:root{
  --bg:#f5f6f8;
  --surface:#ffffff;
  --surface-2:#fafbfc;
  --border:#e6e8ec;
  --text:#1f2430;
  --muted:#8a909c;
  --accent:#4f46e5;
  --accent-hover:#4338ca;
  --accent-soft:#eef0fe;
  --danger:#e5484d;
  --high:#f97316;
  --low:#0ea5e9;
  --green:#16a34a;
  --shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.10);
  --radius:14px;
  --radius-sm:10px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important;}
.muted{color:var(--muted);}

/* Header */
.app{max-width:880px;margin:0 auto;padding:0 16px 72px;}
.header{display:flex;align-items:center;justify-content:space-between;padding:20px 4px 14px;gap:10px;}
.brand{font-size:22px;font-weight:700;display:flex;align-items:center;gap:8px;}
.brand span{letter-spacing:-.2px;}
.header-actions{display:flex;gap:8px;flex-shrink:0;}
.ghost-btn{
  background:var(--surface);border:1px solid var(--border);color:var(--text);
  padding:8px 12px;border-radius:999px;cursor:pointer;font-size:13px;font-weight:600;
  transition:.15s;white-space:nowrap;
}
.ghost-btn:hover{background:var(--surface-2);border-color:#d6d9df;}
.ghost-btn.on{background:var(--accent-soft);border-color:#c7cbf7;color:var(--accent);}

/* Tabs */
.tabs{
  display:flex;gap:4px;background:var(--surface);border:1px solid var(--border);
  padding:5px;border-radius:999px;box-shadow:var(--shadow);
  position:sticky;top:8px;z-index:5;overflow-x:auto;
}
.tab{
  flex:1;min-width:max-content;border:none;background:transparent;color:var(--muted);
  padding:9px 14px;border-radius:999px;cursor:pointer;font-size:14px;font-weight:600;
  white-space:nowrap;transition:.15s;
}
.tab:hover{color:var(--text);}
.tab.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(79,70,229,.35);}

/* Panels */
.content{margin-top:18px;}
.tab-panel{display:none;animation:fade .2s ease;}
.tab-panel.active{display:block;}
@keyframes fade{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:none;}}

/* Add bar & inputs */
.add-bar{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.input{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:11px 13px;font-size:14px;color:var(--text);outline:none;transition:.15s;
  font-family:inherit;
}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
.grow{flex:1;min-width:160px;}
.textarea{width:100%;min-height:140px;resize:vertical;line-height:1.5;}

/* Buttons */
.btn{
  border:none;border-radius:var(--radius-sm);padding:11px 16px;font-size:14px;
  font-weight:600;cursor:pointer;transition:.15s;font-family:inherit;
}
.btn.primary{background:var(--accent);color:#fff;}
.btn.primary:hover{background:var(--accent-hover);}
.btn.block{width:100%;}
.btn.danger-btn{background:#fdecec;color:var(--danger);}
.btn.danger-btn:hover{background:#fbdcdc;}

/* Lists & cards */
.list{display:flex;flex-direction:column;gap:10px;}
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px;display:flex;align-items:flex-start;gap:12px;box-shadow:var(--shadow);
  transition:.2s;
}
.card:hover{border-color:#d6d9df;}
.todo.todo-high{border-left:4px solid var(--high);}
.todo-body{flex:1;min-width:0;}
.todo-title{font-weight:600;font-size:15px;word-break:break-word;}
.todo-desc{color:var(--muted);font-size:13px;margin-top:3px;word-break:break-word;white-space:pre-wrap;}
.todo-meta{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap;}
.meta-due,.meta-done{font-size:12px;color:var(--muted);}
.card-actions{display:flex;gap:2px;flex-shrink:0;}
.icon-btn{
  background:transparent;border:none;cursor:pointer;font-size:15px;padding:6px;
  border-radius:8px;transition:.15s;line-height:1;
}
.icon-btn:hover{background:var(--surface-2);}
.icon-btn.danger:hover{background:#fdecec;}

/* Checkbox */
.check{
  width:24px;height:24px;border:2px solid #cfd3db;border-radius:50%;
  background:var(--surface);cursor:pointer;flex-shrink:0;margin-top:1px;
  transition:.15s;padding:0;
}
.check:hover{border-color:var(--accent);}
.check.checked{
  border-color:var(--green);background:var(--green);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
}
.todo.completing{opacity:0;transform:translateX(40px);}
.done-title{text-decoration:line-through;color:var(--muted);}

/* Badges */
.badge{font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;white-space:nowrap;}
.badge-high{background:#fff1e6;color:var(--high);}
.badge-normal{background:var(--accent-soft);color:var(--accent);}
.badge-low{background:#e6f6fe;color:var(--low);}

