/* ==========================================================
   图片合成工具 · 三列分屏布局
   第1列 上：画布预览 / 下：文本识别栏
   第2列 图层管理   |   第3列 功能区（画布设置）
   ========================================================== */

/* 配色直接照 iOS 的系统语义色来，不自己调一套「好看的蓝」：
   系统语义色的好处是深色模式、增强对比度都有现成的对应值，不是拍脑袋。 */
:root{
  --bg:#ECECF1;                                  /* systemGroupedBackground */
  --panel:#FFFFFF;                               /* secondarySystemGroupedBackground */
  --line:rgba(60,60,67,.16);                     /* separator */
  --line-2:rgba(60,60,67,.10);                   /* 更淡的分隔 */
  --text:#1C1C1E;                                /* label */
  --text-2:#6C6C70;                              /* secondaryLabel */
  --text-3:#8E8E93;                              /* tertiaryLabel */
  --primary:#007AFF;                             /* systemBlue */
  --primary-soft:rgba(0,122,255,.10);
  --accent:#34C759;                              /* systemGreen */
  --danger:#FF3B30;                              /* systemRed */
  --fill:rgba(120,120,128,.14);                   /* tertiarySystemFill：控件底 */
  --fill-2:rgba(120,120,128,.22);
  --radius:12px;
  /* iOS 的卡片几乎不靠投影分层，靠白面与灰底的差；投影只负责「浮起来」的那一点 */
  --shadow:0 1px 3px rgba(0,0,0,.05), 0 6px 20px rgba(0,0,0,.04);
  /* 导航栏材质：半透明白 + 强饱和模糊，内容从下面透上来（不是刷一条实色） */
  --bar-bg:rgba(249,249,249,.78);
  --bar-blur:saturate(180%) blur(20px);
  /* 按下那一帧就要有反应，所以过渡极短、曲线偏「立刻起步」 */
  --press:90ms cubic-bezier(.2,.7,.3,1);
  --ease-out:cubic-bezier(.32,.72,0,1);
}

*{box-sizing:border-box;}
[hidden]{display:none !important;}

html,body{height:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  /* 先用系统字体：它自带光学尺寸、字距表和可读性调优，比任何自定义字都稳 */
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:13px;
  line-height:1.5;
  font-optical-sizing:auto;
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}

/* 按下的反馈：不等 click，手指/鼠标一压就有形变 */
.btn:active,.mini-btn:active,.ratio-btn:active,.preset-row button:active,
.icon-btn:active,.toggle-btn:active,.align-group button:active,.tab:active,
.modal-close:active,.layer-ops button:active,.grid-item:active,.link-btn:active{
  transform:scale(.97);
  transition:transform var(--press);
}
/* 移动端别留那 300ms 的双击等待，也别有灰色高亮块 */
button,summary,a,label,.layer-row,.grid-item{
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
/* 键盘走位时看得见焦点，用鼠标时不打扰 */
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
input:focus-visible,textarea:focus-visible,select:focus-visible{outline:none;}

/* ================= 总体骨架：三列 ================= */
.app{
  height:100vh;
  max-width:1440px;
  margin:0 auto;
  display:grid;
  --col-left:clamp(272px, 32%, 460px);     /* 画布预览列，宽度封顶，不再吃满 */
  --col-narrow:clamp(286px, 24%, 340px);   /* 图层列：固定窄栏，不随窗口抻开 */
  --pad:10px;                              /* 四周留白 */
  --bar-h:56px;                            /* 导航栏高度 */
  grid-template-columns:var(--col-left) var(--col-narrow) minmax(0,1fr);
  grid-template-rows:var(--bar-h) minmax(0,1fr);
  grid-template-areas:
    "head head head"
    "left layers inspector";
  gap:10px;
  padding:0 var(--pad) var(--pad);         /* 顶上不留白：导航栏要顶到窗口边缘 */
}

/* 第 1 列：画布在上，文本识别栏在下 */
.col-left{
  grid-area:left;
  min-width:0;min-height:0;
  display:flex;flex-direction:column;
  gap:10px;
}

/* ================= 顶栏：iOS 导航栏 ================= */
/* 贴顶通栏 + 半透明材质，内容从它下面透上来；底边一条发丝线，不是一整块色板。
   负 margin 抵消 .app 的 10px 内边距，让它真正顶到窗口边缘。 */
.topbar{
  grid-area:head;
  align-self:start;
  height:var(--bar-h);
  margin:0 calc(var(--pad) * -1);          /* 吃掉左右留白，真正通栏 */
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:0 20px;
  background:var(--bar-bg);
  backdrop-filter:var(--bar-blur);
  -webkit-backdrop-filter:var(--bar-blur);
  border-bottom:1px solid var(--line);
  color:var(--text);
}
.brand{display:flex;align-items:center;gap:11px;min-width:0;}

