/* =============================================================
   Mrinmay Date — styles.css
   Desktop-first. Breakpoint: @media (max-width: 899px)
   ============================================================= */

/* ---------- Tokens ---------- */

:root {
  /* colour */
  --ink: #090C0D;
  --ink-raised: #101516;
  --paper: #ECE7E0;
  --paper-soft: rgba(236, 231, 224, 0.88);
  --paper-dim: #8C9694;
  --copper: #C1723F;
  --copper-deep: #5A3520;
  --hairline: rgba(236, 231, 224, 0.10);
  --pad-glow: rgba(193, 114, 63, 0.12);

  /* type */
  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-body: 'Public Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  /* measure & rhythm */
  --maxw: 1180px;
  --gutter: clamp(1.5rem, 5vw, 4rem);
  --measure: 62ch;
  --section-gap: clamp(6rem, 14vh, 11rem);
  --masthead-h: 4rem;
  --indent: 16.6667%;

  /* motion */
  --ease: cubic-bezier(.2, .6, .2, 1);
}

/* ---------- Reset ---------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--masthead-h) + 1.5rem);
  -webkit-text-size-adjust: 100%;
}

body,
h1,
p,
figure,
ol,
li {
  margin: 0;
}

ol {
  padding: 0;
}

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

svg {
  display: block;
}

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

h1 {
  font-size: inherit;
  font-weight: inherit;
}

/* ---------- Base type ---------- */

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ---------- Layout primitives ---------- */

.section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: var(--section-gap) 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.prose {
  max-width: var(--measure);
  margin-left: var(--indent);
}

.prose p,
.node__body p {
  font-size: clamp(1.0625rem, 1.15vw, 1.1875rem);
  font-weight: 300;
  line-height: 1.75;
  color: var(--paper-soft);
}

.prose p + p {
  margin-top: 1.5em;
}

/* ---------- Skip link ---------- */

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-250%);
  padding: 0.75rem 1.25rem;
  background: var(--ink-raised);
  color: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: transform 0.25s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- Masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s ease;
}

.masthead.is-scrolled {
  border-bottom-color: var(--hairline);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--masthead-h);
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.masthead__mark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  color: var(--paper);
  transition: color 0.3s ease;
}

.masthead__mark:hover {
  color: var(--copper);
}

.masthead__link {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-dim);
  transition: color 0.3s ease;
}

.masthead__link:hover {
  color: var(--copper);
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  align-items: center;
  min-height: min(92vh, 900px);
  padding-block: clamp(2rem, 6vh, 5rem);
}

.hero__inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero__name {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(3.25rem, 11vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.hero__lede {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  max-width: 28ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.35rem, 2.6vw, 2.05rem);
  line-height: 1.35;
  color: var(--paper-soft);
}

/* ---------- Portrait ---------- */

.portrait {
  position: relative;
  z-index: 0;
  margin-top: clamp(2rem, 6vw, 5rem);
}

.portrait::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  transform: translate(12px, 12px);
  border: 1px solid var(--copper-deep);
  border-radius: 2px;
  pointer-events: none;
}

.portrait__frame {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--ink-raised);
  border: 1px solid var(--hairline);
  border-radius: 2px;
}

.portrait__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Source is 2:3 in a 4:5 frame; bias the crop upward to keep the head clear. */
  object-position: 50% 22%;
}

.portrait__fallback {
  position: absolute;
  inset: 0;
  display: none;
  place-content: center;
  text-align: center;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--paper-dim);
}

.portrait__frame.is-empty .portrait__img {
  display: none;
}

.portrait__frame.is-empty .portrait__fallback {
  display: grid;
}

/* ---------- Link arrow ---------- */

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: clamp(2rem, 4vw, 3rem);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-dim);
  transition: color 0.3s ease;
}

.link-arrow:hover,
.link-arrow:focus-visible {
  color: var(--copper);
}

.link-arrow__icon {
  width: 0.875rem;
  height: 0.875rem;
  flex: none;
  animation: nudge 4s var(--ease) infinite;
  transition: transform 0.35s var(--ease);
}

.link-arrow:hover .link-arrow__icon,
.link-arrow:focus-visible .link-arrow__icon {
  animation: none;
  transform: translateY(3px);
}

@keyframes nudge {
  0%, 72%, 100% { transform: translateY(0); }
  82% { transform: translateY(2px); }
}

