/* Login Page Styles */
:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --danger-color: #f56565;
    --light-bg: #f7fafc;
    --border-color: #e2e8f0;
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    margin-bottom: 30px;
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 14px;
    color: #718096;
    margin: 0;
}

.login-form {
    margin-bottom: 20px;
}

.form-label {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-control,
.form-control-lg {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-control-lg:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-check {
    margin-bottom: 0;
}

.form-check-input {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.4rem;
}

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

.form-check-label {
    margin-left: 8px;
    cursor: pointer;
    color: #4a5568;
    font-size: 14px;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    font-weight: 600;
    font-size: 16px;
    padding: 12px 24px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-lg {
    padding: 14px 28px;
    min-height: 48px;
}

.alert {
    border: 1px solid #fc8181;
    background-color: #fff5f5;
    color: #c53030;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 14px;
}

.text-danger {
    color: var(--danger-color);
    display: block;
    margin-top: 6px;
    font-size: 13px;
}

.text-muted {
    color: #718096;
}

.text-center {
    text-align: center;
}

.login-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

/* Form validation styles */
input.form-control:invalid:not(:placeholder-shown) {
    border-color: var(--danger-color);
}

/* Password input specific styles */
input[type="password"] {
    font-size: 16px;
    /*letter-spacing: 0.15em;*/
}

/* Responsive Design */
@media (max-width: 576px) {
    .login-card {
        padding: 30px 20px;
        max-width: 100%;
    }

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

    .btn-lg {
        font-size: 15px;
    }
}

/* Loading animation for submit button */
.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn:disabled::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}