/* ===== Design tokens (from Transsidi logo: navy #030e30, brand blue #0076fb, gold #ffb400) ===== */
:root {
  --color-primary: #0076fb;
  --color-primary-dark: #030e30;
  --color-secondary: #4da3ff;
  --color-accent: #ffb400;
  --color-accent-dark: #d69a07;
  --color-accent-strong: #a15b00;
  --color-primary-strong: #0056c7;
  --color-on-accent: #030e30;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-foreground: #0b1a3a;
  --color-muted: #eef1f5;
  --color-border: #e2e8f0;

  --color-dark-bg: #030e30;
  --color-dark-surface: #0d1c42;
  --color-dark-foreground: #e6ecf7;
  --color-dark-muted: #93a7cc;
  --color-dark-border: #1c2d54;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --radius: 10px;
  --container-w: 1160px;
  --transition: 220ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-background);
  color: var(--color-foreground);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.02em;
}

p { margin: 0; }

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

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 20px;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

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

.btn-ghost {
  background: transparent;
  color: var(--color-foreground);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); background: var(--color-muted); }

.btn-lg { padding: 16px 32px; font-size: 16px; }

.icon { width: 20px; height: 20px; flex-shrink: 0; }
.icon-lg { width: 40px; height: 40px; color: var(--color-accent-strong); margin-bottom: var(--space-2); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: 16px;
  padding-bottom: 16px;
}
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logo img {
  height: 48px;
  width: auto;
  border-radius: 6px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex: 1;
  justify-content: center;
}
.main-nav a {
  font-weight: 500;
  font-size: 15px;
  color: var(--color-foreground);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.main-nav a:hover { border-color: var(--color-accent); color: var(--color-accent-strong); }

.header-cta { flex-shrink: 0; border-bottom: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-foreground);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #eef2f7 0%, var(--color-background) 100%);
  padding: var(--space-7) 0 var(--space-6);
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: center;
}
.hero-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 48px -20px rgba(15, 23, 42, 0.35);
  aspect-ratio: 3 / 4;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.eyebrow {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-strong);
  margin-bottom: var(--space-2);
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}
.hero-lead {
  font-size: 18px;
  color: #475569;
  max-width: 560px;
  margin-bottom: var(--space-4);
}
.hero-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--space-5);
  margin: 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.hero-stats dt {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 2.6rem);
  color: var(--color-accent-strong);
  line-height: 1;
}
.hero-stats dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--color-primary-strong);
  font-weight: 600;
}

/* ===== Sections ===== */
.section {
  padding: var(--space-7) 0;
}
.section-dark {
  background: var(--color-dark-bg);
  color: var(--color-dark-foreground);
}
.section-dark .section-lead { color: var(--color-dark-muted); }

.section-tag {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-strong);
  margin-bottom: var(--space-2);
}
.section-dark .section-tag,
.section-cta .section-tag {
  color: var(--color-accent);
}
.section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  max-width: 720px;
  margin-bottom: var(--space-3);
}
.section-dark .section-title { color: #fff; }
.section-lead {
  font-size: 17px;
  color: #475569;
  max-width: 640px;
  margin-bottom: var(--space-5);
}

/* ===== Timeline ===== */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}
.timeline li {
  border-top: 3px solid var(--color-accent);
  padding-top: var(--space-2);
}
.timeline-year {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}
.timeline p { color: #475569; font-size: 15px; }

/* ===== Grids / Cards ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin-bottom: var(--space-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); margin-bottom: var(--space-5); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); margin-bottom: var(--space-4); }

.card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-4px); border-color: var(--color-accent); }
.card-num {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--color-accent);
  font-size: 14px;
  margin-bottom: var(--space-2);
}
.card h3 { font-size: 19px; margin-bottom: 10px; color: #fff; }
.card p { color: var(--color-dark-muted); font-size: 15px; }

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px -12px rgba(30,41,59,0.18); }
.service-card h3 { font-size: 18px; margin-bottom: 8px; color: var(--color-primary-dark); }
.service-card p { color: #475569; font-size: 14.5px; }

