/* ==========================================================================
   PlanDesk —— 样式表
   支持浅色 / 暗色两套主题，三栏看板，无外部依赖

   主题通过 <html data-theme="dark"> 切换，所有颜色都走 CSS 变量，
   切换时只是变量值变了，没有任何重排。
   ========================================================================== */

:root {
  color-scheme: light;

  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #fafbfc;
  --surface-3: #f2f4f7;
  --border: #e6e8ec;
  --border-strong: #d7dbe2;

  --text: #171a20;
  --text-2: #5b6472;
  --text-3: #8d95a3;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-weak: #eef0fe;
  --accent-muted: #7c7ff0;
  --accent-border: #e3e5fb;
  --on-accent: #ffffff;

  --todo: #3b82f6;
  --doing: #f59e0b;
  --done: #10b981;
  --danger: #ef4444;
  --danger-weak: #fef2f2;
  --danger-text: #b91c1c;
  --danger-border: #fecaca;
  --warn-weak: #fffbeb;
  --warn-text: #b45309;

  --toast-bg: #1f2430;
  --toast-text: #ffffff;
  --overlay: rgba(23, 26, 32, .38);
  --topbar-bg: rgba(255, 255, 255, .88);

  --auth-glow-1: #e8eaff;
  --auth-glow-2: #e6f7f1;
  --brand-grad: linear-gradient(160deg, #f7f8ff 0%, #f2f4ff 55%, #eef7f4 100%);
  --brand-chip-bg: rgba(255, 255, 255, .85);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;

  --shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow-sm: 0 2px 6px rgba(16, 24, 40, .06);
  --shadow: 0 6px 18px rgba(16, 24, 40, .07);
  --shadow-lg: 0 24px 60px rgba(16, 24, 40, .16);
}

/* ------------------------------- 暗色主题 ------------------------------- */

[data-theme="dark"] {
  color-scheme: dark;

  --bg: #14161b;
  --surface: #1d2027;
  --surface-2: #23262f;
  --surface-3: #2b2f39;
  --border: #2f343f;
  --border-strong: #404653;

  --text: #e9ebef;
  --text-2: #a6adb9;
  --text-3: #767e8c;

  --accent: #6f74f0;
  --accent-hover: #8388f5;
  --accent-weak: rgba(111, 116, 240, .16);
  --accent-muted: #9ba0f7;
  --accent-border: rgba(111, 116, 240, .28);
  --on-accent: #ffffff;

  --todo: #5b9dfb;
  --doing: #f0a83c;
  --done: #34c48a;
  --danger: #f2685f;
  --danger-weak: rgba(242, 104, 95, .15);
  --danger-text: #f79d96;
  --danger-border: rgba(242, 104, 95, .34);
  --warn-weak: rgba(240, 168, 60, .15);
  --warn-text: #f0c274;

  --toast-bg: #e9ebef;
  --toast-text: #171a20;
  --overlay: rgba(4, 6, 10, .62);
  --topbar-bg: rgba(20, 22, 27, .86);

  --auth-glow-1: rgba(90, 96, 220, .20);
  --auth-glow-2: rgba(52, 196, 138, .13);
  --brand-grad: linear-gradient(160deg, #1f2330 0%, #232a3d 55%, #1e2a2c 100%);
  --brand-chip-bg: rgba(255, 255, 255, .07);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, .45);
  --shadow: 0 8px 22px rgba(0, 0, 0, .5);
  --shadow-lg: 0 26px 64px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--text-2);
}

.hidden { display: none !important; }

/* ------------------------------- 通用控件 ------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s, transform .06s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-xs); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text-2); }
.btn-ghost:hover { border-color: var(--border-strong); color: var(--text); background: var(--surface-2); }

.btn-sm { height: 32px; padding: 0 12px; font-size: 13px; }
.btn-block { width: 100%; height: 44px; font-size: 14.5px; }

.link-btn {
  color: var(--accent);
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 4px;
  transition: background .15s;
}
.link-btn:hover { background: var(--accent-weak); }

.field { display: block; margin-bottom: 14px; }
.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 6px;
}
.field-label .opt { color: var(--text-3); font-weight: 400; font-size: 12px; }
.field input {
  width: 100%;
  height: 42px;
  padding: 0 13px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.form-error {
  margin: 0 0 12px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--danger-weak);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
  font-size: 13px;
}

/* ================================ 登录页 ================================ */

.auth-shell {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(1100px 620px at 10% -12%, var(--auth-glow-1) 0%, transparent 60%),
    radial-gradient(900px 560px at 108% 108%, var(--auth-glow-2) 0%, transparent 56%),
    var(--bg);
}

