/*
  Design system for chnkukoolwal.vc (sandbox).
  Editorial, restrained, warm — shares palette DNA with Avvyun
  (parchment / oxblood / bronze) without copying it page-for-page.
*/

/* ---------- Tokens ---------- */
:root {
  --color-bg: #efebe2;
  --color-bg-raised: #f6f2ea;
  --color-ink: #2b1710;
  --color-ink-soft: #5c4536;
  --color-ink-faint: #8a7666;
  --color-accent: #a9744c;
  --color-accent-soft: #c7a17e;
  --color-border: rgba(43, 23, 16, 0.13);
  --color-border-strong: rgba(43, 23, 16, 0.28);
  --color-focus: #a9744c;

  --font-serif: "Fraunces", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.95rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --step-1: clamp(1.25rem, 1.16rem + 0.4vw, 1.5rem);
  --step-2: clamp(1.6rem, 1.4rem + 0.85vw, 2.15rem);
  --step-3: clamp(2.1rem, 1.7rem + 1.7vw, 3.2rem);
  --step-4: clamp(2.7rem, 2.05rem + 2.8vw, 4.6rem);
  --step-5: clamp(3.4rem, 2.4rem + 4.2vw, 6.2rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  --max-width: 75rem;
  --content-width: 40rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --duration-base: 500ms;
  --duration-slow: 800ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: light only;
}

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

* {
  margin: 0;
}

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

body {
  min-height: 100svh;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gutter);
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  text-decoration: none;
  font-size: var(--step--1);
}

.skip-link:focus {
  top: var(--space-2);
}

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  max-width: var(--content-width);
}

section {
  padding-block: var(--space-6);
}

section + section {
  border-top: 1px solid var(--color-border);
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.lede {
  font-size: var(--step-1);
  color: var(--color-ink-soft);
  line-height: 1.55;
}

p {
  max-width: 38em;
}

p + p {
  margin-top: 1em;
}

.text-muted {
  color: var(--color-ink-faint);
}

/* ---------- Links ---------- */
.link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35em;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 0.05em;
  transition: border-color var(--duration-base) var(--ease), color var(--duration-base) var(--ease);
}

.link:hover,
.link:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.link-arrow::after {
  content: "→";
  transition: transform var(--duration-base) var(--ease);
}

.link-arrow:hover::after,
.link-arrow:focus-visible::after {
  transform: translateX(0.2em);
}

.prose-body a {
  border-bottom: 1px solid var(--color-border-strong);
  text-decoration: none;
}

.prose-body a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-base) var(--ease);
}

.site-header[data-scrolled="true"] {
  border-bottom-color: var(--color-border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
}

.wordmark {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  font-weight: 500;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links {
  display: flex;
  gap: var(--space-3);
  font-size: var(--step--1);
}

.nav-links a {
  text-decoration: none;
  padding-block: 0.25rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-base) var(--ease), color var(--duration-base) var(--ease);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.nav-avvyun {
  font-size: var(--step--1);
  font-weight: 600;
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  transition: border-color var(--duration-base) var(--ease), color var(--duration-base) var(--ease), background var(--duration-base) var(--ease);
}

.nav-avvyun:hover,
.nav-avvyun:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

@media (max-width: 46rem) {
  .nav-primary {
    position: fixed;
    inset: 0;
    top: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--gutter);
    transform: translateY(-100%);
    transition: transform var(--duration-slow) var(--ease);
    z-index: 30;
  }

  .nav-primary[data-open="true"] {
    transform: translateY(0);
  }

  .nav-links {
    flex-direction: column;
    gap: var(--space-2);
    font-size: var(--step-2);
    font-family: var(--font-serif);
  }

  .nav-toggle {
    display: block;
    z-index: 50;
    position: relative;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-7) var(--space-6);
}

.hero-name {
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-3);
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: var(--step-5);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.hero-tagline em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-role {
  margin-top: var(--space-3);
  font-size: var(--step-1);
  color: var(--color-ink-soft);
  max-width: 34ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
}

/* ---------- Focus grid (current focus / building) ---------- */
.focus-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.focus-item {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-3);
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-3);
  align-items: baseline;
}

