<script setup lang="ts">
import {
  ArrowLeft,
  Database,
  FileText,
  Folder,
  FolderPlus,
  Loader,
  Trash2,
  Upload,
  X,
} from 'lucide-vue-next'
import { useKnowledgeView } from '@/pages/knowledge/composables/useKnowledgeView'

const {
  documents,
  currentFolderId,
  isLoadingDocuments,
  uploadError,
  uploadInput,
  showNewFolderDialog,
  newFolderName,
  newFolderParentId,
  showRenameDialog,
  renameFolderName,
  showDeleteDialog,
  deletingFolder,
  showDocumentDialog,
  activeDocument,
  activeDocumentContent,
  isLoadingDocumentContent,
  isRoot,
  visibleFolders,
  breadcrumbs,
  explorerTitle,
  enterFolder,
  goToFolder,
  goBack,
  triggerUpload,
  handleUpload,
  handleDeleteDocument,
  openNewFolderDialog,
  createFolder,
  openRenameDialog,
  renameFolder,
  openDeleteDialog,
  deleteFolder,
  openDocument,
  closeDocumentDialog,
  getFileTypeColor,
  formatFileSize,
  formatDate,
} = useKnowledgeView()
</script>

<template>
  <div class="knowledge-view grid-bg scanlines">
    <div class="page-header">
      <div class="header-left">
        <div class="header-icon"><Database :size="20" /></div>
        <div class="header-text">
          <h1>KNOWLEDGE BASE</h1>
          <span class="header-sub">{{ explorerTitle }}</span>
        </div>
      </div>
      <div class="header-actions">
        <button class="btn" @click="openNewFolderDialog(currentFolderId)">
          <FolderPlus :size="14" />
          {{ isRoot ? '新建文件夹' : '新建子文件夹' }}
        </button>
        <button v-if="!isRoot" class="btn primary" @click="triggerUpload">
          <Upload :size="14" /> 上传文件
        </button>
      </div>
    </div>

    <input
      ref="uploadInput"
      type="file"
      class="hidden-upload"
      accept=".pdf,.md,.txt,.docx"
      @change="handleUpload"
    />

    <div class="explorer-shell holo-card">
      <div class="toolbar">
        <div class="toolbar-left">
          <button class="nav-btn" :disabled="isRoot" @click="goBack">
            <ArrowLeft :size="14" />
          </button>
          <div class="breadcrumbs">
            <button
              v-for="(crumb, index) in breadcrumbs"
              :key="`${crumb.id ?? 'root'}-${index}`"
              class="breadcrumb-item"
              :class="{ active: crumb.id === currentFolderId || (crumb.id === null && isRoot) }"
              @click="goToFolder(crumb.id)"
            >
              {{ crumb.name }}
            </button>
          </div>
        </div>
        <div class="toolbar-right">
          <span class="location-tag">{{ isRoot ? 'ROOT' : 'FOLDER' }}</span>
        </div>
      </div>

      <div v-if="uploadError" class="upload-error">
        {{ uploadError }}
      </div>

      <div v-if="isLoadingDocuments" class="loading-strip">
        <Loader :size="14" class="spin" />
        <span>正在同步当前目录...</span>
      </div>

      <div class="explorer-grid">
        <template v-if="visibleFolders.length || documents.length">
          <button
            v-for="folder in visibleFolders"
            :key="folder.id"
            class="explorer-tile folder-tile"
            @click="enterFolder(folder)"
          >
            <div class="folder-activate-flash"></div>
            <div class="tile-frame"></div>
            <div class="folder-tech-corners">
              <span class="corner corner-tl"></span>
              <span class="corner corner-tr"></span>
              <span class="corner corner-bl"></span>
              <span class="corner corner-br"></span>
            </div>
            <div class="folder-scan"></div>
            <div class="folder-grid-lines"></div>
            <div class="tile-actions" @click.stop>
              <button class="icon-btn" title="重命名文件夹" @click="openRenameDialog(folder)">
                <FileText :size="12" />
              </button>
              <button class="icon-btn danger" title="删除文件夹" @click="openDeleteDialog(folder)">
                <Trash2 :size="12" />
              </button>
            </div>
            <div class="folder-glyph">
              <div class="folder-pulse-ring"></div>
              <div class="folder-core">
                <Folder :size="42" />
              </div>
              <span class="folder-beam beam-a"></span>
              <span class="folder-beam beam-b"></span>
            </div>
            <div class="folder-label-bar">
              <div class="tile-name folder-title-name">{{ folder.name }}</div>
            </div>
            <div class="tile-meta folder-meta">{{ folder.children?.length ?? 0 }} 个子文件夹</div>
          </button>

          <button
            v-for="doc in documents"
            :key="doc.id"
            class="explorer-tile file-tile"
            @click="openDocument(doc)"
          >
            <div class="tile-frame"></div>
            <div class="tile-actions" @click.stop>
              <button class="icon-btn danger" title="删除文件" @click="handleDeleteDocument(doc.id)">
                <Trash2 :size="12" />
              </button>
            </div>
            <div class="file-badge" :style="{ color: getFileTypeColor(doc.file_type), borderColor: `${getFileTypeColor(doc.file_type)}55` }">
              {{ doc.file_type.toUpperCase() }}
            </div>
            <div class="file-icon" :style="{ color: getFileTypeColor(doc.file_type) }">
              <FileText :size="38" />
            </div>
            <div class="tile-name">{{ doc.title }}</div>
            <div class="tile-meta">{{ formatFileSize(doc.file_size) }} · {{ formatDate(doc.created_at) }}</div>
            <div class="tile-status" :class="doc.is_indexed ? 'indexed' : 'pending'">
              {{ doc.is_indexed ? 'INDEXED' : 'INDEXING...' }}
            </div>
          </button>
        </template>

        <div v-else class="empty-state">
          <div class="empty-core-shell">
            <div class="empty-orbit orbit-outer"></div>
            <div class="empty-orbit orbit-inner"></div>
            <div class="empty-scanline"></div>
            <div class="empty-core-glow"></div>
            <div class="empty-folder-chamber">
              <div class="empty-folder-plate"></div>
              <div class="empty-folder-pulse"></div>
              <div class="empty-folder-icon-wrap">
                <Folder :size="54" />
              </div>
              <span class="empty-beam beam-left"></span>
              <span class="empty-beam beam-right"></span>
            </div>
          </div>

          <div class="empty-copy">
            <span class="empty-kicker">{{ isRoot ? 'ARCHIVE CORE ONLINE' : 'FOLDER CHAMBER STANDBY' }}</span>
            <span class="empty-title">{{ isRoot ? 'ROOT DIRECTORY EMPTY' : 'FOLDER IS READY FOR DEPLOYMENT' }}</span>
            <span class="empty-sub">
              {{ isRoot ? '当前知识库尚未初始化目录结构，请先创建第一个文件夹。' : '当前目录为空，可在此新建子文件夹或上传文件。' }}
            </span>
          </div>

          <div class="empty-actions">
            <button class="btn primary empty-cta" @click="openNewFolderDialog(currentFolderId)">
              <FolderPlus :size="14" />
              {{ isRoot ? '初始化知识仓库' : '新建子文件夹' }}
            </button>
            <button v-if="!isRoot" class="btn" @click="triggerUpload">
              <Upload :size="14" /> 上传文件
            </button>
          </div>
        </div>
      </div>
    </div>

    <div v-if="showNewFolderDialog" class="dialog-overlay" @click.self="showNewFolderDialog = false">
      <div class="dialog">
        <div class="dialog-header">
          <h3>{{ isRoot && newFolderParentId === null ? '新建文件夹' : '新建子文件夹' }}</h3>
          <button class="close-btn" @click="showNewFolderDialog = false">
            <X :size="16" />
          </button>
        </div>
        <input
          v-model="newFolderName"
          class="dialog-input"
          placeholder="文件夹名称"
          @keyup.enter="createFolder"
          autofocus
        />
        <div class="dialog-actions">
          <button class="btn" @click="showNewFolderDialog = false">取消</button>
          <button class="btn primary" @click="createFolder">创建</button>
        </div>
      </div>
    </div>

    <div v-if="showRenameDialog" class="dialog-overlay" @click.self="showRenameDialog = false">
      <div class="dialog">
        <div class="dialog-header">
          <h3>重命名文件夹</h3>
          <button class="close-btn" @click="showRenameDialog = false">
            <X :size="16" />
          </button>
        </div>
        <input
          v-model="renameFolderName"
          class="dialog-input"
          placeholder="文件夹名称"
          @keyup.enter="renameFolder"
          autofocus
        />
        <div class="dialog-actions">
          <button class="btn" @click="showRenameDialog = false">取消</button>
          <button class="btn primary" @click="renameFolder">重命名</button>
        </div>
      </div>
    </div>

