:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #1c2430;
  --muted: #6b7686;
  --primary: #3b6ef5;
  --primary-ink: #ffffff;
  --danger: #e2445c;
  --ok: #24a367;
  --shadow: 0 1px 3px rgba(20, 30, 50, 0.08), 0 4px 16px rgba(20, 30, 50, 0.06);
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b1f27;
    --surface-2: #232833;
    --border: #2e343f;
    --text: #e7ebf1;
    --muted: #99a3b2;
    --primary: #5c86ff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.spacer { flex: 1; }

/* Buttons */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.btn-primary:hover { filter: brightness(1.05); background: var(--primary); }
.btn-block { display: block; width: 100%; }
.btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.icon-btn {
  border: none; background: transparent; color: var(--muted);
  font-size: 18px; cursor: pointer; padding: 4px 8px; border-radius: 6px; line-height: 1;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

input[type=text], input[type=email], select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--surface); color: var(--text); font-size: 14px;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

/* Login */
.login { position: fixed; inset: 0; display: grid; place-items: center; padding: 20px; }
.login-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 34px 30px; width: 100%; max-width: 360px; text-align: center;
}
.login-logo { font-size: 42px; }
.login-card h1 { margin: 8px 0 2px; font-size: 22px; }
.login-card p { margin: 0 0 20px; }
.dev-form { margin-top: 18px; display: grid; gap: 10px; }
.divider { position: relative; text-align: center; margin: 8px 0 4px; color: var(--muted); font-size: 12px; }
.divider::before { content: ""; position: absolute; top: 50%; left: 0; right: 0; height: 1px; background: var(--border); }
.divider span { position: relative; background: var(--surface); padding: 0 10px; }

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 10px; height: 54px; padding: 0 14px;
  background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; }
#menu-toggle { display: none; }
.user-box { display: flex; align-items: center; gap: 8px; }
.user-box img { width: 30px; height: 30px; border-radius: 50%; }
.avatar-fallback {
  width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-size: 13px; font-weight: 600;
}

/* Layout */
.body { display: flex; height: calc(100vh - 54px); }
.sidebar {
  width: 260px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border);
  overflow-y: auto; padding: 12px;
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted);
  padding: 4px 6px 8px;
}
.space-block { margin-bottom: 6px; }
.space-row {
  display: flex; align-items: center; gap: 4px; padding: 7px 8px; border-radius: 8px;
  cursor: pointer; font-weight: 600;
}
.space-row:hover { background: var(--surface-2); }
.space-row .caret { width: 14px; color: var(--muted); transition: transform 0.15s; }
.space-row.collapsed .caret { transform: rotate(-90deg); }
.space-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.space-tools { display: flex; gap: 2px; opacity: 0; transition: opacity 0.12s; }
.space-row:hover .space-tools { opacity: 1; }
.cat-list { list-style: none; margin: 2px 0 4px; padding: 0 0 0 6px; }
.cat-item {
  display: flex; align-items: center; gap: 6px; padding: 6px 8px 6px 18px; border-radius: 7px;
  cursor: pointer; color: var(--text); font-size: 14px;
}
.cat-item:hover { background: var(--surface-2); }
.cat-item.active { background: color-mix(in srgb, var(--primary) 16%, transparent); color: var(--primary); font-weight: 600; }
.cat-item .cat-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-item .cat-del { opacity: 0; }
.cat-item:hover .cat-del { opacity: 1; }
.cat-tools { display: inline-flex; gap: 1px; opacity: 0; transition: opacity 0.12s; }
.cat-item:hover .cat-tools { opacity: 1; }
.cat-tools .icon-btn { font-size: 14px; padding: 2px 5px; }
.add-cat { font-size: 13px; color: var(--muted); padding: 6px 8px 6px 18px; cursor: pointer; border-radius: 7px; }
.add-cat:hover { background: var(--surface-2); color: var(--text); }

/* Main */
.main { flex: 1; overflow-y: auto; padding: 22px 26px; }
.empty { display: grid; place-items: center; height: 100%; color: var(--muted); }
.task-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.task-head h2 { margin: 0; font-size: 20px; }
.cat-actions { margin-left: auto; display: flex; gap: 8px; }
.add-task { display: flex; gap: 8px; margin-bottom: 16px; max-width: 720px; }
.add-task input { flex: 1; }

