/* Irlan Oliveira Arquitetura & Interiores — preto, prata e marfim */
:root {
  --preto: #0B0B0C;
  --carvao: #141416;
  --grafite: #1D1D21;
  --linha: rgba(236, 233, 226, 0.12);
  --prata: #C9CCD1;
  --prata-escura: #8E939B;
  --marfim: #ECE9E2;
  --tinta: #141416;
  --tinta-suave: #5B5B60;
  --bronze: #B9975B;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --container: min(1120px, calc(100% - 48px));
  --serif: 'Instrument Serif', Georgia, serif;
  --sans: 'Manrope', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: var(--sans); font-size: 16px; line-height: 1.55;
  color: var(--marfim); background: var(--preto);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
h1, h2, h3 { font-weight: 400; text-wrap: balance; }
h2 { font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); line-height: 1.05; letter-spacing: -0.01em; }
h2 em { font-style: italic; color: var(--prata); }
p { text-wrap: pretty; }
.container { width: var(--container); margin: 0 auto; }

.pular { position: absolute; left: 16px; top: -64px; z-index: 100; background: var(--marfim); color: var(--preto); padding: 8px 12px; font-size: 14px; }
.pular:focus { top: 16px; }
:focus-visible { outline: 2px solid var(--bronze); outline-offset: 4px; }

/* Botões */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 15px/1 var(--sans); letter-spacing: 0.01em;
  padding: 16px 26px; border: 1px solid transparent; cursor: pointer;
  transition: transform 600ms var(--ease), background-color 600ms var(--ease), color 600ms var(--ease), border-color 600ms var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-claro { background: var(--marfim); color: var(--preto); }
.btn-claro:hover { background: #fff; }
.btn-linha { border-color: rgba(236, 233, 226, 0.4); color: var(--marfim); }
.btn-linha:hover { border-color: var(--marfim); background: rgba(236, 233, 226, 0.06); }
.btn-sm { padding: 10px 18px; font-size: 13px; }

/* ---------- Cabeçalho ---------- */
.cabecalho { position: fixed; inset: 0 0 auto 0; z-index: 50; transition: background-color 500ms var(--ease), box-shadow 500ms var(--ease); }
.cabecalho.rolou, body.menu-aberto .cabecalho { background: rgba(11, 11, 12, 0.92); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--linha); }
.nav { position: relative; z-index: 45; display: flex; align-items: center; justify-content: space-between; gap: 32px; width: var(--container); margin: 0 auto; height: 72px; }
.marca { display: flex; align-items: center; gap: 10px; }
.marca img { height: 34px; width: auto; }
.marca-texto { display: flex; flex-direction: column; line-height: 1; }
.marca-texto strong { font-size: 15px; font-weight: 400; letter-spacing: 0.14em; text-transform: uppercase; }
.marca-texto b { font-weight: 600; }
.marca-texto small { font-size: 9px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--prata); margin-top: 4px; }
.nav-direita { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--prata); position: relative; transition: color 400ms var(--ease); }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: var(--marfim); transition: right 500ms var(--ease); }
.nav-links a:hover { color: var(--marfim); }
.nav-links a:hover::after { right: 0; }
.hamburguer { display: none; width: 40px; height: 40px; background: none; border: 0; cursor: pointer; position: relative; }
.hamburguer span { position: absolute; left: 8px; right: 8px; height: 1.5px; background: var(--marfim); transition: transform 500ms var(--ease), top 500ms var(--ease); }
.hamburguer span:first-child { top: 15px; } .hamburguer span:last-child { top: 24px; }
body.menu-aberto .hamburguer span:first-child { top: 19px; transform: rotate(45deg); }
body.menu-aberto .hamburguer span:last-child { top: 19px; transform: rotate(-45deg); }
.menu { display: none; }