/* 品牌图标：一块纯粹的圆角方块，不要 emoji 也不要渐变横幅 */
.brand-icon{
  width:30px;height:30px;flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:8px;
  background:var(--primary);
  box-shadow:0 1px 2px rgba(0,0,0,.12);
}
.brand-icon svg{width:17px;height:17px;display:block;}

.brand-text h1{
  margin:0;font-size:16px;font-weight:600;color:var(--text);
  letter-spacing:-.016em;line-height:1.25;
}
.brand-text p{
  margin:1px 0 0;font-size:11px;color:var(--text-3);
  letter-spacing:.006em;line-height:1.3;
}
.topbar-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto;}

/* ================= 排版：字距跟着字号走 ================= */
/* 大字默认看着字距偏松，收一点；小字反过来要放一点，靠字重补回可读性 */
.brand-text h1,.panel-head h2,.stage-head h2,.card-head h3,.modal-head h3{
  letter-spacing:-.006em;line-height:1.28;
}
.brand-text h1{letter-spacing:-.012em;}
.hint,.panel-foot,.stage-foot,.paste-hint,.layer-meta,.fold-tag,.inspector-foot,.field>label,.modal-foot{
  letter-spacing:.012em;
}
.panel-foot,.stage-foot,.hint{font-weight:500;}
/* 数字要能对齐着看：等宽数位，别让 1080 和 810 的位数乱跳 */
#canvasInfo,#exportInfo,.count,.field>label b,.layer-meta,.num-wrap input{font-variant-numeric:tabular-nums;}

/* ================= 按钮 ================= */
/* iOS 只有两种按钮：淡色（灰底蓝字，次要）和实心（蓝底白字，主要）。
   不给每个按钮都描一圈边——描边多了整页会变成线框图。 */
.btn{
  border:0;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;
  font-weight:500;
  font-family:inherit;
  padding:8px 14px;
  border-radius:10px;
  cursor:pointer;
  transition:background 120ms var(--ease-out), transform var(--press);
  white-space:nowrap;
}
.btn:hover{background:rgba(0,122,255,.16);}
.btn-sm{padding:6px 12px;font-size:12.5px;border-radius:9px;}
/* 导航栏上的按钮用灰底：磨砂底是灰白的，淡蓝在上面会发浑 */
.topbar .btn{background:var(--fill);}
.topbar .btn:hover{background:var(--fill-2);}
.topbar .btn-accent,.topbar .btn-accent:hover{background:var(--primary);}
.topbar .btn-accent:hover{background:#0071E3;}
/* 带图标的按钮：图标走线形（SF Symbols 那种），不用彩色 emoji——emoji 一放进来，质感立刻掉一档 */
.btn-icon{display:inline-flex;align-items:center;gap:6px;padding-left:12px;padding-right:14px;}
.btn-icon svg{
  width:15px;height:15px;flex:0 0 auto;
  fill:none;stroke:currentColor;stroke-width:1.9;
  stroke-linecap:round;stroke-linejoin:round;
}
/* 面板里的「识别 / 清空」这类主操作：淡蓝底蓝字，比灰色更强调但不抢实心按钮 */
.btn-primary{
  background:var(--primary-soft);color:var(--primary);font-weight:600;
}
.btn-primary:hover{background:rgba(0,122,255,.16);}
/* 唯一一个实心按钮：复制图片。整页只在这一个地方用满蓝，视线自然落上去 */
.btn-accent{
  background:var(--primary);color:#fff;font-weight:600;
  box-shadow:0 1px 2px rgba(0,0,0,.10);
}
.btn-accent:hover{background:#0071E3;}
.btn-danger{color:var(--danger);background:rgba(255,59,48,.10);}
.btn-danger:hover{background:rgba(255,59,48,.16);}

/* 小的行内按钮也走同一个体系，不再用虚线框（虚线在 iOS 里是「拖放区」的语义） */
.mini-btn{
  margin-left:auto;
  border:0;background:var(--fill);color:var(--primary);
  font-size:11.5px;font-weight:500;font-family:inherit;
  padding:5px 10px;border-radius:8px;cursor:pointer;
  transition:background 120ms var(--ease-out), transform var(--press);
}
.mini-btn:hover{background:var(--fill-2);}
.mini-btn.active{background:var(--primary-soft);color:var(--primary);}

/* 同步 / 标名这类开关：关着是灰底，开着是绿底绿字（iOS 里「已启用」就是绿） */
.equal-btn{white-space:nowrap;}
.equal-btn.on{
  background:rgba(52,199,89,.14);
  color:#248A3D;font-weight:600;
}
.equal-btn.on:hover{background:rgba(52,199,89,.20);color:#248A3D;}
.link-btn{
  border:0;background:none;color:var(--text-3);font-size:11.5px;
  font-family:inherit;cursor:pointer;padding:4px 2px;
}
.link-btn:hover{color:var(--danger);}

