* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  color: #dedede;
  background: #101010;
  font: 15px/1.5 "Segoe UI", Helvetica, Arial, sans-serif;
}
a { color: #8eb6ff; text-decoration: none; }
a:hover { color: #b7d0ff; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(920px, calc(100% - 36px));
  margin: 0 auto;
  padding: 22px 0 8px;
}
.mark {
  color: #f2f2f2;
  font-size: 18px;
  letter-spacing: 0.08em;
}
.top nav { display: flex; gap: 18px; }
.top nav a { color: #a3a3a3; }
.top nav a:hover, .top nav a.on { color: #f2f2f2; }

.page { width: min(920px, calc(100% - 36px)); margin: 0 auto; padding-bottom: 72px; }
.hero { padding: 88px 0 28px; }
.hero h1 {
  margin: 0;
  color: #f4f4f4;
  font-weight: 560;
  font-size: 52px;
  letter-spacing: -1.4px;
}
.hero p { max-width: 460px; margin: 12px 0 0; color: #9a9a9a; }
.row { display: flex; gap: 10px; margin-top: 22px; }
.btn, .ghost {
  display: inline-block;
  border-radius: 4px;
  padding: 8px 14px;
  border: 1px solid #2e2e2e;
}
.btn { color: #111; background: #e8e8e8; border-color: #e8e8e8; }
.btn:hover { color: #111; background: #fff; }
.ghost { color: #dedede; background: transparent; }
.ghost:hover { color: #fff; border-color: #555; }

.faq { margin-top: 72px; border-top: 1px solid #222; }
.faq h2 { margin: 28px 0 8px; font-weight: 560; font-size: 18px; }
.item { padding: 16px 0; border-bottom: 1px solid #222; }
.item h3 { margin: 0 0 4px; font-weight: 500; font-size: 15px; }
.item p { margin: 0; color: #9a9a9a; }
.foot { margin-top: 28px; color: #666; font-size: 12px; }

.narrow { width: min(560px, 100%); margin: 36px auto 0; }
h1.plain { margin: 0 0 14px; font-weight: 560; font-size: 28px; letter-spacing: -0.4px; }
.box { background: #171717; border: 1px solid #262626; border-radius: 6px; }
.line {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 16px 0;
}
.line b { font-weight: 500; text-align: right; padding-top: 7px; }
.line small { display: block; color: #777; font-weight: 400; }
.line input, .line textarea, .stack input, .stack textarea {
  width: 100%;
  color: #eee;
  background: #101010;
  border: 1px solid #2c2c2c;
  border-radius: 4px;
  padding: 8px 10px;
}
.note { margin: 6px 0 0; color: #8a8a8a; font-size: 13px; }
.note a { color: #6ea8ff; }
.note a:hover { color: #9cc4ff; }
.end {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 16px;
  border-top: 1px solid #262626;
}
.end button, .textbtn {
  color: #111;
  background: #e8e8e8;
  border: 0;
  border-radius: 4px;
  padding: 8px 14px;
}
.end button:hover, .textbtn:hover { background: #fff; }
.after { margin-top: 14px; color: #9a9a9a; }
.msg { min-height: 18px; margin: 10px 16px 0; font-size: 13px; }
.err { color: #e08b96; }
.ok { color: #9dcaa8; }
.check { display: flex; gap: 8px; align-items: center; margin: 12px 16px 0; color: #cfcfcf; }
.check input { width: auto; }

.list { display: grid; gap: 8px; margin-top: 18px; }
.topic, .post, .card {
  display: block;
  color: inherit;
  background: #171717;
  border: 1px solid #262626;
  border-radius: 6px;
  padding: 12px 14px;
}
.topic:hover, .card:hover { border-color: #3a3a3a; }
.topic b, .post b, .card b { color: #f2f2f2; }
.topic span, .card span, .meta { color: #777; font-size: 12px; }
.post p, .card p { margin: 6px 0 0; white-space: pre-wrap; }
.stack { margin-top: 22px; }
.stack label { display: block; margin: 10px 0 6px; color: #888; font-size: 13px; }
.who { color: #888; }

@media (max-width: 680px) {
  .hero h1 { font-size: 38px; }
  .line { grid-template-columns: 1fr; gap: 4px; }
  .line b { text-align: left; padding-top: 0; }
}