:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #21262d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #a371f7;
  --accent-dark: #8957e5;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --border: #30363d;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1a1425 0%, var(--bg) 50%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 1.85rem;
}

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

.app-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.card {
  background: rgba(22, 27, 34, 0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 20px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.hint {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0 0 12px;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn-success {
  background: var(--success);
  color: #0d1117;
}

.btn:hover:not(:disabled) {
  opacity: 0.9;
}

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-box {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.login-box h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.login-box input {
  width: 100%;
  margin: 12px 0;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.login-error {
  color: var(--danger);
  font-size: 0.9rem;
  margin: 8px 0 0;
}

.mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.mode-toggle button {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  font-weight: 600;
}

.mode-toggle button.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(163, 113, 247, 0.12);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--muted);
}

.form-grid label.full {
  grid-column: 1 / -1;
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
}

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
  color: var(--text) !important;
}

.json-brief {
  margin-top: 16px;
}

.json-brief textarea {
  width: 100%;
  margin: 8px 0;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.type-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.type-toggle button {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  font-weight: 600;
}

.type-toggle button.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(163, 113, 247, 0.12);
}

.chat-log {
  min-height: 280px;
  max-height: 420px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
}

.msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.95rem;
  white-space: pre-wrap;
}

.msg-user {
  align-self: flex-end;
  background: rgba(163, 113, 247, 0.2);
  border: 1px solid rgba(163, 113, 247, 0.35);
}

.msg-assistant {
  align-self: flex-start;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.chat-input-row {
  display: flex;
  gap: 8px;
}

.chat-input-row textarea {
  flex: 1;
  min-height: 72px;
  resize: vertical;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
}

.status-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--muted);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-ready {
  background: rgba(63, 185, 80, 0.15);
  color: var(--success);
}

.badge-wait {
  background: rgba(210, 153, 34, 0.15);
  color: var(--warning);
}

.brief-preview {
  margin-top: 12px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: ui-monospace, monospace;
  font-size: 0.82rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-player {
  margin-top: 12px;
}

.result-player audio {
  width: 100%;
  margin-top: 8px;
}

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.credits-pill {
  margin-left: auto;
}

.banner {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
}

.banner-warning {
  background: rgba(210, 153, 34, 0.12);
  border: 1px solid rgba(210, 153, 34, 0.35);
  color: var(--warning);
}