:root {
  --bg: #f4f5f7; --box: #fff; --text: #1d2330; --muted: #6b7280; --line: #e3e6eb;
  --accent: #2563eb; --up: #16a34a; --down: #dc2626;
  --gap: 16px; --hh: 44px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1218; --box: #181c25; --text: #e5e7eb; --muted: #8b93a1; --line: #262c38; --accent: #60a5fa; }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: 18px; } h2 { font-size: 15px; } h3 { font-size: 13px; color: var(--muted); margin: 12px 0 6px; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: var(--accent); color: #fff; border: 0; border-radius: 0; padding: 7px 12px; cursor: pointer; }
button.danger { background: var(--down); }
button.secondary { background: var(--bg); color: var(--text); border: 1px solid var(--line); }
.link-btn { background: none; color: var(--muted); padding: 2px 6px; display: inline-flex; align-items: center; gap: 4px; }
.link-btn:hover { color: var(--accent); }
.link-btn.accent { color: var(--accent); }
input, textarea, select { background: var(--bg); border: 1px solid var(--line); border-radius: 0; padding: 7px 9px; }
input[type=text], input[type=password], input[type=date], textarea { width: 100%; }
textarea { resize: vertical; }
.ic { display: inline-block; vertical-align: -2px; flex: none; }
[hidden] { display: none !important; }

.top { display: flex; justify-content: space-between; align-items: center; padding: 12px var(--gap); border-bottom: 1px solid var(--line); background: var(--box); }
.top nav { display: flex; gap: 14px; align-items: center; }

.box { background: var(--box); border: 1px solid var(--line); padding: 14px; }
.box-head { display: flex; align-items: center; gap: 6px; margin-bottom: 10px; }
.count { font-size: 12px; color: var(--muted); background: var(--bg); border: 1px solid var(--line); padding: 0 7px; }
.head-right { margin-left: auto; display: inline-flex; align-items: center; gap: 2px; }

/* Layout: agenda + projects left, to-do + groups right */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: var(--gap); padding: var(--gap); align-items: start; max-width: 1600px; margin: 0 auto; }
.main-col, .side-col { display: grid; gap: var(--gap); align-content: start; min-width: 0; }
/* Big screens: Agenda | Projects | To-do + groups */
@media (min-width: 1400px) {
  .layout { grid-template-columns: minmax(0, 1fr) minmax(300px, 380px) 340px; max-width: 2200px; }
  .main-col { display: contents; }
  .agenda { grid-column: 1; grid-row: 1; }
  .projects-box { grid-column: 2; grid-row: 1; }
  .side-col { grid-column: 3; grid-row: 1; }
  .pgrid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .layout { display: flex; flex-direction: column; align-items: stretch; padding: 12px; gap: 12px; }
  .main-col, .side-col { display: contents; }
  .todo { order: 1; } .agenda { order: 2; } .projects-box { order: 3; } .groups { order: 4; }
  .top { padding: 10px 12px; }
}

/* Foldable boxes */
.fold .fold-toggle { padding: 2px; }
.fold .fold-toggle .ic { transition: transform .15s; }
.fold.collapsed .fold-toggle .ic { transform: rotate(-90deg); }
.fold.collapsed .box-body { display: none; }
.fold.collapsed .box-head { margin-bottom: 0; }

/* Colour swatch with hidden native picker */
.swatch { position: relative; display: inline-block; flex: none; width: 18px; height: 18px; cursor: pointer; border: 1px solid rgba(0,0,0,.18); background: var(--accent); }
.swatch input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; padding: 0; border: 0; cursor: pointer; }
.swatch.big { width: 30px; height: 30px; }
.swatch.disabled { opacity: .55; cursor: default; }
.swatch.disabled input { cursor: default; }
.sq { width: 10px; height: 10px; flex: none; display: inline-block; }

.inline-add { display: flex; gap: 6px; align-items: center; margin-bottom: 12px; }
.inline-add input[type=text] { flex: 1; min-width: 0; }
.groups .inline-add { margin: 10px 0 0; }

