/* 待办事项管理系统 —— 简洁现代风格 */

:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #ef4444;
  --done: #10b981;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.app { max-width: 680px; margin: 40px auto; padding: 0 20px; }

.app-header h1 { font-size: 28px; }
.app-header .subtitle { color: var(--muted); font-size: 14px; margin-top: 2px; }

/* ============ 新增任务 ============ */
.add-form { margin: 20px 0 16px; }
.add-main { display: flex; gap: 10px; }
.add-main input {
  flex: 1; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 15px; outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.add-main input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12); }
.add-btn {
  padding: 12px 20px; border: none; border-radius: var(--radius);
  background: var(--primary); color: #fff; font-size: 15px; cursor: pointer;
}
.add-btn:hover { background: var(--primary-hover); }

.toggle-more {
  margin-top: 8px; border: none; background: none; color: var(--primary);
  font-size: 13px; cursor: pointer; padding: 2px 0;
}
.date-hint { margin-top: 6px; font-size: 13px; color: var(--done); }

/* 批量按钮 */
.batch-toggle {
  padding: 7px 14px; border: 1px solid var(--border); background: var(--card);
  border-radius: 999px; cursor: pointer; font-size: 13px; color: var(--muted);
}
.batch-toggle.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 批量操作栏 */
.batch-bar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 14px; margin: 0 0 10px;
  box-shadow: var(--shadow);
}
.batch-count { color: var(--muted); font-size: 13px; margin-right: auto; }
.batch-btn {
  padding: 6px 12px; border: 1px solid var(--border); background: #fff;
  border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text);
}
.batch-btn:hover { border-color: var(--primary); }
.batch-btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.batch-btn.primary:hover { background: var(--primary-hover); }
.batch-btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }

/* 批量选择框 */
.select-box { position: relative; display: inline-flex; cursor: pointer; margin-top: 2px; }
.select-box input { position: absolute; opacity: 0; width: 100%; height: 100%; cursor: pointer; z-index: 1; }
.box-mark {
  width: 20px; height: 20px; border: 2px solid var(--border); border-radius: 6px;
  display: inline-block; position: relative; transition: background 0.15s, border-color 0.15s;
}
.select-box input:checked + .box-mark { background: var(--primary); border-color: var(--primary); }
.select-box input:checked + .box-mark::after {
  content: ''; position: absolute; left: 6px; top: 2px;
  width: 4px; height: 9px; border: solid #fff;
  border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.task-item.selected { border-color: var(--primary); background: #f8faff; }

/* 过渡动效 */
.task-item.enter { animation: fadeInUp 0.25s ease; }
.task-item.removing {
  animation: fadeOut 0.2s ease forwards;
  pointer-events: none;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeOut {
  to { opacity: 0; transform: translateX(24px); }
}

/* 完成动效：一条线划去任务 → 翻页消失
   （划线作用于单行标题；多行标题会近似为只划首行） */
.task-item.completing {
  animation: pageTurn 0.3s ease 0.3s forwards;
  pointer-events: none;
  transform-origin: center bottom;
}
.task-item.completing .task-title {
  position: relative;
  color: var(--muted);
}
.task-item.completing .task-title::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 2px;
  background: var(--muted);
  animation: strike 0.3s ease forwards;
}
@keyframes strike {
  to { width: 100%; }
}
@keyframes pageTurn {
  0% { opacity: 1; transform: perspective(600px) rotateX(0deg); }
  100% { opacity: 0; transform: perspective(600px) rotateX(-90deg); }
}
.add-more { margin-top: 10px; padding: 12px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.add-more textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; resize: vertical; outline: none; font-family: inherit;
}
.add-more textarea:focus { border-color: var(--primary); }
.add-row { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.add-row select, .add-row input {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px; outline: none; flex: 1; min-width: 120px;
}
.add-row select:focus, .add-row input:focus { border-color: var(--primary); }

/* ============ 工具栏 ============ */
.toolbar {
  display: flex; justify-content: space-between; gap: 12px;
  align-items: center; flex-wrap: wrap;
}
.filters { display: flex; gap: 6px; }
.filter-btn {
  padding: 7px 14px; border: 1px solid var(--border); background: var(--card);
  border-radius: 999px; cursor: pointer; font-size: 13px; color: var(--muted);
}
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.controls select, .controls > input {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 13px; outline: none; background: var(--card);
}
.controls select:focus, .controls > input:focus { border-color: var(--primary); }
.view-toggle { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.view-btn {
  padding: 7px 14px; border: none; background: var(--card); cursor: pointer;
  font-size: 13px; color: var(--muted);
}
.view-btn.active { background: var(--primary); color: #fff; }

.meta { color: var(--muted); font-size: 13px; margin: 14px 0 8px; }

/* ============ 任务列表 ============ */
.task-list { list-style: none; }
.task-item {
  display: flex; align-items: flex-start; gap: 12px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.task-item.done .task-title { text-decoration: line-through; color: var(--muted); }

/* 复选框 */
.checkbox { position: relative; display: inline-flex; cursor: pointer; margin-top: 2px; }
.checkbox input { position: absolute; opacity: 0; width: 100%; height: 100%; cursor: pointer; z-index: 1; }
.checkmark {
  width: 20px; height: 20px; border: 2px solid var(--border);
  border-radius: 50%; display: inline-block; position: relative;
  transition: background 0.15s, border-color 0.15s;
}
.checkbox input:checked + .checkmark { background: var(--done); border-color: var(--done); }
.checkbox input:checked + .checkmark::after {
  content: ''; position: absolute; left: 5px; top: 2px;
  width: 5px; height: 9px; border: solid #fff;
  border-width: 0 2px 2px 0; transform: rotate(45deg);
}

