/* ===========================================================================
   SILVART'S — Comunicação Visual
   style.css · tokens, base, layout e componentes
   Paleta retirada da identidade da marca: preto, vermelho e o arco-íris
   da paleta de tintas do logo.
   =========================================================================== */

/* ------------------------------- 1. TOKENS ------------------------------- */
:root {
  /* Cores — altere aqui para mudar o site inteiro */
  --ink-900: #0B0B0D;
  --ink-850: #0F0F12;
  --ink-800: #141418;
  --ink-700: #1C1C21;
  --ink-600: #26262C;

  --paper:   #F4F1EC;
  --paper-dim: #C9C5BE;
  --muted:   #8E8A84;

  --red:      #D8232A;
  --red-soft: #EE4249;
  --red-deep: #96131A;

  --line:       rgba(244, 241, 236, 0.12);
  --line-soft:  rgba(244, 241, 236, 0.07);
  --overlay:    rgba(6, 6, 7, 0.86);

  --arco-iris: linear-gradient(90deg,
      #D8232A 0%, #F07C21 16%, #F2C230 32%,
      #4CA64C 50%, #1D9E9E 66%, #2653B8 82%, #7B2E9E 100%);

  /* Tipografia */
  --font-display: "Playfair Display", "Times New Roman", Georgia, serif;
  --font-sans: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

  --fs-hero:  clamp(2.9rem, 9.2vw, 7.5rem);
  --fs-h2:    clamp(2rem, 5.2vw, 3.9rem);
  --fs-h3:    clamp(1.15rem, 2.2vw, 1.5rem);
  --fs-lead:  clamp(1rem, 1.55vw, 1.19rem);
  --fs-body:  1rem;
  --fs-small: 0.82rem;

  /* Espaçamento e formas */
  --gutter: clamp(1.25rem, 5vw, 3.5rem);
  --max-w: 1180px;
  --max-w-wide: 1500px;
  --section-y: clamp(4.5rem, 11vw, 9.5rem);
  --radius: 2px;

  /* Movimento */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.45s;

  --header-h: 76px;
}

/* -------------------------------- 2. RESET -------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  background-color: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img,
svg,
picture { display: block; max-width: 100%; height: auto; }

button,
input,
textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

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

/* Garante que o atributo hidden vença qualquer display definido abaixo */
[hidden] { display: none !important; }

ul,
ol { list-style: none; padding: 0; }

h1, h2, h3 { line-height: 1.06; font-weight: 800; letter-spacing: -0.02em; }

::selection { background: var(--red); color: #fff; }

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

/* --------------------------- 3. UTILITÁRIOS BASE --------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: var(--max-w-wide); }

.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;
}

.skip-link {
  position: absolute;
  top: -100px; left: 1rem;
  z-index: 200;
  background: var(--red);
  color: #fff;
  padding: 0.7rem 1.1rem;
  font-weight: 700;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

.section { padding-block: var(--section-y); position: relative; }

.section__head { max-width: 44rem; margin-bottom: clamp(2.5rem, 6vw, 4.5rem); }
.section__head--center { margin-inline: auto; text-align: center; }

.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  margin-top: 0.6rem;
}
.section__title em {
  font-style: italic;
  font-weight: 600;
  color: var(--paper-dim);
}

.section__lead {
  margin-top: 1.1rem;
  color: var(--muted);
  font-size: var(--fs-lead);
  max-width: 38rem;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--paper-dim);
}
.eyebrow--center { justify-content: center; }

.eyebrow__rule {
  width: 44px;
  height: 3px;
  flex: none;
  background: var(--arco-iris);
}

.prose p { color: var(--paper-dim); font-size: var(--fs-lead); }
.prose p + p { margin-top: 1rem; }
.prose code,
.aviso code,
.config-alert code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--ink-700);
  padding: 0.1em 0.4em;
  border-radius: var(--radius);
}

.aviso {
  border: 1px solid var(--line);
  padding: 1.25rem;
  color: var(--muted);
}

/* ------------------------------- 4. BOTÕES ------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.95rem 1.65rem;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform 0.2s var(--ease);
  will-change: transform;
}

.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover,
.btn--primary:focus-visible { background: var(--red-soft); }