/* ---------- Journey / copper trace ---------- */

.track {
  --track-pad: clamp(2rem, 5vw, 4.5rem);
  position: relative;
  list-style: none;
  padding-left: var(--track-pad);
}

.track::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--copper-deep);
}

.track__lit {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: var(--lit, 0%);
  background: var(--copper);
  transform-origin: top;
  transition: height 0.2s linear;
  will-change: height;
}

.node {
  --meta-pad: 0.55rem;
  --meta-lead: calc(0.8125rem * 1.4);
  --reveal-op: 0.55;
  position: relative;
  display: grid;
  grid-template-columns: 12.5rem minmax(0, 1fr);
  column-gap: clamp(2rem, 4vw, 3.5rem);
}

.node + .node {
  margin-top: clamp(3.5rem, 8vw, 6rem);
}

.node::before {
  content: '';
  position: absolute;
  left: calc(var(--track-pad) * -1 + 0.5px);
  top: calc(var(--meta-pad) + var(--meta-lead) / 2);
  width: 7px;
  height: 7px;
  transform: translate(-50%, -50%);
  background: var(--ink);
  border: 1px solid var(--copper-deep);
  transition:
    background-color 0.45s var(--ease),
    border-color 0.45s var(--ease),
    box-shadow 0.45s var(--ease);
}

.node.is-active {
  --reveal-op: 1;
}

.node.is-active::before {
  background: var(--copper);
  border-color: var(--copper);
  box-shadow: 0 0 0 4px var(--pad-glow);
}

.node__meta {
  padding-top: var(--meta-pad);
}

.node__org {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.8125rem;
  line-height: 1.4;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.node__role {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--paper-dim);
}

.node__body {
  max-width: var(--measure);
}

/* ---------- Closing ---------- */

.closing__statement {
  max-width: 46ch;
  margin-left: var(--indent);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  line-height: 1.5;
  color: var(--paper);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  margin-left: var(--indent);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
}

.contact-link span {
  padding-bottom: 0.4rem;
  background-image: linear-gradient(var(--copper), var(--copper));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 1.75rem 1px;
  transition: background-size 0.45s var(--ease);
}

.contact-link:hover span,
.contact-link:focus-visible span {
  background-size: 100% 1px;
}

.contact-link__icon {
  width: 0.875rem;
  height: 0.875rem;
  flex: none;
  transition: transform 0.35s var(--ease);
}

.contact-link:hover .contact-link__icon,
.contact-link:focus-visible .contact-link__icon {
  transform: translate(2px, -2px);
}

/* ---------- Colophon ---------- */

.colophon {
  margin-top: var(--section-gap);
  border-top: 1px solid var(--hairline);
}

.colophon__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: 2rem;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

/* ---------- Reveal (JS-gated) ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.7s cubic-bezier(.2, .6, .2, 1),
    transform 0.7s cubic-bezier(.2, .6, .2, 1);
}

.js [data-reveal].is-revealed {
  opacity: var(--reveal-op, 1);
  transform: none;
}

/* ---------- Narrow viewports ---------- */

@media (max-width: 899px) {
  :root {
    --indent: 0%;
  }

  .hero {
    min-height: 0;
    padding-block: clamp(3rem, 10vh, 5rem) clamp(1rem, 4vh, 2rem);
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: clamp(2.5rem, 9vw, 4rem);
  }

  .hero__lede {
    max-width: 32ch;
  }

  .portrait {
    max-width: 280px;
    margin-top: 0;
  }

  .portrait::after {
    transform: translate(8px, 8px);
  }

  .node {
    --meta-pad: 0rem;
    display: block;
  }

  .node__body {
    margin-top: 1.125rem;
  }

  .colophon__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.625rem;
    padding-block: 1.75rem;
  }
}

/* ---------- Reduced motion ---------- */

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

  html {
    scroll-behavior: auto;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .node {
    --reveal-op: 1;
  }

  .track__lit {
    height: 100%;
  }

  .link-arrow__icon {
    animation: none;
  }
}

/* ---------- Print ---------- */

/* Reveals are opacity-gated, so an unscrolled page would print mostly blank. */
@media print {
  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .node {
    --reveal-op: 1;
  }

  .masthead,
  .skip-link,
  .link-arrow {
    display: none;
  }
}