/* Importar fuentes modernas */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Variables CSS para consistencia */
:root {
    --primary-dark: #0a0a0a;
    --secondary-dark: #1a1a1a;
    --accent-dark: #2a2a2a;
    --primary-blue: #2563eb;
    --accent-blue: #1d4ed8;
    --light-blue: #3b82f6;
    --purple-accent: #6366f1;
    --gradient-primary: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e1b4b 100%);
    --gradient-secondary: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #6366f1 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --text-light: #f8fafc;
    --text-gray: #64748b;
    --text-dark: #1e293b;
    --bg-light: #0f172a;
    --bg-card: #1e293b;
    --bg-card-light: #334155;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 25px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.3);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-bg: rgba(30, 41, 59, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* Reseteo moderno */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-light);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    position: relative;
}

/* Fondo animado */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(29, 78, 216, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Estilos del contenedor principal */
main {
    width: 100%;
    max-width: 500px;
    margin: 40px auto;
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

main::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.02), transparent);
    pointer-events: none;
}

main:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-2px);
    border-color: rgba(37, 99, 235, 0.3);
}

/* Títulos */
main h1 {
    text-align: center;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    font-weight: 700;
    font-size: 28px;
    letter-spacing: -0.025em;
    position: relative;
    z-index: 1;
}

/* Párrafo descriptivo */
main p {
    text-align: center;
    margin-bottom: 30px;
    color: rgba(248, 250, 252, 0.8);
    font-size: 14px;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* Etiquetas */
main label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    margin-left: 5px;
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    opacity: 0.9;
}

/* Inputs y selects */
main input, 
main select {
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-sizing: border-box;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    backdrop-filter: blur(10px);
}

main input::placeholder {
    color: rgba(248, 250, 252, 0.5);
}

main input:focus, 
main select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), 0 0 20px rgba(37, 99, 235, 0.2);
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
}

/* Estilos específicos para el select de entidades */
#entidad {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 50px;
    cursor: pointer;
}

/* Estilos para las opciones del dropdown */
#entidad option {
    background: var(--bg-card);
    color: var(--text-light);
    padding: 12px 16px;
    border: none;
}

#entidad option:hover {
    background: var(--bg-card-light);
}

#entidad option:checked,
#entidad option:focus {
    background: var(--primary-blue);
    color: var(--text-light);
}

/* Focus específico para el select */
#entidad:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), 0 0 20px rgba(37, 99, 235, 0.2);
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
}

/* Contenedor de contraseña */
.password-container {
    position: relative;
    display: flex;
    align-items: center;
}

.password-container #clave {
    padding-right: 50px;
}

#togglePassword {
    position: absolute;
    right: 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: rgba(248, 250, 252, 0.7);
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    top: 50%;
    transform: translateY(-60%);
}

#togglePassword:hover {
    color: var(--primary-blue);
    transform: translateY(-60%) scale(1.1);
}

#togglePassword i {
    font-size: 14px;
}

/* Botones */
main button {
    width: 100%;
    padding: 18px 24px;
    background: var(--gradient-secondary);
    color: var(--text-light);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

main button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

main button:hover::before {
    left: 100%;
}

main button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 35px rgba(37, 99, 235, 0.4);
}

main button:active {
    transform: translateY(-1px) scale(0.98);
}

main button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Formulario */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    position: relative;
    z-index: 1;
}

/* Sección de autenticación */
.auth-section h2 {
    text-align: center;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    font-size: 20px;
    position: relative;
}

.auth-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    width: 60px;
    height: 2px;
    background: var(--gradient-secondary);
    transform: translateX(-50%);
    border-radius: 1px;
}

/* Loading overlay */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: 'Inter', sans-serif;
    color: var(--text-light);
    font-size: 18px;
    font-weight: 500;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
}

footer .logo-firma {
    max-width: 300px;
    height: auto;
    transition: var(--transition);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    border-radius: 8px;
}

footer .logo-firma:hover {
    transform: scale(1.05) rotate(1deg);
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.4));
}

/* Mejoras para la navegación responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 25px;
        justify-content: center;
    }
    
    .nav-logo {
        margin-right: 0;
    }
    
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: none;
    }

    main {
        padding: 30px 25px;
        margin: 20px 15px;
        max-width: calc(100% - 30px);
    }

    main h1 {
        font-size: 24px;
    }

    main input, 
    main select {
        padding: 14px 16px;
        font-size: 16px;
    }

    main button {
        padding: 16px 20px;
        font-size: 15px;
    }

    #entidad {
        background-position: right 12px center;
        padding-right: 40px;
    }
}

@media (max-width: 480px) {
    main {
        padding: 25px 20px;
        margin: 15px 10px;
    }

    main h1 {
        font-size: 22px;
    }

    .auth-section h2 {
        font-size: 18px;
    }
}

@media (min-width: 768px) and (max-width: 1200px) {
    main {
        max-width: 450px;
    }
}

@media (min-width: 1200px) {
    main {
        max-width: 500px;
    }
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Efectos de partículas sutil */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

main {
    animation: float 6s ease-in-out infinite;
}