/* ═══════════════════════════════════════════════════════════
   Rohan Gosavi — portfolio timeline
   ═══════════════════════════════════════════════════════════ */

/* ── self-hosted webfonts (latin subset, no external requests) ── */
@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('fonts/Fraunces-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fraunces';
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url('fonts/Fraunces-italic.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
  src: url('fonts/Inter-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('fonts/JetBrainsMono-normal.woff2') format('woff2');
}

/* ── tokens ──────────────────────────────────────────────── */
:root {
  --bg:        #0a0a0c;
  --bg-soft:   #101014;
  --surface:   rgba(255, 255, 255, 0.028);
  --line:      rgba(255, 255, 255, 0.09);
  --line-soft: rgba(255, 255, 255, 0.05);
  --ink:       #f2f0ed;
  --ink-mid:   #a5a3a0;
  --ink-dim:   #6b6966;
  --accent:    #9e93f5;
  --accent-2:  #c3a6ef;
  --glow:      rgba(158, 147, 245, 0.15);

  --serif: "Fraunces", "Iowan Old Style", "Hoefler Text", Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --pad: clamp(1.25rem, 5vw, 5rem);
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --bg:        #f6f5f8;
  --bg-soft:   #eeedf2;
  --surface:   rgba(18, 17, 26, 0.025);
  --line:      rgba(18, 17, 26, 0.11);
  --line-soft: rgba(18, 17, 26, 0.06);
  --ink:       #14131a;
  --ink-mid:   #56545f;
  --ink-dim:   #87848f;
  --accent:    #4437a8;
  --accent-2:  #6a4a9c;
  --glow:      rgba(68, 55, 168, 0.11);
}

/* ── reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}

img { max-width: 100%; display: block; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

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

/* Fraunces is variable — let the browser pick the optical size per heading */
.hero__title, .section-title, .contact__title, .card__title,
.entry__ghost, .hero__year, .stat__num, .nav__mark {
  font-optical-sizing: auto;
}

/* icons */
.ico {
  width: 1em; height: 1em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* ── ambient background ──────────────────────────────────── */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(46vw 46vw at 78% 6%,  var(--glow), transparent 62%),
    radial-gradient(52vw 52vw at 10% 52%, var(--glow), transparent 65%),
    radial-gradient(40vw 40vw at 62% 96%, var(--glow), transparent 60%);
  opacity: 0.9;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── scroll progress ─────────────────────────────────────── */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 100;
  background: var(--line-soft);
}
.scroll-progress span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.1s linear;
}

/* ── nav ─────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem var(--pad);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease), padding 0.4s var(--ease);
}
.nav.is-stuck {
  border-bottom-color: var(--line-soft);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  padding-block: 0.85rem;
}

.nav__mark {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}
.nav__mark .dot { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 1.75rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-mid);
}
.nav__links a { position: relative; padding-block: 2px; transition: color 0.3s; }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }

.theme-btn {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  font-size: 15px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink-mid);
  transition: color 0.3s, border-color 0.3s, transform 0.3s var(--ease);
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); transform: rotate(25deg); }
.theme-btn .ico { grid-area: 1 / 1; transition: opacity 0.3s, transform 0.4s var(--ease); }
[data-theme="dark"]  .ico--sun  { opacity: 0; transform: scale(0.4) rotate(-90deg); }
[data-theme="light"] .ico--moon { opacity: 0; transform: scale(0.4) rotate(90deg); }

/* ── hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 8rem var(--pad) 6rem;
  overflow: hidden;
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 1.4rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px; height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 0.75rem;
}

.hero__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3.4rem, 13vw, 10rem);
  line-height: 0.92;
  letter-spacing: -0.035em;
  margin-bottom: 1.8rem;
}
.hero__title .line { display: block; }
.hero__title em {
  font-style: italic;
  color: var(--accent);
  padding-left: 0.12em;
}

.hero__lede {
  max-width: 46ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--ink-mid);
  margin-bottom: 2rem;
}

.hero__meta { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 3.5rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mid);
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 100px;
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  transition: color 0.3s;
}
.scroll-cue:hover { color: var(--accent); }
.scroll-cue__line {
  position: relative;
  display: block;
  width: 70px; height: 1px;
  background: var(--line);
  overflow: hidden;
}
.scroll-cue__line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  animation: sweep 2.4s var(--ease) infinite;
}
@keyframes sweep {
  0%   { transform: translateX(-100%); }
  55%  { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

/* giant ghost year in hero */
.hero__year {
  position: absolute;
  right: -0.04em;
  bottom: -0.14em;
  z-index: 1;
  font-family: var(--serif);
  font-size: clamp(7rem, 21vw, 19rem);
  line-height: 0.78;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
  user-select: none;
}

/* ── timeline layout ─────────────────────────────────────── */
.timeline {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 4rem var(--pad) 6rem;
}

/* sticky year rail */
.rail {
  position: fixed;
  left: clamp(1.5rem, calc((100vw - var(--maxw)) / 2 - 4rem), 3.5rem);
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease);
}
.rail.is-visible { opacity: 1; pointer-events: auto; }
.rail__list { display: flex; flex-direction: column; gap: 0.45rem; }
.rail__item {
  position: relative;
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  padding: 0.18rem 0 0.18rem 1.15rem;
  opacity: 0.5;
  transition: opacity 0.35s, color 0.35s, transform 0.45s var(--ease);
}
.rail__item::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 6px; height: 1px;
  background: currentColor;
  transform: translateY(-50%);
  transition: width 0.4s var(--ease);
}
.rail__item:hover { opacity: 1; color: var(--ink); }
.rail__item.is-active {
  opacity: 1;
  color: var(--accent);
  transform: translateX(4px);
}
.rail__item.is-active::before { width: 16px; }

