/* ═══════════════════════════════════════════════════════════
   Workfied v4 — Field Notes blog listing + article chrome
   Built on v4.css tokens. Source Serif 4 display · Inter body.
   ═══════════════════════════════════════════════════════════ */

/* ── Blog hero ── */
.blog-hero { max-width: 720px; margin: 0 auto; text-align: center; }
.blog-hero .display { font-size: clamp(36px, 5vw, 60px); margin-top: 16px; }
.blog-hero .lead { margin-top: 18px; }

/* ── Filters ── */
.fn-filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 32px 0 0; }
.fn-filter {
  padding: 9px 18px; border-radius: var(--r-btn); border: 1px solid var(--hairline);
  background: var(--canvas); font: 500 14px/1 var(--sans); color: var(--ink);
  cursor: pointer; transition: border-color .15s, background .15s, color .15s;
}
.fn-filter:hover { border-color: var(--iris); color: var(--iris); }
.fn-filter.on { background: var(--iris); border-color: var(--iris); color: #fff; }

/* ── Featured card ── */
.fn-featured {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 0;
  border: 1px solid var(--hairline); border-radius: var(--r-card); overflow: hidden;
  background: var(--canvas); margin-top: 44px;
}
.fn-featured .thumb {
  background: linear-gradient(150deg, var(--wash-deep), var(--wash));
  display: flex; align-items: center; justify-content: center; min-height: 300px;
  color: var(--iris);
}
.fn-featured .body {
  padding: clamp(28px, 4vw, 44px);
  display: flex; flex-direction: column; justify-content: center;
}
.fn-featured .tag {
  font-size: 12px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--iris);
}
.fn-featured h2 {
  font-family: var(--serif); font-size: clamp(24px, 3vw, 34px); font-weight: 400;
  letter-spacing: -0.03em; line-height: 1.13; margin: 14px 0 0;
}
.fn-featured h2 a { color: var(--ink); }
.fn-featured h2 a:hover { color: var(--iris); }
.fn-featured p { margin: 14px 0 0; font-size: 16px; line-height: 1.6; opacity: .7; }
.fn-by { display: flex; align-items: center; gap: 10px; margin-top: 20px; }
.fn-by .av {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(160deg, #4A51E8, var(--iris-deep)); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 13px;
}
.fn-by .nm { font-size: 14px; font-weight: 600; color: var(--ink); }
.fn-by .meta { font-size: 12.5px; opacity: .5; }
@media (max-width: 820px) { .fn-featured { grid-template-columns: 1fr; } .fn-featured .thumb { min-height: 180px; } }

/* ── Card grid ── */
.fn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 24px; }
.fn-card {
  border: 1px solid var(--hairline); border-radius: var(--r-card); overflow: hidden;
  background: var(--canvas); display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s;
}
.fn-card:hover { border-color: var(--iris); transform: translateY(-3px); }
.fn-card .thumb {
  background: linear-gradient(150deg, var(--wash), #F7F7FE);
  height: 150px; display: flex; align-items: center; justify-content: center;
  color: var(--iris);
}
.fn-card .body { padding: 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.fn-card .tag {
  font-size: 11px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--iris);
}
.fn-card h3 {
  font-family: var(--serif); font-size: 18px; font-weight: 400;
  letter-spacing: -0.02em; line-height: 1.25; margin: 0;
}
.fn-card h3 a { color: var(--ink); }
.fn-card h3 a:hover { color: var(--iris); }
.fn-card p { font-size: 14px; opacity: .6; line-height: 1.55; margin: 0; flex: 1; }
.fn-card .meta { font-size: 12.5px; opacity: .45; }
@media (max-width: 960px) { .fn-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .fn-grid { grid-template-columns: 1fr; } }

.fn-empty { margin-top: 24px; text-align: center; opacity: .5; font-size: 14.5px; }
.doc-ic { width: 56px; height: 56px; }