/* Kelvin landing — identidade 2025: navy escuro + gradiente térmico do logo */

:root {
  --bg: #050b18;
  --bg-alt: #0a1224;
  --surface: #0e1830;
  --border: #1d2b4a;
  --text: #eaf0f8;
  --text-dim: #93a3bd;
  --primary: #f97316;
  --primary-dark: #ea580c;
  --primary-light: #fb923c;
  --thermal: linear-gradient(90deg, #2563eb, #22c55e, #eab308, #ef4444);
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 11, 24, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-tagline {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  padding-left: 12px;
  border-left: 1px solid var(--border);
  white-space: nowrap;
}
@media (max-width: 1024px) { .nav-tagline { display: none; } }

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--text-dim);
}
.nav-links a:hover { color: var(--text); }

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

/* botão hambúrguer (só aparece no mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 0 9px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.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); }

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-switch button {
  background: none;
  border: none;
  color: var(--text-dim);
  font: inherit;
  font-size: 0.8rem;
  padding: 5px 10px;
  cursor: pointer;
}
.lang-switch button.active {
  background: var(--primary);
  color: #fff;
}

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn:active { transform: translateY(1px); }

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

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary-light); }

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-block { display: block; width: 100%; text-align: center; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 78vh;
  display: flex;
  align-items: center;
  padding: 80px 0;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* scrim para legibilidade do texto: escuro à esquerda, revela o corpo à direita */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(5,11,24,0.96) 0%, rgba(5,11,24,0.82) 38%, rgba(5,11,24,0.35) 70%, rgba(5,11,24,0.15) 100%),
    linear-gradient(0deg, rgba(5,11,24,0.6), transparent 40%);
  pointer-events: none;
}

.hero-inner { position: relative; z-index: 2; width: 100%; }
.hero-copy { max-width: 620px; }

.hero-kicker {
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--text);
  font-size: 1.08rem;
  margin-bottom: 32px;
  text-shadow: 0 1px 20px rgba(5,11,24,0.6);
}

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

/* faixa de números (band própria, abaixo do hero) */
.stats-band {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  padding: 32px 24px;
}

.stat { text-align: center; }
.stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary-light);
}
.stat span { color: var(--text-dim); font-size: 0.88rem; }

/* ---------- Hero Kelvin Engineer (sem vídeo, fundo em CSS) ---------- */
.hero-engineer { min-height: 62vh; background: var(--bg); }
.hero-eng-glow {
  position: absolute;
  inset: -30% -10% auto;
  height: 130%;
  z-index: 0;
  background:
    radial-gradient(ellipse 50% 45% at 78% 25%, rgba(239, 68, 68, 0.20), transparent 60%),
    radial-gradient(ellipse 55% 50% at 90% 40%, rgba(234, 179, 8, 0.16), transparent 62%),
    radial-gradient(ellipse 45% 40% at 65% 15%, rgba(249, 115, 22, 0.16), transparent 60%);
  pointer-events: none;
}
/* grade técnica sutil */
.hero-eng-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 189, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 189, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, transparent, #000 40%, #000 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 40%, #000 100%);
  pointer-events: none;
}

/* ícone das aplicações */
.app-icon {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}
.card h3 + p, .card-body h3 + p { margin-top: 6px; }

/* bloco térmico do "por que" (sem foto) */
.split-thermal {
  min-height: 300px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  padding: 24px;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(255,255,255,0.12), transparent 55%),
    var(--thermal);
}
.split-thermal span {
  font-weight: 700;
  color: #fff;
  background: rgba(5, 11, 24, 0.45);
  padding: 8px 16px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.cards-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ---------- Seções ---------- */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--text-dim);
  max-width: 620px;
  margin-bottom: 40px;
}

/* ---------- Cards de produto ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.cards-4 { grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* header de imagem do card */
.card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-alt);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.card:hover .card-media img { transform: scale(1.04); }

/* header premium: gradiente térmico em vez de foto */
.card-media-premium {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(255,255,255,0.15), transparent 60%),
    var(--thermal);
}
.card-media-premium span {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

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

/* card premium: borda com gradiente térmico */
.card-premium {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    var(--thermal) border-box;
}