.btn--ghost {
  border-color: var(--line);
  color: var(--paper);
  background: transparent;
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--paper);
  background: rgba(244, 241, 236, 0.06);
}

.btn--sm { padding: 0.7rem 1.15rem; font-size: 0.78rem; }
.btn--lg { padding: 1.15rem 2.2rem; font-size: 1rem; }

.btn__arrow { transition: transform var(--dur) var(--ease); }
.btn--ghost:hover .btn__arrow { transform: translateY(3px); }

/* ------------------------------- 5. HEADER ------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: transparent;
  transition: background-color var(--dur) var(--ease),
              backdrop-filter var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.header.is-stuck {
  background: rgba(11, 11, 13, 0.82);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  box-shadow: 0 1px 0 var(--line-soft);
}

.header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header__rule {
  display: block;
  height: 2px;
  background: var(--arco-iris);
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  opacity: 0.9;
}

.brand { display: flex; align-items: center; gap: 0.7rem; flex: none; }

.brand__mark {
  width: auto;
  height: 34px;
  transition: transform var(--dur) var(--ease);
}
.brand:hover .brand__mark { transform: rotate(-4deg) scale(1.05); }

.brand__text { display: flex; flex-direction: column; line-height: 1.05; }

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.16rem;
  letter-spacing: 0.01em;
}

.brand__tag {
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.nav { display: flex; align-items: center; gap: 2rem; }

.nav__list { display: flex; align-items: center; gap: 1.75rem; }

.nav__link {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--paper-dim);
  position: relative;
  padding-block: 0.35rem;
  transition: color var(--dur) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform var(--dur) var(--ease);
}

.nav__link:hover,
.nav__link:focus-visible,
.nav__link.is-active { color: var(--paper); }

.nav__link:hover::after,
.nav__link:focus-visible::after,
.nav__link.is-active::after { transform: scaleX(1); transform-origin: 0 50%; }

/* Botão hambúrguer — só aparece no mobile (ver responsive.css) */
.burger {
  display: none;
  width: 44px; height: 44px;
  position: relative;
  flex: none;
  margin-right: -10px;
}

.burger__bar {
  position: absolute;
  left: 11px;
  width: 22px; height: 2px;
  background: var(--paper);
  transition: transform var(--dur) var(--ease), opacity 0.2s var(--ease);
}
.burger__bar:nth-child(1) { top: 18px; }
.burger__bar:nth-child(2) { top: 25px; }

.burger[aria-expanded="true"] .burger__bar:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__bar:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* -------------------------------- 6. HERO -------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 4.5rem;
  overflow: hidden;
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

/* textura sutil de concreto/ruído, feita em CSS puro (sem imagem extra) */
.hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(120% 90% at 78% 8%, rgba(216, 35, 42, 0.20), transparent 58%),
    radial-gradient(80% 70% at 8% 100%, rgba(38, 83, 184, 0.10), transparent 60%);
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.hero__symbol {
  position: absolute;
  right: -6%;
  top: 50%;
  translate: 0 -50%;
  width: min(56vw, 620px);
  height: auto;
  opacity: 0.09;
  filter: grayscale(1);
}

.hero__block {
  position: absolute;
  left: 0;
  bottom: 18%;
  width: 6px;
  height: 26vh;
  background: var(--arco-iris);
}

.hero__inner { position: relative; z-index: 1; }

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 800;
  margin-top: 1.4rem;
  max-width: 15ch;
  text-wrap: balance;
}

.hero__title em {
  display: block;
  font-style: italic;
  font-weight: 600;
  background: var(--arco-iris);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: 0.06em;
}

.hero__lead {
  margin-top: 1.6rem;
  max-width: 46ch;
  color: var(--paper-dim);
  font-size: var(--fs-lead);
}

.hero__actions {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Faixa de serviços rolante */
.ticker {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(6, 6, 7, 0.35);
  overflow: hidden;
  padding-block: 0.85rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.ticker__track { display: flex; width: max-content; }

.ticker__group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-right: 1.5rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--paper-dim);
  white-space: nowrap;
}

.ticker__group i { color: var(--red); font-style: normal; }

/* -------------------------------- 7. SOBRE -------------------------------- */
.section--sobre { border-top: 1px solid var(--line-soft); }

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.frame {
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 0.55rem;
}

