/* =========================================================================
   Akshat Jain — personal site
   "The Ledger" : ink on paper, editorial, quietly precise.
   Newsreader (display + reading) · IBM Plex Mono (marks, meta, structure)
   ========================================================================= */

/* ----- Reset ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
img, picture, svg, iframe { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { padding: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ----- Tokens ----------------------------------------------------------- */
:root {
  --paper:     #F2F1EA;   /* soft warm-grey paper (cooler than cream) */
  --paper-2:   #ECEAE1;   /* recessed panels */
  --surface:   #FBFAF5;   /* raised cards */
  --ink:       #1A1813;   /* warm near-black */
  --ink-2:     #35322B;
  --graphite:  #6A665B;   /* secondary text / meta */
  --graphite-2:#8B877A;
  --line:      #DCD9CD;   /* hairlines */
  --line-2:    #C9C5B6;
  --accent:    #2C5545;   /* deep muted forest */
  --accent-2:  #1F3E32;
  --accent-tint:#E7ECE4;

  --font-serif: 'Newsreader', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --font-mono:  'IBM Plex Mono', ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, monospace;

  --container: 1220px;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --measure: 44rem;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ----- Base ------------------------------------------------------------- */
html { scrollbar-color: var(--line-2) var(--paper); }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1;
  overflow-x: hidden;
}

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

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

/* ----- Layout ----------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.measure { max-width: var(--measure); }

/* ----- Marks / eyebrows ------------------------------------------------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--graphite);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 1.6em; height: 1px;
  background: var(--accent);
  display: inline-block;
}
.eyebrow.no-rule::before { display: none; }

.folio { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent); letter-spacing: 0.04em; }

/* ----- Type scale ------------------------------------------------------- */
.display {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.02em;
  font-size: clamp(3rem, 9vw, 7rem);
}
.display em { font-style: italic; }
h1, h2, h3, h4 { font-weight: 500; line-height: 1.1; letter-spacing: -0.015em; }
.h-section { font-size: clamp(1.9rem, 3.4vw, 2.9rem); font-weight: 400; letter-spacing: -0.02em; }

/* ----- Links (prose) ---------------------------------------------------- */
.link-underline, .prose a {
  color: var(--ink);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 100% 1px;
  background-position: 0 92%;
  background-repeat: no-repeat;
  padding-bottom: 0.02em;
  transition: background-size 0.4s var(--ease), color 0.3s var(--ease);
}
.prose a { color: var(--accent-2); font-style: italic; }
.link-underline:hover, .prose a:hover { color: var(--accent); background-size: 100% 2px; }

/* =========================================================================
   Header
   ========================================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 4.6rem;
}
.brand {
  font-family: var(--font-mono);
  font-size: 0.82rem; letter-spacing: 0.16em; text-transform: uppercase;
  font-weight: 600; color: var(--ink);
  display: inline-flex; align-items: center; gap: 0.7em;
}
.brand__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); display: inline-block; }

.nav { display: flex; align-items: center; gap: clamp(1.2rem, 2.4vw, 2.4rem); }
.nav a {
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--graphite); font-weight: 500;
  position: relative; padding: 0.4rem 0;
  transition: color 0.3s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0.1rem;
  width: 100%; height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: right; transition: transform 0.4s var(--ease);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }

.nav-toggle { display: none; width: 2.4rem; height: 2.4rem; position: relative; z-index: 60; }
@media (max-width: 760px){
  .nav { display: none; }
  .nav-toggle { display: block; }
  .site-header__inner { height: 4rem; }
}
.nav-toggle span { position: absolute; left: 0.5rem; right: 0.5rem; height: 1.5px; background: var(--ink); transition: transform 0.35s var(--ease), opacity 0.2s; }
.nav-toggle span:nth-child(1){ top: 0.85rem; }
.nav-toggle span:nth-child(2){ bottom: 0.85rem; }
body.menu-open .nav-toggle span:nth-child(1){ transform: translateY(0.35rem) rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2){ transform: translateY(-0.35rem) rotate(-45deg); }

