:root {
  color-scheme: light dark;
  --bg: #f6f6f3;
  --fg: #1c1d1b;
  --card: #ffffff;
  --line: #d9d9d1;
  --muted: #5c5f5a;
  --accent: #2c6b4a;
  --accent-fg: #ffffff;
  --err: #9d2b2f;
  --chip: #eef2ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181a;
    --fg: #ecedea;
    --card: #1e2326;
    --line: #36403f;
    --muted: #a4aca6;
    --accent: #7cc9a0;
    --accent-fg: #10231a;
    --err: #ff9c9c;
    --chip: #24312c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
main { max-width: 44rem; margin: 0 auto; padding: 1rem 1rem 2rem; }
header { margin-bottom: 1rem; }
h1 { font-size: 1.6rem; margin: 0.4rem 0 0.3rem; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 0 0 0.6rem; }
h3 { font-size: 1rem; margin: 1rem 0 0.35rem; }
.lead { margin: 0; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem 1.1rem;
  margin: 0 0 1rem;
}
label { display: block; font-weight: 600; margin-bottom: 0.35rem; }
textarea, input, button, select {
  font: inherit;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  padding: 0.5rem 0.6rem;
}
select { max-width: 100%; }
textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  resize: vertical;
  min-height: 8.5rem;
}
input[type="number"] { width: 6rem; }
input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
  padding: 0;
  accent-color: var(--accent);
  margin: 0;
}
#exclude { min-width: 13rem; }
button {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  padding: 0.5rem 0.9rem;
}
button.ghost { background: transparent; color: var(--fg); border-color: var(--line); font-weight: 500; }
button:hover { filter: brightness(1.06); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 0.7rem; }
.row label { margin: 0; font-weight: 500; color: var(--muted); font-size: 0.95rem; }
.row label.check {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.6rem;
  background: var(--bg);
}
.hint { color: var(--muted); font-size: 0.88rem; margin: 0.5rem 0 0; }
.example-note {
  background: var(--chip);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  margin: 0.6rem 0 0;
  color: var(--fg);
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--chip);
  padding: 0.05rem 0.3rem;
  border-radius: 4px;
}
.example-note code, .example-note strong { background: transparent; }
.errors:empty { display: none; }
.errors { margin-top: 0.8rem; color: var(--err); }
.errors p { margin: 0 0 0.3rem; font-weight: 600; }
.errors ul { margin: 0; padding-left: 1.2rem; }
.errors li { margin: 0.15rem 0; }
.summary { margin: 0 0 0.2rem; font-size: 0.92rem; color: var(--muted); }
.total { margin: 0.9rem 0 0; padding-top: 0.6rem; border-top: 1px solid var(--line); font-weight: 600; }
.empty { margin: 0 0 0.3rem; font-weight: 600; }
.day { margin-top: 0.9rem; }
.day h3 { margin: 0 0 0.3rem; }
ul.windows { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
ul.windows li {
  background: var(--chip);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-variant-numeric: tabular-nums;
}
ul.windows li strong { font-weight: 600; }
textarea.export {
  min-height: 10rem;
  font-size: 0.88rem;
  background: var(--chip);
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
}
#copy-status { margin: 0; }
#group-name { min-width: 12rem; }
.group-list { margin-top: 0.8rem; display: flex; flex-direction: column; gap: 0.4rem; }
.group-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  background: var(--chip);
}
.group-name {
  font-weight: 600;
  overflow-wrap: anywhere;
}
.group-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-right: auto;
}
.group-row button { padding: 0.35rem 0.7rem; font-size: 0.92rem; }
.about p { margin: 0 0 0.6rem; }
footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}
a { color: var(--accent); }
.hidden { display: none; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}