@font-face {
  font-family: "Ember Sans";
  src: url("../assets/ember-sans-regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Ember Sans";
  src: url("../assets/ember-sans-bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--ember-bright); }

.blog-header { position: sticky; top: 0; z-index: 10; background: var(--surface-glass); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.blog-header__inner { max-width: 760px; margin: 0 auto; padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; }
.blog-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.blog-brand__mark { width: 30px; height: 30px; border-radius: 10px; background: var(--ember-wash); border: 1px solid var(--ember-line); display: grid; place-items: center; transform: rotate(45deg); }
.blog-brand__mark span { width: 10px; height: 10px; border-radius: 3px; background: var(--ember); box-shadow: 7px 7px 0 var(--ember-bright); }
.blog-brand strong { font-size: 19px; letter-spacing: 0.02em; }
.blog-header nav a { color: var(--ink-soft); text-decoration: none; font-size: 14px; font-weight: 600; }

.blog-shell { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }

.blog-list__title { font-size: clamp(26px, 5vw, 38px); margin: 0 0 8px; letter-spacing: -0.02em; }
.blog-list__desc { color: var(--ink-muted); margin: 0 0 32px; max-width: 56ch; }
.blog-grid { display: grid; gap: 16px; }
.blog-card { display: block; border: 1px solid var(--line); border-radius: var(--radius-media); background: var(--surface); padding: 20px; text-decoration: none; color: var(--ink); transition: border-color 180ms ease, transform 180ms ease; }
.blog-card:hover { border-color: var(--ember-line); transform: translateY(-2px); }
.blog-card__tag { display: inline-block; padding: 3px 10px; border-radius: var(--radius-pill); background: var(--ember-wash); color: var(--ember-bright); font-size: 11px; font-weight: 700; margin-bottom: 10px; }
.blog-card h2 { margin: 0 0 6px; font-size: 20px; letter-spacing: -0.01em; }
.blog-card p { margin: 0; color: var(--ink-muted); font-size: 14px; line-height: 1.6; }
.blog-card time { display: block; margin-top: 10px; color: var(--ink-muted); font-size: 12px; }

.article-tag { display: inline-block; padding: 3px 10px; border-radius: var(--radius-pill); background: var(--ember-wash); color: var(--ember-bright); font-size: 11px; font-weight: 700; margin-bottom: 14px; }
.article-title { font-size: clamp(28px, 5vw, 42px); margin: 0 0 12px; letter-spacing: -0.02em; line-height: 1.15; }
.article-meta { color: var(--ink-muted); font-size: 13px; margin: 0 0 32px; }
.article-body h2 { font-size: 24px; margin: 40px 0 14px; letter-spacing: -0.01em; }
.article-body h3 { font-size: 19px; margin: 28px 0 10px; }
.article-body p { margin: 0 0 18px; color: var(--ink-soft); }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 22px; color: var(--ink-soft); }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--ink); }
.prompt-box { background: var(--ground-deep); border: 1px solid var(--line); border-radius: var(--radius-control); padding: 14px 16px; margin: 0 0 16px; font-family: monospace; font-size: 14px; color: var(--ink); white-space: pre-wrap; }
.prompt-box__label { display: block; font-family: var(--font-ui); color: var(--ember-bright); font-size: 12px; font-weight: 700; margin-bottom: 6px; }

.article-cta { margin-top: 48px; padding: 24px; border: 1px solid var(--ember-line); border-radius: var(--radius-media); background: var(--ember-wash); text-align: center; }
.article-cta p { margin: 0 0 14px; color: var(--ink); }
.article-cta a { display: inline-flex; min-height: 46px; padding: 0 24px; border-radius: var(--radius-pill); background: var(--ember); color: var(--ground-deep); font-weight: 700; align-items: center; text-decoration: none; }

.blog-footer { max-width: 760px; margin: 0 auto; padding: 0 20px 40px; color: var(--ink-muted); font-size: 13px; }
.blog-footer a { color: var(--ink-muted); }

@media (max-width: 480px) {
  body { font-size: 16px; }
  .blog-shell { padding: 24px 16px 48px; }
}