
.size-btn {
  min-width: 48px; padding: 10px 12px; text-align: center;
  border: 1px solid rgba(245,245,242,0.3); background: transparent; color: var(--c-white);
  font-size: 0.82rem; font-weight: 600; transition: all var(--transition);
}
.size-btn.selected, .size-btn:hover { border-color: var(--c-accent); color: var(--c-accent); }

.accordion-item { border-top: var(--border); padding: 16px 0; }
.accordion-item:last-child { border-bottom: var(--border); }
.accordion-item summary { cursor: pointer; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.03em; text-transform: uppercase; list-style: none; display: flex; justify-content: space-between; }
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::after { content: "+"; color: var(--c-accent); font-size: 1.1rem; }
.accordion-item[open] summary::after { content: "\2212"; }
.accordion-item p, .accordion-item ul { margin-top: 12px; font-size: 0.9rem; }
.accordion-item li { color: var(--c-gray); margin-bottom: 4px; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--c-white); color: var(--c-black); padding: 14px 22px; border-radius: 4px;
  font-size: 0.85rem; font-weight: 600; opacity: 0; pointer-events: none;
  transition: all 260ms ease; z-index: 200; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Manifesto / About ---------- */
.manifesto { max-width: 760px; }
.manifesto p { color: var(--c-white); opacity: 0.85; font-size: 1.05rem; }

/* ---------- Newsletter / CTA band ---------- */
.cta-band {
  background: var(--c-accent);
  color: var(--c-black);
  padding: 64px 0;
  text-align: center;
}
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { color: rgba(10,10,10,0.75); max-width: 520px; margin: 0 auto 26px; }
.newsletter-form { display: flex; gap: 10px; max-width: 420px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.newsletter-form input {
  flex: 1; min-width: 220px; padding: 14px 16px; border: 2px solid var(--c-black); border-radius: 2px;
  font-family: var(--font-body); font-size: 0.9rem; background: var(--c-white);
}
.newsletter-form .btn-primary { background: var(--c-black); color: var(--c-white); }
.newsletter-form .btn-primary:hover { background: #262626; }

/* ---------- Mosaic (Universo Visual) ---------- */
.mosaic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 160px;
  gap: 10px;
}
.mosaic-item { overflow: hidden; background: #000; border: var(--border); }
.mosaic-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 420ms ease; }
.mosaic-item:hover img { transform: scale(1.08); }
.mosaic-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.mosaic-item:nth-child(6) { grid-column: span 2; grid-row: span 2; }
@media (max-width: 760px) {
  .mosaic-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 140px; }
  .mosaic-item:nth-child(1), .mosaic-item:nth-child(6) { grid-column: span 2; grid-row: span 1; }
}

/* ---------- Circular Gallery (CMC Gallery) ---------- */
.circular-gallery { position: relative; }
.circular-gallery-stage {
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1400px;
}
.circular-gallery-track {
  position: relative;
  width: 210px;
  height: 280px;
  transform-style: preserve-3d;
  will-change: transform;
}
.circular-gallery-item {
  position: absolute;
  inset: 0;
  display: block;
  background: var(--c-graphite);
  border: var(--border);
  overflow: hidden;
  backface-visibility: hidden;
}
.circular-gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.circular-gallery-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 12px 12px;
  background: linear-gradient(180deg, transparent, rgba(10,10,10,0.92) 68%);
  display: flex; flex-direction: column; gap: 2px;
}
.circular-gallery-caption strong { font-family: var(--font-display); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.01em; }
.circular-gallery-caption em { font-style: normal; font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-accent); }
.circular-gallery-controls { display: flex; justify-content: center; gap: 12px; margin-top: 24px; }
.gallery-nav-btn {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(245,245,242,0.3); background: transparent; color: var(--c-white);
  font-size: 1.1rem; transition: all var(--transition);
}
.gallery-nav-btn:hover, .gallery-nav-btn:focus-visible { border-color: var(--c-accent); color: var(--c-accent); }

@media (max-width: 760px) {
  .circular-gallery-stage { height: 320px; }
  .circular-gallery-track { width: 160px; height: 220px; }
}

@media (prefers-reduced-motion: reduce) {
  .circular-gallery-track { transition: none; }
}

/* ---------- Community placeholder ---------- */
.community-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 760px) { .community-grid { grid-template-columns: 1fr; } }
.community-card { border: var(--border); background: var(--c-graphite); padding: 28px; text-align: center; }
.community-card .icon { font-size: 1.8rem; margin-bottom: 10px; display: block; }

/* ---------- Archive ---------- */
.archive-edition {
  border: var(--border); background: var(--c-graphite);
  display: grid; grid-template-columns: 220px 1fr; gap: 30px; padding: 30px; align-items: center;
}
@media (max-width: 700px) { .archive-edition { grid-template-columns: 1fr; } }
.archive-number { font-family: var(--font-display); font-size: 4rem; color: var(--c-accent); line-height: 1; }

/* ---------- Footer ---------- */
.site-footer { border-top: var(--border); padding: 60px 0 30px; background: var(--c-black); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px; margin-bottom: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-col h4 { font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-accent); margin-bottom: 16px; }
.footer-col a, .footer-col p { display: block; font-size: 0.86rem; color: var(--c-gray); margin-bottom: 10px; }
.footer-col a:hover { color: var(--c-white); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; border-top: var(--border); font-size: 0.76rem; color: var(--c-gray); }

/* ---------- Utility page content (FAQ, Policies, Contact) ---------- */
.prose { max-width: 760px; }
.prose h2 { margin-top: 44px; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--c-gray); font-size: 0.96rem; }
.prose li { margin-bottom: 6px; }

.faq-item { border-top: var(--border); padding: 18px 0; }
.faq-item:last-child { border-bottom: var(--border); }
.faq-item summary { cursor: pointer; font-weight: 700; font-size: 0.98rem; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p { margin-top: 10px; }

.contact-form { display: grid; gap: 16px; max-width: 520px; }
.contact-form label { font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-gray); margin-bottom: 6px; display: block; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 14px; background: var(--c-graphite); border: 1px solid rgba(245,245,242,0.2);
  color: var(--c-white); font-family: var(--font-body); border-radius: 2px;
}
.contact-form textarea { min-height: 120px; resize: vertical; }