/* ============================================================
   COMPONENTS — UI reutilizável (nav, footer, botões, cards…).
   Depende de tokens.css + base.css.
   Toda página herda estes componentes; ver DESIGN.md e spec.md.
   ============================================================ */

/* ---------- HEADER / NAV (injetado por components.js) ---------- */
/* Os wrappers data-chrome não geram caixa própria: assim o .site-header
   (position: sticky) tem o BODY como bloco contêiner e cola durante todo o
   scroll — sem isso, ele descolaria após a altura do próprio wrapper. */
[data-chrome="header"], [data-chrome="footer"] { display: contents; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--background) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--outline-variant);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--primary);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand__logo { height: 2rem; width: auto; }

.site-nav {
  display: none;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
}
.site-nav a {
  font-family: var(--font-mono);
  font-size: var(--label-md);
  letter-spacing: var(--tracking-wide);
  color: var(--on-surface-variant);
  text-decoration: none;
  padding-block: 0.35rem;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease);
}
.site-nav a:hover { color: var(--primary); text-decoration: none; }
.site-nav a[aria-current="page"] {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

.nav-toggle {
  display: inline-flex;
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  padding: 0.4rem;
}
@media (min-width: 768px) {
  .site-nav { display: flex; }
  .nav-toggle { display: none; }
}
/* menu mobile aberto */
.site-nav.is-open {
  display: flex;
  position: absolute;
  top: 4.5rem;
  left: 0;
  right: 0;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  background: var(--background);
  border-bottom: 1px solid var(--outline-variant);
  padding: 0.5rem var(--margin-mobile) 1rem;
}
.site-nav.is-open a { border-bottom: 1px solid var(--outline-variant); padding-block: 0.85rem; }

/* ---------- FOOTER ---------- */
.site-footer {
  flex-shrink: 0;
  background: var(--surface-container-low);
  border-top: 1px solid var(--outline-variant);
  padding-block: 2rem;
  margin-top: auto;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
}
.site-footer__brand { display: flex; flex-direction: column; gap: 0.35rem; }
.site-footer__name {
  font-family: var(--font-mono);
  font-size: var(--label-md);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--primary);
}
.site-footer__meta { font-size: var(--label-md); color: var(--on-surface-variant); }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.site-footer__links a {
  font-family: var(--font-mono);
  font-size: var(--label-md);
  color: var(--on-surface-variant);
}
.site-footer__links a:hover { color: var(--secondary); }

/* ---------- BOTÕES ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--label-md);
  letter-spacing: var(--tracking-wide);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--primary); color: var(--on-primary); }
.btn--primary:hover { background: var(--on-surface-variant); }
.btn--ghost { border-color: var(--outline); color: var(--primary); }
.btn--ghost:hover { background: var(--surface-container-low); }
.btn .material-symbols-outlined { font-size: 1.1em; transition: transform var(--dur) var(--ease); }
.btn:hover .material-symbols-outlined { transform: translateX(3px); }

/* ---------- CHIPS / TAGS ---------- */
.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: var(--tracking-wide);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  background: var(--surface-variant);
  color: var(--on-surface-variant);
}
.chip--code { background: var(--surface-container-high); }
.chip--soon {
  background: var(--tertiary-fixed);
  color: var(--on-tertiary-container);
  text-transform: uppercase;
}

/* ---------- CARD científico genérico ---------- */
.card {
  background: var(--paper-white);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
a.card:hover, .card--hover:hover {
  transform: translateY(-2px);
  border-color: var(--secondary);
  box-shadow: 0 4px 14px rgba(0,0,0,0.06);
  text-decoration: none;
}

/* ---------- HERO ---------- */
.hero { position: relative; overflow: hidden; }
.hero__bg {
  position: absolute; inset: 0;
  opacity: 0.3;
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; }
.hero h1 { margin-block: 1.25rem 1.5rem; }
.hero__lede {
  font-size: var(--body-lg);
  color: var(--on-surface-variant);
  max-width: 54ch;
  margin-bottom: 2rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- GRID de cartões ---------- */
.grid {
  display: grid;
  gap: var(--gutter);
  grid-template-columns: 1fr;
}
@media (min-width: 720px)  { .grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px)  { .grid--3 { grid-template-columns: repeat(3, 1fr); } }

