@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-base:      #0d0d18;
  --bg-surface:   #13131f;
  --bg-elevated:  #1a1a2e;
  --bg-input:     rgba(255,255,255,0.05);
  --bg-hover:     rgba(255,255,255,0.06);

  --accent:       #7c6bff;
  --accent-dim:   #5a4dcc;
  --accent-soft:  rgba(124,107,255,0.18);
  --accent2:      #22dda6;
  --accent2-soft: rgba(34,221,166,0.12);

  --text:         #e2e2ee;
  --text-muted:   #7878a0;
  --text-faint:   #4f4f6a;

  --border:       rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.13);

  --danger:  #ff5a6a;
  --warning: #ffb347;
  --success: #22dda6;

  --r:   12px;
  --r-sm: 8px;
  --r-xs: 6px;
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ─── HEADER ─────────────────────────────────── */
.app-header {
  height: 52px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
  z-index: 100;
}
.app-header .logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.2px;
  background: linear-gradient(120deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.app-header .subtitle {
  margin-left: auto;
  color: var(--text-faint);
  font-size: 0.75rem;
  letter-spacing: 0.3px;
}

.header-tabs {
  display: flex;
  gap: 2px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--r-sm);
  padding: 3px;
  margin-left: 12px;
}
.tab-btn {
  padding: 6px 18px;
  border: none;
  border-radius: var(--r-xs);
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-btn:hover { color: var(--text); background: var(--bg-hover); }
.tab-btn.active { background: var(--accent); color: #fff; }

/* ─── LAYOUT ──────────────────────────────────── */
.main-container { display: flex; flex: 1; overflow: hidden; }
.tab-content { display: none; }
.tab-content.active { display: flex; }

/* ─── SIDEBAR ─────────────────────────────────── */
.sidebar {
  width: 260px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.sidebar-header {
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sidebar-header h3 {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 2px;
}
.config-row { display: flex; gap: 6px; }
.config-row input {
  flex: 1;
  padding: 7px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  color: var(--text);
  font-size: 0.78rem;
  outline: none;
  transition: border-color 0.2s;
}
.config-row input:focus { border-color: var(--accent); }

.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.toggle { position: relative; width: 34px; height: 18px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .slider {
  position: absolute; inset: 0;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 9px;
  cursor: pointer;
  transition: 0.25s;
}
.toggle .slider:before {
  content: '';
  position: absolute;
  height: 12px; width: 12px;
  left: 2px; bottom: 2px;
  background: var(--text-faint);
  border-radius: 50%;
  transition: 0.25s;
}
.toggle input:checked + .slider { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + .slider:before { transform: translateX(16px); background: #fff; }

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

.session-list { flex: 1; overflow-y: auto; padding: 6px; }
.session-item {
  padding: 9px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  border: 1px solid transparent;
  margin-bottom: 2px;
  transition: all 0.18s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.session-item:hover { background: var(--bg-hover); border-color: var(--border); }
.session-item.active {
  background: var(--accent-soft);
  border-color: rgba(124,107,255,0.28);
}
.session-item .name {
  font-size: 0.81rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.session-item .actions { display: flex; gap: 4px; flex-shrink: 0; }

/* Dropdown */
.dropdown { position: relative; display: inline-block; }
.dropdown-content {
  display: none;
  position: absolute; right: 0; top: calc(100% + 4px);
  background: var(--bg-elevated);
  min-width: 130px;
  border: 1px solid var(--border-hover);
  border-radius: var(--r-sm);
  z-index: 10;
  padding: 4px;
}
.dropdown-content.show { display: block; animation: fadeIn 0.12s ease; }
.dropdown-content button {
  width: 100%; text-align: left;
  background: none; border: none;
  padding: 8px 12px;
  color: var(--text);
  font-size: 0.78rem;
  cursor: pointer;
  border-radius: 5px;
  transition: background 0.12s;
}
.dropdown-content button:hover { background: var(--bg-hover); }

/* ─── CHAT AREA ───────────────────────────────── */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-base);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 0.9rem;
  font-weight: 300;
}

/* ─── MESSAGE BUBBLES ─────────────────────────── */

/*
  Layout:
  - user:      right-aligned, narrow (fits short queries)
  - assistant: left-aligned, wide (accommodates SQL + tables)
  - system:    centered, pill
*/

.message {
  font-size: 0.875rem;
  line-height: 1.7;
  animation: fadeIn 0.25s ease;
  word-wrap: break-word;
}

/* User message — constrained width, right side */
.message.user {
  align-self: flex-end;
  max-width: 52%;
  margin: 6px 28px 6px auto;
  padding: 11px 16px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--r) var(--r-xs) var(--r) var(--r);
  white-space: pre-wrap;
}

/* Assistant message — wider, left side, card style */
.message.assistant {
  align-self: flex-start;
  max-width: 82%;
  margin: 6px auto 6px 28px;
  padding: 16px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xs) var(--r) var(--r) var(--r);
}

