:root{
  --red:#ff2e4d; --red2:#ff5a73; --ink:#1a1a1a; --sub:#8a8a92;
  --line:#ececed; --bg:#f5f5f7; --card:#fff; --chip:#f3f3f5;
  --radius:16px; --shadow:0 2px 14px rgba(0,0,0,.05);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--ink); font-size:15px; line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.app{max-width:520px;margin:0 auto;min-height:100vh;background:var(--bg);
  display:flex;flex-direction:column;position:relative}

/* Topbar */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;
  justify-content:space-between;padding:12px 16px;
  padding-top:calc(12px + env(safe-area-inset-top));
  background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.logo{font-size:24px}
.brand-txt strong{display:block;font-size:16px;line-height:1.1}
.brand-txt small{color:var(--sub);font-size:11px}
.ghost-btn{background:var(--chip);border:none;color:var(--ink);font-size:13px;
  padding:7px 14px;border-radius:20px;font-weight:600}
.ghost-btn:active{background:#e7e7ea}

/* Scroll area */
.scroll{flex:1;overflow-y:auto;padding:14px 14px 0;-webkit-overflow-scrolling:touch}

/* Cards */
.card{background:var(--card);border-radius:var(--radius);padding:16px;
  margin-bottom:12px;box-shadow:var(--shadow)}
.card-h{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;
  margin-bottom:12px}
.card-h .hint{color:var(--sub);font-weight:400;font-size:12px;margin-left:auto}
.step{display:inline-flex;align-items:center;justify-content:center;min-width:22px;
  height:22px;padding:0 6px;background:linear-gradient(135deg,var(--red),var(--red2));
  color:#fff;border-radius:11px;font-size:12px;font-weight:700}

.field-label{font-size:13px;color:var(--sub);margin:10px 0 8px;font-weight:600}
.field-label:first-of-type{margin-top:0}
.hint-inline{color:#b8b8bf;font-weight:400;font-size:11px;margin-left:6px}

/* Footer link to guide */
.site-foot{text-align:center;padding:6px 8px 4px}
.foot-link{display:inline-block;color:var(--red);font-weight:700;font-size:14px;
  text-decoration:none;padding:6px 4px}
.foot-link:active{opacity:.7}
.foot-sub{font-size:11.5px;color:var(--sub);margin-top:2px}

/* Inputs */
.text-input{width:100%;border:1px solid var(--line);background:#fafafa;border-radius:12px;
  padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);outline:none}
.text-input:focus{border-color:var(--red);background:#fff}
.text-input.area{min-height:76px;resize:vertical;line-height:1.6}

/* Chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 14px;background:var(--chip);border-radius:20px;font-size:13.5px;
  color:#3a3a3a;border:1.5px solid transparent;user-select:none;transition:.12s}
.chip:active{transform:scale(.96)}
.chip.on{background:#fff0f2;border-color:var(--red);color:var(--red);font-weight:600}

/* Photos */
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.photo-add{display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;aspect-ratio:1;border:1.5px dashed #d5d5da;border-radius:12px;color:var(--sub);
  font-size:12px;background:#fafafa}
.photo-add:active{background:#f0f0f2}
.photo-add .plus{font-size:26px;line-height:1;font-weight:300}
.photo-item{position:relative;aspect-ratio:1;border-radius:12px;overflow:hidden;background:#eee}
.photo-item img{width:100%;height:100%;object-fit:cover;display:block}
.photo-del{position:absolute;top:4px;right:4px;width:22px;height:22px;border:none;
  background:rgba(0,0,0,.55);color:#fff;border-radius:50%;font-size:14px;line-height:22px;
  padding:0;display:flex;align-items:center;justify-content:center}

/* Results */
.result-wrap{margin-top:4px}
.result-title{font-weight:700;font-size:16px;margin:6px 4px 12px}
.res-card{background:var(--card);border-radius:var(--radius);padding:16px;margin-bottom:12px;
  box-shadow:var(--shadow);border:1px solid var(--line)}
.res-tag{display:inline-block;font-size:11px;font-weight:700;color:var(--red);
  background:#fff0f2;padding:3px 10px;border-radius:12px;margin-bottom:10px}
.res-title{font-weight:700;font-size:15.5px;margin-bottom:8px;line-height:1.45}
.res-body{white-space:pre-wrap;font-size:14.5px;line-height:1.72;color:#2a2a2a}
.res-hash{margin-top:10px;color:#3a6ea5;font-size:13.5px;word-break:break-all}
.res-actions{display:flex;gap:8px;margin-top:14px}
.copy-btn{flex:1;border:none;background:linear-gradient(135deg,var(--red),var(--red2));
  color:#fff;font-weight:700;font-size:14px;padding:11px;border-radius:12px}
.copy-btn:active{opacity:.85}
.copy-btn.done{background:#22b06b}

