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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #111;
    background: #fff;
    margin: 0 auto;
    padding: 48px 24px 64px;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.05rem;
    color: #555;
    margin-bottom: 40px;
}

/* Upload area */
.upload-area {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    margin-bottom: 40px;
    transition: border-color 0.15s;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #111;
}

.upload-area label {
    display: block;
    font-size: 0.95rem;
    color: #333;
    margin-bottom: 16px;
    cursor: pointer;
}

.upload-area input[type="file"] {
    display: none;
}

.upload-button {
    display: inline-block;
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    background: #111;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
}

.upload-button:hover {
    background: #333;
}

.upload-hint {
    font-size: 0.8rem;
    color: #999;
    margin-top: 12px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.checkbox-container label {
    display: inline;
    margin-bottom: 0;
    font-size: 0.9rem;
    color: #555;
    cursor: pointer;
}

.checkbox-container input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.status {
    font-size: 0.85rem;
    color: #555;
    margin-top: 12px;
    display: none;
}

.status.visible {
    display: block;
}

/* Sections */
h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    margin-top: 32px;
}

p {
    font-size: 0.925rem;
    color: #333;
    margin-bottom: 12px;
}

ul {
    margin: 0 0 16px 20px;
    font-size: 0.925rem;
    color: #333;
}

ul li {
    margin-bottom: 6px;
}

hr {
    border: none;
    border-top: 1px solid #e5e5e5;
    margin: 32px 0;
}

code {
    font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
    font-size: 0.85em;
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 3px;
}

/* CTA section */
.cta {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 24px;
    margin-top: 40px;
}

.cta p {
    margin-bottom: 8px;
}

.cta a {
    color: #111;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cta a:hover {
    color: #555;
}

/* Footer */
footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid #e5e5e5;
    font-size: 0.8rem;
    color: #999;
}

footer a {
    color: #999;
    text-decoration: underline;
}

footer a:hover {
    color: #555;
}