/* ================================================================
   RAFAEL VASCONCELOS — ARQUITETURA · quiet luxury
   Paleta: off-white / cinza concreto / carvão / madeira natural
   Mobile-first
================================================================ */
:root {
  --offwhite: #F4F1EB;
  --paper: #FAF8F4;
  --concreto: #A8A29A;
  --concreto-claro: #DEDAD2;
  --carvao: #191816;
  --carvao-suave: #23211E;
  --madeira: #A9713E;
  --madeira-clara: #C4915C;
  --linho: #E9E3D8;
  --texto: #2B2926;
  --texto-suave: #6E6961;
  --font-body: "Montserrat", sans-serif;
  --font-display: "Playfair Display", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.7;
  color: var(--texto);
  background: var(--offwhite);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section--tight { padding-top: 48px; }

/* ---------- tipografia de seção ---------- */
.section__eyebrow {
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--madeira);
  font-weight: 500;
  margin-bottom: 20px;
}
.section__eyebrow--light { color: var(--madeira-clara); }
.section__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(30px, 5.4vw, 48px);
  line-height: 1.15;
  color: var(--carvao);
  margin-bottom: 24px;
}
.section__title em, .manifesto__quote em, .hero__title em {
  font-style: italic;
  color: var(--madeira);
}
.section__title--light { color: var(--offwhite); }
.section__title--light em { color: var(--madeira-clara); }

/* ---------- botões ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 16px 32px;
  border: 1px solid transparent;
  transition: background-color .3s ease, color .3s ease, border-color .3s ease;
  cursor: pointer;
}
.btn--primary { background: var(--madeira); color: var(--paper); }
.btn--primary:hover { background: var(--carvao); }
.btn--ghost { border-color: rgba(250, 248, 244, .55); color: var(--paper); }
.btn--ghost:hover { border-color: var(--paper); background: rgba(250, 248, 244, .08); }
.btn--full { width: 100%; }
.btn:focus-visible, a:focus-visible {
  outline: 2px solid var(--madeira);
  outline-offset: 3px;
}

/* ================= NAV ================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background-color .35s ease, box-shadow .35s ease;
}
.nav.scrolled {
  background: rgba(250, 248, 244, .92);
  box-shadow: 0 1px 0 rgba(25, 24, 22, .07);
}
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo { display: flex; align-items: center; gap: 12px; }
.nav__logo-mark {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--paper);
  background: var(--carvao);
  width: 42px; height: 42px;
  display: grid; place-items: center;
  transition: background-color .3s ease;
}
.nav.scrolled .nav__logo-mark { background: var(--carvao); }
.nav__logo-name {
  display: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--paper);
  line-height: 1.3;
  transition: color .3s ease;
}
.nav__logo-name em {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
  color: var(--concreto);
}
.nav.scrolled .nav__logo-name { color: var(--carvao); }
.nav__links {
  display: none;
  align-items: center;
  gap: 36px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--paper);
  transition: color .3s ease;
}
.nav.scrolled .nav__links { color: var(--texto); }
.nav__links a { opacity: .85; transition: opacity .25s ease; }
.nav__links a:hover { opacity: 1; }
.nav__cta {
  border: 1px solid currentColor;
  padding: 10px 20px;
  opacity: 1 !important;
}
.nav__burger {
  width: 40px; height: 40px;
  background: none; border: none;
  display: grid; place-items: center; gap: 0;
  cursor: pointer;
}
.nav__burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--paper);
  margin: 3px 0;
  transition: background-color .3s ease, transform .3s ease;
}
.nav.scrolled .nav__burger span, .nav.menu-open .nav__burger span { background: var(--carvao); }
.nav.menu-open .nav__burger span:first-child { transform: translateY(4px) rotate(45deg); }
.nav.menu-open .nav__burger span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* menu mobile aberto */
.nav.menu-open { background: var(--paper); }
.nav.menu-open .nav__links {
  display: flex;
  position: absolute;
  top: 100%; left: 0; right: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  background: var(--paper);
  color: var(--texto);
  padding: 12px 24px 32px;
  box-shadow: 0 24px 32px -20px rgba(25, 24, 22, .25);
}
.nav.menu-open .nav__links a { padding: 12px 0; width: 100%; }
.nav.menu-open .nav__cta { text-align: center; margin-top: 12px; padding: 14px 20px; }
.nav.menu-open .nav__logo-mark { background: var(--carvao); }
.nav.menu-open .nav__logo-name { color: var(--carvao); }

