:root {
  --bg: #f3f1eb;
  --panel: #fffefb;
  --ink: #1d2428;
  --muted: #5f6a70;
  --border: #d8d4c8;
  --accent: #054a91;
  --alert-bg: #ffef87;
  --alert-ink: #4a3000;
  --alert-strong: #ff8f00;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 10%, #fff7d6 0%, transparent 30%),
    radial-gradient(circle at 85% 90%, #d5f4ff 0%, transparent 35%),
    var(--bg);
  color: var(--ink);
}

.app {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem 3rem;
}

header h1 {
  margin: 0;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem);
}

header p {
  margin-top: 0.5rem;
  color: var(--muted);
  max-width: 70ch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  margin-top: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

.input-panel label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

textarea {
  width: 100%;
  min-height: 180px;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 0.85rem;
  font: 500 0.95rem/1.4 "IBM Plex Mono", "Fira Code", monospace;
  background: #fff;
  color: var(--ink);
  resize: vertical;
}

.actions {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
}

button {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 0.6rem 0.95rem;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

button.secondary {
  background: #6d7479;
}

.panel-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.panel-title-row h2 {
  margin: 0;
  font-size: 1.2rem;
}

.active-filter,
.summary-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.rendered-text {
  margin-top: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  min-height: 180px;
  padding: 0.9rem;
  font: 500 0.95rem/1.5 "IBM Plex Mono", "Fira Code", monospace;
  background: #fff;
  white-space: pre-wrap;
  word-break: break-word;
}

.flagged {
  position: relative;
  background: var(--alert-bg);
  color: var(--alert-ink);
  outline: 2px solid transparent;
  border-radius: 3px;
}

.flagged.reduced {
  opacity: 0.28;
}

.flagged.active {
  background: #ffd03b;
  outline-color: var(--alert-strong);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.65rem;
}

.result-table th,
.result-table td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 0.6rem 0.5rem;
  vertical-align: top;
}

.result-table th {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 700;
}

.result-table tbody tr {
  cursor: pointer;
}

.result-table tbody tr:hover {
  background: #f4f9ff;
}

.result-table tbody tr.selected {
  background: #e5f1ff;
}

.char-cell {
  font: 700 0.95rem/1.2 "IBM Plex Mono", "Fira Code", monospace;
}

.tag {
  display: inline-block;
  border-radius: 4px;
  border: 1px solid #d6cfb0;
  background: #fffbe0;
  padding: 0.05rem 0.25rem;
}

.empty-state {
  color: var(--muted);
  padding: 0.45rem 0;
}

@media (max-width: 720px) {
  .app {
    margin-top: 1rem;
  }

  .rendered-text,
  textarea {
    min-height: 150px;
  }
}