/* ============================================
   SAIA Arquitetura — Minimal & Elegant
   Ref: Studio Arthur Casas
   Palette: SAIA original (black, white, gray)
   ============================================ */

:root {
  --black: #1a1a1a;
  --dark: #2a2a2a;
  --gray-700: #444;
  --gray-500: #777;
  --gray-400: #999;
  --gray-300: #bbb;
  --gray-200: #ddd;
  --gray-100: #ededed;
  --light: #f5f5f3;
  --white: #fff;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: opacity var(--transition); }
a:hover { opacity: 0.6; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.4rem); }

p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--gray-500);
}

.label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gray-400);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 3rem;
}

@media (max-width: 768px) {
  .container { padding: 0 1.5rem; }
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.8rem 0;
  background: transparent;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(245, 245, 243, 0.95);
  backdrop-filter: blur(20px);
  padding: 1.2rem 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  color: var(--black);
  transition: opacity var(--transition);
}

.logo img {
  height: 22px;
  width: auto;
  display: block;
}

.logo .logo-dark { display: block; }
.logo .logo-light { display: none; }

.navbar--dark:not(.scrolled) .logo .logo-dark { display: none; }
.navbar--dark:not(.scrolled) .logo .logo-light { display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--black);
  opacity: 1;
}

/* Navbar on dark backgrounds */
.navbar--dark .logo,
.navbar--dark .nav-links a { color: var(--white); }
.navbar--dark .nav-links a:hover { color: var(--gray-300); opacity: 1; }
.navbar--dark .menu-toggle span { background: var(--white); }
.navbar--dark.scrolled .logo,
.navbar--dark.scrolled .nav-links a { color: var(--black); }
.navbar--dark.scrolled .nav-links a:hover { color: var(--gray-500); }
.navbar--dark.scrolled .menu-toggle span { background: var(--black); }

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 101;
}

.menu-toggle span {
  width: 24px;
  height: 1.5px;
  background: var(--black);
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -5px); }

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: 0;
    background: var(--light);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }
  .nav-links.open {
    opacity: 1;
    pointer-events: all;
  }
  .nav-links a { font-size: 1.2rem; color: var(--black) !important; }
}

/* ========================
   HOME — Split Layout
   ======================== */
.home-split {
  display: grid;
  grid-template-columns: 45% 55%;
  min-height: 100vh;
}

.home-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 4rem 4rem;
  background: var(--light);
}

.home-left .logo {
  margin-bottom: 1.2rem;
}

.home-left .logo img {
  height: 36px;
}

.home-tagline {
  font-size: 0.75rem;
  color: var(--gray-400);
  line-height: 1.7;
  letter-spacing: 0.05em;
  margin-bottom: 3rem;
}

.home-tagline em {
  font-style: italic;
  color: var(--gray-500);
}

.home-tagline-signature {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.68rem;
  color: var(--gray-300);
  letter-spacing: 0.08em;
}

.home-nav {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.home-nav a {
  font-size: 1.15rem;
  color: var(--gray-400);
  transition: color var(--transition);
  letter-spacing: 0.02em;
}

.home-nav a:hover {
  color: var(--black);
  opacity: 1;
}

.home-right {
  position: relative;
  overflow: hidden;
}

.home-right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
}

@media (max-width: 768px) {
  .home-split {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .home-left {
    padding: 8rem 1.5rem 3rem;
    min-height: 50vh;
    justify-content: flex-end;
  }
  .home-right { height: 50vh; }
}

/* ========================
   PROJECTS GRID
   ======================== */
.page-header {
  padding: 8rem 0 2rem;
}

.page-header h1 {
  font-weight: 500;
}

.projects-filters {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--black);
  border-bottom-color: var(--black);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.project-card {
  display: block;
}

.project-card-image {
  aspect-ratio: 3/2;
  overflow: hidden;
  margin-bottom: 0.8rem;
  background: var(--gray-100);
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 55%;
  transition: transform 0.6s ease;
  filter: saturate(0.85);
}

.project-card:hover .project-card-image img {
  transform: scale(1.03);
}

.project-card-info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.project-card-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--black);
}

.project-card-location {
  font-size: 0.75rem;
  color: var(--gray-400);
  white-space: nowrap;
}

@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .projects-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ========================
   PROJECT DETAIL
   ======================== */
.project-detail-hero {
  width: 100%;
  height: 85vh;
  min-height: 600px;
  overflow: hidden;
  background: var(--black);
}

.project-detail-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 65%;
  filter: saturate(0.85);
}

.project-detail-header {
  padding: 3rem 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.project-detail-header h1 {
  font-weight: 400;
}

.project-subtitle {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.project-card-title em {
  font-style: normal;
  color: var(--gray-400);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  margin-left: 0.3rem;
}

.project-meta {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.project-meta-item {
  text-align: left;
}

.project-meta-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
  margin-bottom: 0.2rem;
}

