:root {
  --label-w: 220px;
  --bg: #f4f6f9;
  --panel: #ffffff;
  --line: #e3e8ef;
  --text: #1f2937;
  --sub: #6b7280;
  --accent: #2563eb;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
button { font-family: inherit; }

/* ヘッダー */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 20px;
  background: #fff; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.topbar h1 { font-size: 17px; margin: 0; white-space: nowrap; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.nav-btn {
  border: none; background: none; padding: 8px 14px; border-radius: 8px;
  cursor: pointer; font-size: 14px; color: var(--sub);
}
.nav-btn.active { background: #e8effd; color: var(--accent); font-weight: 600; }
.primary {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 8px 16px; cursor: pointer; font-size: 14px;
}
.primary:hover { background: #1d4ed8; }
.danger {
  background: none; border: 1px solid var(--danger); color: var(--danger);
  border-radius: 8px; padding: 7px 14px; cursor: pointer;
}
main { padding: 16px 20px; max-width: 1400px; margin: 0 auto; }
.hint { color: var(--sub); font-size: 12px; line-height: 1.7; }
.empty { color: var(--sub); padding: 8px 12px; margin: 0; }
.err { background: #fde8e8; color: #b91c1c; padding: 8px 16px; }

/* カレンダー(ガント) */
.cal-toolbar { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.cal-toolbar h2 { font-size: 16px; margin: 0 8px; }
.cal-toolbar button {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 12px; cursor: pointer;
}
.chk-label { margin-left: auto; color: var(--sub); display: flex; align-items: center; gap: 5px; cursor: pointer; }
.gantt-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.g-row { display: grid; }
.g-label {
  padding: 7px 10px; border-right: 1px solid var(--line); border-top: 1px solid var(--line);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  cursor: pointer; position: sticky; left: 0; background: #fff; z-index: 3;
  font-size: 13px;
}
.g-label:hover { color: var(--accent); }
.g-corner { border-top: none; cursor: default; color: var(--sub); font-size: 12px; }
.g-corner:hover { color: var(--sub); }
.g-cell { border-top: 1px solid var(--line); border-right: 1px solid #f0f2f6; min-height: 36px; }
.g-cell.sat { background: #eef5ff; }
.g-cell.sun { background: #fdf0f0; }
.g-cell.today { background: #fff7dc; }
.g-head-row .g-cell {
  min-height: auto; border-top: none;
  display: flex; flex-direction: column; align-items: center; padding: 4px 0;
  font-size: 10px; color: var(--sub); line-height: 1.3;
}
.g-head-row .g-cell b { font-size: 12px; }
.g-head-row .g-cell.today b { color: #b45309; }
.g-head-row .g-cell.sun, .g-head-row .g-cell.sun b { color: #c2554f; }
.g-head-row .g-cell.sat, .g-head-row .g-cell.sat b { color: #3b6db4; }
.g-head-row .h-name {
  writing-mode: vertical-rl; text-orientation: upright; /* 数字・英字も縦書きで正立させる(横向き防止) */
  font-size: 9px; line-height: 1.1;
  color: #c2554f; margin-top: 3px; max-height: 60px; overflow: hidden;
}
.g-member-label {
  background: #f8fafc !important; font-weight: 600;
  display: flex; align-items: center; gap: 7px; cursor: default;
}
.g-member-label:hover { color: inherit; }
.g-member-label small { color: var(--sub); font-weight: normal; }
.g-member-cell { background: #f8fafc; border-top: 1px solid var(--line); }
i.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; }
.g-bar {
  margin: 6px 2px; height: 24px; border-radius: 6px;
  background: var(--bar-color, #4e79a7); color: #fff; font-size: 12px;
  display: flex; align-items: center; gap: 2px; padding: 0 8px;
  cursor: pointer; overflow: hidden; white-space: nowrap;
  z-index: 2; box-shadow: 0 1px 2px rgba(0, 0, 0, .18);
}
.g-bar span { overflow: hidden; text-overflow: ellipsis; }
.g-bar:hover { filter: brightness(1.1); }
.g-bar.done { background: #9aa3af; opacity: .55; text-decoration: line-through; }
.g-bar.overdue { outline: 2px solid var(--danger); outline-offset: -1px; }

/* タスク一覧 */
.member-sec {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 16px; margin-bottom: 14px;
}
.member-sec h2 { font-size: 15px; display: flex; align-items: center; gap: 8px; margin: 0 0 10px; }
.member-sec h2 small { color: var(--sub); font-weight: normal; font-size: 12px; }
.card {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  border: 1px solid var(--line); border-radius: 10px; margin-bottom: 6px;
  background: #fff; cursor: pointer;
}
.card:hover { border-color: #c3d0e8; box-shadow: 0 1px 4px rgba(0, 0, 0, .06); }
.card.done { opacity: .55; }
.card.done .card-name { text-decoration: line-through; }
.card-done { width: 16px; height: 16px; cursor: pointer; flex: none; }
.card-main { flex: 1; min-width: 0; }
.card-name { font-weight: 600; }
.card-desc { color: var(--sub); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-meta { display: flex; gap: 8px; align-items: center; flex: none; }
.badge { background: #eef1f6; border-radius: 999px; padding: 3px 10px; font-size: 12px; white-space: nowrap; }
.badge.red { background: #fde8e8; color: #b91c1c; font-weight: 600; }
.badge.orange { background: #fef2df; color: #b45309; font-weight: 600; }
.badge.gray { background: #ececec; color: var(--sub); }
.mini { font-size: 12px; color: var(--sub); }
details summary { cursor: pointer; color: var(--sub); font-size: 13px; margin: 8px 0 6px; }

