/* ==========================================================================
   Zilium Impermeabilizações — Design System
   ========================================================================== */

:root {
  --color-black: #141414;
  --color-dark: #1c1c1c;
  --color-dark-soft: #262626;
  --color-yellow: #f4c430;
  --color-yellow-dark: #d9a900;
  --color-white: #ffffff;
  --color-off-white: #f7f6f2;
  --color-gray-100: #f1f0ec;
  --color-gray-300: #d8d6cf;
  --color-gray-600: #6b6a63;
  --color-gray-800: #35342f;

  --font-heading: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container-width: 1180px;
  --radius: 6px;
  --shadow-card: 0 10px 30px rgba(20, 20, 20, 0.08);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-dark);
  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;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.6rem); }

p { color: var(--color-gray-800); }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
}

.section--tight { padding: 56px 0; }

.section--dark {
  background: var(--color-black);
  color: var(--color-white);
}

.section--dark p { color: var(--color-gray-300); }

.section--off {
  background: var(--color-off-white);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-yellow-dark);
  margin-bottom: 12px;
}

.section--dark .eyebrow { color: var(--color-yellow); }

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
  padding: 14px 30px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--color-yellow);
  color: var(--color-black);
}

.btn--primary:hover { background: var(--color-yellow-dark); }

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

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

.btn--dark {
  background: var(--color-black);
  color: var(--color-white);
}

.btn--dark:hover { background: var(--color-dark-soft); }

/* ---------------- Top bar ---------------- */

.topbar {
  background: var(--color-yellow);
  color: var(--color-black);
  font-size: 0.85rem;
  font-weight: 600;
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
}

.topbar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.topbar .topbar-cta {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: auto;
}

/* ---------------- Header / Nav ---------------- */

.header {
  background: var(--color-black);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-white);
}

.logo-header-img {
  height: 48px;
  width: auto;
  flex-shrink: 0;
}

.logo-full-img {
  height: 110px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  color: var(--color-white);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 10px 16px;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--color-yellow);
  background: rgba(244, 196, 48, 0.08);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.6rem;
  cursor: pointer;
}

@media (max-width: 960px) {
  .nav-toggle { display: block; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-black);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .nav.open { max-height: 500px; }

  .nav a {
    padding: 14px 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  .header { position: relative; }

  .topbar .container { justify-content: center; text-align: center; }
  .topbar .topbar-cta { margin-right: 0; width: 100%; text-align: center; }
}

/* ---------------- Hero ---------------- */

.hero {
  position: relative;
  color: var(--color-white);
  background: var(--color-black);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(20,20,20,0.96) 30%, rgba(20,20,20,0.55) 100%);
}

.hero-content {
  position: relative;
  padding: 130px 0 110px;
  max-width: 760px;
}

.hero-content .eyebrow { color: var(--color-yellow); }

.hero-content h1 {
  margin-bottom: 22px;
}

.hero-content h1 mark {
  background: var(--color-yellow);
  color: var(--color-black);
  padding: 0 8px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero-content p {
  color: var(--color-gray-300);
  font-size: 1.1rem;
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.page-hero {
  position: relative;
  color: var(--color-white);
  background: var(--color-black);
}

.page-hero .hero-content { padding: 90px 0 70px; max-width: 680px; }

/* ---------------- Grids & Cards ---------------- */

.grid {
  display: grid;
  gap: 28px;
}

.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(20,20,20,0.14);
}

.card-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.card:hover .card-media img { transform: scale(1.06); }

.card-body {
  padding: 22px 24px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-body .tag {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-yellow-dark);
  margin-bottom: 8px;
}

.card-body h3 { margin-bottom: 10px; font-size: 1.2rem; }

.card-body p { font-size: 0.95rem; margin-bottom: 16px; }

.card-link {
  margin-top: auto;
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-black);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link::after { content: "→"; transition: transform var(--transition); }
.card-link:hover::after { transform: translateX(4px); }

/* Icon feature list */

.feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-yellow);
  color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
}

.feature h4 { font-size: 1.05rem; margin-bottom: 6px; text-transform: none; }
.feature p { font-size: 0.94rem; }

