:root {
  --bg: #f5f4f0;
  --card: #ffffff;
  --ink: #1c2230;
  --sub: #6b7180;
  --line: #e4e1d9;
  --soft: #eeece6;
  --accent: #1f3a68;
  --accent-ink: #ffffff;
  --accent-soft: #e6ecf6;
  --warn: #a35a00;
  --warn-soft: #fbf0e1;
  --danger: #b42318;
  --ok: #1a7a49;
  --ok-soft: #e4f3ea;
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171d;
    --card: #1d2129;
    --ink: #e8eaee;
    --sub: #9aa1ad;
    --line: #2d323c;
    --soft: #252a33;
    --accent: #8fb0e8;
    --accent-ink: #10213d;
    --accent-soft: #24324a;
    --warn: #f0b45c;
    --warn-soft: #3a2e1c;
    --danger: #f08b80;
    --ok: #7fd1a3;
    --ok-soft: #1d3428;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14171d; --card: #1d2129; --ink: #e8eaee; --sub: #9aa1ad; --line: #2d323c; --soft: #252a33;
  --accent: #8fb0e8; --accent-ink: #10213d; --accent-soft: #24324a; --warn: #f0b45c; --warn-soft: #3a2e1c;
  --danger: #f08b80; --ok: #7fd1a3; --ok-soft: #1d3428; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  padding-bottom: calc(76px + env(safe-area-inset-bottom));
}
button, input, textarea { font: inherit; color: inherit; }
h1 { font-size: 18px; margin: 0; letter-spacing: .04em; }
h2 { font-size: 16px; margin: 0 0 10px; }
.sub { color: var(--sub); font-size: 13px; }
[hidden] { display: none !important; }

/* 上の帯と切り替え */
.top { position: sticky; top: 0; z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line); }
.top-in { max-width: 760px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.today { color: var(--sub); font-size: 14px; }
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 6; display: flex;
  background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
}
.tabs button {
  flex: 1; border: 0; background: none; padding: 14px 4px 16px; font-size: 15px; color: var(--sub);
  position: relative; cursor: pointer; border-top: 3px solid transparent;
}
.tabs button.on { color: var(--accent); font-weight: 700; border-top-color: var(--accent); }
.badge {
  display: inline-block; min-width: 20px; padding: 0 6px; margin-left: 6px; border-radius: 10px;
  background: var(--soft); color: var(--ink); font-size: 12px; line-height: 20px; font-weight: 700; vertical-align: 1px;
}
.badge.alert { background: var(--danger); color: #fff; }
@media (min-width: 768px) {
  body { padding-bottom: 32px; }
  .tabs { position: static; max-width: 760px; margin: 0 auto; border: 0; background: none; padding: 0 8px; }
  .tabs button { flex: 0 0 auto; padding: 8px 18px 10px; border-top: 0; border-bottom: 3px solid transparent; }
  .tabs button.on { border-bottom-color: var(--accent); }
}

main { max-width: 760px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 14px; }
.sec { margin: 22px 2px 10px; display: flex; align-items: center; gap: 8px; }

/* 入力と押すもの */
input[type="text"], input[type="password"], input[type="search"], input[type="date"], textarea {
  width: 100%; border: 1px solid var(--line); background: var(--card); border-radius: 10px; padding: 10px 12px; min-height: 44px;
}
textarea { resize: vertical; line-height: 1.6; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
button { cursor: pointer; }
.primary, .ghost, .chip {
  border-radius: 10px; min-height: 44px; padding: 0 16px; border: 1px solid transparent; font-weight: 600; white-space: nowrap;
}
.primary { background: var(--accent); color: var(--accent-ink); }
.primary:disabled { opacity: .5; cursor: default; }
.ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.ghost.danger { color: var(--danger); }
.ok-btn { background: var(--ok); color: #fff; }
.add { display: flex; gap: 8px; margin-bottom: 14px; }
.add input[type="text"], .add input[type="search"] { flex: 1; min-width: 0; }
.add input[type="date"] { width: 150px; flex: 0 0 auto; }
@media (max-width: 480px) {
  #task-add { flex-wrap: wrap; }
  #task-add input[type="text"] { flex: 1 1 100%; }
  #task-add input[type="date"] { flex: 1; width: auto; }
}
.row-end { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 10px; }
.msg { color: var(--sub); font-size: 13px; margin: 0; flex: 1; }
.msg.err { color: var(--danger); }