@font-face{
  font-family:'Noto Sans SC Web';
  src:url('../fonts/NotoSansSC-subset.woff2') format('woff2');
  font-weight:100 900;
  font-style:normal;
  font-display:swap;
}
@font-face{
  font-family:'Smiley Sans';
  src:url('../fonts/SmileySans-Oblique.woff2') format('woff2');
  font-weight:400 900;
  font-style:normal;
  font-display:swap;
}

/* ================= 面板通用 ================= */
.panel{
  background:var(--panel);
  border:0;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  display:flex;
  flex-direction:column;
  min-height:0;
  overflow:hidden;
}
.panel-head{
  display:flex;align-items:center;gap:8px;
  padding:12px 14px 10px;
  border-bottom:1px solid var(--line-2);
  flex:0 0 auto;
}
.panel-head h2{margin:0;font-size:13px;font-weight:600;letter-spacing:.2px;}
.head-actions{margin-left:auto;display:flex;align-items:center;gap:5px;}
.head-actions .mini-btn{margin-left:0;padding:5px 8px;white-space:nowrap;}
.head-actions .link-btn{margin-left:2px;padding:4px 2px;flex:0 0 auto;white-space:nowrap;}
/* 图层头四个元素并排，窄到放不下时整组换行，不硬挤 */
.layers-panel .panel-head{flex-wrap:wrap;row-gap:6px;gap:6px;}
.layers-panel .head-actions{gap:4px;}
.layers-panel .head-actions .mini-btn{padding:5px 7px;}
.layers-panel .head-actions .link-btn{margin-left:0;padding:4px 1px;}
.count{
  min-width:20px;height:18px;padding:0 6px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);
  border-radius:9px;font-size:11px;font-weight:700;
}
.panel-foot{
  flex:0 0 auto;
  padding:8px 14px;
  border-top:1px solid var(--line-2);
  font-size:11px;color:var(--text-3);
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
}
.sep{color:#C7C7CC;}

/* ================= 第 2 列：图层列表 ================= */
.layers-panel{grid-area:layers;}
/* 滚动边缘：真的滚到标题栏底下了才浮出一层阴影，没滚动就只是一条发丝线 */
.layers-panel .panel-head{
  border-bottom-color:var(--line-2);
  transition:box-shadow 180ms var(--ease-out);
}
.layers-panel.scrolled .panel-head{box-shadow:0 10px 14px -12px rgba(0,0,0,.55);}
.layers-list{
  flex:1 1 auto;
  overflow-y:auto;
  padding:8px;
  min-height:0;
}
.empty-layers{
  padding:36px 12px;
  text-align:center;
  color:var(--text-3);
  font-size:12px;
  line-height:1.9;
}

.layer-row{
  display:flex;
  align-items:center;
  gap:9px;
  padding:7px 8px;
  border-radius:9px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .12s,border-color .12s;
  position:relative;
}
.layer-row:hover{background:var(--fill);}
.layer-row.active{background:var(--primary-soft);}
.layer-row.hidden .layer-thumb,
.layer-row.hidden .layer-main{opacity:.42;}
.layer-row.dragging{opacity:.45;background:#F2F2F7;}

.layer-thumb{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:7px;
  border:0;
  background:#fff;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);
  overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.layer-thumb img{width:100%;height:100%;object-fit:contain;display:block;}
.layer-thumb.thumb-text{
  background:#F2F2F7;color:#8E8E93;font-size:15px;font-weight:700;
  font-family:Georgia,serif;
}

.layer-main{flex:1 1 auto;min-width:0;}
.layer-name{
  font-size:12.5px;font-weight:600;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  line-height:1.4;
}
.layer-meta{font-size:10.5px;color:var(--text-3);margin-top:1px;}

.layer-ops{
  position:absolute;right:5px;top:50%;transform:translateY(-50%);
  display:flex;gap:1px;
  padding-left:14px;
  background:linear-gradient(90deg,rgba(255,255,255,0),#fff 26%);
  opacity:0;transition:opacity .12s;
  pointer-events:none;
}
.layer-row:hover .layer-ops{opacity:1;pointer-events:auto;}
.layer-row.active .layer-ops{
  opacity:1;pointer-events:auto;
  background:linear-gradient(90deg,rgba(239,244,255,0),var(--primary-soft) 26%);
}
.layer-ops button{
  width:22px;height:22px;
  border:0;background:none;border-radius:5px;
  color:var(--text-2);font-size:11px;line-height:1;
  cursor:pointer;padding:0;
}
.layer-ops button:hover{background:rgba(0,122,255,.14);color:var(--primary);}
.layer-ops button[data-act="del"]:hover{background:rgba(255,59,48,.14);color:var(--danger);}

/* 拖拽：插到上面/下面（蓝线） */
.layer-row.drop-target{box-shadow:inset 0 2px 0 var(--primary);}
.layer-row.drop-target::before{
  content:"";position:absolute;left:6px;right:6px;top:-1px;height:2px;
  background:var(--primary);border-radius:2px;
}

