/* ==========================================================================
   ARKON — Engenharia & Construção, Lda.
   Sistema visual · v1.0
   ========================================================================== */

/* --- 1. Tokens ----------------------------------------------------------- */
:root {
  /* Cor — a marca é preto e branco.
     Todo o sistema vive em escala de cinzentos; existe um único acento,
     um champanhe escovado tirado da sinalética da sede, reservado a
     detalhes finos (índices, sublinhados, foco). Nunca a áreas grandes. */
  --ink:        #111010;
  --ink-2:      #191817;
  --ink-3:      #262322;
  --bone:       #F2F0EC;
  --paper:      #FAF9F7;
  --metal:      #8C8073;   /* acento — champanhe escovado */
  --metal-lit:  #B8AC9B;   /* o mesmo acento sobre fundos escuros */
  --sand:       #C9C2B7;
  --slate:      #3A3A3C;
  --moss:       #4A4A46;

  --line:       color-mix(in srgb, var(--ink) 14%, transparent);
  --line-soft:  color-mix(in srgb, var(--ink) 8%, transparent);
  --line-dark:  rgba(243, 239, 233, 0.16);

  /* Tipografia */
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body:    "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --t-hero:  clamp(2.9rem, 7.6vw, 7.4rem);
  --t-h1:    clamp(2.3rem, 5.4vw, 4.6rem);
  --t-h2:    clamp(1.8rem, 3.4vw, 3.05rem);
  --t-h3:    clamp(1.25rem, 1.9vw, 1.6rem);
  --t-lead:  clamp(1.05rem, 1.35vw, 1.28rem);
  --t-body:  1rem;
  --t-small: 0.875rem;
  --t-label: 0.72rem;

  /* Espaço */
  --gut:      clamp(1.25rem, 4.4vw, 4.5rem);
  --section:  clamp(4.5rem, 10vw, 9.5rem);
  --maxw:     1560px;

  /* Movimento */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.7s;
}

/* --- 2. Reset ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.62;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--ink); color: var(--bone); }

:focus-visible {
  outline: 2px solid var(--metal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --- 3. Tipografia ------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.032em;
  text-wrap: balance;
}
h3, h4 { line-height: 1.16; letter-spacing: -0.02em; }

.display  { font-size: var(--t-hero); }
.h1       { font-size: var(--t-h1); }
.h2       { font-size: var(--t-h2); }
.h3       { font-size: var(--t-h3); }

.lead {
  font-size: var(--t-lead);
  line-height: 1.5;
  letter-spacing: -0.012em;
  text-wrap: pretty;
}

.label {
  font-family: var(--font-mono);
  font-size: var(--t-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  color: color-mix(in srgb, var(--ink) 55%, transparent);
}
.label--accent { color: var(--metal); }
.label--light { color: color-mix(in srgb, var(--bone) 60%, transparent); }

.muted { color: color-mix(in srgb, var(--ink) 62%, transparent); }
.muted-light { color: color-mix(in srgb, var(--bone) 66%, transparent); }
.measure { max-width: 62ch; }
.measure-sm { max-width: 48ch; }

/* --- 4. Layout ----------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}
.section { padding-block: var(--section); }
.section--tight { padding-block: clamp(3rem, 6vw, 5.5rem); }

.grid { display: grid; gap: clamp(1.5rem, 3vw, 3rem); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

.span-3 { grid-column-end: span 3; }
.span-4 { grid-column-end: span 4; }
.span-5 { grid-column-end: span 5; }
.span-6 { grid-column-end: span 6; }
.span-7 { grid-column-end: span 7; }
.span-8 { grid-column-end: span 8; }
.start-2 { grid-column-start: 2; }
.start-6 { grid-column-start: 6; }
.start-7 { grid-column-start: 7; }
.start-8 { grid-column-start: 8; }
.start-9 { grid-column-start: 9; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-12 { grid-template-columns: 1fr; }
  [class*="span-"], [class*="start-"] { grid-column: 1 / -1; }
}