/* ---------- Abertura ---------- */
.hero { position: relative; height: 600px; display: flex; align-items: flex-end; overflow: hidden; }
.hero-fundo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11,11,12,0.35) 0%, rgba(11,11,12,0.15) 40%, rgba(11,11,12,0.88) 100%); }
.hero-texto { position: relative; z-index: 2; padding-bottom: 56px; max-width: 760px; margin-left: calc((100% - min(1120px, 100% - 48px)) / 2); }
.hero h1 { font-family: var(--serif); font-size: clamp(2.8rem, 6.4vw, 5.4rem); line-height: 0.98; letter-spacing: -0.015em; max-width: 12ch; }
.hero h1 sup { font-family: var(--sans); font-size: 0.26em; vertical-align: top; margin-left: 4px; color: var(--prata); }
.hero-sub { margin-top: 20px; max-width: 520px; font-size: 17px; color: var(--prata); }
.hero-acoes { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-legenda { position: absolute; right: 24px; bottom: 20px; z-index: 2; font-size: 12px; letter-spacing: 0.04em; color: var(--prata-escura); }

/* ---------- Faixa ---------- */
.faixa { border-block: 1px solid var(--linha); background: var(--carvao); }
.faixa ul { display: flex; gap: 40px; justify-content: space-between; padding: 18px 0; overflow-x: auto; scrollbar-width: none; white-space: nowrap; font-size: 13px; color: var(--prata); letter-spacing: 0.02em; }
.faixa ul::-webkit-scrollbar { display: none; }

/* ---------- Projetos ---------- */
.projetos { padding: 48px 0; }
.projetos-topo { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.projetos-topo p { color: var(--prata-escura); max-width: 420px; font-size: 15px; }
.grade { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: repeat(2, 1fr); gap: 14px; height: 480px; }
.cartao { position: relative; overflow: hidden; background: var(--grafite); display: block; }
.cartao.grande { grid-row: 1 / 3; }
.cartao img { width: 100%; height: 100%; object-fit: cover; transition: transform 1200ms var(--ease); }
.cartao:hover img { transform: scale(1.04); }
.cartao-rotulo { position: absolute; left: 0; right: 0; bottom: 0; padding: 48px 20px 18px; background: linear-gradient(180deg, transparent, rgba(11,11,12,0.85)); display: flex; flex-direction: column; gap: 2px; }
.cartao-rotulo strong { font-family: var(--serif); font-weight: 400; font-size: 24px; line-height: 1.1; }
.cartao-rotulo span { font-size: 13px; color: var(--prata); }
.cartao.grande .cartao-rotulo strong { font-size: 32px; }

/* ---------- Trilho ---------- */
.trilho-bloco { padding: 40px 0 56px; background: var(--carvao); border-block: 1px solid var(--linha); }
.trilho-topo { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.trilho-topo h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.setas { display: flex; gap: 8px; }
.setas button { width: 44px; height: 44px; border: 1px solid var(--linha); background: none; color: var(--marfim); font-size: 18px; cursor: pointer; transition: background-color 400ms var(--ease), border-color 400ms var(--ease); }
.setas button:hover { background: var(--grafite); border-color: var(--prata-escura); }
.trilho { display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding-inline: calc((100% - min(1120px, 100% - 48px)) / 2); scroll-padding-inline: calc((100% - min(1120px, 100% - 48px)) / 2); }
.trilho::-webkit-scrollbar { display: none; }
.trilho li { flex: 0 0 272px; scroll-snap-align: start; }
.trilho img { aspect-ratio: 3 / 4; width: 100%; object-fit: cover; background: var(--grafite); }
.trilho span { display: block; padding-top: 12px; font-size: 13px; color: var(--prata-escura); line-height: 1.4; }
.trilho strong { display: block; font-family: var(--serif); font-weight: 400; font-size: 20px; color: var(--marfim); }

