/* ==========================================================================
   SEJA CONSTRUTORA — LANDING PAGE
   Paleta: #111111 (preto) · #D6D7D8 (cinza cimento) · #FFFFFF (branco)
   Tipografia: Playfair Display (títulos) · Raleway (textos/botões)
   ========================================================================== */

:root {
  --color-black: #111111;
  --color-gray: #D6D7D8;
  --color-white: #FFFFFF;

  --font-title: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Raleway', sans-serif;

  --container-width: 1200px;
  --section-padding: clamp(4rem, 8vw, 7rem);
  --radius: 2px;

  --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-black);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

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

ul { list-style: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; }

h1, h2, h3 {
  font-family: var(--font-title);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h3 { font-size: 1.25rem; font-weight: 700; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

section { padding-block: var(--section-padding); }

/* ---------- Utility ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6b6b6b;
  margin-bottom: 0.9rem;
}

.section-heading { max-width: 640px; margin-bottom: 3rem; }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-sub { margin-top: 1rem; color: #444; font-size: 1.05rem; }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.95rem 2rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-black);
  color: var(--color-white);
}
.btn-primary:hover { background: #2b2b2b; transform: translateY(-2px); }

.btn-primary-inverse {
  background: var(--color-white);
  color: var(--color-black);
}
.btn-primary-inverse:hover { background: var(--color-gray); transform: translateY(-2px); }

.btn-outline {
  background: transparent;
  color: var(--color-black);
  border-color: var(--color-black);
}
.btn-outline:hover { background: var(--color-black); color: var(--color-white); }

.btn-large { padding: 1.15rem 2.6rem; font-size: 0.9rem; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-block-start: 0.5rem;
}

.section-cta {
  text-align: center;
  margin-block-start: 3rem;
}
.section-cta__text {
  color: #4a4a4a;
  margin-bottom: 1.4rem;
  font-size: 1rem;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
  gap: 1.5rem;
}

.logo img { height: 40px; width: auto; }

.main-nav ul {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  position: relative;
  padding-block: 0.3rem;
}
.nav-link::after {
  content: '';
  position: absolute;
  inset-inline-start: 0;
  inset-block-end: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-black);
  transition: width var(--transition);
}
.nav-link:hover::after { width: 100%; }

.header-cta { margin-inline-start: auto; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: 1100;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-black);
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-active span:nth-child(2) { opacity: 0; }
.hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding-block-start: calc(var(--section-padding) + 4.5rem);
  background: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: 3.5rem;
}

.hero-slogan {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6b6b6b;
  margin-bottom: 1.2rem;
}

.hero-content .hero-sub {
  margin-block: 1.5rem 2.2rem;
  font-size: 1.1rem;
  color: #3a3a3a;
  max-width: 480px;
}

/* ---------- Image placeholders ---------- */
.img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--color-gray);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}
.img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 48%, rgba(17,17,17,0.08) 49%, rgba(17,17,17,0.08) 51%, transparent 52%);
}
.img-placeholder--tall { aspect-ratio: 3 / 4; }

/* ---------- Real media (photos/videos) ---------- */
.media-frame {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  background: var(--color-black);
}
.media-frame--tall { aspect-ratio: 3 / 4; }

.hero-logo-frame {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-gray);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}
.hero-logo-img {
  width: 100%;
  max-width: 260px;
  height: auto;
}

.img-placeholder__label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #575757;
  position: relative;
  z-index: 1;
}

/* ---------- Stats bar ---------- */
.stats-bar {
  background: var(--color-black);
  color: var(--color-white);
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat { display: flex; flex-direction: column; gap: 0.4rem; }
.stat__value {
  font-family: var(--font-title);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
}
.stat__label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #cfcfcf;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3.5rem;
  align-items: center;
}
.about-content h2 { margin-bottom: 1.3rem; }
.about-content p { color: #3a3a3a; margin-bottom: 1.1rem; max-width: 560px; }
.about-content .btn { margin-top: 0.8rem; }

/* ---------- Antes e Depois ---------- */
.before-after-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.before-after-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}
.before-after-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}
.before-after-item:hover img { transform: scale(1.04); }
.before-after-item figcaption {
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 0;
  padding: 0.6rem 1.15rem;
  background: rgba(17, 17, 17, 0.75);
  color: var(--color-white);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- Services ---------- */
.services { background: var(--color-gray); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: var(--color-white);
  padding: 2.4rem 2rem;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px rgba(17, 17, 17, 0.08);
}
.service-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.4rem;
  color: var(--color-black);
}
.service-card__icon svg { width: 100%; height: 100%; }
.service-card h3 { margin-bottom: 0.7rem; }
.service-card p { color: #4a4a4a; font-size: 0.96rem; }

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.project-item figcaption {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #333;
}