.frame::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px;
  width: 62px; height: 3px;
  background: var(--arco-iris);
}

.frame img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--ink-700);
}

/* estado exibido quando a foto ainda não existe */
.frame img.is-placeholder {
  object-fit: contain;
  padding: 12%;
  opacity: 0.55;
}

.frame__caption {
  padding: 0.9rem 0.35rem 0.25rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.sobre__text .section__title { margin-top: 0.7rem; }
.sobre__text .prose { margin-top: 1.6rem; }

.pilares {
  margin-top: 2.6rem;
  display: grid;
  gap: 1.35rem;
}

.pilar {
  padding-left: 3.4rem;
  position: relative;
}

.pilar__num {
  position: absolute;
  left: 0; top: 0.1rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--red);
  letter-spacing: 0.02em;
}

.pilar__title { font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; }
.pilar__desc { color: var(--muted); font-size: 0.94rem; margin-top: 0.2rem; }

/* -------------------------------- 8. OBRAS -------------------------------- */
.section--obras { background: var(--ink-850); border-top: 1px solid var(--line-soft); }

/* Grade editorial: linhas de altura fixa e itens ocupando 2 linhas.
   Assim todas as obras de uma mesma faixa terminam na mesma altura,
   sem buracos, e as de destaque ficam naturalmente panorâmicas. */
.galeria {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-auto-rows: clamp(150px, 13vw, 205px);
  gap: clamp(0.6rem, 1.4vw, 1.1rem);
}

/* Ritmo editorial em ciclos de 6 obras, sempre fechando a linha:
   larga + estreita · estreita + larga · média + média            */
.obra { grid-column: span 2; grid-row: span 2; }
.obra:nth-child(6n + 1),
.obra:nth-child(6n + 4) { grid-column: span 4; }
.obra:nth-child(6n + 5),
.obra:nth-child(6n + 6) { grid-column: span 3; }

/* Com um número ímpar de obras sobraria um vão na última linha:
   nesse caso a obra final ocupa a largura inteira. */
.obra:last-child:nth-child(odd) { grid-column: 1 / -1; }

.obra__btn {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  cursor: zoom-in;
}

.obra__btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(6, 6, 7, 0.78));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.obra__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease), filter 0.7s var(--ease);
}

.obra__btn:hover .obra__img,
.obra__btn:focus-visible .obra__img { transform: scale(1.05); }

.obra__btn:hover::after,
.obra__btn:focus-visible::after { opacity: 1; }

.obra__info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 1;
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  text-align: left;
  transform: translateY(10px);
  opacity: 0;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.obra__btn:hover .obra__info,
.obra__btn:focus-visible .obra__info { opacity: 1; transform: none; }

.obra__titulo { font-size: 1rem; font-weight: 700; }

.obra__meta {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

/* Placeholder de obra (enquanto a foto não é adicionada) */
.obra--vazia .obra__btn { cursor: default; }

.obra__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  background:
    repeating-linear-gradient(135deg,
      rgba(244, 241, 236, 0.035) 0 12px,
      transparent 12px 24px),
    var(--ink-700);
  color: var(--muted);
}

.obra__placeholder-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: rgba(244, 241, 236, 0.22);
  line-height: 1;
}

.obra__placeholder-txt {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  max-width: 26ch;
}

/* ------------------------------ 9. SERVIÇOS ------------------------------ */
.servicos { border-top: 1px solid var(--line); }

.servico {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 1.05fr);
  align-items: baseline;
  gap: 1rem 1.5rem;
  padding-block: clamp(1.5rem, 3vw, 2.2rem);
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: padding-left var(--dur) var(--ease);
}

.servico::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--arco-iris);
  transform: scaleY(0);
  transform-origin: 50% 100%;
  transition: transform var(--dur) var(--ease);
}

.servico:hover::before { transform: scaleY(1); transform-origin: 50% 0; }
.servico:hover { padding-left: 1.2rem; }

.servico__num {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--red);
}

.servico__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.015em;
}

.servico__desc { color: var(--muted); font-size: 0.96rem; }

/* ------------------------------ 10. PROCESSO ------------------------------ */
.section--processo { background: var(--ink-850); border-top: 1px solid var(--line-soft); }

