/* ==========================================================================
   components.css — Shared UI Components
   Portfolio, Blog, About, Contact page components
   ========================================================================== */

/* ── Scroll Reveal Animation ────────────────────────────────
   .reveal-up: initial hidden state
   .reveal-up.revealed: final visible state
   --delay custom property allows per-element stagger
   ─────────────────────────────────────────────────────────── */
.reveal-up {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--delay, 0ms);
}

.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* When JS hasn't loaded yet — show everything */
html:not([data-js-ready]) .reveal-up {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Page Header ─────────────────────────────────────────── */
.pf-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* ── Filter Bar ──────────────────────────────────────────── */
.pf-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  align-self: flex-start;
}

.pf-filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all 0.18s ease;
  cursor: pointer;
  white-space: nowrap;
}

.pf-filter-pill:hover {
  color: var(--color-text-main);
  background: var(--color-surface-white);
}

.pf-filter-pill--active {
  background: var(--color-surface-white);
  color: var(--color-text-main);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ── Project row: meta line ──────────────────────────────── */
.pf-project-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pf-project-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ── Pagination ──────────────────────────────────────────── */
.pf-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
  margin-top: 1rem;
}

.pf-page-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  text-decoration: none;
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-white);
  transition: all 0.18s ease;
  cursor: pointer;
}

.pf-page-btn:hover {
  border-color: var(--color-text-main);
  background: var(--color-surface-soft);
}

.pf-page-info {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  min-width: 56px;
  text-align: center;
}

/* ── Empty State ─────────────────────────────────────────── */
.pf-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 5rem 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.pf-empty svg {
  opacity: 0.35;
  margin-bottom: 0.5rem;
}

.pf-empty-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin: 0;
}

/* ── Portfolio Detail ────────────────────────────────────── */
.pf-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 2.5rem;
  transition: color 0.18s ease;
  cursor: pointer;
}

.pf-back-link:hover {
  color: var(--color-primary);
}

.pf-detail-hero {
  margin-bottom: 2.5rem;
}

.pf-detail-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 0.75rem;
}

.pf-detail-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.pf-detail-title {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.pf-detail-lead {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 680px;
  margin-bottom: 1.5rem;
}

.pf-tech-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Cover image */
.pf-cover-wrap {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 4rem;
  box-shadow: var(--shadow-md);
  background: var(--color-surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pf-cover-img {
  width: 100%;
  height: auto;
  max-height: 650px;
  object-fit: contain;
  display: block;
}

/* Two-column grid */
.pf-detail-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}

.pf-detail-body {
  min-width: 0;
}

.pf-prose {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  color: var(--color-text-body);
  line-height: 1.85;
  white-space: pre-line;
  margin-bottom: 2.5rem;
}

/* Case-study section headings (Layers 2-4) */
.pf-h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin: 2.5rem 0 1rem;
}

/* ── Linear Architecture / Workflow Pipeline ─────────────── */
.pf-linear-flow {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.65rem;
  margin: 1.75rem 0 2.5rem;
  padding: 1.25rem;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.pf-flow-item {
  flex: 1;
  min-width: 135px;
  background: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 0.85rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.pf-flow-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
  border-color: var(--color-primary);
}

.pf-flow-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.pf-flow-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.pf-flow-icon {
  font-size: 1.1rem;
}

.pf-flow-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin: 0 0 0.35rem;
  line-height: 1.35;
}

.pf-flow-desc {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0;
}

.pf-flow-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  opacity: 0.6;
  flex-shrink: 0;
}

@media (max-width: 860px) {
  .pf-linear-flow {
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.25rem;
  }

  .pf-flow-connector {
    transform: rotate(90deg);
    padding: 0.2rem 0;
  }

  .pf-flow-item {
    min-width: unset;
    width: 100%;
  }
}

/* Technical challenges & solutions (Layer 3) */
.pf-challenges {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.pf-challenge-card {
  background: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.pf-challenge-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.9rem;
  color: var(--color-text-main);
}

.pf-challenge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 640px) {
  .pf-challenge-grid {
    grid-template-columns: 1fr;
  }
}

.pf-challenge-col p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin: 0;
}

.pf-challenge-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.pf-challenge-label--problem {
  color: #b45309;
  background: rgba(180, 83, 9, 0.1);
}

.pf-challenge-label--solution {
  color: #15803d;
  background: rgba(21, 128, 61, 0.1);
}

.pf-challenge-impact {
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* Detail action buttons */
.pf-detail-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
}

