/* ==========================================================================
   Mercadata — Gestor de Cuentas Mercado Libre con IA (Light Theme)
   Tema claro elegante y moderno — Vue.js sin jQuery
   ========================================================================== */

/* --- Variables de color (light) --- */
:root {
  --c-bg: #ffffff;
  --c-bg-elev: #fafafa;
  --c-bg-panel: #ffffff;
  --c-surface: #f8f9fa;
  --c-surface-2: #f0f2f5;
  --c-border: #e3e6ea;
  --c-border-2: #d1d5db;
  --c-text: #1a1a2e;
  --c-text-2: #475469;
  --c-text-3: #94a3b8;
  --c-accent: #0070f3; /* Azul profesional */
  --c-accent-2: #0052cc;
  --c-green: #16a34a;
  --c-amber: #d97706;
  --c-purple: #7c3aed;
  --c-red: #dc2626;
  --c-radius: 24px;
  --c-radius-sm: 12px;
  --c-transition: 0.2s ease;
  --c-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --c-shadow-2: 0 4px 24px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
  --c-shadow-3: 0 8px 32px rgba(0, 0, 0, 0.08);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* --- Reset y base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(165deg, #ffffff 0%, #f0f4ff 100%);
  color: var(--c-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

button, input {
  font: inherit;
}

ul, ol {
  list-style: none;
}

/* --- Layout --- */
.container {
  width: min(92%, 1200px);
  margin-inline: auto;
}

.section {
  padding-block: 5rem;
}

.section-sm {
  padding-block: 3rem;
}

/* --- Tipografía --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.7rem); }
h4 { font-size: 1.15rem; }

.lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--c-text-2);
  max-width: 640px;
  margin-inline: auto;
}

.muted { color: var(--c-text-3); }
.secondary { color: var(--c-text-2); }

/* --- Utilidades --- */
.text-center { text-align: center; }
.text-left { text-align: left; }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid {
  display: grid;
  gap: 2rem;
}

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--c-shadow);
}

.navbar-inner {
  height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar .logo img {
  height: 36px;
  width: auto;
}

.navbar .nav-links {
  display: flex;
  gap: 1.75rem;
}

.navbar .nav-links a {
  font-size: 0.875rem;
  color: var(--c-text-2);
  transition: color var(--c-transition);
}

.navbar .nav-links a:hover {
  color: var(--c-accent);
}

.navbar .btn-cta {
  font-size: 0.875rem;
}

/* --- Hero --- */
.hero {
  padding-block: 6rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 30%, var(--c-accent), transparent 60%);
  opacity: 0.04;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.1fr 1fr;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: var(--c-accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.hero-badge .pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.8);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.2rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--c-accent) 25%, var(--c-purple) 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-text-2);
  margin-bottom: 1.75rem;
  max-width: 480px;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.hero-btns .btn {
  font-size: 0.95rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--c-radius-sm);
  font-weight: 600;
  transition: all var(--c-transition);
}

.hero-btns .btn-primary {
  background: var(--c-accent);
  color: white;
  border: none;
  box-shadow: 0 0 0 0px rgba(0, 112, 243, 0.35);
}

.hero-btns .btn-primary:hover {
  background: var(--c-accent-2);
  box-shadow: 0 0 0 8px rgba(0, 112, 243, 0.15);
  transform: translateY(-2px);
}

.hero-btns .btn-ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border-2);
}

.hero-btns .btn-ghost:hover {
  background: var(--c-bg-elev);
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.trust-line {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.trust-line .trust-text {
  font-size: 0.75rem;
  color: var(--c-text-3);
  letter-spacing: 0.03em;
}

.trust-line .stars {
  color: var(--c-amber);
  font-size: 0.9rem;
}

.hero-visual {
  justify-self: center;
  max-width: 420px;
  width: 100%;
}

.hero-visual .app-mockup {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  box-shadow: var(--c-shadow-2);
  overflow: hidden;
}

/* --- Features --- */
.features {
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  text-align: center;
  padding: 2rem;
  background: var(--c-bg-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  transition: all var(--c-transition);
  box-shadow: var(--c-shadow);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-border-2);
  box-shadow: var(--c-shadow-3);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-inline: auto;
  margin-bottom: 1.2rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.feature-icon.blue { background: rgba(0, 112, 243, 0.1); color: var(--c-accent); }
.feature-icon.green { background: rgba(22, 163, 74, 0.1); color: var(--c-green); }
.feature-icon.purple { background: rgba(124, 57, 237, 0.1); color: var(--c-purple); }
.feature-icon.amber { background: rgba(217, 119, 6, 0.1); color: var(--c-amber); }

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--c-text-2);
}

/* --- Pricing --- */
.pricing {
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding-block: 6rem 4rem;
}

.pricing-header {
  text-align: center;
  margin-bottom: 4rem;
}

.pricing-header .badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  background: rgba(22, 163, 74, 0.1);
  color: var(--c-green);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.pricing-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.pricing-title .gradient-text {
  background: linear-gradient(135deg, var(--c-accent) 30%, var(--c-purple) 75%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-subtitle {
  color: var(--c-text-2);
  margin-top: 0.75rem;
  font-size: 1.05rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.plan-card {
  background: var(--c-bg-panel);
  border: 1.5px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  padding: 2rem;
  text-align: center;
  transition: all var(--c-transition);
  display: flex;
  flex-direction: column;
  flex: 1;
  box-shadow: var(--c-shadow);
}

