/* ==========================================================================
   CalendárioEscolar.pt — Design System v4
   Imitação rigorosa de typeui.sh: Geist + Geist Mono, paleta zinc
   monocromática, CTA preto, cartões rounded-xl, hairlines, seleção âmbar
   ========================================================================== */

/* ---- Fontes (self-hosted, variáveis) ---- */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/assets/fonts/geist-latin-var.woff2') format('woff2');
}
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/assets/fonts/geist-mono-latin-var.woff2') format('woff2');
}

/* ---- Tokens (escala zinc do Tailwind, como no typeui.sh) ---- */
:root {
  color-scheme: light dark;
  --bg: #FFFFFF;
  --bg-alt: #FAFAFA;            /* zinc-50 */
  --surface: #FFFFFF;
  --ink: #09090B;               /* zinc-950 */
  --ink-strong: #000000;
  --ink-body: #3F3F46;          /* zinc-700 */
  --ink-soft: #52525B;          /* zinc-600 */
  --ink-faint: #71717A;         /* zinc-500 */
  --ink-mute: #A1A1AA;          /* zinc-400 */
  --line: #E4E4E7;              /* zinc-200 */
  --line-soft: #F4F4F5;         /* zinc-100 */
  --deco: #D4D4D8;              /* zinc-300: decoração de links */
  --btn-bg: #000000;
  --btn-ink: #FFFFFF;
  --btn-hover: #27272A;         /* zinc-800 */
  --hover-wash: #FAFAFA;
  --card-shadow: 0 8px 30px rgb(0 0 0 / 0.04);
  --card-shadow-hover: 0 8px 30px rgb(0 0 0 / 0.08);
  --sel-bg: rgb(253 230 138 / 0.5);   /* amber-200/50 */
  --sel-ink: #78350F;                  /* amber-900 */
  --ferias-bg: #DFF2E5;
  --ferias-ink: #0F6E39;
  --feriado-bg: #FBF0D8;
  --feriado-ink: #7D5605;
  --exame-bg: #FBE9E7;
  --exame-ink: #B3271E;
  --sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --w-prose: 46rem;
  --w-wide: 68rem;
  --r-md: 6px;
  --r-lg: 8px;
  --r-xl: 12px;
  --r-2xl: 16px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: rgb(9 9 11 / 0.5);      /* zinc-950/50 */
    --surface: #000000;
    --ink: #FAFAFA;                    /* zinc-50 */
    --ink-strong: #FFFFFF;
    --ink-body: #D4D4D8;               /* zinc-300 */
    --ink-soft: #A1A1AA;               /* zinc-400 */
    --ink-faint: #A1A1AA;
    --ink-mute: #71717A;
    --line: #27272A;                   /* zinc-800 */
    --line-soft: #18181B;              /* zinc-900 */
    --deco: #3F3F46;                   /* zinc-700 */
    --btn-bg: #FFFFFF;
    --btn-ink: #000000;
    --btn-hover: #E4E4E7;              /* zinc-200 */
    --hover-wash: #18181B;
    --card-shadow: none;
    --card-shadow-hover: none;
    --sel-bg: rgb(245 158 11 / 0.3);   /* amber-500/30 */
    --sel-ink: #FDE68A;                /* amber-200 */
    --ferias-bg: #12301E;
    --ferias-ink: #7FD6A0;
    --feriado-bg: #33290F;
    --feriado-ink: #E5C36A;
    --exame-bg: #361513;
    --exame-ink: #F1948B;
  }
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink-body);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--sel-bg); color: var(--sel-ink); }
img, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
:focus-visible { outline: 2px solid var(--deco); outline-offset: 2px; border-radius: var(--r-md); }

