:root {
    --theme-color: #000000;
    --theme-color-light: #3f37c9;
    --theme-color-dark: #3f37c9;
    --theme-color-transparent: rgba(63, 55, 201, 0.1);
    --theme-color-very-light: rgba(63, 55, 201, 0.05);
    --theme-text: #333;
    --theme-border: #e1e1e1;
}

.login-section {
    min-height: 50vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--theme-color-very-light) 0%, white 100%);
    padding: 40px 0;
}
/* Red border for invalid inputs */
.is-invalid {
    border-color: #dc3545 !important;
    animation: shake 0.3s ease-in-out;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}
/* Error text below inputs */
.invalid-feedback {
    color: #dc3545;
    font-size: 14px;
    display: block;
    margin-top: 5px;
}

/* Alert box for top-level errors */
.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
}

.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.login-card-header {
    background: var(--theme-color);
    color: white;
    padding: 30px;
    text-align: center;
    position: relative;
}

.brand-logo {
    background: white;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.brand-logo i {
    font-size: 30px;
    color: var(--theme-color);
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 0;
}

.login-card-body {
    padding: 40px 30px 30px;
}

.login-form .form-group {
    margin-bottom: 25px;
}

.login-form label {
    font-weight: 600;
    font-size: 14px;
    color: var(--theme-text);
    margin-bottom: 8px;
    display: block;
}

.input-icon {
    color: var(--theme-color);
    margin-right: 6px;
}

.login-form .form-control {
    height: 50px;
    border-radius: 8px;
    border: 2px solid var(--theme-border);
    padding: 10px 15px;
    font-size: 15px;
    transition: all 0.3s ease;
}

.login-form .form-control:focus {
    border-color: var(--theme-color);
    box-shadow: 0 0 0 0.2rem var(--theme-color-transparent);
}

.password-input-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #6c757d;
    transition: color 0.2s ease;
}

.password-toggle:hover {
    color: var(--theme-color);
}

.custom-control-input:checked ~ .custom-control-label::before {
    background-color: var(--theme-color);
    border-color: var(--theme-color);
}

.custom-checkbox .custom-control-label {
    font-size: 14px;
    color: var(--theme-text);
}

.btn-login {
    background-color: #000000;
    border-color: var(--theme-color);
    font-weight: 600;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px #3f37c9;
}

.btn-login:hover {
    background-color: #3f37c9;
    border-color: var(--theme-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px #000000;
}

.btn-login:active,
.btn-login:focus {
    background-color: var(--theme-color-dark);
    border-color: var(--theme-color-dark);
    box-shadow: 0 0 0 0.2rem var(--theme-color-transparent);
}

.forgot-password-link {
    color: #3f37c9;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s ease;
}

.forgot-password-link:hover {
    color: var(--theme-color);
    text-decoration: none;
}

.login-card-footer {
    padding: 20px 30px;
    background-color: #f8f9fa;
    text-align: center;
    border-top: 1px solid #eee;
}

.login-card-footer p {
    margin-bottom: 0;
    color: var(--theme-text);
    font-size: 14px;
}

.create-account-link {
    color: #3f37c9;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease;
}

.create-account-link:hover {
    color: var(--theme-color-dark);
    text-decoration: none;
}

@media (max-width: 768px) {
    .login-card-header {
        padding: 25px 20px;
    }
    
    .login-card-body {
        padding: 30px 20px 20px;
    }
    
    .brand-logo {
        width: 60px;
        height: 60px;
    }
    
    .login-title {
        font-size: 24px;
    }
}