@import url('https://fonts.googleapis.com/css2?family=Courier+Prime:ital,wght@0,400;0,700;1,400&family=Space+Mono:wght@400;700&display=swap');

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

html, body { height: 100%; overflow: hidden; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 14px;
  display: flex;
  flex-direction: column;
  transition: background 0.2s, color 0.2s;
}

/* ── FONTS ─────────────────────────────────────────────── */
:root {
  --mono: 'Space Mono', monospace;
  --serif: 'Courier Prime', monospace;
}

/* ── HEADER ─────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}

.logo {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
}

.logo span { color: var(--text3); }

.search-wrap {
  flex: 1;
  position: relative;
  max-width: 480px;
}

.search-wrap input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--serif);
  font-size: 13px;
  padding: 7px 12px 7px 32px;
  outline: none;
  transition: border-color 0.2s;
}

.search-wrap input:focus { border-color: var(--accent); }
.search-wrap input::placeholder { color: var(--text3); }

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text3);
  font-size: 12px;
  pointer-events: none;
}

.header-actions { display: flex; gap: 8px; margin-left: auto; align-items: center; }

/* ── THEME TOGGLE ───────────────────────────────────────── */
.theme-toggle {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { border-color: var(--accent); color: var(--accent); }
.btn.primary:hover { background: var(--accent); color: var(--bg); }
.btn.danger:hover { border-color: var(--danger); color: var(--danger); }

/* ── STATS ───────────────────────────────────────────────── */
.stats {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* ── LAYOUT ──────────────────────────────────────────────── */
.layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── SIDEBAR ─────────────────────────────────────────────── */
.sidebar {
  width: 300px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.sidebar-filters {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 6px;
}

.filter-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn.active { background: var(--bg3); color: var(--text); border-color: var(--border2); }
.filter-btn.claude.active { border-color: var(--claude); color: var(--claude); }
.filter-btn.chatgpt.active { border-color: var(--chatgpt); color: var(--chatgpt); }

.conv-list {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}

.conv-item {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
  position: relative;
}

.conv-item:hover { background: var(--bg2); }
.conv-item.active { background: var(--bg3); }
.conv-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
}

.conv-source {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.conv-source.claude { color: var(--claude); }
.conv-source.chatgpt { color: var(--chatgpt); }

.conv-title {
  font-size: 12px;
  color: var(--text);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.conv-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
}

.highlight { background: var(--highlight); color: var(--accent); }

/* ── MAIN CONTENT ────────────────────────────────────────── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.conv-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex-shrink: 0;
}

.conv-header-info { flex: 1; }

.conv-header-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.conv-header-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
}

.conv-header-actions { display: flex; gap: 6px; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.message-role {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.message-role.user { color: var(--accent); }
.message-role.assistant { color: var(--accent2); }

.message-body {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  position: relative;
  cursor: pointer;
  transition: border-color 0.15s;
}

.message-body:hover { border-color: var(--border2); }
.message-body:hover .copy-hint { opacity: 1; }

.copy-hint {
  position: absolute;
  top: 6px; right: 8px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--text3);
  opacity: 0;
  transition: opacity 0.15s;
  text-transform: uppercase;
}

.message-body.copied { border-color: var(--accent2); }

/* ── EMPTY STATE ─────────────────────────────────────────── */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px;
  text-align: center;
}

.empty-ascii {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  line-height: 1.4;
  letter-spacing: 0.05em;
}

.empty-title {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.empty-sub {
  font-size: 12px;
  color: var(--text3);
  line-height: 1.6;
  max-width: 340px;
}

.drop-zone {
  border: 1px dashed var(--border2);
  padding: 28px 40px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--drop-hover);
}

.drop-zone-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.drop-zone-sub { font-size: 11px; color: var(--text3); }

/* ── NO SELECTION ────────────────────────────────────────── */
.no-selection {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text3);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── TOAST ───────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg3);
  border: 1px solid var(--accent2);
  color: var(--accent2);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 16px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.2s;
  pointer-events: none;
  z-index: 100;
}

.toast.show { opacity: 1; transform: translateY(0); }

/* ── SEARCH RESULTS ──────────────────────────────────────── */
.search-results-header {
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}

.no-results {
  padding: 30px 14px;
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: 0.08em;
}

/* ── MODAL ───────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 50;
  align-items: center;
  justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--border2);
  padding: 28px;
  width: 480px;
  max-width: 90vw;
}

.modal-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.import-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border: 1px solid var(--border2);
}

.import-tab {
  flex: 1;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  transition: all 0.15s;
  border-right: 1px solid var(--border2);
}

.import-tab:last-child { border-right: none; }
.import-tab.active.claude { background: var(--import-claude); color: var(--claude); }
.import-tab.active.chatgpt { background: var(--import-chatgpt); color: var(--chatgpt); }

.import-instructions {
  font-size: 12px;
  color: var(--text2);
  line-height: 1.65;
  margin-bottom: 16px;
}

.import-instructions code {
  background: var(--bg3);
  padding: 1px 5px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}

.modal-drop {
  border: 1px dashed var(--border2);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 16px;
}

.modal-drop:hover, .modal-drop.drag-over {
  border-color: var(--accent);
  background: var(--drop-hover);
}

.modal-drop-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.modal-drop-sub { font-size: 11px; color: var(--text3); }

.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ── PROGRESS ────────────────────────────────────────────── */
.progress-bar {
  height: 2px;
  background: var(--border);
  margin-bottom: 12px;
  overflow: hidden;
  display: none;
}

.progress-bar.show { display: block; }

.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.3s;
}

.progress-text {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: none;
}

.progress-text.show { display: block; }

/* ── CONTEXT PANEL ───────────────────────────────────────── */
.context-panel {
  border-top: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  background: var(--bg2);
}

.context-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.context-preview {
  flex: 1;
  font-size: 11px;
  color: var(--text2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-style: italic;
}

input[type="file"] { display: none; }