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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f0f2f5;
  color: #1a1a2e;
  min-height: 100vh;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

h1 { font-size: 1.7rem; margin-bottom: 4px; }
.subtitle { color: #555; margin-bottom: 20px; font-size: 0.95rem; }

/* ── Rows ── */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 140px;
}

.field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: #444;
}

.field select,
.field input[type="file"] {
  padding: 7px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 0.9rem;
  background: #fff;
  cursor: pointer;
}

.field select:focus { outline: 2px solid #4f8ef7; border-color: transparent; }

/* ── Tag input ── */
.tag-input {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: #fff;
  min-height: 38px;
  cursor: text;
}

.tag-input input {
  border: none;
  outline: none;
  font-size: 0.9rem;
  flex: 1;
  min-width: 120px;
  background: transparent;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #4f8ef7;
  color: #fff;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.82rem;
  font-weight: 600;
}

.tag .remove {
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  opacity: 0.8;
}
.tag .remove:hover { opacity: 1; }

.dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 6px;
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.dropdown.hidden { display: none; }

.dropdown-item {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.9rem;
}
.dropdown-item:hover, .dropdown-item.active { background: #eef3ff; }

/* ── Checkbox ── */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
}
.checkbox-label input { width: 16px; height: 16px; cursor: pointer; }

/* ── Sliders ── */
.slider-field { min-width: 160px; }
.slider-field label { font-size: 0.82rem; font-weight: 600; color: #444; }
.slider-field input[type="range"] { width: 100%; cursor: pointer; accent-color: #4f8ef7; }

/* ── Button ── */
.btn-primary {
  padding: 9px 28px;
  background: #4f8ef7;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-primary:hover:not(:disabled) { background: #2d6fe0; }
.btn-primary:disabled { background: #a0b8e8; cursor: not-allowed; }

.btn-secondary {
  padding: 9px 16px;
  background: #fff;
  color: #4f8ef7;
  border: 1.5px solid #4f8ef7;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.btn-secondary:hover:not(:disabled) { background: #eef3ff; }
.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }

.status-msg {
  font-size: 0.85rem;
  color: #555;
  align-self: center;
}

.db-meta-info {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: 0.8rem;
  color: #666;
  background: #f0f4f8;
  border: 1px solid #dde3ea;
  border-radius: 8px;
  padding: 8px 14px;
  margin-top: 2px;
}
.db-meta-info.hidden { display: none; }
.db-meta-info strong { color: #333; }

/* ── Accordion ── */
.accordion-row { align-items: flex-start; }

.accordion {
  flex: 1;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}

.accordion summary {
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  list-style: none;
  user-select: none;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::before { content: "▶ "; font-size: 0.7rem; }
.accordion[open] summary::before { content: "▼ "; }

.accordion-body {
  padding: 12px 14px;
  font-size: 0.85rem;
  line-height: 1.6;
  border-top: 1px solid #eee;
}
.accordion-body p { margin-bottom: 8px; }
.accordion-body table { border-collapse: collapse; width: 100%; margin-top: 6px; }
.accordion-body th, .accordion-body td {
  border: 1px solid #ddd;
  padding: 5px 10px;
  text-align: left;
  font-size: 0.83rem;
}
.accordion-body th { background: #f5f7ff; }

/* ── Tabs ── */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 2px solid #ddd;
  margin-bottom: 0;
}

.tab-btn {
  padding: 8px 18px;
  border: 1px solid #ddd;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: #f5f5f5;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: #555;
  transition: background 0.15s;
}
.tab-btn:hover { background: #e8eeff; }
.tab-btn.active { background: #fff; color: #4f8ef7; border-color: #ddd; border-bottom-color: #fff; margin-bottom: -2px; }

.tab-panel { display: none; background: #fff; border: 1px solid #ddd; border-top: none; border-radius: 0 0 8px 8px; padding: 16px; }
.tab-panel.active { display: block; }