/* Notes */
.note-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;}
.note-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px;cursor:pointer;box-shadow:var(--shadow);transition:.2s;position:relative;
  min-height:120px;display:flex;flex-direction:column;
}
.note-card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(16,24,40,.08);}
.note-card.pinned{background:#fffdf5;border-color:#f3e6b3;}
.pin-btn{
  position:absolute;top:8px;right:8px;background:transparent;border:none;cursor:pointer;
  font-size:14px;opacity:.55;padding:2px;
}
.pin-btn:hover{opacity:1;}
.note-title{font-weight:700;font-size:15px;margin-bottom:6px;padding-right:22px;word-break:break-word;}
.note-content{
  font-size:13px;color:#4b5160;line-height:1.5;flex:1;white-space:pre-wrap;overflow:hidden;
  display:-webkit-box;-webkit-line-clamp:6;-webkit-box-orient:vertical;
}
.note-date{font-size:11px;color:var(--muted);margin-top:10px;}

/* Alarms */
.alarm-icon{font-size:22px;line-height:1.1;}

/* Empty state */
.empty{
  text-align:center;color:var(--muted);padding:48px 16px;font-size:14px;
  background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);
}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(16,24,40,.45);display:none;
  align-items:center;justify-content:center;padding:16px;z-index:50;
}
.modal-overlay.open{display:flex;}
.modal-card{
  background:var(--surface);border-radius:18px;padding:20px;width:100%;max-width:460px;
  box-shadow:0 20px 50px rgba(16,24,40,.25);animation:pop .18s ease;
}
@keyframes pop{from{opacity:0;transform:scale(.96);}to{opacity:1;transform:none;}}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.modal-head h3{margin:0;font-size:18px;}
.modal-card .input{width:100%;margin-bottom:12px;}
.field-label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:5px;}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:6px;}

/* Login */
.login-overlay{
  position:fixed;inset:0;background:linear-gradient(160deg,#eef0fe,#f5f6f8);
  display:none;align-items:center;justify-content:center;padding:20px;z-index:100;
}
.login-overlay.open{display:flex;}
.login-card{
  background:var(--surface);border:1px solid var(--border);border-radius:20px;
  padding:32px 28px;width:100%;max-width:360px;text-align:center;
  box-shadow:0 12px 40px rgba(16,24,40,.12);
}
.login-logo{font-size:44px;}
.login-card h1{margin:8px 0 2px;font-size:22px;}
.login-card .input{width:100%;margin:18px 0 12px;}
.login-error{color:var(--danger);font-size:13px;margin-top:10px;min-height:18px;}
.g-signin{display:flex;justify-content:center;margin:18px 0 4px;min-height:44px;}

/* Settings */
.setting-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow);margin-bottom:12px;
}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px;}
.setting-row:last-child{margin-bottom:0;}
.setting-title{font-weight:700;font-size:15px;}
.setting-title-sm{font-weight:600;font-size:14px;}
.setting-desc{color:var(--muted);font-size:13px;line-height:1.5;margin-top:4px;}
.setting-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;flex-wrap:wrap;}
.setting-hint{color:var(--muted);font-size:12px;margin-top:10px;line-height:1.5;}
.setting-card code{background:var(--surface-2);border:1px solid var(--border);padding:1px 6px;border-radius:6px;font-size:12px;}
.setting-foot .input,.setting-row .input{min-width:130px;}

/* Toggle switch */
.switch{position:relative;display:inline-block;width:46px;height:26px;flex-shrink:0;}
.switch input{opacity:0;width:0;height:0;}
.slider{position:absolute;inset:0;background:#cfd3db;border-radius:999px;transition:.2s;cursor:pointer;}
.slider:before{
  content:"";position:absolute;width:20px;height:20px;left:3px;top:3px;background:#fff;
  border-radius:50%;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.25);
}
.switch input:checked + .slider{background:var(--accent);}
.switch input:checked + .slider:before{transform:translateX(20px);}

/* Toast */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:#1f2430;color:#fff;padding:11px 18px;border-radius:999px;font-size:14px;
  font-weight:500;opacity:0;pointer-events:none;transition:.25s;z-index:200;
  box-shadow:0 8px 24px rgba(0,0,0,.2);max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* Responsive */
@media (max-width:600px){
  .header{padding-top:16px;}
  .brand{font-size:19px;}
  .ghost-btn{padding:7px 10px;font-size:12px;}
  .grow{min-width:100%;}
  .tab{font-size:13px;padding:8px 11px;}
}