/* System / notice */
.message.system {
  align-self: center;
  max-width: 70%;
  margin: 8px auto;
  padding: 8px 18px;
  background: rgba(255,179,71,0.07);
  border: 1px solid rgba(255,179,71,0.18);
  color: var(--warning);
  font-size: 0.78rem;
  border-radius: 20px;
}

/* Author label */
.message .author {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  opacity: 0.45;
}
.message.user .author { color: #fff; }
.message.assistant .author { color: var(--accent2); opacity: 0.7; }

/* ─── MARKDOWN ────────────────────────────────── */
.markdown-body { font-family: inherit; font-size: 0.875rem; line-height: 1.7; }
.markdown-body p { margin-bottom: 8px; }
.markdown-body p:last-child { margin-bottom: 0; }
.markdown-body strong { color: var(--accent2); font-weight: 600; }
.markdown-body ul, .markdown-body ol { margin-left: 18px; margin-bottom: 8px; }
.markdown-body li { margin-bottom: 3px; }
.markdown-body pre {
  background: rgba(0,0,0,0.3);
  padding: 12px 14px;
  border-radius: var(--r-sm);
  overflow-x: auto;
  margin: 10px 0;
  border: 1px solid var(--border);
}
.markdown-body code {
  background: rgba(0,0,0,0.28);
  padding: 2px 5px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82em;
}
.markdown-body pre code { background: none; padding: 0; }
.markdown-body table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 0.82rem; }
.markdown-body th, .markdown-body td { padding: 7px 12px; border: 1px solid var(--border); text-align: left; }
.markdown-body th { background: rgba(124,107,255,0.08); font-weight: 600; color: var(--accent2); }
.markdown-body details { margin-top: 10px; }
.markdown-body details summary {
  cursor: pointer; color: var(--accent2); font-weight: 500;
  font-size: 0.82rem; padding: 5px 0;
}

/* ─── SQL VERIFICATION BLOCK ──────────────────── */
.sql-verification-block {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.sql-details {
  background: rgba(10,10,20,0.45);
  border: 1px solid rgba(124,107,255,0.15);
  border-radius: var(--r-sm);
  overflow: hidden;
}
.sql-details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.78rem;
  padding: 10px 14px;
  user-select: none;
  color: var(--text);
  background: rgba(124,107,255,0.07);
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid transparent;
  transition: background 0.18s;
}
.sql-details summary:hover { background: rgba(124,107,255,0.14); }
.sql-details[open] summary { border-bottom-color: rgba(124,107,255,0.15); }
.sql-code {
  background: rgba(0,0,0,0.3) !important;
  border: none;
  border-radius: 0;
  padding: 14px !important;
  margin: 0 !important;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.sql-code code {
  color: var(--accent2) !important;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.78rem !important;
  background: none !important;
  padding: 0 !important;
  line-height: 1.6;
}
.sql-actions {
  padding: 10px 14px;
  background: rgba(0,0,0,0.4);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}
.btn-sql-action {
  background: rgba(255,255,255,0.07);
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.1);
  margin: 0;
  font-size: 0.73rem;
  padding: 6px 12px;
  border-radius: var(--r-xs);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.18s;
  cursor: pointer;
  font-weight: 500;
}
.btn-sql-action:hover { background: rgba(255,255,255,0.13); color: #fff; border-color: rgba(255,255,255,0.2); }
.btn-sql-action.btn-sql-play {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(124,107,255,0.3);
}
.btn-sql-action.btn-sql-play:hover { background: rgba(124,107,255,0.28); color: #fff; }

/* ─── INPUT BAR ───────────────────────────────── */
.chat-input-bar {
  padding: 14px 28px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.chat-input-bar textarea {
  flex: 1;
  resize: none;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: inherit;
  font-size: 0.875rem;
  outline: none;
  min-height: 44px;
  max-height: 140px;
  transition: border-color 0.2s;
  line-height: 1.5;
}
.chat-input-bar textarea:focus { border-color: var(--accent); }
.chat-input-bar textarea::placeholder { color: var(--text-faint); }

/* ─── BUTTONS ─────────────────────────────────── */
.btn {
  padding: 7px 16px;
  border: none;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  transition: all 0.18s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); color: var(--text); border-color: var(--border-hover); }
.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(255,90,106,0.3);
  padding: 4px 8px;
  font-size: 0.68rem;
}
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-faint);
  padding: 6px 8px;
  font-size: 0.73rem;
  border-radius: var(--r-xs);
}
.btn-icon:hover { color: var(--text); border-color: var(--text-muted); background: var(--bg-hover); }
.btn-send {
  padding: 11px 22px;
  border-radius: var(--r);
  font-size: 0.875rem;
  background: var(--accent);
  color: #fff;
  flex-shrink: 0;
}
.btn-send:hover { background: var(--accent-dim); }

/* ─── DATABASE TAB ────────────────────────────── */
.db-sidebar .sidebar-header { padding: 14px; }
.db-table-list { flex: 1; overflow-y: auto; padding: 6px; }

