/* yun.xisi.chat 习思云教室 通用样式 — 适配 65 寸一体机大屏 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: #f0f4f8;
  color: #1f2d3d;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }

/* 顶部栏 */
.topbar {
  background: #ffffff;
  border-bottom: 2px solid #e6ecf2;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.topbar .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: #0e7a4d;
}
.topbar .brand .logo {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.topbar .brand .logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  border-radius: 10px;
}
.topbar .role-tag {
  font-size: 15px;
  color: #0e7a4d;
  background: #e7f5ee;
  border-radius: 999px;
  padding: 4px 14px;
}
.topbar .user-info { display: flex; align-items: center; gap: 14px; font-size: 16px; }
.btn-logout {
  border: 1px solid #d5dee7;
  background: #fff;
  color: #47596b;
  font-size: 15px;
  padding: 8px 20px;
  border-radius: 8px;
  cursor: pointer;
}
.btn-logout:hover { background: #f6f8fa; }

/* 主容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 24px 32px 60px; }
.section-title { font-size: 22px; font-weight: 700; margin: 28px 0 14px; color: #24384d; }
.section-title:first-child { margin-top: 8px; }

/* 卡片 */
.card {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e6ecf2;
  padding: 20px 24px;
  margin-bottom: 16px;
}

/* 今日课程卡片 */
.course-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.course-hero .time {
  font-size: 30px;
  font-weight: 800;
  color: #0e7a4d;
  min-width: 130px;
}
.course-hero .meta { flex: 1; min-width: 220px; }
.course-hero .meta .subject { font-size: 26px; font-weight: 700; }
.course-hero .meta .sub { font-size: 16px; color: #6b7c8d; margin-top: 4px; }
.course-hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 10px;
  padding: 14px 28px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s;
}
.btn:active { filter: brightness(.92); }
.btn-primary { background: #0e7a4d; color: #fff; }
.btn-blue { background: #1e6fd9; color: #fff; }
.btn-green { background: #0e7a4d; color: #fff; }
.btn-outline { background: #fff; color: #1f2d3d; border: 1.5px solid #c9d6e2; }
.btn-sm { padding: 10px 18px; font-size: 15px; border-radius: 8px; }
.btn-danger { background: #d64545; color: #fff; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* 会议号展示 */
.meeting-id-box {
  background: #f2f9f5;
  border: 1.5px dashed #0e7a4d;
  border-radius: 10px;
  padding: 14px 20px;
  font-size: 20px;
  font-weight: 700;
  color: #0e7a4d;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 2px;
}

/* 表格 */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid #edf1f5; font-size: 16px; }
th { background: #f7f9fb; color: #47596b; font-weight: 600; font-size: 15px; }
tr:hover td { background: #fafcfd; }
td .tag {
  display: inline-block;
  background: #e7f5ee; color: #0e7a4d;
  border-radius: 6px; padding: 2px 10px; font-size: 13px;
}

/* 表单 */
.form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin-bottom: 14px; }
.form-item { display: flex; flex-direction: column; gap: 6px; }
.form-item label { font-size: 14px; color: #47596b; }
.form-item input, .form-item select {
  border: 1.5px solid #d5dee7;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 16px;
  min-width: 150px;
  background: #fff;
}
.form-item input:focus, .form-item select:focus { outline: 2px solid #bcd9cd; border-color: #0e7a4d; }

/* 提示条 */
.alert {
  padding: 12px 18px;
  border-radius: 8px;
  margin-bottom: 14px;
  font-size: 15px;
  display: none;
}
.alert.show { display: block; }
.alert.ok { background: #e7f5ee; color: #0e7a4d; border: 1px solid #bcd9cd; }
.alert.err { background: #fdecec; color: #c0392b; border: 1px solid #f2c4c4; }

/* 空状态 */
.empty { text-align: center; color: #8a99a8; padding: 30px 0; font-size: 16px; }

