/* ============================================================
   layout.css — 侧边栏、主区域、响应式
   ============================================================ */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* ---------------- 侧边栏 ---------------- */

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-soft);
  flex-shrink: 0;
}
.brand .logo {
  width: 28px; height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--info));
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.brand .logo svg { width: 16px; height: 16px; }
.brand-text { min-width: 0; }
.brand-text strong {
  display: block;
  font-size: 13.5px;
  letter-spacing: .2px;
}
.brand-text span {
  display: block;
  font-size: 10.5px;
  color: var(--text-faint);
  font-family: var(--mono);
}

.nav {
  padding: 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}
.nav-group-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  padding: 12px 10px 5px;
  font-weight: 600;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 0;
  background: transparent;
  color: var(--text-dim);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: var(--transition);
  position: relative;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: -10px; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 18px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}
.nav-item svg { width: 15px; height: 15px; flex-shrink: 0; opacity: .85; }
.nav-item .count {
  margin-left: auto;
  font-size: 10.5px;
  font-family: var(--mono);
  color: var(--text-faint);
  background: var(--surface-3);
  padding: 1px 6px;
  border-radius: 20px;
}
.nav-item.active .count { background: var(--accent); color: #fff; }

.sidebar-foot {
  padding: 12px 14px;
  border-top: 1px solid var(--border-soft);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.status-line {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--text-faint);
  font-family: var(--mono);
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-faint);
  flex-shrink: 0;
}
.status-dot.ok { background: var(--ok); box-shadow: 0 0 7px var(--ok); }
.status-dot.err { background: var(--danger); box-shadow: 0 0 7px var(--danger); }
.status-dot.warn { background: var(--warn); }

/* ---------------- 主区域 ---------------- */

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

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 22px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-shrink: 0;
}
.topbar h1 { font-size: 16px; }
.topbar .sub { font-size: 12px; color: var(--text-faint); }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.menu-toggle { display: none; }

.content {
  padding: 20px 22px 40px;
  max-width: 1500px;
  width: 100%;
}

.view { display: none; flex-direction: column; gap: 16px; }
.view.active { display: flex; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ---------------- 响应式 ---------------- */

@media (max-width: 1080px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 264px;
    z-index: 60;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }

  .menu-toggle {
    display: grid;
    place-items: center;
    width: 32px; height: 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    cursor: pointer;
  }
  .menu-toggle:hover { color: var(--text); }

  .scrim {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .5);
    z-index: 55;
  }
  .content { padding: 16px 14px 40px; }
  .topbar { padding: 0 14px; }
}

@media (max-width: 640px) {
  .topbar h1 { font-size: 14px; }
  .hide-sm { display: none !important; }
}