/* =============================================
   CSS OPTIMIZADO - SIADO
   Versión con esquema de colores AZUL
   Solo 3 secciones: Inicio, Ingresar, Descargar
   ============================================= */

/* Variables CSS - Definir una sola vez, usar en todas partes */
:root {
    /* Colores principales - AZUL */
    --primary-blue: #3b82f6;
    --primary-blue-dark: #2563eb;
    --primary-blue-light: #70b3ff;
    --accent-blue: #1d4ed8;
    --text-white: #ffffff;
    --text-gray: #e5e7eb;
    --text-light: #d1d5db;
    --text-muted: #9ca3af;
    --text-dark: #6b7280;
    
    /* Fondos */
    --bg-dark: rgba(0, 0, 0, 0.3);
    --bg-glass: rgba(255, 255, 255, 0.1);
    --bg-overlay: rgba(0, 0, 0, 0.35);
    --bg-overlay-dark: rgba(0, 0, 0, 0.65);
    
    /* Bordes y efectos */
    --border-glass: rgba(255, 255, 255, 0.2);
    --border-glass-strong: rgba(255, 255, 255, 0.3);
    
    /* Espaciado */
    --padding-sm: 8px;
    --padding-base: 15px;
    --padding-lg: 25px;
    --padding-xl: 50px;
    
    /* Border radius */
    --radius-sm: 10px;
    --radius-base: 12px;
    --radius-lg: 15px;
    --radius-xl: 25px;
    
    /* Transiciones */
    --transition-fast: all 0.2s ease;
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.4s ease;
    --transition-cubic: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Sombras - ACTUALIZADAS CON AZUL */
    --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.2);
    --shadow-base: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.3);
    --shadow-blue: 0 8px 25px rgba(59, 130, 246, 0.4);
  }
  
  /* Reset y configuración base */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-white);
    overflow-x: hidden;
  }
  
  body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    background-attachment: fixed;
  }
  
  /* =============================================
     CLASES UTILITARIAS REUTILIZABLES
     ============================================= */
  
  /* Efecto cristal - usar en lugar de repetir el código */
  .glass-effect {
    background: var(--bg-glass);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-base);
  }
  
  /* Fondos de secciones - elimina repetición */
  .section-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.30;
  }
  
  .section-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
  }
  
  /* Botones base - elimina duplicación */
  .btn-base {
    padding: var(--padding-base);
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    display: inline-block;
    border-radius: var(--radius-base);
  }
  
  .btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: #ffffff;
    padding: var(--padding-base) 30px;
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    border: none;
  }
  
  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-blue);
    transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Inputs base - consolida todos los estilos de input */
  .input-base {
    width: 100%;
    padding: var(--padding-base);
    background: var(--bg-dark);
    border: 1px solid var(--border-glass-strong);
    border-radius: var(--radius-base);
    color: var(--text-white);
    font-size: 1rem;
    transition: var(--transition-base);
  }
  
  .input-base:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  }
  
  .input-base::placeholder {
    color: var(--text-muted);
  }
  
  /* Fix autocompletado - aplicar a todos los inputs */
  .input-base:-webkit-autofill,
  .input-base:-webkit-autofill:hover,
  .input-base:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 30px var(--bg-dark) inset !important;
    -webkit-text-fill-color: var(--text-white) !important;
    transition: background-color 5000s ease-in-out 0s !important;
  }
  
  .input-base:-webkit-autofill:focus {
    border-color: var(--primary-blue) !important;
    box-shadow: 0 0 0 30px var(--bg-dark) inset, 0 0 0 3px rgba(59, 130, 246, 0.1) !important;
  }
  
  /* =============================================
     NAVEGACIÓN
     ============================================= */
  .navbar {
    position: fixed;
    top: 20px;
    right: 40px;
    z-index: 1000;
    padding: 5px 15px;
    border-radius: var(--radius-sm);
  }
  
  .nav-list {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
  }
  
  .nav-item {
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    padding: 5px 0;
    position: relative;
    transition: var(--transition-base);
    color: var(--text-white);
    text-decoration: none;
    display: block;
  }
  
  .nav-item:hover {
    color: var(--primary-blue-light);
    transform: translateY(-2px);
  }
  
  .nav-item.active {
    color: var(--primary-blue-light);
  }
  
  .nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue-light));
    transition: var(--transition-base);
    transform: translateX(-50%);
  }
  
  .nav-item:hover::before,
  .nav-item.active::before {
    width: 100%;
  }
  
  /* =============================================
     SISTEMA DUAL DE NAVEGACIÓN
     ============================================= */
  .main-container {
    position: relative;
    min-height: 100vh;
    padding-bottom: 80px;
  }
  