/* 登录页 */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0e7a4d 0%, #0f9d63 55%, #17b06f 100%);
  padding: 24px;
}
.login-card {
  background: #fff;
  border-radius: 20px;
  width: 440px;
  max-width: 100%;
  padding: 44px 40px 36px;
  box-shadow: 0 18px 50px rgba(0,0,0,.18);
}
.login-card .logo {
  width: 72px; height: 72px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
}
.login-card .logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  border-radius: 14px;
}
.login-card h1 { text-align: center; font-size: 26px; color: #1f2d3d; }
.login-card .sub { text-align: center; color: #6b7c8d; font-size: 15px; margin: 8px 0 28px; }
.login-card .form-item { margin-bottom: 16px; }
.login-card .form-item input { font-size: 17px; padding: 13px 16px; min-width: 100%; }
.login-card .btn-login {
  width: 100%;
  background: #0e7a4d;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 6px;
}
.login-card .btn-login:hover { background: #0c6a43; }
.login-tip { text-align: center; color: #8a99a8; font-size: 13px; margin-top: 18px; }

/* 统一页脚：备案 + 版权 */
.site-footer {
  background: #ffffff;
  border-top: 1px solid #e6ecf2;
  padding: 20px 32px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: #47596b;
  font-weight: 600;
}
.footer-brand img { width: 30px; height: 30px; object-fit: contain; border-radius: 6px; }
.footer-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #8a99a8;
}
.footer-info a { color: #8a99a8; text-decoration: none; }
.footer-info a:hover { color: #0e7a4d; }
/* 升级新版按钮（与其他站点一致） */
.btn-upgrade {
  font-size: 10px;
  line-height: 1;
  color: #f0a85c;
  border: 1px solid rgba(240,168,92,.45);
  background: rgba(240,168,92,.08);
  padding: 3px 8px;
  border-radius: 14px;
  cursor: pointer;
  white-space: nowrap;
}
.btn-upgrade:hover { background: rgba(240,168,92,.18); }
/* 上线时间 */
.footer-deploy-time {
  font-size: 10px;
  color: #b6c2cc;
  white-space: nowrap;
}
@media (max-width: 768px) {
  .footer-info { flex-direction: column; gap: 4px; }
}

/* 响应式 —— 手机端适配 */
@media (max-width: 768px) {
  /* 顶部栏 */
  .topbar { padding: 12px 16px; gap: 8px; }
  .topbar .brand { font-size: 18px; gap: 8px; }
  .topbar .brand .logo { width: 36px; height: 36px; }
  .topbar .role-tag { font-size: 12px; padding: 3px 10px; }
  .topbar .user-info { font-size: 14px; gap: 10px; flex-wrap: wrap; }
  .btn-logout { font-size: 14px; padding: 7px 14px; }

  /* 容器与标题 */
  .container { padding: 14px 14px 40px; }
  .section-title { font-size: 19px; margin: 22px 0 10px; }

  /* 卡片 */
  .card { padding: 14px 14px; border-radius: 10px; }
  .course-hero { gap: 12px; }
  .course-hero .time { font-size: 22px; min-width: 0; }
  .course-hero .meta { min-width: 0; flex: 1 1 100%; }
  .course-hero .meta .subject { font-size: 21px; }
  .course-hero .meta .sub { font-size: 14px; }
  .course-hero .actions { width: 100%; }
  .course-hero .actions .btn { flex: 1; }
  .meeting-id-box { font-size: 16px; padding: 12px 14px; letter-spacing: 1px; }

  /* 按钮 */
  .btn { font-size: 15px; padding: 12px 18px; border-radius: 8px; }
  .btn-sm { padding: 9px 14px; font-size: 14px; }

  /* 表单：单列全宽 */
  .form-row { gap: 10px; }
  .form-item { flex: 1 1 100%; }
  .form-item input, .form-item select { min-width: 100%; font-size: 15px; padding: 11px 12px; }
  .form-item label { font-size: 13px; }

  /* 表格：横向滑动 */
  .table-wrap { margin: 0 -4px; }
  .table-wrap table { min-width: 640px; }
  th, td { padding: 10px 12px; font-size: 14px; }
  th { font-size: 13px; }

