/* ========== 设计令牌 ========== */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --wash: rgba(11, 11, 11, 0.04);
  --input-bg: #ffffff;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --ink-3: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --border-strong: rgba(11, 11, 11, 0.16);
  --series-1: #2a78d6;
  --accent: #256abf;
  --accent-hover: #1c5cab;
  --accent-wash: rgba(42, 120, 214, 0.10);
  --link: #256abf;
  --danger: #d03b3b;
  --danger-hover: #b83232;
  --danger-text: #c02f2f;
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-critical: #d03b3b;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.03);
  --font: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #262624;
    --wash: rgba(255, 255, 255, 0.05);
    --input-bg: #141413;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --ink-3: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --border-strong: rgba(255, 255, 255, 0.16);
    --series-1: #3987e5;
    --accent-hover: #2a78d6;
    --accent-wash: rgba(57, 135, 229, 0.16);
    --link: #86b6ef;
    --danger-text: #f07a7a;
    --shadow: none;
  }
}

/* ========== 基础 ========== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 14px/1.6 var(--font);
  color: var(--ink);
  background: var(--page);
}
body.booting .topbar, body.booting main { visibility: hidden; }
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
h1 { font-size: 22px; font-weight: 600; }
h2 { font-size: 15px; font-weight: 600; }
h3 { font-size: 16px; font-weight: 600; }
p { margin: 0 0 12px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--series-1); outline-offset: 2px; }
.icon {
  width: 16px; height: 16px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ========== 顶栏与导航 ========== */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 24px;
  height: 56px; padding: 0 24px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-size: 16px; font-weight: 600; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 8px; color: var(--ink-2); white-space: nowrap;
}
.nav a:hover { background: var(--wash); color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { background: var(--accent-wash); color: var(--link); font-weight: 600; }
.topbar-user { display: flex; align-items: center; gap: 8px; color: var(--ink-2); white-space: nowrap; }

.container { max-width: 1120px; margin: 0 auto; padding: 24px; transition: opacity 0.15s; }
.is-loading { opacity: 0.55; pointer-events: none; transition: opacity 0.15s; }

.page-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-bottom: 20px;
}
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 36px; padding: 0 14px;
  border: 1px solid var(--border-strong); border-radius: 8px;
  background: var(--surface); color: var(--ink);
  font: inherit; font-weight: 500; white-space: nowrap; cursor: pointer;
}
.btn:hover { background: var(--wash); text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); border-color: var(--danger-hover); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-sm { height: 30px; padding: 0 10px; font-size: 13px; }
.btn-block { width: 100%; height: 42px; font-size: 15px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 32px; height: 32px;
  border: 0; border-radius: 8px; background: transparent; color: var(--ink-2); cursor: pointer;
}
.icon-btn:hover { background: var(--wash); color: var(--ink); }
.icon-btn-danger:hover { color: var(--danger-text); }

/* ========== 卡片与布局 ========== */
.card {
  min-width: 0; padding: 20px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card-sub { color: var(--ink-2); font-size: 13px; }
.card-link { font-size: 13px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.stack { display: grid; gap: 16px; }
.narrow { max-width: 560px; }
.hint { color: var(--ink-2); font-size: 13px; }
.empty-inline { margin: 0; color: var(--ink-2); font-size: 13px; }
.empty {
  padding: 48px 20px; text-align: center; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.empty .btn { margin-top: 4px; }
.onboarding { padding: 40px 32px; }
.onboarding h2 { font-size: 18px; margin-bottom: 8px; }
.onboarding p { color: var(--ink-2); max-width: 520px; }

/* ========== 指标卡 ========== */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.kpi {
  min-width: 0; padding: 16px 20px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.kpi-label { color: var(--ink-2); font-size: 13px; }
.kpi-value { margin: 4px 0 2px; font-size: 26px; font-weight: 600; letter-spacing: -0.01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kpi-sub { color: var(--ink-2); font-size: 12px; }