    <div v-if="showDeleteDialog" class="dialog-overlay" @click.self="showDeleteDialog = false">
      <div class="dialog">
        <div class="dialog-header">
          <h3>删除文件夹</h3>
          <button class="close-btn" @click="showDeleteDialog = false">
            <X :size="16" />
          </button>
        </div>
        <p class="dialog-body">
          确定要删除文件夹「{{ deletingFolder?.name }}」吗？该操作不可恢复。
        </p>
        <div class="dialog-actions">
          <button class="btn" @click="showDeleteDialog = false">取消</button>
          <button class="btn danger" @click="deleteFolder">删除</button>
        </div>
      </div>
    </div>

    <div v-if="showDocumentDialog && activeDocument" class="dialog-overlay" @click.self="closeDocumentDialog()">
      <div class="dialog document-dialog">
        <div class="dialog-header">
          <h3>{{ activeDocument.title }}</h3>
          <button class="close-btn" @click="closeDocumentDialog()">
            <X :size="16" />
          </button>
        </div>

        <div class="document-info-row">
          <span class="file-badge" :style="{ color: getFileTypeColor(activeDocument.file_type), borderColor: `${getFileTypeColor(activeDocument.file_type)}55` }">
            {{ activeDocument.file_type.toUpperCase() }}
          </span>
          <span>{{ formatFileSize(activeDocument.file_size) }}</span>
          <span>{{ activeDocument.chunk_count }} chunks</span>
        </div>

        <div class="document-preview">
          <div v-if="isLoadingDocumentContent" class="preview-loading">
            <Loader :size="16" class="spin" />
            <span>加载文档内容中...</span>
          </div>
          <pre v-else>{{ activeDocumentContent || '暂无可预览内容。' }}</pre>
        </div>
      </div>
    </div>
  </div>
</template>

<style scoped>
.knowledge-view {
  height: 100%;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-icon {
  color: var(--accent-cyan);
  filter: drop-shadow(0 0 8px var(--accent-cyan));
}

h1 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  margin: 0;
}

.header-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hidden-upload {
  display: none;
}

.explorer-shell {
  min-height: 620px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  background: linear-gradient(180deg, rgba(0, 245, 212, 0.06), rgba(0, 245, 212, 0.02));
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}

.nav-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 245, 212, 0.08);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  color: var(--accent-cyan);
}

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

.breadcrumb-item {
  padding: 6px 10px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.breadcrumb-item:hover,
.breadcrumb-item.active {
  color: var(--accent-cyan);
  border-color: var(--border-mid);
  background: rgba(0, 245, 212, 0.08);
}

.location-tag {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-mid);
  color: var(--accent-cyan);
  background: rgba(0, 245, 212, 0.08);
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.upload-error,
.loading-strip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11px;
}

.upload-error {
  color: var(--accent-red);
  background: rgba(255, 71, 87, 0.08);
  border: 1px solid rgba(255, 71, 87, 0.2);
}

.loading-strip {
  color: var(--accent-cyan);
  background: rgba(0, 245, 212, 0.06);
  border: 1px solid var(--border-dim);
}

.explorer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(196px, 1fr));
  gap: 18px;
  align-content: start;
}

.explorer-tile {
  position: relative;
  min-height: 220px;
  padding: 18px 16px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-dim);
  background:
    radial-gradient(circle at top, rgba(0, 245, 212, 0.08), transparent 45%),
    linear-gradient(180deg, rgba(10, 15, 26, 0.92), rgba(13, 21, 37, 0.98));
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.explorer-tile:hover {
  border-color: var(--border-bright);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

.tile-frame {
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(0, 245, 212, 0.08);
  border-radius: 16px;
  pointer-events: none;
}

.tile-actions {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  gap: 6px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.explorer-tile:hover .tile-actions {
  opacity: 1;
}

.icon-btn {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(0, 9, 19, 0.78);
  border: 1px solid var(--border-dim);
  color: var(--text-secondary);
}

.icon-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--border-mid);
  background: rgba(0, 245, 212, 0.1);
}

.icon-btn.danger:hover {
  color: var(--accent-red);
  border-color: rgba(255, 71, 87, 0.3);
  background: rgba(255, 71, 87, 0.12);
}