  /* 登录页 */
  .login-wrap { padding: 16px; }
  .login-card { padding: 32px 24px 28px; border-radius: 16px; }
  .login-card .logo { width: 60px; height: 60px; }
  .login-card h1 { font-size: 22px; }
  .login-card .sub { font-size: 14px; margin: 6px 0 20px; }
  .login-card .form-item input { font-size: 16px; padding: 12px 14px; }
  .login-card .btn-login { font-size: 17px; padding: 13px; }

  /* 弹窗：近全屏 */
  #userModal > div, #courseModal > div, #meetingModal > div {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    padding: 24px 20px;
    max-height: 92vh;
    overflow-y: auto;
  }
  #userModal, #courseModal, #meetingModal { padding: 8px; }

  /* 页脚 */
  .site-footer { padding: 16px 12px; }
  .footer-brand { flex-wrap: wrap; justify-content: center; font-size: 14px; }
  .footer-brand img { width: 26px; height: 26px; }
  .footer-info { gap: 6px; font-size: 12px; text-align: center; }
  .footer-info span, .footer-info a { display: block; }
  .footer-deploy-time { font-size: 9px; }
  .btn-upgrade { font-size: 9px; padding: 3px 7px; }
}

@media (max-width: 480px) {
  .login-card { padding: 26px 18px 22px; }
  .login-card h1 { font-size: 20px; }
  .topbar .user-info { justify-content: flex-end; }
  .btn { width: 100%; }
  .form-row .btn { width: 100%; }
  .course-hero .actions .btn { flex: 1 1 100%; }
}

/* 管理端紧凑布局（仅 admin.html） */
.admin-compact .topbar { padding: 8px 20px; gap: 6px; }
.admin-compact .topbar .brand { font-size: 17px; gap: 8px; }
.admin-compact .topbar .brand .logo { width: 30px; height: 30px; }
.admin-compact .topbar .role-tag { font-size: 12px; padding: 3px 10px; }
.admin-compact .topbar .user-info { font-size: 13px; gap: 10px; }
.admin-compact .btn-logout { font-size: 13px; padding: 6px 14px; }
.admin-compact .container { padding: 14px 20px 36px; }
.admin-compact .section-title { font-size: 16px; margin: 16px 0 8px; }
.admin-compact .card { padding: 12px 14px; margin-bottom: 12px; border-radius: 8px; }
.admin-compact .form-row { gap: 8px; margin-bottom: 10px; }
.admin-compact .form-item { gap: 3px; }
.admin-compact .form-item label { font-size: 12px; }
.admin-compact .form-item input,
.admin-compact .form-item select {
  padding: 6px 10px;
  font-size: 13px;
  min-width: 100px;
  border-radius: 6px;
}
.admin-compact .btn { font-size: 13px; padding: 8px 14px; border-radius: 6px; }
.admin-compact .btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 5px; }
.admin-compact th, .admin-compact td { padding: 7px 10px; font-size: 13px; }
.admin-compact th { font-size: 12px; }
.admin-compact td .tag { padding: 1px 8px; font-size: 12px; }
.admin-compact .alert { padding: 8px 12px; font-size: 13px; margin-bottom: 10px; }
.admin-compact .empty { padding: 18px 0; font-size: 13px; }
.admin-compact .form-row > .form-item { min-width: 90px; }
.admin-compact .form-row .btn { align-self: flex-end; }
.admin-compact #userModal > div,
.admin-compact #courseModal > div {
  padding: 20px 22px;
}
.admin-compact #userModal .form-item input,
.admin-compact #courseModal .form-item input,
.admin-compact #userModal .form-item select,
.admin-compact #courseModal .form-item select {
  min-width: 100%;
  padding: 7px 10px;
  font-size: 13px;
}
.admin-compact #userModal .form-item,
.admin-compact #courseModal .form-item { margin-bottom: 8px; }

@media (max-width: 768px) {
  .admin-compact .form-item input,
  .admin-compact .form-item select { min-width: 100%; }
  .admin-compact .form-row .btn { width: 100%; }
}