/* ===== 江滨实验小学三年级学生学习网 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  background: #eef3fb;
  color: #333;
  font-size: 14px;
  line-height: 1.6;
}

.page { max-width: 1080px; margin: 0 auto; padding: 14px; }

/* 顶部标题与说明 */
.site-title {
  text-align: center;
  font-size: 26px;
  color: #1a4b9c;
  letter-spacing: 2px;
  margin: 8px 0 10px;
}

.notice {
  border: 1px solid #b9b9b9;
  background: #ffffe8;
  padding: 8px 12px;
  font-size: 13px;
  color: #444;
  margin-bottom: 12px;
}

/* 三栏布局 */
.columns {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) 330px;
  gap: 10px;
  align-items: start;
}

.panel { border: 1px solid #b0b0b0; background: #fff; }
.panel-title {
  background: #d6e4ff;
  color: #123f8a;
  font-weight: bold;
  padding: 6px 12px;
  border-bottom: 1px solid #b0b0b0;
}

/* 左栏：常用网站 */
.sitelist { list-style: none; padding: 8px 12px; }
.sitelist li { margin: 6px 0; }
.sitelist a { color: #0055cc; text-decoration: none; }
.sitelist a:hover { text-decoration: underline; }

/* 中栏：登录表单 */
.login-form { padding: 10px 12px 12px; }
.form-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
  flex-wrap: wrap;
}
.form-row label { width: 64px; text-align: right; flex: 0 0 auto; }
.form-row select,
.form-row input[type="password"] {
  flex: 1 1 160px;
  min-width: 120px;
  padding: 5px 8px;
  font-size: 16px;
  border: 1px solid #999;
  background: #fff;
}
.show-pw {
  width: auto !important;
  text-align: left !important;
  font-size: 13px;
  color: #555;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  user-select: none;
}
.show-pw input { width: auto; }

.btn {
  padding: 5px 18px;
  font-size: 14px;
  border: 1px solid #888;
  background: linear-gradient(#fdfdfd, #e2e2e2);
  cursor: pointer;
  min-height: 32px;
}
.btn:hover { background: linear-gradient(#fff, #d6d6d6); }
.btn:active { background: #ccc; }

.msg { min-height: 20px; color: #c00; font-size: 13px; margin-top: 4px; }
.msg.ok { color: #0a7a1f; }

/* 文件列表 */
.filebox {
  height: 220px;
  overflow-y: auto;
  border-top: 1px solid #ddd;
  background: #fbfbfb;
}
.file-empty { color: #999; text-align: center; padding: 24px 0; }
.file-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-bottom: 1px dashed #e3e3e3;
  cursor: pointer;
}
.file-row:hover { background: #f0f5ff; }
.file-row input[type="checkbox"] {
  width: 16px; height: 16px;
  flex: 0 0 auto;
  cursor: pointer;
}
.file-row .fname {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-row .fsize { flex: 0 0 auto; color: #888; font-size: 12px; }

.btn-row { padding: 8px 10px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hint { color: #999; font-size: 12px; }
.quota {
  padding: 4px 12px;
  font-size: 13px;
  color: #555;
  background: #f6f9ff;
  border-bottom: 1px solid #e3e3e3;
}

/* 弹窗 */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
/* 保证 hidden 属性优先于 display:flex，弹窗默认隐藏 */
.modal-mask[hidden] { display: none; }
.modal-box {
  background: #fff;
  border: 1px solid #999;
  width: min(360px, 92vw);
  padding: 16px 18px;
}
.modal-box h3 { color: #123f8a; margin-bottom: 6px; }
.modal-tip { font-size: 12px; color: #666; margin-bottom: 6px; }
.modal-box .form-row label { width: 92px; }

/* 窄屏适配 */
@media (max-width: 860px) {
  .columns { grid-template-columns: 1fr; }
  .site-title { font-size: 22px; }
}