body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f2f2f2;
}

.container {
    max-width: 900px;
    margin: 50px auto;
    padding: 30px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.logo {
    display: block;
    margin: 0 auto 20px auto;
    max-height: 50px;
}

h1 {
    text-align: center;
    color: #111827;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 30px;
}

.mode-select {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.mode-select label {
    font-weight: 500;
}

.customize label {
    display: block;
    margin: 10px 0;
    color: #374151;
}

.generate-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #8EAFDA;
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.generate-btn:hover {
    background-color: #7697c6;
}

.copy-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #92dba5;
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.copy-btn:hover {
    background-color: #92bba5;
}

input[type="text"], input[type="number"] {
    width: 100%;
    padding: 16px;
    margin-top: 10px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 18px;
    box-sizing: border-box;
}

.result-wrapper {
    margin-top: 20px;
}