/* 登录页右上角的主题 / 语言切换（和主应用顶栏共用一套逻辑与样式） */
.auth-controls {
  position: absolute;
  top: 22px;
  right: 26px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.auth-controls .icon-toggle {
  background: var(--surface);
  border-color: var(--border);
  box-shadow: var(--shadow-xs);
}

.auth-card {
  display: grid;
  grid-template-columns: 1.08fr 1fr;
  width: 100%;
  max-width: 1020px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.auth-brand {
  display: flex;
  flex-direction: column;
  padding: 56px 52px 44px;
  background: var(--brand-grad);
  border-right: 1px solid var(--border);
}
.brand-mark {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent);
  border-radius: 16px;
  font-size: 27px; font-weight: 700;
  box-shadow: 0 10px 26px rgba(79, 70, 229, .32);
}
.auth-brand h1 { margin: 26px 0 0; font-size: 33px; letter-spacing: -.6px; }
.brand-sub { margin: 6px 0 0; color: var(--text-2); font-size: 15px; }

/* 注意：只有第一个 span（图标位）是 30px 的小方块；
   后面包文案的 span 千万别一起限制宽高，否则英文一换行就碎掉 */
.brand-points { list-style: none; margin: 32px 0 0; padding: 26px 0 0; border-top: 1px solid var(--border); display: grid; gap: 16px; }
.brand-points li {
  display: flex; gap: 13px; align-items: flex-start;
  font-size: 14px; line-height: 1.6; color: var(--text-2);
}
.brand-points li span:first-child {
  flex: none;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--brand-chip-bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: 13px;
  color: var(--accent);
}

.brand-foot {
  margin-top: auto;
  padding-top: 34px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text-3);
}

.auth-form-wrap { padding: 52px 48px; display: flex; flex-direction: column; }

.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-3);
  padding: 4px;
  border-radius: 11px;
  margin-bottom: 30px;
}
.tab {
  flex: 1;
  height: 38px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
  transition: background .15s, color .15s, box-shadow .15s;
}
.tab.is-active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-xs); }

.demo-hint {
  margin-top: auto;
  padding-top: 22px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-3);
}

/* ================================ 顶栏 ================================ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 60px;
  padding: 8px 26px;
  background: var(--topbar-bg);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-left { display: flex; align-items: center; gap: 11px; flex: none; }
.logo {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent);
  border-radius: 9px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .28);
}
.logo-text { display: flex; align-items: baseline; gap: 7px; }
.logo-text strong { font-size: 16px; letter-spacing: -.2px; }
.logo-text span { font-size: 12px; color: var(--text-3); }

.topbar-right { display: flex; align-items: center; gap: 6px; flex: none; }

/* ---------------------- 主题 / 语言 切换按钮 ---------------------- */

.icon-toggle {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  color: var(--text-2);
  border: 1px solid transparent;
  transition: background .15s, color .15s, border-color .15s;
}
.icon-toggle:hover { background: var(--surface-3); color: var(--text); }
.icon-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
/* display:block 去掉 inline svg 在 span 里多出来的基线下沉空间，
   否则图标会比旁边文字按钮（如「中 / EN」）高约 3px，看着不齐 */
.icon-toggle svg { width: 17px; height: 17px; display: block; }
/* 语言按钮显示文字（中 / EN），所以宽度自适应 */
.icon-toggle.lang-toggle { width: auto; min-width: 34px; padding: 0 8px; }
.lang-label { font-size: 12px; font-weight: 600; letter-spacing: .02em; }

/* ---------------------------- 头像下拉菜单 ---------------------------- */

.user-menu { position: relative; }

.avatar-btn {
  display: grid;
  place-items: center;
  padding: 2px;
  border-radius: 50%;
  transition: box-shadow .15s, background .15s;
}
.avatar-btn:hover { background: var(--surface-3); }
.avatar-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.avatar {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--accent-weak);
  color: var(--accent);
  font-size: 12px; font-weight: 600;
  text-transform: uppercase;
  user-select: none;
}

.menu-pop {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 50;
  min-width: 232px;
  padding: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  animation: menu-in .15s cubic-bezier(.2, .9, .3, 1);
}

