/* ========== 基础变量（浅色主题） ========== */
:root {
  --bg: #f2f4f8;
  --card-bg: #ffffff;
  --text: #1f2933;
  --text-sub: #6b7280;
  --primary: #4f6ef7;
  --primary-hover: #3d5bf5;
  --danger: #ef4444;
  --success: #10b981;
  --border: #e5e7eb;
  --input-bg: #f9fafb;
  --shadow: 0 2px 10px rgba(31, 41, 51, 0.06);
  --radius: 14px;
}

html[data-theme="dark"] {
  --bg: #111722;
  --card-bg: #1b2331;
  --text: #e6e9ef;
  --text-sub: #9aa3b2;
  --primary: #6b83ff;
  --primary-hover: #8093ff;
  --border: #2a3547;
  --input-bg: #141b28;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

/* ========== 顶部栏 ========== */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.topbar-left { display: flex; align-items: center; gap: 10px; }
.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 20px;
}
.topbar h1 { font-size: 20px; font-weight: 700; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.greeting { color: var(--text-sub); font-size: 14px; }

.icon-btn {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 8px;
  width: 34px; height: 34px;
  cursor: pointer;
  font-size: 15px;
  transition: 0.2s;
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ========== 卡片 ========== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
}

/* ========== 欢迎区 ========== */
.hero {
  padding: 28px 32px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
  border: none;
  color: #fff;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
}
.hero-time { display: flex; align-items: baseline; gap: 6px; }
.hero-time #clock { font-size: 44px; font-weight: 700; font-variant-numeric: tabular-nums; }
.hero-time #seconds { font-size: 18px; opacity: 0.8; }
.hero-date { display: flex; flex-direction: column; gap: 2px; font-size: 14px; opacity: 0.9; }
.hero-motto { margin-left: auto; font-size: 14px; opacity: 0.9; }

/* ========== 网格布局 ========== */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero-motto { margin-left: 0; width: 100%; }
}

/* ========== 面板通用 ========== */
.panel { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; }
.panel-head h2 { font-size: 16px; font-weight: 700; }
.badge {
  font-size: 12px;
  color: var(--text-sub);
  background: var(--input-bg);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
}
.panel-foot { display: flex; gap: 8px; flex-wrap: wrap; }

/* ========== 按钮通用 ========== */
.link-btn {
  border: none;
  background: none;
  color: var(--text-sub);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: 0.2s;
}
.link-btn:hover { color: var(--primary); background: var(--input-bg); }
.link-btn.active { color: var(--primary); font-weight: 600; }
.link-btn.danger:hover { color: var(--danger); }

.primary-btn {
  flex: 1;
  border: none;
  background: var(--primary);
  color: #fff;
  padding: 10px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: 0.2s;
}
.primary-btn:hover { background: var(--primary-hover); }
.ghost-btn {
  border: 1px solid var(--border);
  background: none;
  color: var(--text-sub);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: 0.2s;
}
.ghost-btn:hover { color: var(--primary); border-color: var(--primary); }

/* ========== 待办清单 ========== */
.todo-form { display: flex; gap: 10px; }
.todo-form input {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  outline: none;
  transition: 0.2s;
}
.todo-form input:focus { border-color: var(--primary); }
.todo-form button {
  border: none;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  padding: 0 20px;
  font-size: 14px;
  cursor: pointer;
}
.todo-form button:hover { background: var(--primary-hover); }

.todo-list { list-style: none; display: flex; flex-direction: column; gap: 8px; max-height: 260px; overflow-y: auto; }
.todo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg);
  animation: slideIn 0.25s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.todo-item input[type="checkbox"] { width: 17px; height: 17px; accent-color: var(--primary); cursor: pointer; flex-shrink: 0; }
.todo-text { flex: 1; font-size: 14px; word-break: break-all; }
.todo-item.done .todo-text { text-decoration: line-through; color: var(--text-sub); }
.todo-del {
  border: none; background: none; color: var(--text-sub);
  cursor: pointer; font-size: 15px; padding: 2px 6px; border-radius: 6px;
}
.todo-del:hover { color: var(--danger); background: rgba(239, 68, 68, 0.1); }
.todo-empty { color: var(--text-sub); font-size: 13px; text-align: center; padding: 24px 0; }

/* ========== 番茄钟 ========== */
.pomodoro-panel { align-items: center; text-align: center; }
.pomo-time {
  font-size: 56px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
  line-height: 1;
}
.pomo-mode { display: flex; gap: 6px; }
.pomo-actions { display: flex; gap: 10px; width: 100%; }
.pomo-tip { font-size: 12px; color: var(--text-sub); }

/* ========== 快捷链接 ========== */
.links-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 12px; }
.link-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 6px;
  border-radius: 10px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  font-size: 12px;
  transition: 0.2s;
  position: relative;
  cursor: pointer;
}
.link-card:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.link-emoji {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--input-bg);
  border-radius: 10px;
  font-size: 18px;
}
.link-card .link-del {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px;
  border: none; border-radius: 50%;
  background: var(--danger); color: #fff;
  font-size: 11px; line-height: 1;
  cursor: pointer; display: none;
}
.link-card:hover .link-del { display: block; }
.links-empty { color: var(--text-sub); font-size: 13px; grid-column: 1 / -1; text-align: center; padding: 16px 0; }

/* ========== 随手记 ========== */
.notes-panel { grid-column: 1 / -1; }
.note-area {
  width: 100%;
  min-height: 160px;
  resize: vertical;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  border-radius: 10px;
  padding: 14px;
  font-size: 14px;
  font-family: inherit;
  line-height: 1.7;
  outline: none;
  transition: 0.2s;
}
.note-area:focus { border-color: var(--primary); }

/* ========== 页脚 ========== */
.footer {
  margin-top: 28px;
  text-align: center;
  color: var(--text-sub);
  font-size: 12px;
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }