:root {
  --bg: #f1f5f9; --panel: #ffffff; --panel-2: #f8fafc; --text: #0f172a; --muted: #64748b;
  --border: #e2e8f0; --accent: #3b82f6; --accent-text: #fff; --danger: #dc2626; --ok: #10b981;
  --warn: #f59e0b; --shadow: 0 1px 3px rgba(15,23,42,.08), 0 4px 14px rgba(15,23,42,.05);
  --radius: 12px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1120; --panel: #131c2e; --panel-2: #0f172a; --text: #e2e8f0; --muted: #94a3b8;
    --border: #23304a; --accent: #60a5fa; --accent-text: #0b1120; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1120; --panel: #131c2e; --panel-2: #0f172a; --text: #e2e8f0; --muted: #94a3b8;
  --border: #23304a; --accent: #60a5fa; --accent-text: #0b1120; --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button, input, select, textarea { font: inherit; color: inherit; }
.muted { color: var(--muted); } .small { font-size: 13px; }

/* top bar */
.topbar { display: flex; align-items: center; gap: 16px; padding: 10px 20px; background: var(--panel);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; }
.today-label { color: var(--muted); flex: 1; }
.top-actions { display: flex; gap: 6px; }

.btn { border: 1px solid var(--border); background: var(--panel-2); padding: 7px 12px; border-radius: 9px;
  cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.ghost { background: transparent; border-color: transparent; font-size: 17px; padding: 5px 9px; }

/* agenda strip */
.agenda { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; padding: 16px 20px 0; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; box-shadow: var(--shadow); min-width: 0; }
.stat .k { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.stat .v { font-size: 22px; font-weight: 700; }
.stat .sub { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat.alert .v { color: var(--danger); }

/* layout */
.layout { display: grid; grid-template-columns: minmax(280px, 1fr) minmax(0, 2.2fr) minmax(280px, 1fr);
  gap: 16px; padding: 16px 20px 24px; align-items: start; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow); min-width: 0; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.panel h2 { font-size: 16px; margin: 0; }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.seg button { border: 0; background: transparent; padding: 4px 9px; cursor: pointer; font-size: 13px; }
.seg button.on { background: var(--accent); color: var(--accent-text); }

.quick-add { display: flex; gap: 6px; margin-bottom: 10px; }
.quick-add input { min-width: 0; }
.quick-add #quickTaskTitle { flex: 1; }
.quick-add #quickTaskDue { width: 135px; }
input, select, textarea { background: var(--panel-2); border: 1px solid var(--border); border-radius: 9px; padding: 7px 10px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }
input[type=checkbox] { width: auto; accent-color: var(--accent); }

.task-list { list-style: none; margin: 0; padding: 0; max-height: 68vh; overflow: auto; }
.task-group { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 12px 2px 4px; }
.task { display: flex; gap: 10px; align-items: flex-start; padding: 8px 6px; border-radius: 8px; cursor: pointer; }
.task:hover { background: var(--panel-2); }
.task .tick { width: 20px; height: 20px; flex: none; border-radius: 50%; border: 2px solid var(--muted); margin-top: 1px;
  display: grid; place-items: center; font-size: 12px; color: transparent; cursor: pointer; background: transparent; padding: 0; }
.task .tick.p1 { border-color: var(--danger); } .task .tick.p5 { border-color: var(--warn); } .task .tick.p9 { border-color: var(--accent); }
.task.done .tick { background: var(--ok); border-color: var(--ok); color: #fff; }
.task.done .t-title { text-decoration: line-through; color: var(--muted); }
.task .t-body { min-width: 0; flex: 1; }
.task .t-title { overflow-wrap: anywhere; }
.task .t-meta { font-size: 12px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.task .t-meta .late { color: var(--danger); font-weight: 600; }
.empty { color: var(--muted); text-align: center; padding: 22px 6px; font-size: 14px; }

/* notes */
.search { max-width: 160px; padding: 5px 10px; }
.note-grid { display: grid; gap: 10px; max-height: 72vh; overflow: auto; }
.note { background: var(--panel-2); border: 1px solid var(--border); border-left: 4px solid var(--warn); border-radius: 10px;
  padding: 10px 12px; cursor: pointer; }
.note:hover { border-color: var(--accent); border-left-color: var(--warn); }
.note h4 { margin: 0 0 4px; font-size: 14px; overflow-wrap: anywhere; }
.note p { margin: 0; font-size: 13px; color: var(--muted); white-space: pre-wrap; overflow-wrap: anywhere;
  display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }
.note .n-meta { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; font-size: 11px; color: var(--muted); }
.tag { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); border-radius: 99px; padding: 1px 8px; }

