/* ============================================================
   图片旋转 · 明亮通透风
   ------------------------------------------------------------
   配色取自 capscene.top 首页：天空蓝 + 粉紫青柔和渐变。

   性能取舍：没有大范围使用 backdrop-filter。
   这台机器是 Intel 核显，页面上还有动图在实时播放，
   重滤镜会强制走软件渲染、把动图拖卡。
   通透感改用「半透明白 + 柔和蓝色投影 + 大圆角」来实现，
   只在顶栏用了一处轻量 backdrop-filter。
   ============================================================ */

:root {
  /* 天空 */
  --sky-1: #eaf7ff;
  --sky-2: #d8eefc;
  --sky-3: #c5e5f8;

  /* 文字 */
  --ink:   #2b4a63;
  --ink-2: #6d90aa;
  --ink-3: #9db8cb;

  /* 点缀色（对应参考图里的水母色） */
  --blue:   #4aa8dd;
  --cyan:   #6fd2e0;
  --pink:   #f7a8c8;
  --mint:   #8fd9c0;
  --lav:    #b9a8ec;

  --card:   rgba(255, 255, 255, .84);
  --card-2: rgba(255, 255, 255, .62);
  --line:   rgba(122, 172, 205, .22);
  --shadow: 0 10px 30px rgba(88, 148, 190, .14);
  --shadow-sm: 0 4px 14px rgba(88, 148, 190, .12);
  --radius: 18px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font: 14px/1.65 -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;

  /* 天空 + 三团柔光（用 radial-gradient 做，比 filter:blur 便宜得多） */
  background:
    radial-gradient(1100px 620px at 10% -8%,  #ffe6f2 0%, transparent 58%),
    radial-gradient(1000px 560px at 92% -4%,  #e2f7ee 0%, transparent 54%),
    radial-gradient(900px 700px at 50% 112%,  #e6f1ff 0%, transparent 62%),
    linear-gradient(180deg, var(--sky-1) 0%, #f8fdff 46%, var(--sky-2) 100%);
  background-attachment: fixed;
}

/* ---------------- 顶栏 ---------------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 15px 24px;
  background: rgba(255, 255, 255, .74);
  backdrop-filter: blur(12px) saturate(1.25);
  -webkit-backdrop-filter: blur(12px) saturate(1.25);
  border-bottom: 1px solid rgba(255, 255, 255, .8);
  box-shadow: 0 2px 18px rgba(88, 148, 190, .08);
}

.topbar h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .5px;
  /* 渐变文字，呼应参考图里那行标题 */
  background: linear-gradient(92deg, #ef9dc4 0%, #6fb7e6 52%, #7ed7c4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.topbar .sub { color: var(--ink-2); font-size: 13px; }

.badge {
  margin-left: auto;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: #1f7a5c;
  background: linear-gradient(135deg, #dff7ec, #d2f2ff);
  border: 1px solid rgba(143, 217, 192, .6);
  box-shadow: 0 2px 8px rgba(143, 217, 192, .25);
}

/* ---------------- 布局 ---------------- */
.layout {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 18px;
  padding: 18px 24px;
  align-items: start;
  max-width: 1440px;
  margin: 0 auto;
}
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, .92);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(2px);
}

/* ---------------- 拖放区 ---------------- */
.dropzone {
  padding: 26px 14px;
  text-align: center;
  cursor: pointer;
  outline: none;
  border: 2px dashed rgba(122, 190, 225, .55);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(255,255,255,.7), rgba(226,244,255,.5));
  transition: border-color .18s, background .18s, transform .18s, box-shadow .18s;
}
.dropzone:hover, .dropzone:focus {
  border-color: var(--blue);
  background: linear-gradient(160deg, rgba(255,255,255,.9), rgba(214,240,255,.72));
  box-shadow: 0 6px 20px rgba(74, 168, 221, .18);
  transform: translateY(-1px);
}
.dropzone.over {
  border-color: var(--mint);
  background: linear-gradient(160deg, rgba(230,255,246,.95), rgba(214,244,255,.8));
  box-shadow: 0 8px 26px rgba(143, 217, 192, .3);
}
.dz-icon { font-size: 26px; line-height: 1;
  background: linear-gradient(135deg, var(--blue), var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.dz-main { margin-top: 8px; font-weight: 600; }
.dz-sub  { margin-top: 2px; font-size: 12px; color: var(--ink-2); }

