/* ===========================================================
   Caiçara Studio — design inspirado no minimalismo editorial
   de estúdios de arquitetura (referência: mk27.com)
   =========================================================== */

:root {
  --color-bg: #f6f2ea;
  --color-bg-alt: #efe8db;
  --color-dark: #16140f;
  --color-dark-alt: #1f1c16;
  --color-text: #2a2620;
  --color-muted: #7a7266;
  --color-accent: #b1602f;
  --color-accent-2: #5c6b4e;
  --color-line: rgba(22, 20, 15, 0.12);
  --color-line-light: rgba(246, 242, 234, 0.18);

  --font-display: "Fraunces", serif;
  --font-nav: "Jost", sans-serif;
  --font-body: "Inter", sans-serif;

  --container: 1240px;
  --transition: 0.5s cubic-bezier(.65,0,.35,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
}

.eyebrow {
  font-family: var(--font-nav);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 18px;
  font-weight: 500;
}
.eyebrow-light { color: #d8b48f; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-dark);
}

/* ---------- Preloader ---------- */
.preloader {
  position: fixed;
  inset: 0;
  background: var(--color-dark);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  font-family: var(--font-nav);
  letter-spacing: 0.3em;
  font-size: 13px;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
.preloader.hidden { opacity: 0; visibility: hidden; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  transition: background var(--transition), padding var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(246, 242, 234, 0.92);
  backdrop-filter: blur(10px);
  border-color: var(--color-line);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding var(--transition);
}
.site-header.scrolled .header-inner { padding: 18px 48px; }

.logo {
  font-family: var(--font-nav);
  font-size: 15px;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--color-bg);
  transition: color var(--transition);
}
.logo span {
  display: block;
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.32em;
  color: #e3c39c;
  margin-top: 2px;
  transition: color var(--transition);
}
.site-header.scrolled .logo { color: var(--color-dark); }
.site-header.scrolled .logo span { color: var(--color-accent); }

.main-nav { display: flex; gap: 40px; }
.main-nav a {
  font-family: var(--font-nav);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-bg);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}
.main-nav a:hover::after { width: 100%; }
.site-header.scrolled .main-nav a { color: var(--color-dark); }

.header-right { display: flex; align-items: center; gap: 28px; }

.btn-ghost {
  font-family: var(--font-nav);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-bg);
  border: 1px solid var(--color-bg);
  padding: 10px 22px;
  border-radius: 100px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-ghost:hover { background: var(--color-bg); color: var(--color-dark); }
.site-header.scrolled .btn-ghost { color: var(--color-dark); border-color: var(--color-dark); }
.site-header.scrolled .btn-ghost:hover { background: var(--color-dark); color: var(--color-bg); }

.btn-solid {
  font-family: var(--font-nav);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--color-dark);
  color: var(--color-bg);
  padding: 15px 30px;
  border-radius: 100px;
  transition: background var(--transition), transform var(--transition);
}
.btn-solid:hover { background: var(--color-accent); transform: translateY(-2px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}
.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--color-bg);
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}
.site-header.scrolled .nav-toggle span { background: var(--color-dark); }
.nav-toggle.open span { background: var(--color-bg) !important; }
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Mobile nav ---------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--color-dark);
  z-index: 400;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 120px 48px 60px;
  transform: translateY(-100%);
  transition: transform 0.6s cubic-bezier(.65,0,.35,1);
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav nav { display: flex; flex-direction: column; gap: 22px; }
.mobile-nav nav a {
  font-family: var(--font-display);
  font-size: 38px;
  color: var(--color-bg);
}
.mobile-nav-footer { color: var(--color-muted); font-size: 13px; }
.mobile-nav-footer p { margin-bottom: 6px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(15%) contrast(1.05) brightness(0.72);
  transform: scale(1.08);
  animation: heroZoom 14s ease-out forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 48px 96px;
  color: var(--color-bg);
}
.hero-content .eyebrow { color: #e3c39c; }
.hero-content h1 {
  font-size: clamp(40px, 6.5vw, 92px);
  font-weight: 300;
  line-height: 1.05;
  color: var(--color-bg);
  max-width: 900px;
}

.scroll-cue {
  position: absolute;
  right: 48px; bottom: 48px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-bg);
}
.scroll-cue span {
  font-family: var(--font-nav);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.scroll-cue i {
  width: 1px; height: 60px;
  background: rgba(246,242,234,0.4);
  position: relative;
  overflow: hidden;
}
.scroll-cue i::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 30%;
  background: var(--color-bg);
  animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(300%); }
}

/* ---------- Manifesto ---------- */
.manifesto {
  padding: 160px 0;
  background: var(--color-bg);
}
.split { display: flex; gap: 80px; align-items: flex-start; }
.split .eyebrow { flex: 0 0 200px; padding-top: 8px; }
.manifesto h2 {
  font-size: clamp(28px, 3.4vw, 46px);
  font-weight: 300;
  line-height: 1.35;
  max-width: 900px;
}

/* ---------- Section head ---------- */
.section-head { margin-bottom: 56px; }
.section-head h2 {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
}

