/* =========================================================================
   wayan.com/claude-skills
   Design system: Intercom-inspired warm cream canvas with sharp geometry.
   Single stylesheet, mobile-first.
   ========================================================================= */

/* --- Tokens ------------------------------------------------------------- */
:root {
  --color-canvas: #faf9f6;
  --color-surface: #ffffff;
  --color-text: #111111;
  --color-text-soft: #313130;
  --color-muted: #7b7b78;
  --color-border: #dedbd6;
  --color-accent: #ff5600;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --radius-button: 4px;
  --radius-card: 8px;

  --measure: 64ch;
}

/* --- Reset -------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

::selection {
  background: var(--color-accent);
  color: var(--color-surface);
}

/* --- Skip link ---------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -48px;
  left: 8px;
  background: var(--color-text);
  color: var(--color-surface);
  padding: 10px 14px;
  border-radius: var(--radius-button);
  text-decoration: none;
  font-size: 14px;
  z-index: 100;
}
.skip-link:focus {
  top: 8px;
}

/* --- Layout ------------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 32px;
  }
}

/* --- Header ------------------------------------------------------------- */
.site-header {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas);
}
.site-header .container {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.brand {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.4px;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1.0;
}
.brand:hover,
.brand:focus-visible {
  color: var(--color-accent);
}
.positioning {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-muted);
  max-width: 56ch;
}
.site-nav {
  font-size: 16px;
  padding-top: 2px;
}
.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  border-color: var(--color-text);
}

/* --- Hero (index) ------------------------------------------------------- */
.hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--color-border);
}
@media (min-width: 768px) {
  .hero {
    padding: 80px 0 56px;
  }
}
@media (min-width: 1024px) {
  .hero {
    padding: 96px 0 64px;
  }
}
.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 0 0 24px;
}
.hero h1 {
  font-size: 40px;
  line-height: 1.0;
  letter-spacing: -1.2px;
  font-weight: 500;
  margin: 0 0 24px;
  max-width: 16ch;
}
@media (min-width: 768px) {
  .hero h1 {
    font-size: 56px;
    letter-spacing: -1.8px;
  }
}
@media (min-width: 1024px) {
  .hero h1 {
    font-size: 72px;
    letter-spacing: -2.2px;
  }
}
.hero .lede {
  font-size: 18px;
  line-height: 1.45;
  margin: 0;
  max-width: 60ch;
  color: var(--color-text-soft);
}
@media (min-width: 768px) {
  .hero .lede {
    font-size: 20px;
  }
}

/* --- Skill grid --------------------------------------------------------- */
.skills {
  padding: 40px 0 80px;
}
@media (min-width: 768px) {
  .skills {
    padding: 64px 0 96px;
  }
}
.skills-heading {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 0 0 24px;
}
.skill-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: skill;
}
@media (min-width: 640px) {
  .skill-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}
@media (min-width: 1024px) {
  .skill-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-increment: skill;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.skill-card:hover {
  border-color: var(--color-text);
}

.skill-card .meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--color-muted);
}
.skill-card .meta .num::before {
  content: counter(skill, decimal-leading-zero);
}
.skill-card .meta .frame {
  text-align: right;
}

.skill-card h2 {
  font-size: 24px;
  line-height: 1.05;
  letter-spacing: -0.48px;
  font-weight: 500;
  margin: 0;
}
@media (min-width: 768px) {
  .skill-card h2 {
    font-size: 26px;
    letter-spacing: -0.6px;
  }
}

.skill-card p {
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
  color: var(--color-text-soft);
  flex: 1;
}

