/**
 * File Viewer — Styles
 * Dark theme, mobile-first, Telegram WebApp adapted.
 */

/* ─── Theme variables ─────────────────────────────────────────────────────── */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --border-subtle: rgba(48, 54, 61, 0.5);
  --text-primary: #e6edf3;
  --text-secondary: #7d8590;
  --text-tertiary: #484f58;
  --accent: #58a6ff;
  --accent-subtle: rgba(88, 166, 255, 0.15);
  --success: #3fb950;
  --success-subtle: rgba(63, 185, 80, 0.15);
  --warning: #d29922;
  --warning-subtle: rgba(210, 153, 34, 0.15);
  --danger: #f85149;
  --danger-subtle: rgba(248, 81, 73, 0.15);
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 20px;
  --transition: 200ms ease;
  --touch-min: 44px;
}

/* ─── Reset ───────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}
body { min-height: 100vh; overflow-x: hidden; }
button { font-family: inherit; font-size: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ─── Layout ──────────────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 100vw;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: var(--touch-min);
}

.header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-min);
  height: var(--touch-min);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.header-btn:active { background: var(--bg-tertiary); color: var(--text-primary); }

/* ─── Breadcrumb ──────────────────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  white-space: nowrap;
  flex: 1;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.breadcrumb::-webkit-scrollbar { display: none; }

.breadcrumb-segment {
  color: var(--text-secondary);
  padding: 4px 6px;
  border-radius: 6px;
  font-size: 13px;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  flex-shrink: 0;
}
.breadcrumb-segment:hover,
.breadcrumb-segment:active { background: var(--bg-tertiary); color: var(--text-primary); }
.breadcrumb-segment.current { color: var(--text-primary); font-weight: 600; cursor: default; }
.breadcrumb-segment.current:hover { background: transparent; }
.breadcrumb-sep { color: var(--text-tertiary); font-size: 12px; flex-shrink: 0; }

/* ─── Toolbar ─────────────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.search-wrap {
  flex: 1;
  position: relative;
}
.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}
.search-input {
  width: 100%;
  height: 36px;
  padding: 0 12px 0 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition);
}
.search-input::placeholder { color: var(--text-tertiary); }
.search-input:focus { border-color: var(--accent); }

.toolbar-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.sort-btn, .toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.sort-btn.active, .toggle-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-subtle);
}
.sort-btn:active, .toggle-btn:active { transform: scale(0.95); }

/* ─── Content ─────────────────────────────────────────────────────────────── */
.content {
  flex: 1;
  padding: 8px;
}

/* ─── File list ───────────────────────────────────────────────────────────── */
.file-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition);
  min-height: var(--touch-min);
}
.file-item:active { background: var(--bg-tertiary); }

.file-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 16px;
  flex-shrink: 0;
}

/* Icon color variants */
.icon-folder { background: var(--accent-subtle); color: var(--accent); }
.icon-js { background: var(--warning-subtle); color: var(--warning); }
.icon-json { background: var(--warning-subtle); color: #e3b341; }
.icon-md { background: var(--accent-subtle); color: #79c0ff; }
.icon-html { background: var(--danger-subtle); color: var(--danger); }
.icon-css { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.icon-image { background: var(--success-subtle); color: var(--success); }
.icon-config { background: rgba(136, 136, 136, 0.15); color: #888; }
.icon-text { background: rgba(136, 136, 136, 0.1); color: var(--text-secondary); }
.icon-binary { background: rgba(136, 136, 136, 0.1); color: var(--text-tertiary); }

.file-info {
  flex: 1;
  min-width: 0;
}
.file-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.file-chevron {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* ─── File viewer ─────────────────────────────────────────────────────────── */
.file-view {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.file-view-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}
.file-view-header .file-icon { width: 40px; height: 40px; font-size: 20px; }
.file-view-title { font-size: 16px; font-weight: 600; word-break: break-all; }
.file-view-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

.code-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-scroll {
  overflow-x: auto;
  overflow-y: visible;
}

.code-table {
  display: table;
  width: 100%;
  border-collapse: collapse;
}

.code-line {
  display: table-row;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.line-number {
  display: table-cell;
  width: 48px;
  min-width: 48px;
  padding: 0 12px 0 8px;
  text-align: right;
  color: var(--text-tertiary);
  user-select: none;
  white-space: nowrap;
  border-right: 1px solid var(--border);
  position: sticky;
  left: 0;
  background: var(--bg-secondary);
}

