/*
 * impeccable.style — shared styles for sub-pages and the site-wide header
 *
 * Imported by all generated pages under /skills, /anti-patterns, /tutorials,
 * and by the hand-authored pages (index, cheatsheet, gallery, privacy) via
 * a direct <link> tag so they all share the same header + prose typography.
 */

@import "./tokens.css";

/* ============================================
   SKIP LINK (a11y)
   ============================================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-ink);
  color: var(--color-paper);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================
   BASE
   ============================================ */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ============================================
   SHARED SITE HEADER
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: 14px clamp(var(--spacing-md), 4vw, var(--spacing-2xl));
  background: color-mix(in oklch, var(--color-paper) 94%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid var(--color-mist);
}

/* Kill any inherited text-decoration from page-level `a` rules. */
.site-header a,
.site-header a:hover {
  text-decoration: none;
  text-decoration-thickness: 0;
}

.site-header-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  flex-shrink: 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.site-header-brand:hover {
  color: var(--color-accent);
}

.site-header-brand-logo {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  flex-shrink: 0;
}

.site-header-brand-name {
  display: inline-block;
}

.site-header-right {
  display: flex;
  align-items: center;
  gap: clamp(var(--spacing-sm), 2vw, var(--spacing-md));
  min-width: 0;
}

.site-header-nav {
  display: flex;
  align-items: center;
  gap: clamp(var(--spacing-sm), 2vw, var(--spacing-md));
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  min-width: 0;
}

.site-header-nav a {
  position: relative;
  display: inline-block;
  white-space: nowrap;
  color: var(--color-charcoal);
  padding: 4px 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.site-header-nav a:hover {
  color: var(--color-accent);
}

.site-header-nav a[aria-current="page"] {
  color: var(--color-ink);
  font-weight: 600;
}

.site-header-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* GitHub star pill — subtle, inviting nudge without shouting */
.site-header-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 8px;
  border-radius: 99px;
  background: var(--color-cream);
  border: 1px solid var(--color-mist);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-charcoal);
  flex-shrink: 0;
  transition:
    background var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.site-header-github svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.site-header-github:hover {
  background: var(--color-paper);
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.site-header-github-star {
  color: #f59e0b;
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

@media (max-width: 820px) {
  .site-header {
    padding: 12px var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .site-header-brand {
    font-size: 1.0625rem;
  }

  .site-header-brand-logo {
    width: 22px;
    height: 22px;
  }

  .site-header-right {
    gap: var(--spacing-sm);
  }

  .site-header-nav {
    font-size: 0.8125rem;
    gap: var(--spacing-sm);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    /* fade the right edge so users see there's more to scroll */
    mask-image: linear-gradient(to right, black 0%, black calc(100% - 24px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, black 0%, black calc(100% - 24px), transparent 100%);
  }

  .site-header-nav::-webkit-scrollbar {
    display: none;
  }

  .site-header-nav a[data-nav="home"] {
    /* Brand already acts as home link on mobile */
    display: none;
  }

  .site-header-github {
    padding: 4px 8px;
  }

  .site-header-github-label {
    display: none;
  }
}

@media (max-width: 480px) {
  .site-header-brand-name {
    /* Logo alone on narrow screens */
    display: none;
  }
}

/* ============================================
   SUB-PAGE LAYOUT SHELL
   ============================================ */

main#main {
  display: block;
}

.sub-page-content {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.25rem, 4vw, 2.5rem) 6rem;
}

.skill-detail {
  max-width: 720px;
}

.sub-page-header {
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.sub-page-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.sub-page-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
}

.sub-page-lede {
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  color: var(--color-charcoal);
  max-width: 62ch;
}

/* ============================================
   DOCS-BROWSER LAYOUT (used by /skills)
   ============================================ */

:root {
  --site-header-height: 62px;
  --skills-sidebar-width: 200px;
}

.skills-layout-page main#main {
  /* Reset: the docs layout provides its own max-width container. */
  max-width: none;
  margin: 0;
  padding: 0;
}

.skills-layout {
  display: grid;
  grid-template-columns: var(--skills-sidebar-width) minmax(0, 1fr);
  gap: clamp(var(--spacing-lg), 4vw, var(--spacing-2xl));
  /*
   * Match horizontal padding to .site-header so the sidebar content lines
   * up with the brand logo in the nav bar above. Intentionally no max-width
   * so the docs-browser feels wall-to-wall on wide screens.
   */
  padding: 0 clamp(var(--spacing-md), 4vw, var(--spacing-2xl));
  align-items: start;
}

