:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #0b1220;
  color: #e6edf7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #152238, #0b1220 45%);
}

.app-shell {
  width: min(900px, 100% - 2rem);
  margin: 2rem auto;
  display: grid;
  gap: 1rem;
}

h1,
h2,
p {
  margin: 0;
}

.panel {
  background: rgba(13, 26, 44, 0.85);
  border: 1px solid #2b3f61;
  border-radius: 12px;
  padding: 1rem;
}

.hidden {
  display: none;
}

.status-banner {
  min-height: 1.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  background: rgba(39, 63, 95, 0.35);
  border: 1px solid transparent;
}

.status-banner[data-kind='error'] {
  border-color: #b42318;
  background: rgba(180, 35, 24, 0.2);
}

.status-banner[data-kind='ok'] {
  border-color: #2f9e44;
  background: rgba(47, 158, 68, 0.2);
}

.form-grid {
  display: grid;
  gap: 0.75rem;
}

.field {
  display: grid;
  gap: 0.25rem;
  font-size: 0.9rem;
}

input,
button {
  border-radius: 8px;
  border: 1px solid #33507a;
  background: #0f1a2b;
  color: inherit;
  padding: 0.6rem 0.75rem;
  font: inherit;
}

button {
  cursor: pointer;
  background: #1f6feb;
  border-color: #1f6feb;
  font-weight: 600;
}

button.secondary {
  background: transparent;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.chat-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  align-items: baseline;
}

.identity {
  color: #9fb3d1;
  font-size: 0.9rem;
}

.message-list {
  margin-top: 0.75rem;
  min-height: 260px;
  max-height: 420px;
  overflow: auto;
  display: grid;
  gap: 0.5rem;
  padding: 0.75rem;
  border-radius: 8px;
  background: #0b1321;
  border: 1px solid #2b3f61;
}

.message-item {
  display: grid;
  gap: 0.2rem;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  background: #111d30;
  border: 1px solid #243856;
}

.message-meta {
  font-size: 0.75rem;
  color: #9fb3d1;
}

.message-text {
  word-break: break-word;
}

.message-file a {
  color: #8ec5ff;
}

.composer {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.file-row {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.file-picker {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.9rem;
}

.file-picker input {
  padding: 0;
  border: 0;
  background: transparent;
}