/* 应用骨架、栅格与响应式 */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  height: 100vh;
  flex-direction: column;
  padding: var(--space-4) var(--space-3);
  border-right: 1px solid var(--color-hairline);
  background: var(--color-canvas);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px 20px;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  flex: none;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.brand-text {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 1px;
}

.brand-text strong {
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 18px;
}

.brand-text small {
  color: var(--color-mute);
  font-size: 11px;
  line-height: 14px;
}

.nav {
  display: grid;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-body);
  font-size: var(--text-base);
  line-height: 20px;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.nav-item:hover {
  background: var(--color-hairline-soft);
  color: var(--color-ink);
}

.nav-item.is-active {
  border-color: var(--color-hairline);
  background: var(--color-elevated);
  color: var(--color-ink);
  font-weight: 500;
}

.nav-item svg {
  color: var(--color-mute);
}

.nav-item.is-active svg {
  color: var(--color-ink);
}

.nav-count {
  margin-left: auto;
  padding: 0 6px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  color: var(--color-mute);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 18px;
}

.sidebar-foot {
  display: grid;
  gap: 6px;
  margin-top: auto;
  padding: 16px 10px 4px;
  border-top: 1px solid var(--color-hairline);
}

.env-line {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-body);
  font-size: var(--text-xs);
}

.env-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--color-warning);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.16);
}

.sidebar-meta {
  color: var(--color-mute);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 16px;
}

/* 主区域与顶栏 */
.main {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: var(--topbar-height);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  background: color-mix(in srgb, var(--color-canvas) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
}

.topbar-left {
  display: flex;
  min-width: 0;
  align-items: baseline;
  gap: 10px;
}

.topbar-crumb {
  color: var(--color-faint);
  font-family: var(--font-mono);
  font-size: 11px;
}

.topbar-title {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 24px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-meta {
  color: var(--color-mute);
  font-size: 11px;
}

.embed-head {
  display: none;
}

/* 内容区 */
.content {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-5) var(--space-6) var(--space-7);
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.page-head-main {
  min-width: 0;
}

.page-title {
  margin: 2px 0 0;
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 34px;
}

.page-sub {
  max-width: 760px;
  margin-top: 6px;
  color: var(--color-body);
  font-size: var(--text-base);
  line-height: 22px;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.section {
  margin-top: var(--space-5);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 24px;
}

.section-note {
  color: var(--color-mute);
  font-size: var(--text-xs);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.split {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(300px, 420px);
  gap: var(--space-4);
  align-items: start;
}

.dictionary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: var(--space-4);
  align-items: start;
}

.stack {
  display: grid;
  gap: var(--space-4);
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.wrap {
  flex-wrap: wrap;
}

.app-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-hairline);
  color: var(--color-mute);
  font-size: 11px;
  line-height: 16px;
}

/* 嵌入模式：隐藏侧栏与顶栏，保留紧凑头部 */
body.embed-mode .app {
  grid-template-columns: minmax(0, 1fr);
}

body.embed-mode .sidebar,
body.embed-mode .topbar {
  display: none;
}

body.embed-mode .content {
  max-width: none;
  padding: var(--space-4);
}

body.embed-mode .embed-head {
  display: block;
  padding: 12px var(--space-4) 0;
  border-bottom: 0;
  background: transparent;
}

body.embed-mode .embed-head > :not(.embed-nav) {
  display: none;
}

body.embed-mode .embed-brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
}

body.embed-mode .embed-title {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 1px;
}

body.embed-mode .embed-title strong {
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 18px;
}

body.embed-mode .embed-title small {
  color: var(--color-mute);
  font-size: 10px;
  line-height: 14px;
}

body.embed-mode .embed-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

body.embed-mode .nav-item--compact {
  padding: 5px 8px;
  font-size: var(--text-xs);
  line-height: 16px;
}

body.embed-mode .nav-item--compact svg {
  width: 13px;
  height: 13px;
}

body.embed-mode .page-title {
  font-size: var(--text-xl);
  line-height: 28px;
}

body.embed-mode .page-sub {
  font-size: var(--text-sm);
  line-height: 20px;
}

body.embed-mode .stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* 响应式 */
@media (max-width: 1200px) {
  .split {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  }
}

@media (max-width: 1024px) {
  .app {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: static;
    height: auto;
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
    padding: 10px 16px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-hairline);
  }

  .brand {
    padding: 0;
  }

  .brand-text {
    display: none;
  }

  .nav {
    display: flex;
    gap: 4px;
  }

  .nav-item {
    padding: 7px 10px;
    white-space: nowrap;
  }

  .nav-item span:not(.nav-count) {
    display: none;
  }

  .nav-count {
    margin-left: 0;
  }

  .sidebar-foot {
    display: none;
  }

  .topbar {
    padding: 0 var(--space-4);
  }

  .content {
    padding: var(--space-5) var(--space-4) var(--space-7);
  }

  .split,
  .dictionary-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 960px) {
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  body.embed-mode .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-title {
    font-size: 24px;
    line-height: 30px;
  }

  .topbar {
    flex-wrap: wrap;
    padding: 8px var(--space-4);
  }

  .topbar-left {
    width: 100%;
  }

  .topbar-right {
    width: 100%;
    justify-content: space-between;
  }

  .content {
    padding: var(--space-4) var(--space-3) var(--space-6);
  }
}

@media (max-width: 480px) {
  .sidebar {
    gap: 8px;
    padding: 8px 12px;
  }

  .nav-item {
    padding: 7px 8px;
  }

  .sidebar .nav-count {
    display: none;
  }

  .page-head {
    flex-direction: column;
  }

  .page-title {
    font-size: 22px;
    line-height: 28px;
  }

  body.embed-mode .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}