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

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ===== Light Theme (default) ===== */
:root {
  --bg: #f5f5f7;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f0f0f3;
  --border: #d8d8de;
  --border-hover: #c0c0c8;
  --text: #1a1a2e;
  --text-dim: #6a6a7e;
  --text-muted: #9999aa;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-dim: rgba(99, 102, 241, 0.10);
  --green: #16a34a;
  --orange: #d97706;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --glow: rgba(99, 102, 241, 0.06);
  --modal-overlay: rgba(0, 0, 0, 0.3);
  --scrollbar-thumb: #c0c0c8;
  --score-high-bg: rgba(22, 163, 74, 0.12);
  --score-mid-bg: rgba(217, 119, 6, 0.12);
  --score-low-bg: rgba(150, 150, 170, 0.12);
  --track-bg: rgba(217, 119, 6, 0.08);
  --track-border: rgba(217, 119, 6, 0.25);
  --track-hover-bg: rgba(217, 119, 6, 0.15);
  --link-hover: #4338ca;
  --tip-bg: rgba(59, 130, 246, 0.06);
  --tip-border: rgba(59, 130, 246, 0.15);
  --tip-strong: #2563eb;
}

/* ===== Dark Theme ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0f;
    --bg-elevated: #12121a;
    --bg-card: #16161f;
    --bg-input: #1a1a25;
    --border: #232330;
    --border-hover: #2e2e3d;
    --text: #e8e8f0;
    --text-dim: #8888a0;
    --text-muted: #5a5a70;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-dim: rgba(99, 102, 241, 0.15);
    --green: #22c55e;
    --orange: #f59e0b;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --glow: rgba(99, 102, 241, 0.08);
    --modal-overlay: rgba(10, 10, 15, 0.6);
    --scrollbar-thumb: #2e2e3d;
    --score-high-bg: rgba(34, 197, 94, 0.15);
    --score-mid-bg: rgba(245, 158, 11, 0.15);
    --score-low-bg: rgba(136, 136, 160, 0.15);
    --track-bg: rgba(245, 158, 11, 0.12);
    --track-border: rgba(245, 158, 11, 0.3);
    --track-hover-bg: rgba(245, 158, 11, 0.2);
    --link-hover: #c4b5fd;
    --tip-bg: rgba(59, 130, 246, 0.1);
    --tip-border: rgba(59, 130, 246, 0.2);
    --tip-strong: #60a5fa;
  }
}

html {
  font-size: 15px;
  color-scheme: light dark;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Subtle background glow */
body::before {
  content: '';
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, var(--glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ===== Layout ===== */
.container {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Header ===== */
header {
  padding: 24px 0 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2px;
}

header .logo {
  display: inline-block;
  margin-bottom: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: opacity var(--transition);
}

header .logo:hover { opacity: 0.75; }

header .logo-text {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--transition);
}

header .logo:hover .logo-text { transform: scale(0.98); }

/* ===== Floating Avatar Picker ===== */
.avatar-floating-picker {
  position: fixed;
  z-index: 200;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  width: 248px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.12s ease;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}

.avatar-option {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  font-size: 20px;
  background: transparent;
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.avatar-option:hover {
  background: var(--accent-dim);
  border-color: var(--border-hover);
  transform: scale(1.15);
}

.avatar-option.selected {
  background: var(--accent-dim);
  border-color: var(--accent);
}

header .tagline {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ===== Chat Area ===== */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-top: 20px;
}

.chat {
  flex: 1;
  overflow-y: auto;
  padding: 4px 4px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-behavior: smooth;
}

/* Scrollbar */
.chat::-webkit-scrollbar { width: 6px; }
.chat::-webkit-scrollbar-track { background: transparent; }
.chat::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

/* ===== Messages ===== */
.message-row {
  display: flex;
  gap: 10px;
  max-width: 85%;
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-row.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.avatar.assistant {
  background: linear-gradient(135deg, var(--accent), #a855f7);
}

.avatar.user {
  background: var(--bg-input);
  border: 1px solid var(--border);
}

.bubble {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble.assistant {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top-left-radius: 4px;
  color: var(--text);
}

.bubble.user {
  background: var(--accent);
  border-top-right-radius: 4px;
  color: #fff;
}

/* Source links */
.source-links {
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  border-top-left-radius: 4px;
  font-size: 0.85rem;
}