/* 設定 */
.settings-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px; align-items: start;
}
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.panel h2 { font-size: 15px; margin: 0 0 12px; }
.panel > label { display: block; margin-bottom: 10px; font-size: 13px; color: var(--sub); }
.panel input:not([type=color]):not([type=checkbox]), .panel select {
  width: 100%; margin-top: 4px; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px;
}
#chatworkFields label { display: block; margin-bottom: 10px; font-size: 13px; color: var(--sub); }
.member-row { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; }
.member-row .m-name { flex: 1; min-width: 90px; margin-top: 0 !important; }
.member-row .m-cwid { width: 150px !important; flex: none; margin-top: 0 !important; font-size: 12px !important; }
.member-row input[type=color] { width: 34px; height: 34px; border: none; background: none; padding: 0; cursor: pointer; flex: none; }
.m-del, .rem-del, .file-del, .pend-del {
  border: none; background: none; color: var(--sub); cursor: pointer; font-size: 14px; flex: none;
}
.m-del:hover, .rem-del:hover, .file-del:hover, .pend-del:hover { color: var(--danger); }
.member-add { display: flex; gap: 8px; margin-top: 10px; }
.member-add input { flex: 1; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; margin-top: 0 !important; }
.panel .ch-add { display: flex; gap: 8px; margin-top: 10px; }
.panel .ch-add input { margin-top: 0; }
.panel .ch-add input[type=date] { width: 155px; flex: none; }
.panel .ch-add .primary { white-space: nowrap; flex: none; }
.ch-row { display: flex; gap: 10px; align-items: center; margin-bottom: 6px; }
.ch-row .ch-date { color: var(--sub); font-size: 13px; white-space: nowrap; }
.ch-row .ch-name { flex: 1; }
.ch-del { border: none; background: none; color: var(--sub); cursor: pointer; font-size: 14px; flex: none; }
.ch-del:hover { color: var(--danger); }
.btn-row { display: flex; gap: 8px; align-items: center; margin-top: 6px; flex-wrap: wrap; }
.btn-row button:not(.primary), #copyUrlBtn {
  background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 7px 14px; cursor: pointer;
}
#notifyStatus { font-size: 12px; }
code { background: #eef1f6; padding: 4px 10px; border-radius: 6px; font-size: 13px; }

/* モーダル */
dialog {
  border: none; border-radius: 14px; padding: 0;
  width: min(560px, 92vw); box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
}
dialog::backdrop { background: rgba(15, 23, 42, .45); }
#taskForm { padding: 20px 24px; max-height: 85vh; overflow-y: auto; }
#taskForm h2 { margin: 0 0 14px; font-size: 17px; }
#taskForm > label, #taskForm fieldset { display: block; margin-bottom: 12px; font-size: 13px; color: var(--sub); }
#taskForm input, #taskForm select, #taskForm textarea {
  width: 100%; margin-top: 4px; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px; font-family: inherit;
}
#taskForm input[type=checkbox] { width: auto; margin-top: 0; }
#taskForm .form-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-bottom: 12px; }
#taskForm .form-row label { font-size: 13px; color: var(--sub); }
#taskForm fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
#taskForm legend { padding: 0 6px; }
#taskForm .rem-row { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; color: var(--text); flex-wrap: wrap; }
#taskForm .due-time-row { margin-top: -4px; }
#taskForm .due-time-controls { display: inline-flex; align-items: center; gap: 2px; margin-left: 8px; }
#taskForm .due-time-controls select { width: 64px; margin-top: 0; }
#taskForm .rem-row .rem-days { width: 70px; margin-top: 0; }
#taskForm .rem-row .rem-hh, #taskForm .rem-row .rem-mm { width: 64px; margin-top: 0; }
#taskForm .rem-row .rem-colon { font-weight: 600; margin: 0 2px; }
#taskForm .rem-row .sent { color: #16a34a; font-size: 12px; }
#addRemBtn, #cancelBtn {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 14px; cursor: pointer; width: auto !important;
}
#taskForm .file-row { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; color: var(--text); }
#taskForm .file-row a { color: var(--accent); text-decoration: none; }
#taskForm .file-row a:hover { text-decoration: underline; }
#taskForm .file-row small { color: var(--sub); }
#taskForm input[type=file] { border: none; padding: 4px 0; }
.modal-footer { display: flex; gap: 8px; margin-top: 16px; align-items: center; }
.spacer { flex: 1; }