/* ==========================================================================
   Bidisha — portfolio styles
   Colors, fonts and the main section heights live at the top. Edit freely.
   ========================================================================== */

:root {
  --bg: #04050d;
  --fg: #e9edf7;
  --muted: #8f9ab5;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ff8a5c;
  --cool: #8db8ff;

  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  /* How long the scroll journey is. Longer = slower, more cinematic. */
  --flight-height: 1400vh;
  --landing-height: 300vh;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: auto; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul { list-style: none; }

#space {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

main { position: relative; z-index: 1; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cool);
}

/* ---------- Rocket (cursor) ---------- */

.rocket {
  position: fixed;
  left: 0;
  top: 0;
  width: 30px;
  height: 67.5px;
  z-index: 60;
  pointer-events: none;
  opacity: 0;
  transform-origin: 15px 30px;
  will-change: transform;
}
.rocket svg { display: block; overflow: visible; }
.rocket .flame { transform-box: fill-box; transform-origin: 50% 0; }
.rocket .flicker {
  transform-box: fill-box;
  transform-origin: 50% 0;
  animation: flicker 0.12s infinite alternate;
}
@keyframes flicker {
  from { transform: scaleX(0.82) scaleY(0.94); }
  to   { transform: scaleX(1.1)  scaleY(1.06); }
}

body.rocket-cursor,
body.rocket-cursor * { cursor: none !important; }
body.rocket-cursor a,
body.rocket-cursor button { cursor: pointer !important; }

/* ---------- Top navigation ---------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 40;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 4vw;
  pointer-events: none;
}
.nav > * { pointer-events: auto; }
.nav .brand {
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: 0.01em;
}
.nav nav { display: flex; gap: 22px; }
.nav nav button {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.nav nav button:hover { color: var(--fg); }
.nav nav button.on { color: var(--fg); border-color: var(--accent); }

/* ---------- Pinned stages ---------- */

.flight { position: relative; height: var(--flight-height); }
.landing { position: relative; height: var(--landing-height); }

.stage {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
}

/* ---------- 1. Hero ---------- */

.hero-copy {
  position: absolute;
  right: 7vw;
  top: 50%;
  transform: translateY(-50%);
  width: min(520px, 42vw);
  will-change: transform, opacity;
}
.hero-copy h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3.4rem, 7.5vw, 6.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 10px 0 14px;
}
.hero-copy .role {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 22px;
}
.hero-copy .about {
  color: #c4ccdf;
  font-size: 1.02rem;
  max-width: 46ch;
}
.scroll-hint {
  margin-top: 38px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  animation: hint 2.4s ease-in-out infinite;
}
@keyframes hint {
  0%, 100% { opacity: 0.45; transform: translateY(0); }
  50%      { opacity: 1;    transform: translateY(5px); }
}

/* ---------- 2. Atmosphere / journey ---------- */

.atmos {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}
.track {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 500vh;
  will-change: transform;
}
.layer {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  /* Keep the milestone card at the optical middle of the viewport, clear of
     the fixed nav (top) and the altimeter (bottom-right). */
  padding: 64px 0 72px;
  border-top: 1px dashed rgba(255, 255, 255, 0.16);
}
.layer-label {
  position: absolute;
  top: 18px;
  left: 4vw;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.layer-name { color: var(--fg); }
.layer-alt  { color: var(--muted); letter-spacing: 0.1em; }

.entry {
  width: min(420px, 86vw);
  padding: 24px 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(7, 11, 28, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.entry.left  { margin-left: 8vw; }
.entry.right { margin-left: auto; margin-right: 8vw; }
.entry-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.entry h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.55rem;
  line-height: 1.2;
  margin: 8px 0 2px;
}
.entry-where { color: var(--cool); font-size: 0.92rem; margin-bottom: 8px; }
.entry p:last-child { color: #c4ccdf; font-size: 0.95rem; }

