/* ============================================================
   ScreenTime Nanny — blog UI (shared)
   ============================================================ */

/* Reading progress bar */
#rprog {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  z-index: 300; border-radius: 0 2px 2px 0;
  transition: width .1s linear;
}

/* Category tag chip */
.post-tag {
  display: inline-flex; align-items: center;
  padding: 3px 10px; margin-right: 10px;
  border-radius: 999px; font-size: 11.5px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

/* Table of contents */
.toc-box {
  margin: 20px 0 6px; padding: 14px 18px;
  border: 1px solid var(--line); border-radius: 14px;
  background: color-mix(in srgb, var(--accent) 4%, transparent);
}
.toc-box summary {
  cursor: pointer; font-weight: 700; font-size: 14px;
  letter-spacing: .04em; color: var(--ink);
  list-style: none; display: flex; align-items: center; gap: 8px;
}
.toc-box summary::before { content: "☰"; color: var(--accent); font-size: 13px; }
.toc-box summary::-webkit-details-marker { display: none; }
.toc-box ol { margin: 12px 0 2px; padding-left: 22px; }
.toc-box li { margin: 6px 0; font-size: 14.5px; line-height: 1.5; }
.toc-box a { color: var(--ink-dim); font-weight: 500; text-decoration: none; }
.toc-box a:hover { color: var(--accent); }

/* Related posts */
.related { margin-top: 46px; }
.related h2 { font-size: clamp(22px, 2.6vw, 28px); margin: 0 0 4px; }
.related .bgrid { margin-top: 20px; }

/* Blog index: search + filter chips */
.bctl { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 30px; }
.bsearch {
  flex: 1 1 240px; max-width: 340px;
  padding: 11px 16px; border-radius: 999px;
  border: 1px solid var(--line); background: color-mix(in srgb, var(--ink) 3%, transparent);
  color: var(--ink); font-size: 15px; font-family: inherit; outline: none;
  transition: border-color .2s;
}
.bsearch:focus { border-color: var(--accent); }
.bsearch::placeholder { color: var(--ink-faint); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 15px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: transparent;
  color: var(--ink-dim); font-size: 13.5px; font-weight: 600; font-family: inherit;
  transition: all .18s;
}
.chip:hover { color: var(--ink); border-color: var(--ink-faint); }
.chip.on {
  color: #06251f; background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border-color: transparent;
}
:root[data-theme="light"] .chip.on { color: #fff; }

/* Featured card */
.bfeat {
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
  padding: clamp(26px, 4vw, 42px); margin-top: 30px;
  border-radius: 22px; position: relative; overflow: hidden;
}
.bfeat::after {
  content: ""; position: absolute; right: -70px; top: -70px;
  width: 240px; height: 240px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%);
  pointer-events: none;
}
.bfeat .fe-eyebrow {
  font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 10px;
}
.bfeat h2 { font-size: clamp(24px, 3.4vw, 38px); line-height: 1.15; margin: 0 0 10px; }
.bfeat p.fe-desc { color: var(--ink-dim); font-size: 16px; line-height: 1.65; margin: 0 0 18px; max-width: 56ch; }
.bfeat .post-meta { margin: 0 0 6px; }
.bfeat .fe-cta { display: inline-flex; }
@media (max-width: 700px) { .bfeat { grid-template-columns: 1fr; } }

/* Card grid hover polish + hidden state for filtering */
.bcard { position: relative; }
.bcard .post-tag { align-self: flex-start; }
.bcard.hide { display: none; }
.bempty { color: var(--ink-faint); padding: 40px 0; text-align: center; display: none; }

/* Article footer (shared with index) */
.bfoot { border-top: 1px solid var(--line); margin-top: 56px; padding: 40px 0 34px; }
.bfoot .wrap { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; justify-content: space-between; }
.bfoot .brand span { font-size: 16px; }
.bfoot nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.bfoot nav a { color: var(--ink-dim); font-size: 14.5px; }
.bfoot nav a:hover { color: var(--ink); }
.bfoot .soc { display: flex; gap: 10px; }
.bfoot .soc a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 11px;
  border: 1px solid var(--line); color: var(--ink-dim); transition: all .2s;
}
.bfoot .soc a:hover { color: var(--accent); border-color: var(--accent); }
.bfoot .copy { flex-basis: 100%; color: var(--ink-faint); font-size: 13.5px; margin-top: 4px; }

/* Back-to-top */
#btt {
  position: fixed; right: 20px; bottom: 78px; z-index: 150;
  width: 40px; height: 40px; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px); color: var(--ink-dim);
  display: none; align-items: center; justify-content: center;
  transition: color .2s, border-color .2s;
}
#btt:hover { color: var(--accent); border-color: var(--accent); }
#btt.show { display: inline-flex; }