:root {
  --bg: #faf9f7;
  --col-bg: #f3f1ed;
  --card-bg: #ffffff;
  --fg: #1d1d1f;
  --dim: #8a8a8e;
  --line: #e2dfd9;
  --accent: #1d6fe0;
  --accent-soft: rgba(29, 111, 224, 0.10);
  --done: #b6b3ad;
  --danger: #c0392b;
  --p0: #e74c3c;
  --p1: #f39c12;
  --p2: #7a8aa3;
  --soon-bg: #fef0d8;
  --soon-fg: #a06a08;
  --over-bg: #fde2de;
  --over-fg: #b3271a;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --col-bg: #1d1d22;
    --card-bg: #25252b;
    --fg: #ececec;
    --dim: #7a7a82;
    --line: #2f2f36;
    --accent: #6aa9ff;
    --accent-soft: rgba(106, 169, 255, 0.14);
    --done: #54545a;
    --p0: #ff6b5e;
    --p1: #ffb04d;
    --p2: #8fa0bf;
    --soon-bg: rgba(243, 156, 18, 0.18);
    --soon-fg: #ffc973;
    --over-bg: rgba(231, 76, 60, 0.22);
    --over-fg: #ff8b80;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  font-size: 15px; line-height: 1.45;
  min-height: 100vh;
  -webkit-text-size-adjust: 100%;
}

.screen { max-width: 480px; margin: 0 auto; padding: 24px 20px 80px; }
.hidden { display: none !important; }

#lock-form { margin-top: 18vh; display: flex; flex-direction: column; gap: 12px; }
#lock-form h1 { margin: 0; font-size: 28px; }
#lock-form p { margin: 0; color: var(--dim); }
#lock-form input {
  font-size: 17px; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card-bg); color: var(--fg);
}
#lock-form button {
  font-size: 16px; padding: 12px; border: 0;
  border-radius: var(--radius); background: var(--accent); color: white; cursor: pointer;
}
.error { color: var(--danger); min-height: 1em; margin: 0; }

#app { max-width: 1200px; margin: 0 auto; padding: 16px 20px 60px; }

.topbar {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 18px;
}
.topbar h1 { font-size: 20px; margin: 0; font-weight: 600; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

.view-toggle { display: flex; gap: 2px; background: var(--col-bg); padding: 2px; border-radius: 6px; }
.view-toggle button {
  background: transparent; border: 0; color: var(--dim);
  padding: 4px 12px; font-size: 13px;
  border-radius: 4px; cursor: pointer;
}
.view-toggle button:hover { color: var(--fg); }
.view-toggle button.active {
  background: var(--card-bg); color: var(--fg);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

#lock-btn {
  background: transparent; color: var(--dim);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 5px 10px; cursor: pointer; font-size: 12px;
}
#lock-btn:hover { color: var(--fg); }

.board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: start; }

.column {
  background: var(--col-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  min-height: 240px;
  transition: background 0.1s, outline-color 0.1s;
}
.column.drag-over {
  background: var(--accent-soft);
  outline: 2px dashed var(--accent);
  outline-offset: -3px;
}

.col-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 10px;
}
.col-head h2 {
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--fg); margin: 0;
}

.add-row { margin-bottom: 8px; }
.add-row input {
  width: 100%; font-size: 14px; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 6px;
  background: var(--card-bg); color: var(--fg);
}
.add-row input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.task-list { list-style: none; padding: 0; margin: 0; }

.task {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  margin-bottom: 5px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: 6px;
  cursor: grab;
  user-select: none;
}
.task:active { cursor: grabbing; }
.task.dragging { opacity: 0.4; }
.task.p0 { border-left-color: var(--p0); }
.task.p1 { border-left-color: var(--p1); }
.task.p2 { border-left-color: var(--p2); }

.task input[type="checkbox"] {
  flex: 0 0 16px; width: 16px; height: 16px;
  accent-color: var(--accent); cursor: pointer;
}

.task .title {
  flex: 1; min-width: 0;
  background: transparent; border: 0;
  font: inherit; font-size: 14px;
  color: var(--fg); padding: 2px 0;
  cursor: text;
}
.task .title:focus { outline: none; }
.task.done .title { color: var(--done); text-decoration: line-through; }

/* subtask card on board: parent label on top */
.task.subtask-card {
  flex-direction: column; align-items: stretch; gap: 4px;
  border-left-color: var(--dim);
  border-left-style: dashed;
}
.subtask-card-main { display: flex; align-items: center; gap: 8px; }
.parent-label {
  background: transparent; border: 0;
  color: var(--dim); font-size: 11px;
  padding: 0 0 0 0; text-align: left; cursor: pointer;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 100%;
}
.parent-label:hover { color: var(--accent); }

.badges { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.due-badge {
  font-size: 11px; padding: 1px 6px; border-radius: 3px;
  background: var(--line); color: var(--dim);
  white-space: nowrap;
}
.due-badge.soon { background: var(--soon-bg); color: var(--soon-fg); }
.due-badge.overdue { background: var(--over-bg); color: var(--over-fg); font-weight: 600; }
.desc-dot {
  width: 5px; height: 5px;
  background: var(--dim); border-radius: 50%;
  display: inline-block;
}
.task.done .desc-dot { background: var(--done); }
.subprog-badge {
  font-size: 11px; padding: 1px 5px;
  border-radius: 3px;
  background: var(--accent-soft); color: var(--accent);
  white-space: nowrap;
}
.subprog-badge.complete { background: var(--line); color: var(--dim); }

.actions {
  display: flex; gap: 2px; flex-shrink: 0;
  opacity: 0; transition: opacity 0.1s;
}
.task:hover .actions, .task:focus-within .actions { opacity: 1; }
.actions button {
  background: transparent; border: 0;
  color: var(--dim); cursor: pointer;
  font-size: 11px; padding: 3px 6px;
  border-radius: 4px; white-space: nowrap;
}
.actions button:hover { color: var(--fg); background: var(--line); }

.empty { padding: 8px 4px; text-align: center; }

.date-group { margin-bottom: 14px; }
.date-group h3 {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--dim);
  margin: 0 0 6px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
}

.ghost-btn {
  width: 100%; margin-top: 6px;
  background: transparent; color: var(--dim);
  border: 1px dashed var(--line); border-radius: 6px;
  padding: 6px; font-size: 12px; cursor: pointer;
}
.ghost-btn:hover { color: var(--fg); border-color: var(--dim); }

.dim { color: var(--dim); }
.small { font-size: 12px; }
#status.error-state { color: var(--danger); }

/* due view */
#due-view { max-width: 720px; margin: 0 auto; }
.due-group { margin-bottom: 22px; }
.due-group h2 {
  font-size: 13px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  margin: 0 0 8px;
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-block;
}
.due-group.due-overdue h2 { background: var(--over-bg); color: var(--over-fg); }
.due-group.due-today h2 { background: var(--soon-bg); color: var(--soon-fg); }
.due-group.due-week h2 { color: var(--fg); background: var(--col-bg); }
.due-group.due-later h2 { color: var(--dim); background: var(--col-bg); }

/* drawer */
.drawer-backdrop {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.28);
  z-index: 100;
  display: flex; justify-content: flex-end;
}
.drawer {
  background: var(--card-bg);
  width: 440px; max-width: 100%; height: 100%;
  display: flex; flex-direction: column;
  padding: 18px 20px;
  overflow-y: auto;
  border-left: 1px solid var(--line);
}
.drawer-head {
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 16px;
}
#drawer-title {
  flex: 1; font-size: 18px; font-weight: 500;
  background: transparent; border: 0;
  color: var(--fg); padding: 4px 0;
  border-bottom: 1px solid var(--line);
}
#drawer-title:focus { outline: none; border-color: var(--accent); }
#drawer-close {
  background: transparent; border: 0;
  color: var(--dim); font-size: 22px;
  cursor: pointer; padding: 0 6px; line-height: 1;
}
#drawer-close:hover { color: var(--fg); }

