/**
 * BillCommerce Landing Page - Custom Styles
 * Copyright 2025 BillCommerce
 * Estilos personalizados basados en Bootstrap 5
 */

/* ========================================
   Variables CSS Personalizadas
   ======================================== */
:root {
  /* Colores Principales */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  
  /* Colores de Fondo */
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #1e293b;
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Colores de Texto */
  --text-dark: #1e293b;
  --text-gray: #64748b;
  --text-light: #94a3b8;
  
  /* Tipografía */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-headings: 'Poppins', sans-serif;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Bordes */
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Transiciones */
  --transition: all 0.3s ease;
}

/* ========================================
   Estilos Generales
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  h4 { font-size: 1.25rem; }
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title h2 {
  color: var(--text-dark);
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-sm);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 2px;
}

.section-title p {
  color: var(--text-gray);
  font-size: 1.125rem;
  margin-top: var(--spacing-sm);
}

/* ========================================
   Header / Navegación
   ======================================== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
  padding: 1rem 0;
  background: transparent;
}

#header.header-scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

#header .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-headings);
  letter-spacing: 1px;
}

#header.header-scrolled .logo {
  color: var(--primary-color);
}

.navbar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar a {
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
}

#header.header-scrolled .navbar a {
  color: var(--text-dark);
}

.navbar a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

.navbar a:hover::after,
.navbar a.active::after {
  width: 100%;
}

.navbar a:hover,
.navbar a.active {
  color: var(--primary-light);
}

#header.header-scrolled .navbar a:hover,
#header.header-scrolled .navbar a.active {
  color: var(--primary-color);
}

.btn-cta {
  background: var(--primary-color);
  color: #fff !important;
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  border: 2px solid var(--primary-color);
  transition: var(--transition);
}

.btn-cta::after {
  display: none;
}

.btn-cta:hover {
  background: transparent;
  color: var(--primary-color) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

#header.header-scrolled .btn-cta:hover {
  background: var(--primary-color);
  color: #fff !important;
}

/* Mobile Navigation */
.mobile-nav-toggle {
  display: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: #fff;
  transition: var(--transition);
}

#header.header-scrolled .mobile-nav-toggle {
  color: var(--text-dark);
}

@media (max-width: 991px) {
  .mobile-nav-toggle {
    display: block;
  }
  
  .navbar {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-white);
    box-shadow: var(--shadow-xl);
    transition: 0.3s;
    padding: 5rem 2rem 2rem;
  }
  
  .navbar.navbar-mobile {
    right: 0;
  }
  
  .navbar ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .navbar a {
    color: var(--text-dark) !important;
    width: 100%;
    padding: 0.5rem 0;
  }
}

/* ========================================
   Hero Section
   ======================================== */
#hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  padding-top: 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,112C1248,107,1344,117,1392,122.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
  background-size: cover;
  opacity: 0.3;
}

#hero .container {
  position: relative;
  z-index: 1;
}

#hero h1 {
  color: #fff;
  font-size: 3.5rem;
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 0.8s ease-out;
}

#hero h2 {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

#hero .hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

#hero .btn-primary {
  background: #fff;
  color: var(--primary-color);
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  border: 2px solid #fff;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

#hero .btn-primary:hover {
  background: transparent;
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

#hero .btn-secondary {
  background: transparent;
  color: #fff;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  border: 2px solid rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

#hero .btn-secondary:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

#hero .hero-img {
  animation: fadeInRight 0.8s ease-out 0.6s both;
}

#hero .hero-img svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 768px) {
  #hero {
    text-align: center;
    padding-top: 100px;
    min-height: auto;
    padding-bottom: 60px;
  }
  
  #hero h1 {
    font-size: 2rem;
  }
  
  #hero h2 {
    font-size: 1.125rem;
  }
  
  #hero .hero-buttons {
    justify-content: center;
    flex-direction: column;
  }
  
  #hero .btn-primary,
  #hero .btn-secondary {
    width: 100%;
    max-width: 300px;
  }
}

/* ========================================
   About Section
   ======================================== */
#about {
  background: var(--bg-white);
}

.feature-box {
  padding: var(--spacing-md);
  text-align: center;
  transition: var(--transition);
  border-radius: var(--border-radius-lg);
}

.feature-box:hover {
  transform: translateY(-10px);
  background: var(--bg-light);
}

.feature-box .icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
  font-size: 2rem;
  color: #fff;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.feature-box:hover .icon {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.feature-box h4 {
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.feature-box p {
  color: var(--text-gray);
  font-size: 0.95rem;
}

