* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.shortener-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

h1 {
    color: #2d3748;
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input[type="url"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input[type="url"]:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    margin: 5px;
}
button.btn-danger {
    background: red;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}
button.qr-preview-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}
button.qr-download-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

button:hover {
    background: #5a67d8;
}

.result {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid #e2e8f0;
}

.result.hidden {
    display: none;
}

.result p {
    color: #4a5568;
    margin-bottom: 0.5rem;
}

.url-box {
    display: flex;
    gap: 0.5rem;
}

#shortUrl {
    flex: 1;
    padding: 12px 16px;
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    color: #2d3748;
}

#copyBtn {
    padding: 12px 24px;
    white-space: nowrap;
}