.task-body { flex: 1; min-width: 0; }
.task-title-row { display: flex; align-items: center; gap: 8px; }
.task-title { font-size: 15px; word-break: break-word; }
.task-desc { color: var(--muted); font-size: 13px; margin-top: 2px; word-break: break-word; }
.task-tags { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }

/* 徽章 */
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 6px;
  font-size: 12px; line-height: 1.5; white-space: nowrap;
}
.priority-high { background: #fef2f2; color: #dc2626; }
.priority-medium { background: #fffbeb; color: #d97706; }
.priority-low { background: #f1f5f9; color: #64748b; }
.category { background: #eef2ff; color: var(--primary); }
.daily { background: #ecfdf5; color: #059669; }
.due-overdue { background: #fef2f2; color: #dc2626; font-weight: 600; }
.due-today { background: #fff7ed; color: #ea580c; font-weight: 600; }
.due-soon { background: #fefce8; color: #ca8a04; }
.due-future { background: #f1f5f9; color: #64748b; }

/* 分组视图 */
.group-header {
  list-style: none; margin: 18px 0 8px; font-size: 14px; font-weight: 600;
  color: var(--text); display: flex; align-items: center; gap: 8px;
}
.group-count { color: var(--muted); font-weight: normal; font-size: 12px; }

/* 操作按钮 */
.actions { display: flex; gap: 4px; opacity: 0; transition: opacity 0.15s; }
.task-item:hover .actions,
.task-item.editing .actions { opacity: 1; }
.btn-edit, .btn-delete, .btn-save, .btn-cancel {
  border: none; background: transparent; cursor: pointer;
  font-size: 13px; padding: 4px 8px; border-radius: 6px;
}
.btn-edit { color: var(--primary); }
.btn-edit:hover { background: rgba(79, 70, 229, 0.1); }
.btn-delete { color: var(--danger); }
.btn-delete:hover { background: rgba(239, 68, 68, 0.1); }
.btn-save { color: var(--done); }
.btn-save:hover { background: rgba(16, 185, 129, 0.1); }
.btn-cancel { color: var(--muted); }
.btn-cancel:hover { background: rgba(107, 114, 128, 0.1); }

/* 编辑态 */
.task-item.editing { flex-direction: column; }
.edit-form { width: 100%; display: flex; flex-direction: column; gap: 8px; }
.edit-title {
  padding: 8px 10px; border: 1px solid var(--primary); border-radius: 8px;
  font-size: 15px; outline: none; width: 100%;
}
.edit-desc {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; resize: vertical; outline: none; font-family: inherit; width: 100%;
}
.edit-desc:focus { border-color: var(--primary); }
.edit-row { display: flex; gap: 8px; flex-wrap: wrap; }
.edit-row select, .edit-row input {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px; outline: none; flex: 1; min-width: 120px;
}
.edit-row select:focus, .edit-row input:focus { border-color: var(--primary); }
.edit-daily {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--muted); cursor: pointer;
}
.edit-daily input { cursor: pointer; }
.task-item.editing .actions { justify-content: flex-end; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; }

/* ============ 登录 / 用户区 ============ */
.auth-bar { margin: 16px 0 4px; }
.auth-login { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.auth-login input {
  flex: 1; min-width: 140px; padding: 9px 12px;
  border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none;
}
.auth-login input:focus { border-color: var(--primary); }
.auth-btn {
  padding: 9px 16px; border: 1px solid var(--border); background: var(--card);
  border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--text);
}
.auth-btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.auth-btn.primary:hover { background: var(--primary-hover); }
.auth-btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.auth-btn-danger:hover { background: var(--danger); color: #fff; }
.auth-msg { flex: 1 1 100%; font-size: 13px; color: var(--danger); }
.auth-user {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
}
.auth-user #auth-user-email { color: var(--muted); }

/* ============ 每日提醒设置 ============ */
.reminder-bar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 14px; margin: 12px 0 4px;
  box-shadow: var(--shadow); font-size: 13px; color: var(--text);
}
.reminder-title { font-weight: 600; }
.reminder-bar label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.reminder-bar input[type="checkbox"] { cursor: pointer; }
.reminder-bar input[type="time"] {
  padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px; outline: none; font-family: inherit;
}
.reminder-bar input[type="time"]:focus { border-color: var(--primary); }

/* ============ 响应式适配 ============ */

/* 触屏设备（无 hover 指针）：编辑/删除按钮常显，并加大触控区域。
   桌面（有 hover）仍保持悬停才显示，不受影响。 */
@media (hover: none) {
  .actions { opacity: 1; }
  .btn-edit, .btn-delete { padding: 8px 10px; }
}

/* 手机窄屏（<=640px） */
@media (max-width: 640px) {
  .app { margin: 20px auto; padding: 0 12px; }
  .app-header h1 { font-size: 24px; }

  /* 新增表单：收紧间距，输入框 + 按钮保持同行 */
  .add-main { gap: 8px; }
  .add-main input { padding: 12px; }
  .add-btn { padding: 12px 16px; }

  /* 工具栏：筛选 + 批量按钮在第一行，排序/视图/搜索换行 */
  .toolbar { gap: 8px; }
  .filters { order: 1; flex: 1 1 auto; }
  .filter-btn { flex: 1; text-align: center; padding: 8px 6px; }
  .batch-toggle { order: 2; flex: 0 0 auto; }
  .controls { order: 3; flex: 1 1 100%; }
  .controls select { flex: 1 1 140px; }
  .view-toggle { flex: 0 0 auto; }
  .controls > input { flex: 1 1 100%; }   /* 搜索框独占一行全宽 */

  /* 任务项收紧，给常显的按钮腾出空间 */
  .task-item { gap: 10px; padding: 12px; }

  /* 批量操作栏：收紧内边距 */
  .batch-bar { padding: 10px 12px; }
}