.skill-card .skill-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  background: var(--color-text);
  color: var(--color-surface);
  padding: 10px 14px;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-button);
  font-size: 14px;
  font-weight: 500;
  align-self: flex-start;
  transition: background 0.15s ease, color 0.15s ease;
  margin-top: 4px;
}
.skill-card .skill-link::after {
  content: "→";
  font-size: 14px;
  line-height: 1.0;
  display: inline-block;
  transition: transform 0.15s ease;
}
.skill-card .skill-link:hover,
.skill-card .skill-link:focus-visible {
  background: var(--color-canvas);
  color: var(--color-text);
}
.skill-card .skill-link:hover::after,
.skill-card .skill-link:focus-visible::after {
  transform: translateX(2px);
}
.skill-card .skill-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Download all (index) ---------------------------------------------- */
.download-all {
  margin-top: 40px;
  padding: 32px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}
@media (min-width: 768px) {
  .download-all {
    margin-top: 56px;
    padding: 40px 32px;
  }
}
.download-all .kicker {
  margin: 0;
}
.download-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  background: var(--color-text);
  color: var(--color-surface);
  padding: 14px 22px;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.0;
  transition: background 0.15s ease, color 0.15s ease;
}
.download-link::after {
  content: "↓";
  font-size: 16px;
  display: inline-block;
  transition: transform 0.15s ease;
}
.download-link:hover,
.download-link:focus-visible {
  background: var(--color-canvas);
  color: var(--color-text);
}
.download-link:hover::after,
.download-link:focus-visible::after {
  transform: translateY(2px);
}
.download-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.download-help {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}
.download-help a {
  color: var(--color-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
.download-help a:hover,
.download-help a:focus-visible {
  color: var(--color-text);
  text-decoration-color: var(--color-text);
}

/* --- About page --------------------------------------------------------- */
.about {
  padding: 48px 0 80px;
}
@media (min-width: 768px) {
  .about {
    padding: 80px 0 112px;
  }
}
.about .container {
  max-width: 760px;
}
.about h1 {
  font-size: 40px;
  line-height: 1.0;
  letter-spacing: -1.2px;
  font-weight: 500;
  margin: 0 0 32px;
}
@media (min-width: 768px) {
  .about h1 {
    font-size: 56px;
    letter-spacing: -1.8px;
  }
}
.about h2 {
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.4px;
  font-weight: 500;
  margin: 56px 0 16px;
}
@media (min-width: 768px) {
  .about h2 {
    font-size: 26px;
    letter-spacing: -0.6px;
    margin-top: 72px;
  }
}
.about h2:first-of-type {
  margin-top: 40px;
}
.about h3 {
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -0.2px;
  font-weight: 500;
  margin: 36px 0 12px;
  color: var(--color-text);
  scroll-margin-top: 24px;
}
@media (min-width: 768px) {
  .about h3 {
    font-size: 20px;
    letter-spacing: -0.3px;
  }
}
.about p {
  font-size: 17px;
  line-height: 1.6;
  margin: 0 0 16px;
  color: var(--color-text-soft);
}
.install-steps {
  margin: 0 0 20px;
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.install-steps li {
  font-size: 17px;
  line-height: 1.55;
  color: var(--color-text-soft);
  padding-left: 4px;
}
.install-steps li::marker {
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.install-steps li strong {
  color: var(--color-text);
  font-weight: 500;
}
@media (min-width: 768px) {
  .install-steps li {
    font-size: 18px;
  }
}
@media (min-width: 768px) {
  .about p {
    font-size: 18px;
  }
}
.about p strong {
  color: var(--color-text);
  font-weight: 500;
}
.about a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease;
}
.about a:hover,
.about a:focus-visible {
  text-decoration-color: var(--color-accent);
}
.about code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 1px 5px;
}
.about-back {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.about-back a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
}
.about-back a::before {
  content: "←";
}
.about-back a:hover,
.about-back a:focus-visible {
  border-color: var(--color-text);
}

/* --- Footer ------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  font-size: 14px;
  color: var(--color-muted);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: baseline;
}
.site-footer p {
  margin: 0;
}
.site-footer a {
  color: var(--color-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 3px;
}
.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-text);
  text-decoration-color: var(--color-text);
}

/* --- Focus visible (global) -------------------------------------------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Reduced motion ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}