/* 应用外壳：侧边栏 + 顶栏 + 内容区 */
.shell { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }

.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 14px 10px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 16px; }
.brand img { width: 30px; height: 30px; }
.brand b { font-size: 16px; letter-spacing: .02em; }
.brand small { display: block; font-size: 11px; color: var(--text-3); font-weight: 400; }

.nav-group { margin-top: 10px; }
.nav-group > span {
  display: block; padding: 6px 10px; font-size: 11px; font-weight: 600;
  color: var(--text-3); letter-spacing: .06em;
}
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px; margin: 1px 0;
  border-radius: var(--radius-sm); color: var(--text-2); font-weight: 500;
  transition: background .15s var(--ease), color .15s;
}
.nav a svg { width: 17px; height: 17px; flex: none; opacity: .85; }
.nav a:hover { background: var(--surface-3); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--primary-soft); color: var(--primary-text); }
.nav a.active svg { opacity: 1; }
.nav a .count {
  margin-left: auto; font-size: 11px; padding: 0 6px; border-radius: 10px;
  background: var(--danger); color: #fff; line-height: 18px;
}
.sidebar-foot { margin-top: auto; padding: 12px 8px 0; font-size: 12px; color: var(--text-3); }

.main { min-width: 0; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 20; height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px; padding: 0 24px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.search-trigger {
  display: flex; align-items: center; gap: 8px; width: min(440px, 50vw); height: 36px; padding: 0 12px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
  color: var(--text-3); cursor: pointer; transition: border-color .15s;
}
.search-trigger:hover { border-color: var(--border-strong); }
.search-trigger svg { width: 16px; height: 16px; flex-shrink: 0; }
.search-trigger .label { min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.search-trigger kbd { margin-left: auto; }
.topbar .spacer { flex: 1; }
.avatar {
  flex-shrink: 0;
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c1), var(--c6)); color: #fff; font-weight: 600; font-size: 13px;
}

.content { padding: 24px; max-width: 1480px; width: 100%; margin: 0 auto; animation: fade-in .25s var(--ease); }

.page-head { display: flex; align-items: flex-end; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.page-head .titles { flex: 1; min-width: 240px; }
.page-head p { color: var(--text-2); margin-top: 4px; }
.crumbs { font-size: 12px; color: var(--text-3); margin-bottom: 4px; }
.crumbs a { color: var(--text-3); }

.mobile-toggle { display: none; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 60; width: 260px; transform: translateX(-100%); transition: transform .2s var(--ease); }
  .shell.nav-open .sidebar { transform: none; box-shadow: var(--shadow-lg); }
  .mobile-toggle { display: inline-flex; }
  .content { padding: 16px; }
  .topbar { padding: 0 12px; gap: 8px; }
}
/* 手机：用户名与快捷键提示让位给搜索框（头像仍可进个人设置） */
@media (max-width: 600px) {
  .search-trigger { flex: 1; min-width: 0; width: auto; }
  .search-trigger kbd, .topbar .user-meta, .topbar .spacer { display: none; }
}

/* 登录页 */
.login {
  min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr;
}
.login-art {
  position: relative; overflow: hidden; padding: 48px; color: #fff;
  background: radial-gradient(1200px 600px at 10% 10%, #6366f1 0%, transparent 60%),
              radial-gradient(900px 500px at 90% 90%, #0ea5e9 0%, transparent 55%), #0b1024;
  display: flex; flex-direction: column; justify-content: space-between;
}
.login-art h1 { font-size: 34px; line-height: 1.25; max-width: 460px; }
.login-art ul { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; max-width: 460px; }
.login-art li { display: flex; gap: 10px; color: rgba(255, 255, 255, .85); }
.login-art li b { color: #fff; }
.login-form { display: grid; place-items: center; padding: 32px; background: var(--surface); }
.login-form form { width: min(360px, 100%); display: grid; gap: 16px; }
@media (max-width: 900px) { .login { grid-template-columns: 1fr; } .login-art { display: none; } }