/* =====================================================================
   V1.1 多人协作 · 界面样式
   首页 Hub / 加入课堂 / 教师控制台 / 小组协作编辑器 / 班级展览馆
   ===================================================================== */

/* ---------------- 屏幕容器 ---------------- */
.screen {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  flex-direction: column;
  background:
    radial-gradient(1200px 600px at 12% -12%, #ffffff 0%, rgba(255, 255, 255, 0) 58%),
    radial-gradient(900px 520px at 100% 0%, #f9f5ea 0%, rgba(249, 245, 234, 0) 55%),
    var(--bg);
  overflow: hidden;
}
.screen.show { display: flex; }

.screen-head {
  height: 60px; flex: 0 0 60px;
  display: flex; align-items: center; gap: 14px;
  padding: 0 18px;
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  z-index: 5;
}
.screen-head .title { display: flex; flex-direction: column; line-height: 1.25; }
.screen-head .title b { font-size: 16px; letter-spacing: .4px; }
.screen-head .title i { font-style: normal; font-size: 11.5px; color: var(--ink-3); }
.screen-head .spacer { flex: 1; }

.screen-body { flex: 1; min-height: 0; position: relative; }

/* ---------------- 通用小块 ---------------- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  height: 30px; padding: 0 12px; border-radius: 15px;
  background: var(--panel); border: 1px solid var(--line);
  font-size: 13px; color: var(--ink-2); white-space: nowrap;
}
.pill b { color: var(--ink); font-weight: 650; }
.pill.primary { background: var(--primary-l); border-color: #cfe6f2; color: var(--primary-d); }
.pill.ok { background: #e9f5ee; border-color: #cbe8d9; color: var(--ok); }
.pill.warn { background: var(--orange-l); border-color: #f6e0c4; color: #b9691f; }
.pill.danger { background: #fdecec; border-color: #f8d7d7; color: #c0392b; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.pill .dot.off { background: var(--ink-3); }

.mini-tabs { display: flex; gap: 6px; }
.mini-tabs button {
  height: 32px; padding: 0 13px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--panel); font: inherit; font-size: 13.5px; color: var(--ink-2); cursor: pointer;
}
.mini-tabs button.on { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------------- 首页 Hub ---------------- */
.hub-wrap { position: absolute; inset: 0; overflow: auto; padding: 30px 34px 46px; }
.hub-hero {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  padding: 22px 26px; border-radius: var(--r-l);
  background: linear-gradient(120deg, #ffffff 0%, #f4faff 55%, #fdf6ec 100%);
  border: 1px solid var(--line);
  box-shadow: var(--sh-1);
}
.hub-logo {
  width: 78px; height: 78px; flex: 0 0 78px; border-radius: 22px;
  background: linear-gradient(150deg, var(--primary), #4aa8cf);
  box-shadow: 0 10px 26px rgba(47, 143, 191, .3);
  display: grid; place-items: center; color: #fff; font-size: 32px; font-weight: 700;
  position: relative;
}
.hub-logo::after {
  content: ""; position: absolute; inset: 10px; border: 2px dashed rgba(255, 255, 255, .5); border-radius: 13px;
}
.hub-hero h1 { font-size: 25px; margin: 0 0 4px; letter-spacing: .5px; }
.hub-hero p { margin: 0; color: var(--ink-2); font-size: 14px; max-width: 620px; }
.hub-hero .vtag {
  display: inline-block; margin-left: 8px; padding: 2px 9px; border-radius: 8px;
  background: var(--primary); color: #fff; font-size: 12px; vertical-align: middle;
}

.hub-section { margin-top: 26px; }
.hub-section > h3 {
  margin: 0 0 12px; font-size: 15px; letter-spacing: .5px;
  display: flex; align-items: center; gap: 8px;
}
.hub-section > h3::before {
  content: ""; width: 4px; height: 15px; border-radius: 2px; background: var(--primary);
}

.hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); gap: 14px; }

.hub-card {
  text-align: left; cursor: pointer;
  padding: 18px; border-radius: var(--r);
  background: var(--panel); border: 1px solid var(--line);
  box-shadow: var(--sh-1);
  transition: transform .18s, box-shadow .18s, border-color .18s;
  display: flex; flex-direction: column; gap: 9px;
  min-height: 132px;
}
.hub-card:hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: #cfe6f2; }
.hub-card .ico {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  font-size: 21px; background: var(--primary-l);
}
.hub-card.hot .ico { background: var(--orange-l); }
.hub-card b { font-size: 15.5px; }
.hub-card span { font-size: 12.8px; color: var(--ink-2); line-height: 1.5; }
.hub-card .tag {
  align-self: flex-start; font-size: 11px; padding: 1px 7px; border-radius: 6px;
  background: var(--bg-2); color: var(--ink-2);
}