/* ---- Tipografia ---- */
h1 {
  font-weight: 700;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--ink);
  text-wrap: balance;
}
h1 em { font-style: normal; color: var(--ink-faint); }
h2 {
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ink);
  text-wrap: balance;
  margin: 3.75rem 0 1rem;
}
h3 { font-weight: 600; font-size: 1.0625rem; line-height: 1.4; color: var(--ink); margin: 2.4rem 0 0.7rem; letter-spacing: -0.015em; }
h3.serif { font-family: var(--sans); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; margin-top: 2.75rem; }
h4 { font-weight: 600; font-size: 1rem; color: var(--ink); margin: 1.75rem 0 0.5rem; }
p { margin: 0 0 1.2rem; }
a {
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--deco);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color 0.15s, color 0.15s;
}
a:hover { color: var(--ink-strong); text-decoration-color: var(--ink-strong); }
strong { font-weight: 600; color: var(--ink); }
ul, ol { padding-left: 1.4rem; margin: 0 0 1.2rem; }
li { margin-bottom: 0.35rem; }
.lede { font-size: 1.25rem; font-weight: 300; color: var(--ink-faint); line-height: 1.65; }
.muted { color: var(--ink-faint); font-size: 0.9rem; }

/* ---- Layout ---- */
.container { max-width: var(--w-prose); margin: 0 auto; padding: 0 1.25rem; }
.container-wide { max-width: var(--w-wide); margin: 0 auto; padding: 0 1.25rem; }
main { padding-bottom: 5rem; }

/* Bandas de secção (homepage): alternância branco / zinc-50 com hairlines */
.band { padding: 0.5rem 0 2rem; }
.band-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 0.75rem 0 2.5rem; }

/* ---- Header (sticky, blur, hairline) ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.site-header .inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0.6rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 3.5rem;
}
.wordmark {
  font-weight: 600;
  font-size: 0.975rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.wordmark:hover { color: var(--ink-strong); text-decoration: none; }
.wordmark .dot { color: var(--ink-faint); }
.site-nav { display: flex; align-items: center; gap: 1.35rem; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.35rem 0;
  transition: color 0.15s;
}
.site-nav a:hover { color: var(--ink); text-decoration: none; }
.site-nav a[aria-current] { color: var(--ink); }
.site-nav a.nav-cta {
  order: 10;
  margin-left: auto;
  border-radius: var(--r-lg);
  background: var(--btn-bg);
  color: var(--btn-ink);
  padding: 0.375rem 0.75rem;
  font-weight: 500;
  transition: background 0.15s;
}
.site-nav a.nav-cta:hover { background: var(--btn-hover); color: var(--btn-ink); }
@media (max-width: 760px) {
  .site-header .inner { flex-direction: column; align-items: flex-start; gap: 0.1rem; padding-bottom: 0.55rem; }
  .site-nav { width: 100%; gap: 1.1rem; }
}

/* ---- Breadcrumbs (metadados em mono, como no typeui) ---- */
.breadcrumbs { padding: 1.4rem 0 0; font-family: var(--mono); font-size: 0.75rem; color: var(--ink-faint); }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.45rem; color: var(--ink-mute); }
.breadcrumbs a { color: var(--ink-faint); font-weight: 400; text-decoration: none; }
.breadcrumbs a:hover { color: var(--ink); text-decoration: underline; text-decoration-color: var(--deco); text-underline-offset: 4px; }

/* ---- Hero ---- */
.hero { padding: 3.5rem 0 2rem; }
.hero .kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin-bottom: 1.3rem;
}
.hero h1 { margin-bottom: 1.3rem; max-width: 46rem; }
.hero .lede { max-width: 42rem; }
.hero .btn-row { margin: 1.9rem 0 0.25rem; }
.updated {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-faint);
  margin-top: 1rem;
}

/* ---- Caixa de resposta rápida ---- */
.answer-box {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 1.4rem 1.6rem;
  margin: 2rem 0;
}
.answer-box p { margin: 0; color: var(--ink-body); }
.answer-box p + p { margin-top: 0.7rem; }
.answer-box strong { color: var(--ink-strong); }

/* ---- Grelha de datas-chave ---- */
.key-dates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.8rem;
  margin: 2rem 0;
  padding: 0;
  list-style: none;
}
.key-dates li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--card-shadow);
  padding: 1.05rem 1.2rem;
  margin: 0;
}
.key-dates .label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-faint);
  margin-bottom: 0.4rem;
  line-height: 1.5;
}
.key-dates .label a { font-family: var(--sans); font-size: 0.8125rem; }
.key-dates .value {
  display: block;
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 0.15rem;
}
main.home .key-dates li:first-child { background: var(--btn-bg); border-color: var(--btn-bg); }
main.home .key-dates li:first-child .label { color: color-mix(in srgb, var(--btn-ink) 70%, transparent); }
main.home .key-dates li:first-child .value { color: var(--btn-ink); }