/* 拖着文字停在图标行中间＝挂成子集（绿） */
.layer-row.drop-bind{
  border-color:#34C759;background:rgba(52,199,89,.14);
  box-shadow:inset 0 0 0 1.5px #34C759;
}
.layer-row.drop-bind .layer-ops{opacity:0 !important;pointer-events:none;}
.layer-row.drop-bind::after{
  content:"挂到下面";
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-size:10px;font-weight:700;color:#1E6B2E;background:rgba(52,199,89,.26);
  padding:2px 7px;border-radius:6px;white-space:nowrap;
}

/* 挂在图标下面的文字：缩进一级，一根小折线连着上面的图标 */
.layer-row.is-child{margin-left:18px;}
.layer-row.is-child::before{
  content:"";
  position:absolute;left:-12px;top:-8px;height:calc(50% + 8px);
  width:8px;
  border-left:1.5px solid rgba(60,60,67,.24);
  border-bottom:1.5px solid rgba(60,60,67,.24);
  border-bottom-left-radius:7px;
  pointer-events:none;
}
.layer-row.is-child .layer-thumb{width:30px;height:30px;flex-basis:30px;border-radius:7px;}
.layer-row.is-child .thumb-text{font-size:12px;}
.layer-row.is-child .layer-name{font-size:12px;color:var(--text-2);}

/* ================= 第 1 列上：画布预览 ================= */
.stage{
  flex:1 1 auto;
  min-height:230px;
  min-width:0;
  display:flex;flex-direction:column;
  background:
    linear-gradient(0deg,rgba(0,0,0,.03) 1px,transparent 1px) 0 0/100% 24px,
    linear-gradient(90deg,rgba(0,0,0,.03) 1px,transparent 1px) 0 0/24px 100%,
    #EFEFF4;
  border:0;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
  position:relative;
}
.stage-head{
  flex:0 0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:9px 12px 8px;
  border-bottom:1px solid var(--line-2);
  /* 浮动工具条：半透明 + 背景模糊，底下的内容从它下面透上来，而不是被一条实心带子截断 */
  background:rgba(255,255,255,.74);
  backdrop-filter:blur(14px) saturate(170%);
  -webkit-backdrop-filter:blur(14px) saturate(170%);
}
.stage-head h2{margin:0;font-size:12.5px;font-weight:600;letter-spacing:.2px;white-space:nowrap;}
.stage-head span{font-size:10.5px;color:var(--text-3);font-variant-numeric:tabular-nums;white-space:nowrap;}
.stage-head .head-actions{gap:7px;align-items:center;}

/* 画布头两枚小按钮：背景 / 清空（清空跟图层面板同款纯文字） */
.stage-head .head-actions .mini-btn{padding:4px 8px;font-size:11px;white-space:nowrap;}
.stage-head .head-actions .link-btn{
  padding:4px 2px;font-size:11px;margin-left:0;
  border:0;background:none;color:var(--text-3);
}
.stage-head .head-actions .link-btn:hover{color:var(--danger);}
.stage.drag-over::after{
  content:"松手导入图片";
  position:absolute;inset:8px;
  border:2px dashed var(--primary);
  border-radius:10px;
  background:rgba(0,122,255,.06);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);font-size:13px;font-weight:700;
  pointer-events:none;z-index:5;
}
.stage-inner{
  flex:1 1 auto;
  min-height:0;min-width:0;
  display:flex;align-items:center;justify-content:center;
  padding:10px;
}
#canvas{
  display:block;
  background:#fff;
  border-radius:4px;
  box-shadow:0 10px 30px rgba(0,0,0,.16), 0 1px 3px rgba(0,0,0,.1);
  cursor:default;
  touch-action:none;
}
#canvas.layer-hover{cursor:move;}
.stage-foot{
  flex:0 0 auto;
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
  padding:6px 12px;
  background:rgba(255,255,255,.74);
  backdrop-filter:blur(14px) saturate(170%);
  -webkit-backdrop-filter:blur(14px) saturate(170%);
  border-top:1px solid var(--line);
  font-size:10.5px;color:var(--text-2);
}
.stage-foot b{color:var(--primary);font-weight:600;}

/* ================= 第 1 列下：文本识别栏（粘 App 名字换图标/补图标） ================= */
/* 画布和文本识别栏按 6:4 分这一列的高度，识别栏不再被压成一小条 */
.paste-panel{
  flex:0 0 36%;
  min-height:186px;
  max-height:380px;
}
.paste-body{
  flex:1 1 auto;
  min-height:0;
  overflow:auto;
  padding:10px 12px 11px;
  display:flex;flex-direction:column;gap:7px;
}
#pasteInput{
  width:100%;
  flex:1 1 auto;
  min-height:96px;
  max-height:none;
  resize:none;
  font-family:inherit;font-size:12px;line-height:1.6;
  padding:7px 9px;border-radius:8px;
}
.paste-tools{display:flex;align-items:center;gap:6px;}
.paste-tools .btn{flex:0 0 auto;padding:6px 12px;}
.paste-hint{
  flex:1 1 auto;min-width:0;
  font-size:10.5px;color:var(--text-3);line-height:1.5;
}
.paste-hint.ok{color:#248A3D;}
.paste-hint.warn{color:var(--danger);}