/* calendar */
.calendar-panel { padding: 12px; }
#calendar { --fc-border-color: var(--border); --fc-page-bg-color: var(--panel); --fc-neutral-bg-color: var(--panel-2);
  --fc-today-bg-color: color-mix(in srgb, var(--accent) 10%, transparent); --fc-list-event-hover-bg-color: var(--panel-2);
  --fc-button-bg-color: var(--panel-2); --fc-button-border-color: var(--border); --fc-button-text-color: var(--text);
  --fc-button-hover-bg-color: var(--border); --fc-button-hover-border-color: var(--border);
  --fc-button-active-bg-color: var(--accent); --fc-button-active-border-color: var(--accent); }
.fc .fc-button-primary:not(:disabled).fc-button-active { color: var(--accent-text); }
.fc .fc-toolbar-title { font-size: 18px; }
.fc .fc-button { padding: 4px 10px; font-size: 14px; text-transform: capitalize; }
.fc a { color: inherit; text-decoration: none; }
.fc .fc-event { cursor: pointer; }
.fc .task-event { opacity: .85; border-style: dashed !important; }
.check-inline { display: inline-flex !important; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); margin-top: 8px; }

/* dialogs */
dialog { border: 1px solid var(--border); border-radius: 14px; padding: 0; background: var(--panel); color: var(--text);
  width: min(520px, calc(100vw - 24px)); box-shadow: 0 20px 60px rgba(0,0,0,.35); }
dialog.wide { width: min(760px, calc(100vw - 24px)); }
dialog::backdrop { background: rgba(2,6,23,.55); }
.dlg { padding: 18px; display: grid; gap: 10px; }
.dlg h3 { margin: 0 0 4px; }
.dlg label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.dlg .row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: end; }
.dlg-actions { display: flex; gap: 8px; margin-top: 6px; }
.spacer { flex: 1; }
.note-title-input { font-size: 18px; font-weight: 600; }
.note-body-input { resize: vertical; min-height: 240px; line-height: 1.5; }
.pin { align-self: center; }

.toast { position: fixed; bottom: 84px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 9px 16px; border-radius: 10px; z-index: 50; font-size: 14px; }

.tabbar { display: none; }
.fab { display: none; }

/* login */
.login-body { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 28px; width: min(360px, 100%);
  display: grid; gap: 12px; box-shadow: var(--shadow); text-align: center; }
.login-card img { margin: 0 auto; }
.login-card h1 { margin: 0; font-size: 22px; }
.login-card p { margin: 0 0 6px; }
.login-card label { display: grid; gap: 4px; text-align: left; font-size: 13px; color: var(--muted); }
.login-card .btn { padding: 10px; }
.login-error { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); border-radius: 8px; padding: 8px; font-size: 14px; }

/* responsive */
@media (max-width: 1200px) {
  .layout { grid-template-columns: minmax(260px, 1fr) minmax(0, 2fr); }
  #panelNotes { grid-column: 1 / -1; }
  .note-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); max-height: none; }
}
@media (max-width: 760px) {
  body { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  .topbar { padding: 8px 16px; gap: 8px; }
  .today-label, .top-actions .btn:not(.ghost) { display: none; }
  .top-actions { margin-left: auto; }
  .agenda { grid-template-columns: repeat(2, 1fr); padding: 12px 16px 0; gap: 8px; }
  .stat { padding: 9px 11px; } .stat .v { font-size: 18px; }
  .layout { display: block; padding: 12px 16px; }
  .layout > .panel { display: none; }
  .layout > .panel.on { display: block; }
  .task-list, .note-grid { max-height: none; }
  .note-grid { grid-template-columns: 1fr; }
  .fc .fc-toolbar { flex-wrap: wrap; gap: 6px; }
  .fc .fc-toolbar-title { font-size: 16px; }
  .quick-add #quickTaskDue { width: 120px; }
  .dlg .row { grid-template-columns: 1fr; }
  .tabbar { display: flex; position: fixed; bottom: 0; left: 0; right: 0; background: var(--panel); border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom); z-index: 10; }
  .tabbar button { flex: 1; border: 0; background: transparent; padding: 8px 0 10px; display: grid; gap: 2px; font-size: 18px; cursor: pointer; }
  .tabbar button span { font-size: 11px; color: var(--muted); }
  .tabbar button.on span { color: var(--accent); font-weight: 600; }
  .fab { position: fixed; right: 16px; bottom: calc(76px + env(safe-area-inset-bottom)); width: 54px; height: 54px; border-radius: 50%;
    background: var(--accent); color: var(--accent-text); border: 0; font-size: 28px; box-shadow: 0 6px 20px rgba(0,0,0,.3); z-index: 11; display: block; }
}