/* ---------------- 文件列表 ---------------- */
.files-head {
  display: flex; justify-content: space-between; align-items: center;
  margin: 15px 4px 7px;
  font-size: 13px; color: var(--ink-2);
}
.link {
  border: 0; background: none; cursor: pointer;
  font-size: 13px; padding: 2px 4px;
  color: var(--blue);
  border-radius: 6px;
  transition: background .15s;
}
.link:hover { background: rgba(74, 168, 221, .1); text-decoration: none; }

.filelist { list-style: none; margin: 0; padding: 0; max-height: 46vh; overflow: auto; }
.filelist li {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 9px; margin-bottom: 3px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s;
}
.filelist li:hover { background: rgba(214, 240, 255, .55); }
.filelist li.active {
  background: linear-gradient(120deg, rgba(214, 240, 255, .95), rgba(238, 246, 255, .9));
  border-color: rgba(122, 190, 225, .45);
  box-shadow: var(--shadow-sm);
}
.filelist img {
  width: 40px; height: 40px; flex: none;
  object-fit: contain;
  border-radius: 9px;
  border: 1px solid rgba(255,255,255,.9);
  background: repeating-conic-gradient(#eef4f9 0 25%, #ffffff 0 50%) 0 0/12px 12px;
  box-shadow: 0 2px 8px rgba(88,148,190,.12);
}
.filelist .meta { min-width: 0; }
.filelist .nm {
  display: block; font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.filelist .inf { font-size: 11px; color: var(--ink-3); }
.filelist .drop {
  margin-left: auto; padding: 0 5px; line-height: 1;
  border: 0; background: none; cursor: pointer;
  font-size: 16px; color: var(--ink-3);
  border-radius: 6px; transition: background .15s, color .15s;
}
.filelist .drop:hover { color: #e5678f; background: rgba(247, 168, 200, .16); }

/* ---------------- 预览台 ---------------- */
.stage {
  position: relative;
  display: grid; place-items: center;
  height: min(52vh, 470px);
  overflow: hidden;
  border-radius: var(--radius);
  /* 柔和的棋盘格，透明度一眼可辨又不刺眼 */
  background:
    repeating-conic-gradient(rgba(226, 238, 248, .85) 0 25%, rgba(252, 254, 255, .95) 0 50%)
    0 0 / 16px 16px;
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: inset 0 2px 16px rgba(88, 148, 190, .08);
}
.empty { color: var(--ink-2); }

/* 尺寸由 JS 按旋转后的包围盒撑开 —— CSS 的 rotate 不改布局尺寸，四角会被裁 */
.bbox { display: grid; place-items: center; overflow: hidden; }

#preview {
  display: block;
  transform-origin: center center;
  will-change: transform;
  image-orientation: from-image;
  /* 刻意不加 filter:drop-shadow —— 滤镜作用在带动画的元素上，
     每一帧都要重算（512×512 的 GIF 约 50fps = 每秒 50 次），
     在 Intel 核显上会把动图拖卡。
     也不能挂到外层 .bbox 上：它是矩形且带 overflow:hidden，
     投影会被裁掉，对透明 GIF 还会显出一个方框。
     所以干脆不加阴影，靠柔和棋盘格底衬托。 */
}

