:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --fg: #1c1c1c;
  --bubble-user: #2563eb;
  --bubble-user-fg: #ffffff;
  --bubble-bot: #ffffff;
  --bubble-bot-fg: #1c1c1c;
  --border: #e2e2e0;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --fg: #eaeaea;
    --bubble-bot: #24262b;
    --bubble-bot-fg: #eaeaea;
    --border: #33353a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  height: 100vh;
}

[hidden] {
  display: none !important;
}

#key-gate {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.key-card {
  max-width: 420px;
  width: 100%;
  background: var(--bubble-bot);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.75rem;
  text-align: center;
}

.key-card h1 {
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
}

.key-card p {
  font-size: 0.875rem;
  opacity: 0.75;
  margin: 0 0 1rem;
  line-height: 1.4;
}

#key-form {
  display: flex;
  gap: 0.5rem;
}

#key-input {
  flex: 1;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  padding: 0.6rem 0.8rem;
  font: inherit;
}

.key-error {
  color: #ef4444;
  font-size: 0.8rem;
  margin: 0.75rem 0 0;
}

.key-hint {
  margin-top: 1rem !important;
  font-size: 0.75rem !important;
}

.key-hint a {
  color: var(--accent);
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

header {
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}

header p {
  margin: 0;
  font-size: 0.875rem;
  opacity: 0.7;
}

main#chat {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bubble {
  max-width: 70%;
  padding: 0.65rem 0.9rem;
  border-radius: 0.9rem;
  line-height: 1.4;
  font-size: 0.95rem;
  white-space: pre-wrap;
}

.bubble.user {
  align-self: flex-end;
  background: var(--bubble-user);
  color: var(--bubble-user-fg);
  border-bottom-right-radius: 0.2rem;
}

.bubble.bot {
  align-self: flex-start;
  background: var(--bubble-bot);
  color: var(--bubble-bot-fg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 0.2rem;
}

.bubble.bot.loading {
  opacity: 0.6;
}

.result-card {
  align-self: flex-start;
  max-width: 70%;
  border: 1px solid var(--border);
  background: var(--bubble-bot);
  border-radius: 0.9rem;
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
}

.result-card .case-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.result-card .meta {
  opacity: 0.7;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

.result-card a {
  color: var(--accent);
  word-break: break-all;
}

.query-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  opacity: 0.55;
  padding-left: 0.2rem;
}

#composer {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.5rem 1.25rem;
  border-top: 1px solid var(--border);
}

#input {
  flex: 1;
  resize: none;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--bubble-bot);
  color: var(--fg);
  padding: 0.6rem 0.8rem;
  font: inherit;
}

button {
  border: none;
  background: var(--accent);
  color: white;
  padding: 0 1.25rem;
  border-radius: 0.6rem;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}