.service-card-media {
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  overflow: hidden;
  margin: calc(var(--space-4) * -1) calc(var(--space-4) * -1) var(--space-3);
}
.service-card-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 400ms ease; }
.service-card:hover .service-card-media img { transform: scale(1.06); }
.service-card .icon-lg { margin-top: 0; }

.project-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius);
  padding: var(--space-4);
}
.project-card h3 { font-size: 20px; color: #fff; margin-bottom: 10px; }
.project-card p { color: var(--color-dark-muted); font-size: 15px; }

.project-card-media {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.project-card-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.project-card-body { padding: var(--space-4); }

/* ===== Gallery & Video ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.gallery-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  transition: transform var(--transition);
}
.gallery-grid img:hover { transform: scale(1.02); }

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.video-grid video {
  width: 100%;
  border-radius: var(--radius);
  background: #000;
  aspect-ratio: 9 / 16;
  object-fit: cover;
}

/* ===== Estrutura ===== */
.estrutura-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-5);
  align-items: center;
}
.estrutura-media {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 4;
}
.estrutura-media img { width: 100%; height: 100%; object-fit: cover; }
.estrutura-info .stats-block { grid-template-columns: repeat(3, 1fr); gap: var(--space-3); border-top: none; padding-top: 0; margin-bottom: var(--space-4); }

.values {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.values span {
  border: 1px solid var(--color-dark-border);
  border-radius: 999px;
  padding: 10px 22px;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-accent);
}

.applications-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}
.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-list li {
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  color: var(--color-foreground);
  font-weight: 500;
}

.quote {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 500;
  color: #fff;
  max-width: 760px;
  padding-left: var(--space-3);
  border-left: 4px solid var(--color-accent);
}

.stats-block { border-top: none; padding-top: 0; margin-bottom: var(--space-5); }

.area-box {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  max-width: 640px;
}
.area-box .icon { color: var(--color-accent-strong); margin-top: 3px; }
.area-box p { color: var(--color-foreground); font-size: 15px; }

/* ===== CTA / Contact ===== */
.section-cta {
  background: linear-gradient(160deg, var(--color-primary-dark), #020817);
  color: #fff;
  text-align: center;
}
.section-cta .section-tag { text-align: center; }
.cta-inner { display: flex; flex-direction: column; align-items: center; }
.section-cta .section-title { margin: 0 auto var(--space-5); color: #fff; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  width: 100%;
  margin-bottom: var(--space-5);
}
.contact-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}
.contact-card:not(.contact-card-static):hover { transform: translateY(-4px); background: rgba(255,255,255,0.09); }
.contact-card .icon-lg { color: var(--color-accent); margin: 0 0 var(--space-2); }
.contact-label { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-dark-muted); margin-bottom: 6px; }
.contact-value { font-weight: 600; font-size: 16px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark-bg);
  color: var(--color-dark-muted);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-dark-border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 14px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.footer-brand img { height: 36px; width: auto; border-radius: 4px; }
.footer-inner a:hover { color: var(--color-accent); }

/* ===== WhatsApp floating button ===== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px -4px rgba(0,0,0,0.35);
  z-index: 200;
  transition: transform var(--transition);
}
.whatsapp-float svg { width: 30px; height: 30px; color: #fff; }
.whatsapp-float:hover { transform: scale(1.08); }

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .estrutura-grid { grid-template-columns: 1fr; }
  .estrutura-media { aspect-ratio: 16 / 9; max-width: 560px; margin: 0 auto; }
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .site-header.nav-open .main-nav {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-2) var(--space-3) var(--space-3);
    gap: var(--space-1);
    box-shadow: 0 16px 24px -16px rgba(15, 23, 42, 0.15);
  }
  .site-header.nav-open .main-nav a:not(.header-cta) {
    padding: 12px 4px;
    border-bottom: 1px solid var(--color-border);
  }
  .site-header.nav-open .header-cta {
    justify-content: center;
    margin-top: var(--space-1);
  }
}

@media (max-width: 720px) {
  .grid-3, .grid-2, .timeline { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: var(--space-2); }
  .section { padding: var(--space-6) 0; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-media { order: -1; aspect-ratio: 16 / 10; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .estrutura-info .stats-block { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .estrutura-info .stats-block { grid-template-columns: 1fr; gap: var(--space-2); }
}