.processo {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.etapa {
  border-top: 2px solid var(--line);
  padding-top: 1.4rem;
  position: relative;
}

.etapa::before {
  content: "";
  position: absolute;
  left: 0; top: -2px;
  width: 34%; height: 2px;
  background: var(--red);
}

.etapa__num {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  color: rgba(244, 241, 236, 0.16);
  line-height: 1;
  display: block;
}

.etapa__title { font-size: 1.18rem; font-weight: 700; margin-top: 0.6rem; }
.etapa__desc { color: var(--muted); font-size: 0.94rem; margin-top: 0.4rem; }

/* ------------------------------ 11. CONTATO ------------------------------ */
.section--contato {
  text-align: center;
  border-top: 1px solid var(--line-soft);
  overflow: hidden;
  isolation: isolate;
}

.contato__glow {
  position: absolute;
  z-index: -1;
  left: 50%; top: 30%;
  translate: -50% -50%;
  width: min(120vw, 1100px);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(216, 35, 42, 0.22), transparent 62%);
  pointer-events: none;
}

.contato__inner { display: flex; flex-direction: column; align-items: center; }

.contato__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  margin-top: 1rem;
  text-wrap: balance;
}

.contato__title em {
  font-style: italic;
  font-weight: 600;
  color: var(--paper-dim);
}

.contato__lead {
  margin-top: 1.2rem;
  max-width: 42ch;
  color: var(--muted);
  font-size: var(--fs-lead);
}

.contato__actions { margin-top: 2.2rem; }

.config-alert {
  margin-top: 1.6rem;
  border: 1px dashed var(--red);
  color: var(--paper-dim);
  padding: 0.75rem 1.1rem;
  font-size: 0.86rem;
  max-width: 40rem;
}

.contato__links {
  margin-top: 3rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 3rem;
  width: 100%;
}

.contato__links a {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem 0.25rem;
  transition: color var(--dur) var(--ease);
}
.contato__links a:hover { color: var(--red-soft); }

.contato__label {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.contato__value { font-weight: 700; font-size: 1.02rem; }

/* ------------------------------- 12. FOOTER ------------------------------- */
.footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 6vw, 4rem);
  background: var(--ink-850);
}

.footer__inner {
  display: grid;
  gap: 1.5rem;
  justify-items: center;
  text-align: center;
}

.footer__brand img { width: clamp(180px, 34vw, 260px); height: auto; }

.footer__phrase {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--paper-dim);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.75rem;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.footer__links a { color: var(--paper-dim); transition: color var(--dur) var(--ease); }
.footer__links a:hover { color: var(--red-soft); }

.footer__copy { font-size: 0.78rem; color: var(--muted); }

/* --------------------------- 13. BOTÃO FLUTUANTE --------------------------- */
.fab {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.25rem;
  background: var(--red);
  color: #fff;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.45);
  transition: background-color var(--dur) var(--ease), transform 0.25s var(--ease);
}
.fab:hover { background: var(--red-soft); transform: translateY(-2px); }
.fab__icon { display: flex; }

/* ------------------------------ 14. LIGHTBOX ------------------------------ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: var(--overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(0.25rem, 2vw, 1.5rem);
  padding: clamp(3.5rem, 7vw, 5rem) clamp(0.5rem, 3vw, 2.5rem);
}

.lightbox[hidden] { display: none; }

.lightbox__figure {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  min-width: 0;
  max-height: 100%;
}

.lightbox__img {
  max-width: 100%;
  max-height: 74svh;
  width: auto;
  object-fit: contain;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.lightbox__caption {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  text-align: center;
}

.lightbox__title { font-weight: 700; font-size: 1.02rem; }

.lightbox__meta,
.lightbox__counter {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.lightbox__close {
  position: absolute;
  top: clamp(0.75rem, 2vw, 1.5rem);
  right: clamp(0.75rem, 2vw, 1.5rem);
  width: 46px; height: 46px;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.lightbox__close:hover { background: var(--red); border-color: var(--red); }

.lightbox__nav {
  width: 52px; height: 52px;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex: none;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.lightbox__nav:hover { background: var(--red); border-color: var(--red); }
.lightbox__nav--prev { grid-column: 1; }
.lightbox__nav--next { grid-column: 3; }