/* Cabeçalho de secção com índice */
.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(1rem, 3vw, 3rem);
  align-items: end;
  padding-bottom: clamp(1.75rem, 3vw, 3rem);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(2rem, 4vw, 4rem);
}
@media (max-width: 820px) {
  .sec-head { grid-template-columns: 1fr; align-items: start; }
}
.sec-head__idx { display: flex; align-items: baseline; gap: .9rem; margin-bottom: 1.1rem; }
.sec-head__idx::after { content: ""; flex: 1; height: 1px; background: var(--line); max-width: 90px; }

/* Modo escuro local (secções invertidas) */
.dark {
  background: var(--ink);
  color: var(--bone);
}
.dark .label { color: color-mix(in srgb, var(--bone) 55%, transparent); }
.dark .label--accent { color: var(--metal-lit); }
.dark .muted, .ftr .muted { color: color-mix(in srgb, var(--bone) 64%, transparent); }
.ftr .label { color: color-mix(in srgb, var(--bone) 55%, transparent); }
.dark .sec-head,
.dark .rule { border-color: var(--line-dark); }
.dark .sec-head__idx::after { background: var(--line-dark); }

.rule { border: 0; border-top: 1px solid var(--line); }

/* --- 5. Botões ----------------------------------------------------------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--bone);
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  padding: 1.05rem 1.7rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-mono);
  font-size: var(--t-label);
  letter-spacing: .14em;
  text-transform: uppercase;
  border: 1px solid var(--btn-bg);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: color .45s var(--ease), border-color .45s var(--ease);
}
.btn::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--metal);
  transform: translateY(101%);
  transition: transform .5s var(--ease);
  z-index: -1;
}
.btn:hover::before { transform: translateY(0); }
.btn:hover { color: var(--bone); border-color: var(--metal); }
.btn__arrow { transition: transform .45s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* CTA principal: preto sólido. O único momento de acento é o
   preenchimento que sobe no hover — área pequena, intenção alta. */
.btn--solid { --btn-bg: var(--ink); --btn-fg: var(--bone); }
.btn--solid::before { background: var(--metal); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); border-color: var(--line); }
.btn--ghost:hover { color: var(--bone); border-color: var(--metal); }
.dark .btn--ghost { --btn-fg: var(--bone); border-color: var(--line-dark); }
.btn--light { --btn-bg: var(--bone); --btn-fg: var(--ink); }
.btn--light::before { background: var(--metal); }

/* Link sublinhado animado */
.ulink {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-mono); font-size: var(--t-label);
  letter-spacing: .14em; text-transform: uppercase;
  padding-bottom: .35rem;
  background-image: linear-gradient(var(--metal), var(--metal));
  background-size: 0% 1px; background-position: 0 100%; background-repeat: no-repeat;
  transition: background-size .45s var(--ease), color .3s;
}
.ulink:hover { background-size: 100% 1px; color: var(--metal); }

/* --- 6. Cabeçalho / Navegação ------------------------------------------- */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  padding-block: clamp(.9rem, 1.6vw, 1.35rem);
  transition: background-color .5s var(--ease), border-color .5s, padding .4s var(--ease);
  border-bottom: 1px solid transparent;
  color: var(--bone);
}
.hdr__in { display: flex; align-items: center; justify-content: space-between; gap: 2rem; }

.hdr.is-solid {
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
  color: var(--ink);
  padding-block: .7rem;
}
.hdr.is-hidden { transform: translateY(-105%); }
.hdr { transition: transform .5s var(--ease), background-color .5s var(--ease), border-color .5s, padding .4s var(--ease), color .4s; }

/* páginas internas arrancam com cabeçalho claro */
body.has-light-top .hdr { color: var(--ink); }

.brand { display: inline-flex; align-items: center; gap: .72rem; position: relative; z-index: 85; }

/* o monograma oficial é branco sobre transparente:
   inverte-se para preto quando o cabeçalho assenta em fundo claro */
.brand__mark { width: auto; height: 32px; flex: none; display: block; transition: filter .4s var(--ease); }
.hdr.is-solid .brand__mark { filter: invert(1); }
body.has-light-top .hdr .brand__mark { filter: invert(1); }
body.is-menu-open .hdr .brand__mark { filter: none; }