.line-content {
  display: table-cell;
  padding: 0 16px;
  white-space: pre;
}

/* Override highlight.js background */
.code-container .hljs {
  background: transparent !important;
  padding: 0 !important;
}

.load-more-wrap {
  padding: 16px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--accent-subtle);
  color: var(--accent);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 13px;
  transition: all var(--transition);
  min-height: var(--touch-min);
}
.load-more-btn:active { transform: scale(0.97); background: rgba(88, 166, 255, 0.25); }

/* ─── Image preview ───────────────────────────────────────────────────────── */
.image-preview {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.image-preview img {
  max-width: 100%;
  max-height: 60vh;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

/* ─── States ──────────────────────────────────────────────────────────────── */
.skeleton-list { display: flex; flex-direction: column; gap: 2px; }
.skeleton-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  min-height: var(--touch-min);
}
.skeleton-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  animation: pulse 1.5s ease-in-out infinite;
}
.skeleton-text {
  height: 14px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  animation: pulse 1.5s ease-in-out infinite;
}
.skeleton-text-short { width: 40%; }
.skeleton-text-long { width: 70%; }
.skeleton-lines { display: flex; flex-direction: column; gap: 6px; flex: 1; }

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

.empty-state, .error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
  gap: 12px;
}
.empty-state-icon, .error-state-icon {
  font-size: 48px;
  opacity: 0.4;
}
.empty-state-text { color: var(--text-secondary); font-size: 15px; }

.error-state-text { color: var(--text-secondary); font-size: 15px; }
.retry-btn {
  margin-top: 8px;
  padding: 10px 24px;
  background: var(--danger-subtle);
  color: var(--danger);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 13px;
  min-height: var(--touch-min);
  transition: all var(--transition);
}
.retry-btn:active { transform: scale(0.97); }

/* ─── Telegram WebApp adaptation ──────────────────────────────────────────── */
body.tg-adapted .header { background: var(--tg-theme-secondary-bg-color, var(--bg-secondary)); }

/* ─── Markdown rendered view ──────────────────────────────────────────────── */
.markdown-body {
  padding: 16px 20px;
  line-height: 1.7;
  color: var(--text-primary, #e6edf3);
  font-size: 15px;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.markdown-body h1 { font-size: 1.6em; margin: 24px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--border, #30363d); }
.markdown-body h2 { font-size: 1.35em; margin: 20px 0 10px; padding-bottom: 4px; border-bottom: 1px solid var(--border, #30363d); }
.markdown-body h3 { font-size: 1.15em; margin: 16px 0 8px; }
.markdown-body h4, .markdown-body h5, .markdown-body h6 { font-size: 1em; margin: 12px 0 6px; color: var(--text-secondary, #7d8590); }
.markdown-body p { margin: 0 0 12px; }
.markdown-body ul, .markdown-body ol { padding-left: 24px; margin: 0 0 12px; }
.markdown-body li { margin-bottom: 4px; }
.markdown-body li > ul, .markdown-body li > ol { margin-bottom: 0; }
.markdown-body strong { color: #fff; font-weight: 600; }
.markdown-body em { color: var(--text-secondary, #7d8590); }
.markdown-body a { color: var(--accent, #58a6ff); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }
.markdown-body code {
  background: var(--bg-tertiary, #21262d);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: 'SF Mono', SFMono-Regular, Consolas, monospace;
}
.markdown-body pre {
  background: var(--bg-tertiary, #21262d);
  padding: 12px 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0 0 12px;
}
.markdown-body pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.5;
}
.markdown-body blockquote {
  border-left: 3px solid var(--accent, #58a6ff);
  margin: 0 0 12px;
  padding: 4px 16px;
  color: var(--text-secondary, #7d8590);
}
.markdown-body table { width: 100%; border-collapse: collapse; margin: 0 0 12px; }
.markdown-body th, .markdown-body td { padding: 8px 12px; border: 1px solid var(--border, #30363d); text-align: left; font-size: 13px; }
.markdown-body th { background: var(--bg-tertiary, #21262d); font-weight: 600; }
.markdown-body hr { border: none; border-top: 1px solid var(--border, #30363d); margin: 16px 0; }
.markdown-body img { max-width: 100%; border-radius: 8px; }

/* ─── PDF embed ───────────────────────────────────────────────────────────── */
.pdf-preview { padding: 8px; }

/* ─── PDF rendered pages ──────────────────────────────────────────────────── */
.pdf-page-count { text-align: center; color: var(--text-secondary, #7d8590); font-size: 13px; margin-bottom: 12px; }
.pdf-page { display: block; margin: 0 auto 12px; border-radius: 4px; background: #fff; }