:root {
  color-scheme: light dark;
  --surface: #070a18;
  --surface-alt: #0f142b;
  --primary: #00c6ff;
  --accent: #ff7a18;
  --text: #f4f6ff;
  --muted: #9aa7cf;
  --border: rgba(255, 255, 255, 0.08);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1a2147, #05060f 65%);
  color: var(--text);
}

.hero {
  padding: 2.5rem clamp(1rem, 5vw, 4rem);
  background: linear-gradient(120deg, #0f1633, #1d2a5b);
  border-bottom: 1px solid var(--border);
}

.hero-text {
  max-width: 720px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--accent);
}

h1 {
  margin: 0.4rem 0 0.25rem;
  font-size: clamp(2rem, 5vw, 3.6rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: clamp(1.5rem, 5vw, 3rem);
  align-items: start;
}

.panel {
  background: var(--surface);
  border-radius: 24px;
  border: 1px solid var(--border);
  padding: 1.75rem;
  box-shadow: 0 25px 60px rgba(2, 6, 23, 0.55);
}

.panel.hidden {
  display: none;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.9rem;
}

input, button {
  font: inherit;
}

input {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  padding: 0.75rem 1rem;
  color: var(--text);
}

button {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.4rem;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(120deg, var(--accent), var(--primary));
  color: #05060f;
  transition: opacity 0.2s ease;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.status {
  min-height: 1.2rem;
  font-size: 0.9rem;
}

.muted {
  color: var(--muted);
}

.chat {
  min-height: 500px;
  display: flex;
  flex-direction: column;
}

.context {
  min-height: 500px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.context-block {
  max-height: 230px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  background: var(--surface-alt);
}

.context-list {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.context-list li {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 0.5rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.9rem;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.chat-window {
  max-height: 55vh;
  overflow-y: auto;
  flex: 1;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(6, 8, 19, 0.8);
  padding: 1.2rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-input {
  display: flex;
  gap: 0.8rem;
  margin-top: 1rem;
}

.chat-input input {
  flex: 1;
}

.message {
  padding: 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.message header {
  display: flex;
  justify-content: space-between;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.message.user {
  background: rgba(0, 198, 255, 0.08);
  border-color: rgba(0, 198, 255, 0.24);
}

.message.assistant {
  background: rgba(255, 122, 24, 0.08);
  border-color: rgba(255, 122, 24, 0.24);
}

.tips {
  margin-top: 1.2rem;
  padding: 1rem;
  border-radius: 16px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.02);
}

.tips ul {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .chat-input {
    flex-direction: column;
  }
}