/**
 * ===============================================================================
 * ARQUIVO: app/static/css/components.css
 * CAMADA: Estilização / Componentes reutilizáveis
 * PAPEL NO SISTEMA:
 *   - Botões (.btn, .btn-primary, .btn-ghost, .icon-btn) — usam "all: unset" para
 *     não herdar o estilo padrão de botões do Pico.
 *   - Filtros: chips de fase (.chip) e switch "Somente com gabarito" (.filter-switch).
 *   - Acervo: bloco por vestibular (.vest-block), grupo por fase (.group),
 *     grade de cards (.exam-grid / .exam-card) e links de documentos (.doc).
 *       * O ano no card é um link "esticado" (.stretched) — o card inteiro abre a prova;
 *         os links de Gabarito/Resolução ficam acima dele (z-index).
 *       * Documentos ausentes aparecem tracejados (.doc.is-missing).
 *   - Estados: vazio (.empty), erro (.state-error), carregamento (.skeleton).
 *   - Notificações (.toasts / .toast) e spinner de carregamento.
 *   - A cor de cada vestibular chega via variável CSS --c (definida no JS).
 * ===============================================================================
 */

/* ================================ BOTÕES ================================ */
.btn {
  all: unset;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 40px;
  padding: 0 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.86rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
    color var(--fast) var(--ease), transform var(--fast) var(--ease);
}
.btn .icon { width: 16px; height: 16px; }
.btn:focus-visible { outline: 2px solid var(--accent-line); outline-offset: 2px; }
.btn:active { transform: translateY(1px); }
.btn:disabled,
.btn[aria-busy="true"] { opacity: 0.6; cursor: progress; transform: none; }

.btn-primary {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
}
.btn-primary:hover { background: rgba(143, 179, 166, 0.16); color: var(--text-strong); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }

.icon-btn {
  all: unset;
  box-sizing: border-box;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--faint);
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.icon-btn .icon { width: 16px; height: 16px; }
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn:focus-visible { outline: 2px solid var(--accent-line); }

.spinner {
  display: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-right-color: transparent;
  animation: spin 0.7s linear infinite;
}
[aria-busy="true"] > .spinner { display: inline-block; }

/* ================================ FILTROS ================================ */
.filters {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  min-height: 34px;
  margin-bottom: 2rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--border);
}

.filters-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  min-width: 0;
}

.chip {
  all: unset;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 32px;
  padding: 0 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: all var(--fast) var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--border-strong); }
.chip:focus-visible { outline: 2px solid var(--accent-line); outline-offset: 2px; }
.chip.is-active {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text-strong);
}
.chip-count {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: var(--faint);
}

.filter-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0 auto;
  font-size: 0.82rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  min-height: 32px;
  white-space: nowrap;
}
.filter-switch input[type="checkbox"][role="switch"] {
  margin: 0;
  width: 2.2rem;
  height: 1.25rem;
  border-width: 2px;
  cursor: pointer;
}

/* ================================ ACERVO ================================ */
.vest-block {
  margin-bottom: 3rem;
  animation: fade var(--normal) var(--ease) both;
}

.vest-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 1.25rem;
}
.vest-name {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c, var(--text-strong));
  cursor: pointer;
  display: inline-block;
  transition: opacity var(--fast) var(--ease);
}
.vest-name:hover {
  opacity: 0.82;
}
.vest-name:focus-visible {
  outline: 2px solid var(--c, var(--accent-line));
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}
.vest-meta { margin: 0.1rem 0 0; font-size: 0.78rem; color: var(--faint); }
.vest-open {
  all: unset;
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--faint);
  cursor: pointer;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-xs);
  transition: color var(--fast), background var(--fast);
}
.vest-open:hover { color: var(--text); background: var(--surface); }
.vest-open:focus-visible { outline: 2px solid var(--accent-line); }

.group { margin-bottom: 1.9rem; }
.group:last-child { margin-bottom: 0; }

.group-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.8rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}
.group-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}
.group-count {
  font-weight: 500;
  letter-spacing: 0;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.85rem;
}

.exam-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.85rem;
  min-height: 124px;
  padding: 0.9rem 1rem 0.85rem 1.05rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform var(--normal) var(--ease), border-color var(--normal) var(--ease),
    background var(--normal) var(--ease), box-shadow var(--normal) var(--ease);
  animation: rise 360ms var(--ease) both;
  animation-delay: calc(var(--i, 0) * 16ms);
  box-sizing: border-box;
}
.exam-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: var(--c, var(--accent));
  opacity: 0.45;
  transition: opacity var(--normal), top var(--normal), bottom var(--normal);
}
.exam-card:hover {
  transform: translateY(-2px);
  background: var(--surface-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.exam-card:hover::before { opacity: 0.9; top: 12px; bottom: 12px; }
.exam-card:has(.stretched:focus-visible) {
  outline: 2px solid var(--accent-line);
  outline-offset: 2px;
}
.exam-card.is-new {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 4px var(--accent-softer), var(--shadow);
}