/* ============================================
   SIDEBAR
   ============================================ */

.skills-sidebar {
  position: sticky;
  top: var(--site-header-height);
  align-self: start;
  max-height: calc(100vh - var(--site-header-height));
  overflow-y: auto;
  padding: var(--spacing-lg) 0 var(--spacing-2xl);
  border-right: 1px solid var(--color-mist);
  scrollbar-width: thin;
  scrollbar-color: var(--color-mist) transparent;
}

.skills-sidebar::-webkit-scrollbar {
  width: 6px;
}

.skills-sidebar::-webkit-scrollbar-thumb {
  background: var(--color-mist);
  border-radius: 3px;
}

.skills-sidebar-inner {
  padding-right: var(--spacing-md);
}

/* Label at the top of the sidebar — hidden visually, kept for a11y tree. */
.skills-sidebar-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skills-sidebar-group {
  margin-bottom: 1.5rem;
}

.skills-sidebar-group:last-child {
  margin-bottom: 0;
}

.skills-sidebar-group-title {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-ash);
  margin-bottom: 6px;
  padding: 0;
}

.skills-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skills-sidebar-list li {
  margin: 0;
}

.skills-sidebar-list a {
  display: block;
  /* No left padding: text starts at the column edge so it lines up with
     the header logo. The 2px active accent lives 2px to the left via a
     negative margin, sitting in the layout's horizontal padding gutter. */
  padding: 4px 0;
  margin-left: -2px;
  border-left: 2px solid transparent;
  padding-left: 2px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-charcoal);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.skills-sidebar-list a:hover {
  color: var(--color-accent);
}

.skills-sidebar-list a[aria-current="page"] {
  color: var(--color-ink);
  font-weight: 600;
  border-left-color: var(--color-accent);
}

/* ============================================
   OVERVIEW MAIN CONTENT
   ============================================ */

.skills-main {
  min-width: 0;
  padding: clamp(2rem, 4vw, 3.5rem) 0 clamp(4rem, 8vw, 6rem);
}

.skills-overview-content {
  max-width: 720px;
}

.skills-overview-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.skills-overview-header .sub-page-lede a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 4px;
  font-family: var(--font-mono);
  font-weight: 500;
}

.skills-overview-howto {
  padding: var(--spacing-lg) var(--spacing-lg);
  background: var(--color-cream);
  border: 1px solid var(--color-mist);
  border-radius: 10px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.skills-overview-howto-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--spacing-sm);
}

.skills-overview-howto p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-charcoal);
  max-width: 60ch;
}

.skills-overview-howto a {
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.875em;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  transition: color var(--duration-fast) var(--ease-out);
}

.skills-overview-howto a:hover {
  color: var(--color-accent);
}

.skills-overview-categories {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 4vw, 3rem);
}

.skills-overview-category {
  padding-bottom: clamp(2rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--color-mist);
}

.skills-overview-category:last-child {
  border-bottom: none;
}

.skills-overview-category-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: 6px;
}

.skills-overview-category-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  font-style: italic;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.skills-overview-category-count {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ash);
}

.skills-overview-category-desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-charcoal);
  max-width: 58ch;
  margin-bottom: var(--spacing-md);
}

.skills-overview-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skills-overview-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink);
  background: var(--color-paper);
  border: 1px solid var(--color-mist);
  border-radius: 99px;
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.skills-overview-chip:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-cream);
}

/* ============================================
   MOBILE: collapse sidebar into inline block
   ============================================ */

@media (max-width: 920px) {
  .skills-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .skills-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid var(--color-mist);
    padding: var(--spacing-md) 0 var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
  }

  .skills-sidebar-inner {
    padding-right: 0;
  }

  .skills-sidebar-group {
    margin-bottom: var(--spacing-md);
  }
}

/* ============================================
   SKILL DETAIL
   ============================================ */

.skill-detail-header {
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.skill-detail-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ash);
  margin-bottom: var(--spacing-sm);
}

.skill-detail-eyebrow a {
  color: inherit;
  text-decoration: none;
}

.skill-detail-eyebrow a:hover {
  color: var(--color-accent);
}

.skill-detail-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5.5vw, 5rem);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
  white-space: nowrap;
}

.skill-detail-title-slash {
  color: var(--color-accent);
  font-weight: 300;
}

.skill-detail-tagline {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  font-weight: 400;
  color: var(--color-charcoal);
  line-height: 1.55;
  max-width: 60ch;
  margin-bottom: var(--spacing-md);
}