/* タスク */
.group-h { font-size: 13px; color: var(--sub); margin: 18px 4px 6px; font-weight: 700; letter-spacing: .04em; }
.group-h.late { color: var(--danger); }
.tasks { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.task { border-top: 1px solid var(--line); }
.task:first-child { border-top: 0; }
.task-row { display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px; }
.check {
  flex: 0 0 auto; width: 26px; height: 26px; margin-top: 1px; border-radius: 50%; border: 2px solid var(--sub);
  background: none; padding: 0; display: grid; place-items: center;
}
.check.on { background: var(--ok); border-color: var(--ok); }
.check.on::after { content: ""; width: 10px; height: 6px; border: solid #fff; border-width: 0 0 2px 2px; transform: rotate(-45deg) translate(1px, -1px); }
.task-main { flex: 1; min-width: 0; background: none; border: 0; padding: 0; text-align: left; }
.task-title { display: block; overflow-wrap: anywhere; }
.task.done .task-title { color: var(--sub); text-decoration: line-through; }
.task-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; font-size: 13px; color: var(--sub); margin-top: 2px; }
.task-meta .late { color: var(--danger); font-weight: 700; }
.task-meta .star { color: var(--warn); font-weight: 700; }
.task-meta .memo-line { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.editor { padding: 0 14px 14px 52px; display: grid; gap: 10px; }
.editor .line { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.editor .line input[type="date"] { width: 170px; }
@media (max-width: 480px) { .editor { padding-left: 14px; } .editor .line input[type="date"] { width: auto; flex: 1; } }
.editor textarea { min-height: 120px; }
.toggle { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 10px; background: none; }
.toggle.on { border-color: var(--warn); color: var(--warn); background: var(--warn-soft); font-weight: 700; }
.empty { color: var(--sub); text-align: center; padding: 28px 12px; }
.done-wrap { margin-top: 18px; }
.done-wrap summary { cursor: pointer; color: var(--sub); font-size: 14px; padding: 8px 4px; }

/* メモ */
.memo-card { display: block; width: 100%; text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; }
.memo-card strong { display: block; overflow-wrap: anywhere; }
.memo-card .pv { color: var(--sub); font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; }
.memo-card .when { color: var(--sub); font-size: 12px; margin-top: 4px; }
.edit-bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.memo-title { font-weight: 700; margin-bottom: 10px; }
.memo-body { min-height: calc(100vh - 290px); }

/* AI社員 */
.ins { border-top: 1px solid var(--line); padding: 12px 0 2px; margin-top: 12px; }
.ins-text { overflow-wrap: anywhere; white-space: pre-wrap; }
.ins-meta { display: flex; gap: 8px; align-items: center; font-size: 12px; color: var(--sub); margin-top: 4px; flex-wrap: wrap; }
.reply { margin-top: 8px; padding: 10px 12px; border-radius: 10px; background: var(--accent-soft); white-space: pre-wrap; overflow-wrap: anywhere; font-size: 15px; }
.reply b { display: block; font-size: 12px; color: var(--sub); margin-bottom: 2px; }
.st { display: inline-block; padding: 1px 8px; border-radius: 9px; font-size: 12px; font-weight: 700; background: var(--soft); color: var(--sub); }
.st.wait { background: var(--warn-soft); color: var(--warn); }
.st.ok { background: var(--ok-soft); color: var(--ok); }
.st.ng { background: var(--danger); color: #fff; }
.ap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; }
.ap-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 12px; color: var(--sub); }
.kind { padding: 1px 8px; border-radius: 9px; background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.kind.k-approval { background: var(--warn-soft); color: var(--warn); }
.ap-title { font-weight: 700; margin: 6px 0 4px; overflow-wrap: anywhere; }
.ap-sum { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 14px; color: var(--ink); max-height: 7.2em; overflow: hidden; position: relative; }
.ap-sum.open { max-height: none; }
.more { background: none; border: 0; color: var(--accent); padding: 4px 0; font-size: 14px; min-height: 32px; }
.chief { font-size: 13px; color: var(--sub); margin-top: 6px; overflow-wrap: anywhere; }
.mail { margin-top: 10px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; font-size: 14px; }
.mail dl { margin: 0; display: grid; grid-template-columns: 4.5em 1fr; }
.mail dt, .mail dd { margin: 0; padding: 6px 10px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.mail dt { color: var(--sub); background: var(--soft); }
.mail pre { margin: 0; padding: 10px; white-space: pre-wrap; font: inherit; max-height: 14em; overflow: auto; overflow-wrap: anywhere; }
.acts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.acts .primary, .acts .ghost { flex: 1 1 auto; }
.revise { margin-top: 10px; display: grid; gap: 8px; }
.ap .note { margin-top: 10px; font-size: 14px; }
.foot { color: var(--sub); font-size: 13px; text-align: center; margin: 20px 0 8px; }
.foot.warn { color: var(--danger); font-weight: 700; }
.login { max-width: 420px; margin: 40px auto; }
.login form { display: flex; gap: 8px; margin-top: 12px; }

.toast {
  position: fixed; left: 50%; bottom: calc(90px + env(safe-area-inset-bottom)); transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; opacity: 0;
  transition: opacity .2s, transform .2s; pointer-events: none; max-width: calc(100% - 32px); z-index: 10;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (min-width: 768px) { .toast { bottom: 32px; } }