/* ================= 第 3 列：设置面板（宽列，卡片按可用宽度自动分栏） ================= */
.inspector{
  grid-area:inspector;
  padding:10px;
  gap:10px;
  overflow-y:auto;
  align-content:start;
  align-items:start;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(268px,100%),1fr));
}
.card{
  border:0;
  border-radius:12px;
  padding:12px;
  background:#fff;
  box-shadow:var(--shadow);
}
.card-head{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  margin-bottom:10px;
}
.card-head h3{margin:0;font-size:12.5px;font-weight:600;}
.card-tag{
  font-size:11px;color:var(--text-2);
  max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
/* 没选中东西时的提示条：iOS 里这类说明就是一块淡灰底，不描蓝框（描框会看着像可输入的控件） */
#selectionCard{background:transparent;box-shadow:none;padding:2px 2px 4px;}
#selectionCard .card-head h3{font-size:12px;font-weight:500;color:var(--text-2);}
#selectionCard .hint{color:var(--text-2);}

.field{margin-bottom:11px;}
.field:last-child{margin-bottom:0;}
.field > label{
  display:flex;align-items:center;justify-content:space-between;
  font-size:11.5px;color:var(--text-2);margin-bottom:6px;
}
.field > label b{color:var(--primary);font-weight:700;}

.row{display:flex;align-items:center;gap:8px;}
.row-gap{flex-wrap:wrap;}
.arrange-row{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;}
.arrange-row .btn{padding:6px 2px;font-size:11.5px;}
/* 一键标名：跟上面那排排列按钮一样宽 */
#labelToggleBtn{width:100%;justify-content:center;background:var(--primary-soft);color:var(--primary);font-weight:600;}
#labelToggleBtn:hover{background:rgba(0,122,255,.16);}

input[type="text"],input[type="number"],textarea,select{
  font-family:inherit;
  font-size:12.5px;
  color:var(--text);
  background:var(--fill);
  border:1px solid transparent;
  border-radius:10px;
  padding:8px 10px;
  outline:none;
  transition:background 140ms var(--ease-out),border-color 140ms var(--ease-out),box-shadow 140ms var(--ease-out);
  width:100%;
}
input::placeholder,textarea::placeholder{color:var(--text-3);}
input:focus,textarea:focus,select:focus{
  background:#fff;
  border-color:rgba(0,122,255,.55);
  box-shadow:0 0 0 3px rgba(0,122,255,.14);
}
textarea{resize:vertical;line-height:1.5;min-height:58px;}

input[type="range"]{
  -webkit-appearance:none;appearance:none;
  flex:1 1 auto;min-width:0;height:4px;border-radius:3px;
  background:rgba(60,60,67,.10);outline:none;
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:14px;height:14px;border-radius:50%;
  background:#fff;border:2px solid var(--primary);
  box-shadow:0 1px 4px rgba(0,122,255,.35);
  cursor:pointer;
}
.num-wrap{display:flex;align-items:center;gap:4px;flex:0 0 auto;}
.num-wrap input{width:64px;text-align:center;padding:6px 4px;}
.num-wrap > span{font-size:11px;color:var(--text-3);}
.num-wrap .pre{color:var(--text-3);font-size:11px;}
.color-input{
  width:38px;height:30px;padding:2px;
  border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;flex:0 0 auto;
}

/* 预设按钮行 */
.preset-row{display:grid;grid-template-columns:repeat(6,1fr);gap:2px;margin-bottom:8px;padding:2px;background:var(--fill);border-radius:9px;}
.preset-row button{
  min-width:0;
  border:0;background:transparent;border-radius:7px;
  font-size:11px;font-family:inherit;color:var(--text);
  padding:4px 2px;cursor:pointer;
  transition:background 140ms var(--ease-out), box-shadow 140ms var(--ease-out), color 140ms;
}
.preset-row button:hover{color:var(--primary);}
.preset-row button.active{
  background:#fff;color:var(--text);font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,.10), 0 0 0 .5px rgba(0,0,0,.04);
}
#exportScaleRow{grid-template-columns:repeat(3,1fr);}
#exportScaleRow button{padding:6px 4px;}

/* 比例：iOS 分段控件（灰槽 + 白色滑块），不是五个描边小方块 */
.ratio-row{
  display:grid;grid-template-columns:repeat(5,1fr);
  gap:2px;padding:2px;background:var(--fill);border-radius:9px;
}
.ratio-btn{
  border:0;background:transparent;border-radius:7px;
  font-size:11.5px;font-family:inherit;color:var(--text);
  padding:7px 0;cursor:pointer;
  transition:background 140ms var(--ease-out), box-shadow 140ms var(--ease-out), color 140ms;
}
.ratio-btn:hover{color:var(--primary);}
.ratio-btn.active{
  background:#fff;color:var(--text);font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,.10), 0 0 0 .5px rgba(0,0,0,.04);
}

