:root {
  --bg: #f6f5f2;
  --card: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #5f6368;
  --ink-3: #9aa0a6;
  --line: #e4e2dc;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --ok: #188038;
  --err: #c5221f;
  --radius: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Segoe UI", sans-serif;
  color: var(--ink);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); height: 100vh; display: flex; flex-direction: column; user-select: none; }
button { font: inherit; cursor: pointer; }
.hidden { display: none !important; }

.topbar { padding: 18px 28px 6px; }
.topbar h1 { margin: 0; font-size: 22px; }
.topbar p { margin: 4px 0 0; color: var(--ink-2); font-size: 14px; }

.layout { flex: 1; display: grid; grid-template-columns: minmax(380px, 440px) 1fr; gap: 18px; padding: 14px 28px 24px; min-height: 0; }
.steps { overflow-y: auto; display: flex; flex-direction: column; gap: 14px; padding-right: 4px; }
.side { display: flex; flex-direction: column; gap: 14px; min-height: 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.card h2 { margin: 0 0 12px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.card h2 small { font-weight: normal; color: var(--ink-3); font-size: 13px; }
.num { width: 24px; height: 24px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 13px; display: inline-flex; align-items: center; justify-content: center; }

/* 拖放區 */
.dropzone { border: 2px dashed #c9c6bd; border-radius: 12px; padding: 26px 12px; text-align: center; cursor: pointer; color: var(--ink-2); transition: .15s; }
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.dropzone.compact { padding: 10px; }
.dropzone.compact .drop-icon, .dropzone.compact .drop-sub { display: none; }
.dropzone.compact .drop-title { font-size: 14px; }
.drop-icon { width: 44px; height: 44px; }
.drop-title { font-size: 17px; font-weight: 600; margin-top: 6px; color: var(--ink); }
.dropzone:hover .drop-title { color: var(--accent); }
.drop-sub { font-size: 13px; margin-top: 4px; }
.link { color: var(--accent); text-decoration: underline; }

.file-list { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: 210px; overflow-y: auto; }
.file-list li { display: flex; align-items: center; gap: 10px; padding: 6px 8px; border-radius: 10px; background: #faf9f7; border: 1px solid var(--line); cursor: pointer; }
.file-list li.active { border-color: var(--accent); background: var(--accent-soft); }
.file-list img, .file-list .thumb-ph { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; background: #ddd; flex: none; }
.file-list .meta { flex: 1; min-width: 0; }
.file-list .fname { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-list .fsub { font-size: 12px; color: var(--ink-2); }
.file-list .warn { color: #b06000; }
.file-list .rm { border: none; background: none; color: var(--ink-3); font-size: 18px; padding: 2px 6px; border-radius: 6px; }
.file-list .rm:hover { background: #eee; color: var(--err); }
.file-list li.loading { color: var(--ink-2); font-size: 13px; cursor: default; }
.btn-text { border: none; background: none; color: var(--accent); padding: 6px 2px; font-size: 14px; }

/* 尺寸卡片 */
.size-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.size { position: relative; display: flex; align-items: center; gap: 12px; padding: 10px 12px; border: 2px solid var(--line); border-radius: 12px; background: #fff; text-align: left; transition: .12s; }
.size:hover { border-color: #b8c7e8; }
.size.on { border-color: var(--accent); background: var(--accent-soft); }
.size .shape-wrap { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; flex: none; }
.size .shape { background: #cfd4dc; border-radius: 3px; max-width: 40px; max-height: 40px; }
.size.on .shape { background: var(--accent); }
.size .t1 { font-weight: 600; font-size: 15px; }
.size .t2 { font-size: 12px; color: var(--ink-2); line-height: 1.35; }
.size .check { position: absolute; top: 6px; right: 8px; width: 18px; height: 18px; border-radius: 50%; border: 2px solid #c9c6bd; background: #fff; }
.size.on .check { border-color: var(--accent); background: var(--accent); }
.size.on .check::after { content: ""; position: absolute; left: 4px; top: 1px; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.size .x { position: absolute; bottom: 4px; right: 6px; font-size: 12px; color: var(--ink-3); }

