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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
    padding: 50px 40px;
    animation: slideUp 0.5s ease-out;
}

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

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

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

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

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group.checkbox {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.form-group.checkbox input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
    cursor: pointer;
    border: none;
}

.form-group.checkbox label {
    margin: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    color: #333;
    font-weight: 500;
    font-size: 14px;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-login {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-top: 30px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

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

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.loader {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

#alertContainer {
    margin-top: 20px;
}

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 14px;
    animation: slideDown 0.3s ease-out;
}

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

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: center;
    font-size: 12px;
    color: #666;
}

.login-footer p {
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.login-footer ul {
    list-style: none;
}

.login-footer li {
    margin: 5px 0;
    line-height: 1.6;
}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
    }

    .login-header h1 {
        font-size: 24px;
    }
}