/* lockup completo, usado sobre fundos escuros (rodapé, 404) */
.brand--lockup { display: inline-block; }
.brand--lockup img { width: clamp(108px, 11vw, 132px); height: auto; display: block; }

.brand__txt { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.16rem; letter-spacing: .22em; text-transform: uppercase;
}
.brand__sub {
  font-family: var(--font-mono); font-size: .55rem; letter-spacing: .2em;
  text-transform: uppercase; opacity: .62; margin-top: .32rem;
}

.nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.1rem); }
.nav__link {
  font-family: var(--font-mono); font-size: var(--t-label);
  letter-spacing: .12em; text-transform: uppercase;
  position: relative; padding-block: .3rem; opacity: .82;
  transition: opacity .3s;
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: right; transition: transform .45s var(--ease);
}
.nav__link:hover { opacity: 1; }
.nav__link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__link.is-active { opacity: 1; color: var(--metal); }
.nav__link.is-active::after { transform: scaleX(1); background: var(--metal); }

.hdr__tools { display: flex; align-items: center; gap: .85rem; position: relative; z-index: 85; }

.lang {
  display: inline-flex; align-items: center;
  border: 1px solid currentColor; border-radius: 2px;
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .1em;
  overflow: hidden;
}
.lang button {
  background: none; border: 0; cursor: pointer;
  padding: .42rem .6rem; opacity: .55; transition: .3s;
}
/* pastilha do idioma activa: sólido na cor do cabeçalho, texto invertido —
   preto sobre fundo claro, branco sobre fundo escuro. Sem cor. */
.lang button.is-on { background: var(--bone); opacity: 1; }
.lang button.is-on span { color: var(--ink); }
.hdr.is-solid .lang button.is-on,
body.has-light-top .hdr .lang button.is-on { background: var(--ink); }
.hdr.is-solid .lang button.is-on span,
body.has-light-top .hdr .lang button.is-on span { color: var(--bone); }
body.is-menu-open .hdr .lang button.is-on { background: var(--bone); }
body.is-menu-open .hdr .lang button.is-on span { color: var(--ink); }

@media (max-width: 460px) { .brand__sub { display: none; } .brand__name { font-size: 1.05rem; } }

.burger {
  display: none; background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; padding: 0; place-items: center;
}
.burger span { display: block; width: 22px; height: 1.5px; background: currentColor; transition: transform .4s var(--ease), opacity .3s; }
.burger span + span { margin-top: 6px; }
.is-menu-open .burger span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.is-menu-open .burger span:nth-child(2) { opacity: 0; }
.is-menu-open .burger span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 1080px) {
  .burger { display: grid; }
  .nav {
    position: fixed; inset: 0; z-index: 80;
    flex-direction: column; align-items: flex-start; justify-content: center;
    gap: .4rem;
    padding: 6rem var(--gut) 3rem;
    background: var(--ink); color: var(--bone);
    clip-path: inset(0 0 100% 0);
    transition: clip-path .7s var(--ease);
    overflow-y: auto;
  }
  .is-menu-open .nav { clip-path: inset(0 0 0 0); }
  .nav__link {
    font-family: var(--font-display); font-size: clamp(1.9rem, 7vw, 3rem);
    letter-spacing: -.03em; text-transform: none; padding-block: .35rem;
    opacity: 0; transform: translateY(18px);
    transition: opacity .5s var(--ease), transform .5s var(--ease);
  }
  .nav__link::after { display: none; }
  .is-menu-open .nav__link { opacity: .9; transform: none; transition-delay: calc(.18s + var(--i, 0) * .05s); }
  .hdr { color: var(--bone); }
  body.has-light-top .hdr:not(.is-solid) { color: var(--ink); }
  .is-menu-open .hdr, .is-menu-open.has-light-top .hdr { color: var(--bone); background: transparent; border-color: transparent; }
}