.hub-recent { display: flex; flex-direction: column; gap: 8px; }
.hub-row {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 12px; background: var(--panel);
  border: 1px solid var(--line);
}
.hub-row .code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 17px; letter-spacing: 2px; }
.hub-row .meta { flex: 1; min-width: 0; }
.hub-row .meta b { display: block; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hub-row .meta i { font-style: normal; font-size: 12px; color: var(--ink-3); }

/* ---------------- 加入课堂 ---------------- */
.join-wrap { position: absolute; inset: 0; overflow: auto; display: grid; place-items: center; padding: 26px; }
.join-card {
  width: min(520px, 100%);
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-l);
  box-shadow: var(--sh-2); padding: 26px;
}
.join-card h2 { margin: 0 0 6px; font-size: 20px; }
.join-card > p.sub { margin: 0 0 18px; color: var(--ink-2); font-size: 13.5px; }
.code-input {
  width: 100%; height: 66px; text-align: center;
  font-size: 34px; letter-spacing: 12px; font-family: ui-monospace, Menlo, Consolas, monospace;
  text-transform: uppercase;
  border: 2px solid var(--line); border-radius: 14px; background: var(--panel-soft);
  outline: none; color: var(--ink);
}
.code-input:focus { border-color: var(--primary); background: #fff; }

.group-pick { display: grid; grid-template-columns: repeat(auto-fill, minmax(126px, 1fr)); gap: 10px; margin-top: 10px; }
.group-opt {
  cursor: pointer; border: 1.5px solid var(--line); border-radius: 12px; background: var(--panel);
  padding: 12px 8px; text-align: center; transition: border-color .15s, background .15s;
  display: flex; flex-direction: column; gap: 3px; align-items: center;
}
.group-opt b { font-size: 14.5px; }
.group-opt i { font-style: normal; font-size: 12px; color: var(--ink-3); }
.group-opt.on { border-color: var(--primary); background: var(--primary-l); }
.group-opt.full { opacity: .5; }

.nick-row { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.nick-row .input { flex: 1; }

/* ---------------- 控制台 / 编辑器通用布局 ---------------- */
.console { position: absolute; inset: 0; display: flex; flex-direction: column; }
.console-top {
  flex: 0 0 auto; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 14px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .75);
}
.console-mid { flex: 1; min-height: 0; display: flex; }
.console-side {
  width: 246px; flex: 0 0 246px; background: var(--panel);
  border-right: 1px solid var(--line); overflow: auto; padding: 12px;
}
.console-side.right { border-right: none; border-left: 1px solid var(--line); width: 292px; flex-basis: 292px; }
.console-main { flex: 1; min-width: 0; position: relative; }
.console-bottom {
  flex: 0 0 auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 9px 14px; border-top: 1px solid var(--line); background: rgba(255, 255, 255, .75);
}

.vp-host { position: absolute; inset: 0; }
.vp-badges { position: absolute; top: 10px; left: 12px; display: flex; gap: 6px; flex-wrap: wrap; pointer-events: none; }
.vp-tools { position: absolute; top: 10px; right: 12px; display: flex; gap: 6px; flex-wrap: wrap; }

/* 小组列表 */
.grp-list { display: flex; flex-direction: column; gap: 8px; }
.grp-item {
  cursor: pointer; border: 1px solid var(--line); border-radius: 12px; padding: 10px 11px;
  background: var(--panel-soft); transition: border-color .15s, background .15s;
}
.grp-item.on { border-color: var(--primary); background: var(--primary-l); }
.grp-item .top { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.grp-item .top b { font-size: 14px; }
.grp-item .sub { font-size: 11.5px; color: var(--ink-3); margin-top: 2px; }
.grp-item .dots { display: flex; gap: 3px; margin-top: 6px; }
.grp-item .dots i { width: 8px; height: 8px; border-radius: 50%; display: block; }

/* 成员 */
.mem-list { display: flex; flex-direction: column; gap: 6px; }
.mem-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 9px; border-radius: 10px; background: var(--panel-soft); border: 1px solid var(--line-2);
}
.mem-chip .av { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-size: 12px; font-weight: 650; flex: 0 0 24px; }
.mem-chip .nm { flex: 1; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mem-chip .st { font-size: 11px; color: var(--ink-3); }
.mem-chip.off { opacity: .45; }

