:root {
  --teal-dark: #4A7B82;
  --teal: #62959C;
  --teal-light: #5EAAA8;
  --blue-grey: #719FB0;
  --gold: #F6C065;
  --gold-dark: #B87A1C;
  --ink: #1E2B2D;
  --ink-soft: #4A5B5E;
  --paper: #FFFFFF;
  --paper-soft: #F4F8F8;
  --border: rgba(30,43,45,0.10);
  --max-width: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: -0.01em;
}

a { color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

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

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-dark);
  margin-bottom: 12px;
}
.eyebrow.gold { color: var(--gold-dark); }

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand img { height: 34px; width: auto; }

.nav-links {
  display: flex;
  gap: 26px;
  font-size: 14px;
  font-weight: 500;
}

.nav-links a { text-decoration: none; color: var(--ink-soft); padding-bottom: 2px; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--teal-dark); }
.nav-links a.active { color: var(--teal-dark); border-bottom-color: var(--teal); }

.nav-cta {
  background: var(--teal);
  color: var(--paper);
  padding: 10px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--teal-dark); }

/* Hero (home) — foto de fundo (energia a partir da natureza) + overlay de marca */
.hero {
  position: relative;
  padding: 128px 0 96px;
  text-align: center;
  background-image:
    linear-gradient(135deg, rgba(20, 36, 38, 0.90) 0%, rgba(74, 123, 130, 0.78) 55%, rgba(94, 170, 168, 0.55) 100%),
    url('../fotos/hero-natureza.jpg');
  background-size: cover;
  background-position: center 40%;
  background-repeat: no-repeat;
  isolation: isolate;
}

.hero-inner { max-width: 760px; margin: 0 auto; }

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

.hero h1 {
  font-size: clamp(32px, 4.6vw, 48px);
  margin-bottom: 20px;
  color: #FFFFFF;
  text-shadow: 0 2px 18px rgba(0,0,0,0.25);
}

.hero h1 em { font-style: normal; color: var(--gold); }

.hero p.lead {
  font-size: 18px;
  color: rgba(255,255,255,0.92);
  max-width: 62ch;
  margin: 0 auto 32px;
}

.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

.hero .btn-secondary { border-color: rgba(255,255,255,0.7); color: #FFFFFF; }
.hero .btn-secondary:hover { background: rgba(255,255,255,0.12); }

.trust-line {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.25);
  font-size: 13.5px;
  color: rgba(255,255,255,0.85);
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.trust-line span:not(.dot) { white-space: nowrap; }
.trust-line .dot { color: rgba(255,255,255,0.4); }

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
}

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

.btn-secondary { border-color: var(--teal); color: var(--teal-dark); }
.btn-secondary:hover { background: var(--paper-soft); }

.btn-small { padding: 9px 18px; font-size: 13.5px; }

/* Sections */
section { padding: 88px 0; }
section.alt { background: var(--paper-soft); }
section.tight { padding: 56px 0; }

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { max-width: 620px; margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.2vw, 34px); margin-bottom: 14px; }
.section-head p { color: var(--ink-soft); font-size: 16px; }

/* Pillars (home — NProtex / NSelect teaser blocks, stacked like nanotex.com) */
.pillars { display: flex; flex-direction: column; gap: 88px; }

.pillar {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: center;
}
.pillar.reverse { grid-template-columns: 1.15fr 0.85fr; }
.pillar.reverse .pillar-media { order: 2; }
.pillar.reverse .pillar-content { order: 1; }

.pillar-media {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--paper-soft);
}
.pillar-media img { width: 100%; height: 100%; object-fit: cover; }

.pillar-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.pillar.nprotex .pillar-tag { background: rgba(246,192,101,0.28); color: var(--gold-dark); }
.pillar.nselect .pillar-tag { background: rgba(94,170,168,0.20); color: var(--teal-dark); }

.pillar-content h3 { font-size: clamp(24px, 2.8vw, 30px); margin-bottom: 6px; }
.pillar-content .subtitle { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 16px; font-style: italic; }
.pillar-content p.desc { color: var(--ink-soft); margin-bottom: 20px; }

.pillar-content ul { display: flex; flex-direction: column; gap: 9px; margin-bottom: 26px; }
.pillar-content li {
  font-size: 14.5px;
  padding-left: 22px;
  position: relative;
  color: var(--ink);
}
.pillar-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal-light);
}
.pillar.nprotex li::before { background: var(--gold); }

/* Application / feature tag chips */
.app-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.app-tags span {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--ink-soft);
}

/* Storytelling (origem) */
.story {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 56px;
  align-items: center;
}
.story-media {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border);
}
.story-media img { width: 100%; height: 100%; object-fit: cover; }
.story-content p { color: var(--ink-soft); margin-bottom: 14px; }
.story-content p:last-child { margin-bottom: 0; }

/* Science facts */
.science-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.science-photo { border-radius: 16px; overflow: hidden; border: 1px solid var(--border); }
.science-photo img { width: 100%; height: 320px; object-fit: cover; }

.fact-list { display: flex; flex-direction: column; gap: 18px; }
.fact { display: flex; gap: 14px; align-items: flex-start; }
.fact-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--teal); margin-top: 7px; flex-shrink: 0; }
.fact strong { display: block; margin-bottom: 2px; }
.fact span { color: var(--ink-soft); font-size: 14.5px; }

