/* ============================================================
   ARTICLES — NIGHT THEME
   Follows the portfolio's cinematic brutalist design system.
   Relies on CSS variables defined in portfolio.css.
   ============================================================ */

/* ── Page shell ── */
.content-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 5rem);
  padding-top: 2rem;
  min-height: 100vh;
}

/* ── Back link ── */
.articles-back-home {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--gray-600);
  text-decoration: none;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
  transition: color var(--dur-fast);
}
.articles-back-home:hover { color: var(--accent); }

/* ── Page header ── */
.article-header {
  border-bottom: 1px solid var(--gray-800);
  padding-bottom: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.article-title-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 300;
  color: var(--white);
  letter-spacing: -0.01em;
  line-height: 1.05;
  margin: 0;
}

.article-description {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--gray-600);
  text-align: center;
  margin: 0.5rem 0 2rem;
}

/* ── RSS link ── */
.rss-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 0.2rem 0.5rem;
  text-decoration: none;
  opacity: 0.6;
  transition: opacity var(--dur-fast);
  flex-shrink: 0;
}
.rss-link:hover { opacity: 1; color: var(--accent); }

/* ── Filters ── */
.filter-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
}

.filter-section {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--gray-600);
  text-transform: uppercase;
  white-space: nowrap;
}

.search-input,
.category-select,
.tag-select,
.lang-select {
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  color: var(--gray-200);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.4rem 0.75rem;
  border-radius: 2px;
  outline: none;
  transition: border-color var(--dur-fast);
  appearance: none;
  -webkit-appearance: none;
}

.search-input::placeholder { color: var(--gray-700); }

.search-input:focus,
.category-select:focus,
.tag-select:focus,
.lang-select:focus {
  border-color: var(--accent);
}

.category-select,
.tag-select,
.lang-select {
  cursor: none;
  padding-right: 1.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23555' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  background-size: 8px;
}

.category-select option,
.tag-select option,
.lang-select option {
  background: var(--gray-900);
  color: var(--gray-200);
}

/* ── Article grid ── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* ── Article card ── */
.article-card {
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  overflow: hidden;
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.5s var(--ease-out) forwards;
  transition: border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.article-card:hover {
  border-color: var(--gray-700);
  transform: translateY(-4px);
}

.article-img-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--gray-800);
}

.article-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur-med) var(--ease-out);
}

.article-card:hover .article-img { transform: scale(1.04); }

.article-content {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.article-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--white);
  line-height: 1.25;
  margin: 0;
}

.article-card-description {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--gray-400);
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-800);
}

.read-more-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.3rem 0.75rem;
  border-radius: 2px;
  text-decoration: none;
  opacity: 0.75;
  transition: opacity var(--dur-fast), background var(--dur-fast), color var(--dur-fast);
}
.read-more-btn:hover {
  opacity: 1;
  background: var(--accent);
  color: var(--black-rich);
}

.article-card-views {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--gray-700);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* ── Empty state ── */
.no-articles {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gray-600);
  padding: 4rem 0;
}

/* ── Loading spinner ── */
.loading-spinner {
  display: none;
  justify-content: center;
  align-items: center;
  margin: 3rem 0;
  width: 100%;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--gray-800);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Error / end-of-content ── */
.error-message {
  grid-column: 1 / -1;
  padding: 1.25rem;
  border-left: 3px solid #c0392b;
  background: rgba(192, 57, 43, 0.08);
  color: var(--gray-200);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  width: 100%;
}

.end-of-content {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gray-700);
  text-align: center;
  margin: 3rem 0;
  width: 100%;
}

/* ── Animations ── */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: 1fr;
  }

  .filter-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .article-title {
    font-size: 2.5rem;
  }
}