/* 管理端样式 */
* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
:root {
  --primary: #2f54eb;
  --primary-dark: #1d39c4;
  --primary-light: #eef1fe;
  --danger: #e5484d;
  --danger-dark: #c43b40;
  --ok: #30a46c;
  --bg: #f4f6fb;
  --card: #fff;
  --border: #e2e6f0;
  --text: #333;
  --muted: #888;
  --radius: 8px;
}
body { font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* ---------- 登录页 ---------- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--card); padding: 40px 36px; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,.08); width: 360px; }
.login-card h1 { font-size: 20px; }
.sub { color: var(--muted); font-size: 13px; margin: 6px 0 20px; }

/* ---------- 布局：顶栏 + 左导航 ---------- */
.topbar { background: var(--card); border-bottom: 1px solid var(--border); padding: 0 20px; height: 52px; display: flex; justify-content: space-between; align-items: center; }
.topbar .brand { font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); }
.layout { display: flex; min-height: calc(100vh - 52px); }
.sidebar { width: 180px; background: var(--card); border-right: 1px solid var(--border); padding: 12px 8px; flex-shrink: 0; }
.side-nav { display: flex; flex-direction: column; gap: 4px; position: sticky; top: 12px; }
.nav-item { text-align: left; border: 0; background: transparent; padding: 10px 14px; border-radius: var(--radius); cursor: pointer; font-size: 14px; color: var(--text); transition: background .15s, color .15s; }
.nav-item:hover { background: var(--primary-light); }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }
.content { flex: 1; padding: 20px; min-width: 0; }
.page-title { margin-bottom: 16px; font-size: 18px; }

/* ---------- 表单 ---------- */
label { display: block; margin-bottom: 14px; font-size: 13px; color: #555; }
input, select {
  width: 100%; padding: 9px 11px; margin-top: 5px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 14px; outline: none; background: var(--card); transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,84,235,.12); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }

/* ---------- 按钮体系 ---------- */
.btn, button[type="submit"] {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border: 1px solid transparent; border-radius: var(--radius);
  background: #eef1f8; color: var(--text); font-size: 14px; cursor: pointer; line-height: 1.2;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s, opacity .15s;
  white-space: nowrap;
}
.btn:hover:not(:disabled), button[type="submit"]:hover:not(:disabled) { background: #e2e7f4; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn.danger { background: var(--danger); color: #fff; }
.btn.danger:hover:not(:disabled) { background: var(--danger-dark); }
.btn.small { padding: 5px 12px; font-size: 12px; border-radius: 6px; }
.btn.ghost { background: transparent; border-color: var(--border); }
.btn.ghost:hover:not(:disabled) { background: var(--primary-light); }
.btn.block { width: 100%; }

/* ---------- 卡片 / 表格 ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row .grow { flex: 1; }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { background: #f7f9fd; color: #555; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fafbfe; }
.pager { display: flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--muted); font-size: 13px; }

/* ---------- 概览 ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; }
.stat-card { text-align: center; padding: 20px 12px; margin-bottom: 0; }
.stat-label { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.stat-value { font-size: 22px; font-weight: 700; }
.stat-value.ok { color: var(--ok); }
.stat-value.err { color: var(--danger); }
.tips { padding-left: 20px; color: #555; font-size: 13px; line-height: 1.9; }

/* ---------- 接口文档 ---------- */
.api-table td.method { font-family: monospace; font-weight: 600; }
.method-badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 600; color: #fff; min-width: 52px; text-align: center; }
.method-badge.GET { background: #30a46c; }
.method-badge.POST { background: #2f54eb; }
.method-badge.PUT { background: #e5a228; }
.method-badge.DELETE { background: #e5484d; }

/* ---------- 提示 / 弹层 ---------- */
.alert { border-radius: var(--radius); padding: 8px 12px; font-size: 13px; margin: 10px 0; }
.alert.error { background: #fdeaea; color: var(--danger); }
.toast { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); background: #333; color: #fff; padding: 10px 20px; border-radius: 6px; font-size: 13px; z-index: 100; box-shadow: 0 4px 16px rgba(0,0,0,.15); }
.toast.error { background: var(--danger); }
.modal-overlay { position: fixed; inset: 0; background: rgba(20,24,40,.45); display: flex; align-items: center; justify-content: center; z-index: 90; padding: 20px; }
.modal { background: var(--card); border-radius: 12px; width: 100%; max-width: 560px; max-height: 88vh; display: flex; flex-direction: column; box-shadow: 0 12px 40px rgba(0,0,0,.18); }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.modal-title { font-size: 16px; font-weight: 600; }
.modal-body { padding: 20px; overflow-y: auto; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.panel { max-width: 460px; margin: 40px auto; background: var(--card); padding: 32px; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,.06); }
.api-row { cursor: pointer; }
.api-row:hover { background: var(--bg); }
.api-detail-block { margin-top: 14px; }
.api-detail-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.code-block { background: #0f1220; color: #d7e3ff; border-radius: 8px; padding: 12px 14px; font-size: 12px; line-height: 1.6; overflow-x: auto; margin: 0; white-space: pre-wrap; word-break: break-all; }
.char-detail-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.char-detail-word { font-size: 34px; font-weight: 700; color: var(--primary); }
.char-detail-item { margin-bottom: 10px; }
.char-detail-item > div { font-size: 14px; }
.char-audio-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.char-words { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.char-words .badge { font-size: 12px; }

/* ---------- 笔顺动画 ---------- */
.char-strokes-block { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 14px; }
.char-strokes-stage { display: inline-block; margin-top: 8px; }
#charStrokeCanvas { background: #f5f5f5; border: 1px solid var(--border); border-radius: var(--radius); display: block; }
.char-strokes-tip { margin-top: 8px; font-size: 12px; }
.muted { color: var(--muted); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; background: #eef1f8; color: #555; }
.badge.ok { background: #e6f6ee; color: var(--ok); }

/* ---------- 计划详情汉字网格 ---------- */
.plan-char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 10px; margin-top: 8px; }
.plan-char-card { display: flex; align-items: center; justify-content: center; width: 100%; aspect-ratio: 1; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: all .15s; }
.plan-char-card:hover { border-color: var(--primary); background: var(--primary-light); box-shadow: 0 2px 8px rgba(47,84,235,.15); }
.plan-char-word { font-size: 28px; font-weight: 600; color: var(--text); }

/* ---------- 可观测 ---------- */
.obs-chart { display: flex; align-items: flex-end; gap: 1px; height: 160px; margin-top: 12px; }
.obs-chart-col { flex: 1; min-width: 2px; height: 100%; display: flex; align-items: flex-end; }
.obs-chart-total { position: relative; width: 100%; background: var(--primary); opacity: .85; border-radius: 2px 2px 0 0; }
.obs-chart-err { position: absolute; bottom: 0; left: 0; right: 0; background: var(--danger); border-radius: 0; }