:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1a2233;
  --muted: #5f6b82;
  --line: #d9dfec;
  --primary: #1456d6;
  --primary-hover: #0f47b3;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef2fb 0%, var(--bg) 180px);
}

.container {
  width: min(960px, 92vw);
  margin: 0 auto;
  padding: 32px 0 56px;
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
}

header p {
  margin: 10px 0 0;
  color: var(--muted);
}

.panel {
  margin-top: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

textarea {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  font: inherit;
}

.controls {
  margin-top: 12px;
  display: flex;
  gap: 10px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button.primary {
  background: var(--primary);
  color: #fff;
}

button.primary:hover { background: var(--primary-hover); }

button.ghost {
  background: #edf2ff;
  color: #1e3f8e;
}

.result-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}

.card .label {
  font-size: 0.86rem;
  color: var(--muted);
}

.card .value {
  margin-top: 6px;
  font-size: 1.2rem;
  font-weight: 700;
}

footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.9rem;
}
.related-title {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-links a {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: #1f3f90;
  background: #f3f7ff;
  font-size: 0.88rem;
}

.related-links a:hover {
  background: #e9f0ff;
}