.menu-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 11px;
  margin-bottom: 5px;
  border-bottom: 1px solid var(--border);
}
.menu-head .avatar { width: 34px; height: 34px; font-size: 14px; }
.menu-head-text { display: grid; min-width: 0; }
.menu-head-text strong {
  font-size: 13.5px; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.menu-head-text span {
  font-size: 12px; color: var(--text-3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border-radius: 7px;
  font-size: 13.5px;
  color: var(--text-2);
  text-align: left;
  transition: background .15s, color .15s;
}
.menu-item:hover { background: var(--surface-3); color: var(--text); }
.menu-item svg { width: 16px; height: 16px; flex: none; }
.menu-item.is-danger:hover { background: var(--danger-weak); color: var(--danger-text); }

@keyframes menu-in {
  from { opacity: 0; transform: translateY(-6px) scale(.98); }
  to   { opacity: 1; transform: none; }
}

/* ================================ 布局 ================================ */

.layout {
  max-width: 1600px;
  margin: 0 auto;
  padding: 22px 26px 60px;
  display: grid;
  gap: 16px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
}

/* ------------------------------ 快速录入 ------------------------------ */

.composer { padding: 18px 20px 20px; }
.composer-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.composer-head h2 { margin: 0; font-size: 15px; font-weight: 600; }
.composer-head-actions { display: flex; align-items: center; gap: 4px; }
.composer-collapse { color: var(--text-3); }
.composer-collapse:hover { color: var(--text); }

/* ------------------------- 快速录入：折叠 / 展开 ------------------------- */
/* 默认收起：整块变成一条可点击的横条，把首屏留给看板 */

.composer.is-collapsed { padding: 0; }
.composer.is-collapsed .composer-body { display: none; }
.composer:not(.is-collapsed) .composer-toggle { display: none; }

.composer-body { animation: composer-in .18s ease; }

.composer-toggle {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 56px;
  padding: 12px 20px;
  text-align: left;
  border-radius: var(--radius);
  transition: background .15s;
}
.composer-toggle:hover { background: var(--surface-2); }

.composer-toggle-icon {
  flex: none;
  width: 27px; height: 27px;
  display: grid; place-items: center;
  border: 1.5px dashed var(--border-strong);
  border-radius: 8px;
  color: var(--accent);
  font-size: 16px;
  line-height: 1;
  padding-bottom: 2px;               /* 视觉上居中「＋」 */
  transition: border-color .15s, background .15s, transform .18s;
}
.composer-toggle:hover .composer-toggle-icon {
  border-color: var(--accent);
  background: var(--accent-weak);
  transform: rotate(90deg);
}

.composer-toggle-text { font-size: 14px; font-weight: 600; flex: none; }
.composer-toggle-hint {
  flex: 1;
  min-width: 0;
  font-size: 12.5px;
  color: var(--text-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 输入到一半收起时，在折叠条上提示还有几条没提交 */
.composer-toggle-badge {
  flex: none;
  display: inline-flex; align-items: center; gap: 5px;
  height: 22px;
  padding: 0 9px;
  border-radius: 11px;
  background: var(--accent-weak);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

@keyframes composer-in {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: none; }
}

#composer-input {
  width: 100%;
  min-height: 104px;
  padding: 13px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  resize: vertical;
  line-height: 1.75;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
#composer-input::placeholder { color: var(--text-3); }
#composer-input:focus {
  outline: none;
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .1);
}

.composer-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; margin-top: 12px; flex-wrap: wrap;
}
.composer-tips { display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: center; font-size: 12px; color: var(--text-3); }
.composer-actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.kbd-hint { font-size: 12px; color: var(--text-3); }

/* ------------------------------ 解析预览 ------------------------------ */

.preview {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  overflow: hidden;
  animation: fade-in .18s ease;
}
.preview-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 13px;
  background: var(--accent-weak);
  border-bottom: 1px solid var(--accent-border);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
}
.preview-note { font-weight: 400; color: var(--accent-muted); }

.preview-list { list-style: none; margin: 0; padding: 6px; display: grid; gap: 2px; max-height: 260px; overflow-y: auto; }
.preview-list li {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 9px;
  border-radius: 7px;
  font-size: 13.5px;
}
.preview-list li:hover { background: var(--surface); }
.preview-index {
  flex: none;
  width: 19px; height: 19px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--surface-3);
  color: var(--text-3);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.preview-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.preview-chips { display: flex; gap: 5px; flex: none; }

