/* ═══════════════════════════════════════════════════════════════
   OpenChat – Main Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ── Reset & variables ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary:    #0d0d0d;
  --bg-secondary:  #171717;
  --bg-hover:      #212121;
  --bg-active:     #2a2a2a;
  --bg-input:      #1e1e1e;
  --border:        #2e2e2e;
  --text-primary:  #ececec;
  --text-secondary:#9a9a9a;
  --text-muted:    #5c5c5c;
  --accent:        #10a37f;
  --accent-hover:  #0d8a6c;
  --accent-dim:    rgba(16,163,127,.15);
  --danger:        #ef4444;
  --danger-hover:  #dc2626;
  --sidebar-w:     280px;
  --radius:        8px;
  --radius-sm:     5px;
  --transition:    .15s ease;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

/* ── Layout ─────────────────────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition);
}

#sidebar.collapsed {
  width: 0;
  min-width: 0;
  border-right: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

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

#btn-new-chat, #btn-clear-dir-filter {
  display: flex;
  align-items: center;
  gap: 8px;
  width: calc(100% - 32px);
  margin: 12px 16px 6px;
  padding: 9px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition);
  flex-shrink: 0;
}
#btn-new-chat:hover { background: var(--accent-hover); }
#btn-new-chat svg { flex-shrink: 0; }

/* Search */
.sidebar-search {
  padding: 6px 16px 10px;
  flex-shrink: 0;
}
.sidebar-search input {
  width: 100%;
  padding: 7px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}
.sidebar-search input::placeholder { color: var(--text-muted); }
.sidebar-search input:focus { border-color: var(--accent); }

/* Scrollable content */
#sidebar-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-bottom: 16px;
}
#sidebar-content::-webkit-scrollbar { width: 4px; }
#sidebar-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Section headings */
.sidebar-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 5px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--text-muted);
}
.sidebar-section-title button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  line-height: 1;
  font-size: 16px;
  transition: color var(--transition);
}
.sidebar-section-title button:hover { color: var(--text-primary); }

/* ── Directories ────────────────────────────────────────────────── */
.dir-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px 6px 16px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  margin: 0 8px;
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  user-select: none;
}
.dir-item:hover   { background: var(--bg-hover); color: var(--text-primary); }
.dir-item.active  { background: var(--bg-active); color: var(--text-primary); }

.dir-toggle {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--text-muted);
}
.dir-toggle.open { transform: rotate(90deg); }
.dir-icon { flex-shrink: 0; color: var(--text-muted); }
.dir-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dir-actions {
  display: none;
  gap: 2px;
}
.dir-item:hover .dir-actions { display: flex; }
.dir-actions button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 2px;
  border-radius: 3px;
  line-height: 1;
  transition: color var(--transition);
}
.dir-actions button:hover { color: var(--text-primary); }

.dir-children { padding-left: 14px; }

/* ── Tags ───────────────────────────────────────────────────────── */
.tag-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 16px;
  margin: 0 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.tag-item:hover  { background: var(--bg-hover); color: var(--text-primary); }
.tag-item.active { background: var(--bg-active); color: var(--text-primary); }

.tag-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}
.tag-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tag-count {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-active);
  padding: 1px 6px;
  border-radius: 20px;
}

/* ── Conversation list ──────────────────────────────────────────── */
.conv-item {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  margin: 0 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  min-height: 42px;
  gap: 8px;
}
.conv-item:hover   { background: var(--bg-hover); }
.conv-item.active  { background: var(--bg-active); }

.conv-body { flex: 1; overflow: hidden; }
.conv-title {
  font-size: 13.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}
.conv-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.conv-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 0 5px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 500;
  background: var(--bg-active);
}
.conv-actions {
  display: none;
  gap: 2px;
}
.conv-item:hover .conv-actions { display: flex; }
.conv-actions button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: 4px;
  line-height: 1;
  transition: color var(--transition);
}
.conv-actions button:hover         { color: var(--text-primary); }
.conv-actions button.delete:hover  { color: var(--danger); }

/* ── Main chat area ─────────────────────────────────────────────── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
}

/* Top bar */
#topbar {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

#btn-toggle-sidebar {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  line-height: 1;
}
#btn-toggle-sidebar:hover { color: var(--text-primary); }

#conv-title-display {
  flex: 1;
  font-size: 15px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#dir-filter-indicator {
  max-width: calc(100% - 32px);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(16,163,127,.35);
  border-radius: 999px;
  padding: 4px 10px;
  margin: 12px 16px 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#model-select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  font-size: 12px;
  cursor: pointer;
  outline: none;
  max-width: 220px;
}
#model-select:focus { border-color: var(--accent); }

#assistant-select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  font-size: 12px;
  cursor: pointer;
  outline: none;
  max-width: 220px;
}
#assistant-select:focus { border-color: var(--accent); }

.assistant-debug-badge {
  font-size: 11px;
  border-radius: 999px;
  padding: 3px 9px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.assistant-debug-badge.applied {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(16,163,127,.35);
}

.assistant-debug-badge.not-applied {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.35);
}

.user-badge {
  font-size: 11px;
  border-radius: 999px;
  padding: 3px 9px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition);
}

.user-badge:hover {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.10);
}

.credit-balance-badge {
  font-size: 11px;
  border-radius: 999px;
  padding: 3px 9px;
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.14);
  white-space: nowrap;
}

.credit-query-cost-badge {
  font-size: 11px;
  border-radius: 999px;
  padding: 3px 9px;
  border: 1px solid rgba(16, 163, 127, 0.35);
  color: var(--accent);
  background: var(--accent-dim);
  white-space: nowrap;
}