.slider-row { display: flex; align-items: center; gap: 12px; color: var(--ink-2); font-size: 14px; }
.slider-row input { flex: 1; accent-color: var(--accent); height: 24px; }

.more summary { cursor: pointer; font-weight: 600; font-size: 15px; color: var(--ink-2); }
.more[open] summary { margin-bottom: 12px; }
.more-row { display: flex; align-items: center; gap: 12px; margin-top: 10px; font-size: 14px; }
.more-row > label { width: 64px; color: var(--ink-2); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg button { border: none; background: #fff; padding: 7px 12px; font-size: 13px; }
.seg button.on { background: var(--accent); color: #fff; }
.custom { display: flex; align-items: center; gap: 6px; }
.custom input { width: 76px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.btn-small { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 12px; font-size: 13px; }
.btn-small:hover { border-color: var(--accent); color: var(--accent); }

/* 預覽 */
.preview-card { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.preview-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.preview-head h2 { margin: 0; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.tabs button { border: 1px solid var(--line); background: #fff; border-radius: 20px; padding: 4px 12px; font-size: 13px; }
.tabs button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.preview-box { flex: 1; margin-top: 12px; border-radius: 10px; background: repeating-conic-gradient(#efede8 0% 25%, #f7f6f3 0% 50%) 50% / 20px 20px; display: flex; align-items: center; justify-content: center; position: relative; min-height: 0; overflow: hidden; }
.preview-box canvas { box-shadow: 0 4px 20px rgba(0,0,0,.18); border-radius: 2px; }
.preview-empty { position: absolute; color: var(--ink-3); font-size: 15px; }
.preview-note { margin: 10px 0 0; font-size: 13px; color: var(--ink-2); min-height: 18px; }

.start-card { display: flex; flex-direction: column; gap: 12px; }
.save-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.save-label { font-size: 13px; color: var(--ink-2); }
.save-text { font-size: 14px; margin-top: 2px; word-break: break-all; }
.btn-primary { border: none; background: var(--accent); color: #fff; font-size: 17px; font-weight: 600; padding: 14px; border-radius: 12px; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:disabled { background: #c9ced6; cursor: not-allowed; filter: none; }
.btn-secondary { border: 1px solid var(--line); background: #fff; font-size: 15px; padding: 12px 18px; border-radius: 12px; }
.start-hint { font-size: 13px; color: var(--ink-2); text-align: center; min-height: 18px; }

/* 拖曳提示 */
.drag-overlay { position: fixed; inset: 0; background: rgba(31,111,235,.12); border: 4px dashed var(--accent); display: flex; align-items: center; justify-content: center; z-index: 20; pointer-events: none; }
.drag-overlay div { background: var(--accent); color: #fff; font-size: 20px; font-weight: 600; padding: 16px 28px; border-radius: 14px; }

/* 轉檔進度 */
.sheet { position: fixed; inset: 0; background: rgba(20,20,20,.35); display: flex; align-items: center; justify-content: center; z-index: 10; }
.sheet-panel { width: min(640px, 90vw); max-height: 86vh; display: flex; flex-direction: column; background: #fff; border-radius: 18px; padding: 24px 26px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.sheet-panel h2 { margin: 0; font-size: 20px; }
.run-sub { margin: 6px 0 14px; color: var(--ink-2); font-size: 14px; }
.overall { height: 10px; background: #eceae4; border-radius: 6px; overflow: hidden; }
.overall div { height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.job-list { list-style: none; padding: 0; margin: 16px 0; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.job-list li { display: grid; grid-template-columns: 1fr 120px 70px; align-items: center; gap: 12px; font-size: 14px; }
.job-list .jn { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.job-list .jbar { height: 6px; background: #eceae4; border-radius: 4px; overflow: hidden; }
.job-list .jbar div { height: 100%; width: 0; background: var(--accent); }
.job-list .js { font-size: 13px; color: var(--ink-2); text-align: right; }
.job-list li.done .js { color: var(--ok); }
.job-list li.done .jbar div { background: var(--ok); }
.job-list li.error .js, .job-list li.error .jn { color: var(--err); }
.job-list .jerr { grid-column: 1 / -1; font-size: 12px; color: var(--err); margin-top: -4px; }
.job-list a { color: var(--accent); cursor: pointer; text-decoration: underline; }
.sheet-actions { display: flex; gap: 10px; justify-content: flex-end; align-items: center; }
.sheet-actions .btn-primary { padding: 12px 22px; font-size: 15px; }

