:root {
  --bg-primary: #F7F5F0;
  --bg-secondary: #EEEAE2;
  --bg-accent: #1A1A18;
  --text-primary: #1A1A18;
  --text-secondary: #4A4844;
  --text-muted: #8A8680;
  --accent-gold: #C8973A;
  --accent-teal: #1E7B6B;
  --border: #D8D4CC;
  --white: #FFFFFF;
  --font-display: 'Playfair Display', serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
}

.dj-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 310px 1fr;
}

.dj-sidebar {
  background: var(--bg-accent);
  color: var(--white);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.dj-sidebar__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dj-avatar,
.dj-msg__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-gold);
  color: var(--bg-accent);
  font-family: var(--font-mono);
  font-weight: 500;
}

.dj-name {
  font-family: var(--font-display);
  font-size: 24px;
}

.dj-tagline {
  color: #D7D1C6;
  font-size: 13px;
}

.dj-sidebar__nav {
  display: grid;
  gap: 10px;
  margin: 42px 0;
}

.dj-mode {
  text-align: left;
  border: 1px solid rgba(255,255,255,0.12);
  background: transparent;
  color: #EDE7DC;
  border-radius: 8px;
  padding: 13px 14px;
  cursor: pointer;
}

.dj-mode.active,
.dj-mode:hover {
  background: var(--bg-primary);
  color: var(--bg-accent);
}

.dj-back {
  color: #D7D1C6;
  text-decoration: none;
}

.dj-main {
  display: grid;
  grid-template-rows: 1fr auto;
  min-width: 0;
}

.dj-messages {
  overflow: auto;
  padding: 42px;
}

.dj-msg {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.dj-msg--user {
  justify-content: flex-end;
}

.dj-msg--user .dj-msg__bubble {
  background: var(--accent-teal);
  color: var(--white);
}

.dj-msg__bubble {
  max-width: min(720px, 86%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.dj-msg__bubble pre {
  overflow: auto;
  background: var(--bg-accent);
  color: var(--bg-primary);
  border-radius: 8px;
  padding: 14px;
}

.dj-msg__bubble code {
  font-family: var(--font-mono);
}

.dj-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-left: 58px;
}

.dj-chip,
.upload-inner button {
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
}

.dj-input-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 18px 28px;
  background: rgba(247,245,240,0.92);
  border-top: 1px solid var(--border);
}

#dj-input {
  resize: none;
  min-height: 50px;
  max-height: 160px;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-primary);
  outline: none;
}

.dj-send-btn {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  border: 0;
  background: var(--bg-accent);
  color: var(--white);
  cursor: pointer;
}

.dj-upload-zone {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(247,245,240,0.88);
}

.upload-inner {
  border: 1px dashed var(--accent-teal);
  background: var(--white);
  border-radius: 14px;
  padding: 34px;
  text-align: center;
}

#file-input {
  display: none;
}

.dot-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin: 0 3px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: dotPulse 1s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(-4px); opacity: 1; }
}

@media (max-width: 820px) {
  .dj-layout {
    grid-template-columns: 1fr;
  }

  .dj-sidebar {
    min-height: auto;
  }

  .dj-sidebar__nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 24px 0;
  }

  .dj-messages {
    padding: 24px 16px;
  }

  .dj-msg__bubble {
    max-width: 92%;
  }
}