/* ---------- Testimonials ---------- */
.testimonials { background: var(--color-gray); }

.testimonial-carousel { max-width: 760px; margin-inline: auto; text-align: center; }

.testimonial-track {
  position: relative;
  min-height: 220px;
}

.testimonial-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0.5s;
}
.testimonial-slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  position: relative;
}

.testimonial-quote {
  font-family: var(--font-title);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-style: italic;
  line-height: 1.5;
  margin-bottom: 1.6rem;
}
.testimonial-name { font-weight: 700; letter-spacing: 0.03em; }
.testimonial-role {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5c5c5c;
  margin-top: 0.2rem;
}

.testimonial-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}
.testimonial-arrow {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.testimonial-arrow:hover { background: var(--color-black); color: var(--color-white); }
.testimonial-arrow svg { width: 18px; height: 18px; }

.testimonial-dots { display: flex; gap: 0.6rem; }
.testimonial-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9d9d9d;
  transition: background var(--transition), transform var(--transition);
}
.testimonial-dot.is-active { background: var(--color-black); transform: scale(1.3); }

/* ---------- FAQ ---------- */
.faq { background: var(--color-white); }

.faq-list {
  max-width: 760px;
  margin-inline: auto;
}

.faq-item {
  border-bottom: 1px solid rgba(17, 17, 17, 0.1);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.3rem 2.5rem 1.3rem 0;
  font-weight: 700;
  font-size: 1.02rem;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  position: absolute;
  inset-inline-end: 0.2rem;
  inset-block-start: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: #6b6b6b;
  transition: transform var(--transition);
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  padding: 0 2.5rem 1.4rem 0;
  color: #4a4a4a;
  font-size: 0.98rem;
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: var(--color-black);
  color: var(--color-white);
  text-align: center;
}
.final-cta__inner { max-width: 700px; margin-inline: auto; }
.final-cta h2 { margin-bottom: 1.2rem; }
.final-cta p { color: #d4d4d4; margin-bottom: 2.2rem; font-size: 1.05rem; }
.final-cta__phone { margin-block-start: 1.8rem; margin-bottom: 0 !important; font-size: 0.95rem !important; }
.final-cta__phone a { color: var(--color-white); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-black);
  color: #d4d4d4;
  padding-block-start: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.footer-logo { height: 34px; width: auto; margin-bottom: 1.2rem; filter: invert(1) brightness(2); }
.footer-brand p { font-size: 0.9rem; margin-bottom: 0.5rem; line-height: 1.7; }
.footer-brand a:hover { color: var(--color-white); }

.footer-links h3, .footer-social h3 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 1.2rem;
}
.footer-links ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-links a { font-size: 0.9rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-white); }

.social-icons { display: flex; gap: 0.9rem; }
.social-icons a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}
.social-icons a:hover { background: var(--color-white); color: var(--color-black); border-color: var(--color-white); }
.social-icons svg { width: 18px; height: 18px; }

.footer-bottom {
  padding-block: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: #9d9d9d;
}

/* ---------- WhatsApp float button ---------- */
.whatsapp-float {
  position: fixed;
  inset-block-end: 1.75rem;
  inset-inline-end: 1.75rem;
  width: 60px;
  height: 60px;
  background: #111111;
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.35);
  z-index: 999;
  animation: pulse 2.4s infinite;
}
.whatsapp-float svg { width: 30px; height: 30px; }
.whatsapp-float:hover { animation-play-state: paused; transform: scale(1.06); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(17, 17, 17, 0.35), 0 8px 24px rgba(17, 17, 17, 0.35); }
  70% { box-shadow: 0 0 0 14px rgba(17, 17, 17, 0), 0 8px 24px rgba(17, 17, 17, 0.35); }
  100% { box-shadow: 0 0 0 0 rgba(17, 17, 17, 0), 0 8px 24px rgba(17, 17, 17, 0.35); }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    inset-block-start: 0;
    inset-inline-end: 0;
    inset-block-end: 0;
    width: min(78vw, 320px);
    background: var(--color-white);
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform var(--transition);
    padding: 6.5rem 2rem 2rem;
    z-index: 1050;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 1.6rem; }
  .nav-link { font-size: 0.95rem; }

  .header-cta { display: none; }
  .hamburger { display: flex; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-media { order: -1; }

  .about-grid { grid-template-columns: 1fr; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
  .stats-grid .stat:last-child:nth-child(odd) { grid-column: 1 / -1; }

  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .before-after-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .whatsapp-float { width: 54px; height: 54px; inset-block-end: 1.25rem; inset-inline-end: 1.25rem; }
  .btn-large { width: 100%; }
}

/* Mobile nav backdrop */
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(17, 17, 17, 0.4);
  z-index: 1040;
}
.nav-backdrop.is-open { display: block; }