/* ------------------------------- 统计条 ------------------------------- */

.statbar {
  display: flex; align-items: center; gap: 4px;
  padding: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  overflow-x: auto;
}
.stat {
  display: flex; align-items: baseline; gap: 7px;
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  transition: background .15s;
  white-space: nowrap;
}
.stat:hover { background: var(--surface-3); }
.stat b { font-size: 16px; font-variant-numeric: tabular-nums; }
.stat span { font-size: 12.5px; color: var(--text-3); }
.stat.is-active { background: var(--accent-weak); }
.stat.is-active b, .stat.is-active span { color: var(--accent); }
.stat-warn b { color: var(--doing); }
.stat-danger b { color: var(--danger); }
.stat-sep { width: 1px; height: 20px; background: var(--border); margin: 0 6px; flex: none; }

/* --------------------------- 顶栏工具条 --------------------------- */
/* 搜索 / 排序 / 清除已完成，常驻 sticky 顶栏中间 */

.topbar-tools {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 760px;
  margin: 0 auto;
}

.search {
  flex: 1;
  min-width: 140px;
  display: flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text-3);
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.search:focus-within {
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .1);
}
.search input { flex: 1; min-width: 0; border: none; background: none; outline: none; }
.search input::-webkit-search-cancel-button { cursor: pointer; }

.topbar-tools select {
  height: 36px;
  max-width: 190px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  outline: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
  transition: border-color .15s;
}
.topbar-tools select:hover { border-color: var(--border-strong); }
.topbar-tools select:focus { border-color: var(--accent); }
.topbar-tools .btn { flex: none; }

/* ================================ 看板 ================================ */

.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.column {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  min-height: 180px;
  transition: border-color .15s, background .15s;
}
.column-head {
  display: flex; align-items: center; gap: 9px;
  padding: 13px 15px;
  border-bottom: 1px solid var(--border);
}
.column-head h3 { margin: 0; font-size: 13.5px; font-weight: 600; }
.column-head .count {
  margin-left: auto;
  min-width: 22px; height: 22px;
  display: grid; place-items: center;
  padding: 0 7px;
  border-radius: 11px;
  background: var(--surface-3);
  color: var(--text-3);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dot-todo  { background: var(--todo); }
.dot-doing { background: var(--doing); }
.dot-done  { background: var(--done); }

.column-body {
  padding: 10px;
  display: grid;
  gap: 8px;
  align-content: start;
  min-height: 120px;
}
.column-body.is-drop-target {
  background: var(--accent-weak);
  box-shadow: inset 0 0 0 2px rgba(79, 70, 229, .25);
  border-radius: 0 0 var(--radius) var(--radius);
}

.empty {
  margin: 26px 12px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
}

/* -------------------------------- 卡片 -------------------------------- */

.card {
  position: relative;
  display: flex;
  gap: 10px;
  padding: 11px 11px 11px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-xs);
  transition: border-color .15s, box-shadow .15s, transform .1s, opacity .2s;
  animation: card-in .2s ease;
}
.card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.card.is-dragging { opacity: .4; }
.card.is-done .card-title { color: var(--text-3); text-decoration: line-through; text-decoration-color: var(--text-3); }
.card::before {
  content: "";
  position: absolute; left: 0; top: 10px; bottom: 10px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
}
.card[data-priority="3"]::before { background: var(--danger); }
.card[data-priority="1"]::before { background: var(--border-strong); }

/* 快速完成的圆圈按钮 */
.check {
  flex: none;
  width: 20px; height: 20px;
  margin-top: 1px;
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  display: grid; place-items: center;
  transition: background .15s, border-color .15s, transform .1s;
  position: relative;
}
.check:hover { border-color: var(--done); transform: scale(1.12); }
.check::after {
  content: "";
  width: 9px; height: 5px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(0.5px, -1px) scale(0);
  transition: transform .16s cubic-bezier(.2, 1.4, .5, 1);
}
.card.is-done .check { background: var(--done); border-color: var(--done); }
.card.is-done .check::after { transform: rotate(-45deg) translate(0.5px, -1px) scale(1); }

.card-main { flex: 1; min-width: 0; }
.card-title { font-size: 14px; line-height: 1.5; word-break: break-word; }
.card-note {
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--text-3);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card-meta { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; }
.card-meta:empty { display: none; }

.chip {
  display: inline-flex; align-items: center; gap: 3px;
  height: 20px;
  padding: 0 7px;
  border-radius: 6px;
  background: var(--surface-3);
  color: var(--text-2);
  font-size: 11.5px;
  white-space: nowrap;
}
.chip.is-overdue { background: var(--danger-weak); color: var(--danger-text); font-weight: 500; }
.chip.is-today { background: var(--warn-weak); color: var(--warn-text); font-weight: 500; }
.chip.pri-3 { background: var(--danger-weak); color: var(--danger-text); }
.chip.pri-1 { background: var(--surface-3); color: var(--text-3); }
.chip.tag { background: var(--accent-weak); color: var(--accent); }