/* --- 7. Hero ------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: min(100svh, 980px);
  display: flex; align-items: flex-end;
  background: var(--ink); color: var(--bone);
  overflow: hidden;
}
.hero__media { position: absolute; inset: 0; }
.hero__media img {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.08);
  animation: heroIn 2.4s var(--ease) forwards;
}
@keyframes heroIn { to { transform: scale(1); } }
.hero__media::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(to right, rgba(20,17,16,.86) 0%, rgba(20,17,16,.56) 38%, rgba(20,17,16,.22) 72%, rgba(20,17,16,.1) 100%),
    linear-gradient(to top, rgba(20,17,16,.96) 0%, rgba(20,17,16,.82) 26%, rgba(20,17,16,.46) 55%, rgba(20,17,16,.22) 78%, rgba(20,17,16,.58) 100%);
}
.hero__in { position: relative; z-index: 2; width: 100%; padding-bottom: clamp(2.5rem, 5vw, 4.5rem); padding-top: 9rem; }
.hero__title { font-size: var(--t-hero); max-width: 15ch; }
.hero__title em { font-style: normal; color: var(--metal-lit); }
.hero__meta {
  display: flex; flex-wrap: wrap; gap: clamp(1rem, 4vw, 4rem);
  align-items: flex-end; justify-content: space-between;
  margin-top: clamp(2rem, 4vw, 3.4rem);
  padding-top: 1.6rem; border-top: 1px solid var(--line-dark);
}
.hero__scroll {
  display: inline-flex; align-items: center; gap: .7rem;
  font-family: var(--font-mono); font-size: var(--t-label);
  letter-spacing: .14em; text-transform: uppercase; opacity: .7;
}
.hero__scroll i {
  display: block; width: 1px; height: 34px; background: currentColor;
  transform-origin: top; animation: scrollPulse 2.2s var(--ease) infinite;
}
@keyframes scrollPulse { 0%,100% { transform: scaleY(.3); opacity:.3 } 50% { transform: scaleY(1); opacity:1 } }

/* Faixa de estatísticas */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
.dark .stats, .dark .stats { background: var(--line-dark); border-color: var(--line-dark); }
.stat { background: var(--paper); padding: clamp(1.6rem, 3vw, 2.6rem) clamp(1.1rem, 2vw, 2rem); }
.dark .stat { background: var(--ink); }
.stat__n { font-family: var(--font-display); font-size: clamp(2rem, 3.6vw, 3.1rem); letter-spacing: -.04em; line-height: 1; }
.stat__n sup { font-size: .42em; vertical-align: super; color: var(--metal); margin-left: .1em; }
.stat__t { margin-top: .8rem; }
@media (max-width: 860px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* --- 8. Cartões de serviço ---------------------------------------------- */
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-dark); }
@media (max-width: 1100px) { .pillars { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px)  { .pillars { grid-template-columns: 1fr; } }

.pillar {
  position: relative; background: var(--ink); color: var(--bone);
  padding: clamp(1.8rem, 2.6vw, 2.8rem);
  min-height: clamp(340px, 34vw, 460px);
  display: flex; flex-direction: column;
  isolation: isolate; overflow: hidden;
}
.pillar::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(160deg, var(--ink-3) 0%, var(--ink) 78%);
  opacity: 0; transition: opacity .6s var(--ease);
}
.pillar:hover::before { opacity: 1; }
.pillar__n { font-family: var(--font-mono); font-size: var(--t-label); letter-spacing: .16em; opacity: .5; }
.pillar__t { margin-top: auto; padding-top: 2.5rem; font-size: clamp(1.4rem, 2vw, 1.85rem); }
.pillar__d { margin-top: .9rem; font-size: var(--t-small); line-height: 1.6; opacity: .72; }
.pillar__list {
  list-style: none; padding: 0; margin: 1.4rem 0 0;
  display: grid; gap: .38rem;
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height .6s var(--ease), opacity .4s var(--ease), margin .5s var(--ease);
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase;
}
.pillar:hover .pillar__list, .pillar:focus-within .pillar__list { max-height: 260px; opacity: .9; }
.pillar__list li { padding-left: 1rem; position: relative; }
.pillar__list li::before { content: "—"; position: absolute; left: 0; opacity: .5; }