/* 材料库 */
.mat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.mat-btn {
  cursor: pointer; border: 1px solid var(--line); border-radius: 12px; background: var(--panel);
  padding: 6px 4px 4px; display: flex; flex-direction: column; align-items: center; gap: 2px;
  transition: border-color .15s, transform .12s, box-shadow .15s;
}
.mat-btn:hover { border-color: var(--primary); box-shadow: var(--sh-1); }
.mat-btn:active { transform: scale(.96); }
.mat-btn img { width: 100%; height: 52px; object-fit: contain; }
.mat-btn span { font-size: 12.5px; color: var(--ink-2); }
.mat-btn.locked { opacity: .4; pointer-events: none; }

/* 操作提示流 */
.feed { display: flex; flex-direction: column; gap: 5px; max-height: 190px; overflow: auto; }
.feed-item { font-size: 12.5px; color: var(--ink-2); display: flex; gap: 7px; align-items: baseline; }
.feed-empty { font-size: 12.5px; color: var(--ink-3); padding: 6px 2px; }
.feed-item i { width: 7px; height: 7px; border-radius: 50%; flex: 0 0 7px; margin-top: 6px; }
.feed-item time { color: var(--ink-3); font-size: 11px; margin-left: auto; white-space: nowrap; }

/* 锁定提示 */
.lock-tag {
  position: absolute; padding: 3px 9px; border-radius: 9px; font-size: 12px; color: #fff;
  transform: translate(-50%, -50%); pointer-events: none; white-space: nowrap;
  box-shadow: 0 3px 10px rgba(0, 0, 0, .18);
}

/* 展览说明卡 */
.ex-card {
  position: absolute; right: 14px; bottom: 14px; width: min(330px, calc(100% - 28px));
  background: rgba(255, 255, 255, .96); border: 1px solid var(--line); border-radius: var(--r);
  box-shadow: var(--sh-2); padding: 14px 16px; backdrop-filter: blur(8px);
}
.ex-card h4 { margin: 0 0 4px; font-size: 16px; }
.ex-card .who { font-size: 12.5px; color: var(--ink-3); margin-bottom: 8px; }
.ex-card p { margin: 0 0 10px; font-size: 13px; color: var(--ink-2); line-height: 1.6; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.tag-pill {
  font-size: 12px; padding: 3px 10px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--panel-soft); color: var(--ink-2); cursor: pointer;
}
.tag-pill.on { background: var(--orange-l); border-color: #f0d3aa; color: #a9631c; }

/* 邀请码 + 二维码 */
.code-board {
  display: flex; gap: 18px; align-items: center; padding: 14px 16px;
  border-radius: var(--r); background: linear-gradient(120deg, #fff, #f4faff);
  border: 1px solid var(--line);
}
.code-big {
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 42px; letter-spacing: 6px;
  letter-spacing: 8px; color: var(--primary-d);
}
.qr-box { width: 116px; height: 116px; flex: 0 0 116px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 6px; }
.qr-box canvas, .qr-box img { width: 100%; height: 100%; display: block; }

/* 计时器 */
.timer {
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 20px; font-weight: 650;
  letter-spacing: 1px; color: var(--ink);
}
.timer.urgent { color: var(--warn); }

/* 响应式：平板 / 手机 */
@media (max-width: 1180px) {
  .console-side { width: 190px; flex-basis: 190px; }
  .console-side.right { width: 240px; flex-basis: 240px; }
}
@media (max-width: 900px) {
  .console-side { position: absolute; z-index: 6; top: 0; bottom: 0; transform: translateX(-100%); transition: transform .22s; box-shadow: var(--sh-2); }
  .console-side.right { right: 0; left: auto; transform: translateX(100%); }
  .console-side.peek { transform: translateX(0); }
  .console-main { flex: 1; }
  .mat-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .hub-wrap { padding: 18px 16px 34px; }
  .hub-hero { padding: 16px; gap: 14px; }
  .hub-logo { width: 58px; height: 58px; flex-basis: 58px; font-size: 24px; }
  .hub-hero h1 { font-size: 20px; }
  .code-big { font-size: 32px; letter-spacing: 5px; }
  .qr-box { width: 92px; height: 92px; flex-basis: 92px; }
}

/* 触屏：加大点击区 */
.touch .mat-btn { padding: 9px 4px 6px; }
.touch .tbtn { min-height: 46px; padding: 0 15px; }
.touch .btn { min-height: 44px; }