/* ============================================================
   The Tech Pad — blog styles (thetechpad.com/blog)
   Builds on home/css/site.css tokens.
   ============================================================ */

/* ---------- index ---------- */
.blog-index { padding: 8px 0 90px; }
.bc-chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 26px; }
.bc-chip {
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  border-radius: 999px; padding: 8px 16px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: .18s;
}
.bc-chip:hover { border-color: var(--green); color: var(--green); }
.bc-chip.active { background: var(--deep); color: #fff; border-color: var(--deep); }

.bc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 980px) { .bc-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .bc-grid { grid-template-columns: 1fr; } }

.bc {
  display: flex; flex-direction: column; background: var(--card);
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.bc:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.bc-cover { width: 100%; height: 160px; object-fit: cover; }
.bc-body { display: flex; flex-direction: column; gap: 8px; padding: 18px 20px 20px; flex: 1; }
.bc-meta { display: flex; gap: 12px; align-items: center; color: var(--muted); font-size: 12px; flex-wrap: wrap; }
.bc-cat {
  background: var(--soft); color: var(--green); border-radius: 999px;
  padding: 2px 10px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
}
.bc h3 { margin: 0; font-size: 18px; line-height: 1.35; letter-spacing: -.01em; }
.bc p { margin: 0; color: var(--muted); font-size: 13.5px; flex: 1; }
.bc-more { color: var(--green); font-weight: 700; font-size: 13.5px; }
.bc-none { color: var(--muted); }

/* ---------- article ---------- */
.blog-article { max-width: 780px; padding: 54px 0 90px; }
.crumbs { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.crumbs a { color: var(--green); text-decoration: none; font-weight: 600; }
.ba-title { font-size: clamp(30px, 4.6vw, 44px); line-height: 1.12; letter-spacing: -.03em; margin: 0 0 14px; }
.ba-meta { display: flex; gap: 14px; align-items: center; color: var(--muted); font-size: 13px; margin-bottom: 24px; flex-wrap: wrap; }
.ba-cover { width: 100%; border-radius: 16px; margin-bottom: 26px; }

.qa-box {
  background: var(--soft); border: 1px solid #d3e8dd; border-radius: 14px;
  padding: 18px 22px; margin: 0 0 28px;
}
.qa-label { color: var(--green); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.qa-box h2 { font-size: 17px; margin: 6px 0 4px; }
.qa-box p { margin: 0; color: var(--ink); font-size: 14.5px; }

.ba-body { font-size: 16.5px; line-height: 1.75; color: var(--ink); }
.ba-body h2 { font-size: 25px; letter-spacing: -.02em; margin: 42px 0 10px; }
.ba-body h3 { font-size: 20px; margin: 32px 0 8px; }
.ba-body p { margin: 14px 0; }
.ba-body ul, .ba-body ol { margin: 14px 0; padding-left: 26px; }
.ba-body li { margin: 6px 0; }
.ba-body a { color: var(--green); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.ba-body strong { font-weight: 700; }
.ba-body blockquote {
  border-left: 3px solid var(--green); background: var(--soft);
  margin: 20px 0; padding: 12px 20px; border-radius: 0 10px 10px 0; color: #3c5148;
}
.ba-body pre {
  background: var(--deep); color: #e8f5ee; border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; font-size: 13.5px; line-height: 1.6;
}
.ba-body code {
  background: var(--soft); border-radius: 5px; padding: 2px 6px;
  font-size: 0.88em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.ba-body pre code { background: none; padding: 0; }
.ba-body hr { border: none; border-top: 1px solid var(--line); margin: 34px 0; }
.ba-body table { border-collapse: collapse; width: 100%; margin: 20px 0; font-size: 14.5px; }
.ba-body th, .ba-body td { border: 1px solid var(--line); padding: 9px 13px; text-align: left; }
.ba-body th { background: var(--soft); color: var(--deep); font-weight: 700; }
.ba-body tr:nth-child(even) td { background: #fafbf9; }

.blog-faq { margin-top: 46px; border-top: 1px solid var(--line); padding-top: 30px; }
.blog-faq h2 { font-size: 22px; margin: 0 0 6px; }
.blog-faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.blog-faq summary { font-weight: 700; cursor: pointer; list-style: none; }
.blog-faq summary:after { content: "+"; float: right; color: var(--green); font-size: 20px; }
.blog-faq details[open] summary:after { content: "–"; }
.blog-faq details p { color: var(--muted); font-size: 14.5px; padding-right: 30px; margin: 8px 0 0; }

.ba-cta {
  background: var(--lime); border-radius: 20px; padding: 44px 34px; margin-top: 52px; text-align: center;
}
.ba-cta h2 { font-size: clamp(24px, 3.4vw, 32px); letter-spacing: -.03em; margin: 0 auto 8px; max-width: 520px; line-height: 1.15; }
.ba-cta p { color: #3c5148; margin: 0 auto 20px; max-width: 460px; font-size: 14.5px; }

.blog-related { margin-top: 56px; }
.blog-related h2 { font-size: 22px; margin: 0 0 18px; }