/* --- 9. Portfólio -------------------------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: clamp(2rem, 3.5vw, 3rem); }
.filter {
  background: none; border: 1px solid var(--line); border-radius: 100px;
  padding: .55rem 1.1rem; cursor: pointer;
  font-family: var(--font-mono); font-size: var(--t-label);
  letter-spacing: .1em; text-transform: uppercase;
  transition: .35s var(--ease);
}
.filter:hover { border-color: var(--ink); }
.filter.is-on { background: var(--ink); border-color: var(--ink); color: var(--bone); }

.works { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(1.1rem, 2.2vw, 2.2rem); }
.work { grid-column: span 6; position: relative; }
.work--wide { grid-column: span 12; }
.work--third { grid-column: span 4; }
@media (max-width: 900px) { .work, .work--wide, .work--third { grid-column: span 12; } }
.work.is-out { display: none; }

.work__link { display: block; cursor: pointer; }
.work__frame {
  position: relative; overflow: hidden; background: var(--ink);
  aspect-ratio: 4 / 3;
}
.work--wide .work__frame { aspect-ratio: 21 / 9; }
@media (max-width: 700px) { .work--wide .work__frame { aspect-ratio: 4/3; } }
.work__frame img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1s var(--ease), filter .7s var(--ease);
}
.work__link:hover .work__frame img { transform: scale(1.045); }
/* desenhos técnicos: mostrar a folha inteira, não recortada */
.work__frame img.is-plan, .lb__media img.is-plan {
  object-fit: contain; background: #EDE8E0;
}
.work__frame::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(20,17,16,.6), transparent 52%);
  opacity: 0; transition: opacity .55s var(--ease);
}
.work__link:hover .work__frame::after { opacity: 1; }
.work__badge {
  position: absolute; top: 1rem; left: 1rem; z-index: 2;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(8px);
  padding: .38rem .7rem; border-radius: 2px;
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .12em; text-transform: uppercase;
}
.work__badge--live { background: var(--ink); color: var(--bone); }
.work__foot {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 1.5rem;
  padding-top: 1.05rem; margin-top: 1.05rem; border-top: 1px solid var(--line);
}
.work__t { font-size: clamp(1.15rem, 1.55vw, 1.45rem); }
.work__m { margin-top: .35rem; }
.work__go { flex: none; font-family: var(--font-mono); font-size: var(--t-label); opacity: .45; transition: .4s var(--ease); }
.work__link:hover .work__go { opacity: 1; color: var(--metal); transform: translate(3px, -3px); }

/* Placeholder de render (quando ainda não há imagem final) */
.plate {
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,.03) 0 2px, transparent 2px 9px),
    linear-gradient(150deg, var(--pl-a, #2A2320) 0%, var(--pl-b, #4A342B) 100%);
  display: grid; place-content: center; gap: .6rem; text-align: center;
  color: color-mix(in srgb, var(--bone) 55%, transparent);
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .18em; text-transform: uppercase;
}
.plate svg { margin-inline: auto; opacity: .35; }

/* --- 10. Lightbox / ficha de projecto ----------------------------------- */
.lb {
  position: fixed; inset: 0; z-index: 120;
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  backdrop-filter: blur(6px);
  display: grid; place-items: center;
  padding: clamp(1rem, 4vw, 3rem);
  opacity: 0; pointer-events: none;
  transition: opacity .45s var(--ease);
}
.lb.is-on { opacity: 1; pointer-events: auto; }
.lb__box {
  width: min(1180px, 100%); max-height: 90svh; overflow-y: auto;
  position: relative;
  background: var(--paper); border-radius: 3px;
  display: grid; grid-template-columns: 1.15fr .85fr;
  transform: translateY(22px) scale(.985);
  transition: transform .55s var(--ease);
}
.lb.is-on .lb__box { transform: none; }
@media (max-width: 880px) { .lb__box { grid-template-columns: 1fr; } }
.lb__media { position: relative; background: var(--ink); min-height: 260px; }
.lb__media img { width: 100%; height: 100%; object-fit: cover; }
.lb__body { padding: clamp(1.6rem, 3vw, 2.8rem); }
.lb__close {
  position: absolute; top: 1rem; right: 1rem; z-index: 3;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--paper);
  cursor: pointer; display: grid; place-items: center;
  transition: .35s var(--ease);
}
.lb__close:hover { background: var(--metal); color: var(--bone); border-color: var(--metal); transform: rotate(90deg); }
.spec { list-style: none; padding: 0; margin: 1.8rem 0 0; display: grid; gap: 0; }
.spec li { display: flex; justify-content: space-between; gap: 1.5rem; padding: .8rem 0; border-top: 1px solid var(--line-soft); font-size: var(--t-small); }
.spec dt, .spec .k { font-family: var(--font-mono); font-size: var(--t-label); letter-spacing: .12em; text-transform: uppercase; opacity: .55; }
.spec .v { text-align: right; }

