/* ============================================================
   肯森特AI — 布局样式：app容器、侧边栏、主内容区、Header
   ============================================================ */

.app {
  display: flex;
  height: 100vh;
}

/* ---- 侧边栏 ---- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-brand {
  padding: var(--space-5) var(--space-4) var(--space-4);
}

.sidebar-brand h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-gray-900);
}

.sidebar-brand p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-top: 2px;
}

.sidebar-nav {
  padding: 0 var(--space-3) var(--space-3);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.nav-item:hover {
  background: var(--color-primary-light);
}

.nav-item.active {
  background: var(--color-primary-medium);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 0 3px 3px 0;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* ---- 侧边栏历史 ---- */
.sidebar-hist {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--space-3);
}

.sidebar-hist .sh {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: var(--space-2) 0 var(--space-1);
}

.hist-search {
  padding: 0 var(--space-3) var(--space-2);
}

.hist-search input {
  width: 100%;
  height: 32px;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: inherit;
  outline: none;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.hist-search input:focus {
  border-color: var(--color-primary);
}

.hist-search input::placeholder {
  color: var(--text-muted);
}

.hist-item {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-700);
  cursor: pointer;
  border-radius: var(--radius-md);
  min-width: 0;
}

.hist-item:hover {
  background: var(--color-primary-light);
}

.hist-item.active {
  background: var(--color-primary-medium);
  color: var(--color-primary);
  font-weight: 500;
}

.hist-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-xs);
  padding: var(--space-6) 0;
}

/* ---- 可展开的二级成果列表 ---- */
.d-group {
  margin-bottom: 2px;
}

.d-group-hdr {
  display: flex;
  align-items: center;
  height: 32px;
  padding: 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-800);
  cursor: pointer;
  border-radius: var(--radius-md);
  gap: 4px;
}

.d-group-hdr:hover {
  background: var(--color-primary-light);
}

.d-arrow {
  font-size: 10px;
  color: var(--text-muted);
  width: 14px;
  text-align: center;
  flex-shrink: 0;
  transition: transform 0.15s;
}

.d-topic {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.d-date {
  font-size: var(--text-xs);
  color: var(--text-muted);
  flex-shrink: 0;
  margin-left: auto;
}

.d-del {
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.15s;
  padding: 0 4px;
  line-height: 1;
}
.d-group-hdr:hover .d-del { opacity: 1; }
.hist-item:hover .d-del { opacity: 1; }
.d-del:hover { color: #EF4444; }

.hist-item-del {
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
  padding: 0 4px;
  margin-left: 4px;
}
.hist-item:hover .hist-item-del { opacity: 1; }
.hist-item-del:hover { color: #EF4444; }

.d-items {
  padding-left: 12px;
}

.d-item {
  display: flex;
  align-items: center;
  height: 28px;
  padding: 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  cursor: pointer;
  border-radius: var(--radius-md);
  gap: 4px;
}

.d-item:hover {
  background: var(--color-primary-light);
}

.d-item-icon {
  font-size: 13px;
  flex-shrink: 0;
}

.d-item-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.d-item-type {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}

.d-detail {
  padding: 4px var(--space-2) 8px 24px;
  border-left: 2px solid var(--color-primary-light);
  margin-left: 12px;
  margin-bottom: 4px;
}

.d-detail-inner {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  line-height: 1.5;
  max-height: 120px;
  overflow-y: auto;
}

.d-detail-inner p {
  margin: 0 0 4px 0;
}

.d-defect-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid var(--border-light);
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--border-color);
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: center;
}

.sidebar-footer a {
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.sidebar-footer a:hover {
  color: var(--color-primary);
}

/* ---- 主内容区 ---- */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-secondary);
  overflow-y: auto;
}

.main.home .chat-scroll { flex: 1; overflow-y: auto; min-height: 300px; }
.main.home .icp-footer { flex-shrink: 0; }

/* ---- Header ---- */
.header-row {
  height: var(--header-height);
  padding: 14px var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  background: rgba(245, 245, 247, .82);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
}

.header-btns {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Apple-style back button */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 32px;
  padding: 0 14px 0 8px;
  background: rgba(0, 122, 255, .08);
  border: none;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  transition: background .2s, transform .15s;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.btn-back:hover {
  background: rgba(0, 122, 255, .16);
}
.btn-back:active {
  transform: scale(.96);
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-6);
  flex-shrink: 0;
}

.breadcrumb a {
  color: var(--color-primary);
  cursor: pointer;
}

.breadcrumb .sep {
  color: var(--color-gray-300);
}

/* ---- ICP备案号 ---- */
.icp-footer {
  text-align: center;
  padding: 16px 0 20px;
  flex-shrink: 0;
  font-size: 11px;
  color: var(--color-gray-400);
}
.icp-footer a {
  font-size: 11px;
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.icp-footer a:hover {
  color: var(--color-gray-500);
}