/* ========== 表单 ========== */
.field { display: grid; gap: 6px; min-width: 0; }
.field > span:first-child { color: var(--ink-2); font-size: 13px; font-weight: 500; }
input, select, textarea {
  width: 100%; min-height: 36px; padding: 7px 10px;
  font: inherit; color: var(--ink); background: var(--input-bg);
  border: 1px solid var(--border-strong); border-radius: 8px;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--series-1); outline-offset: -1px; border-color: transparent; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 16px; }
.form-stack { display: grid; gap: 14px; }
.span-2 { grid-column: 1 / -1; }
.fieldset { margin: 0; padding: 10px 14px 14px; border: 1px solid var(--border); border-radius: 8px; }
.fieldset legend { padding: 0 6px; color: var(--ink-2); font-size: 13px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip {
  height: 28px; padding: 0 10px; border: 1px solid var(--border-strong); border-radius: 999px;
  background: transparent; color: var(--ink-2); font: inherit; font-size: 12px; cursor: pointer;
}
.chip:hover { background: var(--wash); color: var(--ink); }
.form-error { margin: 0; color: var(--danger-text); font-size: 13px; }
.checkbox { display: flex; align-items: center; gap: 8px; color: var(--ink-2); cursor: pointer; }
.checkbox input { width: 16px; height: 16px; min-height: 0; margin: 0; }

/* ========== 筛选栏 ========== */
.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 14px; }
.filters select, .filters input { width: auto; }
.filters input[type="search"] { flex: 1 1 200px; }
.inline-field { display: flex; align-items: center; gap: 6px; color: var(--ink-2); font-size: 13px; }
.summary { margin: 0 0 12px; color: var(--ink-2); }
.summary strong { color: var(--ink); font-weight: 600; }

/* ========== 表格 ========== */
.table-wrap {
  overflow-x: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--grid); }
.table th { background: var(--surface-2); color: var(--ink-2); font-size: 12px; font-weight: 500; white-space: nowrap; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: var(--wash); }
.num { text-align: right !important; font-variant-numeric: tabular-nums; white-space: nowrap; }
.nowrap { white-space: nowrap; }
.cell-main { min-width: 200px; }
.cell-title { font-weight: 500; }
.cell-sub { margin-top: 2px; color: var(--ink-2); font-size: 12px; white-space: pre-line; }
.row-actions { width: 1%; padding: 6px 8px !important; text-align: right; vertical-align: middle !important; white-space: nowrap; }
.tag {
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  background: var(--surface-2); color: var(--ink-2); font-size: 12px; white-space: nowrap;
}
.load-more { display: flex; justify-content: center; margin-top: 16px; }

/* ========== 提醒 / 最近记录 ========== */
.reminders, .recent { margin: 0; padding: 0; list-style: none; }
.reminder, .recent li { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--grid); }
.reminder:first-child, .recent li:first-child { padding-top: 0; border-top: 0; }
.reminder-main, .recent-main { flex: 1; min-width: 0; }
.reminder-title, .recent-title { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reminder-sub, .recent-sub { color: var(--ink-2); font-size: 12px; }
.recent-cost { font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* 状态徽标: 状态色只给图标和底色,文字始终用正文墨色 */
.status {
  display: inline-flex; align-items: center; gap: 4px; flex: none;
  padding: 2px 8px 2px 6px; border-radius: 999px;
  background: var(--surface-2); color: var(--ink); font-size: 12px; font-weight: 500; white-space: nowrap;
}
.status .icon { width: 14px; height: 14px; }
.reminder .status { min-width: 84px; }
.status-overdue { background: rgba(208, 59, 59, 0.12); }
.status-overdue .icon { color: var(--status-critical); }
.status-soon { background: rgba(250, 178, 25, 0.18); }
.status-soon .icon { color: var(--status-warning); }
.status-ok .icon { color: var(--status-good); }

