/* ============================================================
   BECCARI — Fernando Brandão, Designer
   Styleguide / Design Tokens
   ============================================================ */

:root {
  /* ---- Cores ---- */
  --color-bg:        #FFFFFF;
  --color-surface:   #F7F7F6;
  --color-ink:       #141414;  /* títulos, ações primárias */
  --color-text:      #4B4B4B;  /* corpo de texto */
  --color-muted:     #8C8C8C;  /* legendas, metadados */
  --color-line:      #E7E7E5;  /* divisores, bordas */
  --color-accent:    #0BA45D;  /* verde MedRoom — uso pontual */
  --color-accent-dk: #07854A;
  --color-focus:     #1A6BFF;

  /* ---- Tipografia ---- */
  --font-sans: "Helvetica Neue", Helvetica, Inter, Arial, system-ui, sans-serif;

  --text-xs:   0.75rem;   /* 12 — legendas, tags        */
  --text-sm:   0.8125rem; /* 13 — nav, metadados        */
  --text-base: 0.9375rem; /* 15 — corpo                 */
  --text-md:   1.125rem;  /* 18 — destaques             */
  --text-lg:   1.5rem;    /* 24 — título de seção       */
  --text-xl:   2rem;      /* 32 — título de projeto     */

  --leading-tight: 1.2;
  --leading-base:  1.65;

  --tracking-wide: 0.08em;

  /* ---- Espaçamento (escala 4pt) ---- */
  --space-1: 0.25rem;  /*  4 */
  --space-2: 0.5rem;   /*  8 */
  --space-3: 0.75rem;  /* 12 */
  --space-4: 1rem;     /* 16 */
  --space-5: 1.5rem;   /* 24 */
  --space-6: 2rem;     /* 32 */
  --space-7: 3rem;     /* 48 */
  --space-8: 4rem;     /* 64 */
  --space-9: 6rem;     /* 96 */
  --space-10: 8rem;    /* 128 */

  /* ---- Layout ---- */
  --container: 76rem;       /* 1216px */
  --label-col: 11rem;       /* coluna de rótulos das seções */
  --radius-sm: 4px;
  --radius-md: 8px;

  /* ---- Transições ---- */
  --ease: 180ms ease;
}

/* ---- Reset básico ---- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-base);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

h1, h2, h3 { color: var(--color-ink); line-height: var(--leading-tight); margin: 0; }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a { color: var(--color-ink); }

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  padding: var(--space-6) 0;
}
.site-header .container {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
}
.brand { text-decoration: none; }
.brand strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-ink);
}
.brand span {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.site-nav {
  display: flex;
  gap: var(--space-6);
}

/* Link de navegação — estados */
.nav-link {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.nav-link:hover { color: var(--color-ink); border-bottom-color: var(--color-ink); }
.nav-link:active { color: var(--color-accent-dk); border-bottom-color: var(--color-accent-dk); }
.nav-link[aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
  border-bottom-color: var(--color-ink);
}
.nav-link.is-disabled {
  color: var(--color-line);
  pointer-events: none;
  cursor: not-allowed;
}

/* ============================================================
   Botões — estados: default / hover / active / focus / disabled
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--ease), color var(--ease),
              border-color var(--ease), transform var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn.is-disabled {
  pointer-events: none;
  opacity: 0.4;
}

/* Primário */
.btn--primary { background: var(--color-ink); color: #fff; }
.btn--primary:hover { background: #000; }
.btn--primary:active { background: var(--color-accent-dk); }

/* Secundário */
.btn--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn--secondary:hover { background: var(--color-ink); color: #fff; }
.btn--secondary:active { background: var(--color-accent-dk); border-color: var(--color-accent-dk); color: #fff; }

/* Ghost / texto */
.btn--ghost { background: transparent; color: var(--color-text); padding-left: var(--space-2); padding-right: var(--space-2); }
.btn--ghost:hover { color: var(--color-ink); background: var(--color-surface); }
.btn--ghost:active { color: var(--color-accent-dk); }

/* ============================================================
   Tabs de plataforma (VR I / VR II / VR IA / PC / MOBILE)
   ============================================================ */
.platform-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-3) 0;
  margin: var(--space-8) 0;
}
.tab {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: color var(--ease), background-color var(--ease);
}
.tab:hover { color: var(--color-ink); background: var(--color-surface); }
.tab:active { color: var(--color-accent-dk); }
.tab[aria-current="page"] {
  color: #fff;
  background: var(--color-ink);
  font-weight: 700;
}

