/* layout.css — 应用骨架 + 三档响应式 */

.app {
  display: grid;
  min-height: 100vh;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr var(--tabbar-h);
  grid-template-areas:
    "side top"
    "side main"
    "side tab";
}

.topbar { grid-area: top; }
.sidebar { grid-area: side; }
.main { grid-area: main; padding: var(--gutter); overflow: auto; }
.tabbar { grid-area: tab; display: none; }

/* 顶部条 */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 var(--gutter);
  background: var(--topbar-bg);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--panel-border);
  position: sticky; top: 0; z-index: 20;
}
.topbar .brand {
  display: flex; align-items: center; gap: 10px; font-weight: 700;
}
.topbar .brand .brand-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 4px;
  padding-left: 2px;
  background: linear-gradient(135deg, #b9c4ff 0%, #7c8cff 35%, #b780ff 65%, #ff9ad9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 24px rgba(124, 140, 255, .25);
  position: relative;
}
.topbar .brand .brand-text::after {
  content: '';
  position: absolute; left: 2px; right: 0; bottom: -4px; height: 2px;
  background: linear-gradient(90deg, rgba(124,140,255,.7), rgba(183,128,255,.5), transparent);
  border-radius: 2px;
}
.topbar .spacer { flex: 1; }
.topbar .pill {
  font-size: 12px; color: var(--muted); padding: 4px 10px;
  border: 1px solid var(--panel-border); border-radius: 999px;
}
.topbar .pill b { color: var(--text); margin-left: 6px; font-weight: 600; }
.topbar .hamburger {
  display: none; width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid var(--panel-border); background: transparent;
  align-items: center; justify-content: center;
}

/* 侧栏 */
.sidebar {
  background: linear-gradient(180deg, var(--topbar-bg), var(--bg-elev));
  border-right: 1px solid var(--panel-border);
  padding: 14px 10px;
  display: flex; flex-direction: column; gap: 6px;
  position: sticky; top: 0; height: 100vh;
  overflow: auto;
}
.sidebar .nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 10px;
  color: var(--muted); cursor: pointer;
  transition: background .15s, color .15s;
  min-height: 44px;
}
.sidebar .nav-item:hover { background: rgba(255, 255, 255, .04); color: var(--text); }
.sidebar .nav-item.active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(124, 140, 255, .18), rgba(183, 128, 255, .12));
  box-shadow: inset 0 0 0 1px var(--panel-border);
}
.sidebar .nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar .nav-section {
  margin-top: 14px; padding: 0 12px;
  font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px;
}
.sidebar .account-list {
  margin-top: 6px; display: flex; flex-direction: column; gap: 4px;
}
.sidebar .account-list .account-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 8px; cursor: pointer;
  font-size: 13px;
}
.sidebar .account-list .account-row:hover { background: rgba(255, 255, 255, .04); }
.sidebar .account-list .account-row.active { background: rgba(124, 140, 255, .14); color: var(--text); }
.sidebar .account-list .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex-shrink: 0;
}
.sidebar .account-list .dot.online { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.sidebar .account-list .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 底部 Tab（仅手机） */
.tabbar {
  background: var(--tabbar-bg);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--panel-border);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar .tab {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 4px; font-size: 11px; color: var(--muted);
  background: transparent; border: none; cursor: pointer;
}
.tabbar .tab.active { color: var(--primary); }
.tabbar .tab svg { width: 22px; height: 22px; }

/* 抽屉遮罩 */
.drawer-mask {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .55);
  z-index: 30; backdrop-filter: blur(4px);
}

/* ====== 平板：侧栏收为图标 ====== */
@media (max-width: 1199px) {
  :root { --sidebar-w: 72px; }
  .sidebar .nav-item .label,
  .sidebar .nav-section,
  .sidebar .account-list .name { display: none; }
  .sidebar .nav-item { justify-content: center; padding: 10px 8px; }
}

/* ====== 手机：抽屉 + 固定底部 Tab ====== */
@media (max-width: 767px) {
  :root { --sidebar-w: 0px; --tabbar-h: 60px; }
  /* 锁死整体视口高度，让 .main 内部滚动；底部 tabbar 不会随页面滚动 */
  html, body { height: 100%; overflow: hidden; }
  .app {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    overflow: hidden;
    grid-template-columns: 1fr;
    grid-template-areas:
      "top"
      "main"
      "tab";
  }
  .topbar { position: sticky; top: 0; }
  .main { padding-bottom: calc(var(--gutter) + env(safe-area-inset-bottom)); }
  .sidebar {
    position: fixed; top: 0; left: 0; width: 280px;
    height: 100vh; height: 100dvh;
    transform: translateX(-100%); transition: transform .25s ease;
    z-index: 40; padding: 14px 10px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar .nav-item .label,
  .sidebar .nav-section,
  .sidebar .account-list .name { display: block; }
  .sidebar .nav-item { justify-content: flex-start; padding: 10px 12px; }
  .topbar .hamburger { display: inline-flex; }
  .tabbar {
    display: flex;
    position: sticky; bottom: 0; z-index: 25;
  }
}