/* ========== 车辆 ========== */
.vehicle-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.vehicle-card { display: flex; flex-direction: column; gap: 12px; }
.vehicle-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.vehicle-model { margin: -6px 0 0; color: var(--ink-2); font-size: 13px; }
.plate {
  padding: 1px 8px; border-radius: 4px;
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 600; letter-spacing: 0.05em; white-space: nowrap;
}
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 16px; margin: 0; }
.stats dt { color: var(--ink-2); font-size: 12px; }
.stats dd { margin: 0; font-weight: 500; }
.card-actions { display: flex; align-items: center; gap: 6px; margin-top: auto; padding-top: 12px; border-top: 1px solid var(--grid); }
.card-actions .spacer { flex: 1; }

/* ========== 对话框 ========== */
dialog {
  width: min(640px, calc(100vw - 32px)); max-height: calc(100vh - 48px); padding: 0;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.4); }
.dialog-form { display: flex; flex-direction: column; max-height: calc(100vh - 48px); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px 14px 20px; border-bottom: 1px solid var(--grid); }
.dialog-head h2 { font-size: 16px; }
.dialog-body { padding: 20px; overflow-y: auto; }
.dialog-foot { display: flex; align-items: center; justify-content: flex-end; gap: 8px; padding: 12px 20px; border-top: 1px solid var(--grid); }
.dialog-foot .form-error { flex: 1; }
.confirm-text { margin: 0; }

/* ========== 提示条 ========== */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 100; transform: translateX(-50%);
  max-width: calc(100vw - 32px); padding: 10px 16px; border-radius: 8px;
  background: var(--ink); color: var(--page); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.toast[data-type="error"] { background: var(--danger); color: #fff; }

/* ========== 图表: 柱状图 ========== */
.colchart { padding-top: 22px; }
.colchart-plot { position: relative; height: 180px; margin-left: 48px; }
.colchart-grid { position: absolute; left: 0; right: 0; height: 0; border-top: 1px solid var(--grid); }
.colchart-grid.is-baseline { border-top-color: var(--baseline); }
.colchart-tick {
  position: absolute; right: calc(100% + 8px); top: 0; transform: translateY(-50%);
  color: var(--ink-3); font-size: 11px; font-variant-numeric: tabular-nums; white-space: nowrap;
}
.colchart-cols { position: absolute; inset: 0; display: flex; }
.colchart-slot { display: flex; flex: 1; align-items: flex-end; justify-content: center; height: 100%; border-radius: 4px 4px 0 0; }
.colchart-slot:focus-visible { outline-offset: 0; }
.colchart-slot.is-active { background: var(--wash); }
.colchart-bar { position: relative; width: min(24px, 60%); background: var(--series-1); border-radius: 4px 4px 0 0; }
.colchart-slot.is-active .colchart-bar { filter: brightness(1.15); }
.colchart-label {
  position: absolute; bottom: calc(100% + 4px); left: 50%; transform: translateX(-50%);
  color: var(--ink); font-size: 12px; font-weight: 600; white-space: nowrap;
}
.colchart-x { display: flex; margin: 6px 0 0 48px; }
.colchart-x span { flex: 1; color: var(--ink-3); font-size: 11px; text-align: center; white-space: nowrap; }

.chart-tooltip {
  position: fixed; z-index: 50; display: grid; gap: 2px; padding: 8px 10px; pointer-events: none;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12); color: var(--ink-2); font-size: 12px;
}
.chart-tooltip strong { color: var(--ink); font-size: 14px; }

.table-view { margin-top: 12px; font-size: 13px; }
.table-view summary { width: fit-content; color: var(--link); cursor: pointer; }
.mini-table { width: 100%; margin-top: 8px; border-collapse: collapse; }
.mini-table th, .mini-table td { padding: 4px 8px; text-align: left; border-bottom: 1px solid var(--grid); }
.mini-table th { color: var(--ink-2); font-weight: 500; }

