/* =========================================
   VARIABLES Y CONFIGURACIÓN GLOBAL
   ========================================= */
   :root {
    --color-wine: #8b0d32;
    --color-wine-light: #a82244;
    --color-wine-dark: #6e0927;
    --color-gold: #daa520;
    --color-gold-light: #f0c14b;
    --color-gold-dark: #b7861a;
    --color-navy: #001f3f;
    --color-navy-light: #0e3a6b;
    --color-navy-dark: #001428;
    --color-white: #ffffff;
    --color-light-gray: #f5f5f5;
    --color-gray: #e0e0e0;
    --color-dark-gray: #333333;
  
    --font-primary: "Helvetica Neue", Arial, sans-serif;
    --font-secondary: "Georgia", serif;
  
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
    --border-radius-full: 9999px;
  
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
  }
  
  /* =========================================
     RESET Y ESTILOS BASE
     ========================================= */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
  }
  
  body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-dark-gray);
    overflow-x: hidden;
    background-color: var(--color-light-gray);
  }
  
  img {
    max-width: 100%;
    height: auto;
  }
  
  a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
  }
  
  ul,
  ol {
    list-style-type: none;
  }
  
  .container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
  }
  
  /* =========================================
     HEADER Y NAVEGACIÓN
     ========================================= */
  .header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }
  
  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    height: 80px;
  }
  
  .logo {
    display: flex;
    align-items: center;
  }
  
  .logo img {
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
  }
  
  .logo:hover img {
    transform: scale(1.02);
  }
  
  /* Menú horizontal principal */
  .menu-horizontal {
    display: flex;
    gap: 2.5rem;
    align-items: center;
  }
  
  .menu-horizontal li {
    position: relative;
  }
  
  .nav-link {
    color: var(--color-navy);
    font-weight: 600;
    padding: 0.75rem 1rem;
    display: block;
    position: relative;
    border-radius: var(--border-radius-sm);
  }
  
  .nav-link::after {
    content: "";
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--color-wine);
    transition: var(--transition-normal);
  }
  
  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
    left: 0;
  }
  
  .nav-link:hover,
  .nav-link.active {
    color: var(--color-wine);
  }
  
  /* Menú vertical desplegable */
  .menu-vertical {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    width: 240px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .menu-horizontal li:hover .menu-vertical {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  
  .menu-vertical > li > a {
    color: var(--color-navy);
    padding: 0.75rem 1.5rem;
    display: block;
    font-weight: 500;
    transition: var(--transition-normal);
    border-radius: var(--border-radius-sm);
    position: relative;
  }
  
  .menu-vertical > li > a:hover {
    background-color: var(--color-light-gray);
    color: var(--color-wine);
    padding-left: 1.75rem;
  }
  
  /* Submenú */
  .submenu {
    position: absolute;
    left: 100%;
    top: 0;
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    width: 320px;
    max-height: 80vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(10px);
  }
  
  .menu-vertical li:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }
  
  .submenu::-webkit-scrollbar {
    width: 8px;
  }
  
  .submenu::-webkit-scrollbar-track {
    background: var(--color-light-gray);
    border-radius: 4px;
  }
  
  .submenu::-webkit-scrollbar-thumb {
    background: var(--color-navy);
    border-radius: 4px;
  }
  
  .submenu li a {
    color: var(--color-navy);
    padding: 0.75rem 1.5rem;
    display: block;
    transition: var(--transition-normal);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
  }
  
  .submenu li a:hover {
    background-color: var(--color-light-gray);
    color: var(--color-wine);
    padding-left: 1.75rem;
  }
  
  /* Botón de inicio de sesión */
  .btn-login {
    background-color: var(--color-wine);
    color: var(--color-white);
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(139, 13, 50, 0.2);
    transition: var(--transition-normal);
  }
  
  .btn-login:hover {
    background-color: var(--color-wine-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 31, 63, 0.25);
  }
  
  /* Botón de menú móvil */
  .menu-toggle {
    display: none;
    background-color: var(--color-wine);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius-full);
    width: 50px;
    height: 50px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 2000;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
  }
  
  .menu-toggle:hover {
    background-color: var(--color-wine-dark);
  }
  
  /* Form styles */
  .form-container {
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    margin: 120px auto 40px;
    max-width: 800px;
    animation: fadeIn 0.8s ease-out forwards;
  }
  