/* Images section */
.images-section{margin-top:6px}
.img-tip{font-size:12.5px;color:var(--sub);background:#fff7e6;border:1px solid #ffe4b3;
  padding:9px 12px;border-radius:10px;margin-bottom:12px}
.img-tip b{color:#c47d00}
.imgblock{margin-bottom:14px}
.imgblock-h{font-size:13px;color:var(--sub);font-weight:600;margin:0 2px 8px}
.img-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.img-card{background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);
  border:1px solid var(--line)}
.img-card .gen-img{width:100%;display:block;aspect-ratio:3/4;object-fit:cover;background:#eee}
.img-card .img-bar{display:flex;align-items:center;justify-content:space-between;padding:7px 9px;gap:6px}
.img-card .img-label{font-size:11px;color:var(--sub);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.img-save{border:none;background:var(--chip);color:var(--ink);font-size:12px;font-weight:600;
  padding:6px 12px;border-radius:16px;flex:none}
.img-save:active{background:#e7e7ea}
.img-save.done{background:#22b06b;color:#fff}
.no-photo-tip{font-size:13px;color:var(--sub);background:var(--card);border:1px dashed #d5d5da;
  border-radius:12px;padding:14px;text-align:center;margin-top:4px}
.sample-cover{width:100%;display:block;border-radius:12px;margin-bottom:12px;background:#eee;
  aspect-ratio:3/4;object-fit:cover}

/* Header actions */
.top-actions{display:flex;gap:8px}
.sheet-h-btns{display:flex;gap:8px}

/* History */
.hist-empty{text-align:center;color:var(--sub);font-size:14px;padding:40px 0}
.hist-day{font-size:12px;color:var(--sub);font-weight:700;margin:14px 4px 8px;letter-spacing:.5px}
.hist-day:first-child{margin-top:2px}
.hist-card{background:var(--card);border-radius:14px;box-shadow:var(--shadow);
  border:1px solid var(--line);padding:12px 14px;margin-bottom:10px}
.hist-head{display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding-bottom:8px;margin-bottom:6px;border-bottom:1px solid var(--line)}
.hist-meta{font-size:12.5px;color:#555;font-weight:600;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.hist-del{flex:none;border:none;background:transparent;color:var(--red);font-size:12.5px;
  font-weight:600;padding:4px 6px}
.hist-del:active{opacity:.6}
.hist-row{display:flex;align-items:center;gap:10px;padding:6px 0}
.hist-row-info{flex:1;min-width:0;display:flex;align-items:baseline;gap:6px}
.hist-style{flex:none;font-size:10.5px;font-weight:700;color:var(--red);
  background:#fff0f2;padding:2px 7px;border-radius:9px}
.hist-title{font-size:13.5px;color:#2a2a2a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hist-copy{flex:none;border:none;background:var(--chip);color:var(--ink);font-size:12px;
  font-weight:600;padding:6px 14px;border-radius:16px}
.hist-copy:active{background:#e7e7ea}
.hist-copy.done{background:#22b06b;color:#fff}

/* Skeleton */
.skel{background:var(--card);border-radius:var(--radius);padding:16px;margin-bottom:12px;
  box-shadow:var(--shadow)}
.skel-line{height:12px;border-radius:6px;margin:10px 0;
  background:linear-gradient(90deg,#eee 25%,#f5f5f5 37%,#eee 63%);
  background-size:400% 100%;animation:shim 1.2s ease infinite}
@keyframes shim{0%{background-position:100% 0}100%{background-position:0 0}}

/* Gen bar */
.foot-space{height:20px}
.genbar{position:sticky;bottom:0;z-index:15;padding:12px 14px;
  padding-bottom:calc(12px + env(safe-area-inset-bottom));
  background:linear-gradient(180deg,rgba(245,245,247,0),var(--bg) 30%)}
.gen-btn{width:100%;border:none;border-radius:16px;padding:15px;
  background:linear-gradient(135deg,var(--red),var(--red2));color:#fff;
  font-size:16px;font-weight:700;box-shadow:0 6px 18px rgba(255,46,77,.32)}
.gen-btn:active{transform:translateY(1px)}
.gen-btn:disabled{opacity:.6}

/* Sheet */
.sheet{position:fixed;inset:0;z-index:40;display:none;align-items:flex-end;justify-content:center}
.sheet.open{display:flex}
.sheet-mask{position:absolute;inset:0;background:rgba(0,0,0,.4)}
.sheet-body{position:relative;width:100%;max-width:520px;max-height:86vh;overflow-y:auto;
  background:var(--bg);border-radius:20px 20px 0 0;padding:16px 14px;
  padding-bottom:calc(20px + env(safe-area-inset-bottom));animation:up .25s ease}
@keyframes up{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-h{display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;padding-bottom:12px;margin-bottom:4px}
.sheet-h strong{font-size:16px}

/* Toast */
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);z-index:60;
  background:rgba(0,0,0,.82);color:#fff;padding:10px 18px;border-radius:22px;
  font-size:14px;font-weight:600;animation:fade .2s ease}
@keyframes fade{from{opacity:0;transform:translate(-50%,6px)}to{opacity:1;transform:translate(-50%,0)}}