:root {
  --navy: #263959;
  --orange: #f38d33;
  --white: #ffffff;
  --gray-light: #f5f5f5;
  --gray-dark: #333333;

  --navy-tint-1: #3a5079;
  --navy-tint-2: #4d6aa0;
  --orange-tint-1: #f7ac6a;

  --bg-deep: #0a0e1a;
  --bg-panel: #131a2c;
  --bg-panel-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f4f6fb;
  --text-muted: rgba(244, 246, 251, 0.66);

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Lato', sans-serif;
  --font-hero: 'Montserrat', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background:
    radial-gradient(ellipse 900px 520px at 88% 6%, rgba(243, 141, 51, 0.10), transparent 60%),
    radial-gradient(ellipse 800px 600px at 8% 42%, rgba(77, 106, 160, 0.16), transparent 60%),
    radial-gradient(ellipse 700px 520px at 75% 94%, rgba(243, 141, 51, 0.07), transparent 60%),
    var(--bg-deep);
  background-attachment: fixed;
}

/* ===== Motion: scroll reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== FAIXA: brand-strip (wayfinding de volta ao hub F3Exatas) ===== */
.brand-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px 0;
  font-family: var(--font-heading);
  font-size: 13px;
}

.brand-strip-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

.brand-strip-link:hover {
  color: var(--orange);
}

.brand-strip-current {
  color: var(--text-muted);
  font-weight: 600;
}

/* ===== SEÇÃO 1: hero-banner ===== */
.hero-banner {
  position: relative;
  max-width: 1100px;
  margin: 40px auto;
  min-height: 340px;
  border-radius: 28px;
  background: linear-gradient(100deg, var(--navy) 0%, var(--navy) 30%, var(--navy-tint-2) 55%, var(--orange) 100%);
  display: flex;
  align-items: center;
  padding: 0 90px;
  overflow: hidden;
}

.hero-banner-left {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.hero-logo {
  width: 130px;
  height: 130px;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.35));
}

.hero-wordmark {
  font-family: var(--font-hero);
  font-variant: small-caps;
  letter-spacing: 0.02em;
  font-weight: 800;
  font-size: 32px;
  color: var(--white);
}

.hero-divider {
  width: 1px;
  align-self: stretch;
  margin: 50px 0;
  background: rgba(255, 255, 255, 0.4);
}

.hero-banner-right {
  flex: 1;
  padding-left: 60px;
}

.hero-tagline {
  font-family: var(--font-hero);
  font-variant: small-caps;
  letter-spacing: 0.02em;
  font-weight: 700;
  font-size: 26px;
  line-height: 1.4;
  color: var(--white);
}

.hero-tagline span {
  display: block;
}

/* ===== SEÇÃO: content-section (conteúdo programático) ===== */
.content-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section-heading {
  text-align: center;
  margin-bottom: 40px;
}

.section-kicker {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange);
}

.section-title {
  font-family: var(--font-heading);
  font-variant: small-caps;
  letter-spacing: 0.02em;
  font-weight: 800;
  font-size: 32px;
  color: var(--text-primary);
  margin: 10px 0 12px;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text-muted);
}

.topics-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topic-item {
  border: 1px solid var(--bg-panel-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-panel);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.topic-item:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  border-color: var(--orange);
}

.topic-summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 15px;
}

.topic-summary::-webkit-details-marker {
  display: none;
}

.topic-number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.topic-title {
  flex: 1;
}

.topic-chevron {
  color: var(--orange);
  font-size: 20px;
  transition: transform 0.3s ease;
}

.topic-item[open] .topic-chevron {
  transform: rotate(90deg);
}

.topic-subs {
  list-style: none;
  padding: 4px 20px 18px 62px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-subs li {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.4;
}

.topic-materials-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 4px 20px 18px 62px;
  padding: 12px 16px;
  border-top: 1px solid var(--bg-panel-border);
  padding-top: 14px;
}

.topic-materials-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  color: var(--text-primary);
}

.topic-materials-badge {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--bg-panel-border);
  border-radius: 20px;
  padding: 4px 12px;
  white-space: nowrap;
}

/* ===== SEÇÃO: cta-final ===== */
.cta-final {
  text-align: center;
  background: var(--navy);
  padding: 90px 24px;
}

.cta-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 30px;
  color: var(--white);
  max-width: 640px;
  margin: 0 auto 16px;
}

.cta-subtitle {
  font-family: var(--font-body);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 520px;
  margin: 0 auto 32px;
}

.cta-button {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  text-decoration: none;
  padding: 16px 40px;
  border-radius: 30px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 10px 24px rgba(243, 141, 51, 0.35);
}

.cta-button:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 30px rgba(243, 141, 51, 0.5);
}

/* ===== SEÇÃO: sample-section (amostras do material) ===== */
.sample-section {
  padding: 70px 24px 90px;
}

.sample-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.sample-card {
  flex: 1;
  min-width: 320px;
  max-width: 460px;
  border: 3px solid var(--navy-tint-1);
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-panel);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.3);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.sample-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 44px rgba(38, 57, 89, 0.2);
}