/* --- 11. Listas numeradas / acordeão ------------------------------------ */
.idxlist { border-top: 1px solid var(--line); }
.dark .idxlist { border-color: var(--line-dark); }
.idxrow {
  display: grid; grid-template-columns: 4.5rem minmax(0,1fr) minmax(0,1.15fr) 2.5rem;
  gap: clamp(.8rem, 2vw, 2rem); align-items: baseline;
  padding: clamp(1.5rem, 2.4vw, 2.3rem) 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .55s var(--ease), color .4s;
  position: relative;
}
.dark .idxrow { border-color: var(--line-dark); }
.idxrow::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--metal); transform: scaleY(0); transform-origin: bottom;
  transition: transform .5s var(--ease);
}
a.idxrow:hover, .idxrow:hover { padding-left: 1.2rem; }
.idxrow:hover::before { transform: scaleY(1); transform-origin: top; }
@media (max-width: 820px) {
  .idxrow { grid-template-columns: 3rem 1fr; }
  .idxrow > *:nth-child(3) { grid-column: 2; }
  .idxrow > *:nth-child(4) { display: none; }
}

/* --- 12. Sustentabilidade ------------------------------------------------ */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: stretch; min-height: clamp(420px, 46vw, 660px);
}
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.split__media { position: relative; overflow: hidden; background: var(--ink); min-height: 320px; }
.split__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.split__body { display: flex; flex-direction: column; justify-content: center; padding: clamp(2rem, 5vw, 5rem); }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.8rem; }
.chip {
  border: 1px solid var(--line-dark); border-radius: 100px;
  padding: .5rem 1rem; font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
}
.light .chip, .chip--light { border-color: var(--line); }

/* --- 13. Equipa ---------------------------------------------------------- */
.person__ph {
  aspect-ratio: 3/4; background: linear-gradient(160deg, var(--ink-2), var(--slate));
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.person__ph span {
  font-family: var(--font-display); font-size: clamp(2.4rem, 4vw, 3.6rem);
  color: color-mix(in srgb, var(--bone) 22%, transparent); letter-spacing: .04em;
}
.person__ph::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 3px; background: var(--metal);
  transform: scaleX(0); transform-origin: left; transition: transform .6s var(--ease);
}
.person:hover .person__ph::after { transform: scaleX(1); }
.person__n { margin-top: 1.1rem; font-size: 1.12rem; }
.person__r { margin-top: .3rem; }

/* --- 14. Jornal / cartões ------------------------------------------------ */
.post { display: grid; gap: 1.1rem; }
.post__frame { aspect-ratio: 16/10; overflow: hidden; background: var(--ink); position: relative; }
.post__frame img { width: 100%; height: 100%; object-fit: cover; transition: transform .9s var(--ease); }
.post:hover .post__frame img { transform: scale(1.05); }
.post__t { font-size: 1.2rem; }
.post__t a { background-image: linear-gradient(var(--metal), var(--metal)); background-size: 0% 1px; background-position: 0 100%; background-repeat: no-repeat; transition: background-size .5s var(--ease); }
.post:hover .post__t a { background-size: 100% 1px; }

