:root { --bg: #0f1115; --panel: #171a21; --text: #e8eaf0; --muted: #9aa3b2; --border: #2a2f3a;
        --primary: #4c7dff; --error: #ff7a7a; --paper-bg: #3a3f4b; }
:root[data-theme="light"] { --bg: #f6f7f9; --panel: #ffffff; --text: #1a1d24; --muted: #5d6573; --border: #dde1e8;
        --primary: #2453d6; --error: #c0392b; --paper-bg: #e3e6ec; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font-family: Inter, "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--primary); }
.page-title { max-width: 1400px; margin: 0 auto; padding: 16px 16px 0; font-size: 1.25rem; font-weight: 700; }
.layout { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 16px; padding: 16px; max-width: 1400px; margin: 0 auto; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; align-self: start;
  position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow: auto; }
fieldset { border: none; padding: 0; margin: 0 0 14px; }
legend { font-weight: 700; font-size: 0.9rem; margin-bottom: 6px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 6px 0; font-size: 0.9rem; }
.check { display: flex; gap: 8px; align-items: center; margin: 6px 0; font-size: 0.9rem; }
input, select, button { font: inherit; }
input[type=url], input[type=date], input[type=number], select { background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; min-width: 0; }
.pair { display: flex; align-items: center; gap: 4px; }
.pair input { width: 64px; }
.feed { display: grid; grid-template-columns: minmax(0, 1fr) 36px 28px; gap: 6px; margin-bottom: 6px; }
.feed .url { width: 100%; }
.feed .color { width: 36px; height: 34px; padding: 2px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); }
.feed .rm { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1.2rem; }
.feed .url, .feed .color, .feed .rm, .feed .chip { grid-row: 1; }
.feed .up-btn { grid-column: 1 / -1; justify-self: start; font-size: 0.8rem; padding: 0; }
.feed .chip { grid-column: 1; display: flex; align-items: center; gap: 8px; min-width: 0; height: 34px; padding: 0 8px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--bg); font-size: 0.85rem; }
.feed .chip[hidden], .feed .url[hidden], .feed .up-btn[hidden] { display: none; }
.feed .chip-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feed .chip-x { background: none; border: none; color: var(--muted); cursor: pointer; padding: 4px; line-height: 1; }
.feed .warn { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 0.8rem; }
.feed.drag { outline: 2px dashed var(--primary); outline-offset: 3px; border-radius: 8px; }
.feed.busy { opacity: 0.6; }
.feed.has-file .up-btn { display: none; }
.feed .err { grid-column: 1 / -1; margin: 0; color: var(--error); font-size: 0.8rem; }
.link { background: none; border: none; color: var(--primary); cursor: pointer; padding: 4px 0; }
.hint { color: var(--muted); font-size: 0.8rem; margin: 4px 0; }
.tabs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.tabs label { position: relative; }
.tabs input { position: absolute; opacity: 0; }
.tabs span { display: block; text-align: center; padding: 6px 0; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.tabs input:checked + span { background: var(--primary); border-color: var(--primary); color: #fff; }
.tabs input:focus-visible + span { outline: 2px solid var(--primary); outline-offset: 2px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions button { border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.actions .primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.fname { flex-basis: 100%; margin: 0; color: var(--muted); font-size: 0.8rem; word-break: break-all; }
.preview-wrap { position: relative; min-width: 0; }
.progress { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--primary); animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.3; } }
@media (prefers-reduced-motion: reduce) { .progress { animation: none; } }
.preview-head { display: flex; justify-content: space-between; gap: 8px; padding: 8px 0; color: var(--muted); font-size: 0.85rem; flex-wrap: wrap; }
.notes { margin: 0 0 8px; padding-left: 18px; color: var(--error); font-size: 0.85rem; }
.preview { background: var(--paper-bg); border-radius: 12px; padding: 12px; display: grid; gap: 12px; justify-items: center; min-height: 300px; }
.preview canvas { max-width: 100%; height: auto; background: #fff; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25); }
.empty { color: var(--muted); align-self: center; text-align: center; padding: 40px 16px; }
.foot { text-align: center; padding: 16px; color: var(--muted); font-size: 0.85rem; }
@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 12px 16px; }
  .panel { position: static; max-height: none; }
}