.card-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-light);
  background: rgba(249, 115, 22, 0.12);
  padding: 5px 11px;
  border-radius: 999px;
  margin-bottom: 16px;
  min-height: 2.4em;
  display: flex;
  align-items: center;
}

.tag-premium {
  background: rgba(34, 197, 94, 0.12);
  color: #4ade80;
}

.card h3 { font-size: 1.35rem; margin-bottom: 10px; }
.accent { color: var(--primary); }

.card p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; }

.card ul {
  list-style: none;
  margin-bottom: 24px;
  flex-grow: 1;
}
.card li {
  padding-left: 22px;
  position: relative;
  font-size: 0.88rem;
  margin-bottom: 9px;
}
.card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--thermal);
}

/* ---------- Split (Kora / Como funciona) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.split-reverse .split-copy { order: 2; }
.split-reverse .split-media { order: 1; }

.split-media img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}

.checklist { list-style: none; }
.checklist li {
  padding-left: 30px;
  position: relative;
  margin-bottom: 14px;
  font-size: 1rem;
}
.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 800;
  background: var(--thermal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Como funciona (passos em coluna) ---------- */
.steps-column { display: flex; flex-direction: column; gap: 26px; }

.step { display: flex; gap: 18px; align-items: flex-start; }

.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 { margin-bottom: 4px; }
.step p { color: var(--text-dim); font-size: 0.95rem; }

/* ---------- Depoimento ---------- */
.quote-wrap { max-width: 820px; }

.quote {
  border-left: 4px solid;
  border-image: var(--thermal) 1;
  padding-left: 28px;
}
.quote p {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 20px;
}
.quote footer strong { display: block; }
.quote footer span { color: var(--text-dim); font-size: 0.9rem; }

/* ---------- Parceria Dagio ---------- */
.partner { text-align: center; max-width: 860px; margin: 0 auto; }

.partner-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #4ade80;
  background: rgba(34, 197, 94, 0.12);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.partner-sub {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 0 auto 36px;
}
.partner-sub strong { color: var(--text); }

.partner-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  text-align: left;
}
.partner-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.partner-col h3 { margin-bottom: 8px; }
.partner-col p { color: var(--text-dim); font-size: 0.92rem; }

/* ---------- Contato ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.contact-form input,
.contact-form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-slogan {
  font-weight: 700;
  letter-spacing: 0.04em;
  background: var(--thermal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.footer-rad { font-size: 0.85rem; }
.footer-copy { font-size: 0.8rem; }

/* link discreto para o Kelvin Engineer (ecossistema) */
.footer-ecosystem {
  font-size: 0.82rem;
  margin-top: 4px;
}
.footer-ecosystem a {
  color: var(--primary-light);
  border-bottom: 1px solid transparent;
}
.footer-ecosystem a:hover { border-bottom-color: var(--primary-light); }

/* ---------- Responsivo ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-login { display: none; }

  /* menu off-canvas: some por padrão, aparece quando .open no header */
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    transform: translateY(-120%);
    transition: transform 0.25s ease;
    z-index: 40;
  }
  .nav.open .nav-links { transform: translateY(0); }
  .nav-links a {
    padding: 14px 24px;
    border-top: 1px solid var(--border);
    color: var(--text);
  }

  .split, .contact-grid, .partner-cols { grid-template-columns: 1fr; }
  .split-reverse .split-copy { order: 1; }
  .split-reverse .split-media { order: 2; }
  .cards-4 { grid-template-columns: 1fr 1fr; }

  /* hero: scrim mais escuro e uniforme para o texto sobre o vídeo */
  .hero { min-height: auto; padding: 56px 0; }
  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(5,11,24,0.78) 0%, rgba(5,11,24,0.62) 45%, rgba(5,11,24,0.85) 100%);
  }
  .hero-copy { max-width: none; }
  .section { padding: 56px 0; }
  .stats { padding: 28px 24px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .cards-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 24px 12px; }
  .lang-switch button { padding: 5px 8px; }
  .hero-ctas .btn { flex: 1 1 100%; text-align: center; }
  .contact-buttons .btn, .hero-ctas .btn { width: 100%; }
  .section-title { font-size: 1.5rem; }
}