  .section {
    position: relative;
    width: 100%;
    min-height: 100vh;
    opacity: 1;
    transform: none;
    transition: var(--transition-cubic);
    z-index: 1;
  }
  
  .main-container.app-mode {
    overflow: hidden;
    height: 100vh;
  }
  
  .main-container.app-mode .section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100vh;
    opacity: 0;
    transform: translateX(100%);
    transition: var(--transition-cubic);
    z-index: 1;
  }
  
  .main-container.app-mode .section.active {
    opacity: 1;
    transform: translateX(0);
    z-index: 2;
  }
  
  /* =============================================
     SECCIÓN INICIO
     ============================================= */
  .hero-section {
    background-image: url('imagenes/fondo2.jpeg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
  }
  
  .hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay-dark);
  }
  
  .hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    padding: 0 20px;
  }
  
  .hero-title {
    font-size: 3.6rem;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
  }
  
  .hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-gray);
    animation: fadeInUp 1s ease-out 0.2s both;
  }
  
  .highlight-text {
    color: var(--primary-blue-light);
  }
  
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 50px;
    padding: 0 20px;
  }
  
  .stat-card {
    padding: var(--padding-lg);
    text-align: center;
    transition: var(--transition-base);
    animation: float 3s ease-in-out infinite;
    border-radius: var(--radius-lg);
  }
  
  .stat-card:nth-child(1) { animation-delay: 0s; }
  .stat-card:nth-child(2) { animation-delay: 0.5s; }
  .stat-card:nth-child(3) { animation-delay: 1s; }
  .stat-card:nth-child(4) { animation-delay: 1.5s; }
  
  .stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(59, 130, 246, 0.2);
  }
  
  .stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-blue-light);
    display: block;
  }
  
  .stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 5px;
  }
  
  /* =============================================
     SECCIÓN LOGIN
     ============================================= */
  .login-section {
    padding: 100px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 100vh;
  }
  
  .login-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('imagenes/fondo9.jpeg');
    background-size: cover;
    background-position: center;
    opacity: 0.30;
  }
  
  .login-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
  }
  
  .login-form {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 460px;
    border-radius: var(--radius-xl);
    padding: var(--padding-xl);
    box-shadow: var(--shadow-lg);
  }
  
  .logo-container {
    text-align: center;
    margin-bottom: 20px;
  }
  
  .login-logo {
    width: 80px;
    height: auto;
    display: block;
    margin: 0 auto 10px;
  }
  
  .login-form h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-blue-light);
    text-align: center;
    margin-bottom: 5px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  }
  
  .login-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 25px;
  }
  
  .form-group {
    margin-bottom: 15px;
  }
  
  .form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-gray);
    margin-bottom: 8px;
  }
  
  .password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }
  
  .password-wrapper input {
    padding-right: 45px !important;
  }
  
  .toggle-password-icon {
    position: absolute;
    right: 12px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.3s ease;
  }
  
  .toggle-password-icon:hover {
    opacity: 1;
  }
  
  .btn-login {
    width: 100%;
    padding: var(--padding-base);
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-base);
    margin-bottom: 15px;
  }
  
  .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
  }
  
  .register-link {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
  }
  
  .register-link a {
    color: var(--primary-blue-light);
    text-decoration: none;
    font-weight: bold;
  }
  
  .register-link a:hover {
    color: var(--primary-blue);
  }
  
  /* Mensaje de alerta */
  .mensaje-alerta {
    background: rgba(239, 68, 68, 0.9);
    color: white;
    padding: 12px;
    border-radius: var(--radius-base);
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
  }
  
  /* =============================================
     SECCIÓN DESCARGAR
     ============================================= */
  .download-section {
    padding: 100px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 100vh;
    text-align: center;
  }
  
  .download-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('imagenes/fondo7.jpeg');
    background-size: cover;
    background-position: center;
    opacity: 0.30;
    z-index: 1;
  }
  
  .download-section::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    z-index: 2;
  }
  
  .download-content {
    position: relative;
    z-index: 3;
    max-width: 900px;
    padding: var(--padding-xl);
    border-radius: var(--radius-xl);
    animation: fadeInUp 1s ease-out;
  }
  
  .download-content h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-blue-light);
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  }
  
  .download-content p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 40px;
  }
  
  .download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 50px;
  }
  
  .btn-download {
    padding: var(--padding-base) 30px;
    border-radius: var(--radius-base);
    font-size: 1.1rem;
    text-decoration: none;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
    border: none;
    font-weight: bold;
  }
  
