:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --ink: #1a2330;
  --ink-secondary: #4a5568;
  --ink-muted: #718096;
  --border: #dde2e8;
  --accent: #1d5fa8;
  --accent-hover: #174d89;
  --danger-bg: #fdecec;
  --danger-ink: #9b2226;
  --warn-bg: #fff6e0;
  --warn-ink: #7a5200;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

header, main, footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

header { padding-top: 28px; }
header h1 { margin: 0 0 6px; font-size: 1.7rem; }
.subtitle { color: var(--ink-secondary); margin: 0 0 18px; max-width: 60em; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 22px;
}
.panel h2 { margin-top: 0; font-size: 1.25rem; }
.panel h3 { margin: 26px 0 10px; font-size: 1.05rem; }

.preset-row {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  margin-bottom: 14px; color: var(--ink-secondary);
}
.preset {
  background: var(--surface); color: var(--accent);
  border: 1px solid var(--accent); border-radius: 6px;
  padding: 4px 12px; cursor: pointer; font-size: 0.9rem;
}
.preset:hover { background: #eef4fb; }

.control-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
fieldset {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px 14px; margin: 0; min-width: 0;
}
legend { font-weight: 600; padding: 0 6px; font-size: 0.95rem; }
label { display: block; margin: 8px 0 0; color: var(--ink-secondary); font-size: 0.88rem; }
input[type="number"], input[type="text"], select {
  display: block; width: 100%; margin-top: 3px;
  padding: 5px 8px; font-size: 0.95rem; color: var(--ink);
  border: 1px solid var(--border); border-radius: 6px; background: var(--surface);
}
input[type="file"] { margin-top: 4px; font-size: 0.85rem; }

details { margin-top: 14px; }
details summary { cursor: pointer; color: var(--accent); font-weight: 600; }
details .control-grid { margin-top: 12px; }

.run-row { display: flex; align-items: center; gap: 14px; margin-top: 18px; flex-wrap: wrap; }
#run-btn, #stop-btn {
  font-size: 1rem; font-weight: 600; padding: 9px 26px;
  border-radius: 8px; border: none; cursor: pointer;
}
#run-btn { background: var(--accent); color: #fff; }
#run-btn:hover { background: var(--accent-hover); }
#run-btn:disabled { background: var(--ink-muted); cursor: not-allowed; }
#stop-btn { background: var(--surface); color: var(--danger-ink); border: 1px solid var(--danger-ink); }

.progress-wrap { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 240px; }
.progress-bar {
  flex: 1; height: 10px; background: var(--border);
  border-radius: 5px; overflow: hidden; min-width: 120px;
}
.progress-fill {
  height: 100%; width: 0%; background: var(--accent);
  border-radius: 5px; transition: width 0.25s;
}
#progress-label { color: var(--ink-secondary); font-size: 0.85rem; white-space: nowrap; }

.note { color: var(--ink-muted); font-size: 0.83rem; }
.error-box {
  background: var(--danger-bg); color: var(--danger-ink);
  border-radius: 8px; padding: 10px 14px; margin-top: 12px; font-size: 0.9rem;
}
.warning-box {
  background: var(--warn-bg); color: var(--warn-ink);
  border-radius: 8px; padding: 8px 14px; margin: 8px 0; font-size: 0.9rem;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 10px; margin-top: 8px;
}
.meta-item {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px;
}
.meta-item .k { color: var(--ink-muted); font-size: 0.78rem; }
.meta-item .v { font-size: 1.02rem; font-weight: 600; }
.meta-item.ok .v { color: #1c7a3d; }
.meta-item.bad .v { color: var(--danger-ink); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { border-bottom: 1px solid var(--border); padding: 6px 10px; text-align: right; white-space: nowrap; }
th { color: var(--ink-secondary); font-weight: 600; background: var(--bg); }
td:first-child, th:first-child { text-align: left; }

.plot { width: 100%; }

footer { color: var(--ink-muted); font-size: 0.8rem; padding-bottom: 30px; }

@media (max-width: 640px) {
  .panel { padding: 14px; }
  header h1 { font-size: 1.3rem; }
}