/* Lists (to-do, groups, panes) */
.todo-add { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.todo-add input { flex: 1; min-width: 0; }
.todo-add select, .tag-select { width: 100%; color: var(--text); padding: 6px 8px; font-size: 13px; }
.tag-select { width: auto; max-width: 100%; font-size: 12px; padding: 2px 4px; }
.todo-list { list-style: none; margin: 0; padding: 0; }
.todo-list li { display: flex; align-items: center; gap: 8px; padding: 7px 2px; border-bottom: 1px solid var(--line); }
.todo-list li:last-child { border-bottom: 0; }
.todo-list .t { flex: 1; word-break: break-word; cursor: text; }
.todo-list .t[contenteditable="true"] { outline: 1px solid var(--accent); padding: 0 4px; }
.todo-list input[type=checkbox] { width: 17px; height: 17px; flex: none; cursor: pointer; margin: 0; }
.act { background: none; color: var(--muted); padding: 2px 5px; font-size: 13px; display: inline-flex; }
.act:hover { color: var(--accent); }
.todo-list .date { font-size: 11px; color: var(--muted); white-space: nowrap; }
.done .t { color: var(--muted); text-decoration: line-through; cursor: default; }
.bin { border-top: 1px solid var(--line); margin-top: 8px; max-height: 360px; overflow-y: auto; }
.todo-empty { color: var(--muted); padding: 6px 2px; font-size: 13px; }
.todo .box-head #doneToggle { margin-left: auto; }
.t-wrap { flex: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; min-width: 0; }
.tag { background: none; border: 1px solid var(--line); color: var(--muted); font-size: 11px; padding: 0 6px; cursor: pointer; }
.tag.empty { border-style: dashed; opacity: 0; }
.todo-list li:hover .tag.empty { opacity: 1; }
.tag.static { cursor: default; }
@media (hover: none) { .tag.empty { opacity: 1; } }

/* Agenda */
.ag-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; }
.ag-nav { display: flex; align-items: center; gap: 4px; flex: 1; min-width: 0; }
.ag-nav h2 { font-size: 16px; margin-left: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ag-nav h2::first-letter { text-transform: uppercase; }
.ag-nav .secondary { padding: 5px 10px; }
.seg { display: inline-flex; border: 1px solid var(--line); }
.seg button { background: var(--bg); color: var(--muted); padding: 5px 12px; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--accent); color: #fff; }
#agNew { display: inline-flex; align-items: center; gap: 4px; padding: 6px 12px; }
@media (max-width: 560px) {
  .ag-nav { flex-basis: 100%; }
  .seg { flex: 1; } .seg button { flex: 1; }
}

.ev-chip { display: block; width: 100%; text-align: left; font-size: 12px; line-height: 1.3; padding: 1px 5px; margin-top: 2px;
           white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ev-chip .tm { opacity: .85; font-variant-numeric: tabular-nums; }
.ev-chip:hover, .ev-block:hover { filter: brightness(1.08); }

/* Month */
.m-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.m-wd { background: var(--box); text-align: center; font-size: 11px; color: var(--muted); padding: 4px 0; text-transform: uppercase; letter-spacing: .04em; }
.m-day { background: var(--box); min-height: 104px; padding: 3px 4px 4px; cursor: pointer; min-width: 0; }
.m-day:hover { background: var(--bg); }
.m-day.we { background: color-mix(in srgb, var(--bg) 55%, var(--box)); }
.m-day.out { opacity: .45; }
.m-dn { background: none; color: var(--text); padding: 0 4px; font-size: 12px; min-width: 22px; height: 20px; }
.m-dn:hover { color: var(--accent); }
.m-day.today .m-dn { background: var(--accent); color: #fff; font-weight: 700; }
.m-more { display: block; background: none; color: var(--muted); font-size: 11px; padding: 1px 5px; margin-top: 1px; }
.m-more:hover { color: var(--accent); }
@media (max-width: 860px) {
  .m-day { min-height: 66px; padding: 2px; }
  .ev-chip { font-size: 10px; padding: 0 3px; }
  .ev-chip .tm { display: none; }
}

/* Week / day time grid */
.tg { border: 1px solid var(--line); }
.tg-head, .tg-allday, .tg-body { display: grid; }
.tg-head { border-bottom: 1px solid var(--line); }
.tg-dh { background: none; color: var(--muted); padding: 6px 2px; font-size: 12px; text-transform: capitalize; border-left: 1px solid var(--line); }
.tg-dh b { color: var(--text); font-size: 15px; margin-left: 2px; }
.tg-dh:not(.nolink):hover b { color: var(--accent); }
.tg-dh.nolink { cursor: default; }
.tg-dh.today b { color: #fff; background: var(--accent); padding: 0 5px; }
.tg-allday { border-bottom: 1px solid var(--line); min-height: 28px; }
.tg-lbl { font-size: 10px; color: var(--muted); padding: 6px 4px; text-align: right; }
.tg-ad { border-left: 1px solid var(--line); padding: 0 2px 2px; min-width: 0; cursor: pointer; }
.tg-ad:hover { background: var(--bg); }
.tg-scroll { max-height: 620px; overflow-y: auto; }
.tg-body { position: relative; }
.tg-hours { position: relative; }
.tg-hours span { position: absolute; right: 6px; font-size: 10px; color: var(--muted); transform: translateY(-50%); font-variant-numeric: tabular-nums; }
.tg-hours span:first-child { transform: none; }
.tg-col { position: relative; border-left: 1px solid var(--line); cursor: pointer; min-width: 0;
          background-image: repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px var(--hh)); }
.tg-col.today { background-color: color-mix(in srgb, var(--accent) 5%, transparent); }
.ev-block { position: absolute; text-align: left; font-size: 12px; line-height: 1.25; padding: 2px 5px; overflow: hidden; z-index: 1;
            box-shadow: 0 0 0 1px var(--box); display: block; }
.ev-block .tm { display: block; font-size: 11px; opacity: .85; font-variant-numeric: tabular-nums; }
.ev-block .tt { font-weight: 600; }
.ev-block.short { white-space: nowrap; text-overflow: ellipsis; }
.ev-block.short .tm { display: inline; }
.now { position: absolute; left: 0; right: 0; height: 2px; background: var(--down); z-index: 2; pointer-events: none; }
.now::before { content: ''; position: absolute; left: -4px; top: -3px; width: 8px; height: 8px; border-radius: 50%; background: var(--down); }
@media (max-width: 860px) {
  .tg-dh { font-size: 10px; } .tg-dh b { font-size: 13px; }
  .tg:not(.one) .ev-block { font-size: 10px; padding: 1px 2px; }
  .tg:not(.one) .ev-block .tm { display: none; }
}

