.login-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 2.5rem;
    margin-top: 2rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h3 {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.form-floating {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #6c757d;
    z-index: 10;
    padding: 5px;
}

.password-toggle:hover {
    color: #495057;
}

.btn-login {
    width: 100%;
    padding: 0.75rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 1rem;
    display: none;
    animation: slideDown 0.3s ease;
}

.error-message.show {
    display: block;
}

.error-message .close-btn {
    float: right;
    cursor: pointer;
    font-weight: bold;
    color: #721c24;
    opacity: 0.7;
}

.error-message .close-btn:hover {
    opacity: 1;
}

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

.form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.invalid-feedback {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.user-header-sleek {
    background: #ffffff;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.sleek-welcome {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-greeting {
    font-size: 1.5rem;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.user-display-name {
    font-size: 0.95rem;
    color: #2c3e50;
    font-weight: 600;
}

.user-ip {
    font-size: 0.7rem;
    color: #95a5a6;
}

.user-quick-actions {
    display: flex;
    gap: 0.5rem;
}

.quick-action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1.2rem;
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    transition: all 0.2s ease;
    cursor: pointer;
}

.quick-action-btn:hover {
    background: #e9ecef;
    transform: scale(1.05);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.logout-btn:hover {
    background: #ffe0e0;
    border-color: #ffcdd2;
}

@media (max-width: 768px) {
    .sleek-welcome {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .user-quick-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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