/* ---------- Projects ---------- */
.projects { padding: 60px 0 160px; }

.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  font-family: var(--font-nav);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 10px 20px;
  border: 1px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-muted);
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--color-dark); color: var(--color-dark); }
.filter-btn.active { background: var(--color-dark); color: var(--color-bg); border-color: var(--color-dark); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.project-card.hidden-card { display: none; }
.project-img { overflow: hidden; aspect-ratio: 3/4; }
.project-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(25%) contrast(1.02);
  transition: transform 0.9s cubic-bezier(.25,.8,.25,1), filter 0.6s ease;
}
.project-card:hover .project-img img { transform: scale(1.08); filter: grayscale(0%) contrast(1.05); }

.project-info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 28px 26px;
  background: linear-gradient(to top, rgba(15,13,9,0.82) 0%, rgba(15,13,9,0) 100%);
  color: var(--color-bg);
  transform: translateY(12px);
  opacity: 0;
  transition: all var(--transition);
}
.project-card:hover .project-info { transform: translateY(0); opacity: 1; }
.project-info h3 { color: var(--color-bg); font-size: 20px; font-weight: 400; margin-bottom: 4px; }
.project-info p { font-family: var(--font-nav); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: #d8cfc0; }

/* ---------- Studio ---------- */
.studio { padding: 40px 0 160px; background: var(--color-bg); }
.split-2 {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 90px;
  align-items: center;
}
.studio-img { aspect-ratio: 4/5; overflow: hidden; }
.studio-img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(30%); }
.studio-text h2 {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 300;
  line-height: 1.3;
  margin-bottom: 26px;
}
.studio-text p { color: var(--color-muted); max-width: 540px; font-size: 15.5px; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
}
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 500;
  color: var(--color-accent);
}
.stat span {
  font-family: var(--font-nav);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ---------- Process ---------- */
.process { padding: 60px 0 170px; }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}
.process-step { border-top: 1px solid var(--color-line); padding-top: 28px; }
.step-num {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-accent);
  display: block;
  margin-bottom: 22px;
}
.process-step h3 { font-size: 22px; font-weight: 400; margin-bottom: 14px; }
.process-step p { color: var(--color-muted); font-size: 14.5px; }

/* ---------- Contact ---------- */
.contact {
  background: var(--color-dark);
  color: var(--color-bg);
  padding: 150px 0;
}
.contact-text h2 {
  color: var(--color-bg);
  font-size: clamp(30px, 3.6vw, 46px);
  font-weight: 300;
  line-height: 1.3;
  margin-bottom: 20px;
}
.contact-text > p { color: #a8a196; max-width: 420px; margin-bottom: 40px; font-size: 15px; }

.contact-info { margin-bottom: 40px; }
.contact-info li {
  padding: 18px 0;
  border-top: 1px solid var(--color-line-light);
  font-size: 16px;
}
.contact-info li:last-child { border-bottom: 1px solid var(--color-line-light); }
.contact-info span {
  display: block;
  font-family: var(--font-nav);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.socials { display: flex; gap: 24px; }
.socials a {
  font-family: var(--font-nav);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a8a196;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.socials a:hover { color: var(--color-bg); border-color: var(--color-bg); }

.contact-form { display: flex; flex-direction: column; gap: 22px; }
.form-row { display: flex; flex-direction: column; gap: 10px; }
.form-row label {
  font-family: var(--font-nav);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #a8a196;
}
.form-row input, .form-row textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-line-light);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 10px 0;
  resize: none;
  transition: border-color var(--transition);
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.contact-form .btn-solid {
  background: var(--color-accent);
  color: var(--color-bg);
  align-self: flex-start;
  margin-top: 10px;
}
.contact-form .btn-solid:hover { background: var(--color-bg); color: var(--color-dark); }
.form-note { font-size: 13px; color: #d8b48f; min-height: 18px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-dark-alt); color: #a8a196; padding: 44px 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-inner .logo { color: var(--color-bg); }
.footer-nav { display: flex; gap: 28px; }
.footer-nav a {
  font-family: var(--font-nav);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a8a196;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-bg); }
.footer-contact {
  font-size: 12.5px;
  line-height: 1.7;
  color: #a8a196;
}
.copyright { font-size: 12.5px; width: 100%; padding-top: 8px; border-top: 1px solid var(--color-line-light); }

/* ---------- WhatsApp floating button ---------- */
.whatsapp-btn {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 600;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-btn svg { width: 30px; height: 30px; }
.whatsapp-btn:hover { transform: scale(1.08); box-shadow: 0 10px 28px rgba(0,0,0,0.32); }

@media (max-width: 620px) {
  .whatsapp-btn { right: 18px; bottom: 18px; width: 52px; height: 52px; }
  .whatsapp-btn svg { width: 26px; height: 26px; }
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(.25,.8,.25,1), transform 0.9s cubic-bezier(.25,.8,.25,1);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .split-2 { grid-template-columns: 1fr; gap: 48px; }
  .studio-img { max-width: 460px; }
}

@media (max-width: 860px) {
  .main-nav, .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  .split { flex-direction: column; gap: 24px; }
  .split .eyebrow { flex: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .container { padding: 0 24px; }
  .header-inner { padding: 22px 24px; }
  .hero-content { padding: 0 24px 64px; }
  .scroll-cue { right: 24px; bottom: 24px; }
  .project-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .manifesto { padding: 110px 0; }
  .projects { padding: 40px 0 100px; }
  .studio { padding: 20px 0 110px; }
  .process { padding: 40px 0 110px; }
  .contact { padding: 100px 0; }
  .mobile-nav { padding: 100px 24px 40px; }
  .mobile-nav nav a { font-size: 30px; }
}