/* ── Inner tabs (Dữ liệu / Dự báo / Comparison) ── */
.inner-tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  border-bottom: 1px solid #eee;
}
.inner-tab-btn {
  padding: 6px 14px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: #777;
  border-bottom: 2px solid transparent;
}
.inner-tab-btn.active { color: #4f8ef7; border-bottom-color: #4f8ef7; font-weight: 600; }

.inner-panel { display: none; }
.inner-panel.active { display: block; }

/* ── Info card ── */
.info-card {
  background: #f8faff;
  border: 1px solid #d0dff7;
  border-radius: 6px;
  padding: 12px 16px;
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 12px;
}
.info-card h3 { margin-bottom: 6px; font-size: 0.95rem; color: #2d6fe0; }
.info-card table { border-collapse: collapse; margin-top: 8px; width: 100%; }
.info-card th, .info-card td { border: 1px solid #dde; padding: 4px 10px; font-size: 0.82rem; }
.info-card th { background: #eef3ff; }

/* ── Loading ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 999;
  font-size: 1rem;
  color: #333;
}
.loading-overlay.hidden { display: none; }

.spinner {
  width: 44px; height: 44px;
  border: 4px solid #ddd;
  border-top-color: #4f8ef7;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .row { flex-direction: column; }
  .field { min-width: 100%; }
}

/* ── ARIMAX Section ── */
.section-divider {
  border: none;
  border-top: 2px solid #e0e4ef;
  margin: 32px 0 20px;
}

.section-title {
  font-size: 1.3rem;
  margin-bottom: 6px;
  color: #1a1a2e;
}

.btn-arimax {
  padding: 9px 28px;
  background: #e63946;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-arimax:hover:not(:disabled) { background: #c1121f; }
.btn-arimax:disabled { background: #f4a0a6; cursor: not-allowed; }

.arimax-card {
  border-color: #f4a0a6;
  background: #fff8f8;
}
.arimax-card h3 { color: #c1121f; }

/* ── Price limit inputs ── */
.price-limit-field { flex: 0 0 auto; min-width: 160px; }

.pct-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: #fff;
  padding: 4px 10px;
  width: fit-content;
}

.pct-input-wrap input[type="number"] {
  border: none;
  outline: none;
  font-size: 0.95rem;
  font-weight: 600;
  width: 56px;
  text-align: right;
  background: transparent;
  color: #1a1a2e;
  -moz-appearance: textfield;
}
.pct-input-wrap input[type="number"]::-webkit-inner-spin-button,
.pct-input-wrap input[type="number"]::-webkit-outer-spin-button { opacity: 1; }

.pct-unit {
  font-size: 0.9rem;
  color: #666;
  font-weight: 600;
}

.limit-hint {
  font-size: 0.82rem;
  color: #666;
  line-height: 1.5;
  margin: 0;
}

/* ── LLM Chat Bubble ── */
.chat-bubble-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #4f8ef7;
  color: #fff;
  font-size: 1.6rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(79,142,247,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: background 0.2s, transform 0.15s;
}
.chat-bubble-btn:hover { background: #2d6fe0; transform: scale(1.07); }

.chat-bubble-badge {
  position: absolute;
  top: 4px; right: 4px;
  width: 14px; height: 14px;
  background: #e63946;
  border-radius: 50%;
  font-size: 0.6rem;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700;
}

/* ── Chat Panel ── */
.chat-panel {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 480px;
  max-height: 620px;
  background: #fff;
  border: 1px solid #dde;
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
  display: flex;
  flex-direction: column;
  z-index: 999;
  overflow: hidden;
  /* open/close animation */
  transform-origin: bottom right;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.chat-panel.hidden {
  display: none;
}
.chat-panel.chat-panel--opening {
  animation: chatOpen 0.18s ease forwards;
}
@keyframes chatOpen {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

.chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 14px;
  background: #4f8ef7;
  color: #fff;
  flex-shrink: 0;
}
.chat-panel-title { font-weight: 700; font-size: 0.95rem; }
.chat-panel-header-actions { display: flex; gap: 4px; }