.source-links .source-label {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.source-links a {
  color: var(--accent-hover);
  text-decoration: none;
  display: block;
  padding: 3px 0;
  transition: color var(--transition);
}

.source-links a:hover { color: var(--link-hover); }

/* ===== Loading ===== */
.loading-bubble {
  display: flex;
  align-items: center;
  gap: 10px;
}

.typing-dots {
  display: flex;
  gap: 4px;
}

.typing-dots span {
  width: 7px;
  height: 7px;
  background: var(--text-dim);
  border-radius: 50%;
  animation: typingBounce 1.2s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.typing-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* ===== Listing Cards ===== */
.listing {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  animation: fadeInUp 0.3s ease;
  max-width: 85%;
}

.listing:hover {
  border-color: var(--border-hover);
  border-left-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.listing-body {
  display: flex;
  gap: 0;
}

.listing-img-wrap {
  width: 160px;
  min-height: 110px;
  flex-shrink: 0;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.listing-img-wrap::before {
  content: "🚗";
  font-size: 32px;
  opacity: 0.2;
  position: absolute;
}

.listing-img {
  width: 100%;
  height: 100%;
  min-height: 110px;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.listing-img[src=""],
.listing-img:not([src]) {
  opacity: 0;
}

.listing-content {
  padding: 12px 16px;
  flex: 1;
  min-width: 0;
}

.listing-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
}

.listing-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}

.score-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.score-badge.high { background: var(--score-high-bg); color: var(--green); }
.score-badge.mid { background: var(--score-mid-bg); color: var(--orange); }
.score-badge.low { background: var(--score-low-bg); color: var(--text-dim); }

.listing-meta {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.listing-meta .sep { color: var(--text-muted); margin: 0 5px; }

.listing-reasons {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.4;
}

.listing-link {
  font-size: 0.8rem;
  color: var(--accent-hover);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.listing-link:hover { color: var(--link-hover); }

/* ===== Show More Button ===== */
.show-more-btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.show-more-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Composer ===== */
.composer {
  padding: 16px 0 24px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.composer-inner {
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.composer-inner:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

.composer input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 0.95rem;
  padding: 12px 14px;
  font-family: inherit;
}

.composer input::placeholder { color: var(--text-muted); }

.composer-actions {
  display: flex;
  gap: 6px;
  padding-right: 6px;
}

.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  box-shadow: 0 1px 3px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), #8b5cf6);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--bg-card);
}

.btn-track {
  background: var(--track-bg);
  color: var(--orange);
  border: 1px solid var(--track-border);
  font-weight: 500;
}

.btn-track:hover {
  background: var(--track-hover-bg);
  border-color: var(--track-border);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 12px 20px 44px;
  color: var(--text-muted);
  animation: fadeInUp 0.4s ease;
}

.empty-state h3 {
  font-size: 1.25rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.empty-state p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-dim);
  max-width: 420px;
  margin: 0 auto 20px;
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 0;
}

.suggestion-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}

.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
  background: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .container { padding: 0 12px; }
  header .logo-text { font-size: 1.35rem; }
  .message-row { max-width: 95%; }
  .listing { max-width: 95%; }
  .listing-img { width: 110px; min-height: 90px; }
  .composer-actions { flex-direction: column; }
  .btn { font-size: 0.8rem; padding: 8px 12px; }
}

/* ===== Email Capture Modal ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.email-modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 440px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  animation: modalSlideUp 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.modal-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all var(--transition);
}

.modal-close:hover {
  color: var(--text);
  background: var(--bg-card);
}

.modal-desc {
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 16px;
}

.modal-desc strong {
  color: var(--green);
}

.modal-search-summary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 20px;
  font-size: 0.82rem;
  color: var(--text);
}

.modal-summary-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}

.modal-label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 6px;
  font-weight: 500;
}

.modal-email-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.modal-email-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.modal-email-input::placeholder {
  color: var(--text-muted);
}

.modal-submit {
  width: 100%;
  margin-top: 14px;
  padding: 12px;
  font-size: 0.92rem;
}

.modal-fineprint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 14px;
}

.modal-tip {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--tip-bg);
  border: 1px solid var(--tip-border);
  border-radius: 10px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-dim);
  animation: tipFadeIn 0.3s ease;
}

.modal-tip strong {
  color: var(--tip-strong);
}

@keyframes tipFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .email-modal { padding: 20px; }
  .modal-header h2 { font-size: 1.05rem; }
}