/* ============================================================
   CFDI Master · Landing page
   Tema: dark mode tecnológico, gradientes, glassmorphism
   Paleta: azul noche + cian + verde esmeralda
   ============================================================ */

:root {
  --bg: #0A0E27;
  --bg-2: #111633;
  --surface: #1A2140;
  --primary: #2563EB;
  --accent: #06B6D4;
  --success: #10B981;
  --text: #F8FAFC;
  --text-2: #94A3B8;
  --border: rgba(255,255,255,0.08);
  --grad: linear-gradient(135deg, #2563EB, #06B6D4);
  --grad-green: linear-gradient(135deg, #10B981, #06B6D4);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: 'Space Grotesk', sans-serif; line-height: 1.2; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Botones ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s, background .2s;
  border: none;
  cursor: pointer;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 30px rgba(37,99,235,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(37,99,235,.5); }
.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: rgba(37,99,235,.15); }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-xl { padding: 18px 36px; font-size: 17px; border-radius: 12px; }
.btn-xl .icon { width: 22px; height: 22px; }
.btn .windows { margin-right: 2px; }

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,14,39,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--grad); font-weight: 700; color: #fff; font-family: 'Space Grotesk';
}
.brand-name { font-size: 18px; letter-spacing: .5px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--text-2); text-decoration: none; font-size: 14px; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { padding: 9px 16px; font-size: 13px; }

/* ── Hero ── */
.hero { position: relative; padding: 90px 0 60px; text-align: center; overflow: hidden; }
.hero-glow, .cta-glow {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none;
}
.hero-glow { width: 600px; height: 600px; top: -150px; left: 50%; transform: translateX(-50%); background: radial-gradient(circle, #2563EB, transparent 70%); }
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 30px;
  background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.3);
  color: var(--success); font-size: 13px; font-weight: 600; margin-bottom: 28px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(16,185,129,.6); } 50% { box-shadow: 0 0 0 8px rgba(16,185,129,0); } }
.hero-title { font-size: 58px; font-weight: 700; max-width: 800px; margin: 0 auto 20px; letter-spacing: -1px; }
.hero-sub { font-size: 18px; color: var(--text-2); max-width: 680px; margin: 0 auto 36px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; margin-bottom: 24px; }
.hero-micro { color: var(--text-2); font-size: 14px; }
.hero-micro .check { color: var(--success); font-weight: 700; }
.hero-stats {
  display: flex; justify-content: center; gap: 60px; margin-top: 56px;
  padding: 28px 0; border-top: 1px solid var(--border);
}
.stat-num { font-size: 32px; font-weight: 700; font-family: 'Space Grotesk'; color: var(--text); }
.stat-label { color: var(--text-2); font-size: 14px; margin-top: 4px; }

/* ── Logos bar ── */
.logos-bar { padding: 36px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.logos-label { text-align: center; color: var(--text-2); font-size: 12px; letter-spacing: 2px; margin-bottom: 20px; }
.logos { display: flex; justify-content: center; gap: 50px; flex-wrap: wrap; }
.logo { color: var(--text-2); font-weight: 600; font-size: 16px; letter-spacing: 1px; opacity: .6; font-family: 'Space Grotesk'; }

/* ── Secciones comunes ── */
section { padding: 80px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-title { font-size: 40px; font-weight: 700; margin-bottom: 16px; letter-spacing: -.5px; }
.section-sub { color: var(--text-2); font-size: 16px; }

/* ── Problema ── */
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.problem-card, .feature-card, .price-card, .testimonial-card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 16px; padding: 28px;
}
.problem-card h3 { font-size: 18px; margin-bottom: 8px; }
.problem-card p, .feature-card p { color: var(--text-2); font-size: 14px; }
.card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 16px;
}
.card-icon svg { width: 22px; height: 22px; }
.card-icon.red { background: rgba(239,68,68,.15); color: #F87171; }
.card-icon.blue { background: rgba(37,99,235,.15); color: #60A5FA; }
.card-icon.green { background: rgba(16,185,129,.15); color: #34D399; }
.card-icon.purple { background: rgba(139,92,246,.15); color: #A78BFA; }
.card-icon.cyan { background: rgba(6,182,212,.15); color: #22D3EE; }
.card-icon.orange { background: rgba(249,115,22,.15); color: #FB923C; }
.card-icon.lime { background: rgba(132,204,22,.15); color: #A3E635; }