.folder-tile {
  text-align: center;
}

.folder-activate-flash,
.folder-tech-corners,
.folder-scan,
.folder-grid-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.folder-activate-flash {
  opacity: 0;
  background: radial-gradient(circle at center, rgba(124, 230, 255, 0.34), rgba(0, 245, 212, 0.14) 35%, transparent 68%);
}

.folder-tech-corners {
  z-index: 1;
}

.folder-tech-corners .corner {
  position: absolute;
  width: 26px;
  height: 26px;
  border-color: rgba(0, 245, 212, 0.22);
  border-style: solid;
  opacity: 0.75;
  transition: all var(--transition-mid);
}

.folder-tech-corners .corner-tl {
  top: 9px;
  left: 9px;
  border-width: 2px 0 0 2px;
  border-top-left-radius: 10px;
}

.folder-tech-corners .corner-tr {
  top: 9px;
  right: 9px;
  border-width: 2px 2px 0 0;
  border-top-right-radius: 10px;
}

.folder-tech-corners .corner-bl {
  bottom: 9px;
  left: 9px;
  border-width: 0 0 2px 2px;
  border-bottom-left-radius: 10px;
}

.folder-tech-corners .corner-br {
  bottom: 9px;
  right: 9px;
  border-width: 0 2px 2px 0;
  border-bottom-right-radius: 10px;
}

.folder-scan,
.folder-grid-lines {
  opacity: 0;
  transition: opacity var(--transition-mid);
}

.folder-scan {
  background: linear-gradient(
    115deg,
    transparent 24%,
    rgba(0, 245, 212, 0.04) 40%,
    rgba(124, 230, 255, 0.18) 50%,
    rgba(0, 245, 212, 0.04) 60%,
    transparent 76%
  );
  transform: translateX(-130%);
}

.folder-grid-lines {
  background:
    linear-gradient(rgba(0, 245, 212, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 245, 212, 0.05) 1px, transparent 1px);
  background-size: 18px 18px;
  mix-blend-mode: screen;
}

.folder-tile:hover .folder-scan,
.folder-tile:hover .folder-grid-lines {
  opacity: 1;
}

.folder-tile:hover .folder-tech-corners .corner {
  border-color: rgba(124, 230, 255, 0.7);
  box-shadow: 0 0 10px rgba(0, 245, 212, 0.18);
}

.folder-tile:hover .corner-tl,
.folder-tile:hover .corner-br {
  transform: translate(1px, 1px);
}

.folder-tile:hover .corner-tr,
.folder-tile:hover .corner-bl {
  transform: translate(-1px, -1px);
}

.folder-tile:active .folder-activate-flash {
  animation: activate-flash 320ms ease-out;
}

.folder-tile:hover .folder-scan {
  animation: hologram-scan 1.4s ease-out forwards;
}

.folder-glyph {
  position: relative;
  margin-top: 22px;
  width: 100px;
  height: 94px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: folder-float 4.8s ease-in-out infinite;
}

.folder-pulse-ring {
  position: absolute;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  border: 1px solid rgba(0, 245, 212, 0.16);
  box-shadow: 0 0 18px rgba(0, 245, 212, 0.08);
  animation: pulse-ring 3.2s ease-in-out infinite;
}

.folder-core {
  width: 92px;
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 22px;
  color: #79d4ff;
  background: linear-gradient(180deg, rgba(0, 245, 212, 0.16), rgba(123, 44, 191, 0.12));
  border: 1px solid rgba(0, 245, 212, 0.22);
  box-shadow:
    inset 0 0 18px rgba(0, 245, 212, 0.08),
    0 0 18px rgba(0, 245, 212, 0.12);
  animation: core-breathe 3.4s ease-in-out infinite;
}

.folder-core svg {
  filter: drop-shadow(0 0 6px rgba(124, 230, 255, 0.35));
}

.folder-beam {
  position: absolute;
  display: block;
  width: 70px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 245, 212, 0.85), transparent);
  animation: beam-flicker 2.6s ease-in-out infinite;
}

.beam-a {
  top: 18px;
  left: -8px;
}

.beam-b {
  right: -8px;
  bottom: 20px;
}

.file-tile {
  text-align: center;
}

.folder-label-bar {
  width: 100%;
  display: flex;
  align-items: center;
  min-height: 34px;
  padding: 8px 2px 0;
  border-top: 1px solid rgba(0, 245, 212, 0.1);
  position: relative;
}

.folder-label-bar::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 2px;
  width: 42px;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 245, 212, 0.85), transparent);
}

