/* ============================================================
   Enron Corpus Browser — light theme
   ============================================================ */

:root {
  --bg:              #f5f5f5;
  --surface:         #ffffff;
  --surface2:        #f5f5f5;
  --border:          #e0e0e0;
  --accent:          #007bc2;
  --accent2:         #005a96;
  --enron-blue:      #007bc2;
  --enron-green:     #009655;
  --enron-red:       #df0032;
  --text:            #111111;
  --muted:           #6b6b6b;
  --selected:        #f5f5f5;
  --radius:          4px;
  --mobile-nav-h:    36px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Courier New', Courier, monospace;
  font-size: 13px;
  line-height: 1.5;
  overflow: hidden;
}

/* ============================================================
   App three-column grid
   ============================================================ */

#app {
  display: grid;
  grid-template-columns: 200px 200px 1fr;
  height: 100vh;
  overflow: hidden;
}

/* ============================================================
   Employee sidebar
   ============================================================ */

#employee-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface);
}

#employee-panel-header {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  min-height: 36px;
}

#emp-filter-bar {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

#employee-panel-header > span {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--muted);
}

#emp-filter {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 8px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 11px;
  line-height: 1.5;
  outline: none;
  width: 100%;
  box-sizing: border-box;
}

#emp-filter:focus {
  border-color: var(--border);
}

#list-filter-bar {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

#inbox-filter {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 8px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 11px;
  line-height: 1.5;
  outline: none;
  box-sizing: border-box;
}

#inbox-filter:focus {
  border-color: var(--border);
}

#employee-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.emp-item {
  padding: 0;
}

.emp-summary {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--text);
  font-size: 12px;
  user-select: none;
  list-style: none;
  transition: background 0.1s;
}

.emp-summary:hover { background: var(--surface2); }

.emp-summary.active-emp {
  color: var(--text);
  background: var(--selected);
}

.emp-summary.active-emp .emp-arrow,
.emp-summary.active-emp .emp-count {
  color: var(--muted);
}

.emp-arrow {
  font-size: 9px;
  color: var(--muted);
  flex-shrink: 0;
  width: 10px;
  transition: transform 0.15s;
}

details.emp-open > .emp-summary .emp-arrow { transform: rotate(90deg); }

.emp-count {
  margin-left: auto;
  color: var(--muted);
  font-size: 10px;
}

.emp-folders {
  padding: 0 0 4px 0;
}

.folder-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 28px;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.folder-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-count {
  flex-shrink: 0;
  color: var(--muted);
  font-size: 10px;
}

.folder-link:hover { color: var(--text); background: var(--surface2); }

.folder-link.active-folder {
  color: var(--text);
  background: var(--selected);
}

.loading-msg {
  padding: 16px;
  color: var(--muted);
  font-size: 11px;
}

/* ============================================================
   Email list panel
   ============================================================ */

#list-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface);
}

#list-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  height: 36px;
  overflow: hidden;
}

#list-title {
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--muted);
  text-transform: uppercase;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

#list-count {
  display: none;
}

#email-rows {
  flex: 1;
  overflow-y: auto;
}

#list-empty {
  padding: 24px 16px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

.email-row {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.08s;
}

.email-row:hover { background: var(--surface2); }

.email-row.active {
  background: var(--selected);
}


.email-row-top {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin-bottom: 2px;
}

.email-row-sender {
  font-size: 12px;
  font-weight: bold;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-row-date {
  font-size: 10px;
  color: var(--muted);
  flex-shrink: 0;
  white-space: nowrap;
}

.email-row-subject {
  font-size: 11px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-row-preview {
  font-size: 10px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 1px;
}

#load-more-sentinel {
  height: 1px;
}

/* ============================================================
   Detail panel (email + network tabs)
   ============================================================ */

#detail-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
}

#tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  min-height: 36px;
  align-items: stretch;
}

.tab-btn {
  display: flex;
  align-items: center;
  padding: 0 20px;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  line-height: 1.5;
  transition: color 0.1s, background 0.1s;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); }

.tab-pane {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.tab-pane.hidden { display: none; }

/* ---- Email view ---- */

#tab-email {
  overflow-y: auto;
}

#email-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  gap: 12px;
}

#email-content {
  padding: 20px 24px;
}

#email-subject {
  font-size: 16px;
  color: var(--enron-blue);
  margin-bottom: 14px;
  line-height: 1.3;
  word-break: break-word;
}

#email-headers-table {
  border-collapse: collapse;
  font-size: 12px;
  margin-bottom: 20px;
  width: 100%;
}

#email-headers-table td {
  padding: 2px 8px 2px 0;
  vertical-align: top;
}

#email-headers-table td:first-child {
  color: var(--muted);
  width: 60px;
  flex-shrink: 0;
}