/* ---------- Caso ---------- */
.caso { padding: 64px 0; }
.caso-grade { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; align-items: center; }
.caso-texto p { margin-top: 16px; color: var(--prata); font-size: 16px; }
.caso-texto h2 { max-width: 15ch; }
.credito { font-size: 12px !important; color: var(--prata-escura) !important; letter-spacing: 0.04em; margin-top: 24px !important; }
.mosaico { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 12px; height: 520px; }
.mosaico img { width: 100%; height: 100%; object-fit: cover; }
.mosaico img:first-child { grid-row: 1 / 3; }

/* ---------- Escritório (bloco claro) ---------- */
.escritorio { background: var(--marfim); color: var(--tinta); padding: 64px 0; }
.escritorio-topo { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: end; margin-bottom: 28px; }
.escritorio-topo p { color: var(--tinta-suave); max-width: 460px; }
.servicos { display: grid; grid-template-columns: 1fr 1fr; column-gap: 48px; border-top: 1px solid rgba(20,20,22,0.15); }
.servicos li { display: grid; grid-template-columns: 48px 1fr; grid-template-rows: auto auto; column-gap: 12px; padding: 16px 0; border-bottom: 1px solid rgba(20,20,22,0.15); }
.servicos .num { grid-row: 1 / 3; font-family: var(--serif); font-size: 26px; line-height: 1; color: var(--bronze); padding-top: 2px; }
.servicos h3 { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.servicos p { font-size: 14px; color: var(--tinta-suave); margin-top: 2px; }

/* ---------- Sobre ---------- */
.sobre { padding: 64px 0; }
.sobre-grade { display: grid; grid-template-columns: 4fr 8fr; gap: 56px; align-items: center; }
.retrato { position: relative; }
.retrato img { width: 100%; max-width: 360px; filter: grayscale(1); }
.retrato::after { content: ""; position: absolute; left: -16px; bottom: -16px; width: 60%; height: 60%; border: 1px solid var(--linha); z-index: -1; }
.sobre-cargo { margin-top: 6px; color: var(--bronze); font-size: 14px; letter-spacing: 0.04em; }
.sobre-texto p + p { margin-top: 14px; }
.sobre-texto p:not(.sobre-cargo) { color: var(--prata); font-size: 16px; }
.sobre-texto .sobre-cargo + p { margin-top: 20px; }
.sobre-texto em { color: var(--marfim); }
.link-seta { display: inline-block; margin-top: 22px; font-weight: 600; font-size: 14px; border-bottom: 1px solid var(--prata-escura); padding-bottom: 3px; transition: border-color 400ms var(--ease), color 400ms var(--ease); }
.link-seta:hover { border-color: var(--marfim); }

/* ---------- Reconhecimento ---------- */
.reconhecimento { padding: 48px 0 56px; border-top: 1px solid var(--linha); background: var(--carvao); }
.marcos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.marcos li { border-left: 1px solid var(--linha); padding-left: 18px; }
.ano { display: block; font-family: var(--serif); font-size: 44px; line-height: 1; margin-bottom: 14px; color: var(--marfim); }
.marcos strong { display: block; font-size: 15px; font-weight: 600; }
.marcos p { font-size: 14px; color: var(--prata-escura); margin-top: 6px; }

/* ---------- Contato ---------- */
.contato { padding: 64px 0; }
.contato-grade { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.contato-texto > p { margin-top: 14px; color: var(--prata); }
.contato-texto .btn { margin-top: 24px; }
.dados { margin-top: 28px; display: grid; gap: 14px; }
.dados dt { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--prata-escura); }
.dados dd { font-size: 15px; color: var(--marfim); }
.dados a { border-bottom: 1px solid var(--linha); transition: border-color 400ms var(--ease); }
.dados a:hover { border-color: var(--marfim); }
.mapa { aspect-ratio: 4 / 3; max-height: 420px; background: var(--grafite); }
.mapa iframe { width: 100%; height: 100%; border: 0; filter: grayscale(1) invert(0.92) contrast(0.9); }

