/* ==========================================================================
   打字练习与测试系统 —— 公共样式
   ========================================================================== */

:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --panel-2: #fafbfd;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #1e293b;
  --text-2: #475569;
  --muted: #8a97a8;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #dbeafe;
  --ok: #16a34a;
  --ok-soft: #dcfce7;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --warn: #d97706;
  --warn-soft: #fef3c7;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 16px rgba(15, 23, 42, .04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: #1e293b;
  background: #f4f6fa;
  -webkit-font-smoothing: antialiased;
}

a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; font-weight: 600; color: #1e293b; }

/* ---------- 布局 ---------- */
.page-center {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  box-shadow: 0 1px 2px rgba(15,23,42,.06), 0 4px 16px rgba(15,23,42,.04);
}

/* ---------- 表单 ---------- */
.field { margin-bottom: 16px; }
.field > label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: #475569;
  margin-bottom: 6px;
}
.field .hint { font-size: 12px; color: #94a3b8; margin-top: 4px; }

input[type="text"], input[type="password"], input[type="number"],
input[type="search"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  color: #1e293b;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
textarea { resize: vertical; min-height: 120px; line-height: 1.8; }
input:disabled, select:disabled, textarea:disabled { background: #f1f5f9; color: #94a3b8; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.4;
  color: #334155;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: #f8fafc; border-color: #94a3b8; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { color: #fff; background: #2563eb; border-color: #2563eb; }
.btn-primary:hover:not(:disabled) { background: #1d4ed8; border-color: #1d4ed8; }
.btn-danger { color: #fff; background: #dc2626; border-color: #dc2626; }
.btn-danger:hover:not(:disabled) { background: #b91c1c; border-color: #b91c1c; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover:not(:disabled) { background: #f1f5f9; }

/* ---------- 表格 ---------- */
.table-wrap {
  overflow: auto;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
table.data th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: #475569;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  white-space: nowrap;
}
table.data td {
  padding: 9px 12px;
  border-bottom: 1px solid #f1f5f9;
  color: #334155;
  vertical-align: middle;
}
table.data tbody tr:hover { background: #f8fafc; }
table.data tbody tr:last-child td { border-bottom: none; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.center, table.data th.center { text-align: center; }
/* 操作列按钮保持单行，避免因列宽不足换行导致行高抖动 */
table.data td.actions, table.data td.center:has(.btn) { white-space: nowrap; }
table.data td.actions .btn { white-space: nowrap; }
table.data td.actions .btn + .btn { margin-left: 4px; }
.empty-row { padding: 40px; text-align: center; color: #94a3b8; }

/* ---------- 标签/徽标 ---------- */
.chip {
  display: inline-block;
  padding: 2px 9px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
  background: #f1f5f9;
  color: #475569;
  white-space: nowrap;
}
.chip-primary { background: #dbeafe; color: #1d4ed8; }
.chip-ok { background: #dcfce7; color: #15803d; }
.chip-danger { background: #fee2e2; color: #b91c1c; }
.chip-warn { background: #fef3c7; color: #b45309; }
.chip-gray { background: #f1f5f9; color: #64748b; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed;
  /* 不用 inset: 0 —— 那是 Chrome 87+ 才支持的写法，
     老一点的 Chromium（如 360/QQ 浏览器的旧极速内核）会忽略，
     导致弹窗跑到页面底部看不见，表现成“点按钮没反应” */
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(15, 23, 42, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 900;
  animation: fadeIn .15s ease;
}
.modal {
  width: 100%;
  max-width: 720px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(15,23,42,.25);
  animation: popIn .18s ease;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #e2e8f0;
}
.modal-head h3 { font-size: 16px; }
.modal-body { padding: 20px; overflow: auto; }
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid #e2e8f0;
  background: #fafbfd;
  border-radius: 0 0 12px 12px;
}
.icon-btn {
  border: none;
  background: none;
  font-size: 20px;
  line-height: 1;
  color: #94a3b8;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
.icon-btn:hover { background: #f1f5f9; color: #475569; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { from { transform: scale(.97); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---------- 提示 ---------- */
.toast-wrap {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13.5px;
  color: #fff;
  background: #334155;
  box-shadow: 0 8px 24px rgba(15,23,42,.2);
  animation: slideDown .2s ease;
}
.toast.ok { background: #16a34a; }
.toast.err { background: #dc2626; }
.toast.warn { background: #d97706; }
@keyframes slideDown { from { transform: translateY(-12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.alert {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  margin-bottom: 14px;
}
.alert-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.alert-ok { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.alert-warn { background: #fef3c7; color: #b45309; border: 1px solid #fde68a; }

.muted { color: #94a3b8; }
.small { font-size: 12.5px; }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.flex { display: flex; align-items: center; gap: 8px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.spacer { flex: 1; }
.mt-16 { margin-top: 16px; }
.mb-12 { margin-bottom: 12px; }
.hidden { display: none !important; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 6px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }