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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #2E7D32 0%, #4CAF50 25%, #81C784 50%, #A5D6A7 75%, #C8E6C9 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Animación de fondo con partículas */
.bg-animation {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float 8s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Contenedor principal */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 25px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    padding: 50px 40px;
    width: 450px;
    max-width: 90vw;
    position: relative;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transform: translateY(-10px);
    animation: slideIn 0.8s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Header con logo */
.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.logo-container {
    width: 270px;
    height: 150px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #A5D6A7, #3fb945);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 15px 30px rgba(76, 175, 80, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 15px 30px rgba(76, 175, 80, 0.4);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 20px 40px rgba(76, 175, 80, 0.6);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 15px 30px rgba(76, 175, 80, 0.4);
    }
}

.logo-placeholder {
    color: white;
    font-size: 24px;
    font-weight: bold;
}

.system-title {
    font-size: 28px;
    font-weight: 700;
    color: #2E7D32;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #2E7D32, #4CAF50);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.system-subtitle {
    color: #666;
    font-size: 16px;
    margin-bottom: 10px;
}

/* Formulario */
.login-form {
    display: flex;
    flex-direction: column;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-field {
    width: 100%;
    padding: 18px 25px 18px 55px;
    border: 2px solid #E0E0E0;
    border-radius: 15px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    outline: none;
}

    .input-field:focus {
        border-color: #4CAF50;
        box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
        transform: translateY(-2px);
    }

.input-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #4CAF50;
    font-size: 20px;
    transition: all 0.3s ease;
}

.input-field:focus + .input-icon {
    color: #2E7D32;
    transform: translateY(-50%) scale(1.1);
}

/* Botón de login */
.login-btn {
    background: linear-gradient(135deg, #4CAF50 0%, #2E7D32 100%);
    color: white;
    border: none;
    padding: 18px;
    border-radius: 15px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

    .login-btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
        transition: left 0.5s ease;
    }

    .login-btn:hover::before {
        left: 100%;
    }

    .login-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 30px rgba(76, 175, 80, 0.4);
    }

    .login-btn:active {
        transform: translateY(-1px);
    }

/* Enlaces adicionales */
.login-footer {
    margin-top: 30px;
    text-align: center;
}

.forgot-password {
    color: #4CAF50;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

    .forgot-password:hover {
        color: #2E7D32;
        text-decoration: underline;
    }

/* Efectos de carga */
.loading {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner {
    width: 25px;
    height: 25px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 25px;
        margin: 20px;
    }

    .system-title {
        font-size: 24px;
    }

    .input-field {
        padding: 15px 20px 15px 50px;
        font-size: 14px;
    }

    .login-btn {
        padding: 15px;
        font-size: 16px;
    }
}

/* Iconos personalizados usando CSS */
.icon-user::before {
    content: "👤";
}

.icon-lock::before {
    content: "🔒";
}

/* Mensaje de bienvenida */
.welcome-message {
    background: linear-gradient(135deg, #E8F5E8, #F1F8E9);
    border-left: 4px solid #4CAF50;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 25px;
    color: #2E7D32;
    font-size: 14px;
}
.error-message {
    background: linear-gradient(135deg, #fa4040, #be0000);
    border-left: 4px solid #fc7373;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 25px;
    color: #f8e7e7;
    font-size: 14px;
}