:root{
  color-scheme: light;
  --bg: #ffffff;
  --fg: #0b1220;
  --muted: #5c667a;
  --card: #f6f7fb;
  --border: rgba(15, 23, 42, 0.10);
  --accent: #f38020;
  --accent2: #0070f3;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.10);
  --radius: 14px;
}

html[data-theme="dark"]{
  color-scheme: dark;
  --bg: #0b0f1a;
  --fg: #e9eefc;
  --muted: #a7b0c6;
  --card: rgba(255,255,255,0.06);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

*{ box-sizing: border-box; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.container{
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  border-bottom: 1px solid var(--border);
}

.topbar__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand__title{
  font-weight: 800;
  letter-spacing: 0.2px;
}

.brand__sub{
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.actions{
  display: flex;
  gap: 10px;
}

main{
  padding: 22px 0 60px;
  display: grid;
  gap: 16px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.h1{ margin: 0 0 6px; font-size: 22px; }
.h2{ margin: 0 0 10px; font-size: 18px; }
.muted{ color: var(--muted); }
code{ background: color-mix(in srgb, var(--fg) 10%, transparent); padding: 2px 6px; border-radius: 6px; }

.grid{
  display: grid;
  gap: 12px;
}

.field{
  display: grid;
  gap: 6px;
}
.field__label{ font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="file"]{
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, var(--card));
  color: var(--fg);
  outline: none;
}

input[type="checkbox"]{
  width: 16px;
  height: 16px;
  accent-color: var(--accent2);
}
input:focus{
  border-color: color-mix(in srgb, var(--accent2) 60%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent2) 18%, transparent);
}

.row{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.row--between{ justify-content: space-between; }

.btn{
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--accent) 60%, var(--border));
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 86%, #fff), color-mix(in srgb, var(--accent2) 55%, #fff));
  color: #0b1220;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
}
.btn--ghost{
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}

.list{
  display: grid;
  gap: 10px;
}
.item{
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, var(--card));
}
.item__meta{
  display: grid;
  gap: 3px;
}
.item__title{
  font-weight: 750;
}
.item__sub{
  font-size: 12px;
  color: var(--muted);
  word-break: break-all;
}

.pre{
  margin: 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #111827;
  color: #dbeafe;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.55;
}

.footer{
  padding: 18px 0 30px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px){
  .topbar__inner{ flex-direction: column; align-items: flex-start; }
  .item{ grid-template-columns: 1fr; }
  .actions{ width: 100%; }
  .actions .btn{ flex: 1; }
}