:root { color-scheme: light; }
body { font-family: -apple-system, "Apple SD Gothic Neo", sans-serif; margin: 0; background: #f4f4f5; color: #18181b; }
header { padding: 20px 24px; background: #18181b; color: #fafafa; }
header h1 { margin: 0 0 6px; font-size: 22px; }
header p { margin: 0; color: #d4d4d8; }
main { max-width: 1080px; margin: 0 auto; padding: 16px; }
.panel { background: #fff; border: 1px solid #e4e4e7; border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.panel h2 { margin: 0 0 10px; font-size: 17px; }
.panel h3 { font-size: 14px; color: #52525b; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 10px; }
.hint { color: #52525b; font-size: 13px; }
#drop { border: 2px dashed #a1a1aa; border-radius: 8px; padding: 28px; text-align: center; cursor: pointer; color: #52525b; }
#drop.over { border-color: #18181b; background: #fafafa; }
#preview-img, #orig { max-width: 320px; max-height: 240px; border: 1px solid #e4e4e7; display: none; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
#svg-holder { border: 1px solid #e4e4e7; min-height: 200px; max-height: 480px; overflow: auto; background: #fff; }
#svg-holder svg { width: 100%; height: auto; display: block; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { border: 1px solid #e4e4e7; padding: 6px 8px; text-align: left; }
th { background: #fafafa; }
button { padding: 7px 14px; border-radius: 6px; border: 1px solid #18181b; background: #18181b; color: #fff; cursor: pointer; }
button:disabled { opacity: .45; cursor: default; }
button.ghost { background: #fff; color: #18181b; }
input, select { padding: 6px 8px; border: 1px solid #d4d4d8; border-radius: 6px; }
#status, #result-info, #recommend-out { font-size: 13px; color: #52525b; white-space: pre-wrap; }