.folder-title-name {
  text-align: left;
}

.folder-meta {
  color: #84c7d6;
}

.folder-tile:hover .folder-label-bar {
  border-top-color: rgba(124, 230, 255, 0.24);
}

.folder-tile:hover .folder-label-bar::before {
  width: 64px;
  background: linear-gradient(90deg, rgba(124, 230, 255, 0.95), transparent);
}

.folder-tile:hover .folder-title-name {
  color: #f2fbff;
}

.file-badge {
  margin-top: 8px;
  padding: 3px 8px;
  border: 1px solid;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.file-icon {
  margin-top: 22px;
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 10px currentColor);
}

.tile-name {
  width: 100%;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-primary);
  word-break: break-word;
}

.tile-meta {
  width: 100%;
  min-height: 30px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
}

.tile-status {
  margin-top: auto;
  font-family: var(--font-display);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.indexed {
  color: var(--accent-green);
}

.pending {
  color: var(--accent-amber);
}

.empty-state {
  grid-column: 1 / -1;
  min-height: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px 24px;
  border: 1px solid rgba(0, 245, 212, 0.12);
  border-radius: 24px;
  background:
    radial-gradient(circle at center, rgba(0, 245, 212, 0.08), transparent 42%),
    linear-gradient(180deg, rgba(8, 13, 24, 0.96), rgba(4, 8, 16, 0.98));
  position: relative;
  overflow: hidden;
}

.empty-state::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent, rgba(0, 245, 212, 0.05), transparent),
    radial-gradient(circle at top, rgba(123, 44, 191, 0.14), transparent 32%);
  pointer-events: none;
}

.empty-core-shell {
  position: relative;
  width: 250px;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 245, 212, 0.12);
  box-shadow: inset 0 0 18px rgba(0, 245, 212, 0.04);
}

.orbit-outer {
  width: 250px;
  height: 250px;
}

.orbit-inner {
  width: 184px;
  height: 184px;
  border-color: rgba(0, 245, 212, 0.18);
}

.empty-scanline {
  position: absolute;
  width: 180px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 245, 212, 0.9), transparent);
  box-shadow: 0 0 12px rgba(0, 245, 212, 0.5);
  animation: float 3s ease-in-out infinite;
}

.empty-core-glow {
  position: absolute;
  width: 126px;
  height: 126px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 245, 212, 0.16), rgba(123, 44, 191, 0.08), transparent 70%);
  filter: blur(6px);
}

.empty-folder-chamber {
  position: relative;
  width: 124px;
  height: 124px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: folder-float 5.4s ease-in-out infinite;
}

.empty-folder-plate {
  position: absolute;
  inset: 14px;
  border-radius: 28px;
  border: 1px solid rgba(0, 245, 212, 0.22);
  background: linear-gradient(180deg, rgba(0, 245, 212, 0.14), rgba(123, 44, 191, 0.14));
  box-shadow:
    inset 0 0 24px rgba(0, 245, 212, 0.08),
    0 0 32px rgba(0, 245, 212, 0.12);
}

.empty-folder-pulse {
  position: absolute;
  width: 138px;
  height: 138px;
  border-radius: 50%;
  border: 1px solid rgba(0, 245, 212, 0.14);
  box-shadow: 0 0 22px rgba(0, 245, 212, 0.08);
  animation: pulse-ring 3.6s ease-in-out infinite;
}

.empty-folder-icon-wrap {
  position: relative;
  z-index: 1;
  width: 92px;
  height: 92px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #7ce6ff;
  background: rgba(3, 10, 18, 0.72);
  border: 1px solid rgba(0, 245, 212, 0.16);
  box-shadow: 0 0 24px rgba(0, 245, 212, 0.16);
  animation: core-breathe 3.8s ease-in-out infinite;
}

.empty-folder-icon-wrap svg {
  filter: drop-shadow(0 0 8px rgba(124, 230, 255, 0.45));
}

.empty-beam {
  position: absolute;
  width: 78px;
  height: 1px;
  top: 50%;
  transform: translateY(-50%);
  background: linear-gradient(90deg, transparent, rgba(0, 245, 212, 0.95), transparent);
  animation: beam-flicker 2.4s ease-in-out infinite;
}

.beam-left {
  left: -34px;
}

.beam-right {
  right: -34px;
}

.empty-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  max-width: 560px;
}

.empty-kicker {
  color: var(--accent-cyan);
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.empty-title {
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.empty-sub {
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.8;
}