/* ========== 图表: 横向条形 ========== */
.hbars { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.hbar { display: grid; grid-template-columns: 3em minmax(0, 1fr) auto 3.5em; align-items: center; gap: 12px; }
.hbar-track { height: 12px; }
.hbar-fill { display: block; height: 100%; background: var(--series-1); border-radius: 0 4px 4px 0; }
.hbar-value { font-weight: 500; font-variant-numeric: tabular-nums; text-align: right; }
.hbar-count { color: var(--ink-2); font-size: 12px; font-variant-numeric: tabular-nums; text-align: right; }

/* ========== 登录页 ========== */
.auth-page {
  display: grid; place-items: center; min-height: 100vh; padding: 24px;
  background: radial-gradient(circle at 15% 0%, var(--accent-wash), transparent 55%), var(--page);
}
.auth-card {
  width: min(400px, 100%); padding: 32px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
}
.auth-brand { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.auth-brand h1 { font-size: 20px; }
.auth-brand p { margin: 2px 0 0; color: var(--ink-2); font-size: 13px; }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 20px; padding: 4px; border-radius: 10px; background: var(--surface-2); }
.auth-tabs button {
  height: 34px; border: 0; border-radius: 7px;
  background: transparent; color: var(--ink-2); font: inherit; cursor: pointer;
}
.auth-tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); }
#auth-form { display: grid; gap: 16px; }
.notice { margin: 0 0 16px; padding: 10px 12px; border-radius: 8px; background: var(--accent-wash); font-size: 13px; }
.password-wrap { position: relative; display: block; }
.password-wrap input { padding-right: 56px; }
.password-toggle {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  height: 28px; padding: 0 10px; border: 0; border-radius: 6px;
  background: transparent; color: var(--ink-2); font: inherit; font-size: 12px; cursor: pointer;
}
.password-toggle:hover { background: var(--wash); }

/* ========== 响应式 ========== */
@media (max-width: 960px) {
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .topbar { gap: 12px; padding: 0 16px; }
  .topbar-user { margin-left: auto; }
  #username { display: none; }
  .nav {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    justify-content: space-around; gap: 0;
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    background: var(--surface); border-top: 1px solid var(--border);
  }
  .nav a { flex-direction: column; gap: 2px; padding: 4px 12px; font-size: 11px; }
  .nav a .icon { width: 20px; height: 20px; }
  .nav a[aria-current="page"] { background: transparent; }
  .container { padding: 16px 16px calc(84px + env(safe-area-inset-bottom)); }
  .toast { bottom: calc(80px + env(safe-area-inset-bottom)); }
  .kpi { padding: 12px 14px; }
  .kpi-value { font-size: 22px; }
  .card { padding: 16px; }
  .form-grid { grid-template-columns: minmax(0, 1fr); }
  .filters select, .filters .inline-field { flex: 1 1 140px; }
  .inline-field input { flex: 1; }

  /* 记录表格在手机上变成卡片 */
  .table-wrap { overflow: visible; background: transparent; border: 0; box-shadow: none; }
  .records-table thead { display: none; }
  .records-table, .records-table tbody { display: block; }
  .records-table tr {
    position: relative; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px;
    margin-bottom: 10px; padding: 14px 16px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  }
  .records-table tbody tr:hover { background: var(--surface); }
  .records-table td { padding: 0; border: 0; font-size: 13px; }
  .records-table td[data-label]::before { content: attr(data-label); margin-right: 6px; color: var(--ink-2); font-size: 12px; }
  .records-table td[data-label="类别"]::before { content: none; }
  .records-table td.cell-main { order: -1; flex: 1 0 100%; min-width: 0; padding-right: 72px; font-size: 14px; }
  .records-table td.cell-main::before { content: none; }
  .records-table td.num { text-align: left !important; }
  .records-table td.row-actions { position: absolute; top: 8px; right: 8px; width: auto; padding: 0 !important; }

  .auth-card { padding: 24px; }
}

@media (max-width: 480px) {
  .kpis { gap: 10px; }
  .colchart-plot, .colchart-x { margin-left: 40px; }
  .colchart-x span:nth-child(even) { visibility: hidden; }
  .brand span { display: none; }
}