.drawer-row { margin-bottom: 14px; }
.drawer-row label {
  display: block; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--dim); margin-bottom: 4px;
}
#drawer-due {
  font: inherit; font-size: 14px;
  padding: 6px 8px;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
}

.prio-buttons { display: flex; gap: 6px; flex-wrap: wrap; }
.prio-buttons button {
  font: inherit; font-size: 13px;
  padding: 5px 12px;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
  cursor: pointer;
}
.prio-buttons button:hover { border-color: var(--dim); }
.prio-buttons button.active { background: var(--accent); color: white; border-color: var(--accent); }
.prio-buttons button[data-prio="0"].active { background: var(--p0); border-color: var(--p0); }
.prio-buttons button[data-prio="1"].active { background: var(--p1); border-color: var(--p1); }
.prio-buttons button[data-prio="2"].active { background: var(--p2); border-color: var(--p2); }

/* subtask list inside drawer */
.subtask-list { list-style: none; padding: 0; margin: 0 0 6px; }
.subtask-row {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 0;
  border-bottom: 1px dashed var(--line);
}
.subtask-row:last-child { border-bottom: 0; }
.subtask-row input[type="checkbox"] {
  flex: 0 0 14px; width: 14px; height: 14px;
  accent-color: var(--accent); cursor: pointer;
}
.subtask-row.done .subtask-title { color: var(--done); text-decoration: line-through; }
.subtask-title {
  flex: 1; min-width: 0;
  font: inherit; font-size: 14px;
  background: transparent; border: 0;
  color: var(--fg); padding: 2px 0;
}
.subtask-title:focus { outline: none; border-bottom: 1px solid var(--accent); }
.pin-select {
  font: inherit; font-size: 11px;
  padding: 2px 4px;
  background: var(--bg); color: var(--dim);
  border: 1px solid var(--line); border-radius: 4px;
  cursor: pointer;
}
.pin-select.pinned { color: var(--accent); border-color: var(--accent); }
.subtask-row .del-sub {
  background: transparent; border: 0;
  color: var(--dim); cursor: pointer;
  font-size: 12px; padding: 2px 4px; border-radius: 4px;
  opacity: 0; transition: opacity 0.1s;
}
.subtask-row:hover .del-sub { opacity: 1; }
.subtask-row .del-sub:hover { color: var(--danger); }

#add-subtask {
  width: 100%; font-size: 13px; padding: 6px 8px;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
}
#add-subtask:focus { outline: none; border-color: var(--accent); }

.drawer-desc-row { display: flex; flex-direction: column; }
#drawer-desc {
  min-height: 100px;
  font: inherit; font-size: 14px;
  padding: 10px 12px;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
  resize: vertical;
}
#drawer-desc:focus { outline: none; border-color: var(--accent); }

.drawer-foot {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: flex-end;
}
.danger-btn {
  background: transparent; color: var(--danger);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 6px 14px; font-size: 13px; cursor: pointer;
}
.danger-btn:hover { background: var(--danger); color: white; border-color: var(--danger); }

@media (max-width: 820px) {
  .board { grid-template-columns: 1fr; }
  .column[data-bucket="today"] { order: 1; }
  .column[data-bucket="backlog"] { order: 2; }
  .column[data-bucket="recent"] { order: 3; }
  .actions { opacity: 1; }
  .subtask-row .del-sub { opacity: 1; }
  .task { padding: 9px 10px; }
  .task .title { font-size: 15px; }

  .drawer-backdrop { align-items: flex-end; }
  .drawer {
    width: 100%; height: auto; max-height: 88vh;
    border-left: 0; border-top: 1px solid var(--line);
    border-radius: 14px 14px 0 0;
  }
}