/* Numbered process steps */

.steps {
  counter-reset: step;
  display: grid;
  gap: 20px;
}

.steps--grid2 {
  grid-template-columns: repeat(2, 1fr);
  column-gap: 48px;
}

@media (max-width: 620px) {
  .steps--grid2 { grid-template-columns: 1fr; }
}

.step {
  position: relative;
  padding-left: 60px;
  counter-increment: step;
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-black);
  color: var(--color-yellow);
  font-family: var(--font-heading);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h4 { text-transform: none; font-size: 1.05rem; margin-bottom: 4px; }
.step p { font-size: 0.94rem; }

/* ---------------- Stats ---------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.stats--3 { grid-template-columns: repeat(3, 1fr); max-width: 720px; margin: 0 auto; }
@media (max-width: 700px) { .stats--3 { grid-template-columns: 1fr; } }

.stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.4rem;
  color: var(--color-yellow);
}

.stat span {
  font-size: 0.85rem;
  color: var(--color-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------------- Before / After ---------------- */

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  border-radius: var(--radius);
  overflow: hidden;
}

.compare > div { position: relative; aspect-ratio: 4/3; overflow:hidden; }
.compare img { width: 100%; height: 100%; object-fit: cover; }
.compare span {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(20,20,20,0.75);
  color: var(--color-white);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 4px;
}

@media (max-width: 560px) { .compare { grid-template-columns: 1fr; } }

/* ---------------- Forms ---------------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-grid .full { grid-column: 1 / -1; }

@media (max-width: 620px) { .form-grid { grid-template-columns: 1fr; } }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-gray-800);
}

input, textarea, select {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-white);
  color: var(--color-dark);
  transition: border-color var(--transition);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-yellow-dark);
}

textarea { resize: vertical; min-height: 130px; }

.form-note {
  font-size: 0.82rem;
  color: var(--color-gray-600);
  margin-top: 10px;
}

.form-status {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
}

.form-status.success { background: #e7f6ea; color: #1e7a34; }
.form-status.error { background: #fdeceb; color: #b3261e; }

/* ---------------- Contact info blocks ---------------- */

.contact-info {
  display: grid;
  gap: 20px;
}

.contact-info .feature-icon { background: var(--color-black); color: var(--color-yellow); }

/* ---------------- CTA band ---------------- */

.cta-band {
  background: var(--color-yellow);
  color: var(--color-black);
}

.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 48px;
  padding-bottom: 48px;
}

.cta-band h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }

/* ---------------- Footer ---------------- */

.footer {
  background: var(--color-black);
  color: var(--color-gray-300);
  padding: 64px 0 28px;
}

.footer .grid--4 { margin-bottom: 48px; }

.footer h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer ul li { margin-bottom: 10px; font-size: 0.92rem; }
.footer ul li a:hover { color: var(--color-yellow); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--color-gray-600);
}

.social-row {
  display: flex;
  gap: 10px;
}

.social-row a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-300);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.social-row a svg { display: block; }

.social-row a:hover {
  background: var(--color-yellow);
  border-color: var(--color-yellow);
  color: var(--color-black);
}

/* ---------------- Blog post ---------------- */

.post-meta {
  font-size: 0.85rem;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.post-body {
  max-width: 760px;
  font-size: 1.05rem;
}

.post-body p { margin-bottom: 20px; }
.post-body h2, .post-body h3 { margin: 32px 0 16px; }

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-gray-300);
  margin-bottom: 18px;
}

.breadcrumb a:hover { color: var(--color-yellow); }

/* ---------------- Nav CTA ---------------- */

.nav-cta {
  background: var(--color-yellow) !important;
  color: var(--color-black) !important;
  margin-left: 8px;
}

.nav-cta:hover { background: var(--color-yellow-dark) !important; }

@media (max-width: 960px) {
  .nav-cta { margin: 14px 24px; text-align: center; border-radius: var(--radius); }
}

/* ---------------- Solution cards ---------------- */

.solution-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}

.solution-card .tag { margin-bottom: 10px; }
.solution-card h3 { margin-bottom: 12px; }
.solution-card p { font-size: 0.95rem; margin-bottom: 16px; }

.solution-badges {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.solution-badges span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-gray-800);
  display: flex;
  align-items: center;
  gap: 8px;
}

.solution-badges span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-yellow-dark);
  flex-shrink: 0;
}

