/* ===========================================================
   AUTEK Labs — Website
   Paleta e identidad tomadas de EXPERTO_CREATIVO.md / CLAUDE.md
   =========================================================== */

:root {
  --bg: #050505;
  --bg-alt: #0a0a0a;
  --teal: #00c9b1;
  --white: #ffffff;
  --gray-light: #a0a0a0;
  --gray-dark: #1a1a1a;
  --border: rgba(255, 255, 255, 0.08);
  --max-width: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 32px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 820px;
}

.section-lead {
  font-size: 17px;
  color: var(--gray-light);
  max-width: 640px;
  margin-bottom: 48px;
}

.accent { color: var(--teal); }

/* ===================== BUTTONS ===================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 30px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 4px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--teal);
  color: #012019;
}
.btn-primary:hover { background: #21d9c2; transform: translateY(-1px); }

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--white);
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

/* ===================== NAV ===================== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img { height: 26px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 14px;
  font-weight: 600;
}

.nav-links a { color: var(--gray-light); transition: color 0.2s ease; }
.nav-links a:hover { color: var(--white); }

.nav-cta {
  background: var(--teal);
  color: #012019 !important;
  padding: 10px 18px;
  border-radius: 4px;
}
.nav-cta:hover { background: #21d9c2; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--white);
  border-radius: 2px;
}

/* ===================== HERO ===================== */

.hero {
  position: relative;
  overflow: hidden;
  padding-top: 96px;
  min-height: 92vh;
  display: flex;
  align-items: center;
}

.hero-bg-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(0, 201, 177, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: -120px; right: -160px;
  width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(0, 201, 177, 0.10) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 32px;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gray-light);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 3px;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(42px, 7vw, 84px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.02;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 19px;
  color: var(--gray-light);
  max-width: 620px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  border-top: 1px solid var(--border);
  padding-top: 36px;
  max-width: 900px;
}

.hero-stat { display: flex; flex-direction: column; gap: 8px; }
.hero-stat-num { font-size: 28px; font-weight: 800; color: var(--teal); }
.hero-stat-label { font-size: 13px; color: var(--gray-light); line-height: 1.4; }

/* ===================== PROBLEMA ===================== */

.problema { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

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

.problema-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 32px 24px;
  transition: border-color 0.2s ease;
}
.problema-card:hover { border-color: rgba(0, 201, 177, 0.4); }

.problema-icon { font-size: 26px; margin-bottom: 18px; color: var(--teal); }
.problema-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.problema-card p { font-size: 14px; color: var(--gray-light); }

/* ===================== SOLUCIONES ===================== */

.soluciones-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.solucion-card {
  background: var(--bg);
  padding: 40px;
}

.solucion-num {
  display: block;
  font-size: 13px;
  font-weight: 800;
  color: var(--teal);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.solucion-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.solucion-card p { font-size: 14.5px; color: var(--gray-light); }

/* ===================== PROCESO ===================== */

.proceso { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.proceso-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.proceso-step { position: relative; padding-top: 8px; }

.proceso-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid rgba(0, 201, 177, 0.4);
  color: var(--teal);
  border-radius: 50%;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 18px;
}

.proceso-step h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.proceso-step p { font-size: 14px; color: var(--gray-light); }

/* ===================== MODELO B2B ===================== */

.modelo-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.modelo-diagram {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modelo-box {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 22px 24px;
  font-weight: 700;
  font-size: 15px;
  text-align: center;
  background: var(--bg-alt);
}

.modelo-box-main { border-color: rgba(255,255,255,0.25); }
.modelo-box-accent { border-color: var(--teal); color: var(--teal); }

.modelo-arrow {
  text-align: center;
  font-size: 12px;
  color: var(--gray-light);
  letter-spacing: 0.02em;
}

/* ===================== CALCULADORA ===================== */

.calc-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 48px;
  background: var(--bg-alt);
  max-width: 820px;
}

.calc-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
  color: var(--gray-light);
  font-weight: 600;
}

.calc-field input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 14px;
  color: var(--white);
  font-size: 16px;
  font-family: inherit;
  font-weight: 700;
}
.calc-field input[type="number"]:focus { outline: none; border-color: var(--teal); }

.calc-field input[type="range"] {
  accent-color: var(--teal);
}

.calc-range-value {
  color: var(--teal);
  font-weight: 800;
  font-size: 15px;
}

.calc-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
  margin-bottom: 24px;
}

.calc-result { display: flex; flex-direction: column; gap: 8px; }
.calc-result-label { font-size: 12.5px; color: var(--gray-light); }
.calc-result-value { font-size: 26px; font-weight: 800; }
.calc-result-accent .calc-result-value { color: var(--teal); }

.calc-disclaimer {
  font-size: 12.5px;
  color: var(--gray-light);
  margin-bottom: 28px;
}

/* ===================== CREDIBILIDAD ===================== */

.credibilidad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.credibilidad-card {
  border-left: 2px solid var(--teal);
  padding: 8px 0 8px 22px;
  font-size: 15px;
  color: var(--gray-light);
}

/* ===================== CONTACTO ===================== */

.contacto { background: var(--bg-alt); border-top: 1px solid var(--border); }

.contacto-inner { text-align: center; display: flex; flex-direction: column; align-items: center; }
.contacto-inner .section-title { max-width: 700px; }
.contacto-inner .section-lead { margin-left: auto; margin-right: auto; }

.contacto-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ===================== FOOTER ===================== */

.footer { border-top: 1px solid var(--border); padding: 56px 32px; }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-logo { height: 22px; }
.footer-eslogan { color: var(--gray-light); font-size: 14px; }

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 13px;
  font-weight: 700;
}
.footer-links a { color: var(--gray-light); }
.footer-links a:hover { color: var(--teal); }

.footer-fine { font-size: 12px; color: rgba(255, 255, 255, 0.35); margin-top: 8px; }

/* ===================== RESPONSIVE ===================== */

@media (max-width: 900px) {
  .hero-stats { grid-template-columns: 1fr; gap: 20px; }
  .problema-grid { grid-template-columns: repeat(2, 1fr); }
  .soluciones-grid { grid-template-columns: 1fr; }
  .proceso-steps { grid-template-columns: repeat(2, 1fr); }
  .modelo-inner { grid-template-columns: 1fr; }
  .calc-inputs { grid-template-columns: 1fr; }
  .calc-results { grid-template-columns: 1fr; }
  .credibilidad-grid { grid-template-columns: 1fr; }
}

/* ===================== SCROLL REVEAL ===================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 32px 20px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 0; width: 100%; border-bottom: 1px solid var(--border); }
  .nav-links a:last-child { border-bottom: none; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle { display: flex; }
  .problema-grid { grid-template-columns: 1fr; }
  .proceso-steps { grid-template-columns: 1fr; }
  .calc-box { padding: 28px; }
}