:root {
  --bg: #f5f6f8;
  --panel: #fff;
  --line: #d9dde3;
  --text: #1f2933;
  --sub: #667085;
  --accent: #2f6fdb;
  --win: #1a7f4b;
  --lose: #c0392b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.app-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 20px;
  background: #1f2a44;
  color: #fff;
}
.app-header h1 { margin: 0; font-size: 18px; }
.app-header a { color: inherit; text-decoration: none; }
.note { font-size: 12px; opacity: .75; }
.app-header .version { font-size: 12px; opacity: .8; margin-left: 6px; font-weight: normal; }
.app-header .log-btn { margin-left: auto; align-self: center; padding: 4px 12px; border: 1px solid currentColor; border-radius: 6px; font-size: 13px; }
.app-header .log-btn:hover { background: rgba(255,255,255,.2); }
.changelog-body { white-space: pre-wrap; }

main { max-width: 1200px; margin: 0 auto; padding: 16px 20px 48px; }
h2 { font-size: 18px; margin: 8px 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 14px;
}

.hint { color: var(--sub); font-size: 12px; margin: 4px 0 8px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }

.cards { display: flex; flex-wrap: wrap; gap: 12px; }
.card {
  display: flex; flex-direction: column; gap: 4px;
  width: 260px; padding: 16px; text-align: left;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  font: inherit; color: inherit; cursor: pointer;
}
.card:hover:not(.disabled) { border-color: var(--accent); }
.card.disabled { opacity: .5; cursor: not-allowed; }
.card span { color: var(--sub); font-size: 12px; }

textarea {
  width: 100%; font: 12px/1.4 Consolas, monospace;
  border: 1px solid var(--line); border-radius: 6px; padding: 8px;
}

button, .file-btn {
  font: inherit; padding: 6px 14px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
}
button.secondary, .file-btn { background: #fff; color: var(--accent); }
button.small { padding: 2px 8px; font-size: 12px; }
select { font: inherit; padding: 5px 8px; border-radius: 6px; border: 1px solid var(--line); }
.back-btn { display: inline-block; padding: 6px 14px; border-radius: 6px; border: 1px solid var(--accent); color: var(--accent); background: #fff; text-decoration: none; }
.back-btn:hover { background: #eef3fd; }
.to-top { position: fixed; right: 20px; bottom: 20px; box-shadow: 0 2px 8px rgba(0,0,0,.25); z-index: 10; }
.to-top[hidden] { display: none; }

.drop {
  margin: 8px 0; padding: 14px; text-align: center; color: var(--sub);
  border: 2px dashed var(--line); border-radius: 8px;
}
.drop.over { border-color: var(--accent); background: #eef4ff; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; vertical-align: top; }
th { background: #eef0f4; font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.selected td { background: #eef4ff; }
tr.clickable { cursor: pointer; }
.table-wrap { overflow-x: auto; max-height: 520px; overflow-y: auto; }
td small { display: block; color: var(--sub); font-size: 11px; }

.win { color: var(--win); font-weight: 600; }
.lose { color: var(--lose); font-weight: 600; }
.draw { color: var(--sub); font-weight: 600; }

.tag { display: inline-block; padding: 0 6px; margin-right: 3px; border-radius: 8px; background: #eef0f4; font-size: 11px; }
.warn { color: #9a6700; }
.err { color: var(--lose); }

.section-title { margin: 14px 0 6px; font-size: 13px; color: var(--sub); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.toggle-btn { margin-left: 10px; padding: 3px 12px; border: 1px solid #888; border-radius: 14px; background: transparent; color: inherit; cursor: pointer; font-size: 0.85em; }
.toggle-btn[aria-pressed="true"] { background: #3b82f6; border-color: #3b82f6; color: #fff; }
@media (max-width: 800px) { .grid2 { grid-template-columns: 1fr; } }