.stage-tools {
  position: absolute; left: 12px; bottom: 12px; right: 12px;
  display: flex; align-items: center; gap: 10px;
  pointer-events: none;
}
.stage-tools > * { pointer-events: auto; }
.stage-meta {
  padding: 3px 10px;
  font-size: 12px; color: var(--ink-2);
  background: rgba(255, 255, 255, .88);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

/* ---------------- 控制区 ---------------- */
.controls { margin-top: 16px; display: flex; flex-direction: column; gap: 13px; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap { flex-wrap: wrap; }
/* min-width 按最长标签「空角填色」定，保证各行标签左对齐 */
.lbl { flex: none; min-width: 52px; font-size: 13px; color: var(--ink-2); }

/* 控件旁边的常驻说明（如「背景」为什么有时无效） */
.hint { font-size: 12px; color: var(--ink-3); }

input[type=range] {
  flex: 1; min-width: 120px; height: 6px;
  -webkit-appearance: none; appearance: none;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--sky-3), rgba(185, 168, 236, .45));
  outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: linear-gradient(140deg, #ffffff, var(--sky-1));
  border: 2px solid var(--blue);
  box-shadow: 0 2px 10px rgba(74, 168, 221, .4);
  cursor: pointer;
  transition: transform .12s;
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.12); }

.num { display: flex; align-items: center; gap: 2px; color: var(--ink-2); }
.num input {
  width: 64px; padding: 5px 8px;
  text-align: right; font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, .85);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.num input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(74, 168, 221, .16);
}

.seg {
  display: inline-flex;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.seg button {
  padding: 6px 12px; font: inherit; cursor: pointer;
  border: 0; border-right: 1px solid var(--line);
  background: transparent; color: var(--ink);
  transition: background .15s, color .15s;
}
.seg button:last-child { border-right: 0; }
.seg button:hover { background: rgba(214, 240, 255, .7); }
.seg button.on {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 2px 10px rgba(74, 168, 221, .35);
}

select, input[type=color] {
  padding: 5px 8px; font: inherit; color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255,255,255,.85);
  outline: none;
  cursor: pointer;
}
select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(74,168,221,.16); }
input[type=color] { width: 40px; height: 32px; padding: 2px; }
/* 图片本身支持透明时，背景色对它无效 —— 置灰给出明确反馈 */
input[type=color]:disabled { opacity: .38; cursor: not-allowed; }

button.primary, button.ghost {
  padding: 8px 20px; font: inherit; cursor: pointer;
  border-radius: 12px;
  transition: transform .12s, box-shadow .18s, background .15s;
}
button.primary {
  border: 0; color: #fff; font-weight: 600;
  background: linear-gradient(135deg, var(--blue) 0%, var(--cyan) 55%, #8fd9c0 100%);
  box-shadow: 0 6px 18px rgba(74, 168, 221, .34);
}
button.primary:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 9px 24px rgba(74, 168, 221, .42);
}
button.ghost {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.78);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
button.ghost:hover:not(:disabled) { background: #fff; transform: translateY(-1px); }
button.primary:disabled, button.ghost:disabled { opacity: .45; cursor: not-allowed; transform: none; }
button.primary:disabled { box-shadow: none; }

.progress {
  flex: 1; min-width: 90px; height: 7px;
  border-radius: 999px; overflow: hidden;
  background: rgba(197, 229, 248, .6);
}
.progress i {
  display: block; height: 100%; width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pink), var(--blue), var(--mint));
  transition: width .15s;
}

.status { font-size: 13px; color: var(--ink-2); }
.status.err { color: #d9536f; }
.status.ok  { color: #1f8a63; }

.foot {
  max-width: 1440px; margin: 0 auto;
  padding: 6px 24px 30px;
  font-size: 12px; color: var(--ink-3);
}

/* 窄屏收一点留白 */
@media (max-width: 880px) {
  .topbar { padding: 13px 16px; }
  .layout { padding: 14px 16px; gap: 14px; }
  .foot { padding: 4px 16px 24px; }
}