/* 文字对齐 / 粗体 */
.align-group{display:flex;gap:2px;border:0;border-radius:8px;padding:2px;background:var(--fill);}
.align-group button{
  width:28px;height:24px;border:0;background:transparent;border-radius:6px;
  color:var(--text-2);font-size:11px;cursor:pointer;
  transition:background 140ms var(--ease-out), color 140ms;
}
.align-group button.active{
  background:#fff;color:var(--text);
  box-shadow:0 1px 3px rgba(0,0,0,.10), 0 0 0 .5px rgba(0,0,0,.04);
}
.toggle-btn{
  width:32px;height:30px;border:0;border-radius:8px;
  background:var(--fill);font-weight:700;font-family:Georgia,serif;font-size:13px;
  color:var(--text-2);cursor:pointer;
  transition:background 140ms var(--ease-out), color 140ms;
}
.toggle-btn.active{background:var(--primary-soft);color:var(--primary);}

.hint{margin:6px 0 0;font-size:11px;color:var(--text-3);line-height:1.6;}
/* 缩放行里的重置按钮 */
.icon-btn{
  width:28px;height:28px;flex:0 0 auto;
  border:0;border-radius:8px;background:var(--fill);
  color:var(--text-2);font-size:14px;line-height:1;font-family:inherit;
  cursor:pointer;transition:all .12s;
}
.icon-btn:hover{border-color:rgba(60,60,67,.24);color:var(--primary);background:#F2F2F7;}

/* 可折叠分区（背景、外部工具） */
.fold{
  border:0;
  border-radius:10px;
  background:#fff;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.fold + .fold{margin-top:8px;}
.fold > summary{
  list-style:none;
  display:flex;align-items:center;justify-content:flex-start;gap:8px;
  padding:10px 12px;
  font-size:12px;font-weight:600;color:var(--text);
  cursor:pointer;
  user-select:none;
}
.fold > summary::-webkit-details-marker{display:none;}
.fold > summary::before{
  content:"▸";
  font-size:10px;color:var(--text-3);
  transition:transform .15s;
  margin-right:-2px;
}
.fold[open] > summary::before{transform:rotate(90deg);}
.fold > summary:hover{background:#F2F2F7;}
.fold-tag{
  margin-left:auto;
  font-weight:500;font-size:11px;color:var(--text-3);
  max-width:110px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.fold-body{padding:2px 12px 12px;border-top:1px solid var(--line-2);padding-top:10px;}

.link-row{display:flex;flex-direction:column;gap:7px;}
.link-row a{
  font-size:12px;color:var(--primary);text-decoration:none;
  padding:6px 9px;border:1px solid var(--line);border-radius:8px;
  transition:all .12s;
}
.link-row a:hover{background:#F2F2F7;border-color:rgba(60,60,67,.24);}

/* 本地文件夹 */
.folder-bar{
  display:flex;align-items:center;gap:8px;
  padding:8px 10px;margin-bottom:12px;
  background:#F2F2F7;border:1px solid var(--line);border-radius:9px;
  font-size:11.5px;color:var(--text-2);
}
.folder-bar #folderPath{
  flex:1 1 auto;min-width:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.folder-bar .btn{flex:0 0 auto;}
.folder-opt{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:4px;
  padding:2px 8px;border-radius:20px;background:#fff;border:1px solid var(--line);
  font-size:11px;color:var(--text-2);cursor:pointer;user-select:none;
}
.folder-opt input{margin:0;accent-color:var(--primary);cursor:pointer;}

/* ================= 等大（按钮态在 .equal-btn） ================= */

.inspector-foot{
  grid-column:1/-1;
  padding:4px 4px 2px;
  font-size:10.5px;color:var(--text-3);text-align:center;
}