/* ---- Tabelas ---- */
.table-wrap {
  overflow-x: auto;
  margin: 1.6rem 0 2rem;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--surface);
  box-shadow: var(--card-shadow);
}
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
caption { text-align: left; font-weight: 600; color: var(--ink); padding: 1.05rem 1.2rem 0.3rem; font-size: 0.975rem; letter-spacing: -0.01em; }
th, td { text-align: left; padding: 0.75rem 1.2rem; border-top: 1px solid var(--line-soft); vertical-align: top; color: var(--ink-body); }
thead th {
  border-top: none;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}
tbody tr { transition: background 0.15s; }
tbody tr:hover { background: var(--hover-wash); }
td .date-strong { font-weight: 600; color: var(--ink); white-space: nowrap; }

/* ---- Etiquetas semânticas ---- */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.14rem 0.55rem;
  border-radius: var(--r-md);
  white-space: nowrap;
}
.tag-ferias { background: var(--ferias-bg); color: var(--ferias-ink); }
.tag-feriado { background: var(--feriado-bg); color: var(--feriado-ink); }
.tag-exame { background: var(--exame-bg); color: var(--exame-ink); }
.tag-aulas { background: var(--line-soft); color: var(--ink-soft); }

/* ---- Calendário visual mensal ---- */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.month {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--card-shadow);
  padding: 1.05rem 1.15rem 1.2rem;
}
.month h3 { font-weight: 600; font-size: 0.95rem; margin: 0 0 0.7rem; }
.month table { font-size: 0.82rem; table-layout: fixed; }
.month th, .month td { padding: 0.28rem 0; text-align: center; border: none; }
.month thead th { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.06em; color: var(--ink-mute); }
.month tbody tr:hover { background: none; }
.month td { border-radius: var(--r-md); font-variant-numeric: tabular-nums; }
.month .d-ferias { background: var(--ferias-bg); color: var(--ferias-ink); font-weight: 500; }
.month .d-feriado { background: var(--feriado-bg); color: var(--feriado-ink); font-weight: 500; }
.month .d-exame { background: var(--exame-bg); color: var(--exame-ink); font-weight: 500; }
.month .d-marco { background: var(--btn-bg); color: var(--btn-ink); font-weight: 600; }
.month .d-fds { color: var(--ink-mute); }
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0.6rem 0 1.4rem;
}
.legend span { display: inline-flex; align-items: center; gap: 0.45rem; }
.legend i { width: 0.85rem; height: 0.85rem; border-radius: 4px; display: inline-block; }
.legend .i-ferias { background: var(--ferias-bg); border: 1px solid var(--ferias-ink); }
.legend .i-feriado { background: var(--feriado-bg); border: 1px solid var(--feriado-ink); }
.legend .i-exame { background: var(--exame-bg); border: 1px solid var(--exame-ink); }
.legend .i-marco { background: var(--btn-bg); }

/* ---- FAQ (lista com hairlines) ---- */
.faq { margin: 1.6rem 0 2rem; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  font-weight: 500;
  font-size: 0.975rem;
  color: var(--ink);
  padding: 1rem 2.2rem 1rem 0;
  list-style: none;
  position: relative;
  letter-spacing: -0.01em;
  transition: color 0.15s;
}
.faq summary:hover { color: var(--ink-strong); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-mute);
  font-family: var(--mono);
  font-weight: 400;
  font-size: 1.1rem;
  line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq .faq-a { padding: 0 0 1.15rem; color: var(--ink-body); }
.faq .faq-a p:last-child { margin-bottom: 0; }

/* ---- Nota de fonte oficial ---- */
.source-note {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 2.75rem 0 0;
}
.source-note p { margin: 0 0 0.5rem; }
.source-note strong { color: var(--ink-soft); }