.sample-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.sample-caption {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  text-align: center;
  padding: 14px;
}

/* ===== SEÇÃO: faq-section ===== */
.faq-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 70px 24px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--bg-panel-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-panel);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  border-color: var(--orange);
}

.faq-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 15px;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  color: var(--orange);
  font-size: 20px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(90deg);
}

.faq-answer {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 0 20px 18px;
}

/* ===== SEÇÃO: why-choose (badges conectados por linha) ===== */
.why-choose {
  max-width: 1000px;
  margin: 0 auto;
  padding: 80px 24px;
}

.why-steps {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  position: relative;
  padding-top: 12px;
}

.why-steps::before {
  content: "";
  position: absolute;
  top: 54px;
  left: 10%;
  right: 10%;
  height: 0;
  border-top: 2px dashed var(--orange-tint-1);
  z-index: 0;
}

.why-step {
  flex: 1;
  min-width: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.why-badge {
  width: 84px;
  height: 84px;
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.35);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.why-badge svg { width: 32px; height: 32px; }

.why-badge-navy { background: var(--navy); }
.why-badge-orange { background: var(--orange); }

.why-step:hover .why-badge {
  transform: translateY(-6px) scale(1.06);
  box-shadow: 0 18px 30px rgba(0, 0, 0, 0.45);
}

.why-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-primary);
  max-width: 160px;
}

/* ===== RODAPÉ ===== */
.site-footer {
  --footer-pad-x: 24px;
  background: var(--navy);
  padding: 70px 0 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 50px;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--footer-pad-x);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 200px;
}

.footer-brand {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 22px;
  color: var(--orange);
  margin-bottom: 6px;
}

.footer-desc {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.5;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.footer-social-btn {
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 20px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.footer-social-btn:hover {
  border-color: var(--orange);
  background: rgba(243, 141, 51, 0.15);
}

.footer-heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  color: var(--white);
  margin-bottom: 6px;
}

.footer-link {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--orange);
}

.footer-bottom {
  width: 100%;
  text-align: center;
  margin-top: 20px;
  padding: 30px var(--footer-pad-x);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-legal-links {
  width: 100%;
  text-align: center;
  padding: 0 var(--footer-pad-x) 24px;
  background: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 12.5px;
}

.footer-legal-links a { color: rgba(255, 255, 255, 0.5); text-decoration: none; }
.footer-legal-links a:hover { color: var(--orange); }

/* ===== SEÇÃO 3: cards-showcase ===== */
.cards-showcase {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 60px 24px 100px;
  flex-wrap: wrap;
}

.phone-card {
  width: 220px;
  height: 420px;
  border-radius: 32px;
  position: relative;
  padding: 40px 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.phone-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 28px 50px rgba(0, 0, 0, 0.22);
}

.phone-navy { background: var(--navy); }
.phone-blue { background: var(--navy-tint-2); }
.phone-orange { background: var(--orange); }

.phone-notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.35);
}

.phone-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
}

.phone-content-center {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.phone-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 19px;
  color: var(--white);
  line-height: 1.3;
}

.phone-subtitle {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.phone-icon {
  color: var(--white);
}

.phone-icon svg {
  width: 40px;
  height: 40px;
}

/* ===== RESPONSIVO (celular) ===== */
@media (max-width: 640px) {
  .hero-banner {
    flex-direction: column;
    min-height: auto;
    margin: 20px auto;
    padding: 36px 20px;
    gap: 20px;
  }

  .hero-banner-left { flex: none; width: 100%; gap: 10px; }
  .hero-logo { width: 90px; height: 90px; }
  .hero-wordmark { font-size: 22px; }

  .hero-divider {
    width: 70%;
    height: 1px;
    align-self: center;
    margin: 0;
  }

  .hero-banner-right { flex: none; width: 100%; padding-left: 0; text-align: center; }
  .hero-tagline { font-size: 19px; }
  .hero-tagline span { display: inline; }

  .section-title { font-size: 24px; }
  .section-subtitle { font-size: 14px; }

  .content-section,
  .sample-section,
  .why-choose,
  .faq-section {
    padding: 50px 20px;
  }

  .topic-subs { padding-left: 44px; }

  .why-steps {
    flex-direction: column;
    align-items: center;
    gap: 28px;
  }

  .why-steps::before { display: none; }

  .cards-showcase {
    flex-direction: column;
    align-items: center;
    padding: 40px 20px 70px;
    gap: 20px;
  }

  .phone-card {
    width: 100%;
    max-width: 320px;
    height: auto;
    min-height: 240px;
    padding: 28px 22px;
  }

  .phone-title { font-size: 18px; }

  .sample-card { min-width: 100%; }

  .cta-final { padding: 60px 20px; }
  .cta-title { font-size: 24px; }
  .cta-subtitle { font-size: 14px; }

  .site-footer { --footer-pad-x: 20px; padding: 50px var(--footer-pad-x) 0; gap: 32px; }
  .footer-col { min-width: 100%; }
  .footer-desc { max-width: 100%; }
}