:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #eef0f3;
  --border: #dcdfe4;
  --text: #1d2330;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-text: #ffffff;
  --danger: #dc2626;
  --question: #f59e0b;
  --question-bg: #fff7e6;
  --radius: 8px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.06), 0 1px 3px rgb(0 0 0 / 0.08);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b2029;
    --surface-2: #232934;
    --border: #2f3744;
    --text: #e5e7eb;
    --muted: #9aa3b2;
    --primary: #3b82f6;
    --question-bg: #3a2e14;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

a { color: var(--primary); }
h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 20px 0 8px; color: var(--muted); }
code, .mono { font-family: var(--mono); font-size: 12.5px; }
.muted { color: var(--muted); }

/* ---------------------------------------------------------------- controls */

input, textarea, select {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
input[type="color"] { width: 44px; padding: 2px; height: 36px; }
textarea { resize: vertical; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-primary:hover { background: var(--primary); filter: brightness(1.08); }
.btn-danger { color: var(--danger); }
.btn-ghost { border-color: transparent; background: transparent; }

.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.grow { flex: 1 1 140px; }

.alert {
  margin: 0;
  padding: 8px 10px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

/* ---------------------------------------------------------------- layout */

.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar form { margin: 0; }
.topbar-spacer { flex: 1; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: 0.02em; }
.crumb { color: var(--muted); }
.crumb-current { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.live { color: var(--muted); font-size: 10px; }

.user-menu { position: relative; }
.user-menu summary { list-style: none; }
.user-menu summary::-webkit-details-marker { display: none; }
.menu {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  min-width: 200px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgb(0 0 0 / 0.18);
  display: flex;
  flex-direction: column;
  z-index: 20;
}
.menu form { margin: 0; }
.menu-item {
  display: block;
  width: 100%;
  padding: 9px 12px;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--text);
  font: inherit;
  text-align: left;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.menu-item:hover, .menu-item:focus-visible { background: var(--surface-2); }
.live.on { color: #16a34a; }

.center-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); }
.brand-lg { font-size: 28px; margin: 0; }

.page { max-width: 1040px; margin: 0 auto; padding: 24px 16px; display: grid; gap: 24px; }
.project-grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.project-card { display: flex; flex-direction: column; gap: 8px; padding: 16px; }
.project-card p { margin: 0; }
.project-link { display: flex; flex-direction: column; text-decoration: none; color: var(--text); }
.project-name { font-weight: 600; font-size: 16px; }
.project-stats { display: flex; gap: 10px; font-size: 12.5px; color: var(--muted); align-items: center; }
.danger-zone summary { cursor: pointer; color: var(--muted); font-size: 12px; }
.danger-zone form { margin-top: 8px; }
.new-project { max-width: 520px; }
.notice { margin: 0; padding: 8px 12px; border-radius: 8px; background: var(--surface-2); }
.member-list { margin: 8px 0; }
.settings-users td, .settings-users th { padding: 6px 8px; text-align: left; vertical-align: middle; }
.settings-users form { display: inline-flex; gap: 6px; }

/* ---------------------------------------------------------------- board */

.board-page { height: 100vh; height: 100dvh; display: flex; flex-direction: column; }
.column-tabs { display: none; }
.board {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(260px, 1fr));
  gap: 12px;
  padding: 12px 16px;
  overflow-x: auto;
  min-height: 0;
}
.column {
  display: flex;
  flex-direction: column;
  background: var(--surface-2);
  border-radius: var(--radius);
  min-height: 0;
}
.column-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px 6px; }
.column-header h2 { font-size: 13px; margin: 0; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.count { font-size: 12px; color: var(--muted); }
.card-list { list-style: none; margin: 0; padding: 4px 8px 12px; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; flex: 1; min-height: 60px; }

.task-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 10px;
  box-shadow: var(--shadow);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.task-card:hover { border-color: var(--primary); }
.task-card.has-question { border-left: 4px solid var(--question); background: var(--question-bg); }
.task-card-top { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.task-no { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.task-title { font-weight: 600; word-break: break-word; }
.task-doc { color: var(--muted); font-size: 11.5px; word-break: break-all; }
.task-badges { display: flex; flex-wrap: wrap; gap: 4px; }
.drag-ghost { opacity: 0.4; }

.chip {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--chip);
  background: color-mix(in srgb, var(--chip) 15%, transparent);
}
.badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 11px;
  background: var(--surface-2);
  color: var(--muted);
}
.badge-question { background: var(--question); color: #1f1300; font-weight: 600; }
.badge-approval { background: color-mix(in srgb, var(--question) 25%, transparent); color: var(--text); font-weight: 600; }
.approval-note { gap: 12px; padding: 8px 12px; margin: 12px 0; border-radius: 8px; background: color-mix(in srgb, var(--question) 15%, transparent); }
.approval-note span { flex: 1; }

