:root {
  --accent: #dc4c3e;
  --accent-soft: rgba(220, 76, 62, 0.12);
  --bg: #f7f7f7;
  --panel: #ffffff;
  --side: #fcfaf8;
  --hover: #f1efed;
  --text: #202020;
  --muted: #808080;
  --line: #e6e6e6;
  --today: #058527;
  --tomorrow: #ad6200;
  --week: #8d6cdb;
  --overdue: #d1453b;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1e1e1e;
    --panel: #282828;
    --side: #232323;
    --hover: #303030;
    --text: #ededed;
    --muted: #9a9a9a;
    --line: #383838;
    --today: #25b84c;
    --tomorrow: #e0912f;
    --week: #a58cf0;
    --overdue: #ff7066;
    --accent-soft: rgba(220, 76, 62, 0.22);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer { flex: 1; }
.ellipsis { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.visually-hidden { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
svg { width: 18px; height: 18px; flex: none; }

.btn {
  border: 1px solid var(--line); background: var(--panel); border-radius: 6px;
  padding: 6px 12px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { background: var(--hover); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:hover { filter: brightness(0.95); }
.btn.primary:disabled { opacity: 0.5; cursor: default; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--hover); }
.btn.danger { color: var(--overdue); }
.icon-btn {
  border: 0; background: transparent; width: 32px; height: 32px; border-radius: 6px;
  display: inline-grid; place-items: center; cursor: pointer; color: var(--muted);
}
.icon-btn:hover { background: var(--hover); color: var(--text); }
.link { border: 0; background: none; color: var(--accent); cursor: pointer; padding: 4px 0; }
select, input[type="date"], input[type="time"], input:not([type]), input[type="search"], textarea {
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; outline: none;
}
select:focus, input:focus, textarea:focus { border-color: var(--muted); }

/* ---------- Sign in ---------- */
.signin { min-height: 100%; display: grid; place-items: center; padding: 24px; }
.signin-card { max-width: 380px; text-align: center; background: var(--panel); padding: 32px; border-radius: 14px; box-shadow: var(--shadow); }
.signin-card h1 { margin: 12px 0 8px; }
.signin-card p { color: var(--muted); }
.signin-card .btn { margin-top: 12px; padding: 10px 18px; }

/* ---------- Layout ---------- */
#app { display: flex; height: 100%; }
#sidebar {
  width: 280px; flex: none; background: var(--side); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; padding: 12px 10px; overflow-y: auto;
}
.side-head { display: flex; align-items: center; gap: 10px; padding: 4px 6px 12px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: #1e88e5; color: #fff; display: grid; place-items: center; font-weight: 700; flex: none; }
.who { flex: 1; min-width: 0; }
.who #email { font-weight: 600; }
.add-task-side {
  display: flex; align-items: center; gap: 10px; border: 0; background: none; color: var(--accent);
  font-weight: 600; padding: 8px; border-radius: 6px; cursor: pointer; text-align: left;
}
.add-task-side:hover { background: var(--hover); }
.plus { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); display: grid; place-items: center; }
.plus::before { content: "+"; color: #fff; font-weight: 700; line-height: 1; }
#nav { display: flex; flex-direction: column; gap: 1px; margin-top: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 7px 8px; border-radius: 6px; cursor: pointer;
  border: 0; background: none; text-align: left; width: 100%;
}
.nav-item:hover { background: var(--hover); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); }
.nav-item .count { margin-left: auto; color: var(--muted); font-size: 12px; }
.nav-item .hash { width: 18px; text-align: center; font-weight: 700; }
.nav-section { display: flex; align-items: center; justify-content: space-between; padding: 14px 8px 4px; color: var(--muted); font-weight: 600; font-size: 12px; }
.nav-section .icon-btn { width: 24px; height: 24px; }
.side-foot { margin-top: auto; padding: 12px 8px 0; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }

#main { flex: 1; min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
#topbar { display: flex; align-items: center; gap: 10px; padding: 18px 32px 8px; }
.title-wrap { flex: 1; min-width: 0; }
#title { font-size: 22px; margin: 0; font-weight: 700; }
#bulkbar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0 24px 6px; padding: 8px 10px;
  border-radius: 10px; background: var(--accent-soft);
}
#bulk-count { font-weight: 600; }
#search-wrap { padding: 0 32px 8px; }
#search { width: 100%; max-width: 720px; padding: 9px 12px; border-radius: 8px; }
.list { flex: 1; overflow-y: auto; padding: 0 32px 120px; }
.list > * { max-width: 760px; }

/* ---------- Task rows ---------- */
.section-h {
  display: flex; align-items: center; gap: 8px; padding: 18px 4px 6px; font-weight: 700;
  border-bottom: 1px solid var(--line); margin-bottom: 4px;
}
.section-h .count { color: var(--muted); font-weight: 400; font-size: 12px; }
.section-h .right { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.section-h select { padding: 2px 6px; font-size: 12px; color: var(--accent); border-color: transparent; background: transparent; cursor: pointer; }
.section-h.overdue-h { color: var(--text); }
.task {
  display: flex; gap: 10px; align-items: flex-start; padding: 9px 6px; border-bottom: 1px solid var(--line);
  cursor: pointer; border-radius: 6px; user-select: none;
}
.task:hover { background: var(--hover); }
.task.selected { background: var(--accent-soft); }
.check {
  width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--pc, var(--muted)); background: var(--pcs, transparent);
  flex: none; margin-top: 1px; cursor: pointer; display: grid; place-items: center; padding: 0;
}
.check:hover::after, .check.done::after { content: ""; width: 9px; height: 5px; border: 2px solid var(--pc, var(--muted)); border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.check.done { background: var(--pc, var(--muted)); }
.check.done::after { border-color: #fff; }
.check.sel { border-color: var(--accent); }
.check.sel.on { background: var(--accent); }
.check.sel.on::after { content: ""; width: 9px; height: 5px; border: 2px solid #fff; border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.task-body { flex: 1; min-width: 0; }
.task-title { word-wrap: break-word; }
.task.done .task-title { text-decoration: line-through; color: var(--muted); }
.task-notes { color: var(--muted); font-size: 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 3px; font-size: 12px; color: var(--muted); }
.meta .due { display: inline-flex; align-items: center; gap: 4px; }
.meta svg { width: 13px; height: 13px; }
.due.today { color: var(--today); } .due.tomorrow { color: var(--tomorrow); } .due.week { color: var(--week); } .due.overdue { color: var(--overdue); }
.meta .proj { margin-left: auto; white-space: nowrap; }
.add-inline { display: flex; align-items: center; gap: 10px; padding: 9px 6px; color: var(--muted); cursor: pointer; border: 0; background: none; width: 100%; text-align: left; border-radius: 6px; }
.add-inline:hover { color: var(--accent); }
.add-inline .p { color: var(--accent); font-size: 18px; line-height: 1; width: 20px; text-align: center; }
.empty { text-align: center; padding: 80px 20px; color: var(--muted); }
.empty h2 { color: var(--text); font-size: 16px; margin: 12px 0 4px; }
.empty svg { width: 64px; height: 64px; color: var(--accent); opacity: 0.7; }

/* ---------- Detail panel ---------- */
#detail {
  width: 400px; flex: none; border-left: 1px solid var(--line); background: var(--panel);
  padding: 16px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px;
}
.detail-head { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.d-title { display: flex; gap: 10px; align-items: flex-start; }
.d-title textarea { flex: 1; font-size: 18px; font-weight: 600; border-color: transparent; resize: none; padding: 2px 4px; background: transparent; }
#detail textarea.d-notes { border-color: transparent; background: transparent; min-height: 80px; resize: vertical; }
#detail textarea:hover { border-color: var(--line); }
.d-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field { display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--muted); min-width: 0; }
.field > input, .field > select { color: var(--text); font-size: 14px; width: 100%; }
.field.wide { grid-column: 1 / -1; }
.d-foot { display: flex; align-items: center; gap: 8px; margin-top: 8px; border-top: 1px solid var(--line); padding-top: 12px; }

