:root{
  --ink:#1a1a1a;
  --ink-soft:#4a4a4a;
  --paper:#ffffff;
  --surface:#fafafa;
  --sidebar-bg:#f4f6f8;
  --line:#e6e6e6;
  --line-strong:#d0d0d0;
  --gray:#8a8a8a;
  --accent:#0f9d8c;
  --danger:#e0524d;
  --radius:12px;
  --shadow:0 1px 2px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.05);
  --font-body:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{
  background:var(--surface);
  color:var(--ink);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
  height:100%;
}
h1,h2{ font-weight:650; letter-spacing:-0.01em; }
.mono{ font-family:var(--font-mono); }
ul{ list-style:none; }

/* The [hidden] attribute has the same CSS specificity as a class that
   sets display (like .event-form{display:flex}), so without this rule
   whichever one is declared later in the stylesheet wins — which was
   silently showing the event form and active-task banner on page load
   before they were ever opened. !important guarantees hidden always
   wins regardless of what any other rule sets. */
[hidden]{ display:none !important; }

button{
  font-family:inherit;
  font-size:13px;
  font-weight:600;
  border:1px solid var(--line-strong);
  background:var(--paper);
  color:var(--ink);
  border-radius:8px;
  padding:9px 16px;
  cursor:pointer;
  transition:transform 0.08s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
button:hover{ border-color:var(--ink); }
button:active{ transform:scale(0.97); }
button.primary{ background:var(--ink); color:var(--paper); border-color:var(--ink); }
button.primary:hover{ box-shadow:0 2px 10px rgba(0,0,0,0.18); }
button.ghost{ background:transparent; border-color:transparent; color:var(--gray); text-decoration:underline; }
button.ghost:hover{ color:var(--ink); border-color:transparent; }
button.danger{ color:var(--danger); border-color:var(--danger); background:transparent; }
button.danger:hover{ background:var(--danger); color:#fff; }
button.icon-btn{
  width:30px; height:30px; padding:0;
  display:flex; align-items:center; justify-content:center;
  border-radius:50%;
  font-size:16px;
  line-height:1;
}

input[type="date"],input[type="time"],input[type="text"],select{
  font-family:inherit;
  font-size:13px;
  border:1px solid var(--line-strong);
  border-radius:8px;
  background:var(--paper);
  color:var(--ink);
  padding:8px 10px;
  outline:none;
  transition:border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus,select:focus{
  border-color:var(--ink);
  box-shadow:0 0 0 3px rgba(0,0,0,0.06);
}

/* ================= App layout ================= */
.app{
  display:flex;
  align-items:stretch;
  min-height:100vh;
}

/* ================= Sidebar ================= */
.sidebar{
  width:250px;
  flex-shrink:0;
  background:var(--sidebar-bg);
  border-right:1px solid var(--line);
  padding:20px 16px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.sidebar .brand{
  font-size:16px;
  font-weight:700;
  padding:0 4px;
}

.mini-cal{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
}
.mini-cal-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  font-weight:700;
  margin-bottom:10px;
}
.mini-cal-nav{ display:flex; gap:4px; }
.mini-cal-nav .icon-btn{ width:24px; height:24px; font-size:14px; }
.mini-cal-weekdays{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  text-align:center;
  font-size:10px;
  color:var(--gray);
  font-weight:600;
  margin-bottom:6px;
}
.mini-cal-grid{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:2px;
}
.mini-cal-grid .day-cell{
  aspect-ratio:1;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  border-radius:50%;
  cursor:pointer;
  color:var(--ink);
}
.mini-cal-grid .day-cell.muted{ color:var(--line-strong); }
.mini-cal-grid .day-cell:hover{ background:var(--surface); }
.mini-cal-grid .day-cell.today{ font-weight:700; color:var(--accent); }
.mini-cal-grid .day-cell.selected{ background:var(--ink); color:var(--paper); font-weight:700; }

