@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

#preloader {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.7s ease-out, visibility 0.7s ease-out;
}
#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}
#preloader .logo-loader {
    max-width: 100px;
    animation: pulse 1.8s infinite ease-in-out;
}

body.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(-45deg, #f8f9fa, #ffffff, #fef5f5, #f8f9fa);
    background-size: 400% 400%;
    animation: gradient-animation 15s ease infinite;
    opacity: 0;
    transition: opacity 0.5s ease-in;
}
body.loaded {
    opacity: 1;
}

.login-container {
    display: grid;
    grid-template-columns: 45% 55%;
    width: 100%;
    max-width: 1100px;
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 1rem;
    overflow: hidden;
}
.login-branding-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}
.branding-content { 
    text-align: center; 
    animation: fadeIn 1s ease-in-out .5s backwards;
}
.branding-logo { max-width: 120px; margin-bottom: 2rem; }
.branding-title { font-size: 2rem; font-weight: 800; color: #1e293b; }
.branding-subtitle { font-size: 1.1rem; color: #64748b; margin-top: 0.5rem; }
.login-form-panel { 
    padding: 3rem 2.5rem; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    background-color: rgba(255,255,255,0.5);
}
.form-wrapper { width: 100%; max-width: 400px; }
.form-title { font-size: 1.75rem; font-weight: 700; color: #1e293b; margin-bottom: 0.5rem; }
.form-subtitle { color: #64748b; margin-bottom: 2.5rem; }

.form-floating-group {
    position: relative;
    margin-bottom: 1.75rem;
}
.form-floating-group .form-control {
    height: 50px;
    padding: 10px;
    background-color: rgba(255,255,255,0.7);
    border: 1px solid #ced4da;
}
.form-floating-group .form-label {
    position: absolute;
    top: 15px;
    left: 10px;
    font-size: 1rem;
    color: #6c757d;
    pointer-events: none;
    transition: all 0.2s ease-out;
}
.form-floating-group .form-control:focus {
    background-color: white;
}
.form-floating-group .form-control:focus ~ .form-label,
.form-floating-group .form-control:not(:placeholder-shown) ~ .form-label {
    top: -10px;
    left: 8px;
    font-size: 0.75rem;
    color: var(--primary-red);
    background-color: white;
    padding: 0 4px;
}
.password-wrapper { position: relative; }
.password-toggle-btn {
    position: absolute;
    top: 50%;
    right: 1px;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    padding: 0.75rem;
    z-index: 3;
}

@media (max-width: 992px) {
    body.login-page {
        align-items: flex-start;
        padding-top: 3rem;
    }
    .login-container {
        grid-template-columns: 1fr;
        max-width: 450px;
    }
    .login-branding-panel {
        padding: 2rem 1.5rem;
        align-items: normal;
    }
}