/* ==========================================================================
   INFLUWEB — Sistema Visual v2 (Tema Oscuro)
   Proyecto: landing-premium
   Autor: Lucía (Diseño gráfico e identidad visual)
   Fecha: 2026-11-03
   Cliente: INFLUWEB
   Aprobador: Rafael Carcel Ridaura
   Nota para Diego: Este archivo es la base obligatoria para el desarrollo.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES CSS
   -------------------------------------------------------------------------- */
:root {
  /* Colores */
  --color-bg: #0E100F;
  --color-surface-1: #151816;
  --color-surface-2: #1C1F1D;
  --color-border: #282C2A;
  --color-text-primary: #EDF0EE;
  --color-text-secondary: #B6BDB9;
  --color-text-muted: #8E9792;
  --color-accent: #00E5A0;
  --color-text-on-accent: #04140D;

  /* Tipografía */
  --font-heading: 'Bricolage Grotesque', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Escala tipográfica */
  --text-h1-size: clamp(2.35rem, 5vw, 3.9rem);
  --text-h1-weight: 750;
  --text-h1-line-height: 1.04;
  --text-h1-letter-spacing: -0.018em;
  --text-h1-max-width: 17ch;

  --text-h2-size: clamp(1.9rem, 4.2vw, 2.9rem);
  --text-h2-weight: 700;
  --text-h2-line-height: 1.1;
  --text-h2-letter-spacing: -0.012em;
  --text-h2-max-width: 22ch;

  --text-body-size: 1rem;
  --text-body-line-height: 1.6;

  --text-lead-size: 1.125rem;
  --text-lead-line-height: 1.7;

  /* Layout */
  --container-max-width: 1200px;
  --container-padding-x: 24px;
  --section-padding-y: 96px;
  --section-padding-y-mobile: 64px;

  /* Detalles */
  --radius-lg: 14px;
  --radius-sm: 9px;
  --transition-base: .25s cubic-bezier(.4, 0, .2, 1);
}

/* --------------------------------------------------------------------------
   2. RESET Y ESTILOS BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
}

/* --------------------------------------------------------------------------
   3. LAYOUT
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding-x);
}

.section {
  padding-block: var(--section-padding-y);
}

@media (max-width: 768px) {
  .section {
    padding-block: var(--section-padding-y-mobile);
  }
}

/* --------------------------------------------------------------------------
   4. TIPOGRAFÍA
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--text-h1-size);
  font-weight: var(--text-h1-weight);
  line-height: var(--text-h1-line-height);
  letter-spacing: var(--text-h1-letter-spacing);
  max-width: var(--text-h1-max-width);
}

h2 {
  font-size: var(--text-h2-size);
  font-weight: var(--text-h2-weight);
  line-height: var(--text-h2-line-height);
  letter-spacing: var(--text-h2-letter-spacing);
  max-width: var(--text-h2-max-width);
}

p {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-text-primary);
}

.lead {
  font-size: var(--text-lead-size);
  line-height: var(--text-lead-line-height);
  color: var(--color-text-secondary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

code,
pre,
kbd,
samp,
.mono {
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   5. ENLACES Y ACENTOS
   -------------------------------------------------------------------------- */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

a:hover {
  opacity: 0.8;
}

/* --------------------------------------------------------------------------
   6. SUPERFICIES Y BORDES
   -------------------------------------------------------------------------- */
.surface-1 {
  background-color: var(--color-surface-1);
}

.surface-2 {
  background-color: var(--color-surface-2);
}

.border {
  border: 1px solid var(--color-border);
}

.radius-lg {
  border-radius: var(--radius-lg);
}

.radius-sm {
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   7. COMPONENTES: ETIQUETA DE SECCIÓN
   -------------------------------------------------------------------------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.section-label::before {
  content: "";
  display: block;
  width: 18px;
  height: 1px;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   8. TRANSICIONES GLOBALES
   -------------------------------------------------------------------------- */
button,
input,
select,
textarea {
  font-family: inherit;
  transition: all var(--transition-base);
}

/* ==========================================================================
   DIEGO — Estilos de Sección y Componentes
   ========================================================================== */

/* Focus accesible */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 68px;
  background: rgba(14, 16, 15, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-text-primary);
  opacity: 1;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-primary);
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--color-surface-1);
    border-bottom: 1px solid var(--color-border);
    padding: 24px;
    gap: 20px;
    transform: translateY(-120%);
    transition: transform var(--transition-base);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .hamburger {
    display: block;
  }
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-text-muted);
  opacity: 1;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}

/* Hero */
.hero {
  padding-top: calc(68px + var(--section-padding-y));
  padding-bottom: var(--section-padding-y);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: start;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.hero-subtitle {
  margin-top: 20px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.guarantees {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
}

.guarantees li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.guarantees svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

/* Tarjeta Flujo */
.flow-card {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.flow-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-text-primary);
}

.flow-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.flow-row:last-child {
  border-bottom: none;
}

.flow-time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.flow-compare {
  margin-top: 24px;
  padding: 16px;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.flow-compare span {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.flow-compare .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.flow-compare .val-manual {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.flow-compare .val-auto {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 600;
}

.flow-disclaimer {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: right;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Tarjetas */
.card {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  color: var(--color-accent);
}

/* Proceso */
.process-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Para quién */
.audience-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

/* FAQ */
details {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

details:first-of-type {
  border-top: 1px solid var(--color-border);
}

summary {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-primary);
}

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

summary::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

details[open] summary::after {
  content: "−";
}

details p {
  margin-top: 12px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* Formulario */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input,
.form-group textarea {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  outline: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

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

.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-col a {
  color: var(--color-text-secondary);
}

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

.footer-legal {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-legal a {
  color: var(--color-text-muted);
}

/* Animación aparición */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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