:root {
  --ok:       #4ade80;
  --ok-bg:    #f0fdf4;
  --ok-ink:   #166534;
  --radius-sm: 10px;
}

main { flex: 1; }
.page {
  flex: 1;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: "JetBrains Mono", monospace; font-size: 10px;
  font-weight: 600; letter-spacing: 0.1em;
  padding: 2px 8px; border-radius: 999px; border: 1px solid transparent;
  vertical-align: middle; margin-left: 4px;
}
.badge::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.badge.upper  { background: var(--accent-soft); color: var(--accent-deep); border-color: var(--accent); }
.badge.lower  { background: #f0fdf4; color: #166534; border-color: #86efac; }
.badge.title  { background: #f5f3ff; color: #6d28d9; border-color: #c4b5fd; }
.badge.toggle { background: #fff7ed; color: #9a3412; border-color: #fdba74; }
.badge.hidden { display: none; }

.ad-slot { margin-bottom: 24px; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 16px;
}
.card-body { padding: 20px; }

.panel { margin-bottom: 16px; }
.panel:last-child { margin-bottom: 0; }
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 6px; padding: 0 2px;
}
.panel-label {
  font-family: "JetBrains Mono", monospace; font-size: 10px;
  letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; font-weight: 600;
}
.panel-meta { font-family: "JetBrains Mono", monospace; font-size: 11px; color: var(--muted); }

textarea {
  width: 100%; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; font-family: "JetBrains Mono", monospace;
  font-size: 13px; line-height: 1.7;
  background: var(--bg); color: var(--ink); resize: vertical; outline: none;
  transition: border-color 140ms, box-shadow 140ms, background 140ms;
}
textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(8,145,178,0.15);
  background: var(--surface);
}
textarea::placeholder { color: var(--muted); }
textarea[readonly] { background: var(--bg); cursor: default; }
textarea[readonly]:focus { border-color: var(--border); box-shadow: none; }

.action-bar { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 14px 0 8px; }
.clear-bar { margin-bottom: 16px; }

.btn {
  appearance: none; border: 1px solid var(--border); background: var(--surface);
  color: var(--ink); font-family: "Noto Sans JP", sans-serif;
  font-weight: 600; font-size: 13.5px; padding: 12px 16px;
  border-radius: var(--radius-sm); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 80ms, background 140ms, border-color 140ms, color 140ms;
  user-select: none; text-align: center; line-height: 1.4;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: white; font-weight: 700; }
.btn.primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn.secondary { background: var(--surface); border-color: var(--border); color: var(--sub); }
.btn.secondary:hover { background: var(--hover); }
.btn.ghost {
  background: var(--surface); border-color: var(--border); color: var(--muted);
  font-weight: 500; padding: 12px 14px;
}
.btn.ghost:hover { background: #fef2f2; border-color: #fca5a5; color: #dc2626; }
.btn-sub {
  display: block; font-family: "JetBrains Mono", monospace;
  font-size: 9.5px; font-weight: 400; letter-spacing: 0.04em; opacity: 0.65; margin-top: 2px;
}

.result-divider { display: flex; align-items: center; gap: 10px; color: var(--muted); margin: 4px 0 14px; }
.result-divider .line { flex: 1; height: 1px; background: var(--border); }
.result-divider .label { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: 0.16em; }

.panel-foot { display: flex; justify-content: flex-end; margin-top: 6px; }
.copy-btn {
  appearance: none; background: var(--surface); border: 1px solid var(--border);
  color: var(--sub); font-family: "Noto Sans JP", sans-serif;
  font-size: 12px; padding: 5px 12px; border-radius: 999px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 5px;
  transition: background 140ms, color 140ms, border-color 140ms;
}
.copy-btn:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-deep); }
.copy-btn.copied { background: var(--ok-bg); border-color: var(--ok); color: var(--ok-ink); }


code.inline {
  font-family: "JetBrains Mono", monospace; font-size: 12px;
  background: var(--bg); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: 4px; color: var(--ink);
}

@media (max-width: 900px) {
  main { padding: 0; }
}
@media (max-width: 480px) {
  .action-bar { grid-template-columns: 1fr; }
}