:root{
  --bg: #0b0c0f;
  --panel: #12141a;
  --muted: #9aa3b2;
  --text: #e6e9ef;
  --primary: #6ea8fe;
  --primary-2: #407bff;
  --success: #34c38f;
  --danger: #ff6b6b;
  --warning: #f7b955;
  --border: #1f2330;
  --chip: #161a23;
  --shadow: 0 10px 30px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: radial-gradient(1200px 800px at 20% -10%, #1a1f2b 0%, #0b0c0f 60%) no-repeat, var(--bg);
  color:var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  letter-spacing:.2px;
}
.app{
  max-width:920px;
  margin:48px auto;
  padding:0 20px;
}
.app-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:20px;
}
.brand{display:flex;align-items:center;gap:14px}
.brand .logo{
  width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#407bff 0%,#6ea8fe 100%);display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;box-shadow:var(--shadow)
}
.brand h1{font-size:26px;margin:0;font-weight:700}
.header-actions{display:flex;gap:10px}
.icon-btn{
  height:40px;min-width:40px;padding:0 14px;border-radius:10px;border:1px solid var(--border);background:var(--chip);color:var(--text);cursor:pointer;transition:.2s;display:inline-flex;align-items:center;gap:8px;justify-content:center
}
.icon-btn:hover{border-color:#2b3142;transform:translateY(-1px)}
.composer{
  display:grid;
  grid-template-columns: 1fr 160px 140px 110px;
  gap:10px;
  background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)) , var(--panel);
  padding:16px;
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:var(--shadow);
}
.composer input,.composer select{
  height:44px;border-radius:10px;border:1px solid var(--border);background:#0f121a;color:var(--text);padding:0 12px;font-size:14px;outline:none
}
.composer .primary{
  height:44px;border-radius:10px;border:0;background:linear-gradient(135deg,var(--primary-2),var(--primary));color:#fff;font-weight:600;cursor:pointer;transition:.2s
}
.composer .primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.controls{
  display:flex;align-items:center;justify-content:space-between;margin:16px 2px 8px 2px
}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.chip{
  height:36px;border-radius:18px;border:1px solid var(--border);background:var(--chip);color:var(--text);padding:0 12px;cursor:pointer;transition:.2s;display:inline-flex;align-items:center
}
.chip.active{background:#1b2231;border-color:#2b3142}
.ghost{
  background:transparent;border:1px dashed var(--border);color:var(--muted);height:36px;border-radius:10px;padding:0 12px;cursor:pointer
}
.search{display:flex;gap:10px}
.search input{
  height:36px;border-radius:10px;border:1px solid var(--border);background:#0f121a;color:var(--text);padding:0 12px
}
.list-wrap{
  background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:12px;min-height:180px;box-shadow:var(--shadow)
}
.todo-list{list-style:none;margin:0;padding:4px}
.todo-item{
  display:grid;grid-template-columns: 28px 1fr auto auto;gap:12px;align-items:center;padding:12px;border-radius:12px;border:1px solid transparent;transition:.15s;background:transparent
}
.todo-item.dragging{opacity:.6}
.todo-item:hover{background:#141824;border-color:#1e2331}
.check{
  width:20px;height:20px;border-radius:6px;border:2px solid #3a4358;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s
}
.check[data-checked="true"]{background:linear-gradient(135deg,#34c38f,#2ea77c);border-color:transparent}
.title{
  font-size:15px;line-height:22px;color:var(--text);outline:none;border:0;background:transparent;padding:6px;border-radius:8px
}
.title.completed{color:#6e7890;text-decoration:line-through}
.meta{display:flex;gap:8px;align-items:center}
.badge{
  height:24px;padding:0 8px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;color:#cbd5e1;border:1px solid var(--border);background:#111621
}
.badge.high{background:rgba(255,107,107,.12);color:#ff8b8b;border-color:rgba(255,107,107,.28)}
.badge.normal{background:rgba(110,168,254,.12);color:#9bbdff;border-color:rgba(110,168,254,.28)}
.badge.low{background:rgba(52,195,143,.12);color:#7dd8b6;border-color:rgba(52,195,143,.28)}
.due{color:#9aa3b2;font-size:12px}
.item-actions{display:flex;gap:8px}
.icon{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:#0f121a;color:#cdd6f4;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:.15s
}
.icon:hover{border-color:#2b3142;transform:translateY(-1px)}
.handle{cursor:grab}
.empty{
  padding:18px;border-radius:12px;background:#10131b;color:#7b8496;text-align:center;border:1px dashed var(--border);display:none;margin:6px
}
.app-footer{
  display:flex;align-items:center;justify-content:space-between;color:#9aa3b2;margin-top:14px;padding:0 4px
}
.stats{font-size:13px}
@media(max-width:840px){
  .composer{grid-template-columns:1fr 1fr 120px}
  #newPriority{grid-column:2}
  #addBtn{grid-column:3}
  #newDue{grid-column:1}
}
@media(max-width:560px){
  .composer{grid-template-columns:1fr 110px}
  #newDue{display:none}
  #newPriority{grid-column:auto}
}
@media(prefers-color-scheme: light){
  :root{
    --bg:#f6f7fb;--panel:#fff;--text:#1b1e26;--muted:#64748b;--border:#e6e8ef;--chip:#f4f6fb;--shadow:0 10px 30px rgba(0,0,0,.06)
  }
  body{background: radial-gradient(1000px 700px at 10% -10%, #ffffff 0%, #f6f7fb 60%) no-repeat, var(--bg)}
  .check{border-color:#c5ccda}
  .chip.active{background:#eef2ff;border-color:#dbe3ff}
  .icon, .composer input, .composer select, .search input{background:#fff}
}
body.theme-dark{
  --bg:#0b0c0f;--panel:#12141a;--text:#e6e9ef;--muted:#9aa3b2;--border:#1f2330;--chip:#161a23;--shadow:0 10px 30px rgba(0,0,0,.3)
}