  .btn-download.windows {
    background: linear-gradient(135deg, #0078d7, #03487c);
    color: var(--text-white);
  }
  
  .btn-download.android {
    background: linear-gradient(135deg, #23b34e, #036e27);
    color: var(--text-white);
    cursor: pointer;
  }
  
  .btn-download:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-blue);
  }
  
  /* Información de características */
  .download-info {
    margin-top: 40px;
  }
  
  .download-info h3 {
    font-size: 1.8rem;
    color: var(--primary-blue-light);
    margin-bottom: 30px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
  }
  
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
  }
  
  .feature-item {
    padding: 20px;
    border-radius: var(--radius-base);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  
  .feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
    border-color: var(--primary-blue);
  }
  
  .feature-item i {
    font-size: 2rem;
    color: var(--primary-blue-light);
  }
  
  .feature-item span {
    font-size: 0.95rem;
    color: var(--text-gray);
    font-weight: 600;
  }
  
  /* =============================================
     FOOTER
     ============================================= */
  .footer-fixed {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: #0f172a;
    color: var(--text-gray);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 15px;
    font-size: 14px;
    z-index: 1000;
    border-top: 1px solid var(--border-glass);
  }
  
  .footer-fixed .footer-icons {
    display: flex;
    gap: 20px;
    margin-bottom: 5px;
  }
  
  .footer-fixed .footer-icons a {
    color: var(--primary-blue-light);
    font-size: 18px;
    transition: var(--transition-base);
  }
  
  .footer-fixed .footer-icons a:hover {
    color: var(--primary-blue);
    transform: translateY(-3px);
  }
  
  .footer-fixed p {
    margin: 0;
    font-size: 12px;
    color: var(--text-muted);
  }
  
  /* =============================================
     APLICAR CLASES REUTILIZABLES
     ============================================= */
  
  /* Aplicar efecto cristal */
  .navbar,
  .login-form,
  .stat-card,
  .download-content {
    background: var(--bg-glass);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-base);
  }
  
  /* Aplicar estilos base a inputs */
  .form-group input {
    width: 100%;
    padding: var(--padding-base);
    background: var(--bg-dark);
    border: 1px solid var(--border-glass-strong);
    border-radius: var(--radius-base);
    color: var(--text-white);
    font-size: 1rem;
    transition: var(--transition-base);
  }
  
  .form-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  }
  
  .form-group input::placeholder {
    color: var(--text-muted);
  }
  
  /* Fix autocompletado mejorado */
  .form-group input:-webkit-autofill,
  .form-group input:-webkit-autofill:hover,
  .form-group input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 30px var(--bg-dark) inset !important;
    -webkit-text-fill-color: var(--text-white) !important;
    transition: background-color 5000s ease-in-out 0s !important;
  }
  
  .form-group input:-webkit-autofill:focus {
    border-color: var(--primary-blue) !important;
    box-shadow: 0 0 0 30px var(--bg-dark) inset, 0 0 0 3px rgba(59, 130, 246, 0.1) !important;
  }
  
  /* Animaciones */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  @keyframes float {
    0%, 100% {
      transform: translateY(0px);
    }
    50% {
      transform: translateY(-10px);
    }
  }
  
  /* =============================================
     RESPONSIVE DESIGN
     ============================================= */
  @media (max-width: 768px) {
    .navbar {
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      right: auto;
      align-items: center;
      padding: 5px 10px;
    }
    
    .nav-list {
      gap: 15px;
    }
    
    .nav-item {
      font-size: 12px;
      padding: 5px 0;
    }
    
    .hero-title {
      font-size: 2.5rem;
    }
    
    .hero-subtitle {
      font-size: 1.2rem;
    }
    
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .login-form {
      margin: 0 10px;
      padding: 30px 20px;
    }
  
    .login-form h2 {
      font-size: 2rem;
    }
  
    .login-logo {
      width: 65px;
    }
  
    .download-content {
      width: 90%;
      margin: 0 auto;
      padding: 30px 20px;
    }
  
    .download-content h2 {
      font-size: 2rem;
    }
  
    .features-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 15px;
    }
  
    .feature-item {
      padding: 15px;
    }
  
    .feature-item i {
      font-size: 1.5rem;
    }
  
    .feature-item span {
      font-size: 0.85rem;
    }
    
    /* Performance fix para móvil */
    .hero-section {
      background-attachment: scroll;
    }
  }
  
  @media (max-width: 420px) {
    .btn-download {
      font-size: 0.95rem;
      padding: 12px 20px;
    }
  
    .btn-login {
      font-size: 0.95rem;
    }
  
    .features-grid {
      grid-template-columns: 1fr;
    }
  }