/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --bg2: #181c24;
  --bg3: #1e2330;
  --border: #2a2f3e;
  --text: #e8eaf0;
  --text-muted: #7c859a;
  --accent: #6c63ff;
  --accent-hover: #7e77ff;
  --danger: #e05c6e;
  --success: #3ecf8e;
  --warning: #f0a030;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --sidebar-w: 240px;
}

html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ─── Layout ────────────────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ─── Sidebar ───────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 22px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  padding: 12px 10px;
  flex: 1;
}

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

.nav-btn:hover { background: var(--bg3); color: var(--text); }
.nav-btn.active { background: rgba(108,99,255,0.15); color: var(--accent); }

.nav-icon { font-size: 16px; width: 20px; text-align: center; }

.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 12px 4px;
}

.clients-section { padding: 4px 0; }

.clients-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 12px 8px;
}

.clients-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.client-list {
  list-style: none;
}

.client-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
  position: relative;
}

.client-item:hover { background: var(--bg3); }
.client-item.active { background: var(--bg3); }

.client-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.client-name {
  flex: 1;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.client-count {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg);
  border-radius: 10px;
  padding: 1px 6px;
}

.client-item-actions {
  display: none;
  gap: 4px;
  position: absolute;
  right: 8px;
}

.client-item:hover .client-item-actions { display: flex; }

/* ─── Main Content ──────────────────────────────────────────── */
#main-content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg);
}

.view {
  display: none;
  padding: 32px 36px;
  max-width: 900px;
}

.view.active { display: block; }

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.view-header h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

/* ─── Sort Controls ─────────────────────────────────────────── */
.sort-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sort-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-right: 2px;
}

.sort-btn {
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.sort-btn:hover { border-color: var(--accent); color: var(--text); }
.sort-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ─── Task Cards ────────────────────────────────────────────── */
.task-list-container { display: flex; flex-direction: column; gap: 12px; }

.task-group-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-top: 12px;
  margin-bottom: 4px;
  padding-left: 2px;
}

.task-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}

.task-card:hover { border-color: #3a3f52; }
.task-card.completed { opacity: 0.55; }

.task-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
}

.task-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  cursor: pointer;
  transition: all 0.15s;
  background: transparent;
}

.task-checkbox.checked {
  background: var(--success);
  border-color: var(--success);
}

.task-checkbox.checked::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.task-checkbox.partial {
  border-color: var(--warning);
}

.task-checkbox.locked {
  cursor: not-allowed;
  opacity: 0.6;
}

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

.task-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

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

.task-client-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-muted);
}

.task-client-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.due-badge {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
}

.due-overdue { background: rgba(224,92,110,0.15); color: var(--danger); }
.due-today   { background: rgba(240,160,48,0.15);  color: var(--warning); }
.due-soon    { background: rgba(108,99,255,0.15);  color: var(--accent); }
.due-future  { background: rgba(255,255,255,0.06); color: var(--text-muted); }

.task-notes-preview {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
}

.task-card:hover .task-actions { opacity: 1; }

.task-expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 0.15s;
  flex-shrink: 0;
  margin-top: 1px;
}

.task-expand-btn:hover { background: var(--bg3); color: var(--text); }

/* ─── Subtasks ──────────────────────────────────────────────── */
.task-subtasks {
  padding: 0 16px 14px 48px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.subtask-checkbox {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: all 0.15s;
  background: transparent;
}

.subtask-checkbox.checked {
  background: var(--success);
  border-color: var(--success);
}

.subtask-checkbox.checked::after {
  content: '✓';
  color: #fff;
  font-size: 10px;
  font-weight: 700;
}

.subtask-title {
  font-size: 13.5px;
  color: var(--text);
  flex: 1;
}

.subtask-item.completed .subtask-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.subtask-progress {
  font-size: 11px;
  color: var(--text-muted);
  padding: 0 16px 8px 48px;
}

/* ─── Empty State ───────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
  text-align: center;
  gap: 12px;
}

.empty-icon { font-size: 48px; }
.empty-title { font-size: 17px; font-weight: 600; color: var(--text); }
.empty-sub { font-size: 14px; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  gap: 6px;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--bg3);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-secondary:hover { color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); }

.btn-small {
  padding: 4px 10px;
  font-size: 12px;
  background: var(--bg3);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-small:hover { color: var(--text); }

.icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.15s;
  line-height: 1;
}
.icon-btn:hover { background: var(--bg3); color: var(--text); }

.icon-btn-sm {
  font-size: 13px;
  width: 22px;
  height: 22px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.icon-btn-sm:hover { background: var(--bg3); color: var(--text); }

/* ─── Modals ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: 420px;
  max-width: calc(100vw - 40px);
  box-shadow: var(--shadow);
  animation: modal-in 0.18s ease;
}

.modal-wide { width: 520px; }
.modal-small { width: 340px; }

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 16px; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: all 0.15s;
}
.modal-close:hover { color: var(--text); background: var(--bg3); }

.modal-body { padding: 20px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* ─── Forms ─────────────────────────────────────────────────── */
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  padding: 9px 12px;
  outline: none;
  font-family: var(--font);
  transition: border-color 0.15s;
}

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

.form-textarea {
  resize: vertical;
  min-height: 70px;
}

input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator {
  filter: invert(0.7);
  cursor: pointer;
}

.date-time-row {
  display: flex;
  gap: 8px;
}

.date-time-row #task-due-input  { flex: 1.4; }
.date-time-row #task-time-input { flex: 1; }

/* ─── Color Picker ──────────────────────────────────────────── */
.color-picker {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: transform 0.15s, border-color 0.15s;
}

.color-swatch:hover { transform: scale(1.15); }
.color-swatch.selected { border-color: var(--text); }

/* ─── Subtask Input List ─────────────────────────────────────── */
.subtasks-section { margin-top: 16px; }

.subtasks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.subtask-input-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.subtask-input-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.subtask-input-item input {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  padding: 7px 10px;
  outline: none;
  font-family: var(--font);
  transition: border-color 0.15s;
}

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

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #3a3f52; }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
  :root { --sidebar-w: 200px; }
  .view { padding: 20px 16px; }
  .view-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}