.focus-card{
  background:var(--accent);
  color:#fff;
  border-radius:var(--radius);
  padding:16px;
}
.focus-label{
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.05em;
  opacity:0.75;
  margin-bottom:4px;
}
.focus-date{
  font-size:15px;
  font-weight:700;
  margin-bottom:10px;
}
.focus-next{
  font-size:12px;
  opacity:0.9;
  line-height:1.4;
}

.filters{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
}
.filters-title{
  font-size:12px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.04em;
  color:var(--gray);
  margin-bottom:10px;
}
.filter-row{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  padding:6px 0;
  cursor:pointer;
}
.filter-row input{ accent-color:var(--ink); width:15px; height:15px; }

/* ================= Main calendar ================= */
.main{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
}
.topbar{
  display:flex;
  align-items:center;
  gap:16px;
  padding:18px 24px;
  border-bottom:1px solid var(--line);
  background:var(--paper);
  flex-wrap:wrap;
}
.topbar-left{
  display:flex;
  align-items:center;
  gap:8px;
}
.topbar-left h1{
  font-size:17px;
  min-width:190px;
  text-align:center;
}
.view-toggle{
  display:flex;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:8px;
  padding:2px;
  margin-left:auto;
}
.view-toggle button{
  border:none;
  background:transparent;
  padding:6px 14px;
  border-radius:6px;
  color:var(--gray);
}
.view-toggle button.active{
  background:var(--paper);
  color:var(--ink);
  box-shadow:var(--shadow);
}

.active-banner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 24px;
  background:var(--ink);
  color:var(--paper);
  font-size:13px;
  animation:banner-in 0.25s ease;
}
.active-banner .active-label{ opacity:0.9; }
.active-banner .active-label strong{ font-weight:700; }
.active-banner .active-timer{
  font-size:13px;
  font-weight:600;
  background:rgba(255,255,255,0.15);
  padding:4px 10px;
  border-radius:6px;
  letter-spacing:0.02em;
}
@keyframes banner-in{
  from{ opacity:0; transform:translateY(-6px); }
  to{ opacity:1; transform:translateY(0); }
}

.notify-btn{
  width:100%;
  margin-top:6px;
  text-align:center;
  font-size:12px;
}
.notify-btn.enabled{ color:var(--accent); }
.notify-btn.blocked{ color:var(--danger); }

.event-form{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:12px;
  padding:14px 24px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.event-form .field{ display:flex; flex-direction:column; gap:5px; }
.event-form .field label{
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:0.05em;
  color:var(--gray);
  font-weight:600;
}
.event-form .field-grow{ flex:1; min-width:160px; }
.event-form .field-grow input{ width:100%; }
.form-hint{
  padding:6px 24px 0;
  font-size:12px;
  color:var(--ink-soft);
  min-height:14px;
}

.calendar-scroll{
  flex:1;
  overflow:auto;
  padding:0 24px 24px;
}
.calendar-header{
  display:flex;
  position:sticky;
  top:0;
  background:var(--surface);
  z-index:5;
  padding-top:16px;
  padding-bottom:8px;
}
.calendar-header .spacer{ width:52px; flex-shrink:0; }
.day-header{
  flex:1;
  text-align:center;
  min-width:0;
  padding:6px 4px;
  border-radius:8px;
}
.day-header.today{ background:#e8f6f3; }
.day-header .dow{
  font-size:11px;
  color:var(--gray);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.04em;
}
.day-header .dom{
  font-size:18px;
  font-weight:700;
  margin-top:2px;
}
.day-header.today .dom{ color:var(--accent); }

.calendar-body{
  display:flex;
  position:relative;
  min-width:0;
}
.hours-col{
  width:52px;
  flex-shrink:0;
  position:relative;
}
.hours-col .h{
  position:absolute;
  right:10px;
  transform:translateY(-50%);
  font-size:11px;
  color:var(--gray);
}
.days-row{
  display:flex;
  flex:1;
  min-width:0;
}
.day-col{
  flex:1;
  min-width:64px;
  position:relative;
  border-left:1px solid var(--line);
  background:var(--paper);
}
.day-col.today{ background:#fbfffe; }
.gridline{
  position:absolute;
  left:0; right:0;
  border-top:1px solid var(--line);
}