/* ============================================================
   Hero do projeto
   ============================================================ */
.project-hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--space-7);
  align-items: start;
  margin-top: var(--space-6);
}
.project-meta h1 {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}
.project-tags {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-5);
}
.meta-list {
  margin: 0;
  font-size: var(--text-sm);
  display: grid;
  gap: var(--space-2);
}
.meta-list div { display: grid; grid-template-columns: 7rem 1fr; gap: var(--space-3); }
.meta-list dt { color: var(--color-muted); margin: 0; }
.meta-list dd { color: var(--color-text); margin: 0; }

/* ============================================================
   Seções do estudo de caso
   ============================================================ */
.case-section {
  display: grid;
  grid-template-columns: var(--label-col) minmax(0, 1fr);
  gap: var(--space-7);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-line);
}
.case-section:first-of-type,
.platform-tabs + .case-section { border-top: 0; }
.case-section + .platform-tabs { margin-top: 0; }

.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-ink);
  position: sticky;
  top: var(--space-5);
  align-self: start;
}
.section-body { max-width: 46rem; }
.section-body ul { margin: 0 0 var(--space-4); padding-left: 1.1rem; }
.section-body li { margin-bottom: var(--space-3); }
.section-body a { color: var(--color-accent-dk); text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color var(--ease); }
.section-body a:hover { color: var(--color-ink); }

/* Figuras */
figure { margin: var(--space-6) 0; }
figure img {
  width: 100%;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
figcaption {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin-top: var(--space-2);
}
.figure-grid { display: grid; gap: var(--space-4); }
.figure-grid--2 { grid-template-columns: repeat(2, 1fr); }
.figure-grid--3 { grid-template-columns: repeat(3, 1fr); }
.figure-grid--5 { grid-template-columns: repeat(5, 1fr); }
.figure-grid img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-md); background: var(--color-surface); }

/* ============================================================
   Grid de projetos (home e rodapé)
   ============================================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin: var(--space-8) 0;
}
.work-card {
  position: relative;
  display: block;
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  background: var(--color-surface);
}
.work-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 320ms ease, opacity var(--ease);
}
.work-card .work-card__label {
  position: absolute;
  left: var(--space-4);
  bottom: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: #fff;
  background: rgba(20, 20, 20, 0.85);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--ease), transform var(--ease);
}
.work-card:hover img { transform: scale(1.02); }
.work-card:hover .work-card__label,
.work-card:focus-visible .work-card__label { opacity: 1; transform: translateY(0); }
.work-card:active img { opacity: 0.85; }

.work-card.is-coming-soon { cursor: default; }
.work-card.is-coming-soon img { filter: grayscale(0.15); }
.work-card.is-coming-soon:hover img { transform: none; }

/* ============================================================
   Rodapé
   ============================================================ */
.back-home {
  display: flex;
  justify-content: center;
  padding: var(--space-7) 0 var(--space-9);
}

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-6) 0 var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-muted);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}

/* ============================================================
   Styleguide (página de documentação)
   ============================================================ */
.sg-swatch-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr)); gap: var(--space-4); }
.sg-swatch { border: 1px solid var(--color-line); border-radius: var(--radius-md); overflow: hidden; }
.sg-swatch__color { height: 4.5rem; }
.sg-swatch__meta { padding: var(--space-3); font-size: var(--text-xs); }
.sg-swatch__meta strong { display: block; color: var(--color-ink); }
.sg-type-row { display: grid; grid-template-columns: 8rem 1fr; gap: var(--space-4); align-items: baseline; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-line); }
.sg-type-row code, .sg-space-row code { font-size: var(--text-xs); color: var(--color-muted); }
.sg-space-row { display: grid; grid-template-columns: 8rem 1fr; gap: var(--space-4); align-items: center; padding: var(--space-2) 0; }
.sg-space-bar { height: 0.75rem; background: var(--color-accent); border-radius: 2px; }
.sg-cluster { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; }

/* ============================================================
   Responsivo
   ============================================================ */
@media (max-width: 860px) {
  .project-hero { grid-template-columns: 1fr; gap: var(--space-5); }
  .case-section { grid-template-columns: 1fr; gap: var(--space-4); padding: var(--space-7) 0; }
  .section-label { position: static; }
  .figure-grid--3, .figure-grid--5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .work-grid { grid-template-columns: 1fr; }
  .figure-grid--2 { grid-template-columns: 1fr; }
  .site-header .container { flex-direction: column; gap: var(--space-4); }
  .meta-list div { grid-template-columns: 1fr; gap: 0; }
}

/* Tabs dentro de conteúdo (styleguide) mantêm sua cor própria */
.section-body .tab { color: var(--color-muted); text-decoration: none; }
.section-body .tab:hover { color: var(--color-ink); }
.section-body .tab[aria-current="page"] { color: #fff; }