.exam-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.exam-year {
  display: block;
  font-size: clamp(1.35rem, 3.5vw, 1.55rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--text-strong);
  text-decoration: none;
  word-break: break-word;
}
.exam-year:hover { text-decoration: none; color: var(--text-strong); }
.exam-year--text { font-size: 1rem; letter-spacing: -0.01em; line-height: 1.25; }

/* Link esticado: todo o card abre a prova */
.stretched::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 1;
}
.stretched:focus-visible { outline: none; }

.exam-sub {
  margin-top: 0.35rem;
  font-size: 0.74rem;
  color: var(--faint);
}

.exam-open {
  color: var(--faint);
  opacity: 0;
  transform: translate(-3px, 3px);
  transition: opacity var(--normal) var(--ease), transform var(--normal) var(--ease);
}
.exam-open .icon { width: 15px; height: 15px; }
.exam-card:hover .exam-open { opacity: 1; transform: none; }

.exam-actions {
  position: relative;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  width: 100%;
}

.doc {
  position: relative;
  z-index: 6;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  gap: 0.35rem;
  min-height: 29px;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  box-sizing: border-box;
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
    color var(--fast) var(--ease);
}
.doc .icon { width: 13px; height: 13px; opacity: 0.65; flex-shrink: 0; }
.doc:hover {
  text-decoration: none;
  color: var(--text-strong);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}
.doc:hover .icon { opacity: 1; color: var(--accent); }
.doc:focus-visible { outline: 2px solid var(--accent-line); outline-offset: 1px; }
.doc.is-missing {
  color: var(--faint);
  background: transparent;
  border-style: dashed;
  cursor: default;
}
.doc.is-missing:hover { border-color: var(--border); background: transparent; color: var(--faint); }

/* ================================ ESTADOS ================================ */
.empty,
.state-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.4rem;
  padding: 4.5rem 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  color: var(--muted);
  animation: fade var(--normal) var(--ease) both;
}
.empty > .icon,
.state-error > .icon {
  width: 30px;
  height: 30px;
  margin-bottom: 0.6rem;
  color: var(--faint);
}
.empty h3,
.state-error h3 { margin: 0; font-size: 1rem; font-weight: 600; color: var(--text); }
.empty p,
.state-error p { margin: 0 0 1rem; font-size: 0.86rem; max-width: 38ch; }
.state-error > .icon { color: var(--danger); }

.skeleton {
  display: block;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--surface) 0%, var(--surface-2) 50%, var(--surface) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}
.skeleton-row { height: 34px; margin-bottom: 4px; }
.skeleton-title { width: 140px; height: 12px; margin: 0 0 1rem; }
.skeleton-card { height: 128px; border-radius: var(--radius); }

/* ================================ TOASTS ================================ */
.toasts {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right, 1.25rem));
  bottom: max(1.25rem, env(safe-area-inset-bottom, 1.25rem));
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  min-width: 260px;
  max-width: 380px;
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  font-size: 0.84rem;
  color: var(--text);
  pointer-events: auto;
  animation: rise var(--normal) var(--ease) both;
  transition: opacity var(--normal) var(--ease), transform var(--normal) var(--ease);
}
.toast > .icon { width: 17px; height: 17px; margin-top: 1px; color: var(--accent); flex-shrink: 0; }
.toast--error > .icon { color: var(--danger); }
.toast-body { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.toast-body strong { font-weight: 600; color: var(--text-strong); }
.toast-body span { color: var(--muted); font-size: 0.78rem; word-break: break-word; }
.toast.is-leaving { opacity: 0; transform: translateY(6px); }

@media (max-width: 768px) {
  .exam-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
  }
  .filter-switch {
    margin-left: 0;
    width: 100%;
    padding-top: 0.2rem;
  }
}

@media (max-width: 560px) {
  .exam-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.6rem;
  }
  .exam-card {
    padding: 0.8rem 0.85rem 0.75rem 0.9rem;
    min-height: 116px;
    gap: 0.7rem;
  }
  .toasts {
    left: 1rem;
    right: 1rem;
    bottom: max(1rem, env(safe-area-inset-bottom, 1rem));
  }
  .toast {
    max-width: none;
    min-width: 0;
  }
}

@media (max-width: 340px) {
  .exam-grid {
    grid-template-columns: 1fr;
  }
}