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

.topbar-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  transition: all var(--transition);
  white-space: nowrap;
}
.topbar-btn:hover { border-color: var(--text-secondary); color: var(--text-primary); }

/* ── Messages ───────────────────────────────────────────────────── */
#messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
}
#messages-container::-webkit-scrollbar { width: 5px; }
#messages-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

#messages-list {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Empty state */
#empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 40px;
  pointer-events: none;
}
#empty-state h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-secondary);
}
#empty-state p { font-size: 14px; }

/* Message bubbles */
.message {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.message.user  { align-items: flex-end; }
.message.assistant { align-items: flex-start; }

.message-bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 14.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}
.message.user .message-bubble {
  background: var(--accent-dim);
  border: 1px solid rgba(16,163,127,.25);
  border-bottom-right-radius: 4px;
}
.message.assistant .message-bubble {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.message-time {
  font-size: 11px;
  color: var(--text-muted);
  padding: 0 4px;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.message-download-btn {
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
  line-height: 1.4;
  cursor: pointer;
  transition: all var(--transition);
}

.message-download-btn:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.message-export-actions {
  display: inline-flex;
  position: relative;
}

.message-export-menu {
  position: relative;
}

.message-export-menu summary {
  list-style: none;
}

.message-export-menu summary::-webkit-details-marker {
  display: none;
}

.message-export-menu[open] > .message-download-btn {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.message-export-list {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  min-width: 170px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-secondary);
  box-shadow: 0 8px 24px rgba(0,0,0,.16);
  overflow: hidden;
  z-index: 8;
}

.message-export-list button {
  border: 0;
  border-top: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 10px;
  text-align: left;
  font-size: 12px;
  cursor: pointer;
}

.message-export-list button:first-child {
  border-top: 0;
}

.message-export-list button:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.message-export-list button:focus-visible,
.message-export-menu .message-download-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Typing indicator */
.typing-indicator .message-bubble {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 14px 18px;
}
.typing-dot {
  width: 7px; height: 7px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typing-bounce .9s infinite;
}
.typing-dot:nth-child(2) { animation-delay: .15s; }
.typing-dot:nth-child(3) { animation-delay: .30s; }

@keyframes typing-bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40%           { transform: translateY(-6px); }
}

/* ── Input area ─────────────────────────────────────────────────── */
#input-area {
  padding: 16px 24px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

#input-form {
  max-width: 740px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  transition: border-color var(--transition);
}
#input-form:focus-within { border-color: var(--accent); }

#message-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14.5px;
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 200px;
  overflow-y: auto;
  font-family: inherit;
}
#message-input::placeholder { color: var(--text-muted); }

#send-btn {
  background: var(--accent);
  border: none;
  border-radius: 8px;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), opacity var(--transition);
  color: #fff;
}
#send-btn:hover   { background: var(--accent-hover); }
#send-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ── Modals ─────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fade-in .1s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 480px;
  max-width: calc(100vw - 32px);
  max-height: 80vh;
  overflow-y: auto;
  animation: slide-up .15s ease;
}
@keyframes slide-up { from { transform: translateY(12px); opacity: 0; } to { transform: none; opacity: 1; } }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; font-weight: 600; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color var(--transition);
}
.modal-close:hover { color: var(--text-primary); }

.modal-body { padding: 18px 20px; }

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }

.form-group textarea {
  resize: vertical;
  min-height: 78px;
  font-family: inherit;
}

.assistants-manage-grid {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 12px;
}

.assistants-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.assistants-list button {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 12.5px;
}

.assistants-list button:last-child {
  border-bottom: none;
}

.assistants-list button:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.assistants-list button.active {
  background: var(--bg-active);
  color: var(--text-primary);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.checkbox-row input {
  width: auto;
}

@media (max-width: 700px) {
  .assistants-manage-grid {
    grid-template-columns: 1fr;
  }
}

.form-row { display: flex; gap: 10px; align-items: flex-end; }
.form-row .form-group { flex: 1; margin-bottom: 0; }

/* Tag pills in modal */
.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 4px;
}
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--transition), opacity var(--transition);
  color: #fff;
}
.tag-pill:hover   { opacity: .85; }
.tag-pill.selected { border-color: #fff; }
.tag-pill .remove-tag {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  font-size: 14px;
  opacity: .7;
}
.tag-pill .remove-tag:hover { opacity: 1; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 20px 18px;
  border-top: 1px solid var(--border);
}

.btn {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}
.btn-primary   { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-active); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); }
.btn-danger    { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }

/* ── Utilities ──────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

.hidden { display: none !important; }

.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 12000;
  background: radial-gradient(circle at 20% 20%, rgba(16, 163, 127, 0.16), transparent 45%),
              radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.16), transparent 40%),
              rgba(9, 9, 11, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.auth-header {
  padding: 20px 22px 12px;
  border-bottom: 1px solid var(--border);
}

.auth-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.auth-subtitle {
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.auth-tabs {
  display: flex;
  gap: 8px;
  padding: 14px 22px 0;
}

.auth-tab {
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
}

.auth-tab.active {
  border-color: rgba(16, 163, 127, 0.35);
  color: var(--accent);
  background: var(--accent-dim);
}

.auth-body {
  padding: 16px 22px 22px;
}

.auth-error {
  margin-top: 10px;
  font-size: 12px;
  color: #f59e0b;
  min-height: 16px;
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 700px) {
  :root { --sidebar-w: 260px; }
  #sidebar { position: absolute; z-index: 500; height: 100%; }
  #sidebar.collapsed { transform: translateX(-100%); }
  #messages-list { padding: 0 14px; }
  #input-area { padding: 12px 14px 16px; }
}