#email-headers-table td:last-child {
  color: var(--text);
  word-break: break-all;
}

.hdr-email-link {
  cursor: pointer;
  text-decoration: none;
}
.hdr-email-link.emp { color: var(--enron-red); }
.hdr-email-link.ext { color: var(--enron-green); }
.hdr-email-link:hover { text-decoration: underline; }

#email-body {
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

/* ---- Network view ---- */

#tab-network {
  overflow: hidden;
}

#graph-reload-btn {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 0.7;
}

#graph-reload-btn:hover {
  background: var(--surface2);
  opacity: 1;
}


#network-canvas {
  flex: 1;
  overflow: hidden;
  background: var(--bg);
  position: relative;
}

#graph-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
}

#graph-loading.hidden { display: none; }

/* ============================================================
   Toast notifications
   ============================================================ */

#toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 20px;
  border-radius: var(--radius);
  font-size: 12px;
  z-index: 200;
  transition: opacity 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

#toast.hidden { display: none; }

/* ============================================================
   Scrollbar styling — hidden, scrolling still works
   ============================================================ */

* {
  scrollbar-width: none;      /* Firefox */
  -ms-overflow-style: none;   /* old Edge/IE */
}
::-webkit-scrollbar { width: 0; height: 0; }

/* ============================================================
   Utilities
   ============================================================ */

.hidden { display: none !important; }

/* ---- About view ---- */

#tab-about {
  overflow-y: auto;
  padding: 36px 44px;
  gap: 16px;
}

#intro-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  margin-bottom: 4px;
}

#intro-logo-img {
  /* Width is set in JS (sync_logo_width) to match #intro-stats' actual
     rendered width exactly — a % here drifts from that text row's
     content-based width as the container resizes. */
  height: auto;
}

#intro-tagline {
  font-size: 12px;
  font-style: italic;
  color: var(--text);
}

#tab-about a {
  color: var(--enron-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

#tab-about a:hover {
  border-bottom-color: var(--enron-blue);
}

#intro-body {
  font-size: 12px;
  color: var(--text);
  line-height: 1.75;
}

#intro-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  padding: 12px 0;
  /* Shrink-to-fit + self-center, not stretch — #tab-about is a column flex
     container, so without this #intro-stats defaults to full tab width and
     its offsetWidth (read in sync_logo_width) would match that instead of
     the actual "517,401 / 150 / 79,894" text width. */
  width: fit-content;
  align-self: center;
}

.intro-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2px;
}

.intro-stat-n {
  font-size: 20px;
  font-weight: bold;
  color: var(--enron-blue);
  letter-spacing: 1px;
}

.intro-stat-n.red   { color: var(--enron-red); }
.intro-stat-n.green { color: var(--enron-green); }

.intro-stat-l {
  font-size: 12px;
  color: var(--text);
  text-transform: capitalize;
}

.intro-section-body {
  font-size: 12px;
  color: var(--text);
  line-height: 1.75;
}

/* ============================================================
   Mobile bottom nav (hidden on desktop)
   ============================================================ */

#mobile-nav {
  display: none;
}

/* ============================================================
   Responsive — mobile (≤ 768px)
   ============================================================ */

@media (max-width: 768px) {
  html, body { overflow: hidden; }

  #app {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    position: relative;
    height: calc(100vh - var(--mobile-nav-h));
  }

  /* All panels stack and hide by default */
  #employee-panel,
  #list-panel,
  #detail-panel {
    position: absolute;
    inset: 0;
    display: none;
    width: 100%;
    height: 100%;
  }

  /* The active mobile panel is shown */
  #employee-panel.mobile-active,
  #list-panel.mobile-active,
  #detail-panel.mobile-active {
    display: flex;
  }

  /* File Browser mode: employee sidebar + email list side by side instead
     of full-screen. left+right only, no explicit width — that's the exact
     split point twice with no third value to ever conflict with it. */
  #app.mobile-split #employee-panel.mobile-active,
  #app.mobile-split #list-panel.mobile-active {
    width: auto;
    top: 0;
    bottom: 0;
  }
  #app.mobile-split #employee-panel.mobile-active { left: 0;   right: 50%; }
  #app.mobile-split #list-panel.mobile-active     { left: 50%; right: 0;   }

  #mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--mobile-nav-h);
    background: var(--surface);
    border-top: 1px solid var(--border);
    z-index: 100;
  }

  #mobile-employees-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
  }

  #mobile-employees-btn.active {
    font-weight: bold;
  }

  /* About view smaller on mobile */
  #tab-about { padding: 24px 20px; gap: 14px; }
  #intro-stats { gap: 16px; flex-wrap: wrap; }
  .intro-stat-n { font-size: 16px; }
}