:root {
  --bg-main: #f3f6ee;
  --bg-panel: #fffef8;
  --ink: #1e2a22;
  --muted: #536259;
  --line: #b8c2b0;
  --accent: #1f6f4a;
  --accent-strong: #145739;
  --danger: #9f2430;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 0% 0%, #d8e7d4 0%, transparent 35%),
    radial-gradient(circle at 100% 100%, #e9efe0 0%, transparent 40%),
    linear-gradient(135deg, #f8fbf3 0%, #eef5ea 100%);
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 18px 40px rgba(35, 58, 42, 0.1);
}

h1,
h2 {
  margin-top: 0;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.lead,
.note,
.meta,
.status {
  margin: 0 0 14px;
  color: var(--muted);
}

.song-meta {
  margin: -2px 0 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.detector-form {
  display: grid;
  gap: 10px;
}

label {
  font-weight: 700;
  font-size: 0.95rem;
}

select,
input,
button {
  border-radius: 12px;
  border: 1px solid var(--line);
  padding: 10px 12px;
  font-size: 1rem;
}

select,
input {
  background: #fff;
}

button {
  margin-top: 8px;
  border: none;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 150ms ease,
    filter 150ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

button:active {
  transform: translateY(0);
}

.status.error {
  color: var(--danger);
}

.status.success {
  color: var(--accent);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.result-table th,
.result-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px 6px;
  text-align: right;
}

.result-table th:first-child,
.result-table td:first-child {
  text-align: center;
}

.result-table thead th {
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.result-table tbody tr.best-pattern {
  background: #e5f4ea;
  font-weight: 700;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .panel {
    padding: 16px;
  }
}