:root {
  --bg: #f6f7f9; --panel: #ffffff; --text: #1d2330; --muted: #6b7280; --border: #e3e6eb;
  --accent: #2f6fed; --accent-text: #ffffff; --danger: #d14343; --warn: #c27c0e; --ok: #1f8a4c;
  --high: #d14343; --med: #c27c0e; --low: #6b7280; --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c; --panel: #1c2027; --text: #e6e8ec; --muted: #9aa1ad; --border: #2c323c;
    --accent: #5b8dff; --danger: #f07070; --warn: #e0a640; --ok: #4cc47f;
    --high: #f07070; --med: #e0a640; --low: #9aa1ad;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; min-width: 0;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
button { cursor: pointer; border: 1px solid var(--border); background: var(--panel); border-radius: 8px; padding: 8px 12px; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.danger { color: var(--danger); }
button.link { border: none; background: none; padding: 4px 6px; color: var(--muted); }
.muted { color: var(--muted); }
.error { color: var(--danger); }

/* Login */
.login-body { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 340px; display: grid; gap: 12px; }
.login-card h1 { margin: 0; }
.login-card p { margin: 0; }

/* Layout */
header { display: flex; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--border); background: var(--panel); position: sticky; top: 0; z-index: 5; }
header h1 { font-size: 18px; margin: 0; flex: 1; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 20px; display: grid; grid-template-columns: 220px 1fr; gap: 20px; }
@media (max-width: 760px) { .wrap { grid-template-columns: 1fr; padding: 16px; } aside { order: 2; } }

aside { display: grid; gap: 16px; align-content: start; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.card h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 8px; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat b { display: block; font-size: 22px; }
.stat span { font-size: 12px; color: var(--muted); }
.stat.overdue b { color: var(--danger); }
.projects { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.projects li button { width: 100%; text-align: left; border: none; background: none; padding: 6px 8px; display: flex; justify-content: space-between; border-radius: 6px; }
.projects li button:hover, .projects li button.active { background: var(--bg); }
.projects li button.active { font-weight: 600; }

main { display: grid; gap: 14px; align-content: start; min-width: 0; }
.quick-add { display: grid; grid-template-columns: 1fr 150px 110px 150px auto; gap: 8px; }
@media (max-width: 760px) { .quick-add { grid-template-columns: 1fr 1fr; } .quick-add .title { grid-column: 1 / -1; } }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tabs button { border-radius: 999px; padding: 5px 12px; }
.tabs button.active { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.toolbar input[type=search] { flex: 1; min-width: 160px; }

.list { display: grid; gap: 8px; }
.task { background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--low); border-radius: var(--radius); padding: 10px 12px; display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; }
.task.p1 { border-left-color: var(--high); }
.task.p2 { border-left-color: var(--med); }
.task.done { opacity: .6; }
.task.done .t-title { text-decoration: line-through; }
.task input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--accent); }
.t-main { min-width: 0; cursor: pointer; }
.t-title { font-weight: 500; overflow-wrap: anywhere; }
.t-meta { display: flex; flex-wrap: wrap; gap: 6px 12px; font-size: 13px; color: var(--muted); margin-top: 2px; }
.t-meta .overdue { color: var(--danger); font-weight: 600; }
.t-meta .today { color: var(--warn); font-weight: 600; }
.pill { font-size: 12px; padding: 1px 8px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); }
.pill.doing { color: var(--accent); border-color: var(--accent); }
.pill.blocked { color: var(--danger); border-color: var(--danger); }
.task select { padding: 4px 6px; font-size: 13px; }
.empty { text-align: center; padding: 40px; color: var(--muted); }

/* View toggle */
.view-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.view-toggle button { border: none; border-radius: 0; padding: 5px 14px; }
.view-toggle button.active { background: var(--text); color: var(--bg); }
body.view-board .wrap { max-width: 1500px; }
body.view-board #tabs { display: none; }

/* Kanban board */
.board { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; align-items: start; }
@media (max-width: 1000px) {
  .board { grid-template-columns: repeat(4, minmax(250px, 1fr)); overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
  .k-col { scroll-snap-align: start; }
}
@media (max-width: 760px) { .board { grid-template-columns: repeat(4, 82vw); margin: 0 -16px; padding: 0 16px 8px; scroll-padding: 16px; } }
.k-col { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); display: flex; flex-direction: column; min-height: 120px; }
.k-col-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px; font-weight: 600; font-size: 14px; border-bottom: 1px solid var(--border); }
.k-col-head .count { font-weight: 400; color: var(--muted); font-size: 13px; }
.k-col[data-status=doing] .k-col-head { color: var(--accent); }
.k-col[data-status=blocked] .k-col-head { color: var(--danger); }
.k-col[data-status=done] .k-col-head { color: var(--ok); }
.k-col-body { padding: 8px; display: grid; gap: 8px; align-content: start; min-height: 80px; flex: 1; border-radius: 0 0 var(--radius) var(--radius); transition: background .15s; }
.k-col-body.over { background: var(--bg); }
.k-more { font-size: 12px; color: var(--muted); text-align: center; padding: 4px; }
.k-card { background: var(--bg); border: 1px solid var(--border); border-left: 4px solid var(--low); border-radius: 8px; padding: 8px 8px 8px 4px; display: grid; grid-template-columns: 22px 1fr; gap: 4px; }
.k-card.p1 { border-left-color: var(--high); }
.k-card.p2 { border-left-color: var(--med); }
.k-card.placeholder { opacity: .35; }
.k-card.ghost { position: fixed; z-index: 50; pointer-events: none; box-shadow: 0 10px 30px rgba(0,0,0,.25); transform: rotate(2deg); background: var(--panel); }
.k-handle { cursor: grab; touch-action: none; color: var(--muted); display: grid; place-items: center; font-size: 14px; user-select: none; border-radius: 4px; }
.k-handle:hover { background: var(--border); }
.k-body { min-width: 0; cursor: pointer; }
.k-title { font-size: 14px; font-weight: 500; overflow-wrap: anywhere; }
.k-col[data-status=done] .k-title { text-decoration: line-through; color: var(--muted); }
.k-meta { display: flex; flex-wrap: wrap; gap: 4px 8px; font-size: 12px; color: var(--muted); margin-top: 4px; }
.k-meta .overdue { color: var(--danger); font-weight: 600; }
.k-meta .today { color: var(--warn); font-weight: 600; }
body.dragging { user-select: none; cursor: grabbing; }

/* Dialog */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); color: var(--text); padding: 0; width: min(560px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0,0,0,.4); }
dialog form { padding: 20px; display: grid; gap: 12px; }
dialog h2 { margin: 0; font-size: 18px; }
dialog label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
dialog textarea { min-height: 140px; resize: vertical; }
.row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 500px) { .row { grid-template-columns: 1fr; } }
.actions { display: flex; gap: 8px; justify-content: flex-end; }
.actions .spacer { flex: 1; }
.timestamps { font-size: 12px; color: var(--muted); }