/* Projects */
.pgrid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); align-items: start; }
.empty-hint { color: var(--muted); padding: 10px 0; grid-column: 1 / -1; }
.pcard { padding: 0; border-top: 3px solid var(--pc); display: flex; flex-direction: column; }
.pc-head { display: flex; align-items: center; gap: 8px; padding: 10px 10px 6px 8px; }
.pc-name { flex: 1; min-width: 0; cursor: text; word-break: break-word; }
.pc-name[contenteditable="true"] { outline: 1px solid var(--accent); padding: 0 4px; }
.handle { cursor: grab; color: var(--muted); display: inline-flex; touch-action: none; }
.handle:active { cursor: grabbing; }
.drag-ghost { opacity: .35; }
.pc-del { opacity: .6; }
.pcard:hover .pc-del { opacity: 1; }
.pc-tabs { display: flex; gap: 6px; padding: 4px 10px 10px; flex-wrap: wrap; }
.pc-tab { display: inline-flex; align-items: center; gap: 5px; background: var(--bg); color: var(--muted); border: 1px solid var(--line); padding: 4px 9px; font-size: 12px; }
.pc-tab b { color: var(--text); }
.pc-tab:hover { border-color: var(--pc); color: var(--text); }
.pc-tab.on { background: var(--pc); border-color: var(--pc); color: #fff; }
.pc-tab.on b { color: #fff; }
.pc-pane { display: none; border-top: 1px solid var(--line); background: var(--bg); padding: 4px 10px 10px; }
.pcard.open .pc-pane { display: block; }
.pc-pane .todo-list li { font-size: 13px; }
.pane-form { display: flex; gap: 6px; margin-top: 8px; align-items: flex-start; }
.pane-form input, .pane-form textarea { flex: 1; min-width: 0; background: var(--box); }
.pane-btn { margin-top: 8px; display: inline-flex; align-items: center; gap: 5px; background: var(--box); color: var(--accent); border: 1px solid var(--line); padding: 5px 10px; font-size: 12px; }
.pane-btn:hover { border-color: var(--accent); }
.note-list { list-style: none; margin: 0; padding: 0; }
.note-list li { padding: 8px 0; border-bottom: 1px solid var(--line); }
.note-list li:last-child { border-bottom: 0; }
.note-body { white-space: pre-wrap; word-break: break-word; cursor: text; font-size: 13px; }
.note-list textarea { background: var(--box); font-size: 13px; }
.note-meta { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--muted); margin-top: 2px; }
.ev-li { cursor: pointer; font-size: 13px; }
.ev-li:hover .t { color: var(--accent); }
.ev-when { font-size: 12px; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }

/* Dialog */
.dlg { border: 1px solid var(--line); background: var(--box); color: var(--text); padding: 18px; width: min(460px, calc(100vw - 24px)); max-height: calc(100vh - 24px); }
.dlg::backdrop { background: rgba(0,0,0,.45); }
.form { display: grid; gap: 10px; }
.form label { display: grid; gap: 4px; font-size: 13px; }
.form label.check { display: flex; align-items: center; gap: 6px; }
.form label.check input { width: auto; margin: 0; }
.form select { width: 100%; color: var(--text); }
.dt-row { display: grid; grid-template-columns: 44px minmax(0, 1fr) 62px 62px; gap: 6px; align-items: center; font-size: 13px; }
.dt-row .tsel { padding: 7px 4px; }
.form.is-allday .tsel { visibility: hidden; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.color-row { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.color-row > span:first-child { width: 44px; }
.dlg-foot { display: flex; gap: 8px; margin-top: 4px; }
.dlg-foot .sp { flex: 1; }

/* Login */
.login { display: grid; place-items: center; min-height: 100vh; }
.login-box { width: min(320px, 90vw); display: grid; gap: 10px; }
.err { color: var(--down); }