.section-head { margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head p { color: var(--on-surface-variant); max-width: 52ch; margin-top: 0.75rem; }

/* ---------- CARD de área / disciplina ---------- */
.area-card { padding: 2rem; display: flex; flex-direction: column; gap: 1.25rem; }
.area-card__icon {
  width: 3rem; height: 3rem;
  display: grid; place-items: center;
  background: var(--surface-container);
  color: var(--secondary);
  border-radius: var(--radius);
}
.area-card__icon .material-symbols-outlined { font-size: 1.75rem; }
.area-card h3 { margin-bottom: 0.5rem; }
.area-card p { color: var(--on-surface-variant); }
.area-card__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; padding-top: 0.5rem; }

.discipline-card { padding: 2rem; position: relative; display: block; }
.discipline-card__top {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 1rem;
}
.discipline-card__top .material-symbols-outlined { color: var(--outline); transition: color var(--dur) var(--ease); }
a.discipline-card:hover .discipline-card__top .material-symbols-outlined { color: var(--secondary); }
.discipline-card h3 { margin-bottom: 0.5rem; }
.discipline-card p { color: var(--on-surface-variant); margin-bottom: 1.25rem; }
.discipline-card__meta {
  display: flex; align-items: center; gap: 0.75rem;
  font-family: var(--font-mono); font-size: var(--label-md); color: var(--secondary);
}
.discipline-card__meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--outline-variant); }

/* ---------- LISTA de materiais ---------- */
.material-list { list-style: none; display: grid; gap: 0.75rem; }
.material {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--paper-white);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  color: inherit;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
a.material:hover { border-color: var(--secondary); transform: translateX(3px); text-decoration: none; }
.material__icon {
  width: 2.75rem; height: 2.75rem;
  display: grid; place-items: center;
  border-radius: var(--radius);
  background: var(--surface-container);
  color: var(--secondary);
}
.material__body h4 { font-family: var(--font-display); font-size: 1.15rem; color: var(--primary); margin-bottom: 0.2rem; }
.material__body p { font-size: var(--label-md); color: var(--on-surface-variant); }
.material__type {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--on-surface-variant);
  white-space: nowrap;
}

/* ---------- FERRAMENTA (card) ---------- */
.tool-card { padding: 2rem; display: flex; flex-direction: column; gap: 0.75rem; height: 100%; }
.tool-card__top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 0.5rem; }
.tool-card__id {
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--on-surface-variant);
  padding: 0.15rem 0.5rem; border: 1px solid var(--outline-variant); border-radius: var(--radius-sm);
}
.tool-card h3 { margin-bottom: 0.25rem; }
.tool-card p { color: var(--on-surface-variant); flex-grow: 1; }
/* CTA do card: botao real, alinhado a esquerda e sem esticar na coluna flex */
.tool-card__cta { align-self: flex-start; margin-top: 1.25rem; }
.tool-card__cta .material-symbols-outlined { font-size: 1em; }
.tool-card__cta:hover .material-symbols-outlined { transform: none; }
.tool-card--soon { opacity: 0.75; }
.tool-card--soon h3 { color: var(--on-surface-variant); }

/* ---------- NOTA técnica (aviso IA/vibecoding) ---------- */
.note {
  border: 1px solid var(--outline-variant);
  background: color-mix(in srgb, var(--tertiary-fixed) 18%, var(--paper-white));
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  display: flex; gap: 0.75rem; align-items: flex-start;
  color: var(--on-tertiary-container);
  font-size: var(--body-md);
}
.note .material-symbols-outlined { color: var(--tertiary); flex-shrink: 0; }

/* ---------- estados vazio / carregando ---------- */
.state { padding: 2rem; text-align: center; color: var(--on-surface-variant); font-family: var(--font-mono); font-size: var(--label-md); }

/* ---------- animação de entrada ---------- */
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.reveal { animation: rise 0.6s var(--ease) both; }