/* ================= HERO ================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 62% center;
}
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(200deg, rgba(25,24,22,.08) 30%, rgba(25,24,22,.62) 82%),
              linear-gradient(0deg, rgba(25,24,22,.55) 0%, rgba(25,24,22,0) 45%);
}
.hero__content {
  position: relative;
  z-index: 1;
  padding-bottom: 96px;
  color: var(--paper);
}
.hero__eyebrow {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--linho);
  margin-bottom: 20px;
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(34px, 6.8vw, 64px);
  line-height: 1.12;
  max-width: 17ch;
  margin-bottom: 22px;
}
.hero__title em { color: var(--madeira-clara); }
.hero__sub {
  max-width: 52ch;
  font-size: 16px;
  font-weight: 300;
  color: rgba(250, 248, 244, .88);
  margin-bottom: 36px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__scroll {
  position: absolute;
  bottom: 28px; right: 28px;
  z-index: 1;
}
.hero__scroll span {
  display: block;
  width: 1px; height: 56px;
  background: rgba(250, 248, 244, .5);
  animation: scrollhint 2.4s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollhint {
  0%, 100% { transform: scaleY(.35); opacity: .4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ================= MANIFESTO ================= */
.manifesto { background: var(--paper); }
.manifesto__grid { display: grid; gap: 48px; }
.manifesto__quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
  color: var(--carvao);
  margin-bottom: 28px;
}
.manifesto__text p:not(:first-child):not(.section__eyebrow) {
  color: var(--texto-suave);
  margin-bottom: 18px;
  max-width: 56ch;
}
.manifesto__media { position: relative; }
.manifesto__media img { box-shadow: 24px 24px 0 var(--linho); }
.manifesto__media figcaption {
  margin-top: 34px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--concreto);
}

/* ================= PROJETOS ================= */
.projetos { background: var(--offwhite); }
.projetos__grid {
  display: grid;
  gap: 40px;
  margin-top: 48px;
}
.projeto__media { overflow: hidden; }
.projeto__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .8s cubic-bezier(.2, .6, .2, 1);
}
.projeto:hover .projeto__media img { transform: scale(1.045); }
.projeto__info { padding-top: 18px; }
.projeto__info h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 24px;
  color: var(--carvao);
}
.projeto__info p {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--texto-suave);
  margin-top: 6px;
}

/* ================= MÉTODO ================= */
.metodo { background: var(--carvao); color: var(--linho); }
.metodo__grid { display: grid; gap: 56px; }
.metodo__lead { color: rgba(233, 227, 216, .75); max-width: 46ch; margin-bottom: 36px; }
.metodo__media img { opacity: .92; }
.metodo__steps { list-style: none; display: grid; gap: 0; }
.metodo__steps li {
  padding: 28px 0;
  border-top: 1px solid rgba(233, 227, 216, .16);
}
.metodo__steps li:last-child { border-bottom: 1px solid rgba(233, 227, 216, .16); }
.metodo__num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
  color: var(--madeira-clara);
}
.metodo__steps h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 24px;
  color: var(--offwhite);
  margin: 6px 0 10px;
}
.metodo__steps p { color: rgba(233, 227, 216, .72); font-size: 15px; max-width: 52ch; }

