:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1d212b;
  --line: #2a2f3a;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #5b8cff;
  --must: #34d399;
  --defer: #fbbf24;
  --cut: #f87171;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #1a2030 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner { display: flex; align-items: center; gap: 16px; height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.logo { color: var(--accent); }
.brand-sub { color: var(--muted); font-size: 13px; }
.brand-sub b { color: var(--text); }

.hero { padding: 38px 0 18px; }
.hero h1 { font-size: 30px; margin: 0 0 10px; letter-spacing: -0.5px; }
.hero p { color: var(--muted); max-width: 760px; margin: 0 0 18px; }
.hero p b { color: var(--text); }

.preset-row { display: flex; flex-wrap: wrap; gap: 10px; }
.preset {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color .15s, transform .05s;
}
.preset:hover { border-color: var(--accent); }
.preset:active { transform: translateY(1px); }
.preset .tag { color: var(--accent); font-weight: 600; margin-right: 6px; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 10px; align-items: start; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 16px; margin: 0 0 14px; }
.card h2.mt { margin-top: 26px; }
.hint { color: var(--muted); font-size: 13px; margin: -6px 0 14px; }

.field { margin-bottom: 12px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.field input {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}
.field input:focus { outline: none; border-color: var(--accent); }

.feat-head, .feat-row {
  display: grid;
  grid-template-columns: 1fr 46px 56px 64px 64px 30px;
  gap: 8px;
  align-items: center;
}
.feat-head { font-size: 12px; color: var(--muted); padding: 0 2px 8px; }
.feat-head span { text-align: center; }
.feat-head .fh-name { text-align: left; }
.feat-row { margin-bottom: 8px; }
.feat-row input[type="text"] {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
}
.feat-row input[type="text"]:focus { outline: none; border-color: var(--accent); }
.chk { display: flex; justify-content: center; }
.chk input { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }
.feat-row select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 7px 6px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
.del {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}
.del:hover { color: var(--cut); }

.btn {
  border-radius: 9px;
  border: 1px solid var(--line);
  padding: 10px 16px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: transform .05s, border-color .15s, background .15s;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #0b0f1a; font-weight: 700; }
.btn.primary:hover { background: #74a0ff; }
.btn.ghost { background: transparent; color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); }
.btn.small { padding: 6px 12px; font-size: 13px; }
#addFeat { margin-top: 4px; }
.actions { display: flex; gap: 10px; margin-top: 20px; }

.result-head { display: flex; justify-content: space-between; align-items: center; }
.placeholder { color: var(--muted); }

.boundary {
  background: linear-gradient(180deg, #1b2436, #161b27);
  border: 1px solid #2c3a55;
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 18px;
  font-size: 14.5px;
}
.boundary .lbl { color: var(--accent); font-weight: 700; font-size: 12px; letter-spacing: .5px; display: block; margin-bottom: 4px; }

.tallies { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.tally { flex: 1; min-width: 90px; text-align: center; border-radius: 10px; padding: 10px; border: 1px solid var(--line); background: var(--panel-2); }
.tally .n { font-size: 24px; font-weight: 800; }
.tally .t { font-size: 12px; color: var(--muted); }
.tally.must .n { color: var(--must); }
.tally.defer .n { color: var(--defer); }
.tally.cut .n { color: var(--cut); }

.bucket { margin-bottom: 18px; }
.bucket h3 { font-size: 14px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.must { background: var(--must); }
.dot.defer { background: var(--defer); }
.dot.cut { background: var(--cut); }

.item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: 9px;
  padding: 10px 12px;
  margin-bottom: 8px;
  background: var(--panel-2);
}
.item.must { border-left-color: var(--must); }
.item.defer { border-left-color: var(--defer); }
.item.cut { border-left-color: var(--cut); }
.item .nm { font-weight: 600; font-size: 14px; }
.item .rs { color: var(--muted); font-size: 13px; margin-top: 3px; }
.item .warn { color: var(--defer); font-size: 12.5px; margin-top: 4px; }
.tags { margin-top: 5px; display: flex; gap: 6px; flex-wrap: wrap; }
.tagchip { font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; }
.tagchip.hot { color: var(--accent); border-color: #34406a; }

.metrics { margin-top: 6px; }
.metric { border-bottom: 1px dashed var(--line); padding: 8px 0; font-size: 13.5px; }
.metric:last-child { border-bottom: none; }
.metric b { color: var(--text); }

.warns { margin-top: 14px; border: 1px solid #4a3a1a; background: #241d10; border-radius: 10px; padding: 10px 14px; }
.warns h3 { font-size: 13px; margin: 0 0 6px; color: var(--defer); }
.warns li { font-size: 13px; color: #e9d9b8; margin-bottom: 4px; }

.empty { color: var(--muted); font-size: 13px; }

.how { margin: 34px 0 10px; }
.how h2 { font-size: 16px; }
.how ul { color: var(--muted); padding-left: 20px; }
.how ul b { color: var(--text); }
.how .src { color: #6f7888; font-size: 12.5px; margin-top: 10px; }

.foot { border-top: 1px solid var(--line); margin-top: 30px; padding: 18px 0; color: var(--muted); font-size: 12.5px; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--must); color: #062018; font-weight: 700;
  padding: 10px 20px; border-radius: 999px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 50;
}
.toast.show { opacity: 1; }

@media (max-width: 880px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 25px; }
  .feat-head { display: none; }
  .feat-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px;
    background: var(--panel-2);
  }
  .feat-row input[type="text"] { grid-column: 1 / 3; background: var(--panel); }
  .chk { justify-content: flex-start; gap: 6px; }
  .chk::after { content: attr(data-lbl); font-size: 12px; color: var(--muted); }
  .feat-row select { background: var(--panel); }
  .del { grid-column: 1 / 3; text-align: right; }
}