/* === CSS Variables === */
:root {
  /* Colors */
  --primary-color: #6a1b9a;        /* Morado oscuro principal */
  --primary-color-hover: #5a148a;   /* Variante más oscura para hover */
  --secondary-color: #9c27b0;
  --secondary-color-hover: #8c17a0;
  --accent-color: #ba68c8;
  --accent-color-hover: #aa58b8;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --warning-color-hover: #ffb300;
  --info-color: #17a2b8;
  --white: #ffffff;
  --gray-light: #e9ecef;
  --gray-medium: #ced4da;
  --gray-dark: #6c757d;
  
  /* Gradients */
  --nav-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  --nav-gradient-hover: linear-gradient(135deg, var(--primary-color-hover) 0%, var(--secondary-color-hover) 100%);
  --donar-gradient: linear-gradient(135deg, var(--warning-color) 0%, #ffca28 100%);
  --donar-gradient-hover: linear-gradient(135deg, var(--warning-color-hover) 0%, #ffb300 100%);

  /* Typography */
  --font-primary: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: 'Georgia', 'Times New Roman', serif;
  --font-size-base: 1rem;
  --line-height-base: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Effects */
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
  --border-radius: 0.375rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 1rem;
}

/* Dark Mode */
[data-theme="dark"] {
  --light-color: #1e1e1e;
  --dark-color: #e0e0e0;
  --gray-light: #2c2c2c;
  --gray-medium: #4a4a4a;
  --gray-dark: #b0b0b0;
  --white: #2c2c2c;
  --primary-color: #8e24aa;
  --primary-color-hover: #7e149a;
  --secondary-color: #ab47bc;
  --secondary-color-hover: #9b37ac;
  --accent-color: #ce93d8;
  --accent-color-hover: #be83c8;
  --warning-color: #ffca28;
  --warning-color-hover: #ffba18;
}

/* === Base Styles === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--dark-color);
  background-color: var(--light-color);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
  padding-top: 1rem; /* Espacio para fixed header */
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 600;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--accent-color-hover);
  text-decoration: underline;
}

/* === Accessibility === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only-focusable:not(:focus) {
  @extend .sr-only;
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 50px;
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
}

.btn:disabled {
  opacity: 0.65;
  pointer-events: none;
}

.btn-next {
  background-color: var(--secondary-color);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.btn-next:hover {
  background-color: var(--secondary-color-hover);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-next .spinner-border {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.btn-next .btn-text {
  transition: opacity 0.3s ease;
}

.btn-next.loading .btn-text {
  opacity: 0;
}

.btn-next.loading .spinner-border {
  display: block !important;
}

.btn-hero {
  background: var(--donar-gradient);
  color: var(--dark-color);
  border: 2px solid var(--warning-color);
  padding: var(--spacing-sm) var(--spacing-xl);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.btn-hero:hover {
  background: var(--donar-gradient-hover);
  color: var(--dark-color);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow);
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.8);
  color: var(--white);
}

.btn-outline-light:hover {
  background-color: var(--warning-color);
  color: var(--dark-color);
  border-color: var(--warning-color);
}

/* === Cards === */
.card {
  border: none;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
  background-color: var(--white);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-img-top {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-title {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

/* === Formularios === */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.form-control, .form-select {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--gray-medium);
  border-radius: var(--border-radius);
  transition: var(--transition);
  background-color: var(--white);
  color: var(--dark-color);
}

.form-control:focus, .form-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.25rem rgba(186, 104, 200, 0.25);
}

.form-text, #charCount {
  display: block;
  font-size: 0.85rem;
  color: var(--gray-dark);
  margin-top: var(--spacing-xs);
}

.invalid-feedback {
  display: block;
  width: 100%;
  margin-top: var(--spacing-xs);
  font-size: 0.85rem;
  color: #dc3545;
}

.required-field::after {
  content: " *";
  color: var(--secondary-color);
}

.optional-field {
  color: var(--gray-dark);
  font-size: 0.85rem;
  font-style: italic;
}

/* === Header & Navbar === */
.header {
  background: var(--nav-gradient);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: var(--spacing-sm) 0;
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
  background: var(--nav-gradient-hover);
  backdrop-filter: blur(5px);
}

.navbar {
  padding: 0;
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--white) !important;
}

.logo {
  height: 40px;
  width: auto;
  margin-right: var(--spacing-sm);
  transition: var(--transition);
}

.navbar-brand:hover .logo {
  transform: scale(1.08);
}

.nav-item {
  margin: 0 var(--spacing-xs);
  border-radius: var(--border-radius);
}

.nav-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link {
  display: flex;
  align-items: center;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md) !important;
  color: rgba(255, 255, 255, 0.85) !important;
  position: relative;
  transition: var(--transition);
}

.nav-link:hover, .nav-link:focus {
  color: var(--white) !important;
  transform: translateY(-2px);
}

