body {
    font-family: 'Inter', sans-serif;
    background: #f4f4f4;
    padding: 2em;
    text-align: center;
}
.container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 2em;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}
img.logo {
    height: 60px;
    margin-bottom: 1em;
}
textarea {
    width: 100%;
    height: 150px;
    font-size: 1rem;
    padding: 1em;
    border-radius: 8px;
    border: 1px solid #ccc;
    resize: vertical;
    box-sizing: border-box;
}
.explain  {
    text-align: left;
}
button {
    background: #004289;
    color: white;
    padding: 0.8em 2em;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 1em;
}
button:hover {
    background: #8DBE4D;
}
.link-box {
    margin-top: 2em;
    background: #f1f1f1;
    padding: 1em;
    border-radius: 8px;
    word-break: break-all;
}
.copy-btn {
    background: #004289;
    margin-left: 1em;
}
.copy-btn:hover {
    background: #8DBE4D;
}

.message {
    background: #fefefe;
    border-left: 6px solid #d92027;
    padding: 1em;
    margin-top: 1em;
    text-align: left;
    white-space: pre-wrap;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    font-size: 1rem;
    line-height: 1.5;
}

.notice {
    margin-top: 1.5em;
    color: #777;
    font-style: italic;
}