/*
 * VarshaKrishi — css/pages/blog-index.css
 * Page-specific styles for the Blog directory index.
 * Strictly uses CSS tokens from tokens.css.
 */

/* ═══════════════════════════════════════════════════════════════
 * 1. HERO SECTION
 * ═══════════════════════════════════════════════════════════════ */

.blog-hero {
  position: relative;
  padding-top: calc(var(--nav-height) + var(--space-12));
  padding-bottom: var(--space-8);
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border-default);
}

.blog-hero__inner {
  max-width: var(--grid-max);
  margin-inline: auto;
  padding-inline: var(--grid-padding);
}

.blog-hero__kicker {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-success);
  margin-bottom: var(--space-4);
  align-items: center;
  gap: var(--space-2);
}

.blog-hero__kicker svg {
  width: 14px;
  height: 14px;
}

.blog-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-3);
  max-width: 25ch;
}

.blog-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 700px;
  margin-bottom: var(--space-6);
}

/* ═══════════════════════════════════════════════════════════════
 * BREADCRUMB
 * ═══════════════════════════════════════════════════════════════ */

.blog-breadcrumb {
  margin-bottom: var(--space-6);
}

.blog-breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.blog-breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.blog-breadcrumb__item + .blog-breadcrumb__item::before {
  content: '/';
  color: var(--color-border-strong);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.blog-breadcrumb__link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-disabled);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.blog-breadcrumb__link:hover {
  color: var(--color-text-muted);
}

.blog-breadcrumb__current {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
}

/* ═══════════════════════════════════════════════════════════════
 * 2. MAIN BLOG GRID & FILTERS
 * ═══════════════════════════════════════════════════════════════ */

.blog-section {
  padding-block: var(--space-section);
  border-bottom: 1px solid var(--color-border-default);
}

.blog-section__inner {
  max-width: var(--grid-max);
  margin-inline: auto;
  padding-inline: var(--grid-padding);
}

/* Search & Filter Nav */
.blog-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
}

.blog-filter {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.blog-filter__btn {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast);
}

.blog-filter__btn:hover,
.blog-filter__btn[aria-pressed="true"] {
  background: var(--color-text-primary);
  color: var(--color-bg-base);
  border-color: var(--color-text-primary);
}

.blog-search {
  position: relative;
}

.blog-search__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  stroke: var(--color-text-disabled);
  fill: none;
}

.blog-search__input {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  padding: 0.5rem 1rem 0.5rem 2.5rem;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  width: 100%;
  max-width: 250px;
  transition: border-color var(--duration-fast);
}

.blog-search__input:focus {
  outline: none;
  border-color: var(--color-success);
}

/* Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-8);
}

/* Featured Article full width */
.blog-grid > .blog-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (max-width: 768px) {
  .blog-grid > .blog-card--featured {
    grid-template-columns: 1fr;
  }
}

/* Article Card */
.blog-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  background: var(--color-bg-base);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  overflow: hidden;
  transition: transform var(--duration-fast), box-shadow var(--duration-fast);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-card__image-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-default);
  background: var(--color-bg-surface);
}

.blog-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.blog-card:hover .blog-card__img {
  transform: scale(1.05);
}

.blog-card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-disabled);
}

.blog-card__category {
  color: var(--color-success);
  background: var(--color-success-bg);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-success-border);
}

.blog-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.blog-card__link {
  color: inherit;
  text-decoration: none;
}

.blog-card__link:focus,
.blog-card__link:hover {
  text-decoration: underline;
  text-decoration-color: var(--color-border-strong);
}

.blog-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.blog-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-border-default);
  padding-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.blog-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ═══════════════════════════════════════════════════════════════
 * SCROLL REVEAL
 * ═══════════════════════════════════════════════════════════════ */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out-expo), transform var(--duration-slow) var(--ease-out-expo);
}

[data-reveal][data-delay="1"] { transition-delay: 80ms; }
[data-reveal][data-delay="2"] { transition-delay: 160ms; }
[data-reveal][data-delay="3"] { transition-delay: 240ms; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}