/* ---------------- Structure cards ---------------- */

.structure-card {
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  padding: 26px 24px;
  background: var(--color-white);
}

.structure-card h4 { font-size: 1.05rem; text-transform: none; margin-bottom: 8px; }
.structure-card p { font-size: 0.92rem; margin-bottom: 0; }

/* ---------------- Big stat band ---------------- */

.stat-band {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-band .stat-figure {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 5rem);
  color: var(--color-yellow);
  line-height: 1;
  flex-shrink: 0;
}

.stat-band .stat-figure + p {
  color: var(--color-gray-300);
  max-width: 260px;
  font-size: 0.95rem;
}

/* ---------------- ZILIUM letters ---------------- */

.zilium-letters {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 420px;
  margin: 0 auto;
}

.zilium-letter {
  display: flex;
  align-items: center;
  gap: 16px;
}

.zilium-letter .badge {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-yellow);
  color: var(--color-black);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.zilium-letter h4 {
  text-transform: none;
  font-size: 1.02rem;
  color: var(--color-white);
  margin-bottom: 2px;
}

.zilium-letter p { font-size: 0.88rem; color: var(--color-gray-300); margin: 0; }

.zilium-letter.compact .badge { width: 44px; height: 44px; font-size: 1.3rem; }
.zilium-letter.compact h4 { font-size: 1.1rem; font-weight: 600; }

/* ---------------- Source note / disclaimer ---------------- */

.source-note {
  font-size: 0.78rem;
  color: var(--color-gray-600);
  font-style: italic;
  margin-top: 6px;
}

.section--dark .source-note,
.solution-card .source-note { color: var(--color-gray-300); }

.disclaimer {
  font-size: 0.82rem;
  color: var(--color-gray-600);
  border-left: 3px solid var(--color-gray-300);
  padding-left: 14px;
  margin-top: 16px;
}

/* ---------------- Light stats ---------------- */

.stats--light .stat strong { color: var(--color-yellow-dark); }
.stats--light .stat span { color: var(--color-gray-600); }

/* ---------------- Structure detail blocks ---------------- */

.structure-detail {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-gray-300);
}

.structure-detail:last-child { border-bottom: none; }

.structure-detail h3 { font-size: 1.6rem; text-transform: none; }
.structure-detail .structure-detail-body h4 { text-transform: none; font-size: 1.15rem; margin-bottom: 10px; }
.structure-detail .structure-detail-body p { margin-bottom: 10px; }

@media (max-width: 700px) {
  .structure-detail { grid-template-columns: 1fr; gap: 12px; }
}

/* ---------------- Content bullet list ---------------- */

.check-list {
  display: grid;
  gap: 12px;
  max-width: 560px;
}

.check-list--2col {
  grid-template-columns: repeat(2, 1fr);
  column-gap: 32px;
  max-width: 720px;
}

@media (max-width: 620px) {
  .check-list--2col { grid-template-columns: 1fr; }
}

.check-list li {
  position: relative;
  padding-left: 22px;
  color: var(--color-gray-800);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-yellow-dark);
}

/* ---------------- Client strip ---------------- */

.client-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.client-strip span {
  padding: 10px 18px;
  border: 1px solid var(--color-gray-300);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-gray-800);
}

/* ---------------- Client logos ---------------- */

.client-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.client-logos .logo-tile {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  width: 130px;
  height: 84px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

@media (max-width: 620px) {
  .client-logos { gap: 10px; }
  .client-logos .logo-tile { width: 96px; height: 64px; padding: 10px; }
}

.client-logos .logo-tile:hover {
  border-color: var(--color-yellow-dark);
  box-shadow: var(--shadow-card);
}

.client-logos .logo-tile img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.75;
  transition: filter var(--transition), opacity var(--transition);
}

.client-logos .logo-tile:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ---------------- Obra detail card ---------------- */

.obra-card dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 12px;
  font-size: 0.88rem;
}

.obra-card dt { color: var(--color-gray-600); font-weight: 600; }
.obra-card dd { color: var(--color-gray-800); }

/* ---------------- Utilities ---------------- */

.text-center { text-align: center; }
.mt-lg { margin-top: 48px; }
.mb-0 { margin-bottom: 0 !important; }