/* ---------- Rodapé ---------- */
.rodape { border-top: 1px solid var(--linha); padding: 32px 0 40px; font-size: 13px; color: var(--prata-escura); }
.rodape-grade { display: grid; grid-template-columns: auto 1fr auto; gap: 32px; align-items: center; }
.rodape img { height: 26px; width: auto; opacity: 0.9; }
.rodape-credito { text-align: right; }

/* WhatsApp flutuante */
.zap { position: fixed; right: 20px; bottom: 20px; z-index: 40; width: 54px; height: 54px; border-radius: 50%; background: #25D366; color: #fff; display: grid; place-items: center; box-shadow: 0 10px 30px rgba(0,0,0,0.4); opacity: 0; transform: translateY(16px); pointer-events: none; transition: opacity 500ms var(--ease), transform 500ms var(--ease); }
.zap.visivel { opacity: 1; transform: none; pointer-events: auto; }

/* Entrada ao rolar */
.revelar { opacity: 0; transform: translateY(18px); transition: opacity 900ms var(--ease), transform 900ms var(--ease); }
.revelar.visivel { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .revelar { opacity: 1; transform: none; transition: none; }
  .cartao img, .btn { transition: none; }
}

/* ---------- Telas menores ---------- */
@media (max-width: 1000px) {
  .caso-grade, .sobre-grade, .contato-grade { grid-template-columns: 1fr; gap: 32px; }
  .caso-texto h2 { max-width: none; }
  .marcos { grid-template-columns: 1fr 1fr; }
  .mapa { max-height: 320px; }
}
@media (max-width: 800px) {
  .nav-links, .nav .btn { display: none; }
  .hamburguer { display: block; }
  .menu { display: flex; flex-direction: column; gap: 4px; position: fixed; inset: 72px 0 auto 0; z-index: 44; padding: 12px 24px 28px; background: rgba(11,11,12,0.97); transform: translateY(calc(-100% - 80px)); transition: transform 600ms var(--ease); border-bottom: 1px solid var(--linha); }
  .menu a { padding: 14px 0; font-size: 20px; font-family: var(--serif); border-bottom: 1px solid var(--linha); }
  .menu .btn { margin-top: 16px; border: 0; justify-content: center; font-family: var(--sans); font-size: 15px; }
  body.menu-aberto .menu { transform: none; }
  .hero { height: 560px; }
  .hero-texto { padding-bottom: 60px; }
  .hero-sub { font-size: 15px; }
  .hero-legenda { left: 24px; right: auto; bottom: 14px; }
  .projetos { padding: 40px 0 32px; }
  .projetos-topo { flex-direction: column; align-items: flex-start; gap: 8px; }
  .grade { grid-template-columns: 1fr 1fr; grid-template-rows: 300px 180px; height: auto; gap: 10px; }
  .cartao.grande { grid-column: 1 / 3; grid-row: 1; }
  .cartao-rotulo { padding: 36px 14px 12px; }
  .cartao-rotulo strong, .cartao.grande .cartao-rotulo strong { font-size: 20px; }
  .cartao-rotulo span { font-size: 12px; }
  .trilho li { flex-basis: 220px; }
  .caso, .escritorio, .sobre, .contato { padding: 48px 0; }
  .mosaico { display: flex; gap: 10px; overflow-x: auto; height: 300px; scrollbar-width: none; margin-inline: -24px; padding-inline: 24px; }
  .mosaico img { flex: 0 0 auto; width: auto; height: 100%; }
  .escritorio-topo, .servicos { grid-template-columns: 1fr; }
  .escritorio-topo { gap: 10px; margin-bottom: 20px; }
  .retrato img { max-width: 240px; }
  .marcos { grid-template-columns: 1fr; gap: 20px; }
  .ano { font-size: 36px; margin-bottom: 8px; }
  .rodape-grade { grid-template-columns: 1fr; gap: 14px; }
  .rodape-credito { text-align: left; }
}