:root {
    --primary-color: #4a90e2;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --container-bg: rgba(255, 255, 255, 0.95);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    --radius: 16px;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: var(--font-family);
    background: var(--bg-gradient);
    color: #333;
    padding: 20px; 
}

.container {
    background-color: var(--container-bg);
    width: 100%;
    max-width: 400px;
    min-height: 350px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    transition: transform 0.3s ease;
}

.title {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: #333;
    font-weight: 600;
}

.url {
    width: 100%;
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
}

.typeUrl {
    width: 100%;
    padding: 12px 15px;
    font-size: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s ease;
}

.typeUrl:focus {
    border-color: var(--primary-color);
}

.qrGen {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-height: 150px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 12px;
}

/* Responsiveness */
@media screen and (max-width: 480px) {
    .container {
        padding: 25px;
        min-height: 300px;
    }

    .typeUrl {
        font-size: 14px;
        padding: 10px;
    }

    .qrGen {
        min-height: 130px;
    }
}

@media screen and (max-width: 320px) {
    .container {
        padding: 15px;
    }
    
    .typeUrl {
        font-size: 13px;
    }
}