/* =====================================================
   blog.css
   CleaningRatio – Blog listing page
   Clean white editorial style (no heavy boxed UI)
===================================================== */

.blog-page {
  padding-block: var(--space-4) var(--space-6);
}

/* ---------- Hero ---------- */
.blog-hero {
  max-width: 760px;
  margin: 0 auto;
  padding-block: clamp(18px, 3vw, 30px) clamp(20px, 3vw, 34px);
  text-align: left;
}

.blog-eyebrow {
  margin: 0 0 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

.blog-hero h1 {
  margin: 0;
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  color: var(--color-text);
}

.blog-subtitle {
  margin: 14px 0 0;
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: 1.02rem;
  max-width: 58ch;
}

/* ---------- Browse-by-guide strip ---------- */
.blog-guides {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding-block: 0 clamp(14px, 2vw, 22px);
}

.blog-guides h2 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 0 0 10px;
}

.blog-guides-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.blog-guides-links a {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0 14px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-bg);
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.blog-guides-links a:hover {
  border-color: rgba(31, 79, 216, 0.22);
  background: rgba(31, 79, 216, 0.04);
  box-shadow: 0 8px 18px rgba(31, 79, 216, 0.08);
  transform: translateY(-1px);
}

/* ---------- Controls ---------- */
.blog-controls {
  max-width: 760px;
  margin: 0 auto;
  padding-block: 8px 18px;
  border-bottom: 1px solid var(--color-border);
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
  align-items: center;
}

.blog-filter {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 0 14px;
  height: 36px;
  min-height: 36px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease;
}

.blog-filter:hover {
  border-color: rgba(31, 79, 216, 0.22);
  background: rgba(31, 79, 216, 0.04);
  box-shadow: 0 8px 18px rgba(31, 79, 216, 0.08);
  transform: translateY(-1px);
}

.blog-filter.is-active {
  background: rgba(31, 79, 216, 0.12);
  color: var(--color-primary);
  border-color: rgba(31, 79, 216, 0.18);
  box-shadow: 0 8px 18px rgba(31, 79, 216, 0.08);
}

.blog-search-wrap input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 0 14px;
  height: 42px;
  min-height: 42px;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}

.blog-search-wrap input::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

/* ---------- Article list ---------- */
.blog-list-section {
  max-width: 760px;
  margin: 0 auto;
  padding-top: 14px;
}

.blog-library {
  display: block;
}

.blog-card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  transition:
    transform 160ms ease,
    background-color 160ms ease;
}

.blog-card:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.blog-card:hover h3 {
  text-decoration: none;
  color: var(--color-primary);
}

.blog-card.is-hidden {
  display: none;
}

.blog-card-tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.blog-card h3 {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.35;
  color: var(--color-text);
}

.blog-card p {
  margin: 8px 0 0;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.blog-card-meta {
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ---------- Load more ---------- */
.blog-loadmore {
  display: flex;
  justify-content: center;
  padding-top: 18px;
}

.blog-loadmore button {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  border-radius: 12px;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.blog-loadmore button:hover {
  border-color: rgba(31, 79, 216, 0.22);
  background: rgba(31, 79, 216, 0.04);
  box-shadow: 0 8px 18px rgba(31, 79, 216, 0.08);
  transform: translateY(-1px);
}

/* Optional: future-proof if you ever disable it */
.blog-loadmore button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Mobile spacing ---------- */
@media (max-width: 640px) {
  .blog-page {
    padding-block: var(--space-3) var(--space-5);
  }

  .blog-hero,
  .blog-controls,
  .blog-list-section {
    padding-inline: 2px; /* tiny extra breathing inside calculator-page shell */
  }

  .blog-card {
    padding-block: 16px;
  }
  .blog-filters {
    gap: 8px;
    margin-bottom: 10px;
  }

  .blog-filter {
    height: 34px;
    min-height: 34px;
    padding: 0 12px;
    font-size: 0.9rem;
  }

  .blog-search-wrap input {
    height: 40px;
    min-height: 40px;
    padding-inline: 12px;
  }
}