/* Mobile menu overlay */
.mobile-nav {
  position: fixed; inset: 0; z-index: 40;
  background: var(--paper);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--gutter);
  transform: translateY(-100%);
  transition: transform 0.6s var(--ease);
  visibility: hidden;
}
body.menu-open .mobile-nav { transform: translateY(0); visibility: visible; }
.mobile-nav ol { list-style: none; }
.mobile-nav li { overflow: hidden; }
.mobile-nav a {
  font-family: var(--font-serif); font-size: clamp(2.4rem, 11vw, 4rem);
  letter-spacing: -0.02em; display: flex; align-items: baseline; gap: 1rem;
  padding: 0.35rem 0; color: var(--ink);
  transform: translateY(110%); transition: transform 0.6s var(--ease);
}
body.menu-open .mobile-nav a { transform: translateY(0); }
.mobile-nav li:nth-child(1) a { transition-delay: 0.08s; }
.mobile-nav li:nth-child(2) a { transition-delay: 0.14s; }
.mobile-nav li:nth-child(3) a { transition-delay: 0.20s; }
.mobile-nav li:nth-child(4) a { transition-delay: 0.26s; }
.mobile-nav .idx { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); letter-spacing: 0.1em; }

/* =========================================================================
   Reveal animation primitives
   ========================================================================= */
.reveal { opacity: 0; transform: translateY(24px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.line-mask { overflow: hidden; display: block; }
.line-mask > * { display: block; transform: translateY(102%); }
.line-mask.is-in > * { transform: translateY(0); transition: transform 1s var(--ease); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .line-mask > * { opacity: 1 !important; transform: none !important; }
  * { scroll-behavior: auto !important; }
}

/* =========================================================================
   Hero (home)
   ========================================================================= */
.hero { padding-top: clamp(3rem, 9vw, 7rem); padding-bottom: clamp(2.5rem, 6vw, 4.5rem); }
.hero__grid {
  display: grid; grid-template-columns: 1fr; gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
}
@media (min-width: 900px){ .hero__grid { grid-template-columns: 1.35fr 0.65fr; } }
.hero__meta { display: flex; flex-wrap: wrap; gap: 0.6rem 2rem; margin-bottom: 1.8rem; }
.hero__display { color: var(--ink); font-size: clamp(2.4rem, 6.2vw, 4.6rem); }
.hero__display .sub {
  display: block; font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-style: italic; color: var(--graphite); line-height: 1.4;
  letter-spacing: -0.01em; margin-top: 1.4rem; max-width: 30ch;
}
.hero__portrait { position: relative; align-self: end; margin: 0; width: 100%; }
.hero__portrait .frame {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--line);
}
.hero__portrait img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 48% 22%;
  transition: transform 1.4s var(--ease);
}
.hero__portrait:hover img { transform: scale(1.03); }
.hero__portrait figcaption {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--graphite); margin-top: 0.9rem;
  display: flex; justify-content: space-between; gap: 1rem;
  border-top: 1px solid var(--line); padding-top: 0.7rem;
}
@media (max-width: 899px){
  .hero__portrait { max-width: 22rem; }
  .hero__portrait .frame { aspect-ratio: 1 / 1; }
}

/* thin rule with running label */
.rule {
  display: flex; align-items: center; gap: 1.4rem;
  border-top: 1px solid var(--line); padding-top: 1rem; margin-top: clamp(3rem,7vw,5rem);
}
.rule span { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--graphite); white-space: nowrap; }
.rule .grow { flex: 1; }

/* =========================================================================
   Sections
   ========================================================================= */
.section { padding-block: clamp(3.5rem, 9vw, 7rem); }
.section--tight { padding-block: clamp(2.5rem, 6vw, 4rem); }
.section__head {
  display: grid; gap: 1.2rem; margin-bottom: clamp(2.2rem, 5vw, 3.5rem);
}
@media (min-width: 800px){
  .section__head { grid-template-columns: auto 1fr; align-items: baseline; gap: 2.5rem; }
}
.section__head p { color: var(--graphite); max-width: 40ch; }

/* About prose + credentials ledger */
.about {
  display: grid; gap: clamp(2rem, 5vw, 4rem);
}
@media (min-width: 860px){ .about { grid-template-columns: 1.1fr 0.9fr; } }
.prose p { margin-bottom: 1.15rem; max-width: var(--measure); }
.prose p:last-child { margin-bottom: 0; }

.ledger { border-top: 1px solid var(--ink); }
.ledger__row {
  display: grid; grid-template-columns: auto 1fr auto; gap: 1rem 1.4rem;
  align-items: baseline;
  padding: 1.05rem 0; border-bottom: 1px solid var(--line);
}
.ledger__row .no { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); letter-spacing: 0.05em; }
.ledger__row .what { font-size: 1.05rem; letter-spacing: -0.01em; }
.ledger__row .who { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--graphite); text-align: right; }

