:root {
  color-scheme: dark;
  --bg: #0d1321;
  --panel: #151d31;
  --panel-2: #1c2742;
  --text: #e8ecf8;
  --muted: #9aa6c8;
  --accent: #72e0a8;
  --accent-2: #7ca8ff;
  --border: #2e3a5f;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: linear-gradient(180deg, #0b1020 0%, #12192b 100%);
  color: var(--text);
}

.layout {
  max-width: 1320px;
  margin: 0 auto;
  padding: 32px;
}

.hero, .panel, .tabs {
  background: rgba(21, 29, 49, 0.92);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(0,0,0,0.2);
}

.hero {
  padding: 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.tabs {
  display: inline-flex;
  gap: 10px;
  padding: 10px;
  margin-bottom: 24px;
}

.tab-button {
  width: auto;
  padding: 12px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.tab-button.active {
  background: linear-gradient(135deg, var(--accent) 0%, #4fceff 100%);
  color: #0b1020;
  border: none;
}

.tab-panel { display: none; margin-bottom: 24px; }
.tab-panel.active { display: block; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

h1, h2, h3 { margin: 0 0 12px; }
.lead { margin: 0; color: var(--muted); max-width: 760px; }

.helper {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 16px;
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 24px;
}

.single-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.chat-grid { grid-template-columns: 0.9fr 1.3fr; }

.panel { padding: 24px; }

label {
  display: block;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 14px;
}

input, textarea, select, button {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}

textarea { resize: vertical; }

button {
  width: auto;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent) 0%, #4fceff 100%);
  color: #0b1020;
  font-weight: 700;
  border: none;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.actions, .checkbox {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.checkbox input { width: auto; }

pre {
  background: #0b1020;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  overflow: auto;
  min-height: 160px;
  white-space: pre-wrap;
  word-break: break-word;
}

.context-status {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #0b1020;
  margin-bottom: 18px;
}

.context-status p {
  margin: 4px 0 0;
  color: var(--muted);
}

.indicator {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  box-shadow: 0 0 14px rgba(255,255,255,0.15);
}

.indicator-off { background: var(--danger); }
.indicator-on { background: var(--accent); }

.chat-messages {
  min-height: 260px;
  max-height: 520px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  background: #0b1020;
  margin-bottom: 16px;
}

.empty-chat { color: var(--muted); margin: 0; }

.message {
  margin-bottom: 14px;
  padding: 14px;
  border-radius: 14px;
  background: rgba(28, 39, 66, 0.9);
  border: 1px solid var(--border);
}

.message.user { border-left: 4px solid #4fceff; }
.message.assistant { border-left: 4px solid var(--accent); }
.message header { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.message p { margin: 0; white-space: pre-wrap; }

@media (max-width: 980px) {
  .grid, .single-grid, .chat-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    flex-direction: column;
  }
}