.block{
  position:absolute;
  left:4px; right:4px;
  border-radius:6px;
  padding:4px 8px;
  overflow:hidden;
  cursor:pointer;
  font-size:12px;
  font-weight:600;
  line-height:1.3;
  color:#1a1a1a;
  border-left:3px solid rgba(0,0,0,0.2);
  box-shadow:0 1px 2px rgba(0,0,0,0.05);
  transition:filter 0.12s ease, transform 0.08s ease;
}
.block:hover{ filter:brightness(0.96); z-index:5; }
.block:active{ transform:scale(0.99); }
.block .t{
  font-size:10px;
  font-weight:500;
  opacity:0.7;
}
.block.editing{ outline:2px solid var(--ink); outline-offset:2px; z-index:6; }

/* ================= To-do panel ================= */
.todo-panel{
  position:relative;
  width:300px;
  flex-shrink:0;
  background:var(--paper);
  border-left:1px solid var(--line);
  border-radius:0;
  box-shadow:none;
  padding:20px 0 24px;
}
.panel-header{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:0 20px 12px;
}
.panel-header h2{ font-size:15px; }
.panel-header .hint{ font-size:11px; color:var(--gray); }

.progress-track{
  margin:0 20px 6px;
  height:6px;
  border-radius:3px;
  background:var(--line);
  overflow:hidden;
}
.progress-fill{
  height:100%;
  width:0%;
  background:var(--accent);
  border-radius:3px;
  transition:width 0.3s ease;
}
.progress-label{
  margin:0 20px 16px;
  font-size:12px;
  color:var(--gray);
}
.todo-form{
  display:flex;
  gap:8px;
  margin:0 20px 16px;
}
.todo-form input{ flex:1; min-width:0; }

#todo-list{ padding:0 20px; }
#todo-list li{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 10px;
  margin-bottom:7px;
  border-radius:8px;
  border-left:4px solid var(--line-strong);
  background:var(--surface);
  transition:background 0.15s ease;
}
#todo-list li:hover{ background:#f0f0f0; }
#todo-list li input[type="checkbox"]{
  width:17px; height:17px; flex-shrink:0; cursor:pointer; accent-color:var(--accent);
}
#todo-list li .todo-text{ flex:1; font-size:13px; }
#todo-list li.done{ background:transparent; }
#todo-list li.done .todo-text{ text-decoration:line-through; color:var(--gray); }
#todo-list li .todo-remove{
  background:none; border:none; color:var(--gray);
  font-size:15px; line-height:1; cursor:pointer; padding:2px 4px; border-radius:4px;
}
#todo-list li .todo-remove:hover{ color:var(--ink); background:var(--line); }

.overlay{
  position:absolute;
  inset:0;
  background:var(--paper);
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:24px;
  z-index:10;
  animation:fadein 0.2s ease;
}
.overlay.show{ display:flex; }
@keyframes fadein{ from{opacity:0;} to{opacity:1;} }
.congrats-title{ font-size:18px; font-weight:700; margin-bottom:8px; }
.congrats-body{ font-size:13px; color:var(--gray); margin-bottom:20px; }

/* ================= Responsive ================= */
@media (max-width:1100px){
  .todo-panel{ width:260px; }
}
@media (max-width:900px){
  .app{ flex-direction:column; }
  .sidebar{
    width:100%;
    flex-direction:row;
    flex-wrap:wrap;
    align-items:flex-start;
    border-right:none;
    border-bottom:1px solid var(--line);
  }
  .sidebar .brand{ width:100%; }
  .mini-cal{ flex:1; min-width:220px; }
  .focus-card{ flex:1; min-width:180px; }
  .filters{ width:100%; }
  .todo-panel{
    width:100%;
    border-left:none;
    border-top:1px solid var(--line);
  }
}
@media (max-width:560px){
  .topbar{ padding:14px 16px; }
  .topbar-left h1{ min-width:0; font-size:14px; }
  .event-form,.form-hint{ padding-left:16px; padding-right:16px; }
  .calendar-scroll{ padding:0 12px 20px; }
  .active-banner{ padding:10px 16px; flex-wrap:wrap; }
}