.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); background: #323232; color: #fff; padding: 12px 20px; border-radius: 10px; font-size: 14px; z-index: 30; max-width: 80vw; }
.size > div:nth-child(2) { padding-right: 16px; min-width: 0; }

/* 網站版補充 */
.privacy { color: var(--ok); }
.banner { margin: 8px 28px 0; padding: 12px 16px; border-radius: 12px; background: #fdecea; color: var(--err); font-size: 14px; border: 1px solid #f5c2be; }
.banner.soft { background: #fff7e0; color: #8a5a00; border-color: #f2dca0; }
.job-list .js a { white-space: nowrap; }
@media (max-width: 860px) {
  body { height: auto; }
  .layout { grid-template-columns: 1fr; padding: 12px 16px 24px; }
  .topbar { padding: 16px 16px 4px; }
  .preview-box { min-height: 320px; }
}

/* 自訂尺寸（步驟 2 底部） */
.custom-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; padding: 10px 12px; border: 2px dashed var(--line); border-radius: 12px; font-size: 14px; color: var(--ink-2); }
.custom-row:focus-within { border-color: var(--accent); background: var(--accent-soft); }
.custom-label { font-weight: 600; color: var(--ink); margin-right: 4px; }
.custom-row input { width: 72px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; font: inherit; background: #fff; }
.custom-row .unit { font-size: 13px; }
.custom-row .btn-small { margin-left: auto; }

/* 模糊滑桿的「預設」點位 */
.slider-row { align-items: flex-start; }
.slider-row > span { line-height: 24px; }
.slider-wrap { flex: 1; position: relative; padding-bottom: 30px; }
.slider-wrap input { width: 100%; margin: 0; display: block; }
.default-mark { position: absolute; top: 22px; transform: translateX(-50%); border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 12px; padding: 2px 10px; border-radius: 12px; white-space: nowrap; }
.default-mark .tick { position: absolute; left: 50%; top: -8px; width: 2px; height: 7px; background: #b9b5ab; transform: translateX(-50%); }
.default-mark:hover { border-color: var(--accent); color: var(--accent); }
.default-mark.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.default-mark.on .tick { background: var(--accent); }

/* 每種尺寸有自己的顏色（--c 由程式帶入） */
.size { --c: var(--accent); align-items: flex-start; }
.size .shape-wrap { margin-top: 2px; }
.size .shape { background: color-mix(in srgb, var(--c) 30%, #fff); }
.size:hover { border-color: color-mix(in srgb, var(--c) 45%, #fff); }
.size.on { border-color: var(--c); background: color-mix(in srgb, var(--c) 7%, #fff); }
.size.on .shape { background: var(--c); }
.size.on .check { border-color: var(--c); background: var(--c); }
.size-text { padding-right: 16px; min-width: 0; }
.size .res { display: inline-block; margin-top: 6px; padding: 2px 9px; border-radius: 999px; font-size: 12.5px; font-weight: 700; letter-spacing: .02em; font-variant-numeric: tabular-nums; color: var(--c); background: color-mix(in srgb, var(--c) 13%, #fff); }
.size.on .res { color: #fff; background: var(--c); }
.size .x { bottom: 8px; }

.tabs button { --c: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.tabs .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c); }
.tabs button.on { background: var(--c); border-color: var(--c); color: #fff; }
.tabs button.on .dot { background: #fff; }