/* ================= 图库弹窗 ================= */
.modal{
  position:fixed;inset:0;z-index:100;
  display:flex;
  align-items:center;justify-content:center;
  padding:24px;
  /* 关掉时先留着布局，退出动画放完再收起来（display:none 会把动画直接掐掉） */
  visibility:hidden;
  pointer-events:none;
}
.modal.open{visibility:visible;pointer-events:auto;}
.modal-backdrop{
  position:absolute;inset:0;
  /* 靠压暗 + 轻微虚化把背景「推远」，不是把整页糊成一片 */
  background:rgba(0,0,0,.42);
  backdrop-filter:blur(3px) saturate(115%);
  -webkit-backdrop-filter:blur(3px) saturate(115%);
  opacity:0;
  transition:opacity 240ms var(--ease-out);
}
.modal.open .modal-backdrop{opacity:1;}
.modal-panel{
  position:relative;
  width:min(760px,100%);
  max-height:min(84vh,760px);
  /* 大块面 = 更厚的材质：更强的模糊、更深的投影，顶边留一道高光 */
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(24px) saturate(180%);
  -webkit-backdrop-filter:blur(24px) saturate(180%);
  border:1px solid rgba(255,255,255,.72);
  border-radius:18px;
  box-shadow:0 32px 80px rgba(0,0,0,.34), inset 0 1px 0 rgba(255,255,255,.9);
  display:flex;flex-direction:column;
  overflow:hidden;
  will-change:transform,opacity,filter;
}
.modal-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 18px 12px;
  border-bottom:1px solid var(--line-2);
}
.modal-head h3{margin:0;font-size:14.5px;font-weight:700;}
.modal-close{
  border:0;background:none;font-size:16px;color:var(--text-3);
  cursor:pointer;width:28px;height:28px;border-radius:8px;
}
.modal-close:hover{background:#F2F2F7;color:var(--text);}
.modal-tabs{display:flex;gap:6px;padding:10px 18px 0;}
.modal-tabs .tab{
  border:0;background:none;
  font-family:inherit;font-size:12.5px;color:var(--text-2);
  padding:8px 12px;border-radius:8px 8px 0 0;cursor:pointer;
  border-bottom:2px solid transparent;
}
.modal-tabs .tab.active{color:var(--primary);font-weight:700;border-bottom-color:var(--primary);background:#F2F2F7;}
.modal-tabs .tab-tag{
  font-style:normal;font-size:10.5px;font-weight:400;
  margin-left:5px;padding:1px 6px;border-radius:20px;
  background:#F2F2F7;color:var(--text-2);
  max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  display:inline-block;vertical-align:1px;
}
.modal-search{display:flex;gap:8px;padding:12px 18px 8px;}
.modal-body{flex:1 1 auto;overflow-y:auto;padding:6px 18px 16px;min-height:180px;}
.tab-pane{display:none;}
.tab-pane.active{display:block;}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(84px,1fr));
  gap:10px;
}
.grid-item{
  border:1px solid var(--line);border-radius:11px;
  padding:8px 6px;background:#fff;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  cursor:pointer;transition:all .13s;
}
.grid-item:hover{border-color:rgba(60,60,67,.24);background:#F2F2F7;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,122,255,.1);}
.grid-item img{
  width:52px;height:52px;object-fit:contain;border-radius:10px;display:block;background:#fff;
}
.grid-item span{
  font-size:10.5px;color:var(--text-2);
  width:100%;text-align:center;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.empty{
  padding:34px 12px;text-align:center;color:var(--text-3);
  font-size:12px;line-height:1.9;
}
.loading{padding:34px;text-align:center;color:var(--text-3);font-size:12px;}

.dropzone{
  border:2px dashed rgba(60,60,67,.22);border-radius:12px;
  padding:26px;text-align:center;cursor:pointer;
  background:#FAFAFC;transition:all .15s;margin-bottom:14px;
}
.dropzone:hover,.dropzone.over{border-color:var(--primary);background:#F2F2F7;}
.dropzone .dz-icon{font-size:26px;}
.dropzone p{margin:6px 0 2px;font-size:12.5px;color:var(--text);}
.dropzone span{font-size:11px;color:var(--text-3);}

.modal-foot{
  flex:0 0 auto;
  padding:10px 18px;
  border-top:1px solid var(--line-2);
  background:#FAFAFC;
  font-size:11.5px;color:var(--text-2);
}

/* ================= toast ================= */
/* 位置和透明度由 JS 的弹簧来推，这里只给材质，不用 transition 抢方向盘 */
.toast{
  position:fixed;left:50%;bottom:26px;
  transform:translate(-50%,12px);
  background:rgba(0,0,0,.86);
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 10px 30px rgba(0,0,0,.26);
  color:#fff;font-size:12.5px;letter-spacing:.01em;
  padding:10px 18px;border-radius:11px;
  opacity:0;pointer-events:none;
  z-index:200;
  max-width:70vw;
}
.toast.show{opacity:1;transform:translate(-50%,0);}

/* ================= 滚动条 ================= */
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:#C7C7CC;border-radius:4px;border:2px solid transparent;background-clip:content-box;}
::-webkit-scrollbar-thumb:hover{background:#AEAEB2;background-clip:content-box;}
::-webkit-scrollbar-track{background:transparent;}

