:root{
  --paper: #EEF0E9;
  --paper-raised: #F8F9F4;
  --ink: #1F2A24;
  --ink-soft: #55605A;
  --line: #D2D6C8;
  --brick: #A8432E;
  --brick-dark: #8B3423;
  --moss: #5E7259;
  --moss-pale: #E4EADD;
  --radius: 3px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 160px;
}

.intro h1 {
  font-family: 'Fraunces', serif;
  font-optical-sizing: auto;
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.intro p {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 8px;
}

.intro .fine {
  font-size: 0.9rem;
  color: var(--ink-soft);
  opacity: 0.85;
}

main { margin-top: 48px; }

.entry {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px 20px;
  margin-bottom: 14px;
}

.entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.entry-num {
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--brick);
}

.remove-btn {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius);
}
.remove-btn:hover { color: var(--brick); background: var(--moss-pale); }
.remove-btn:disabled { opacity: 0.25; cursor: not-allowed; }
.remove-btn:disabled:hover { background: none; color: var(--ink-soft); }

textarea {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  border: 1px solid transparent;
  background: transparent;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  padding: 0;
}
textarea::placeholder { color: #9AA294; }
textarea:focus {
  outline: none;
}
.entry:focus-within {
  border-color: var(--brick);
}

.add-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px dashed var(--line);
  color: var(--ink-soft);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 12px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  width: 100%;
  justify-content: center;
}
.add-btn:hover {
  border-color: var(--moss);
  color: var(--moss);
  background: var(--moss-pale);
}

:focus-visible {
  outline: 2px solid var(--brick);
  outline-offset: 2px;
}

/* Results */
.results { margin-top: 56px; }
.results-title {
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 1.4rem;
  margin: 0 0 4px;
}
.results-sub {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0 0 28px;
}
.group {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.group:last-child { border-bottom: 1px solid var(--line); }
.group-topic {
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--brick-dark);
  margin: 0 0 10px;
}
.group ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.group li {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink);
  padding: 8px 0;
  border-top: 1px solid #E4E6DA;
}
.group li:first-child { border-top: none; }

.error-box {
  border: 1px solid var(--brick);
  background: #FBEEEA;
  color: var(--brick-dark);
  padding: 16px 18px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  line-height: 1.5;
}
.error-box strong { display: block; margin-bottom: 4px; }

/* Toolbar */
.toolbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--paper-raised);
  border-top: 1px solid var(--line);
  padding: 16px 24px;
}
.toolbar-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.count {
  font-size: 0.85rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.submit-btn {
  background: var(--brick);
  color: #FBF8F2;
  border: none;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 11px 22px;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
}
.submit-btn:hover { background: var(--brick-dark); }
.submit-btn:disabled {
  background: #C7CBBC;
  cursor: not-allowed;
}

.status {
  max-width: 720px;
  margin: 8px auto 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
  min-height: 1.2em;
}
.status.is-error { color: var(--brick); }
.status.is-success { color: var(--moss); }

@media (max-width: 520px) {
  .page { padding: 40px 16px 180px; }
  .toolbar-inner { flex-direction: column; align-items: stretch; }
  .submit-btn { width: 100%; }
}

.similarity-table {
  width: 100%;
  border-collapse: collapse;
  font-family: monospace, sans-serif;
  margin-top: 1rem;
}

.similarity-table th, 
.similarity-table td {
  border: 1px solid #e0e0e0;
  padding: 8px 12px;
  text-align: center;
}

.similarity-table th {
  background-color: #f5f5f5;
  font-weight: bold;
}

.similarity-table tr:nth-child(even) {
  background-color: #fafafa;
}

/* Highlight diagonal self-similarity (1.000) */
.similarity-table td.self-match {
  background-color: #e2f0d9;
  font-weight: bold;
}