/* ============================================================
   Shan Siddique — Personal site
   Dark, tech-forward design system
   ============================================================ */

:root {
  /* Color */
  --bg:        #08090c;
  --bg-2:      #0d0f14;
  --panel:     #11141b;
  --panel-2:   #161a23;
  --line:      #232936;
  --line-2:    #2e3645;
  --text:      #e8ecf3;
  --text-2:    #9aa4b5;
  --text-3:    #66708292;
  --muted:     #6b7587;
  --accent:    #2dd4bf;   /* electric teal */
  --accent-2:  #38bdf8;   /* cyan */
  --accent-ink:#062c28;
  --glow:      rgba(45,212,191,.18);

  /* Type */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Layout */
  --maxw: 1120px;
  --pad: 24px;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.accent { color: var(--accent); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--solid {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 8px 30px var(--glow);
}
.btn--solid:hover { background: #38e6d2; }
.btn--ghost {
  border-color: var(--line-2);
  color: var(--text);
  background: rgba(255,255,255,.02);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--link { color: var(--text-2); padding: 12px 6px; }
.btn--link:hover { color: var(--accent); }

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8,9,12,.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.nav.is-scrolled { border-color: var(--line); background: rgba(8,9,12,.9); }
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: .5px;
}
.brand__name { font-family: var(--font-display); font-size: 16px; }
.brand__cred { color: var(--text-2); font-weight: 400; }
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links > a:not(.btn) {
  font-size: 15px;
  color: var(--text-2);
  font-weight: 500;
  transition: color .2s ease;
}
.nav__links > a:not(.btn):hover { color: var(--text); }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.nav__toggle span { width: 24px; height: 2px; background: var(--text); transition: .25s; }

/* ===== HERO ===== */
.hero { position: relative; padding: 110px 0 90px; overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: .35;
}
.hero::after {
  content: "";
  position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
  width: 70vw; height: 60vh;
  background: radial-gradient(circle, var(--glow), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}
.hero__inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr 320px;
  align-items: center;
  gap: 56px;
}
.hero__copy { max-width: 640px; }
.hero__photo { display: flex; justify-content: center; }
.hero__photo-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4 / 5;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line-2);
  background: var(--panel);
  box-shadow: 0 24px 60px rgba(0,0,0,.5), 0 0 0 1px rgba(45,212,191,.08);
}
.hero__photo-frame::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(8,9,12,.45));
  pointer-events: none;
}
.hero__photo-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center top; display: block; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-2);
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--glow);
  animation: pulse 2.2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.45} }
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -1.5px;
  font-weight: 600;
  margin-bottom: 26px;
}
.hero__lede {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--text-2);
  max-width: 640px;
  margin-bottom: 36px;
}
.hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 44px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero__tags span {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-2);
  border: 1px solid var(--line);
  padding: 7px 13px;
  border-radius: 8px;
  background: var(--bg-2);
}

/* ===== STATS ===== */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 38px 24px;
  border-left: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 6px;
}
.stat:first-child { border-left: none; }
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
}
.stat__num .plus { color: var(--accent); }
.stat__label { font-size: 14px; color: var(--text-2); }

/* ===== SECTIONS ===== */
.section { padding: 96px 0; }
.section--alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section__head { max-width: 640px; margin-bottom: 52px; }
.section__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 16px;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 600;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 14px;
}
.section__sub { color: var(--text-2); font-size: 17px; }

/* ===== CARDS (expertise) ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color .25s ease, transform .25s ease, background .25s ease;
}
.card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-2); background: var(--panel-2); }
.card:hover::before { transform: scaleX(1); }
.card h3 { font-family: var(--font-display); font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.card p { color: var(--text-2); font-size: 15px; }