.project-meta-value {
  font-size: 0.9rem;
  color: var(--black);
}

.project-description {
  max-width: 720px;
  padding: 2rem 0 4rem;
}

/* Project tabs (Sobre / Equipe) */
.project-tabs {
  display: flex;
  gap: 2.5rem;
  padding-bottom: 1.5rem;
  margin: 1rem 0 2.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.project-tab {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  background: none;
  border: none;
  padding: 0.3rem 0;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  margin-bottom: -1.7rem;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.project-tab:hover,
.project-tab.active {
  color: var(--black);
  border-bottom-color: var(--black);
}

.project-tab-content {
  display: none;
}

.project-tab-content.active {
  display: block;
}

/* Project team credits */
.project-team {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 3rem;
  max-width: 720px;
  padding: 1rem 0 3rem;
}

.project-team-item {
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 1rem;
}

.project-team-role {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
  margin-bottom: 0.3rem;
  display: block;
}

.project-team-name {
  font-size: 0.95rem;
  color: var(--black);
}

@media (max-width: 640px) {
  .project-team { grid-template-columns: 1fr; }
}

.project-description p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gray-700);
}

.project-description p + p { margin-top: 1.5rem; }

.project-gallery {
  columns: 2;
  column-gap: 1rem;
  padding-bottom: 4rem;
}

.project-gallery img {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 1rem;
  break-inside: avoid;
  filter: saturate(0.85);
}

@media (max-width: 640px) {
  .project-gallery { columns: 1; }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 1rem;
  transition: color var(--transition);
}

.back-link:hover { color: var(--black); opacity: 1; }

.back-link svg { width: 14px; height: 14px; }

/* ========================
   ABOUT
   ======================== */
.about-hero {
  width: 100%;
  height: 60vh;
  overflow: hidden;
}

.about-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
}

.about-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.about-content h2 {
  margin-bottom: 2rem;
}

.about-content p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gray-700);
}

.about-content p + p { margin-top: 1.5rem; }

.team-section {
  padding: 4rem 0;
  border-top: 1px solid var(--gray-200);
}

.team-sector {
  margin-top: 4rem;
}

.team-sector:first-of-type {
  margin-top: 3rem;
}

.team-sector-title {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--gray-200);
}

.team-founder {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.team-founder .team-card {
  /* Titular ocupa 1 coluna em desktop (mesmo tamanho dos outros) */
  grid-column: span 1;
}

.team-founder .team-card-image {
  aspect-ratio: 3/4;
}

@media (max-width: 1024px) {
  .team-founder { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .team-founder { grid-template-columns: 1fr; max-width: 320px; }
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.team-card-image {
  aspect-ratio: 3/4;
  overflow: hidden;
  margin-bottom: 0.8rem;
  background: var(--gray-100);
}

.team-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(0.9);
  transition: filter var(--transition);
}

.team-card:hover .team-card-image img {
  filter: grayscale(0%) contrast(1);
}

.team-card-name {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.team-card-role {
  font-size: 0.75rem;
  color: var(--gray-400);
}

@media (max-width: 1024px) {
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .team-grid { grid-template-columns: 1fr; max-width: 320px; }
}

/* ========================
   CONTACT
   ======================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 80px);
}

.contact-left {
  padding: 8rem 4rem 4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-right {
  background: var(--black);
  color: var(--white);
  padding: 8rem 4rem 4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-info-item {
  margin-bottom: 2.5rem;
}

.contact-info-item .label {
  color: var(--gray-400);
  margin-bottom: 0.5rem;
  display: block;
}

.contact-info-item p,
.contact-info-item a {
  color: var(--gray-300);
  font-size: 0.95rem;
  line-height: 1.7;
}

.contact-info-item a:hover { color: var(--white); opacity: 1; }

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 0;
  border: none;
  border-bottom: 1px solid var(--gray-200);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--black);
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-bottom-color: var(--black);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
  border: 1px solid var(--gray-200);
  padding: 0.8rem;
  margin-top: 0.3rem;
}

.form-group textarea:focus {
  border-color: var(--black);
}

.btn-submit {
  display: inline-block;
  padding: 0.8rem 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--black);
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 1rem;
}

.btn-submit:hover {
  background: transparent;
  color: var(--black);
}

@media (max-width: 768px) {
  .contact-layout { grid-template-columns: 1fr; }
  .contact-left { padding: 8rem 1.5rem 3rem; }
  .contact-right { padding: 3rem 1.5rem; }
}

/* ========================
   FOOTER
   ======================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--gray-200);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--gray-400);
  letter-spacing: 0.04em;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  font-size: 0.7rem;
  color: var(--gray-400);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--black); opacity: 1; }

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ========================
   SCROLL REVEAL
   ======================== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ========================
   WHATSAPP FLOAT
   ======================== */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
  transition: transform var(--transition);
}

.whatsapp-float:hover { transform: scale(1.08); opacity: 1; }
.whatsapp-float svg { width: 22px; height: 22px; fill: var(--white); }

/* ========================
   UTILITIES
   ======================== */
.separator {
  width: 100%;
  height: 1px;
  background: var(--gray-200);
}

.section-spacer { padding: 5rem 0; }

@media (max-width: 768px) {
  .section-spacer { padding: 3rem 0; }
}