body {
    background: linear-gradient(135deg, var(--app-primary-soft) 0%, var(--app-primary-soft) 100%); /* Using app-primary-soft for a lighter background */
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.login-card {
    backdrop-filter: blur(10px);
    background: var(--app-surface); /* Using app-surface for card background */
    border: none;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 3rem; /* Increased padding for more breathing room */
    width: 100%;
    max-width: 450px;
    animation: fadeIn 0.8s ease-out;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.login-card .card-title {
    font-size: 2.2rem; /* Slightly larger title */
    font-weight: 700;
    color: var(--app-text); /* Use app-text for title color */
    margin-bottom: 1.8rem; /* Increased margin for better separation */
    text-align: center;
}

.form-control {
    border-radius: 10px;
    padding: 0.85rem 1rem; /* Slightly more padding */
    border: 1px solid var(--app-border); /* Use app-border */
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-size: 1rem; /* Consistent font size */
    color: var(--app-text); /* Ensure text color is consistent */
}

.form-control:focus {
    border-color: var(--app-primary); /* Use app-primary */
    box-shadow: 0 0 0 0.15rem var(--app-primary-soft); /* Softer focus ring */
}

.input-group-text {
    background-color: var(--app-surface-2); /* Use app-surface-2 */
    border-radius: 10px 0 0 10px;
    border: 1px solid var(--app-border); /* Use app-border */
    border-right: none;
    color: var(--app-text-dim); /* Use app-text-dim */
}

.btn-primary {
    background: linear-gradient(45deg, var(--app-primary) 0%, var(--app-primary-strong) 100%); /* Use app-primary for gradient */
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--app-primary-soft); /* Use app-primary-soft for button shadow */
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--app-primary-strong); /* Darker shadow on hover */
    background: linear-gradient(45deg, var(--app-primary-strong) 0%, var(--app-primary) 100%); /* Reverse gradient on hover */
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px var(--app-primary-soft); /* Lighter shadow on active */
}

.text-danger {
    font-size: 0.85rem; /* Consistent error message size */
    color: var(--app-danger); /* Use app-danger for errors for better visibility */
    margin-top: 0.25rem;
}

.form-check-label {
    font-size: 0.9rem; /* Slightly smaller for secondary text */
    color: var(--app-text-dim); /* Use dim text for labels */
}

.form-check-input:checked {
    background-color: var(--app-primary); /* Use app-primary */
    border-color: var(--app-primary); /* Use app-primary */
}

.password-toggle {
    cursor: pointer;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    color: var(--app-text-dim); /* Use app-text-dim */
}

.password-toggle:hover {
    color: var(--app-text); /* Use app-text */
}

.form-group {
    position: relative;
    margin-bottom: 1.8rem; /* Increased margin for better spacing between form groups */
}

.loading-spinner {
    display: none;
    margin-left: 10px;
}

.loading-spinner.show {
    display: inline-block;
}

@@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}