  .form-title {
    text-align: center;
    color: var(--color-navy);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    font-weight: 700;
  }
  
  .form-subtitle {
    color: var(--color-wine);
    margin-bottom: 1.5rem;
    margin-top: 2rem;
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: 2px solid var(--color-gray);
    padding-bottom: 0.75rem;
  }
  
  .form-group {
    margin-bottom: 1.5rem;
  }
  
  .form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-dark-gray);
  }
  
  .form-input, 
  .form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--color-gray);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition-normal);
    font-family: var(--font-primary);
  }
  
  .form-input:focus, 
  .form-select:focus {
    border-color: var(--color-navy);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 31, 63, 0.1);
  }
  
  .form-row {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
  }
  
  .form-col {
    flex: 1;
  }
  
  .optional-label {
    font-size: 0.875rem;
    color: #757575;
    margin-left: 0.3125rem;
  }
  
  .btn-submit {
    background-color: var(--color-wine);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius-full);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: block;
    margin: 2rem auto 0;
    transition: var(--transition-normal);
    box-shadow: 0 4px 12px rgba(139, 13, 50, 0.2);
  }
  
  .btn-submit:hover {
    background-color: var(--color-wine-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(139, 13, 50, 0.3);
  }
  
  .btn-reset {
    background: transparent;
    color: var(--color-dark-gray);
    border: 1px solid var(--color-gray);
    border-radius: var(--border-radius-full);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: block;
    margin: 1rem auto 0;
    transition: var(--transition-normal);
  }
  
  .btn-reset:hover {
    background-color: var(--color-light-gray);
    color: var(--color-navy);
    border-color: var(--color-navy-light);
  }
  
  .required-label {
    color: var(--color-wine);
  }
  
  .form-select-academic {
    margin-bottom: 1.25rem;
  }
  
  .form-options {
    margin-top: 1.25rem;
    display: none;
    animation: fadeIn 0.4s ease forwards;
  }
  
  .active {
    display: block;
  }
  
  @media (max-width: 768px) {
    /* Menú móvil */
    .menu-toggle {
      display: flex;
      position: fixed;
      top: 20px;
      right: 20px;
    }
  
    .menu-horizontal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background-color: white;
      padding: 80px 20px 20px;
      overflow-y: auto;
      z-index: 1900;
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
    }
  
    .menu-horizontal.active {
      display: block;
      animation: slideIn 0.3s ease-out;
    }
  
    @keyframes slideIn {
      from {
        transform: translateX(-100%);
        opacity: 0;
      }
      to {
        transform: translateX(0);
        opacity: 1;
      }
    }
  
    .menu-horizontal > li {
      width: 100%;
      margin: 0;
      border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }
  
    .menu-horizontal > li > a {
      padding: 15px;
      font-size: 18px;
    }
  
    .menu-vertical {
      position: static;
      width: 100%;
      opacity: 1;
      visibility: visible;
      box-shadow: none;
      padding: 0;
      margin: 10px 0;
      display: none;
      background-color: #f8f9fa;
      border-radius: 8px;
      transform: none;
    }
  
    .menu-vertical.active {
      display: block;
    }
  
    .menu-vertical > li > a {
      padding: 12px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
  
    .menu-vertical > li > a::after {
      content: "›";
      font-size: 20px;
      transition: transform 0.3s ease;
    }
  
    .menu-vertical > li > a.active::after {
      transform: rotate(90deg);
    }
  
    .submenu {
      position: static;
      width: 100%;
      opacity: 1;
      visibility: visible;
      box-shadow: none;
      background-color: #eef1f5;
      padding: 5px 0;
      margin: 0;
      display: none;
      border-radius: 8px;
      transform: none;
    }
  
    .submenu.active {
      display: block;
    }
  
    .btn-login {
      margin: 20px 0;
      width: 100%;
      justify-content: center;
    }
    
    .form-row {
      flex-direction: column;
      gap: 1rem;
    }
    
    .form-container {
      padding: 1.5rem;
      margin-top: 100px;
    }
  }

  /* =========================================
     ANIMACIONES Y EFECTOS
     ========================================= */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .fade-in {
    animation: fadeIn 0.8s ease-out forwards;
  }
  
  /* Mejoras de rendimiento */
  * {
    -webkit-tap-highlight-color: transparent;
  }
  
  /* Mejoras de accesibilidad */
  .nav-link,
  .btn-submit,
  .btn-reset,
  .btn-login {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
  }