/* --- 15. Formulário ------------------------------------------------------ */
.form { display: grid; gap: 1.4rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 700px) { .form__row { grid-template-columns: 1fr; } }
.field { position: relative; display: grid; }
.field label {
  font-family: var(--font-mono); font-size: var(--t-label);
  letter-spacing: .14em; text-transform: uppercase; opacity: .6; margin-bottom: .55rem;
}
.field input, .field textarea, .field select {
  background: transparent; border: 0; border-bottom: 1px solid var(--line);
  padding: .75rem 0; font-size: 1rem; border-radius: 0;
  transition: border-color .4s var(--ease);
  appearance: none;
}
.dark .field input, .dark .field textarea, .dark .field select { border-color: var(--line-dark); }
.dark .field option { color: var(--ink); }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--metal); }
.field textarea { resize: vertical; min-height: 130px; }
.form__note { font-size: var(--t-small); }
.form__ok {
  display: none; align-items: center; gap: .7rem;
  padding: 1rem 1.2rem; border: 1px solid var(--metal);
  background: color-mix(in srgb, var(--metal) 10%, transparent);
  font-size: var(--t-small);
}
.form__ok.is-on { display: flex; }

/* --- 16. Rodapé ---------------------------------------------------------- */
.ftr { background: var(--ink); color: var(--bone); padding-top: clamp(3.5rem, 7vw, 6.5rem); }
.ftr__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: clamp(1.8rem, 3vw, 3rem); padding-bottom: clamp(2.5rem, 5vw, 4.5rem); }
@media (max-width: 980px) { .ftr__top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .ftr__top { grid-template-columns: 1fr; } }
.ftr__col h4 { font-family: var(--font-mono); font-size: var(--t-label); letter-spacing: .16em; text-transform: uppercase; opacity: .5; font-weight: 500; margin-bottom: 1.2rem; }
.ftr__col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .6rem; font-size: var(--t-small); }
.ftr__col a { opacity: .78; transition: .3s; }
.ftr__col a:hover { opacity: 1; color: var(--metal-lit); }
.ftr__cta { font-size: clamp(1.6rem, 3.4vw, 2.9rem); letter-spacing: -.03em; }
.ftr__bar {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  padding-block: 1.6rem; border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; opacity: .55;
}

/* Faixa gigante ARKON */
.bigmark {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(4rem, 19vw, 19rem); line-height: .8; letter-spacing: -.045em;
  text-align: center; color: transparent;
  -webkit-text-stroke: 1px var(--line-dark);
  padding-block: clamp(1rem, 2vw, 2rem);
  user-select: none;
}

/* --- 17. WhatsApp flutuante --------------------------------------------- */
/* Assistente de contacto — cumprimenta e qualifica o pedido antes
   de encaminhar para WhatsApp ou e-mail. Sem back-end. */
.chat { position: fixed; right: clamp(1rem, 2.4vw, 2rem); bottom: clamp(1rem, 2.4vw, 2rem); z-index: 96; }

.chat__fab {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--ink); color: var(--bone);
  border: 0; cursor: pointer; display: grid; place-items: center;
  box-shadow: 0 12px 30px rgba(17,16,16,.30);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  position: relative; margin-left: auto;
}
.chat__fab:hover { transform: translateY(-3px); box-shadow: 0 18px 38px rgba(17,16,16,.38); }
.chat__fab svg { width: 24px; height: 24px; }
.chat__fab .ic-x { display: none; }
.chat.is-on .chat__fab .ic-x { display: block; }
.chat.is-on .chat__fab .ic-b { display: none; }
.chat__dot {
  position: absolute; top: 2px; right: 2px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--metal-lit); border: 2px solid var(--ink);
}
.chat.is-on .chat__dot, .chat.is-seen .chat__dot { display: none; }

.chat__panel {
  position: absolute; right: 0; bottom: 70px;
  width: min(360px, calc(100vw - 2rem));
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--line); border-radius: 4px;
  box-shadow: 0 30px 70px rgba(17,16,16,.24);
  overflow: hidden;
  transform-origin: bottom right;
  opacity: 0; transform: translateY(12px) scale(.97); pointer-events: none;
  transition: opacity .38s var(--ease), transform .38s var(--ease);
}
.chat.is-on .chat__panel { opacity: 1; transform: none; pointer-events: auto; }