/* ---------- Dialogs ---------- */
dialog {
  border: 0; border-radius: 12px; padding: 0; background: var(--panel); color: var(--text);
  width: min(620px, calc(100vw - 32px)); box-shadow: var(--shadow); margin-top: 12vh;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.35); }
dialog form { display: flex; flex-direction: column; gap: 8px; padding: 14px 16px; }
#q-title { border: 0; font-size: 16px; font-weight: 600; padding: 4px 2px; background: transparent; }
#q-notes { border: 0; resize: none; padding: 2px; background: transparent; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; min-height: 0; }
.chip { font-size: 12px; padding: 2px 8px; border-radius: 12px; background: var(--hover); color: var(--text); }
.chip.date { color: var(--today); }
.q-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.q-foot { display: flex; align-items: center; gap: 8px; border-top: 1px solid var(--line); padding-top: 10px; margin-top: 4px; }
#project-form h2 { margin: 0 0 6px; font-size: 16px; }
.swatches { display: flex; flex-wrap: wrap; gap: 8px; padding: 6px 0; }
.swatch { width: 26px; height: 26px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; padding: 0; }
.swatch.on { border-color: var(--text); }

#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: #333; color: #fff;
  border-radius: 8px; padding: 10px 14px; display: flex; gap: 16px; align-items: center; box-shadow: var(--shadow); z-index: 20;
}
#toast .link { color: #ff8a7a; font-weight: 600; }

/* ---------- Narrow screens ---------- */
.only-narrow { display: none; }
@media (max-width: 1100px) {
  #detail { position: fixed; right: 0; top: 0; bottom: 0; z-index: 15; box-shadow: var(--shadow); width: min(420px, 100vw); }
}
@media (max-width: 760px) {
  .only-narrow { display: inline-grid; }
  #sidebar { position: fixed; z-index: 12; left: 0; top: 0; bottom: 0; transform: translateX(-100%); transition: transform 0.2s; }
  #sidebar.open { transform: none; box-shadow: var(--shadow); }
  #scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.35); z-index: 11; }
  #topbar { padding: 12px 16px 6px; }
  .list { padding: 0 12px 120px; }
  #search-wrap { padding: 0 16px 8px; }
  #bulkbar { margin: 0 12px 6px; }
  .q-row { grid-template-columns: 1fr 1fr; }
  .d-grid { grid-template-columns: 1fr; }
}

/* ---------- AI ---------- */
.spark { width: 22px; height: 22px; display: inline-grid; place-items: center; color: var(--accent); }
.spark::before { content: "✦"; font-size: 17px; line-height: 1; }
.ai-side { color: var(--text); font-weight: 500; }
.dlg-h { display: flex; align-items: center; gap: 6px; margin: 0 0 4px; font-size: 16px; }
dialog h3 { margin: 6px 0 0; font-size: 14px; }
#ai-text { width: 100%; resize: vertical; min-height: 160px; }
.err { color: var(--overdue); font-size: 12px; margin: 0; min-height: 0; }
.err:empty { display: none; }
#ai-list { max-height: 50vh; overflow-y: auto; margin-top: 6px; }
.ai-item { display: flex; gap: 10px; align-items: flex-start; padding: 8px 4px; border-bottom: 1px solid var(--line); cursor: pointer; }
.ai-item input { margin-top: 3px; accent-color: var(--accent); }
.ai-item .meta { color: var(--accent); }
.ai-item .notes { color: var(--muted); font-size: 12px; white-space: pre-wrap; margin-top: 2px; }
.tidy-row { display: flex; align-items: center; gap: 8px; margin-top: -6px; }

.seg { display: flex; gap: 16px; flex-wrap: wrap; padding: 4px 0; }
.seg label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.seg input { accent-color: var(--accent); }
.wif-vals { display: grid; gap: 4px; font-size: 12px; background: var(--hover); border-radius: 8px; padding: 8px 10px; }
.wif-vals div { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.wif-vals span { color: var(--muted); min-width: 92px; }
.wif-vals code { user-select: all; word-break: break-all; }
#settings-dlg form { max-height: 85vh; overflow-y: auto; }