/**
 * Login Page Styles - Hệ thống Điều hành Kinh doanh
 */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

body.login-page {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    margin: 0;
}

.login-container {
    max-width: 450px;
    width: 100%;
}

.login-card {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
}

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

.login-header {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.login-header p {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

.logo-container {
    margin-bottom: 20px;
}

.logo-container i {
    display: inline-block;
}

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

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

.form-label {
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 14px;
    display: block;
}

.form-control {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 12px 15px;
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
    outline: none;
}

.input-group-text {
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-right: none;
    border-radius: 10px 0 0 10px;
    color: #6c757d;
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 10px 10px 0;
}

.input-group .form-control:focus {
    border-left: 2px solid var(--primary-color);
}

.input-group .form-control:focus + .input-group-text,
.input-group .form-control:focus ~ .input-group-text {
    border-color: var(--primary-color);
}

.password-toggle {
    cursor: pointer;
    color: #6c757d;
    transition: color 0.3s ease;
    border-left: none !important;
    border-radius: 0 10px 10px 0 !important;
}

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

.btn-login {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    border: none;
    border-radius: 10px;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    width: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.alert {
    border-radius: 10px;
    border: none;
    padding: 12px 15px;
    margin-bottom: 20px;
    animation: shake 0.5s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.footer-text {
    text-align: center;
    margin-top: 30px;
    color: #6c757d;
    font-size: 13px;
}

.footer-text a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-text a:hover {
    text-decoration: underline;
}

.loading-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 10px;
    vertical-align: middle;
}

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

.btn-login.loading .loading-spinner {
    display: inline-block;
}

/* Cloudflare Turnstile styling */
.cf-turnstile {
    margin: 10px 0;
}

/* Responsive */
@media (max-width: 576px) {
    .login-container {
        max-width: 100%;
    }
    
    .login-header {
        padding: 30px 20px;
    }
    
    .login-body {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
}

/* Invalid feedback */
.was-validated .form-control:invalid {
    border-color: var(--danger-color);
}

.was-validated .form-control:invalid:focus {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.15);
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: var(--danger-color);
}

.was-validated .form-control:invalid ~ .invalid-feedback {
    display: block;
}