/* ---------------------------------------------------------------- dialogs */

.dialog {
  width: min(520px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 20px 50px rgb(0 0 0 / 0.25);
  overflow-y: auto;
}
.dialog-wide { width: min(760px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgb(15 18 25 / 0.5); }
.dialog-close { position: sticky; top: 0; float: right; margin: -12px -12px 0 0; }

.detail-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.status { font-size: 11.5px; padding: 1px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); }
.status-in_progress { color: var(--primary); }
.status-waiting_input { background: var(--question); color: #1f1300; }
.status-done { color: #16a34a; }
.meta { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0 0 12px; font-size: 13px; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }
.description { white-space: pre-wrap; background: var(--surface-2); padding: 10px 12px; border-radius: 6px; margin-bottom: 12px; }
.detail-actions { margin-bottom: 8px; align-items: center; }
.move-select { flex-direction: row; align-items: center; gap: 6px; margin-left: auto; }
.move-select select { width: auto; }
.panel { margin: 8px 0; padding: 12px; border: 1px dashed var(--border); border-radius: 6px; }

.timeline { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.log { padding: 8px 10px; border-radius: 6px; background: var(--surface-2); border-left: 3px solid var(--border); }
.log-head { display: flex; gap: 8px; font-size: 12px; align-items: baseline; }
.log-type { font-weight: 600; }
.log-body { white-space: pre-wrap; word-break: break-word; margin-top: 2px; }
.log-commit-ref { margin-top: 4px; font-size: 12.5px; }
.log-commit-ref code { background: var(--surface); padding: 1px 5px; border-radius: 4px; }
.log-question { border-left-color: var(--question); background: var(--question-bg); }
.log-answer { border-left-color: #16a34a; }
.log-commit { border-left-color: var(--primary); }
.log-skill { border-left-color: #8b5cf6; }
.log-system { opacity: 0.8; font-size: 12.5px; }

.comment-form { margin-top: 12px; }
.comment-form.highlight textarea { border-color: var(--question); outline: 2px solid color-mix(in srgb, var(--question) 30%, transparent); }
.comment-form select { width: auto; }

.plain-list { list-style: none; padding: 0; margin: 0 0 12px; display: flex; flex-direction: column; gap: 4px; }
.plain-list .row { align-items: center; }

.issued { margin: 16px 0; padding: 12px; border-radius: 6px; background: var(--question-bg); }
.issued p { margin: 0 0 8px; }
.copy-row { display: flex; gap: 8px; align-items: center; margin: 6px 0; }
.copy-row code { flex: 1; padding: 6px 8px; background: var(--surface); border-radius: 4px; word-break: break-all; }
.token-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 13px; }
.token-table th, .token-table td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); }
.token-table th { color: var(--muted); font-weight: 500; font-size: 12px; }
.table-scroll { overflow-x: auto; }
.mcp-log-table th, .mcp-log-table td { white-space: nowrap; }
.mcp-log-table td.mcp-log-error { white-space: normal; color: var(--danger); min-width: 200px; }
.mcp-log-ok { color: #16a34a; }

/* ---------------------------------------------------------------- mobile (iPhone 等) */

@media (max-width: 720px) {
  /* iOS Safari は 16px 未満の入力欄にフォーカスすると画面を拡大するため */
  input, textarea, select { font-size: 16px; }

  .topbar { gap: 8px; padding: 8px 12px; padding-top: max(8px, env(safe-area-inset-top)); }
  .topbar .btn { padding: 6px 10px; }
  .crumb-current { min-width: 0; flex: 0 1 auto; }
  .topbar-spacer { flex: 1 1 0; min-width: 0; }
  .admin-label { display: none; }
  .user-name { max-width: 7em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; vertical-align: bottom; }

  /* ボードは1列ずつ横スワイプ (スナップ) で表示し、上部のタブで列を切り替える */
  .column-tabs {
    display: flex;
    gap: 4px;
    padding: 8px 12px 0;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .column-tab {
    flex: 1 0 auto;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    font: inherit;
    font-size: 12.5px;
    white-space: nowrap;
  }
  .column-tab.active { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
  .board {
    grid-template-columns: repeat(4, calc(100vw - 24px));
    gap: 12px;
    padding: 8px 12px max(12px, env(safe-area-inset-bottom));
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
  }
  .column { scroll-snap-align: center; }

  /* ダイアログは画面下からのシート表示 */
  .dialog, .dialog-wide {
    width: 100vw;
    max-width: 100vw;
    max-height: 92dvh;
    margin: auto 0 0;
    padding: 16px 16px max(16px, env(safe-area-inset-bottom));
    border-radius: 14px 14px 0 0;
  }
  .dialog-close { margin: -6px -6px 0 0; }
  .meta { grid-template-columns: max-content 1fr; gap: 4px 12px; }
  .move-select { margin-left: 0; }

  .token-table th, .token-table td, .settings-users th, .settings-users td { white-space: nowrap; }
  #token-form .grow { flex-basis: 100%; }
  .page { padding: 16px 12px; gap: 16px; }
  .card { padding: 16px; }
}