:root{
  --bg:#f4f5f7; --surface:#ffffff; --surface-alt:#fafbfc;
  --border:#e3e5ea; --text:#1f2430; --text-soft:#6b7280; --text-faint:#9aa1ac;
  --accent:#6366f1; --accent-soft:#eef0ff;
  --danger:#ef4444; --danger-soft:#fee2e2;
  --amber:#f59e0b; --amber-soft:#fef3c7;
  --green:#16a34a; --green-soft:#dcfce7;
  --radius:12px; --radius-sm:8px;
  --shadow:0 1px 3px rgba(20,20,40,.06), 0 1px 2px rgba(20,20,40,.04);
  --shadow-lg:0 12px 32px rgba(20,20,40,.14);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;}
body{margin:0;background:var(--bg);color:var(--text);height:100vh;overflow:hidden;}
#app{max-width:1400px;margin:0 auto;padding:20px 24px;height:100vh;box-sizing:border-box;display:flex;flex-direction:column;}

header.top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap;flex-shrink:0;}
.brand{display:flex;align-items:center;gap:10px;}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);}
.brand h1{font-size:19px;margin:0;font-weight:700;letter-spacing:-.2px;}

nav.tabs{display:flex;gap:4px;background:var(--surface);padding:4px;border-radius:10px;box-shadow:var(--shadow);flex-wrap:wrap;}
nav.tabs button{border:none;background:transparent;padding:8px 14px;border-radius:8px;font-size:13.5px;font-weight:600;color:var(--text-soft);cursor:pointer;transition:.15s;}
nav.tabs button:hover{background:var(--surface-alt);}
nav.tabs button.active{background:var(--accent);color:#fff;}

.toolbar{display:flex;align-items:center;gap:10px;}
.toolbar-menu-wrap{position:relative;}
.toolbar-menu{display:flex;align-items:center;gap:10px;}
button.toolbar-more-btn{display:none;}
.btn{border:none;border-radius:9px;padding:8px 14px;font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:6px;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:#5254e0;}
.btn-ghost{background:var(--surface);color:var(--text);box-shadow:var(--shadow);}
.btn-ghost:hover{background:var(--surface-alt);}
.btn-danger{background:var(--danger-soft);color:var(--danger);}
.btn-sm{padding:5px 10px;font-size:12.5px;border-radius:7px;}
.icon-btn{width:30px;height:30px;border-radius:8px;border:none;background:var(--surface);box-shadow:var(--shadow);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--text-soft);}
.icon-btn:hover{background:var(--surface-alt);color:var(--text);}

.view-panel{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:0;min-height:0;flex:1;overflow-y:auto;overflow-x:hidden;}
.view-body{padding:0 18px 18px 18px;}
.view-nav{display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--surface);z-index:6;padding:6px 18px 8px 18px;margin-bottom:8px;border-radius:var(--radius) var(--radius) 0 0;}
.view-nav .label{font-weight:700;font-size:15px;}
.view-nav .navbtns{display:flex;gap:6px;}