.chat-icon-btn {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  border-radius: 6px;
  width: 28px; height: 28px;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
}
.chat-icon-btn:hover { background: rgba(255,255,255,0.35); }

.chat-model-row {
  display: flex;
  gap: 6px;
  padding: 8px 10px 4px;
  flex-shrink: 0;
}
.chat-model-label {
  flex: 1;
  font-size: 0.82rem;
  font-weight: 600;
  color: #eef3ff;
  align-self: center;
}
.chat-load-btn {
  padding: 5px 10px;
  font-size: 0.82rem;
  white-space: nowrap;
}

.chat-status {
  font-size: 0.75rem;
  color: #777;
  padding: 2px 12px 6px;
  flex-shrink: 0;
  min-height: 18px;
}

/* ── Progress (reuse, compact) ── */
.llm-progress-wrap {
  height: 4px;
  background: #e8eeff;
  flex-shrink: 0;
  overflow: hidden;
}
.llm-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4f8ef7, #a78bfa);
  transition: width 0.3s ease;
}

/* ── Messages ── */
.llm-chat-box {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  background: #fafbff;
  scroll-behavior: smooth;
}

.llm-messages {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.llm-msg {
  max-width: 88%;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.85rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}
.llm-msg--user {
  align-self: flex-end;
  background: #4f8ef7;
  color: #fff;
  border-bottom-right-radius: 3px;
}
.llm-msg--assistant {
  align-self: flex-start;
  background: #fff;
  border: 1px solid #dde;
  color: #1a1a2e;
  border-bottom-left-radius: 3px;
}
.llm-msg--system {
  align-self: center;
  background: #f0f2f5;
  color: #888;
  font-size: 0.75rem;
  border-radius: 6px;
  padding: 5px 10px;
  max-width: 100%;
  text-align: center;
}

.llm-cursor {
  display: inline-block;
  animation: blink 0.8s step-end infinite;
  color: #4f8ef7;
  font-weight: bold;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── Think bubble ── */
.llm-msg--think {
  align-self: flex-start;
  background: #f5f0ff;
  border: 1px solid #c4b5fd;
  color: #5b21b6;
  border-radius: 10px;
  border-bottom-left-radius: 3px;
  font-size: 0.8rem;
  max-width: 95%;
  padding: 0;
  overflow: hidden;
}
.llm-msg--think summary {
  padding: 6px 10px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  user-select: none;
  color: #6d28d9;
}
.llm-msg--think summary::-webkit-details-marker { display: none; }
.llm-msg--think summary::before { content: "▶ "; font-size: 0.65rem; }
.llm-msg--think[open] summary::before { content: "▼ "; }
.llm-think-body {
  padding: 6px 10px 8px;
  border-top: 1px solid #ddd6fe;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
  color: #4c1d95;
  font-size: 0.78rem;
  max-height: 200px;
  overflow-y: auto;
}

/* ── Input ── */
.llm-input-row {
  display: flex;
  gap: 6px;
  padding: 8px;
  border-top: 1px solid #eee;
  flex-shrink: 0;
  background: #fff;
}
.llm-input {
  flex: 1;
  padding: 7px 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 0.85rem;
  font-family: inherit;
  resize: none;
  min-height: 36px;
  max-height: 90px;
  line-height: 1.4;
}
.llm-input:focus { outline: 2px solid #4f8ef7; border-color: transparent; }
.llm-input:disabled { background: #f5f5f5; color: #aaa; }

.llm-input-btns {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.llm-input-btns .btn-primary,
.llm-input-btns .btn-secondary {
  padding: 6px 10px;
  font-size: 0.82rem;
}

/* ── Responsive ── */
@media (max-width: 440px) {
  .chat-panel { width: calc(100vw - 16px); right: 8px; bottom: 80px; }
  .chat-bubble-btn { bottom: 16px; right: 16px; }
}