.task-list { list-style: none; margin: 0; padding: 0; max-width: 720px; display: grid; gap: 8px; }
.task {
  display: flex; align-items: flex-start; gap: 10px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 11px 13px; box-shadow: var(--shadow);
}
.task.done { opacity: 0.6; }
.task.done .task-title { text-decoration: line-through; }
.check {
  width: 20px; height: 20px; border-radius: 6px; border: 2px solid var(--border);
  cursor: pointer; flex-shrink: 0; margin-top: 1px; display: grid; place-items: center; color: transparent;
  background: var(--surface); font-size: 13px;
}
.check.on { background: var(--ok); border-color: var(--ok); color: #fff; }
.task-main { flex: 1; min-width: 0; }
.task-title { cursor: text; word-break: break-word; }
.task-notes { color: var(--muted); font-size: 13px; margin-top: 2px; white-space: pre-wrap; }
.task-meta { display: flex; align-items: center; gap: 8px; margin-top: 7px; flex-wrap: wrap; }
.badge {
  font-size: 12px; padding: 2px 8px; border-radius: 20px; background: var(--surface-2); color: var(--muted);
  display: inline-flex; align-items: center; gap: 5px;
}
.badge img { width: 16px; height: 16px; border-radius: 50%; }
.badge.status-in_progress { background: color-mix(in srgb, var(--primary) 18%, transparent); color: var(--primary); }
.badge.status-done { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.mini-btn { font-size: 12px; padding: 2px 9px; border-radius: 20px; border: 1px solid var(--border); background: transparent; color: var(--text); cursor: pointer; }
.mini-btn:hover { background: var(--surface-2); }
.mini-btn.claim { border-color: var(--primary); color: var(--primary); }
.task-tools { display: flex; gap: 4px; align-items: center; }
.task select { width: auto; padding: 3px 6px; font-size: 12px; border-radius: 20px; }

/* Modal */
.modal-backdrop { position: fixed; inset: 0; background: rgba(10, 15, 25, 0.5); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow);
  width: 100%; max-width: 460px; max-height: 85vh; overflow-y: auto; padding: 20px;
}
.modal h3 { margin: 0 0 4px; }
.modal-row { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.grant-list { list-style: none; margin: 12px 0; padding: 0; display: grid; gap: 6px; }
.grant-item { display: flex; align-items: center; gap: 8px; padding: 8px 10px; background: var(--surface-2); border-radius: 8px; font-size: 13px; }
.grant-item .grant-scope { color: var(--muted); font-size: 12px; }

/* Calendar link in sidebar */
.calendar-link {
  padding: 9px 10px; border-radius: 8px; cursor: pointer; font-weight: 600; margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.calendar-link:hover { background: var(--surface-2); }
.calendar-link.active { background: color-mix(in srgb, var(--primary) 16%, transparent); color: var(--primary); }

/* Assignee chips */
.chips { display: inline-flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.chip-x {
  border: none; background: transparent; color: var(--muted); cursor: pointer;
  font-size: 11px; padding: 0 0 0 4px; line-height: 1;
}
.chip-x:hover { color: var(--danger); }
.badge.do { background: color-mix(in srgb, var(--primary) 14%, transparent); color: var(--primary); }
.badge.due { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }

/* Task detail modal */
.modal-lg { max-width: 640px; }
.modal-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.modal-head h3 { margin: 0; }
.detail { display: grid; gap: 14px; }
.detail-title { font-size: 17px; font-weight: 600; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.detail-grid label, .detail-block { display: grid; gap: 4px; font-size: 12px; color: var(--muted); font-weight: 600; }
.detail-block { gap: 8px; }
.detail-notes { width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit; resize: vertical; }
.block-head { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text); }
.assignee-box { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.detail-foot { font-size: 12px; margin-top: 14px; border-top: 1px solid var(--border); padding-top: 10px; }

/* Tracker table */
.tracker-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table.tracker { border-collapse: collapse; width: 100%; font-size: 13px; }
table.tracker th, table.tracker td { border: 1px solid var(--border); padding: 0; text-align: left; }
table.tracker th { background: var(--surface-2); padding: 6px 8px; font-weight: 600; white-space: nowrap; }
table.tracker th span { margin-right: 4px; }
table.tracker input.cell { border: none; background: transparent; padding: 6px 8px; border-radius: 0; }
table.tracker input.cell:focus { outline: 2px solid var(--primary); outline-offset: -2px; }
.row-tools, .row-tools-h { width: 28px; text-align: center; }