/* Item card */
.item-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:5px 8px;margin-bottom:4px;cursor:grab;transition:.12s;position:relative;border-left:4px solid var(--accent);}
.item-card.compact{padding:3px 6px;margin-bottom:3px;border-radius:7px;}
.item-card.compact .item-title{font-size:12px;}
.item-card.compact .check-circle{width:15px;height:15px;}
.item-card:hover{box-shadow:var(--shadow);transform:translateY(-1px);}
.item-card.completed{opacity:.5;}
.item-card.completed .item-title{text-decoration:line-through;}
.item-card.dragging{opacity:.35;}
.item-top{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.check-circle{width:18px;height:18px;border-radius:50%;border:2px solid var(--border);flex-shrink:0;cursor:pointer;margin-top:1px;display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;transition:.15s;}
.check-circle.done{background:var(--green);border-color:var(--green);}
.item-title{font-size:13.5px;font-weight:600;line-height:1.3;flex:1;min-width:60px;}
.item-meta{display:flex;flex-wrap:wrap;gap:5px;justify-content:flex-end;margin-left:auto;}
.tag{font-size:10.5px;font-weight:700;padding:2px 7px;border-radius:6px;display:inline-flex;align-items:center;gap:3px;white-space:nowrap;border:1.3px solid transparent;}
.tag-due-green{background:var(--green-soft);color:var(--green);border-color:rgba(22,163,74,.35);}
.tag-time{background:var(--accent-soft);color:var(--accent);border-color:rgba(99,102,241,.35);}
.item-group-icon{font-size:14px;line-height:1;flex-shrink:0;}
.tag-due-amber{background:var(--amber-soft);color:#b45309;border-color:rgba(180,83,9,.35);}
.tag-due-red{background:var(--danger-soft);color:var(--danger);border-color:rgba(239,68,68,.4);}
.tag-type{background:#eef0f4;color:var(--text-soft);border-color:rgba(107,114,128,.3);}
.tag-chk{background:#eef0f4;color:var(--text-soft);border-color:rgba(107,114,128,.3);}
.tag-moved{background:#ede9fe;color:#7c3aed;cursor:pointer;border-color:rgba(124,58,237,.35);}
.tag-moved:hover{background:#ddd6fe;}
.item-checklist{margin:3px 0 2px 45px;padding-top:3px;}
.chk-inline-row{display:flex;align-items:center;gap:6px;padding:1px 0;font-size:12px;cursor:pointer;}
.chk-inline-row input[type=checkbox]{width:13px;height:13px;flex-shrink:0;cursor:pointer;}
.chk-inline-text{color:var(--text-soft);}
.chk-inline-text.done{text-decoration:line-through;color:var(--text-faint);}
.chk-all-done{font-size:11.5px;color:var(--green);font-weight:600;padding:1px 0;}
.chk-add-row{margin-top:1px;}
.chk-add-btn{background:none;border:none;color:var(--accent);font-size:11.5px;font-weight:700;cursor:pointer;padding:2px 0;}
.chk-add-btn:hover{text-decoration:underline;}
.chk-add-input{width:100%;padding:5px 8px;font-size:12px;border:1.5px solid var(--accent);border-radius:6px;font-family:inherit;}

/* FLAGS */
.flag-countdown{background:linear-gradient(90deg,var(--amber-soft),transparent);border-left:3px solid var(--amber);padding:8px 12px;border-radius:8px;font-size:12.5px;font-weight:600;color:#92400e;margin-bottom:14px;}

/* DAY VIEW */
.day-sticky-top{position:sticky;top:0;background:var(--surface);z-index:6;padding:6px 18px 10px 18px;margin-bottom:4px;border-radius:var(--radius) var(--radius) 0 0;box-shadow:0 4px 6px -6px rgba(20,20,40,.15);}
.day-list{display:flex;flex-direction:column;}
.item-card.drop-target{outline:2px dashed var(--accent);outline-offset:-2px;}
.hour-divider{font-size:11px;font-weight:700;color:var(--text-faint);text-transform:uppercase;letter-spacing:.5px;margin:16px 0 8px;padding-top:12px;border-top:1px solid var(--border);}
.hour-timeline{display:flex;flex-direction:column;}
.hour-row{display:flex;gap:12px;border-top:1px solid var(--border);padding:8px 0;}
.hour-row:first-child{border-top:none;}
.hour-row.empty-hour{padding:3px 0;}
.hour-row.empty-hour .hour-row-label{font-size:9.5px;color:var(--text-faint);opacity:.6;padding-top:0;}
.hour-row.empty-hour .hour-row-items{min-height:8px;}
.hour-row.empty-hour .hour-row-items.dragover{min-height:22px;}
.hour-row-label{width:52px;flex-shrink:0;font-size:11px;font-weight:700;color:var(--text-faint);padding-top:2px;transition:all .1s;}
.hour-row-items{flex:1;display:flex;flex-direction:column;gap:6px;min-height:22px;border-radius:8px;transition:background .1s, min-height .1s;}
.hour-row-items.dragover{background:var(--accent-soft);outline:2px dashed var(--accent);}
.hour-row-items .item-card{margin-bottom:0;}
.hour-flag-marker{background:var(--amber-soft);color:#92400e;font-size:11px;font-weight:700;padding:5px 10px;border-radius:7px;cursor:pointer;border:1.3px dashed rgba(180,83,9,.45);width:100%;box-sizing:border-box;}
.hour-flag-marker:hover{background:#fde8b8;}
.hour-flag-marker.past{opacity:.5;}
.week-flag-marker{border-bottom:1.3px dashed rgba(180,83,9,.55);margin:4px 0;cursor:pointer;height:0;}
.week-flag-marker:hover{border-bottom-color:rgba(146,64,14,.9);}
.hour-row.now-hour{background:rgba(239,68,68,.08);border-radius:8px;margin:0 -8px;padding-left:8px;padding-right:8px;}
.hour-row.now-hour .hour-row-label{color:var(--danger);font-weight:700;}
.quick-add-row{margin-top:6px;}
.quick-add-btn{width:100%;background:none;border:1.5px dashed var(--border);color:var(--text-faint);font-size:12px;font-weight:700;padding:7px;border-radius:8px;cursor:pointer;}
.quick-add-btn:hover{border-color:var(--accent);color:var(--accent);}
.quick-add-input{width:100%;padding:7px 9px;font-size:13px;border:1.5px solid var(--accent);border-radius:8px;font-family:inherit;}