.nav-link.active {
  color: var(--white) !important;
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-md);
  right: var(--spacing-md);
  height: 2px;
  background-color: var(--accent-color);
}

.dropdown-menu {
  background-color: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: var(--spacing-xs) 0;
}

.dropdown-item {
  color: var(--dark-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  transition: var(--transition);
}

.dropdown-item:hover, .dropdown-item:focus {
  background-color: var(--gray-light);
  color: var(--secondary-color);
}

.navbar-toggler {
  border: none;
  padding: var(--spacing-sm);
  color: var(--white);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(186, 104, 200, 0.5);
}

/* === Contact Section === */
.contact-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--white);
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.95)), 
    url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48ZyBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxnIGZpbGw9IiNlZWVlZWUiIGZpbGwtb3BhY2l0eT0iMC40Ij48cGF0aCBkPSJNMCAwaDQwdjQwSDB6Ii8+PC9nPjwvZz48L3N2Zz4=');
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
  text-align: center;
  width: 100%;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--secondary-color);
  border-radius: 2px;
}

.contact-form, .contact-info {
  padding: var(--spacing-xl);
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

/* Map */
.map-container {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.map-iframe {
  width: 100%;
  height: 250px;
  border: none;
  display: block;
}

/* Contact Icons */
.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(186, 104, 200, 0.1);
  color: var(--accent-color);
  border-radius: 50%;
  margin-right: var(--spacing-sm);
  flex-shrink: 0;
}

/* === Social Links === */
.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--light-color);
  color: var(--accent-color);
  border-radius: 50%;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--accent-color);
  color: var(--white);
  transform: translateY(-3px);
  text-decoration: none;
}

/* Social Icons Fixed */
.social-icons-fixed {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 100;
}

.social-icons-fixed a {
  width: 50px;
  height: 50px;
  background-color: var(--white);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.social-icons-fixed a:hover {
  background-color: var(--secondary-color);
  color: var(--white);
  transform: translateY(-5px) scale(1.1);
}

.social-icons-fixed a::after {
  content: attr(aria-label);
  position: absolute;
  right: calc(100% + 10px);
  white-space: nowrap;
  background-color: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.social-icons-fixed a:hover::after {
  opacity: 1;
  right: calc(100% + 15px);
}

/* === Footer === */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-logo {
  height: 80px;
  width: auto;
  margin-bottom: var(--spacing-lg);
  transition: var(--transition);
}

.footer-logo:hover {
  transform: scale(1.05);
}

.footer-about {
  opacity: 0.8;
  margin-bottom: var(--spacing-lg);
}

.footer-links {
  list-style: none;
  padding-left: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--accent-color);
  transform: translateX(5px);
  text-decoration: none;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: var(--secondary-color);
  color: var(--white);
  transform: translateY(-3px);
}

.copyright {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  opacity: 0.7;
  font-size: 0.9rem;
}

/* === Modal === */
.modal-content {
  border: none;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  background-color: var(--primary-color);
  color: var(--white);
  border-bottom: none;
  padding: var(--spacing-md) var(--spacing-lg);
}

.modal-title {
  font-weight: 600;
  margin: 0;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  border-top: 1px solid var(--gray-light);
  padding: var(--spacing-md) var(--spacing-lg);
}

/* === Animations === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* === Utility Classes === */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-accent { color: var(--accent-color); }
.bg-light { background-color: var(--light-color); }
.bg-white { background-color: var(--white); }
.shadow { box-shadow: var(--shadow); }
.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.mb-0 { margin-bottom: 0 !important; }
.mt-3 { margin-top: var(--spacing-md); }

/* === Media Queries === */
@media (max-width: 1199.98px) {
  /* Large devices (desktops, less than 1200px) */
}

@media (max-width: 991.98px) {
  /* Medium devices (tablets, less than 992px) */
  .social-icons-fixed {
    display: none;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .contact-section {
    padding: var(--spacing-xl) 0;
  }
  
  .contact-form, .contact-info {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 767.98px) {
  /* Small devices (landscape phones, less than 768px) */
  .navbar-brand {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .map-iframe {
    height: 200px;
  }
  
  .footer {
    text-align: center;
  }
  
  .footer-social {
    justify-content: center;
  }
  
  .footer-links {
    margin-bottom: var(--spacing-lg);
  }
}

@media (max-width: 575.98px) {
  /* Extra small devices (portrait phones, less than 576px) */
  .section-title {
    font-size: 1.5rem;
  }
  
  .btn-next, .btn-hero {
    width: 100%;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
  }
  
  .modal-body {
    padding: var(--spacing-md);
  }
}

/* Print styles */
@media print {
  .header, .footer, .social-icons-fixed {
    display: none !important;
  }
  
  body {
    background-color: white !important;
    color: black !important;
  }
  
  a {
    color: #000 !important;
    text-decoration: underline !important;
  }
}