/* the vertical track */
.track {
  position: relative;
  padding-left: clamp(2rem, 6vw, 4.5rem);
}
.track__line {
  position: absolute;
  left: clamp(0.4rem, 1.4vw, 1rem);
  top: 0; bottom: 0;
  width: 1px;
  background: var(--line-soft);
}
.track__line span {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 14px var(--glow);
}

/* ── entry ───────────────────────────────────────────────── */
.entry {
  --py: clamp(3rem, 6vw, 5.5rem);
  position: relative;
  padding-block: var(--py);
}
.entry:first-child { --py: 1.25rem; padding-bottom: clamp(3rem, 6vw, 5.5rem); }
.entry:last-child  { padding-bottom: 2rem; }

.entry__node {
  position: absolute;
  left: calc(clamp(0.4rem, 1.4vw, 1rem) - clamp(2rem, 6vw, 4.5rem) - 4px);
  top: calc(var(--py) + 0.85rem);
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease),
              box-shadow 0.5s var(--ease), transform 0.5s var(--ease);
}
.entry.is-active .entry__node {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.35);
  box-shadow: 0 0 0 5px var(--glow);
}

.entry__head { margin-bottom: 1.3rem; }
.entry__year {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--accent);
  padding: 0.3rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  border-radius: 100px;
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}
/* big outlined year, parked in the empty right column */
.entry__ghost {
  position: absolute;
  right: 0;
  top: 50%;
  z-index: 0;
  font-family: var(--serif);
  font-size: clamp(4rem, 8.5vw, 8.5rem);
  line-height: 1;
  letter-spacing: -0.045em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-50%) translateX(1.5rem);
  transition: opacity 1s var(--ease), transform 1s var(--ease),
              -webkit-text-stroke-color 0.6s var(--ease);
}
.entry.is-active .entry__ghost {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
  -webkit-text-stroke-color: color-mix(in srgb, var(--accent) 34%, transparent);
}

/* ── card ────────────────────────────────────────────────── */
.card {
  position: relative;
  max-width: 58ch;
  padding: clamp(1.4rem, 3vw, 2.25rem);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.5s var(--ease), transform 0.5s var(--ease),
              box-shadow 0.5s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 45%, transparent), transparent 45%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 50px -22px rgba(0, 0, 0, 0.55);
}
.card:hover::before { opacity: 1; }

.card__top {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
}
.card__icon {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  font-size: 16px;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.card__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.card__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
  text-wrap: balance;
}

.card p {
  color: var(--ink-mid);
  font-size: 0.965rem;
  max-width: 54ch;
}

.bullets {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.55rem;
}
.bullets li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.9rem;
  color: var(--ink-mid);
  line-height: 1.55;
}
.bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 7px; height: 1px;
  background: var(--accent);
  opacity: 0.75;
}

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.5rem; }
.chip {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
  padding: 0.32rem 0.68rem;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  transition: color 0.3s, border-color 0.3s;
}
.card:hover .chip { border-color: var(--line); }
.chip--accent {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 32%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

/* highlight states */
.entry--major .card { background: color-mix(in srgb, var(--accent) 4%, var(--surface)); }
.card--live { border-color: color-mix(in srgb, var(--accent) 24%, transparent); }

.pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.2s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent); }
  70%  { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ── now section ─────────────────────────────────────────── */
.now {
  border-top: 1px solid var(--line-soft);
  padding: clamp(5rem, 12vw, 9rem) var(--pad);
}
.now__inner { max-width: var(--maxw); margin-inline: auto; }

.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
}
.section-title em { font-style: italic; color: var(--accent); }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 2.75rem;
}
.stat {
  background: var(--bg);
  padding: 1.75rem 1.5rem;
  transition: background 0.4s var(--ease);
}
.stat:hover { background: var(--bg-soft); }
.stat__num {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 7vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--accent);
}
.stat__label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.now__text {
  max-width: 58ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  color: var(--ink-mid);
}

/* ── contact ─────────────────────────────────────────────── */
.contact {
  border-top: 1px solid var(--line-soft);
  padding: clamp(5rem, 12vw, 9rem) var(--pad) 3rem;
}
.contact__inner { max-width: var(--maxw); margin-inline: auto; }

.contact__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.4rem, 8vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.035em;
  margin-bottom: 2rem;
}

.mail {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  color: var(--ink);
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--line);
  transition: color 0.35s, border-color 0.35s, gap 0.35s var(--ease);
}
.mail:hover { color: var(--accent); border-color: var(--accent); gap: 1rem; }
.mail .ico { font-size: 0.85em; }

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2.5rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.socials a { transition: color 0.3s; }
.socials a:hover { color: var(--accent); }

.colophon {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
}

/* ── reveal animation ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ── responsive ──────────────────────────────────────────── */
@media (max-width: 1180px) {
  .rail { display: none; }
}

@media (max-width: 860px) {
  .entry__ghost { display: none; }
  .card { max-width: none; }
}

@media (max-width: 640px) {
  .nav__links { display: none; }
  .hero { padding-top: 6.5rem; }
  .hero__meta { margin-bottom: 2.5rem; }
  .track { padding-left: 2.1rem; }
  .track__line { left: 0.3rem; }
  .entry__node { left: -1.95rem; }
  .card { border-radius: 14px; }
  .socials { gap: 1.1rem; }
}

/* ── motion / print ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .nav, .rail, .scroll-progress, .grain, .hero__year, .entry__ghost { display: none; }
  body { background: #fff; color: #000; }
  .reveal { opacity: 1; transform: none; }
}