/* ================= DEPOIMENTOS ================= */
.depoimentos { background: var(--paper); }
.depoimentos__grid { display: grid; gap: 40px; margin-top: 8px; }
.depoimento {
  border-left: 2px solid var(--madeira);
  padding-left: 26px;
}
.depoimento p {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--texto);
}
.depoimento footer { margin-top: 20px; font-size: 13px; }
.depoimento strong { display: block; font-weight: 600; letter-spacing: 0.06em; color: var(--carvao); }
.depoimento span { color: var(--texto-suave); letter-spacing: 0.06em; }

/* ================= CONTATO ================= */
.contato { background: var(--offwhite); }
.contato__grid { display: grid; gap: 48px; }
.contato__intro p:not(.section__eyebrow) { color: var(--texto-suave); max-width: 44ch; }
.contato__wa {
  display: inline-block;
  margin-top: 24px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--madeira);
  border-bottom: 1px solid currentColor;
  padding-bottom: 4px;
  transition: color .3s ease;
}
.contato__wa:hover { color: var(--carvao); }
.contato__form { display: grid; gap: 20px; }
.contato__form label { display: grid; gap: 8px; }
.contato__form span {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--texto-suave);
}
.contato__form input,
.contato__form select,
.contato__form textarea {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--texto);
  background: var(--paper);
  border: 1px solid var(--concreto-claro);
  padding: 14px 16px;
  transition: border-color .3s ease;
  border-radius: 0;
  width: 100%;
}
.contato__form input:focus,
.contato__form select:focus,
.contato__form textarea:focus {
  outline: none;
  border-color: var(--madeira);
}
.contato__form textarea { resize: vertical; }
.contato__nota {
  font-size: 12px;
  color: var(--concreto);
  text-align: center;
}

/* ================= FOOTER ================= */
.footer { background: var(--carvao); color: var(--linho); padding: 56px 0 28px; }
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(233, 227, 216, .14);
}
.footer__name {
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}
.footer__name em {
  font-family: var(--font-display);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0.04em;
  color: var(--concreto);
}
.footer__meta { font-size: 13px; color: rgba(233, 227, 216, .6); margin-top: 6px; }
.footer__links { display: flex; gap: 24px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; }
.footer__links a { opacity: .75; transition: opacity .25s ease; }
.footer__links a:hover { opacity: 1; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 12px;
  color: rgba(233, 227, 216, .55);
}
.footer__credit a { color: var(--madeira-clara); }

/* ================= WHATSAPP FLUTUANTE ================= */
.wa-float {
  position: fixed;
  bottom: 20px; right: 20px;
  z-index: 90;
  width: 54px; height: 54px;
  display: grid; place-items: center;
  background: var(--madeira);
  color: var(--paper);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(25, 24, 22, .3);
  transition: background-color .3s ease, transform .3s ease;
}
.wa-float:hover { background: var(--carvao); transform: translateY(-3px); }

/* ================= REVEAL ================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s ease, transform .9s cubic-bezier(.2, .6, .2, 1);
}
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll span { animation: none; }
}

/* ================================================================
   DESKTOP / TABLET
================================================================ */
@media (min-width: 768px) {
  .section { padding: 110px 0; }
  .section--tight { padding-top: 72px; }
  .nav__logo-name { display: block; }
  .hero__content { padding-bottom: 120px; }

  .manifesto__grid { grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
  .manifesto__media { margin-top: 40px; }

  .projetos__grid { grid-template-columns: 1fr 1fr; gap: 48px 40px; }
  .projeto--wide { grid-column: 1 / -1; }
  .projeto--wide .projeto__media img { aspect-ratio: 21 / 9; }
  /* assimetria controlada */
  .projeto:nth-child(3) { transform: translateY(48px); }

  .metodo__grid { grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
  .depoimentos__grid { grid-template-columns: 1fr 1fr; gap: 56px; }
  .contato__grid { grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
}

@media (min-width: 1024px) {
  .nav__links { display: flex; }
  .nav__burger { display: none; }
}