.skill-meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--spacing-sm);
}

.skill-meta-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 99px;
  background: var(--color-cream);
  border: 1px solid var(--color-mist);
  color: var(--color-charcoal);
}

.skill-meta-category[data-category="create"] {
  background: var(--cat-create-bg);
  border-color: var(--cat-create-border);
  color: var(--cat-create-text);
}

.skill-meta-category[data-category="evaluate"] {
  background: var(--cat-evaluate-bg);
  border-color: var(--cat-evaluate-border);
  color: var(--cat-evaluate-text);
}

.skill-meta-category[data-category="refine"] {
  background: var(--cat-refine-bg);
  border-color: var(--cat-refine-border);
  color: var(--cat-refine-text);
}

.skill-meta-category[data-category="simplify"] {
  background: var(--cat-simplify-bg);
  border-color: var(--cat-simplify-border);
  color: var(--cat-simplify-text);
}

.skill-meta-category[data-category="harden"] {
  background: var(--cat-harden-bg);
  border-color: var(--cat-harden-border);
  color: var(--cat-harden-text);
}

.skill-meta-category[data-category="system"] {
  background: var(--cat-system-bg);
  border-color: var(--cat-system-border);
  color: var(--cat-system-text);
}

.skill-meta-args {
  font-family: var(--font-mono);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
}

.skill-detail-editorial {
  margin-bottom: clamp(3rem, 6vw, 4.5rem);
}

.skill-detail-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: clamp(3rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
}

.skill-detail-divider::before,
.skill-detail-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-mist);
}

.skill-detail-divider span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-ash);
  flex-shrink: 0;
}

.skill-references {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--color-mist);
}

.skill-references-heading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-style: italic;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--spacing-md);
}

.skill-reference {
  border-top: 1px solid var(--color-mist);
}

.skill-reference:last-child {
  border-bottom: 1px solid var(--color-mist);
}

.skill-reference > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: color var(--duration-fast) var(--ease-out);
}

.skill-reference > summary::-webkit-details-marker {
  display: none;
}

.skill-reference > summary::before {
  content: "+";
  flex-shrink: 0;
  width: 18px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-accent);
  line-height: 1;
  transition: transform var(--duration-base) var(--ease-out);
}

.skill-reference[open] > summary::before {
  transform: rotate(45deg);
}

.skill-reference > summary:hover {
  color: var(--color-accent);
}

.skill-reference-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ash);
  flex-shrink: 0;
}

.skill-reference-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-ink);
}

.skill-reference-body {
  padding: var(--spacing-sm) 0 var(--spacing-md) 34px;
  max-width: 62ch;
}

/* ============================================
   PROSE — rendered markdown bodies
   ============================================ */

.prose {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-charcoal);
  max-width: 65ch;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  color: var(--color-ink);
  font-weight: 600;
  line-height: 1.25;
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.prose h1 { font-family: var(--font-display); font-size: 1.875rem; font-weight: 500; font-style: italic; }
.prose h2 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 500; font-style: italic; margin-top: 2.2em; }
.prose h3 { font-size: 1.125rem; margin-top: 1.8em; }
.prose h4 { font-size: 1rem; }

.prose h2:first-child,
.prose h3:first-child {
  margin-top: 0;
}

.prose p {
  margin-top: 0;
  margin-bottom: 1.1em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2em 0;
  padding-left: 1.25rem;
}

.prose li {
  margin-bottom: 0.4em;
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-accent-dim);
  transition: text-decoration-color var(--duration-fast) var(--ease-out);
}

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

.prose strong {
  color: var(--color-ink);
  font-weight: 600;
}

.prose em {
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-cream);
  border: 1px solid var(--color-mist);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-ink);
}

.prose .code-block {
  margin: 1.25em 0;
  padding: var(--spacing-md);
  background: oklch(12% 0.005 350);
  color: oklch(92% 0.005 350);
  border-radius: 10px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.55;
  border: 1px solid oklch(20% 0.005 350);
}

.prose .code-block code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.prose blockquote {
  margin: 1.5em 0;
  padding: 0 0 0 var(--spacing-md);
  border-left: 3px solid var(--color-mist);
  color: var(--color-ash);
  font-style: italic;
}

.prose hr {
  border: none;
  height: 1px;
  background: var(--color-mist);
  margin: 2.5em 0;
}