:root{
  --bg: #121317;
  --panel: #1b1d23;
  --panel-2: #22242b;
  --border: #2e3038;
  --text: #f3f3f1;
  --text-dim: #9a9ca3;
  --accent: #6ee7d0;
  --accent-dim: #3a5a52;
  --red: #ef5a5a;
  --red-bg: #3a2224;
  --orange: #f2a154;
  --orange-bg: #3a2c1c;
  --yellow: #e8cf5e;
  --yellow-bg: #34301c;
}

*{ box-sizing: border-box; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  padding: 40px 20px 80px;
}

.wrap{
  max-width: 680px;
  margin: 0 auto;
}

header{
  margin-bottom: 24px;
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

h1{
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 28px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.subtitle{
  color: var(--text-dim);
  font-size: 14px;
  margin: 0;
}

.import-area{
  display:flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.import-btn-label{
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color .15s;
  white-space: nowrap;
}
.import-btn-label:hover{ border-color: var(--accent); }

button.import-btn-label{
  font-family: 'Inter', sans-serif;
}

.import-hint{
  font-size: 11px;
  color: var(--text-dim);
  max-width: 200px;
  text-align: right;
}

#importFileInput{ display: none; }

.view-toggle{
  display:flex;
  gap: 6px;
  margin: 24px 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  width: fit-content;
}

.view-toggle button{
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 7px 14px;
  border-radius: 7px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, color .15s;
}

.view-toggle button.active{
  background: var(--panel-2);
  color: var(--text);
}

.add-subject{
  display:flex;
  gap: 8px;
  margin-bottom: 24px;
}

input[type="text"], input[type="date"], select{
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  outline: none;
}

input[type="text"]:focus, input[type="date"]:focus, select:focus{
  border-color: var(--accent);
}

.add-subject input{ flex: 1; }

button.primary{
  background: var(--accent);
  color: #10201c;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}

button.primary:hover{ opacity: 0.88; }

button.ghost{
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 8px;
  padding: 9px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}

button.ghost:hover{
  border-color: var(--accent-dim);
  color: var(--text);
}

.subject{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}

.subject-head{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
}

.subject-head:hover{ background: var(--panel-2); }

.subject-title-group{
  display:flex;
  align-items:center;
  gap: 10px;
}

.caret{
  color: var(--text-dim);
  font-size: 11px;
  transition: transform .18s;
}

.subject.collapsed .caret{ transform: rotate(-90deg); }

.subject-name{
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 16px;
}

.count-pill{
  background: var(--panel-2);
  color: var(--text-dim);
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 100px;
}

.subject-actions button{
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13px;
  padding: 4px 6px;
}
.subject-actions button:hover{ color: var(--red); }

.subject-body{
  padding: 4px 18px 16px;
  border-top: 1px solid var(--border);
}

.subject.collapsed .subject-body{ display: none; }

.add-task-row{
  display:flex;
  gap: 8px;
  margin: 14px 0 12px;
  flex-wrap: wrap;
}

.add-task-row input[type="text"]{ flex: 1; min-width: 140px; }

.task{
  display:flex;
  align-items:center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 6px;
  background: var(--panel-2);
  border: 1px solid transparent;
}

.task.urgent-overdue{ background: var(--red-bg); border-color: rgba(239,90,90,0.35); }
.task.urgent-soon{ background: var(--orange-bg); border-color: rgba(242,161,84,0.35); }
.task.urgent-week{ background: var(--yellow-bg); border-color: rgba(232,207,94,0.3); }

.task.done{ opacity: 0.45; }
.task.done .task-title{ text-decoration: line-through; }

.task-check{
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--text-dim);
  cursor: pointer;
  flex-shrink: 0;
  background: transparent;
  display:flex;
  align-items:center;
  justify-content:center;
  color: var(--bg);
  font-size: 12px;
}
.task.done .task-check{ background: var(--accent); border-color: var(--accent); }

.task-info{ flex: 1; min-width: 0; }

.task-title{
  font-size: 14px;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.task-meta{
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge{
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 100px;
}
.badge.overdue{ background: var(--red); color: #2a0d0d; }
.badge.soon{ background: var(--orange); color: #2a1c0a; }
.badge.week{ background: var(--yellow); color: #2a250a; }

.task-delete{
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 15px;
  padding: 4px;
  flex-shrink: 0;
}
.task-delete:hover{ color: var(--red); }

.empty-state{
  color: var(--text-dim);
  font-size: 13px;
  padding: 18px 0;
  text-align: center;
}

select.recur-select{
  font-size: 13px;
  padding: 9px 8px;
}

.toast{
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--accent-dim);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 10;
}
.toast.show{ opacity: 1; }

::placeholder{ color: var(--text-dim); opacity: 0.7; }

@media (max-width: 480px){
  .add-task-row{ flex-direction: column; }
  .add-task-row input, .add-task-row select, .add-task-row button{ width: 100%; }
  header{ flex-direction: column; }
  .import-area{ align-items: flex-start; }
  .import-hint{ text-align: left; }
}