/* Stat cards (subpage "problema") */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.stat-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  background: var(--paper-soft);
}
.stat-card .number { font-size: 30px; font-weight: 700; color: var(--teal-dark); margin-bottom: 6px; }
.stat-card .label { font-size: 14px; color: var(--ink-soft); }

/* Applications cards (subpages) */
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.app-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  background: var(--paper);
}
.app-card h4 { font-size: 16px; margin-bottom: 8px; }
.app-card p { font-size: 14px; color: var(--ink-soft); }

/* Comparison table (diferenciais frente ao mercado) */
.compare-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 16px; }
.compare-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: left; font-size: 14.5px; }
.compare-table thead th {
  background: var(--paper-soft);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 700;
  color: var(--ink);
  font-size: 13.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.compare-table thead th.us { color: var(--teal-dark); }
.compare-table tbody tr { border-top: 1px solid var(--border); }
.compare-table tbody td:first-child { color: var(--ink-soft); font-weight: 600; }
.compare-table tbody td.us { color: var(--ink); font-weight: 600; background: rgba(94,170,168,0.08); }
.compare-note { font-size: 12.5px; color: var(--ink-soft); margin-top: 10px; }

/* Media block (subpage photo with caption) */
.media-block { border-radius: 16px; overflow: hidden; border: 1px solid var(--border); }
.media-block img { width: 100%; height: 340px; object-fit: cover; }
.media-caption { font-size: 13px; color: var(--ink-soft); margin-top: 10px; }

/* Timeline (origem, home) */
.timeline { display: flex; flex-direction: column; gap: 28px; margin-top: 32px; }
.timeline-item { display: grid; grid-template-columns: 90px 1fr; gap: 20px; }
.timeline-year { font-weight: 700; color: var(--teal-dark); font-size: 18px; }
.timeline-item p { color: var(--ink-soft); }
.timeline-item h4 { margin-bottom: 6px; font-size: 17px; }

/* Team */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.team-card { text-align: center; }
.avatar {
  width: 112px; height: 112px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 1px var(--border);
  background: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar.initials { font-size: 32px; font-weight: 700; color: var(--paper); }
.team-card h4 { font-size: 16px; margin-bottom: 2px; }
.team-card .role { font-size: 13px; color: var(--teal-dark); font-weight: 600; margin-bottom: 8px; }
.team-card .bio { font-size: 13.5px; color: var(--ink-soft); }

/* Partners */
.partners-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: center; }
.partner-logo {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 84px;
}
.partner-logo img { max-height: 46px; max-width: 100%; width: auto; filter: grayscale(15%); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-list { display: flex; flex-direction: column; gap: 18px; margin-top: 24px; }
.contact-list a { text-decoration: none; font-weight: 600; color: var(--teal-dark); }
.contact-list .label { font-size: 13px; color: var(--ink-soft); display: block; margin-bottom: 2px; }

.guardrail {
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--paper-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  background: var(--paper);
}
.faq-item h3 { font-size: 16.5px; margin-bottom: 8px; }
.faq-item p { font-size: 14.5px; color: var(--ink-soft); }

/* CTA banner (subpages) */
.cta-banner {
  border-radius: 20px;
  padding: 44px;
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
  color: var(--paper);
  text-align: center;
}
.cta-banner h2 { color: var(--paper); margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.86); max-width: 56ch; margin: 0 auto 26px; }
.cta-banner .btn-primary { background: var(--paper); color: var(--teal-dark); }
.cta-banner .btn-primary:hover { background: var(--paper-soft); }
.cta-banner .btn-secondary { border-color: rgba(255,255,255,0.6); color: var(--paper); }
.cta-banner .btn-secondary:hover { background: rgba(255,255,255,0.1); }

/* Tech subpage hero */
.tech-hero { padding: 64px 0 60px; }
.tech-hero-inner { max-width: 780px; }
.tech-hero h1 { font-size: clamp(30px, 4vw, 42px); margin-bottom: 18px; }
.tech-hero p.lead { font-size: 17px; color: var(--ink-soft); max-width: 60ch; margin-bottom: 28px; }
.tech-hero.nprotex { background: linear-gradient(160deg, #FBF3E4 0%, var(--paper) 55%); }
.tech-hero.nselect { background: linear-gradient(160deg, #EFF6F5 0%, var(--paper) 55%); }

.breadcrumb { font-size: 13px; color: var(--ink-soft); margin-bottom: 18px; }
.breadcrumb a { color: var(--teal-dark); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* Footer */
footer {
  background: var(--ink);
  color: rgba(255,255,255,0.72);
  padding: 40px 0 28px;
  font-size: 13.5px;
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
footer .brand-foot { display: flex; align-items: center; gap: 10px; color: var(--paper); font-weight: 600; }
footer a { color: rgba(255,255,255,0.72); text-decoration: none; }
footer a:hover { color: var(--gold); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .science-grid, .contact-grid, .story, .pillar, .pillar.reverse { grid-template-columns: 1fr; }
  .pillar-media { max-width: 320px; margin: 0 auto; order: 1 !important; }
  .pillar-content { order: 2 !important; }
  .story-media { max-width: 260px; margin: 0 auto; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid, .app-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 70px 1fr; }
  .pillars { gap: 56px; }
}

@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr; }
}