/* 預覽播放器 */
.pv { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; left: 0; top: 0; }
.player { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.pbtn { flex: none; width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: #fff; color: var(--ink); display: inline-flex; align-items: center; justify-content: center; padding: 0; }
.pbtn:hover { border-color: var(--accent); color: var(--accent); }
.pbtn svg { width: 18px; height: 18px; }
#playBtn { background: var(--ink); color: #fff; border-color: var(--ink); }
#playBtn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.pbtn .i-pause, .pbtn.playing .i-play { display: none; }
.pbtn.playing .i-pause { display: block; }
.pbtn .i-sound, .pbtn.sound .i-muted { display: none; }
.pbtn.sound .i-sound { display: block; }
#seek { flex: 1; min-width: 0; height: 24px; accent-color: var(--accent); }
.time { flex: none; font-size: 13px; color: var(--ink-2); font-variant-numeric: tabular-nums; min-width: 84px; text-align: right; }
.preview-note { margin-top: 8px; }
.size .res { white-space: nowrap; }
.size .t2:empty { display: none; }
.size .x { position: static; margin-left: 8px; font-size: 12px; color: var(--ink-3); text-decoration: underline; }
.size .x:hover { color: var(--err); }

/* 每支影片各自選尺寸 */
.file-list { max-height: 300px; }
.file-list li { align-items: flex-start; }
.file-list .rm { align-self: center; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.chip { --c: var(--accent); border: 1.5px solid color-mix(in srgb, var(--c) 40%, #fff); background: #fff; color: color-mix(in srgb, var(--c) 75%, #fff); border-radius: 999px; font-size: 11.5px; font-weight: 700; padding: 0 8px; line-height: 19px; font-variant-numeric: tabular-nums; }
.chip:hover { border-color: var(--c); color: var(--c); }
.chip.on { background: var(--c); border-color: var(--c); color: #fff; }
.chip-none { font-size: 12px; color: var(--err); line-height: 22px; margin-left: 2px; }

.editing-row { display: flex; align-items: center; gap: 8px; margin: -2px 0 12px; padding: 8px 10px; border-radius: 12px; background: #f3f2ee; border: 1px solid var(--line); }
.editing-row img { width: 34px; height: 34px; object-fit: cover; border-radius: 6px; flex: none; background: #ddd; }
.editing-text { flex: 1; min-width: 0; }
.editing-label { font-size: 12px; color: var(--ink-2); }
.editing-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-btn { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line); background: #fff; font-size: 18px; line-height: 1; padding: 0; color: var(--ink-2); }
.nav-btn:hover { border-color: var(--accent); color: var(--accent); }
.apply-btn { flex: none; white-space: nowrap; }
.start-hint.warn { color: #b06000; }
/* 清單上的尺寸標籤：只顯示有選的，統一淡色、不可點 */
.chip { cursor: inherit; }
.chip:hover { border-color: color-mix(in srgb, var(--c) 40%, #fff); color: color-mix(in srgb, var(--c) 75%, #fff); }

/* 步驟 1：一鍵套用尺寸到全部影片 */
.quick-bar { margin-top: 10px; padding: 10px 12px; border-radius: 12px; background: #f3f2ee; border: 1px solid var(--line); }
.quick-label { font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 8px; }
.quick-line { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.quick-sizes { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.quick-actions { display: flex; gap: 6px; }
.qsize { --c: var(--accent); border: 1.5px solid color-mix(in srgb, var(--c) 45%, #fff); background: #fff; color: var(--c); border-radius: 999px; font-size: 13px; font-weight: 700; padding: 3px 12px; font-variant-numeric: tabular-nums; }
.qsize:hover { border-color: var(--c); }
.qsize.some { background: color-mix(in srgb, var(--c) 16%, #fff); border-color: color-mix(in srgb, var(--c) 60%, #fff); }
.qsize.on { background: var(--c); border-color: var(--c); color: #fff; }
.quick-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.quick-head .quick-label { margin: 0; }
.quick-actions .btn-small { padding: 4px 10px; font-size: 12.5px; }

/* 版本號 */
.topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.version { flex: none; font-size: 12px; color: var(--ink-3); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; margin-top: 4px; background: #fff; }