:root {
  --navy: #0e2a47;
  --blue: #2563eb;
  --bg: #f4f6fa;
  --card: #ffffff;
  --line: #dde3ec;
  --text: #1c2533;
  --muted: #6b7686;
  --red: #c62828;
  --orange: #c26a00;
  --efty: #2563eb;
  --trustlink: #0e2a47;
  --kojin: #5b8f6a;
  --gold: #d4b978;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}
header {
  background: var(--navy);
  color: #fff;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header h1 { font-size: 17px; margin: 0; font-weight: 600; }
header .date { font-size: 13px; opacity: 0.8; margin-left: 10px; }
header button { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); border-radius: 6px; padding: 4px 10px; font-size: 13px; cursor: pointer; }
main { max-width: 960px; margin: 0 auto; padding: 16px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
@media (min-width: 900px) {
  main { grid-template-columns: minmax(0, 1fr) 260px; align-items: start; }
  .side { position: sticky; top: 16px; }
}
section.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
section.card h2 { font-size: 15px; margin: 0 0 10px; color: var(--navy); display: flex; align-items: center; gap: 8px; }
section.card h2 .count { font-size: 12px; color: var(--muted); font-weight: normal; }
.today-card { border: 2px solid var(--blue); }

/* 追加フォーム */
form.add { display: grid; grid-template-columns: 1fr; gap: 8px; }
form.add .row { display: flex; gap: 8px; flex-wrap: wrap; }
input, select { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--text); }
input[type=text] { width: 100%; }
.btn { font: inherit; padding: 8px 14px; border-radius: 6px; border: none; background: var(--blue); color: #fff; cursor: pointer; font-weight: 600; }
.btn.sub { background: #fff; color: var(--text); border: 1px solid var(--line); font-weight: normal; }

/* 会社の切り替え */
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg label { padding: 7px 12px; cursor: pointer; font-size: 14px; border-right: 1px solid var(--line); }
.seg label:last-child { border-right: none; }
.seg input { display: none; }
.seg input:checked + span { font-weight: 700; }
.seg label:has(input:checked) { background: var(--c); color: #fff; }

/* タスクの行 */
ul.tasks { list-style: none; margin: 0; padding: 0; }
ul.tasks li { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-top: 1px solid var(--line); }
ul.tasks li:first-child { border-top: none; }
ul.tasks li .check { width: 22px; height: 22px; flex: none; cursor: pointer; accent-color: var(--blue); }
.tag { flex: none; font-size: 11px; color: #fff; border-radius: 4px; padding: 2px 6px; font-weight: 600; }
.tag.efty { background: var(--efty); }
.tag.trustlink { background: var(--trustlink); }
.tag.kojin { background: var(--kojin); }
.t-body { flex: 1; min-width: 0; }
.t-title { word-break: break-word; cursor: pointer; }
.t-due { font-size: 12px; color: var(--muted); }
.t-due.late { color: var(--red); font-weight: 700; }
.t-due.soon { color: var(--orange); font-weight: 700; }
.star { flex: none; background: none; border: none; font-size: 20px; cursor: pointer; color: #c7ced9; padding: 0 2px; line-height: 1; }
.star.on { color: var(--gold); }
.empty { color: var(--muted); font-size: 14px; padding: 6px 0; }
li.done .t-title { text-decoration: line-through; color: var(--muted); }

/* 絞り込み */
.filter { display: flex; gap: 6px; flex-wrap: wrap; }
.filter button { font: inherit; font-size: 13px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); background: #fff; cursor: pointer; }
.filter button.on { background: var(--navy); color: #fff; border-color: var(--navy); }

/* リンク */
.links a { display: block; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 8px; text-decoration: none; color: var(--text); background: #fff; }
.links a:hover { border-color: var(--blue); }
.links a small { display: block; color: var(--muted); font-size: 12px; }
.links .bar { display: inline-block; width: 6px; height: 14px; border-radius: 2px; margin-right: 6px; vertical-align: -2px; }

/* 編集 */
dialog { border: none; border-radius: 12px; padding: 20px; width: min(440px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(14, 42, 71, .45); }
dialog h3 { margin: 0 0 12px; font-size: 16px; color: var(--navy); }
dialog .field { margin-bottom: 12px; }
dialog .field > label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
dialog .actions { display: flex; justify-content: space-between; gap: 8px; margin-top: 16px; }
.del { background: none; border: none; color: var(--red); cursor: pointer; font: inherit; }

details summary { cursor: pointer; color: var(--navy); font-weight: 600; font-size: 15px; }
.msg { color: var(--red); font-size: 13px; margin: 0; }
.msg:empty { display: none; }
.warn { color: var(--orange); font-size: 13px; }

/* ログイン */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px 24px; width: min(360px, 100%); }
.login-box h1 { margin: 0 0 16px; font-size: 18px; color: var(--navy); }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box .btn { width: 100%; }