/* =========================================================================
   MANUEL MARTINS — Serviços de Engenharia
   Sistema de design — reconstruído com CSS moderno (Grid + Flexbox)
   Direção: linguagem de desenho técnico / instrumentação de medição —
   grelha de "papel milimétrico", marcas de calibração (traços em cruz)
   como elemento de assinatura, e um amarelo-sinalização usado com
   moderação para remeter para a segurança no trabalho (o próprio core
   business da empresa), não como decoração genérica.
   ========================================================================= */

:root {
  /* Cor — derivada do azul real do logótipo (#4d7e9f) */
  --ink: #16324a;          /* azul profundo institucional — texto, nav */
  --brand: #2e5c7a;        /* azul primário — links, ações */
  --brand-light: #4d7e9f;  /* azul do logótipo — detalhes, hover */
  --blueprint: #eef3f7;    /* fundo "papel de desenho técnico" */
  --blueprint-line: #d8e3ec;
  --steel: #5c7089;        /* texto secundário */
  --charcoal: #1b2430;     /* texto principal */
  --signal: #f2b705;       /* amarelo-sinalização — acentos raros */
  --signal-ink: #4a3800;
  --white: #ffffff;
  --danger: #b3261e;
  --success: #1e6b3c;

  --font-display: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  --font-body: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --container: 1180px;
  --radius: 3px;
  --shadow: 0 1px 2px rgba(22,50,74,0.06), 0 6px 20px rgba(22,50,74,0.06);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--ink); }
ul { margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.2; margin: 0 0 .5em; }
p { margin: 0 0 1em; }

/* Foco visível — acessibilidade */
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- Marca de calibração (elemento de assinatura) ----------
   Um pequeno "tick" em cruz — como as marcas de referência usadas em
   desenho técnico e instrumentos de medição — usado para separar
   secções e assinalar o item ativo do menu. */
.tick { position: relative; }
.tick::before {
  content: '';
  position: absolute;
  width: 10px; height: 10px;
  border-left: 1.5px solid var(--signal);
  border-top: 1.5px solid var(--signal);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brand-light);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: .6em;
}
.eyebrow::before {
  content: '';
  width: 18px; height: 1px;
  background: var(--signal);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--white);
  padding: 10px 16px;
  z-index: 200;
  font-family: var(--font-mono);
  font-size: 13px;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* ---------- Cabeçalho / navegação ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--blueprint-line);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img { height: 46px; width: auto; }

.nav-toggle {
  display: none;
}
.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 8px;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle-label span::before { content: ''; position: absolute; top: -7px; }
.nav-toggle-label span::after { content: ''; position: absolute; top: 7px; }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
  flex-wrap: wrap;
}
.main-nav a {
  display: inline-block;
  padding: 10px 14px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.main-nav a:hover { color: var(--brand); border-color: var(--blueprint-line); }
.main-nav a.active {
  color: var(--brand);
  border-color: var(--signal);
  font-weight: 600;
}

@media (max-width: 880px) {
  .nav-toggle-label { display: inline-flex; align-items: center; justify-content: center; }
  .main-nav {
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
  }
  .main-nav ul { flex-direction: column; gap: 0; padding: 8px 0; }
  .main-nav a { padding: 12px 4px; border-bottom: 1px solid var(--blueprint-line); border-left: 2px solid transparent; }
  .main-nav a.active { border-left-color: var(--signal); border-bottom-color: var(--blueprint-line); }
  .nav-toggle:checked ~ .main-nav { max-height: 500px; }
  .header-inner { flex-wrap: wrap; }
}

/* ---------- Layout utilitário ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 56px 0; }
.section--tight { padding: 32px 0; }
.section--blueprint {
  background-color: var(--blueprint);
  background-image:
    linear-gradient(var(--blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
  background-size: 28px 28px;
  border-top: 1px solid var(--blueprint-line);
  border-bottom: 1px solid var(--blueprint-line);
}

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--blueprint-line);
}
.hero h1 {
  font-size: clamp(32px, 4vw, 46px);
  max-width: 18ch;
}
.hero .lede {
  color: var(--steel);
  font-size: 17px;
  max-width: 60ch;
}
.page-hero {
  padding: 40px 0;
  border-bottom: 1px solid var(--blueprint-line);
  background-color: var(--blueprint);
  background-image:
    linear-gradient(var(--blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
  background-size: 28px 28px;
}
.page-hero h1 { font-size: clamp(28px, 3.4vw, 38px); }

/* ---------- Grelhas ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- Cartões ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card h3 { font-size: 18px; }