/* ── Features ── */
.features { background: var(--bg-2); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { transition: transform .3s, border-color .3s; }
.feature-card:hover { transform: translateY(-6px); border-color: rgba(37,99,235,.5); }
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }

/* ── Cómo funciona ── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.step-num {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--grad); color: #fff; font-size: 24px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-family: 'Space Grotesk';
}
.step h3 { font-size: 20px; margin-bottom: 8px; }
.step p { color: var(--text-2); font-size: 14px; }

/* ── Testimonios ── */
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card .stars { color: #FBBF24; margin-bottom: 12px; letter-spacing: 2px; }
.testimonial-card p { color: var(--text-2); font-size: 14px; font-style: italic; margin-bottom: 16px; }
.testimonial-card .person strong { display: block; font-size: 14px; }
.testimonial-card .person span { color: var(--text-2); font-size: 12px; }

/* ── Pricing ── */
.pricing { background: var(--bg-2); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card { position: relative; display: flex; flex-direction: column; }
.price-card h3 { font-size: 16px; color: var(--text-2); margin-bottom: 8px; }
.price { font-size: 40px; font-weight: 700; font-family: 'Space Grotesk'; margin-bottom: 16px; }
.price .per { font-size: 14px; color: var(--text-2); font-weight: 400; }
.price-card ul { list-style: none; margin-bottom: 24px; flex: 1; }
.price-card li { padding: 8px 0; color: var(--text-2); font-size: 14px; border-bottom: 1px solid var(--border); }
.price-card li::before { content: "✓ "; color: var(--success); font-weight: 700; }
.price-card .btn { width: 100%; }
.price-card.featured {
  background: var(--surface); border: 2px solid var(--primary); transform: scale(1.04); box-shadow: 0 20px 60px rgba(37,99,235,.25);
}
.badge-popular {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; padding: 6px 18px; border-radius: 20px;
  font-size: 11px; font-weight: 700; letter-spacing: 1px;
}
.pricing-note { text-align: center; color: var(--text-2); font-size: 13px; margin-top: 28px; }

/* ── FAQ ── */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-list details {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px;
  margin-bottom: 12px; overflow: hidden;
}
.faq-list summary {
  padding: 18px 22px; cursor: pointer; font-weight: 600; font-size: 15px;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-list summary::after { content: "+"; font-size: 22px; color: var(--primary); transition: transform .2s; }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details p { padding: 0 22px 18px; color: var(--text-2); font-size: 14px; }

/* ── CTA final ── */
.cta-final { position: relative; padding: 100px 0; text-align: center; overflow: hidden; }
.cta-glow { width: 500px; height: 500px; top: -100px; left: 50%; transform: translateX(-50%); background: radial-gradient(circle, #10B981, transparent 70%); }
.cta-inner { position: relative; z-index: 1; }
.cta-title { font-size: 44px; font-weight: 700; margin-bottom: 16px; }
.cta-sub { color: var(--text-2); font-size: 17px; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.download-buttons { display: flex; gap: 16px; justify-content: center; margin-bottom: 20px; }
.btn-xl small { display: block; font-size: 12px; font-weight: 400; opacity: .85; margin-top: 2px; }

/* ── Footer ── */
.footer { border-top: 1px solid var(--border); padding: 60px 0 0; background: var(--bg); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .logo-mark { margin-bottom: 12px; }
.footer-brand p { color: var(--text-2); font-size: 14px; margin-top: 12px; max-width: 260px; }
.footer-col h4 { font-size: 14px; margin-bottom: 14px; }
.footer-col a { display: block; color: var(--text-2); text-decoration: none; font-size: 14px; margin-bottom: 8px; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px 0;
  display: flex; justify-content: space-between; color: var(--text-2); font-size: 13px;
}

/* ── Animaciones on-scroll ── */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero-title { font-size: 40px; }
  .features-grid, .problem-grid, .testimonial-grid, .pricing-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 30px; }
  .price-card.featured { transform: none; }
  .download-buttons { flex-direction: column; align-items: center; }
  .section-title { font-size: 32px; }
  .cta-title { font-size: 34px; }
}