.db-table-item {
  border-radius: var(--r-sm);
  margin-bottom: 2px;
  overflow: hidden;
  border: 1px solid transparent;
  transition: all 0.18s;
}
.db-table-item:hover { border-color: var(--border); }
.db-table-name {
  padding: 9px 10px;
  cursor: pointer;
  font-size: 0.81rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: background 0.18s;
  border-radius: var(--r-sm);
}
.db-table-name:hover { background: var(--bg-hover); }
.db-table-name .icon { font-size: 0.68rem; transition: transform 0.2s; color: var(--text-faint); }
.db-table-name.open .icon { transform: rotate(90deg); color: var(--accent); }
.db-table-name .tname { flex: 1; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; }
.db-table-name .col-count {
  font-size: 0.66rem; color: var(--text-faint);
  background: var(--bg-input); padding: 2px 7px; border-radius: 10px;
}
.db-column-list { display: none; padding: 2px 10px 8px 28px; }
.db-column-list.open { display: block; animation: fadeIn 0.18s ease; }
.db-col-item {
  font-size: 0.74rem; padding: 4px 0;
  display: flex; justify-content: space-between;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.025);
}
.db-col-item:last-child { border-bottom: none; }
.db-col-item .col-name { color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: 0.76rem; }
.db-col-item .col-type {
  color: var(--accent2); font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem; background: var(--accent2-soft); padding: 1px 7px; border-radius: 4px;
}

.db-main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg-base); }

.sql-editor-area {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}
.sql-editor-header {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;
}
.sql-editor-title { font-size: 0.84rem; font-weight: 600; display: flex; align-items: center; gap: 7px; }
.sql-editor-actions { display: flex; gap: 7px; }

.sql-textarea {
  width: 100%; min-height: 100px; max-height: 200px; resize: vertical;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--accent2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.83rem;
  padding: 14px 16px;
  outline: none; transition: border-color 0.2s; line-height: 1.6;
}
.sql-textarea:focus { border-color: var(--accent); }
.sql-textarea::placeholder { color: var(--text-faint); font-family: 'Inter', sans-serif; font-size: 0.8rem; }

.db-results-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.db-results-header {
  padding: 9px 24px; border-bottom: 1px solid var(--border);
  font-size: 0.76rem; color: var(--text-muted); background: var(--bg-surface);
  display: flex; align-items: center; justify-content: space-between; font-weight: 500;
}
.db-results-table-wrap { flex: 1; overflow: auto; }

.db-empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; color: var(--text-faint); text-align: center; padding: 40px;
}
.db-empty-icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.35; }
.db-empty-state p { font-size: 0.85rem; margin-bottom: 6px; line-height: 1.6; }
.db-empty-hint {
  font-size: 0.78rem; color: var(--accent); opacity: 0.65;
  margin-top: 8px; padding: 7px 14px;
  background: var(--accent-soft);
  border-radius: var(--r-sm);
  border: 1px dashed rgba(124,107,255,0.2);
}

.db-results-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.db-results-table th {
  position: sticky; top: 0; z-index: 1;
  background: var(--bg-surface); padding: 10px 14px; text-align: left;
  font-weight: 600; font-size: 0.7rem; text-transform: uppercase;
  letter-spacing: 0.7px; color: var(--accent);
  border-bottom: 1px solid rgba(124,107,255,0.25);
  font-family: 'JetBrains Mono', monospace;
}
.db-results-table td {
  padding: 8px 14px; border-bottom: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace; font-size: 0.79rem;
  max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.db-results-table tr:hover td { background: rgba(124,107,255,0.04); }
.db-results-table tr:nth-child(even) td { background: rgba(255,255,255,0.013); }

.db-error {
  margin: 16px 24px; padding: 16px 20px;
  background: rgba(255,90,106,0.07);
  border: 1px solid rgba(255,90,106,0.18);
  border-radius: var(--r-sm);
  color: var(--danger); font-size: 0.83rem; line-height: 1.6;
}

/* ─── SCROLLBAR ───────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.07); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

/* ─── TOAST ───────────────────────────────────── */
.toast {
  position: fixed; bottom: 20px; right: 20px;
  padding: 10px 20px; border-radius: var(--r-sm);
  font-size: 0.82rem; z-index: 999;
  animation: slideUp 0.25s ease;
  font-weight: 500;
}
.toast.success { background: var(--success); color: #000; }
.toast.error { background: var(--danger); color: #fff; }

/* ─── LOADING ─────────────────────────────────── */
.loading-dots { display: flex; gap: 4px; padding: 8px 0; }
.loading-dots span {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); opacity: 0.6;
  animation: bounce 1.4s infinite ease-in-out both;
}
.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

/* ─── ANIMATIONS ──────────────────────────────── */
@keyframes fadeIn  { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bounce  { 0%,80%,100%{ transform: scale(0); } 40%{ transform: scale(1); } }