:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --bg-elevated: #111827;
  --border-subtle: #1f2933;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.14);
  --accent-strong: #0ea5e9;
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --danger: #ef4444;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.6);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #1d283a 0, #020617 55%, #000 100%);
  color: var(--text);
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.app {
  width: 100%;
  max-width: 960px;
  margin: 24px auto;
  padding: 20px;
  border-radius: 18px;
  background: radial-gradient(circle at top left, #1f2937 0, #020617 60%);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.18);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app-header h1 {
  margin: 0 0 6px;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.config-panel {
  margin-top: 8px;
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.96),
    rgba(15, 23, 42, 0.92)
  );
  border: 1px solid rgba(148, 163, 184, 0.28);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 18px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

input[type="text"],
textarea {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font-size: 0.95rem;
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.slider-group input[type="range"] {
  width: 100%;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.consent-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.primary-button,
.secondary-button {
  border: none;
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.16s ease, transform 0.08s ease,
    box-shadow 0.16s ease, border-color 0.16s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent-strong), #22c55e);
  color: #0b1120;
  box-shadow: 0 8px 22px rgba(34, 197, 94, 0.45);
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(34, 197, 94, 0.6);
}

.primary-button:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.45);
}

.secondary-button {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.secondary-button:hover {
  background: rgba(30, 64, 175, 0.4);
}

.chat-section {
  margin-top: 4px;
  padding: 14px 16px 16px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top right, #020617 0, #020617 55%);
  border: 1px solid rgba(148, 163, 184, 0.35);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.chat-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.chat-topic {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.chat-window {
  min-height: 240px;
  max-height: 420px;
  overflow-y: auto;
  padding: 10px;
  border-radius: var(--radius-md);
  background: radial-gradient(
      circle at top left,
      rgba(15, 23, 42, 0.97),
      rgba(15, 23, 42, 0.98)
    ),
    linear-gradient(
      135deg,
      rgba(37, 99, 235, 0.08),
      rgba(56, 189, 248, 0.06)
    );
  border: 1px solid rgba(148, 163, 184, 0.3);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message {
  padding: 7px 10px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(31, 41, 55, 0.8);
  box-shadow: 0 7px 20px rgba(15, 23, 42, 0.7);
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(
    135deg,
    rgba(56, 189, 248, 0.2),
    rgba(96, 165, 250, 0.16)
  );
}

.message.assistant {
  align-self: flex-start;
}

.message-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.message-content {
  font-size: 0.9rem;
  line-height: 1.4;
  white-space: pre-wrap;
}

.chat-input-area {
  display: flex;
  flex-direction: row;
  gap: 8px;
  align-items: flex-end;
  margin-top: 4px;
}

.chat-input-area textarea {
  flex: 1;
  min-height: 52px;
  max-height: 140px;
}

.post-rating {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px dashed rgba(148, 163, 184, 0.4);
}

.post-rating h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.status-message {
  min-height: 18px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-message.error {
  color: var(--danger);
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .app {
    margin: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .config-panel {
    grid-template-columns: 1fr;
  }

  .chat-input-area {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}