/* Comments */
.comments { display: grid; gap: 10px; }
.comment { display: flex; gap: 8px; align-items: flex-start; }
.avatar-fallback.sm, .comment img.sm { width: 24px; height: 24px; font-size: 11px; }
.comment img.sm { border-radius: 50%; }
.comment-body { flex: 1; min-width: 0; background: var(--surface-2); border-radius: 8px; padding: 7px 10px; }
.comment-meta { font-size: 12px; margin-bottom: 2px; }
.comment-form { display: flex; gap: 8px; align-items: flex-end; }
.comment-input { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit; resize: vertical; }

/* Calendar view */
.cal-tabs { display: flex; gap: 4px; }
.tab { border: 1px solid var(--border); background: var(--surface); color: var(--muted); padding: 6px 14px;
  border-radius: 8px; cursor: pointer; font-size: 13px; }
.tab.active { background: var(--primary); color: #fff; border-color: transparent; }
.agenda { display: grid; gap: 18px; max-width: 720px; }
.agenda-group h3 { margin: 0 0 8px; font-size: 14px; }
.agenda-row { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.agenda-date { font-size: 12px; color: var(--muted); width: 52px; flex-shrink: 0; }
.cal-task { display: flex; align-items: center; gap: 8px; flex: 1; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; cursor: pointer; box-shadow: var(--shadow); }
.cal-task:hover { border-color: var(--primary); }
.cal-task.done { opacity: 0.55; text-decoration: line-through; }
.cal-task-title { flex: 1; }
.cal-task-cat { font-size: 12px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex-shrink: 0; }
.dot.status-in_progress { background: var(--primary); }
.dot.status-done { background: var(--ok); }

.month-nav { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.month-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.month-dow { font-size: 12px; color: var(--muted); text-align: center; padding: 4px 0; font-weight: 600; }
.month-cell { min-height: 92px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 4px; display: flex; flex-direction: column; gap: 3px; }
.month-cell.empty { background: transparent; border: none; }
.month-cell.today { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.month-num { font-size: 12px; color: var(--muted); }
.month-task { font-size: 11px; padding: 2px 5px; border-radius: 5px; background: var(--surface-2);
  cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  border-left: 3px solid var(--muted); }
.month-task.status-in_progress { border-left-color: var(--primary); }
.month-task.status-done { border-left-color: var(--ok); opacity: 0.6; text-decoration: line-through; }
.month-task:hover { background: color-mix(in srgb, var(--primary) 14%, transparent); }
.cal-filter { width: auto; padding: 6px 10px; font-size: 13px; }

/* Pending / age badge next to task name */
.task-titlerow { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.task-titlerow .task-title { cursor: pointer; }
.pending { font-size: 11px; color: var(--muted); background: var(--surface-2); padding: 1px 7px;
  border-radius: 20px; white-space: nowrap; }
.pending.old { color: var(--danger); background: color-mix(in srgb, var(--danger) 14%, transparent); }
.pending.pdone { color: var(--ok); background: color-mix(in srgb, var(--ok) 16%, transparent); }
.new-badge { font-size: 11px; padding: 1px 7px; border-radius: 20px; font-weight: 600; white-space: nowrap;
  background: color-mix(in srgb, var(--primary) 18%, transparent); color: var(--primary); }

/* Tracker row status + saved flash */
.row-status { width: auto; padding: 3px 6px; font-size: 12px; border-radius: 6px; }
.status-row-contacted { color: var(--primary); }
.status-row-replied { color: #b5820a; }
.status-row-done { color: var(--ok); }
tr.row-done { opacity: 0.62; }
tr.row-done .cell { text-decoration: line-through; }
.row-tools { white-space: nowrap; }
.saved-tag { font-size: 11px; color: var(--ok); opacity: 0; transition: opacity 0.2s; margin-right: 4px; }
.saved-tag.show { opacity: 1; }

/* Mobile */
@media (max-width: 720px) {
  .detail-grid { grid-template-columns: 1fr; }
  .month-cell { min-height: 64px; }
  #menu-toggle { display: block; }
  .sidebar {
    position: fixed; top: 54px; bottom: 0; left: 0; z-index: 20; width: 82%; max-width: 300px;
    transform: translateX(-100%); transition: transform 0.2s; box-shadow: var(--shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .main { padding: 16px; }
}