/* ============================================================
   MERCÚRIO CASA 9 — Sistema de base
   Preto e branco. Papel e tinta. Livro e site fundidos.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400&display=swap');

:root {
  /* — Cor: papel e tinta, não branco/preto puros — */
  --paper:        #F7F4ED;
  --paper-dim:     #EFEBE0;
  --ink:          #18160F;
  --ink-soft:     #3A3730;
  --ink-faint:    #6B675C;
  --rule:         rgba(24, 22, 15, 0.16);
  --rule-strong:  rgba(24, 22, 15, 0.32);
  --wash:         rgba(24, 22, 15, 0.045);

  /* — Tipografia — */
  --face-display: 'Cormorant Garamond', 'Iowan Old Style', Georgia, serif;
  --face-body:    'EB Garamond', 'Iowan Old Style', Georgia, serif;

  /* — Métricas — */
  --measure: 38rem;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --spine-width: 1px;

  /* — Movimento — */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root { color-scheme: light; }
}

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

html {
  background: var(--paper);
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--face-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Textura sutil de papel — não decoração gratuita, é o material do site */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(24,22,15,0.025) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(24,22,15,0.02) 0%, transparent 50%);
}

h1, h2, h3, h4 {
  font-family: var(--face-display);
  font-weight: 500;
  margin: 0;
  color: var(--ink);
  letter-spacing: 0.005em;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  color: inherit;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

/* — Utilitário: pequenas maiúsculas espaçadas, tom de colofão — */
.label-caps {
  font-family: var(--face-body);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink-faint);
}

.italic { font-style: italic; }

/* — Foco visível para acessibilidade de teclado — */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 1.5px solid var(--ink);
  outline-offset: 3px;
}

/* — Movimento reduzido — */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* — Scrollbar discreta (webkit) — */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb {
  background: var(--rule-strong);
  border-radius: 0;
  border: 2.5px solid var(--paper);
}

/* — Toast de confirmação (usado em todas as páginas) — */
.toast {
  position: fixed;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--paper);
  padding: 0.85rem 1.5rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--face-body);
  max-width: calc(100vw - 2.5rem);
}
.toast.is-visible {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.toast svg { width: 14px; height: 14px; flex-shrink: 0; }