.focus-item[data-stage="primary"] .focus-name {
  font-size: var(--step-3);
}

.focus-item[data-stage="emerging"] .focus-name {
  font-size: var(--step-2);
  color: var(--color-ink-soft);
}

.focus-label {
  font-size: var(--step--1);
  color: var(--color-ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.focus-name {
  font-family: var(--font-serif);
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.focus-name a {
  text-decoration: none;
}

.focus-name a:hover,
.focus-name a:focus-visible {
  color: var(--color-accent);
}

.focus-summary {
  color: var(--color-ink-soft);
  max-width: 46ch;
}

@media (max-width: 40rem) {
  .focus-item {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
}

/* ---------- Portrait / media ---------- */
.portrait-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-ink);
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- Two-column editorial layout ---------- */
.split {
  display: grid;
  gap: var(--space-5);
  align-items: start;
  scroll-margin-top: 5.5rem;
}

@media (min-width: 56rem) {
  .split {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .split[data-reverse="true"] {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .split[data-reverse="true"] > :first-child {
    order: 2;
  }
}

/* ---------- Now list ---------- */
.now-list {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-3);
}

.now-item {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-top: 1px solid var(--color-border);
}

.now-label {
  font-size: var(--step--1);
  color: var(--color-ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 0.2em;
}

.now-title {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  margin-bottom: 0.2em;
}

@media (max-width: 40rem) {
  .now-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ---------- Writing index ---------- */
.article-list {
  margin-top: var(--space-4);
  display: grid;
  gap: 0;
}

.article-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-border);
  text-decoration: none;
}

.article-row:last-child {
  border-bottom: 1px solid var(--color-border);
}

.article-date {
  font-size: var(--step--1);
  color: var(--color-ink-faint);
  padding-top: 0.25em;
}

.article-title {
  font-family: var(--font-serif);
  font-size: var(--step-1);
  transition: color var(--duration-base) var(--ease);
}

.article-row:hover .article-title,
.article-row:focus-visible .article-title {
  color: var(--color-accent);
}

.article-excerpt {
  color: var(--color-ink-soft);
  margin-top: 0.35em;
}

@media (max-width: 40rem) {
  .article-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ---------- Themes list (writing intro) ---------- */
.theme-list {
  margin-top: var(--space-3);
  display: grid;
  gap: 0.6rem;
}

.theme-list li {
  padding-left: 1.4em;
  position: relative;
  color: var(--color-ink-soft);
}

.theme-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ---------- Timeline (about) ---------- */
.timeline {
  margin-top: var(--space-3);
  display: grid;
  gap: var(--space-2);
}

.timeline-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-3);
  padding-block: 0.6rem;
  border-top: 1px solid var(--color-border);
  font-size: var(--step--1);
}

.timeline-row .org {
  color: var(--color-ink);
  font-weight: 500;
}

.timeline-row .role {
  color: var(--color-ink-faint);
}

@media (max-width: 40rem) {
  .timeline-row {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

/* ---------- Contact ---------- */
.contact-list {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-2);
  max-width: 28rem;
}

.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-block: var(--space-2);
  border-top: 1px solid var(--color-border);
  text-decoration: none;
}

.contact-row:last-child {
  border-bottom: 1px solid var(--color-border);
}

.contact-row .label {
  font-family: var(--font-serif);
  font-size: var(--step-1);
}

.contact-row .value {
  font-size: var(--step--1);
  color: var(--color-ink-faint);
  transition: color var(--duration-base) var(--ease);
}

.contact-row:hover .value,
.contact-row:focus-visible .value {
  color: var(--color-accent);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4);
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  justify-content: space-between;
  align-items: center;
  font-size: var(--step--1);
  color: var(--color-ink-faint);
}

.footer-links {
  display: flex;
  gap: var(--space-3);
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-accent);
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--duration-slow) var(--ease), transform var(--duration-slow) var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

/* ---------- 404 ---------- */
.not-found {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--gutter);
}

.not-found h1 {
  font-size: var(--step-2);
  margin-bottom: var(--space-2);
}

.not-found p {
  color: var(--color-ink-soft);
  margin-inline: auto;
}