/* =========================================================================
   Blog — cards
   ========================================================================= */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: clamp(2rem,4vw,3rem); }
.filters button {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--graphite); padding: 0.5rem 0.95rem; border: 1px solid var(--line);
  border-radius: 100px; transition: all 0.3s var(--ease);
}
.filters button:hover { color: var(--ink); border-color: var(--line-2); }
.filters button[aria-pressed="true"] { color: var(--paper); background: var(--accent); border-color: var(--accent); }

/* featured */
.feature {
  display: grid; gap: 0; border: 1px solid var(--line); background: var(--surface);
  overflow: hidden; margin-bottom: clamp(2rem, 4vw, 3.2rem);
}
@media (min-width: 780px){ .feature { grid-template-columns: 1.1fr 1fr; } }
.feature__media { overflow: hidden; background: var(--paper-2); min-height: 240px; }
.feature__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.feature:hover .feature__media img { transform: scale(1.04); }
.feature__body { padding: clamp(1.6rem, 3vw, 2.8rem); display: flex; flex-direction: column; gap: 1rem; }
.feature__body h3 { font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 400; letter-spacing: -0.02em; }
.feature__excerpt { color: var(--graphite); }

.cardgrid { display: grid; gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
@media (min-width: 640px){ .cardgrid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px){ .cardgrid { grid-template-columns: 1fr 1fr 1fr; } }

.card {
  background: var(--surface);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(1.5rem, 2.4vw, 2rem);
  display: flex; flex-direction: column; gap: 1rem;
  min-height: 17rem;
  position: relative;
  transition: background 0.4s var(--ease);
}
.card:hover { background: var(--paper); }
.card__top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.card__no { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); letter-spacing: 0.04em; }
.card__cat { font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--graphite); }
.card h3 {
  font-size: 1.45rem; font-weight: 400; letter-spacing: -0.015em; line-height: 1.14;
}
.card__excerpt { color: var(--graphite); font-size: 0.98rem; line-height: 1.55; }
.card__foot {
  margin-top: auto; display: flex; align-items: center; justify-content: space-between;
  padding-top: 1rem; border-top: 1px solid var(--line);
}
.card__date { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; color: var(--graphite); }
.card__arrow { font-family: var(--font-mono); font-size: 0.9rem; color: var(--ink); transition: transform 0.4s var(--ease); }
.card:hover .card__arrow { transform: translate(3px, -3px); color: var(--accent); }
.card a.stretch::after { content: ""; position: absolute; inset: 0; }

/* =========================================================================
   Article
   ========================================================================= */
.post-head { padding-top: clamp(2rem, 5vw, 3.5rem); }
.post-back {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--graphite); display: inline-flex; gap: 0.6em; align-items: center; margin-bottom: 2.2rem;
  transition: color 0.3s var(--ease), gap 0.3s var(--ease);
}
.post-back:hover { color: var(--ink); gap: 0.9em; }
.post-title { font-size: clamp(2.2rem, 5.2vw, 3.9rem); font-weight: 400; letter-spacing: -0.025em; line-height: 1.02; max-width: 18ch; }
.post-meta {
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.6rem; margin-top: 1.8rem;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--graphite);
}
.post-meta .accent { color: var(--accent); }
.post-hero { margin: clamp(2.2rem,5vw,3.5rem) 0 0; border: 1px solid var(--line); overflow: hidden; }
.post-hero img { width: 100%; height: auto; }

.prose {
  max-width: var(--measure);
  font-size: 1.175rem; line-height: 1.72;
  color: var(--ink-2);
}
.article { padding-block: clamp(2.5rem, 6vw, 4rem) clamp(3.5rem,9vw,6rem); }
.prose h2 { font-family: var(--font-serif); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 400; letter-spacing: -0.02em; line-height: 1.2; margin: 2.4rem 0 1rem; color: var(--ink); text-align: left !important; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 600; color: var(--accent); margin: 2.4rem 0 0.9rem; }
.prose ul, .prose ol { margin: 0 0 1.3rem; padding-left: 1.3rem; max-width: var(--measure); }
.prose li { margin-bottom: 0.55rem; padding-left: 0.3rem; }
.prose li::marker { color: var(--accent); font-family: var(--font-mono); font-size: 0.85em; }
.prose ul li::marker { content: "—  "; }
.prose blockquote {
  margin: 1.8rem 0; padding: 0.4rem 0 0.4rem 1.6rem;
  border-left: 2px solid var(--accent);
  font-style: italic; color: var(--graphite);
}
.prose blockquote p { max-width: none; }
.prose figure { margin: 2rem 0; }
.prose figure img { width: 100%; height: auto; border: 1px solid var(--line); background: var(--surface); }
.prose img { border-radius: 2px; }
.prose > img, .prose p img { margin: 0.4rem 0; }
.prose iframe { width: 100%; aspect-ratio: 16 / 9; height: auto; border: 1px solid var(--line); margin: 2rem 0; background: var(--ink); }
.prose .embed { position: relative; margin: 2rem 0; }
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }

/* inline image rows in a couple posts (SG screenshots) */
.prose p > img { display: inline-block; width: auto; max-height: 420px; border: 1px solid var(--line); margin: 0.4rem 0.4rem 0.4rem 0; vertical-align: top; }

/* post footer nav */
.post-more { border-top: 1px solid var(--ink); padding-top: 2rem; margin-top: 3rem; }
.post-more .eyebrow { margin-bottom: 1.5rem; }

/* =========================================================================
   Contact / Notes
   ========================================================================= */
.big-statement { font-size: clamp(2.4rem, 7vw, 5rem); font-weight: 400; letter-spacing: -0.025em; line-height: 1.0; max-width: 16ch; }
.contact-list { border-top: 1px solid var(--ink); margin-top: clamp(2.5rem,5vw,3.5rem); }
.contact-list a, .contact-list .row {
  display: grid; grid-template-columns: auto 1fr auto; gap: 1rem 1.6rem; align-items: baseline;
  padding: 1.3rem 0; border-bottom: 1px solid var(--line);
  transition: padding-left 0.4s var(--ease);
}
.contact-list a:hover { padding-left: 0.6rem; }
.contact-list .k { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.contact-list .v { font-size: clamp(1.2rem,2.4vw,1.7rem); letter-spacing: -0.01em; }
.contact-list .ar { font-family: var(--font-mono); color: var(--graphite); transition: transform 0.4s var(--ease); }
.contact-list a:hover .ar { transform: translateX(4px); color: var(--accent); }

/* notes ledger */
.notes-list { border-top: 1px solid var(--ink); margin-top: clamp(2rem,4vw,3rem); counter-reset: note; }
.notes-list a {
  display: grid; grid-template-columns: auto 1fr auto; gap: 1rem 1.6rem; align-items: baseline;
  padding: 1.2rem 0; border-bottom: 1px solid var(--line);
  transition: padding-left 0.4s var(--ease), background 0.3s var(--ease);
}
.notes-list a:hover { padding-left: 0.7rem; }
.notes-list .no { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); }
.notes-list .ttl { font-size: clamp(1.2rem, 2.4vw, 1.6rem); letter-spacing: -0.01em; }
.notes-list .ar { font-family: var(--font-mono); font-size: 0.8rem; color: var(--graphite); transition: transform 0.4s var(--ease); }
.notes-list a:hover .ar { transform: translate(3px,-3px); color: var(--accent); }

/* =========================================================================
   Footer
   ========================================================================= */
.site-footer { background: var(--ink); color: var(--paper); padding-block: clamp(3.5rem, 8vw, 6rem) 2.5rem; margin-top: clamp(3rem,8vw,6rem); }
.site-footer a { color: var(--paper); }
.footer-top { display: grid; gap: 2.5rem; }
@media (min-width: 760px){ .footer-top { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-brand .display { font-size: clamp(2.6rem, 6vw, 4.2rem); }
.footer-brand p { color: color-mix(in srgb, var(--paper) 62%, transparent); margin-top: 1rem; max-width: 26ch; }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: color-mix(in srgb, var(--paper) 55%, transparent); font-weight: 500; margin-bottom: 1.1rem; }
.footer-col ul { list-style: none; display: grid; gap: 0.7rem; }
.footer-col a { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em; color: color-mix(in srgb, var(--paper) 82%, transparent); transition: color 0.3s var(--ease); display: inline-flex; gap: 0.5em; }
.footer-col a:hover { color: var(--paper); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  margin-top: clamp(3rem,7vw,5rem); padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--paper) 16%, transparent);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--paper) 50%, transparent);
}

/* focus */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* utility */
.hide { display: none !important; }
.center { text-align: center; }