.chat__hd {
  display: flex; align-items: center; gap: .75rem;
  padding: .95rem 1rem; background: var(--ink); color: var(--bone);
}
.chat__hd img { height: 26px; width: auto; }
.chat__t { font-family: var(--font-display); font-size: .98rem; letter-spacing: .16em; text-transform: uppercase; }
.chat__s { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .08em; opacity: .62; margin-top: .18rem; }
.chat__x {
  margin-left: auto; background: none; border: 0; color: inherit;
  font-size: 1.3rem; line-height: 1; cursor: pointer; opacity: .6; padding: .2rem .1rem;
}
.chat__x:hover { opacity: 1; }

.chat__body { padding: 1.1rem 1rem .4rem; max-height: 46vh; overflow-y: auto; }
.chat__msg {
  font-size: var(--t-small); line-height: 1.55;
  background: color-mix(in srgb, var(--ink) 6%, transparent);
  padding: .7rem .85rem; border-radius: 2px 10px 10px 10px;
  margin-bottom: .5rem; max-width: 92%;
  animation: chatIn .45s var(--ease) both;
}
.chat__msg--me {
  margin-left: auto; background: var(--ink); color: var(--bone);
  border-radius: 10px 2px 10px 10px;
}
@keyframes chatIn { from { opacity: 0; transform: translateY(8px); } }

.chat__quick { display: flex; flex-wrap: wrap; gap: .4rem; padding: .5rem 1rem 1.1rem; }
.chat__quick button {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .08em;
  padding: .5rem .75rem; border: 1px solid var(--line);
  background: none; border-radius: 2px; cursor: pointer;
  transition: background-color .3s, color .3s, border-color .3s;
}
.chat__quick button:hover { background: var(--ink); color: var(--bone); border-color: var(--ink); }

.chat__form { padding: 0 1rem 1.1rem; display: grid; gap: .5rem; }
.chat__form[hidden] { display: none; }   /* [hidden] tem de vencer o display:grid */
.chat__form input {
  padding: .7rem .8rem; border: 1px solid var(--line);
  background: var(--paper); border-radius: 2px; font-size: var(--t-small);
}
.chat__form input:focus { outline: none; border-color: var(--ink); }
.chat__send {
  padding: .8rem 1rem; background: var(--ink); color: var(--bone);
  border: 0; border-radius: 2px; cursor: pointer;
  font-family: var(--font-mono); font-size: var(--t-label); letter-spacing: .12em; text-transform: uppercase;
  transition: background-color .35s var(--ease);
}
.chat__send:hover { background: var(--metal); }
.chat__alt {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .06em;
  text-align: center; opacity: .6; padding-bottom: .2rem;
}
.chat__alt a { text-decoration: underline; text-underline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  .chat__panel, .chat__msg { transition: none; animation: none; }
}

/* --- 18. Barra de progresso --------------------------------------------- */
.prog { position: fixed; top: 0; left: 0; height: 2px; background: var(--metal); width: 0; z-index: 100; transition: width .1s linear; }

/* --- 19. Revelação ao scroll -------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .09s; }
[data-reveal][data-delay="2"] { transition-delay: .18s; }
[data-reveal][data-delay="3"] { transition-delay: .27s; }
[data-reveal][data-delay="4"] { transition-delay: .36s; }
[data-reveal][data-delay="5"] { transition-delay: .45s; }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; } }

/* Máscara de revelação de imagem */
.mask { overflow: hidden; }
.mask img { transform: scale(1.12); transition: transform 1.5s var(--ease); }
.mask.is-in img { transform: scale(1); }

/* --- 20. Cabeçalho de página interna ------------------------------------ */
.phero {
  padding-top: clamp(8rem, 14vw, 12rem);
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}
.phero__t { font-size: var(--t-h1); max-width: 18ch; }
.crumb { display: flex; gap: .6rem; align-items: center; margin-bottom: 1.6rem; }

/* Utilitários */
.mt-1 { margin-top: .6rem } .mt-2 { margin-top: 1.2rem } .mt-3 { margin-top: 1.8rem }
.mt-4 { margin-top: 2.6rem } .mt-5 { margin-top: 3.6rem }
.flex { display: flex } .wrapf { flex-wrap: wrap } .gap-1 { gap: .8rem } .gap-2 { gap: 1.4rem }
.items-end { align-items: flex-end } .between { justify-content: space-between }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }