/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--fs-sm);
  border: 1px solid transparent;
  transition: background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
  min-height: 44px; /* touch target */
  text-decoration: none;
  line-height: 1;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-primary-500);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-600); color: #fff; }
.btn-secondary {
  background: transparent;
  border-color: var(--color-ink-900);
  color: var(--color-ink-900);
}
.btn-secondary:hover { background: var(--color-ink-900); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--color-primary-500);
  padding-inline: var(--space-3);
}
.btn-ghost:hover { background: var(--color-primary-100); }
.btn-block { width: 100%; }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.3em 0.65em;
  border-radius: var(--radius-sm);
  background: var(--color-primary-100);
  color: var(--color-primary-600);
  font-weight: 600;
}
.badge-accent { background: var(--color-accent-100); color: var(--color-accent-500); }
.badge-updated { background: var(--color-neutral-100); color: var(--color-neutral-600); }

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--duration-base) var(--ease-standard),
              border-color var(--duration-base) var(--ease-standard);
}
.card:hover { box-shadow: var(--shadow-md); border-color: var(--color-neutral-200); }
.card-media {
  aspect-ratio: 16 / 9;
  background: var(--color-neutral-100);
  overflow: hidden;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-media figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-xs);
  color: var(--color-neutral-600);
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
}
.card-body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.card-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-neutral-600);
}
.card-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  line-height: var(--lh-heading);
}
.card-title a { color: var(--color-ink-900); text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); }
.card-title a:hover { color: var(--color-primary-500); }
.card-excerpt { color: var(--color-neutral-600); font-size: var(--fs-sm); flex: 1; }
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-neutral-400);
  font-family: var(--font-mono);
}

/* ---- Alerts / callouts ---- */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-block: var(--space-6);
}
.alert-icon { flex-shrink: 0; width: 22px; height: 22px; margin-top: 2px; }
.alert-title { font-weight: 700; margin-bottom: var(--space-1); font-family: var(--font-body); }
.alert-info { background: var(--color-primary-100); border-color: var(--color-primary-500); }
.alert-warn { background: var(--color-warn-100); border-color: var(--color-warn-600); }
.alert-tip { background: var(--color-accent-100); border-color: var(--color-accent-500); }

/* ---- Stat callout ---- */
.stat-callout {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-5);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.stat-callout .stat-figure {
  font-family: var(--font-mono);
  font-size: var(--fs-h2);
  font-weight: 600;
  color: var(--color-ink-900);
  font-variant-numeric: tabular-nums;
}
.stat-callout .stat-label { color: var(--color-neutral-600); font-size: var(--fs-sm); }
.stat-callout .stat-source { font-size: var(--fs-xs); color: var(--color-neutral-600); }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; margin-block: var(--space-6); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.table { font-size: var(--fs-sm); min-width: 480px; }
.table caption { text-align: left; padding: var(--space-4); font-weight: 600; color: var(--color-ink-900); border-bottom: 1px solid var(--color-border); }
.table th, .table td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--color-border); }
.table th { background: var(--color-surface-alt); font-family: var(--font-mono); font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-neutral-600); position: sticky; top: 0; }
.table td.numeric, .table th.numeric { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--color-surface-alt); }

/* ---- Breadcrumb ---- */
.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2); font-size: var(--fs-xs); padding: 0; color: var(--color-neutral-600); }
.breadcrumb li { display: flex; align-items: center; gap: var(--space-2); }
.breadcrumb li:not(:last-child)::after { content: "/"; color: var(--color-neutral-200); }
.breadcrumb a { color: var(--color-neutral-600); text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); }
.breadcrumb a:hover { color: var(--color-primary-500); }
.breadcrumb [aria-current="page"] { color: var(--color-neutral-900); }

/* ---- Table of contents ---- */
.toc { background: var(--color-surface-alt); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-5); }
.toc-title { font-family: var(--font-mono); font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-neutral-600); margin-bottom: var(--space-3); }
.toc ol { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a { text-decoration: none; color: var(--color-neutral-900); font-size: var(--fs-sm); display: flex; gap: var(--space-2); }
.toc a::before { content: counter(toc, decimal-leading-zero); font-family: var(--font-mono); color: var(--color-neutral-400); }
.toc a:hover, .toc a[aria-current="true"] { color: var(--color-primary-500); }

/* ---- FAQ ---- */
.faq-item { border-bottom: 1px solid var(--color-border); padding-block: var(--space-4); }
.faq-item summary {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-ink-900);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--color-primary-500);
  font-size: var(--fs-xl);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: var(--space-3); color: var(--color-neutral-600); }

/* ---- Author byline ---- */
.author-byline { display: flex; align-items: center; gap: var(--space-3); }
.author-byline img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.author-byline .name { font-weight: 600; color: var(--color-ink-900); font-size: var(--fs-sm); }
.author-byline .meta { color: var(--color-neutral-400); font-size: var(--fs-xs); font-family: var(--font-mono); }

/* ---- Pull quote ---- */
.pull-quote {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: var(--lh-heading);
  color: var(--color-ink-900);
  border-left: 3px solid var(--color-accent-500);
  padding-left: var(--space-5);
  margin-block: var(--space-7);
  font-style: italic;
}

/* ---- Axis rule (signature divider) ---- */
.axis-rule {
  --tick-color: var(--color-neutral-200);
  height: 9px;
  background-image: repeating-linear-gradient(
    to right, var(--tick-color) 0 1px, transparent 1px 24px
  );
  background-position: bottom;
  background-repeat: repeat-x;
  background-size: auto 9px;
  border-bottom: 1px solid var(--color-border);
  margin-block: var(--space-8);
}

/* ---- Forms ---- */
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.field label { font-weight: 600; font-size: var(--fs-sm); color: var(--color-ink-900); }
.field .hint { font-size: var(--fs-xs); color: var(--color-neutral-400); }
.field input, .field select, .field textarea {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-neutral-900);
  caret-color: var(--color-primary-500);
  font-size: var(--fs-base);
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}
.field input::placeholder, .field textarea::placeholder,
.search-field::placeholder {
  color: var(--color-neutral-400);
  opacity: 1;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
  outline: none;
}

/* Standalone search inputs (not wrapped in .field, e.g. the search page
   and any future header search box) get the same explicit treatment.
   type="search" specifically needs -webkit-appearance reset — Safari/iOS
   otherwise applies native OS chrome that can ignore author background
   and text-color styling, which is what causes "invisible" typed text. */
.search-field {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-neutral-900);
  caret-color: var(--color-primary-500);
  font-size: var(--fs-base);
  font-family: var(--font-body);
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}
.search-field:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
  outline: none;
}
/* Reset WebKit's native search-field decorations so our own styling is
   what actually renders, on both the field and its cancel ("x") button. */
.search-field::-webkit-search-decoration,
.search-field::-webkit-search-cancel-button,
.search-field::-webkit-search-results-button,
.search-field::-webkit-search-results-decoration {
  -webkit-appearance: none;
  appearance: none;
}
.field textarea { min-height: 120px; resize: vertical; }

/* ---- Pagination ---- */
.pagination { display: flex; gap: var(--space-2); justify-content: center; list-style: none; padding: 0; margin-top: var(--space-7); }
.pagination a, .pagination span {
  display: flex; align-items: center; justify-content: center;
  min-width: 44px; min-height: 44px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-neutral-600);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}
.pagination a:hover { background: var(--color-primary-100); }
.pagination [aria-current="page"] { background: var(--color-ink-900); color: #fff; }

/* ---- Reading progress bar ---- */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px;
  background: var(--color-accent-500);
  width: 0%;
  z-index: 60;
  transition: width var(--duration-fast) linear;
}

/* ---- Back to top ---- */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-ink-900);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard);
  border: none;
  z-index: 50;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }

/* ---- Newsletter ---- */
.newsletter-form { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.newsletter-form input[type="email"] { flex: 1; min-width: 220px; }