* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-wrapper { width: 100%; padding: 20px; }

.container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

header h1 { font-size: 2.5rem; margin: 10px 0; }
.subtitle { opacity: 0.9; margin-bottom: 30px; }

.card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    color: #333;
}

.input-group { display: flex; gap: 10px; margin-bottom: 20px; }
input[type="url"] {
    flex: 1;
    padding: 15px;
    border: 2px solid #eee;
    border-radius: 10px;
    outline: none;
}
button {
    background: #4a90e2;
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: 10px;
    font-weight: bold;
    cursor: pointer;
}

.result-area {
    margin-top: 25px;
    border-top: 1px solid #eee;
    padding-top: 20px;
    text-align: left;
}

.copy-box { display: flex; gap: 5px; margin-top: 5px; }
.copy-box input { flex: 1; padding: 8px; background: #f4f4f4; border: 1px solid #ddd; }

.output-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 15px;
    margin-top: 20px;
}
.qr-container img { width: 100%; max-width: 150px; border: 1px solid #eee; }
textarea { width: 100%; height: 70px; font-size: 12px; padding: 5px; }

.info-section { margin-top: 40px; font-size: 0.9rem; line-height: 1.6; opacity: 0.8; }
footer { margin-top: 30px; font-size: 0.8rem; }
footer a { color: #ffcc00; text-decoration: none; }