/* ---- Botões (typeui: preto, rounded-lg, transition-colors) ---- */
.btn-row { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.75rem 0; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
  height: 2.75rem;
  padding: 0 1.4rem;
  border-radius: var(--r-lg);
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { background: var(--hover-wash); color: var(--ink); text-decoration: none; }
.btn-primary {
  background: var(--btn-bg);
  color: var(--btn-ink);
  border-color: var(--btn-bg);
}
.btn-primary:hover { background: var(--btn-hover); border-color: var(--btn-hover); color: var(--btn-ink); }

/* ---- Ligações relacionadas (cartões rounded-xl com sombra 4%) ---- */
.related {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.8rem;
  margin: 1.6rem 0 2rem;
  padding: 0;
  list-style: none;
}
.related li { margin: 0; }
.related a {
  display: block;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--card-shadow);
  padding: 1.15rem 1.25rem;
  text-decoration: none;
  color: var(--ink);
  transition: box-shadow 0.15s, border-color 0.15s;
}
.related a:hover { box-shadow: var(--card-shadow-hover); border-color: var(--deco); color: var(--ink); text-decoration: none; }
.related .r-title {
  font-weight: 600;
  font-size: 0.975rem;
  line-height: 1.35;
  display: block;
  margin-bottom: 0.3rem;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.related .r-desc { font-size: 0.85rem; font-weight: 400; color: var(--ink-faint); display: block; line-height: 1.55; }

/* ---- Destaque temporal (contagem) ---- */
.countdown {
  font-size: 0.975rem;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 1.05rem 1.35rem;
  margin: 2rem 0;
  color: var(--ink-body);
}
.countdown strong { color: var(--ink-strong); font-weight: 700; }

/* ---- Índice da página ---- */
.toc {
  font-size: 0.9rem;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 1.15rem 1.4rem;
  margin: 2rem 0;
}
.toc strong { display: block; margin-bottom: 0.5rem; }
.toc ol { margin: 0; padding-left: 1.25rem; }
.toc li { margin-bottom: 0.25rem; }
.toc a { font-weight: 400; color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--ink); text-decoration: underline; text-decoration-color: var(--deco); }

/* ---- Formulários ---- */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-weight: 500; font-size: 0.9rem; color: var(--ink); margin-bottom: 0.4rem; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--ink);
  transition: border-color 0.15s;
}
.form-group input:focus, .form-group textarea:focus { outline: 2px solid var(--deco); outline-offset: 1px; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg);
  margin-top: 5rem;
  padding: 3.5rem 0 2.25rem;
  font-size: 0.875rem;
  color: var(--ink-faint);
}
.site-footer .inner { max-width: var(--w-wide); margin: 0 auto; padding: 0 1.25rem; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 2rem;
  margin-bottom: 2.75rem;
}
.footer-grid h2 {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin: 0 0 0.9rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.25rem; }
.footer-grid a { color: var(--ink-faint); font-weight: 400; text-decoration: none; display: inline-block; padding: 0.16rem 0; transition: color 0.15s; }
.footer-grid a:hover { color: var(--ink); text-decoration: none; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--ink-mute);
}
.footer-bottom .wordmark { font-size: 0.9rem; }

/* ---- Utilidades ---- */
hr { border: none; border-top: 1px solid var(--line); margin: 3rem 0; }
.center { text-align: center; }

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

/* ---- Impressão ---- */
@media print {
  .site-header, .site-footer, .breadcrumbs, .btn-row, .related, .faq summary::after, .no-print, .countdown { display: none !important; }
  body { background: #fff; font-size: 10.5pt; color: #000; }
  .hero { padding: 0 0 1rem; }
  h1 { font-size: 21pt; }
  .container, .container-wide { max-width: 100%; padding: 0; }
  .band, .band-alt { background: none; border: none; padding: 0; }
  .calendar-grid { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .month { break-inside: avoid; border-color: #ccc; box-shadow: none; }
  .table-wrap { border-color: #ccc; box-shadow: none; overflow: visible; }
  .key-dates li { border-color: #ccc; box-shadow: none; }
  .faq details { display: block; }
  .faq details > * { display: block; }
  a { color: inherit; text-decoration: none; }
  .answer-box { border-color: #ccc; background: #f5f5f5; }
}