/* ================= 响应式：分屏优先，始终三列 ================= */
@media (max-width:1280px){
  .app{
    --col-left:clamp(266px, 31%, 398px);
    --col-narrow:clamp(282px, 25%, 328px);
    --pad:9px;
    gap:9px;
  }
  .col-left{gap:9px;}
}
@media (max-width:1080px){
  .app{
    --col-left:clamp(256px, 30%, 348px);
    --col-narrow:clamp(266px, 25%, 300px);
    --bar-h:52px;
    --pad:8px;
    gap:8px;
  }
  .col-left{gap:8px;}
  .brand-text p{display:none;}
  .grid{grid-template-columns:repeat(auto-fill,minmax(74px,1fr));}
}
@media (max-width:920px){
  .app{
    --col-left:248px;
    --col-narrow:236px;
    --pad:7px;
    gap:7px;
  }
  .col-left{gap:7px;}
  .inspector{padding:7px;gap:7px;}
  .card{padding:10px;}
  .layer-thumb{width:32px;height:32px;flex-basis:32px;}
  .layer-ops button{width:19px;height:19px;font-size:10px;}
  .topbar{padding:0 calc(var(--pad) + 4px);}
  .brand-icon{display:none;}
  .brand-text h1{font-size:14px;}
  .btn{padding:7px 9px;font-size:12px;}
  .stage-foot{font-size:10px;padding:5px 9px;}
  .stage-head{padding:7px 10px 6px;gap:6px;}
  .stage-head h2{font-size:11.5px;}
  .stage-head span{font-size:10px;}
  .stage-head .head-actions{gap:5px;}
  .stage-head .head-actions .mini-btn{padding:4px 6px;font-size:10.5px;}
  .stage-head .head-actions .link-btn{font-size:10.5px;}
  .stage-inner{padding:8px;}
  .paste-panel{min-height:0;}
  .paste-body{padding:9px;}
  /* 窄栏里提示占一行、按钮挪到下一行靠右，别挤成一坨 */
  .paste-tools{flex-wrap:wrap;justify-content:flex-end;gap:6px;}
  .paste-hint{flex:1 1 100%;}
}
@media (max-width:800px){
  .app{
    --col-left:224px;
    --col-narrow:218px;
    --pad:6px;
    gap:6px;
  }
  .col-left{gap:6px;}
  .preset-row button{font-size:10px;padding:5px 1px;}
  .ratio-btn{font-size:10.5px;padding:6px 0;}
  .layer-meta{display:none;}
  .panel-head{padding:9px 10px 8px;}
  .num-wrap input{width:52px;}
}
/* 手机竖屏：退化成上下堆叠，四块仍在 */
@media (max-width:680px){
  body{overflow:auto;}
  .app{
    height:auto;min-height:100vh;
    grid-template-columns:1fr;
    grid-template-rows:auto auto auto auto;
    grid-template-areas:
      "head"
      "left"
      "layers"
      "inspector";
  }
  .col-left{height:auto;}
  .stage{min-height:46vh;}
  .paste-panel{flex:0 0 auto;min-height:0;}
  .layers-panel,.inspector{max-height:56vh;}
  .topbar{height:auto;margin:0;padding:10px 12px;flex-wrap:wrap;gap:8px;border-radius:12px;}
  .topbar-actions{width:100%;}
  .topbar-actions .btn{flex:1 1 0;padding:8px 6px;}
}

/* 按下优先于悬停：网格项/预设按钮的 :hover 位移不能把按压反馈顶掉 */
.grid-item:active,.preset-row button:active,.ratio-btn:active{transform:scale(.97);}
/* 列表整行不缩放（会晃），改用背景色给反馈 */
.layer-row:active{background:#F2F2F7;}

/* ================= 无障碍：三种偏好各降一级，不是一刀切全关 ================= */
/* 减少动态效果：弹簧在 JS 里已经直接跳到终点，这里把剩下的过渡换成交叉淡入 */
@media (prefers-reduced-motion: reduce){
  .modal-backdrop{transition:opacity 120ms linear;}
  .toast{transition:none;}
  /* 位移/缩放全去掉，只留透明度的变化，信息还在，眩晕没了 */
  .btn:active,.mini-btn:active,.ratio-btn:active,.preset-row button:active,
  .icon-btn:active,.toggle-btn:active,.align-group button:active,
  .layer-ops button:active,.grid-item:active{transform:none;}
  .grid-item:hover{transform:none;}
}

/* 减少透明度（前庭敏感 / 低视力）：把磨砂做成不透的实色，模糊关掉 */
@media (prefers-reduced-transparency: reduce){
  .stage-head,.stage-foot{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none;}
  .modal-panel{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none;}
  .modal-backdrop{background:rgba(0,0,0,.52);backdrop-filter:none;-webkit-backdrop-filter:none;}
  .toast{background:#1C1C1E;backdrop-filter:none;-webkit-backdrop-filter:none;}
}

/* 需要更高对比度：边界画实，次要文字压深，别靠灰色去分层 */
@media (prefers-contrast: more){
  :root{
    --line:#9aa8bb;
    --line-2:#b6c2d2;
    --text-2:#475569;
    --text-3:#5a6a80;
  }
  .panel,.card,.fold,.stage,.btn,.mini-btn,.ratio-btn,.preset-row button,.toggle-btn,.icon-btn{
    border-color:#8E8E93;
  }
  .layer-row.active{outline:2px solid var(--primary);outline-offset:-2px;}
  .stage-head,.stage-foot,.modal-panel{background:#fff;}
  .hint,.panel-foot,.stage-foot,.layer-meta{color:#4a5a70;}
}