:root {
  --bg: #0a0a0b;
  --bg-elevated: #111113;
  --bg-card: #17171a;
  --bg-hover: #1f1f23;
  --border: #29292e;
  --border-soft: #1c1c20;
  --text-primary: #edecee;
  --text-secondary: #8f8f97;
  --text-muted: #55555d;
  --accent: #a1a1aa;
  --accent-soft: #a1a1aa1f;
  --accent-hover: #d4d4d8;
  --success: #7a8f7f;
  --success-soft: #7a8f7f22;
  --warning: #a99568;
  --warning-soft: #a9956822;
  --danger: #a97a7a;
  --danger-soft: #a97a7a22;
  --violet: #9494a3;
  --violet-soft: #9494a322;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
}

.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-soft);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px 24px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  box-shadow: 0 0 12px rgba(161, 161, 170, 0.4);
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
  flex: 1;
}

.logout-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}

.logout-btn:hover { color: var(--danger); border-color: var(--danger); background: var(--danger-soft); }

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--accent-soft); color: var(--accent-hover); }

.nav-icon { font-size: 14px; width: 16px; text-align: center; opacity: 0.8; }

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  margin: 20px 12px 8px;
}

.cat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.sidebar-footer { margin-top: auto; padding-top: 20px; }

.progress-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 14px;
}

.progress-card-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.progress-bar-track {
  height: 6px;
  background: var(--bg-hover);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-card-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Main */
.main {
  padding: 28px 36px 60px;
  max-width: 1000px;
  width: 100%;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 20px;
}

.topbar-title h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.4px;
}

.topbar-title p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.search-box {
  position: relative;
  min-width: 260px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.search-box input {
  width: 100%;
  padding: 9px 12px 9px 34px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.search-box input:focus { border-color: var(--accent); }

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.stat-icon {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.stat-icon-total { background: var(--accent-soft); color: var(--accent-hover); }
.stat-icon-active { background: var(--warning-soft); color: var(--warning); }
.stat-icon-done { background: var(--success-soft); color: var(--success); }
.stat-icon-progress { background: var(--violet-soft); color: var(--violet); }

.stat-value { font-size: 20px; font-weight: 700; line-height: 1.2; }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* Add task */
.add-task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr auto auto auto auto auto;
  gap: 10px;
  margin-bottom: 18px;
  align-items: center;
}

.add-task-card input[type="text"],
.add-task-card select,
.add-task-card input[type="date"] {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 9px 12px;
  font-size: 13px;
  outline: none;
}

.add-task-card input[type="text"] { min-width: 0; }
.add-task-card input:focus, .add-task-card select:focus { border-color: var(--accent); }

#addTaskBtn {
  background: var(--accent);
  color: #0a0a0b;
  border: none;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

#addTaskBtn:hover { background: var(--accent-hover); }

#taskLinkBtn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  padding: 9px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

#taskLinkBtn:hover { border-color: var(--accent); color: var(--text-primary); }
#taskLinkBtn.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-hover); }

#taskDeadlineBtn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  padding: 9px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

#taskDeadlineBtn:hover { border-color: var(--accent); color: var(--text-primary); }
#taskDeadlineBtn.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-hover); }

.link-input-row { margin: -10px 0 18px; }

.link-input-row input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 9px 12px;
  font-size: 13px;
  outline: none;
}

.link-input-row input:focus { border-color: var(--accent); }

.link-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
  background: var(--violet-soft);
  color: var(--violet);
  text-decoration: none;
  transition: opacity 0.15s;
}

.link-badge:hover { opacity: 0.8; }

.deadline-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
}

.deadline-normal { background: var(--bg-hover); color: var(--text-secondary); }
.deadline-soon { background: var(--warning-soft); color: var(--warning); }
.deadline-overdue { background: var(--danger-soft); color: var(--danger); }

/* Filter row */
.filter-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chips { display: flex; gap: 8px; flex-wrap: wrap; }

.chip {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.chip:hover { border-color: var(--accent); color: var(--text-primary); }
.chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-hover); }

#sortSelect {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  color: var(--text-secondary);
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

/* Task list */
.task-list { display: flex; flex-direction: column; gap: 8px; }

.task-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}

.task-wrap:hover { border-color: #303849; }

.task-item {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.task-item.completed { opacity: 0.5; }
.task-item.completed .task-text { text-decoration: line-through; }

.task-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 2px solid var(--border);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: transparent;
  transition: all 0.15s;
}

.task-checkbox:hover { border-color: var(--accent); }
.task-checkbox.checked { background: var(--success); border-color: var(--success); color: #0a0a0b; }

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

.task-text { font-size: 14px; font-weight: 500; }

.task-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 5px;
  flex-wrap: wrap;
}

.task-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
}

.badge-kerja { background: var(--accent-soft); color: var(--accent-hover); }
.badge-pribadi { background: var(--success-soft); color: var(--success); }
.badge-belajar { background: var(--warning-soft); color: var(--warning); }

.priority-dot { width: 7px; height: 7px; border-radius: 50%; }
.priority-high { background: var(--danger); }
.priority-medium { background: var(--warning); }
.priority-low { background: var(--success); }

.task-date { font-size: 11px; color: var(--text-muted); }

.task-actions { display: flex; gap: 6px; flex-shrink: 0; }

.task-action-btn {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.task-action-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.task-action-btn.delete:hover { background: var(--danger-soft); color: var(--danger); }
.task-action-btn.expand { transition: transform 0.15s, background 0.15s, color 0.15s; }
.task-action-btn.expand.open { transform: rotate(180deg); color: var(--accent-hover); }

/* Subtasks */
.subtask-panel {
  border-top: 1px solid var(--border-soft);
  padding: 10px 16px 12px 46px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-elevated);
}

.subtask-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.subtask-checkbox {
  width: 16px;
  height: 16px;
  border-radius: 5px;
  border: 2px solid var(--border);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: transparent;
  transition: all 0.15s;
}

.subtask-checkbox:hover { border-color: var(--accent); }
.subtask-checkbox.checked { background: var(--success); border-color: var(--success); color: #0a0a0b; }

.subtask-text { flex: 1; font-size: 13px; color: var(--text-secondary); }
.subtask-text.done { text-decoration: line-through; color: var(--text-muted); }

.subtask-add {
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.subtask-input {
  flex: 1;
  min-width: 120px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-primary);
  padding: 7px 10px;
  font-size: 12.5px;
  outline: none;
}

.subtask-input:focus { border-color: var(--accent); }

.subtask-link-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-secondary);
  padding: 7px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.subtask-link-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.subtask-link-btn.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-hover); }

.subtask-link-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-primary);
  padding: 7px 10px;
  font-size: 12.5px;
  outline: none;
}

.subtask-link-input:focus { border-color: var(--accent); }

/* Empty state */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state.show { display: flex; }
.empty-icon { font-size: 40px; margin-bottom: 12px; }

/* Responsive */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .add-task-card { grid-template-columns: 1fr; }
}