/* ==========================================================================
   blog.css — Blog page styles
   --------------------------------------------------------------------------
   Uses tokens from style.css (--bg, --text, --accent, --font-body, etc).
   ========================================================================== */

/* ==========================================================================
   SECTION LAYOUT
   ========================================================================== */
.blog-section {
  padding: 120px 0 80px;
  min-height: 100vh;
}

.blog-heading {
  font-weight: 800;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.15;
  color: var(--text);
  margin: 20px 0 36px;
  letter-spacing: -0.02em;
}

/* Eyebrow shared pattern */
.about-eyebrow-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.eyebrow {
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  text-transform: uppercase;
  white-space: nowrap;
}

.eyebrow-rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ==========================================================================
   SEARCH
   ========================================================================== */
.blog-search-wrap {
  position: relative;
  max-width: 440px;
  margin-bottom: 24px;
}

.blog-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-faint);
  pointer-events: none;
}

.blog-search {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.blog-search::placeholder {
  color: var(--text-faint);
}

.blog-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

[data-theme="light"] .blog-search {
  background: #fff;
}

/* ==========================================================================
   FILTERS
   ========================================================================== */
.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}

.blog-filter-btn {
  padding: 7px 16px;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.blog-filter-btn:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.blog-filter-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

/* ==========================================================================
   GRID
   ========================================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 20px;
  font-size: 15px;
  color: var(--text-faint);
}

/* ==========================================================================
   CARD
   ========================================================================== */
.blog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: pointer;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  outline: none;
}

.blog-card:hover,
.blog-card:focus-visible {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.blog-card:focus-visible {
  box-shadow: 0 0 0 2px var(--accent);
}

.blog-card-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.blog-card-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.blog-card-meta--sep {
  font-size: 10px;
  opacity: 0.5;
}

.blog-card-tag {
  margin-left: auto;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.blog-card-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
  margin: 4px 0 0;
}

.blog-card-excerpt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  padding-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.2s ease;
}

.blog-card:hover .blog-card-link {
  gap: 8px;
}

.blog-card-arrow {
  font-size: 16px;
  transition: transform 0.2s ease;
}

.blog-card:hover .blog-card-arrow {
  transform: translateX(2px);
}

/* ==========================================================================
   MODAL OVERLAY
   ========================================================================== */
.blog-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 20px;
  overflow-y: auto;

  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.blog-modal-overlay.is-opening {
  display: flex;
  opacity: 0;
  visibility: visible;
}

.blog-modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.blog-modal-overlay.is-closing {
  opacity: 0;
  visibility: visible;
}

[data-theme="light"] .blog-modal-overlay {
  background: rgba(0, 0, 0, 0.4);
}

@media (prefers-reduced-motion: reduce) {
  .blog-modal-overlay {
    transition: none;
  }
}

/* ==========================================================================
   MODAL CARD
   ========================================================================== */
.blog-modal {
  width: 100%;
  max-width: 760px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 80px);
  overflow: hidden;

  transform: scale(0.96) translateY(10px);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.blog-modal-overlay.is-open .blog-modal {
  transform: scale(1) translateY(0);
}

.blog-modal-overlay.is-closing .blog-modal {
  transform: scale(0.96) translateY(10px);
}

[data-theme="light"] .blog-modal {
  background: #fff;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15);
}

@media (prefers-reduced-motion: reduce) {
  .blog-modal {
    transition: none;
  }
}

/* ==========================================================================
   MODAL HEADER
   ========================================================================== */
.blog-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px 16px;
  flex-shrink: 0;
}

.blog-modal-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.blog-modal-tag {
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.blog-modal-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.blog-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  flex-shrink: 0;
}

.blog-modal-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border-color: var(--border-strong);
}

[data-theme="light"] .blog-modal-close:hover {
  background: rgba(0, 0, 0, 0.06);
}

/* ==========================================================================
   READING PROGRESS BAR
   ========================================================================== */
.blog-modal-progress-track {
  height: 3px;
  background: var(--border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.blog-modal-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
  transition: width 0.1s linear;
  will-change: width;
}

/* ==========================================================================
   MODAL BODY (scrollable)
   ========================================================================== */
.blog-modal-body {
  overflow-y: auto;
  padding: 28px 36px 48px;
  flex: 1;
}

.blog-modal-body::-webkit-scrollbar {
  width: 6px;
}

.blog-modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.blog-modal-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 3px;
}

.blog-modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .blog-modal-body::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .blog-modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.18);
}

/* ==========================================================================
   MODAL CONTENT TYPOGRAPHY
   ========================================================================== */
.blog-modal-title {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  margin: 0 0 32px;
  letter-spacing: -0.02em;
}

.blog-modal-content p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.blog-modal-content strong {
  color: var(--text);
  font-weight: 600;
}

.blog-modal-content em {
  font-style: italic;
}

.blog-modal-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.blog-modal-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin: 32px 0 12px;
}

.blog-modal-content ol,
.blog-modal-content ul {
  margin: 0 0 20px;
  padding-left: 24px;
}

.blog-modal-content li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.blog-modal-content li strong {
  color: var(--text);
}

.blog-modal-content code {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent);
}

[data-theme="light"] .blog-modal-content code {
  background: rgba(0, 0, 0, 0.06);
}

.blog-modal-content pre {
  margin: 0 0 24px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  overflow-x: auto;
}

[data-theme="light"] .blog-modal-content pre {
  background: #1e1e2e;
  border-color: rgba(255, 255, 255, 0.06);
}

.blog-modal-content pre code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #e0e0e0;
  background: none;
  padding: 0;
  border-radius: 0;
  white-space: pre;
  display: block;
}

/* Syntax highlighting keywords in code blocks */
.blog-modal-content pre code .kw {
  color: var(--accent);
  font-weight: 600;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .blog-section {
    padding: 100px 0 60px;
  }

  .blog-heading {
    font-size: clamp(24px, 6vw, 32px);
  }

  .blog-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .blog-search-wrap {
    max-width: 100%;
  }

  .blog-filters {
    gap: 6px;
  }

  .blog-filter-btn {
    padding: 6px 12px;
    font-size: 12px;
    min-height: 36px;
  }

  .blog-card {
    padding: 20px;
  }

  .blog-card-title {
    font-size: 16px;
  }

  .blog-card-link {
    min-height: 44px;
  }

  /* Modal — full screen on mobile */
  .blog-modal-overlay {
    padding: 0;
    align-items: stretch;
  }

  .blog-modal {
    max-width: 100%;
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
    border: none;
  }

  .blog-modal-header {
    padding: 16px 20px 12px;
  }

  .blog-modal-close {
    width: 40px;
    height: 40px;
    min-width: 44px;
    min-height: 44px;
  }

  .blog-modal-body {
    padding: 20px 20px 40px;
  }

  .blog-modal-title {
    font-size: 24px;
  }

  .blog-modal-content h2 {
    font-size: 19px;
  }

  .blog-modal-content h3 {
    font-size: 16px;
  }

  .blog-modal-content pre {
    padding: 14px 16px;
    margin-left: -20px;
    margin-right: -20px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .blog-modal-content p,
  .blog-modal-content li {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .blog-section {
    padding: 80px 0 40px;
  }

  .blog-search {
    font-size: 16px;
  }
}