.altimeter {
  position: absolute;
  right: 4vw;
  bottom: 5vh;
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--mono);
  text-transform: uppercase;
}
.alt-label { font-size: 0.64rem; letter-spacing: 0.22em; color: var(--muted); }
.alt-value { font-size: 1.15rem; letter-spacing: 0.04em; }
.alt-layer { font-size: 0.66rem; letter-spacing: 0.18em; color: var(--cool); }

/* ---------- 3. Projects (constellations) ---------- */

.projects { position: absolute; inset: 0; pointer-events: none; }
.project {
  position: absolute;
  left: 6vw;
  bottom: 8vh;
  width: min(440px, 88vw);
  padding: 22px 26px;
  border-left: 1px solid var(--accent);
  background: linear-gradient(90deg, rgba(4, 6, 16, 0.65), rgba(4, 6, 16, 0));
  opacity: 0;
  will-change: opacity, transform;
}
.project-index {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}
.project h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  line-height: 1.15;
  margin: 6px 0 8px;
}
.project p { color: #c4ccdf; font-size: 0.97rem; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.tags li {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--cool);
}
.links { display: flex; gap: 20px; font-size: 0.9rem; }
.links a { border-bottom: 1px solid var(--accent); padding-bottom: 1px; }
.links a:hover { color: var(--accent); }

/* ---------- 4. Skills (star map legend) ---------- */

.skills { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
.skills-head { position: absolute; left: 6vw; top: 15vh; max-width: 30ch; }
.skills-sub { margin-top: 8px; color: #c4ccdf; font-size: 0.95rem; }

.skill-legend {
  position: absolute;
  left: 5vw; right: 5vw; bottom: 6vh;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.skill-group { --c: #8db8ff; border-top: 2px solid var(--c); padding-top: 10px; }
.skill-group h4 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c);
  margin-bottom: 6px;
}
.skill-group li { font-size: 0.86rem; color: #c4ccdf; line-height: 1.6; }

/* ---------- Contact (written on the planet) ---------- */

.contact-card {
  position: absolute;
  left: 50%;
  top: calc(34vh + 46px);
  transform: translateX(-50%);
  width: min(560px, 88vw);
  text-align: center;
  opacity: 0;
  will-change: opacity, transform;
}
.contact-card .eyebrow { color: #c9d8ff; }
.contact-card h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  margin: 6px 0 10px;
}
.contact-line { color: #d3daee; font-size: 0.96rem; max-width: 46ch; margin: 0 auto 18px; }
.contact-list { text-align: left; border-top: 1px solid rgba(255, 255, 255, 0.18); }
.contact-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.95rem;
}
.contact-list span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #b7c4e8;
  align-self: center;
}
.contact-list b { font-weight: 400; }
.contact-list a { border-bottom: 1px solid rgba(255, 138, 92, 0.7); }
.contact-list a:hover { color: var(--accent); }
.footer-note {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: #9aa7cc;
}

/* ---------- Small screens ---------- */

@media (max-width: 820px) {
  .nav nav { display: none; }

  .hero-copy {
    left: 6vw; right: 6vw;
    top: auto; bottom: 7vh;
    width: auto;
    transform: none;
  }
  .hero-copy h1 { font-size: clamp(2.8rem, 14vw, 4rem); }
  .hero-copy .about { font-size: 0.95rem; }
  .scroll-hint { margin-top: 18px; }

  .entry.left, .entry.right { margin-left: 5vw; margin-right: 5vw; width: auto; }
  .layer-label { left: 5vw; }

  .project { left: 4vw; right: 4vw; width: auto; bottom: 5vh; padding: 16px 18px; }
  .project p { font-size: 0.9rem; }

  .skills-head { top: 11vh; }
  .skill-legend { grid-template-columns: repeat(2, 1fr); gap: 12px 14px; bottom: 3vh; }
  .skill-group li { font-size: 0.78rem; line-height: 1.45; }

  .contact-card { top: calc(34vh + 36px); }
  .contact-list li { padding: 7px 0; font-size: 0.88rem; }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-hint, .rocket .flicker { animation: none; }
}