/* ========================================
   Services Section
   ======================================== */
#services {
  background: var(--bg-light);
}

.service-card {
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
  border: 1px solid transparent;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.service-card .icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  font-size: 2rem;
  color: #fff;
  transition: var(--transition);
}

.service-card:hover .icon {
  transform: scale(1.1) rotate(5deg);
}

.service-card h4 {
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.service-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ========================================
   Pricing Section
   ======================================== */
#pricing {
  background: var(--bg-white);
}

.pricing-card {
  background: var(--bg-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 2px solid transparent;
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.pricing-card.featured {
  border-color: var(--primary-color);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  color: #fff;
  padding: 0.5rem 2rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-card h3 {
  color: var(--text-dark);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.pricing-card .price {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.pricing-card .price h4 {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 0;
}

.pricing-card .price span {
  color: var(--text-gray);
  font-size: 1rem;
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.pricing-card ul li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--bg-light);
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-card ul li i {
  color: var(--secondary-color);
  font-size: 1.25rem;
}

.pricing-card ul li.disabled {
  opacity: 0.5;
}

.pricing-card ul li.disabled i {
  color: var(--text-light);
}

.pricing-card .btn-pricing {
  background: var(--primary-color);
  color: #fff;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  text-align: center;
  display: block;
  transition: var(--transition);
  border: 2px solid var(--primary-color);
}

.pricing-card .btn-pricing:hover {
  background: transparent;
  color: var(--primary-color);
  transform: translateY(-2px);
}

.pricing-card.featured .btn-pricing {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
}

.pricing-card.featured .btn-pricing:hover {
  background: transparent;
  color: var(--secondary-color);
}

/* ========================================
   FAQ Section
   ======================================== */
#faq {
  background: var(--bg-light);
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question i {
  font-size: 1.25rem;
  color: var(--primary-color);
  transition: var(--transition);
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-md) var(--spacing-sm);
  color: var(--text-gray);
  line-height: 1.8;
}

/* ========================================
   Contact Section
   ======================================== */
#contact {
  background: var(--bg-white);
}

.contact-info {
  background: var(--bg-light);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  text-align: center;
  height: 100%;
  transition: var(--transition);
}

.contact-info:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.contact-info .icon {
  width: 60px;
  height: 60px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
  font-size: 1.5rem;
  color: #fff;
}

.contact-info h4 {
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
  font-size: 1.25rem;
}

.contact-info p {
  color: var(--text-gray);
  margin-bottom: 0;
}

.contact-form {
  background: var(--bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-form .form-control {
  border: 2px solid #e2e8f0;
  padding: 0.875rem 1rem;
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

.contact-form .form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
}

.contact-form textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-form .btn-submit {
  background: var(--primary-color);
  color: #fff;
  padding: 1rem 3rem;
  border-radius: 50px;
  font-weight: 600;
  border: 2px solid var(--primary-color);
  transition: var(--transition);
  cursor: pointer;
}

.contact-form .btn-submit:hover {
  background: transparent;
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* ========================================
   Footer
   ======================================== */
#footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

#footer h4 {
  color: #fff;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

#footer p {
  font-size: 0.95rem;
  line-height: 1.8;
}

#footer ul {
  list-style: none;
  padding: 0;
}

#footer ul li {
  margin-bottom: 0.5rem;
}

#footer ul li a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

#footer ul li a:hover {
  color: var(--primary-light);
  padding-left: 5px;
}

#footer ul li a i {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: var(--spacing-sm);
}

.social-links a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Botón Back to Top
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
  color: #fff;
}

/* ========================================
   Utilidades
   ======================================== */
.bg-light {
  background: var(--bg-light) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  margin: var(--spacing-lg) 0;
}

/* Animaciones de Scroll */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Media Queries Adicionales
   ======================================== */

/* Tablets */
@media (max-width: 991px) {
  section {
    padding: var(--spacing-lg) 0;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .pricing-card.featured {
    transform: scale(1);
    margin-top: 0;
  }
}

/* Móviles */
@media (max-width: 576px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .section-title h2 {
    font-size: 1.75rem;
  }
  
  .section-title p {
    font-size: 1rem;
  }
  
  .service-card,
  .feature-box,
  .pricing-card {
    margin-bottom: 1.5rem;
  }
  
  .contact-form {
    padding: var(--spacing-md);
  }
  
  #footer h4 {
    font-size: 1.125rem;
    margin-top: var(--spacing-sm);
  }
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}