:root {
  --bg: #f7f5f0;
  --paper: #ffffff;
  --ink: #1d1d1b;
  --sub: #6b6860;
  --line: #e2ded4;
  --accent: #2c4a6e;
  --accent-ink: #ffffff;
  --warn: #8a5a00;
  --warn-bg: #fff4dc;
  --ng: #9b2c2c;
  --ng-bg: #fdecec;
  --ok-bg: #eaf2ea;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 16px; line-height: 1.8;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.logo { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: .08em; }
.nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; font-size: 15px; }
.nav a { text-decoration: none; }
.pt { font-size: 13px; color: var(--sub); }
.btn-sm { background: var(--accent); color: var(--accent-ink) !important; padding: 4px 14px; border-radius: 999px; }
.main { padding-top: 28px; padding-bottom: 56px; min-height: 60vh; }
h1 { font-size: 26px; line-height: 1.5; margin: 0 0 16px; }
h2 { font-size: 20px; line-height: 1.5; margin: 36px 0 12px; }
h3 { font-size: 17px; margin: 24px 0 8px; }
.lead { color: var(--sub); }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin: 0 0 16px; }
.meta { color: var(--sub); font-size: 13px; }
.tag { display: inline-block; font-size: 12px; border: 1px solid var(--line); border-radius: 999px; padding: 0 10px; margin-right: 6px; color: var(--sub); }
.tag-open { border-color: var(--accent); color: var(--accent); }
.flash { padding: 12px 16px; border-radius: 8px; background: var(--ok-bg); }
.flash-warn { background: var(--warn-bg); color: var(--warn); }
.flash-ng { background: var(--ng-bg); color: var(--ng); }
form.stack label { display: block; font-weight: 600; margin: 14px 0 4px; }
input[type=email], input[type=password], input[type=text], input[type=number], input[type=date], textarea, select {
  width: 100%; font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
textarea { min-height: 160px; resize: vertical; }
button, .btn {
  display: inline-block; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 10px 22px; margin-top: 14px;
}
.btn-line { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-danger { background: var(--ng); }
.inline { display: inline; }
.bid-row { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; margin-top: 8px; }
.bid-row input { width: 140px; }
.bid-row button { margin-top: 0; }
.comment-body { white-space: normal; word-break: break-word; margin: 8px 0; }
.stats { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--sub); }
.stats b { color: var(--ink); }
.hero { padding: 48px 0 24px; }
.hero h1 { font-size: 30px; letter-spacing: .04em; }
.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { counter-increment: s; position: relative; padding-left: 40px; margin: 0 0 14px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 2px; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; text-align: center; line-height: 28px; font-size: 14px; }
table.list { width: 100%; border-collapse: collapse; background: var(--paper); font-size: 14px; }
table.list th, table.list td { border-bottom: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
.msg { padding: 10px 14px; border-radius: 10px; margin: 8px 0; max-width: 85%; background: var(--paper); border: 1px solid var(--line); word-break: break-word; }
.msg-me { margin-left: auto; background: #eef2f7; }
.site-footer { border-top: 1px solid var(--line); background: var(--paper); }
.footer-inner { display: flex; gap: 16px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 18px; font-size: 13px; }
.copy { color: var(--sub); margin-left: auto; }
@media (max-width: 560px) {
  h1 { font-size: 22px; }
  .hero h1 { font-size: 24px; }
  .copy { margin-left: 0; }
}