/* ============================================================
   purwarkrishna.dev — blog index / listing
   Loads after styles.css. Shares tokens, header, footer.
   ============================================================ */

.index-main {
  padding-top: clamp(120px, 16vh, 168px);
  padding-bottom: clamp(64px, 10vh, 120px);
}

/* ---------- page header ---------- */
.index-head {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  margin-bottom: clamp(40px, 6vh, 64px);
}
.index-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-top: 20px;
  text-wrap: balance;
}
.index-title em { font-style: italic; color: var(--muted); }
.index-intro {
  margin-top: 20px;
  max-width: 52ch;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.6;
  text-wrap: pretty;
}

/* ---------- filter bar ---------- */
.index-bar {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0 var(--gutter) 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}
.filters { display: flex; gap: 9px; flex-wrap: wrap; }
.filter {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color .25s var(--ease), color .25s var(--ease), background .25s var(--ease);
}
.filter:hover { border-color: var(--accent); color: var(--text); }
.filter.active {
  border-color: var(--accent);
  color: var(--accent-ink);
  background: var(--accent);
}
.index-count {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faint);
}
.index-count b { color: var(--accent); font-weight: 500; }

/* ---------- featured post ---------- */
.feature-wrap {
  max-width: var(--container);
  margin-inline: auto;
  padding: clamp(28px, 4vh, 44px) var(--gutter) 0;
}
.feature-post {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
  padding: clamp(26px, 3.5vh, 40px) 0 clamp(34px, 4.5vh, 48px);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.feature-flag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.feature-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: 16px;
  text-wrap: balance;
  transition: color .3s var(--ease);
}
.feature-post:hover .feature-title { color: var(--accent); }
.feature-ex {
  margin-top: 16px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.62;
  max-width: 46ch;
  text-wrap: pretty;
}
.feature-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--faint);
}
.feature-meta .dot { color: var(--line-strong); }
.feature-meta .read-link { color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.feature-visual {
  align-self: stretch;
  min-height: 260px;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background:
    repeating-linear-gradient(135deg, oklch(1 0 0 / 0.025) 0 2px, transparent 2px 13px),
    linear-gradient(150deg, var(--bg-2), var(--surface));
  position: relative;
}
html[data-theme="light"] .feature-visual {
  background:
    repeating-linear-gradient(135deg, oklch(0.30 0.02 62 / 0.04) 0 2px, transparent 2px 13px),
    linear-gradient(150deg, var(--bg-2), var(--surface));
}
.feature-visual .fv-cat {
  position: absolute;
  left: 18px; bottom: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

@media (max-width: 820px) {
  .feature-post { grid-template-columns: 1fr; gap: 24px; }
  .feature-visual { min-height: 180px; order: -1; }
}

/* ---------- post list ---------- */
.post-rows {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.post-row {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: clamp(20px, 4vw, 56px);
  align-items: baseline;
  padding: clamp(24px, 3.2vh, 34px) 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  position: relative;
  transition: background .3s var(--ease);
}
.post-row::before {
  content: "";
  position: absolute;
  left: calc(var(--gutter) * -1);
  right: calc(var(--gutter) * -1);
  top: 0; bottom: 0;
  background: var(--bg-2);
  opacity: 0;
  transition: opacity .3s var(--ease);
  z-index: -1;
}
.post-row:hover::before { opacity: 0.5; }

.pr-side {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.pr-cat {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.pr-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}
.pr-main { min-width: 0; }
.pr-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.3rem, 2.3vw, 1.7rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
  transition: color .3s var(--ease);
  text-wrap: balance;
}
.post-row:hover .pr-title { color: var(--accent); }
.pr-ex {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.97rem;
  line-height: 1.55;
  max-width: 60ch;
  text-wrap: pretty;
}
.pr-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}
.pr-arrow {
  color: var(--muted);
  transition: transform .3s var(--ease), color .3s var(--ease);
}
.post-row:hover .pr-arrow { transform: translateX(4px); color: var(--accent); }

.post-row.is-hidden { display: none; }

.index-empty {
  max-width: var(--container);
  margin-inline: auto;
  padding: 60px var(--gutter);
  text-align: center;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 13px;
  display: none;
}

@media (max-width: 720px) {
  .post-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .pr-side { flex-direction: row; gap: 12px; align-items: center; }
  .pr-meta { display: none; }
}