/* WEEK / BIWEEK */
.week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;}
.biweek-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;}
.biweek-layout{display:flex;gap:14px;align-items:flex-start;}
.biweek-layout .biweek-grid{flex:1;min-width:0;}
.pending-panel{width:190px;flex-shrink:0;background:var(--surface-alt);border:1.5px dashed var(--border);border-radius:10px;padding:10px;max-height:70vh;overflow-y:auto;position:sticky;}
.pending-panel-head{font-size:11px;font-weight:700;color:var(--text-faint);text-transform:uppercase;letter-spacing:.4px;margin-bottom:8px;}
.pending-panel .item-card{cursor:grab;}
.day-col{background:var(--surface-alt);border-radius:10px;padding:8px;min-height:160px;}
.day-col.today{background:var(--accent-soft);}
.day-col-head{font-size:11px;font-weight:700;color:var(--text-soft);margin-bottom:8px;text-transform:uppercase;display:flex;justify-content:space-between;transition:color .1s;}
.day-col-head:hover{color:var(--accent);}
.day-col.dragover{outline:2px dashed var(--accent);}

/* GROUPS / KANBAN */
.kanban{display:flex;flex-wrap:wrap;gap:14px;}
.kanban-col{flex:1 1 260px;max-width:340px;background:var(--surface-alt);border-radius:10px;padding:10px;transition:outline .1s;}
.kanban-col.dragover{outline:2px dashed var(--accent);outline-offset:-2px;}
.kanban-col.dragging{opacity:.4;}
.kanban-col-head{cursor:grab;}
.drag-grip{color:var(--text-faint);font-size:12px;cursor:grab;}
.completed-toggle{width:100%;background:none;border:none;color:var(--text-faint);font-size:11.5px;font-weight:700;padding:6px 2px;cursor:pointer;text-align:left;}
.completed-toggle:hover{color:var(--text-soft);}
.kanban-col-head{display:flex;align-items:center;gap:8px;margin-bottom:10px;font-weight:700;font-size:13.5px;}
.kanban-col-head .swatch{width:11px;height:11px;border-radius:4px;}
.kanban-col-head .count{margin-left:auto;font-size:11px;font-weight:600;color:var(--text-faint);background:#fff;padding:1px 7px;border-radius:20px;}

/* HABIT TRACKER */
.habit-vwrap{max-height:72vh;overflow:auto;border-radius:10px;}
.habit-table-v{width:100%;border-collapse:separate;border-spacing:0;}
.habit-table-v thead th{position:sticky;top:0;background:var(--surface);z-index:2;box-shadow:0 1px 0 var(--border);}
.habit-day-head{width:70px;text-align:left !important;font-size:10.5px;color:var(--text-faint);font-weight:700;padding:6px 8px;}
.habit-col-head{font-size:12px;font-weight:700;padding:6px 10px;text-align:center;white-space:nowrap;border-left:1px solid var(--border);}
.habit-col-head .streak{font-size:10px;font-weight:600;color:var(--text-faint);}
.habit-day-cell{font-size:11.5px;color:var(--text-soft);font-weight:600;padding:5px 8px;white-space:nowrap;}
tr.today-row .habit-day-cell{color:var(--accent);font-weight:700;}
tr.today-row{background:var(--accent-soft);}
.habit-table-v td{text-align:center;padding:4px;border-left:1px solid var(--border);}
.habit-cell{width:22px;height:22px;border-radius:6px;border:1px solid var(--border);background:#fff;transition:.1s;margin:0 auto;}
.habit-cell.done{border-color:transparent;}
.streak{font-size:10.5px;color:var(--text-faint);font-weight:600;margin-left:6px;}

/* Empty state */
.empty{text-align:center;padding:50px 20px;color:var(--text-faint);}
.empty .big{font-size:32px;margin-bottom:8px;}

