:root {
  --bg: #0a0a0a;
  --panel: #141414;
  --panel-alt: #1a1a1a;
  --sand: #efe9df;
  --ivory: #f8f4ef;
  --gold: #d4af6d;
  --gold-soft: #a97f3d;
  --ink: #171717;
  --muted: #8a8a8a;
  --line: rgba(255, 255, 255, 0.1);
  --user-bubble: #252525;
  --assistant-bubble: #f1eadb;
  --assistant-text: #1d1d1d;
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(212, 175, 109, 0.12), transparent 35%),
    linear-gradient(180deg, #090909 0%, #121212 100%);
  color: var(--ivory);
  font-family: "Montserrat", Arial, sans-serif;
  display: flex;
  justify-content: center;
}

button,
textarea {
  font: inherit;
}

.page-shell {
  width: min(1100px, calc(100% - 32px));
  padding: 32px 0 48px;
}

.site-header {
  margin-bottom: 28px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(15, 15, 15, 0.8);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}

.brand-logo {
  width: 120px;
  height: auto;
  filter: brightness(0) invert(1);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.7rem;
  color: var(--gold);
  margin-bottom: 8px;
}

.brand-copy h1 {
  font-size: clamp(1.8rem, 2vw, 2.7rem);
  font-weight: 600;
}

.hero-panel {
  background: rgba(26, 26, 26, 0.9);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 30px 26px;
  margin-bottom: 24px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12);
}

.demo-tag {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 109, 0.4);
  color: var(--gold);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero-text h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 12px;
}

.hero-text p:last-child {
  color: rgba(255, 255, 255, 0.7);
  max-width: 750px;
  line-height: 1.7;
}

.chat-panel {
  background: rgba(16, 16, 16, 0.9);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 22px 56px rgba(0, 0, 0, 0.14);
  padding: 20px;
}

.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.suggestion-btn {
  border: 1px solid rgba(212, 175, 109, 0.35);
  background: rgba(212, 175, 109, 0.08);
  color: var(--ivory);
  border-radius: 999px;
  padding: 9px 14px;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.suggestion-btn:hover,
.suggestion-btn:focus-visible {
  transform: translateY(-1px);
  background: rgba(212, 175, 109, 0.14);
  border-color: rgba(212, 175, 109, 0.7);
}

.chat-window {
  min-height: 420px;
  max-height: 60vh;
  overflow-y: auto;
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.message-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  animation: slideUp 0.2s ease;
}

.message-row.user {
  justify-content: flex-end;
}

.message-row.assistant {
  justify-content: flex-start;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.72rem;
  color: #111;
  background: linear-gradient(135deg, #f4dca0, #d0a55e);
  flex-shrink: 0;
}

.message-row.user .avatar {
  order: 2;
  background: linear-gradient(135deg, #f5f1eb, #d5d5d5);
}

.bubble {
  max-width: min(78%, 560px);
  border-radius: 18px;
  padding: 12px 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble.user {
  background: var(--user-bubble);
  border-top-right-radius: 6px;
  color: #f4f0eb;
}

.bubble.assistant {
  background: var(--assistant-bubble);
  border-top-left-radius: 6px;
  color: var(--assistant-text);
}

.message-meta {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.78;
  margin-bottom: 4px;
}

.message-content {
  font-size: 0.98rem;
}

.message-time {
  font-size: 0.7rem;
  opacity: 0.72;
  margin-top: 6px;
}

.message-error {
  color: #a32626;
  font-size: 0.8rem;
  margin-top: 8px;
}

.retry-btn {
  margin-top: 6px;
  border: 0;
  padding: 4px 0;
  color: #754d12;
  background: transparent;
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
}

.storage-warning {
  color: #f0c77e;
  font-size: 0.8rem;
  text-align: center;
}

.chat-form {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  align-items: flex-end;
}

#userInput {
  flex: 1;
  min-height: 52px;
  max-height: 160px;
  resize: vertical;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.02);
  color: var(--ivory);
  padding: 14px 16px;
  font-size: 1rem;
  line-height: 1.5;
}

#userInput:focus-visible,
.primary-btn:focus-visible,
.secondary-btn:focus-visible,
.suggestion-btn:focus-visible {
  outline: 2px solid rgba(212, 175, 109, 0.9);
  outline-offset: 2px;
}

#userInput::placeholder {
  color: rgba(255, 255, 255, 0.46);
}

.primary-btn,
.secondary-btn {
  border: none;
  border-radius: 14px;
  padding: 14px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--gold), #b98b43);
  color: #111;
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ivory);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

.secondary-btn:disabled,
.suggestion-btn:disabled {
  opacity: 0.55;
  cursor: wait;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  padding: 24px;
}

.empty-badge {
  background: rgba(212, 175, 109, 0.11);
  color: var(--gold);
  border: 1px solid rgba(212, 175, 109, 0.4);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.typing {
  opacity: 0.9;
}

.typing-dots {
  display: inline-flex;
  gap: 6px;
  padding: 6px 2px 2px;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(17, 17, 17, 0.7);
  animation: bounce 0.9s infinite ease-in-out;
}

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

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

@keyframes bounce {
  0%,
  80%,
  100% {
    transform: scale(0.7);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@media (max-width: 700px) {
  .page-shell {
    width: min(100% - 20px, 1100px);
    padding-top: 18px;
  }

  .brand-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 16px;
  }

  .brand-logo {
    width: 98px;
  }

  .chat-panel {
    padding: 14px;
  }

  .chat-form {
    flex-wrap: wrap;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .bubble {
    max-width: 84%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}