.news-card {
  display: flex;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  padding: 18px;
}
.news-date {
  flex: 0 0 auto;
  width: 64px;
  text-align: center;
  font-family: var(--font-mono);
  background: var(--ink);
  color: var(--white);
  border-radius: var(--radius);
  padding: 10px 4px;
  align-self: flex-start;
}
.news-date .day { display: block; font-size: 20px; font-weight: 600; line-height: 1; }
.news-date .month { display: block; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; margin-top: 4px; }
.news-card h3 { font-size: 16px; margin-bottom: 6px; }
.news-card p { color: var(--steel); font-size: 14px; margin-bottom: 8px; }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 11px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--brand);
  background: var(--brand);
  color: var(--white);
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { background: var(--ink); border-color: var(--ink); color: var(--white); }
.btn--ghost { background: transparent; color: var(--brand); }
.btn--ghost:hover { background: var(--brand); color: var(--white); }
.btn--sm { padding: 7px 12px; font-size: 13px; }
.btn--signal { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.btn--signal:hover { background: #d9a400; border-color: #d9a400; color: var(--signal-ink); }

/* ---------- Faixa de valências ---------- */
.value-strip {
  background: var(--ink);
  color: var(--white);
  padding: 14px 0;
}
.value-strip .container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}
.value-strip strong { color: var(--signal); font-family: var(--font-display); margin-right: 4px; }
.value-strip span.sep { opacity: .4; }

/* ---------- Acordeão (serviços) ---------- */
.accordion { border-top: 1px solid var(--blueprint-line); }
.accordion-item { border-bottom: 1px solid var(--blueprint-line); }
.accordion-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
}
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary .plus {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--brand-light);
  flex: 0 0 auto;
  transition: transform .2s ease;
}
.accordion-item[open] summary .plus { transform: rotate(45deg); }
.accordion-body { padding: 0 4px 20px; }
.accordion-body ul { list-style: none; }
.accordion-body li {
  padding: 8px 0 8px 20px;
  position: relative;
  border-bottom: 1px dashed var(--blueprint-line);
  font-size: 15px;
  color: var(--charcoal);
}
.accordion-body li:last-child { border-bottom: none; }
.accordion-body li::before {
  content: '';
  position: absolute;
  left: 0; top: 16px;
  width: 8px; height: 8px;
  border-left: 1.5px solid var(--signal);
  border-bottom: 1.5px solid var(--signal);
}

/* ---------- Listas com marca de calibração ---------- */
.tick-list { list-style: none; }
.tick-list li {
  position: relative;
  padding: 6px 0 6px 22px;
}
.tick-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 9px; height: 9px;
  border-left: 1.5px solid var(--brand-light);
  border-top: 1.5px solid var(--brand-light);
}

/* ---------- Parcerias ---------- */
.partner-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  padding: 20px;
}
.partner-card img {
  width: 84px;
  height: 84px;
  object-fit: contain;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  padding: 6px;
  flex: 0 0 auto;
  background: var(--white);
}
.partner-card .logo-fallback {
  width: 84px;
  height: 84px;
  flex: 0 0 auto;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel);
  text-align: center;
  padding: 6px;
}
.partner-card h3 { font-size: 16px; margin-bottom: 4px; }
.partner-card p { font-size: 14px; color: var(--steel); margin: 0; }

/* ---------- Formulário de contacto ---------- */
.form-grid { display: grid; gap: 16px; }
.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 6px;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 15px;
  padding: 11px 12px;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--charcoal);
  transition: border-color .15s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--brand-light);
}
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--steel); }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form-row-2 { grid-template-columns: 1fr; } }

.alert {
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid transparent;
}
.alert--success { background: #eaf6ee; color: var(--success); border-color: #bfe4ca; }
.alert--error { background: #fbeceb; color: var(--danger); border-color: #f3c6c3; }

/* ---------- Contactos / mapa ---------- */
.contact-detail { display: flex; gap: 12px; margin-bottom: 18px; }
.contact-detail .label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--brand-light); width: 90px; flex: 0 0 auto; padding-top: 2px;}
.map-frame { border: 1px solid var(--blueprint-line); border-radius: var(--radius); overflow: hidden; }
.map-frame iframe { width: 100%; height: 260px; border: 0; display: block; }

/* ---------- Rodapé ---------- */
.site-footer {
  background: var(--ink);
  color: #cfe0ec;
  padding: 48px 0 20px;
  margin-top: 48px;
}
.site-footer a { color: #eaf2f8; }
.site-footer a:hover { color: var(--signal); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: var(--white); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 14px; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 8px; font-size: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  font-size: 12.5px;
  color: #93aabd;
  font-family: var(--font-mono);
}

/* ---------- Página de notícias ---------- */
.news-full { border-bottom: 1px solid var(--blueprint-line); padding: 28px 0; }
.news-full:last-child { border-bottom: none; }
.news-full h2 { font-size: 20px; }
.news-full .meta { font-family: var(--font-mono); font-size: 12px; color: var(--brand-light); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }

/* ---------- Texto simples / conteúdo institucional ---------- */
.prose { max-width: 72ch; }
.prose p { color: var(--charcoal); }
.lead { font-size: 18px; color: var(--ink); }