.empty-actions {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.empty-cta {
  min-width: 188px;
  justify-content: center;
}

@keyframes folder-float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
}

@keyframes core-breathe {
  0%, 100% {
    transform: scale(1);
    opacity: 0.92;
  }
  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@keyframes pulse-ring {
  0%, 100% {
    transform: scale(0.92);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.06);
    opacity: 0.78;
  }
}

@keyframes beam-flicker {
  0%, 100% {
    opacity: 0.35;
    transform: translateY(-50%) scaleX(0.92);
  }
  50% {
    opacity: 1;
    transform: translateY(-50%) scaleX(1.06);
  }
}

@keyframes hologram-scan {
  0% {
    transform: translateX(-130%);
    opacity: 0;
  }
  20% {
    opacity: 0.55;
  }
  100% {
    transform: translateX(130%);
    opacity: 0;
  }
}

@keyframes activate-flash {
  0% {
    opacity: 0;
    transform: scale(0.92);
  }
  35% {
    opacity: 0.95;
    transform: scale(1.03);
  }
  100% {
    opacity: 0;
    transform: scale(1.08);
  }
}

.folder-tile:hover .folder-glyph,
.folder-tile:hover .empty-folder-chamber {
  animation-duration: 2.3s;
}

.folder-tile:hover .folder-core,
.folder-tile:hover .folder-pulse-ring,
.folder-tile:hover .empty-folder-icon-wrap,
.folder-tile:hover .empty-folder-pulse {
  animation-duration: 2s;
}

.folder-tile:hover .folder-beam,
.folder-tile:hover .empty-beam {
  animation-duration: 1.2s;
}

@media (prefers-reduced-motion: reduce) {
  .folder-glyph,
  .folder-pulse-ring,
  .folder-core,
  .folder-beam,
  .folder-scan,
  .folder-tech-corners .corner,
  .empty-folder-chamber,
  .empty-folder-pulse,
  .empty-folder-icon-wrap,
  .empty-beam {
    animation: none !important;
  }
}

@media (max-width: 700px) {
  .explorer-grid {
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 14px;
  }

  .explorer-tile {
    min-height: 204px;
    padding: 16px 14px 14px;
  }

  .folder-glyph {
    width: 90px;
    height: 84px;
    margin-top: 18px;
  }

  .folder-pulse-ring {
    width: 96px;
    height: 96px;
  }

  .folder-core {
    width: 84px;
    height: 72px;
  }

  .empty-core-shell {
    width: 210px;
    height: 210px;
  }

  .orbit-outer {
    width: 210px;
    height: 210px;
  }

  .orbit-inner {
    width: 156px;
    height: 156px;
  }

  .empty-title {
    font-size: 18px;
    letter-spacing: 0.12em;
  }
}

.spin {
  animation: spin 1s linear infinite;
}

.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 400px;
  max-width: 90vw;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.document-dialog {
  width: min(860px, 92vw);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}

.dialog-header h3 {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-panel);
}

.dialog-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  margin-bottom: 16px;
  box-sizing: border-box;
}

.dialog-input:focus {
  border-color: var(--accent-cyan);
  outline: none;
}

.dialog-body {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 16px 0;
  line-height: 1.5;
}

.dialog-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.document-info-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  margin-bottom: 14px;
}

.document-preview {
  min-height: 360px;
  max-height: 62vh;
  overflow: auto;
  background: rgba(3, 5, 10, 0.7);
  border: 1px solid var(--border-dim);
  border-radius: 14px;
  padding: 16px;
}

.document-preview pre {
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}

.preview-loading {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 11px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:hover {
  border-color: var(--border-mid);
  background: var(--bg-card-hover);
}

.btn.primary {
  background: var(--accent-cyan-dim);
  border-color: rgba(0, 245, 212, 0.3);
  color: var(--accent-cyan);
}

.btn.primary:hover {
  background: rgba(0, 245, 212, 0.2);
  box-shadow: var(--glow-cyan);
}

.btn.danger {
  background: rgba(255, 71, 87, 0.1);
  border-color: rgba(255, 71, 87, 0.3);
  color: var(--accent-red);
}

.btn.danger:hover {
  background: rgba(255, 71, 87, 0.2);
  box-shadow: 0 0 12px rgba(255, 71, 87, 0.2);
}

@media (max-width: 900px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }

  .toolbar-right {
    display: flex;
    justify-content: flex-start;
  }
}
</style>