.pf-detail-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.18s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.pf-detail-btn--primary {
  background: var(--color-text-main);
  color: #fff;
  border-color: var(--color-text-main);
}
.pf-detail-btn--primary:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.pf-detail-btn--ghost {
  background: var(--color-surface-white);
  color: var(--color-text-main);
  border-color: var(--color-border);
}
.pf-detail-btn--ghost:hover {
  border-color: var(--color-text-main);
  background: var(--color-surface-soft);
}

.pf-detail-btn--subtle {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}
.pf-detail-btn--subtle:hover {
  color: var(--color-text-main);
  background: var(--color-surface-soft);
}

/* Sidebar */
.pf-sidebar {
  position: sticky;
  top: 96px;
}

.pf-sidebar-card {
  background: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.pf-sidebar-heading {
  font-family: var(--font-body);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.pf-sidebar-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.pf-sidebar-row:first-of-type {
  border-top: 1px solid var(--color-border);
}

.pf-sidebar-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.pf-sidebar-value {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-main);
}

.pf-sidebar-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.pf-sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 1.25rem;
}

/* ── Blog Grid ───────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 3rem;
}

.blog-card {
  background: var(--color-surface-white);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease;
  cursor: pointer;
}

.blog-card:hover {
  background: var(--color-surface-soft);
}

.blog-card-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.blog-card:hover .blog-card-img {
  transform: scale(1.03);
}

.blog-card-img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.blog-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.5rem;
}

.blog-card-title {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.35;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
  flex: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.blog-card-author,
.blog-card-views {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ── Blog Post ───────────────────────────────────────────── */
.blog-post-header {
  margin-bottom: 2.5rem;
}

.blog-post-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.blog-post-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.blog-post-title {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

/* Long-form prose styles */
.blog-prose {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  color: var(--color-text-body);
  line-height: 1.85;
  margin-bottom: 3rem;
}

.blog-prose h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.blog-prose h3 {
  font-size: 1.2rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.blog-prose p {
  margin-bottom: 1.25rem;
}

.blog-prose ul,
.blog-prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.blog-prose li {
  margin-bottom: 0.4rem;
}

.blog-prose pre {
  background: var(--color-text-main);
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  line-height: 1.65;
}

.blog-prose code:not(pre code) {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
  color: var(--color-primary);
}

.blog-prose blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.blog-prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-primary-border);
  text-underline-offset: 3px;
}

.blog-prose a:hover {
  text-decoration-color: var(--color-primary);
}

/* ── Comments ─────────────────────────────────────────────── */
.blog-comments {
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
}

.blog-comments-title {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.blog-comments-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 1.25rem;
}

.blog-comments-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 8px;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.blog-alert {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.125rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.blog-alert--success {
  background: #ECFDF5;
  border: 1px solid #6EE7B7;
  color: #065F46;
}

.blog-comment-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 2.5rem;
}

.blog-comment {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.blog-comment:first-child {
  border-top: 1px solid var(--color-border);
}

.blog-comment-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.blog-comment-avatar {
  width: 34px;
  height: 34px;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-main);
  flex-shrink: 0;
}

.blog-comment-name {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-main);
  display: block;
}

.blog-comment-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: 0.5rem;
}

.blog-comment-body {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-body);
  line-height: 1.7;
  margin: 0;
  padding-left: calc(34px + 0.75rem);
}

/* Comment form */
.blog-comment-form-wrap {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.blog-comment-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.blog-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.blog-form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.blog-form-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.blog-form-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-main);
  background: var(--color-surface-white);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  outline: none;
}

.blog-form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.blog-form-textarea {
  resize: vertical;
  min-height: 120px;
}

.blog-form-error {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--color-danger);
  display: block;
}

/* Related posts in sidebar */
.blog-related-list {
  display: flex;
  flex-direction: column;
}

.blog-related-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.18s ease;
}

.blog-related-item:first-child {
  border-top: 1px solid var(--color-border);
}

.blog-related-item:hover .blog-related-title {
  color: var(--color-primary);
}

.blog-related-title {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.4;
  transition: color 0.18s ease;
}

.blog-related-author {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ── About Page ──────────────────────────────────────────── */
.about-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-values-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.about-value-cell {
  background: var(--color-surface-white);
  padding: 1.75rem 1.5rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-value-cell:nth-child(2),
.about-value-cell:nth-child(4) {
  border-right: none;
}

.about-value-cell:nth-child(3),
.about-value-cell:nth-child(4) {
  border-bottom: none;
}

.about-value-icon {
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  display: block;
}

.about-value-title {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.4rem;
}

.about-value-desc {
  font-family: var(--font-body);
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
}

/* Stats row */
.about-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 2rem 1.75rem;
  background: var(--color-surface-white);
  border-right: 1px solid var(--color-border);
}

.about-stat:last-child {
  border-right: none;
}

.about-stat-num {
  font-family: 'Space Grotesk', var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.03em;
  line-height: 1;
}

.about-stat-label {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Timeline */
.about-timeline {
  max-width: 640px;
}

.about-timeline-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.about-timeline-item:first-child {
  border-top: 1px solid var(--color-border);
}

.about-timeline-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  padding-top: 3px;
  min-width: 38px;
}

.about-timeline-title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

.about-timeline-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
}

/* ── Contact Page ────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.contact-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact-input {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-main);
  background: var(--color-surface-white);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  outline: none;
}

.contact-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.contact-textarea {
  resize: vertical;
  min-height: 130px;
}

.contact-error {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--color-danger);
  display: block;
}

.contact-alert {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.125rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 2rem;
  max-width: 600px;
}

.contact-alert--success {
  background: #ECFDF5;
  border: 1px solid #6EE7B7;
  color: #065F46;
}

/* ── Site footer ─────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-white);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.75rem 0;
}

.footer-copyright {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: 0;
}

.footer-built {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-built:hover {
  color: var(--color-text-main);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .pf-detail-grid {
    grid-template-columns: 1fr 280px;
    gap: 2.5rem;
  }

  .about-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-stat:nth-child(2) {
    border-right: none;
  }

  .about-stat:nth-child(3) {
    border-top: 1px solid var(--color-border);
  }
}

@media (max-width: 768px) {
  .pf-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }

  .pf-filter-bar {
    width: 100%;
  }

  .pf-detail-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .pf-sidebar {
    position: static;
  }

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

  .about-hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-values-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-stats-row {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-form-row {
    grid-template-columns: 1fr;
  }

  .blog-form-row {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .about-values-grid {
    grid-template-columns: 1fr;
  }

  .about-value-cell {
    border-right: none !important;
  }

  .about-stats-row {
    grid-template-columns: 1fr 1fr;
  }

  .blog-post-meta-row {
    gap: 0.75rem;
  }
}

/* ── Portfolio filters (category row + collapsible tech list) ── */
.pf-page-header {
  flex-direction: column;
  align-items: stretch;
  gap: 1.75rem;
}

.pf-filters {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  min-width: 0;
}

.pf-filter-pill {
  min-height: 36px;
}

.pf-tech-filter {
  width: 100%;
}

.pf-tech-summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-white);
  color: var(--color-text-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.pf-tech-summary::-webkit-details-marker { display: none; }

.pf-tech-summary:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-main);
}

.pf-tech-count,
.pf-tech-active {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  padding: 0 7px;
  border-radius: var(--radius-full);
  background: var(--color-surface-soft);
  color: var(--color-text-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.pf-tech-active {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.pf-tech-chevron {
  transition: transform 0.2s ease;
}

.pf-tech-filter[open] .pf-tech-chevron {
  transform: rotate(180deg);
}

.pf-tech-filter .pf-filter-bar {
  margin-top: 0.75rem;
}

@media (max-width: 768px) {
  .pf-page-header {
    gap: 1.25rem;
  }

  .pf-filters {
    width: 100%;
  }

  /* Category pills: one swipeable row instead of a tall wrapped block */
  .pf-filter-bar--scroll {
    flex-wrap: nowrap;
    overflow-x: auto;
    width: 100%;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
  }

  .pf-filter-bar--scroll::-webkit-scrollbar { display: none; }

  .pf-filter-bar--scroll .pf-filter-pill {
    flex-shrink: 0;
    scroll-snap-align: start;
  }

  .pf-tech-summary {
    width: 100%;
  }

  .pf-tech-summary .pf-tech-chevron {
    margin-inline-start: auto;
  }
}

/* ── About stats: logical borders (RTL-safe) + no overflow on narrow screens ── */
.about-stats-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.about-stat {
  min-width: 0;
  border-right: none;
  border-inline-end: 1px solid var(--color-border);
}

.about-stat:last-child {
  border-inline-end: none;
}

.about-stat-label {
  overflow-wrap: anywhere;
}

@media (max-width: 1024px) {
  .about-stats-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-stat:nth-child(2n) {
    border-inline-end: none;
  }

  .about-stat:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }
}

@media (max-width: 480px) {
  .about-stat {
    padding: 1.25rem 1rem;
  }

  .about-stat-num {
    font-size: 1.6rem;
  }
}