/* MODAL */
.overlay{position:fixed;inset:0;background:rgba(20,20,35,.4);display:none;align-items:flex-start;justify-content:center;z-index:100;padding:40px 16px;overflow-y:auto;}
.overlay.open{display:flex;}
.modal{background:var(--surface);border-radius:16px;box-shadow:var(--shadow-lg);width:100%;max-width:520px;padding:24px;}
.modal h2{margin:0 0 16px;font-size:17px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12px;font-weight:700;color:var(--text-soft);margin-bottom:5px;}
.field input[type=text],.field input[type=email],.field input[type=date],.field input[type=time],.field input[type=number],.field textarea,.field select{
  width:100%;padding:8px 10px;border:1.5px solid var(--border);border-radius:8px;font-size:13.5px;font-family:inherit;background:#fff;color:var(--text);
}
.field textarea{resize:vertical;min-height:50px;}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;}
.segmented{display:flex;gap:6px;flex-wrap:wrap;}
.segmented button{flex:1;border:1.5px solid var(--border);background:#fff;padding:7px 8px;border-radius:8px;font-size:12.5px;font-weight:600;color:var(--text-soft);cursor:pointer;min-width:70px;}
.segmented button.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);}
.weekday-picker{display:flex;gap:5px;}
.weekday-picker button{width:34px;height:34px;border-radius:50%;border:1.5px solid var(--border);background:#fff;font-size:11.5px;font-weight:700;color:var(--text-soft);cursor:pointer;}
.weekday-picker button.active{background:var(--accent);border-color:var(--accent);color:#fff;}
.checklist-editor .chk-row{display:flex;align-items:center;gap:7px;margin-bottom:6px;}
.checklist-editor .chk-row.dragging{opacity:.4;}
.checklist-editor .chk-row.drop-target{outline:2px dashed var(--accent);border-radius:6px;}
.chk-grip{color:var(--text-faint);font-size:13px;cursor:grab;flex-shrink:0;}
.checklist-editor .chk-row input[type=text]{flex:1;padding:6px 9px;font-size:13px;}
.checklist-editor .chk-row input[type=checkbox]{width:16px;height:16px;}
.remove-x{background:none;border:none;color:var(--text-faint);cursor:pointer;font-size:15px;padding:2px 6px;}
.remove-x:hover{color:var(--danger);}
.modal-actions{display:flex;justify-content:space-between;margin-top:20px;gap:10px;}
.color-dot-input{display:flex;align-items:center;gap:8px;}
.color-dot-input input[type=color]{width:36px;height:36px;border:none;border-radius:8px;cursor:pointer;padding:0;background:none;}

.group-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border);}
.group-row input[type=text]{flex:1;padding:6px 9px;font-size:13px;border:1.5px solid var(--border);border-radius:7px;}
.group-icon-input{flex:0 0 44px !important;text-align:center;font-size:16px !important;padding:6px 4px !important;}

.fab{position:fixed;bottom:28px;right:28px;width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:26px;box-shadow:0 8px 20px rgba(99,102,241,.4);cursor:pointer;z-index:50;line-height:1;}
.fab:hover{background:#5254e0;}

.toast{position:fixed;bottom:28px;left:28px;background:var(--text);color:#fff;padding:10px 16px;border-radius:9px;font-size:13px;font-weight:600;opacity:0;transform:translateY(8px);transition:.25s;pointer-events:none;z-index:200;}
.toast.show{opacity:1;transform:translateY(0);}

::-webkit-scrollbar{height:8px;width:8px;}
::-webkit-scrollbar-thumb{background:#d7d9df;border-radius:8px;}

@media(max-width:900px){
  .week-grid,.biweek-grid{grid-template-columns:repeat(2,1fr);}
  .biweek-layout{flex-direction:column;}
  .pending-panel{width:100%;max-height:220px;position:static;}
}
@media(max-width:820px){
  button.toolbar-more-btn{display:flex;}
  .toolbar-menu{display:none;position:absolute;top:38px;right:0;background:var(--surface);box-shadow:var(--shadow-lg);border-radius:10px;padding:8px;flex-direction:column;gap:6px;z-index:50;}
  .toolbar-menu.open{display:flex;}
}
.modal-hint{font-size:12px;color:var(--text-soft);margin:-8px 0 14px;line-height:1.5;}
#accountOverlay .btn,#accountOverlay .field input{min-height:44px;}
#btnAccount.signed-in{position:relative;}
#btnAccount.signed-in::after{content:'';position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:#16a34a;}
#btnAccount.signed-in.sync-pending::after{background:#f59e0b;}
#btnAccount.signed-in.sync-error::after{background:#dc2626;}