.card-actions {
  position: absolute;
  top: 8px; right: 8px;
  display: flex; gap: 2px;
  opacity: 0;
  transition: opacity .15s;
}
.card:hover .card-actions, .card:focus-within .card-actions { opacity: 1; }
.icon-btn {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 6px;
  color: var(--text-3);
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
.icon-btn[data-act="delete"]:hover { background: var(--danger-weak); color: var(--danger); }
.icon-btn svg { width: 15px; height: 15px; }

/* ------------------------------- 弹窗 ------------------------------- */

.overlay {
  position: fixed; inset: 0;
  z-index: 60;
  display: grid; place-items: center;
  padding: 20px;
  background: var(--overlay);
  backdrop-filter: blur(3px);
  animation: fade-in .15s ease;
}
.modal {
  width: 100%; max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--surface);
  border-radius: 15px;
  box-shadow: var(--shadow-lg);
  animation: modal-in .2s cubic-bezier(.2, .9, .3, 1);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 17px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-head h3 { margin: 0; font-size: 15px; font-weight: 600; }
.modal-body { padding: 20px; }
.modal-foot {
  display: flex; justify-content: flex-end; gap: 9px;
  padding: 15px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.raw-ref {
  margin-top: 4px;
  padding: 9px 11px;
  background: var(--surface-2);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-3);
  word-break: break-all;
}
.seg { display: flex; gap: 4px; background: var(--surface-3); padding: 4px; border-radius: 9px; }
.seg button {
  flex: 1; height: 32px; border-radius: 6px;
  font-size: 13px; color: var(--text-2);
  transition: background .15s, color .15s, box-shadow .15s;
}
.seg button.is-active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-xs); font-weight: 500; }
.seg button[data-value="3"].is-active { color: var(--danger); }
.seg button[data-value="1"].is-active { color: var(--text-3); }

/* ------------------------------- Toast ------------------------------- */

.toast-root {
  position: fixed;
  right: 22px; bottom: 22px;
  z-index: 90;
  display: grid; gap: 9px;
  justify-items: end;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 9px;
  max-width: 380px;
  padding: 11px 15px;
  background: var(--toast-bg);
  color: var(--toast-text);
  border-radius: 10px;
  font-size: 13.5px;
  box-shadow: var(--shadow-lg);
  animation: toast-in .22s cubic-bezier(.2, .9, .3, 1);
}
.toast.is-out { animation: toast-out .2s ease forwards; }
.toast.is-error { background: #d24040; color: #fff; }
.toast.is-success { background: #0f8f63; color: #fff; }
.toast-icon { flex: none; font-size: 15px; }

/* ------------------------------ 动画 ------------------------------ */

@keyframes fade-in { from { opacity: 0 } to { opacity: 1 } }
@keyframes card-in { from { opacity: 0; transform: translateY(-4px) } to { opacity: 1; transform: none } }
@keyframes modal-in { from { opacity: 0; transform: translateY(12px) scale(.98) } to { opacity: 1; transform: none } }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px) } to { opacity: 1; transform: none } }
@keyframes toast-out { to { opacity: 0; transform: translateX(14px) } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ------------------------------ 响应式 ------------------------------ */

@media (max-width: 900px) {
  /* 顶栏放不下时换成两行：第一行 logo + 用户，第二行搜索 / 排序 / 清除 */
  .topbar { flex-wrap: wrap; row-gap: 8px; }
  .topbar-tools { order: 3; flex-basis: 100%; max-width: none; }
}

@media (max-width: 1024px) {
  .board { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .auth-card { grid-template-columns: 1fr; max-width: 420px; }
  .auth-brand { display: none; }
  .auth-form-wrap { padding: 34px 26px; }
  .topbar { padding: 0 16px; }
  .layout { padding: 16px 14px 48px; }
  .kbd-hint { display: none; }
  .composer-toggle-hint { display: none; }
  /* 顶栏第二行再拆两行：搜索独占一行，排序 + 清除一行，避免被裁切 */
  .topbar-tools { flex-wrap: wrap; row-gap: 8px; }
  .topbar-tools .search { flex-basis: 100%; }
  .topbar-tools select { flex: 1; max-width: none; }
  .composer-actions { margin-left: 0; width: 100%; }
  .composer-actions .btn { flex: 1; }
  .toast-root { left: 14px; right: 14px; justify-items: stretch; }
  .toast { max-width: none; }
}