.plan-card:hover {
  border-color: var(--c-border-2);
  box-shadow: var(--c-shadow-3);
  transform: translateY(-4px);
}

.plan-card.popular {
  border-color: var(--c-accent);
  position: relative;
}

.plan-card.popular::before {
  content: "Más popular";
  position: absolute;
  top: -0.85rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--c-accent);
  color: white;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.2rem 1rem;
  border-radius: 999px;
}

.plan-card.popular .plan-name {
  color: var(--c-accent);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: capitalize;
}

.plan-price {
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.plan-price .small {
  font-size: 0.4em;
  opacity: 0.6;
}

.plan-desc {
  color: var(--c-text-2);
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  flex-grow: 1;
}

.plan-features {
  text-align: left;
  margin-bottom: 1.5rem;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.87rem;
  color: var(--c-text-2);
  margin-bottom: 0.5rem;
}

.plan-features li i {
  color: var(--c-green);
  font-size: 1.05rem;
}

.plan-card .btn {
  margin-top: auto;
  font-weight: 600;
  padding: 0.8rem 1.5rem;
  border-radius: var(--c-radius-sm);
  transition: all var(--c-transition);
  width: 100%;
}

.plan-card .btn-ghost {
  background: transparent;
  color: var(--c-text-2);
  border: 1px solid var(--c-border-2);
}

.plan-card .btn-ghost:hover {
  background: var(--c-bg-elev);
  color: var(--c-accent);
}

/* --- IA Packages --- */
.packages {
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.package-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.package-card {
  background: var(--c-bg-panel);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: all var(--c-transition);
  box-shadow: var(--c-shadow);
}

.package-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-3px);
  box-shadow: var(--c-shadow-3);
}

.package-card.popular {
  border-color: var(--c-accent);
  position: relative;
}

.package-card.popular::after {
  content: "Más usado";
  position: absolute;
  top: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--c-accent);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.18rem 0.8rem;
  border-radius: 999px;
}

.package-inference {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 0.3rem;
}

.package-inference .unit {
  font-size: 0.55em;
  opacity: 0.5;
}

.package-price {
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.package-price .currency {
  font-size: 0.6em;
  opacity: 0.6;
}

.package-desc {
  font-size: 0.82rem;
  color: var(--c-text-3);
  margin-bottom: 1rem;
}

/* --- Download --- */
.download {
  background: linear-gradient(135deg, var(--c-accent), var(--c-purple));
  padding-block: 6rem 4rem;
  text-align: center;
}

.download .section-title {
  color: white;
}

.download .gradient-text {
  background: none;
  -webkit-text-fill-color: white;
  color: white;
}

.download-subtitle {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.download-steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 3rem 0;
}

@media (min-width: 768px) {
  .download-steps {
    flex-direction: row;
  }
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h4 {
  font-size: 1.05rem;
  color: white;
}

.step p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.85);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: white;
  color: var(--c-accent);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.95rem 2rem;
  border-radius: var(--c-radius-sm);
  transition: all var(--c-transition);
  box-shadow: 0 0 32px rgba(0, 0, 0, 0.25);
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.35);
}

.download-safety {
  margin-top: 2rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
}

.download-safety i {
  color: rgba(255, 255, 255, 0.4);
}

/* --- FAQ --- */
.faq {
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.faq-item {
  border-bottom: 1px solid var(--c-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--c-transition);
}

.faq-question:hover {
  color: var(--c-accent);
}

.faq-question .icon {
  margin-left: 1rem;
  transition: transform var(--c-transition);
  color: var(--c-text-3);
}

.faq-item.open .faq-question .icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--c-text-2);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

/* --- CTA --- */
.cta {
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  text-align: center;
  padding-block: 5rem 3rem;
}

.cta .section-title {
  margin-bottom: 1rem;
}

.cta .lead {
  margin-inline: auto;
}

.cta .btn {
  font-size: 1rem;
  padding: 0.9rem 2rem;
  border-radius: var(--c-radius-sm);
  font-weight: 600;
  margin-top: 1.5rem;
}

/* --- Footer --- */
footer {
  background: var(--c-bg-elev);
  border-top: 1px solid var(--c-border);
  padding-block: 3rem 2rem;
  font-size: 0.83rem;
  color: var(--c-text-3);
}

footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}

footer .footer-col h4 {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-text-2);
  margin-bottom: 0.85rem;
}

footer .footer-col a {
  color: var(--c-text-3);
  transition: color var(--c-transition);
}

footer .footer-col a:hover {
  color: var(--c-accent);
}

footer .footer-bottom {
  border-top: 1px solid var(--c-border);
  margin-top: 2rem;
  padding-top: 1.5rem;
  text-align: center;
  color: var(--c-text-3);
  font-size: 0.78rem;
}

/* --- Toast --- */
#toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: white;
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-green);
  padding: 1rem 1.25rem;
  border-radius: var(--c-radius-sm);
  box-shadow: var(--c-shadow-3);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.4s ease;
  pointer-events: none;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 380px;
}

#toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

#toast.error {
  border-left-color: var(--c-red);
}

/* --- Responsividad --- */
@media (max-width: 768px) {
  .navbar .nav-links { display: none; }
  .container { width: 92%; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
}