/* ===== TIMELINE ===== */
.timeline { display: flex; flex-direction: column; }
.tl { display: grid; grid-template-columns: 28px 1fr; gap: 22px; }
.tl__rail { position: relative; display: flex; justify-content: center; }
.tl__rail::before {
  content: ""; position: absolute; top: 8px; bottom: -8px; width: 1px;
  background: var(--line-2);
}
.tl:last-child .tl__rail::before { display: none; }
.tl__node {
  position: relative; z-index: 1;
  width: 14px; height: 14px; border-radius: 50%; margin-top: 6px;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px var(--glow);
}
.tl__body { padding-bottom: 44px; }
.tl:last-child .tl__body { padding-bottom: 0; }
.tl__top {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 16px; flex-wrap: wrap; margin-bottom: 12px;
}
.tl__role { font-family: var(--font-display); font-size: 20px; font-weight: 600; }
.tl__org { color: var(--accent); font-size: 14.5px; font-weight: 500; margin-top: 2px; }
.tl__date {
  font-family: var(--font-mono); font-size: 13px; color: var(--text-2);
  white-space: nowrap; padding-top: 4px;
}
.tl__desc { color: var(--text-2); font-size: 15.5px; margin-bottom: 14px; max-width: 720px; }
.tl__points { list-style: none; display: flex; flex-direction: column; gap: 8px; max-width: 720px; }
.tl__points li {
  position: relative; padding-left: 20px; color: var(--text); font-size: 15px;
}
.tl__points li::before {
  content: "▸"; position: absolute; left: 0; color: var(--accent); font-size: 13px;
}
.tl__chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tl__chips span {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-2);
  background: var(--bg); border: 1px solid var(--line); padding: 5px 11px; border-radius: 7px;
}

/* ===== VENTURES ===== */
.ventures { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ventures--two { grid-template-columns: repeat(2, 1fr); }
.venture__link {
  display: inline-block; margin-top: 16px;
  font-family: var(--font-mono); font-size: 13px; color: var(--accent);
  border-bottom: 1px solid transparent; transition: border-color .2s ease;
}
.venture__link:hover { border-color: var(--accent); }
.venture {
  background: linear-gradient(160deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color .25s ease, transform .25s ease;
}
.venture:hover { transform: translateY(-4px); border-color: var(--accent); }
.venture__tag {
  font-family: var(--font-mono); font-size: 12px; color: var(--accent);
  text-transform: uppercase; letter-spacing: .5px; display: block; margin-bottom: 16px;
}
.venture h3 { font-family: var(--font-display); font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.venture p { color: var(--text-2); font-size: 15px; }

/* ===== EDUCATION ===== */
.edu { display: flex; flex-direction: column; }
.edu__row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  flex-wrap: wrap;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.edu__row:first-child { border-top: 1px solid var(--line); }
.edu__deg { font-family: var(--font-display); font-size: 18px; font-weight: 600; display: flex; align-items: center; gap: 12px; }
.edu__note {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 100px; padding: 3px 10px; font-weight: 400;
}
.edu__inst { color: var(--text-2); font-size: 15px; }

/* ===== CONTACT ===== */
.contact { text-align: left; }
.contact__inner { max-width: 760px; }
.contact__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 600; letter-spacing: -1.5px; line-height: 1.05;
  margin: 16px 0 18px;
}
.contact__sub { color: var(--text-2); font-size: 17px; margin-bottom: 36px; max-width: 600px; }

.cform { display: flex; flex-direction: column; gap: 16px; max-width: 620px; }
.cform__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cform__field { display: flex; flex-direction: column; gap: 8px; }
.cform__field > span {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-2);
  text-transform: uppercase; letter-spacing: .5px;
}
.cform__field > span em { color: var(--muted); font-style: normal; text-transform: none; }
.cform input, .cform textarea {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 13px 15px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  transition: border-color .2s ease, background .2s ease;
  resize: vertical;
}
.cform input::placeholder, .cform textarea::placeholder { color: var(--muted); }
.cform input:focus, .cform textarea:focus {
  outline: none; border-color: var(--accent); background: var(--panel-2);
}
.cform__actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 4px; }
.cform__alt { font-size: 14px; color: var(--text-2); border-bottom: 1px solid transparent; transition: color .2s ease, border-color .2s ease; }
.cform__alt:hover { color: var(--accent); border-color: var(--accent); }
.cform__note { font-size: 14px; margin-top: 4px; }
.cform__note.is-ok { color: var(--accent); }
.cform__note.is-err { color: #f0997b; }
.contact__loc { margin-top: 26px; font-family: var(--font-mono); font-size: 13px; color: var(--text-2); }

/* ===== GAME ===== */
.game__panel {
  max-width: 420px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.game__hud {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-2);
  text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 14px;
}
.game__hud b { color: var(--accent); font-weight: 500; margin-left: 6px; }
.game__hud-right { display: inline-flex; align-items: center; gap: 14px; }
.game__mute {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .5px;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  padding: 4px 9px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.game__mute:hover { border-color: var(--accent); }
.game__mute.is-muted { color: var(--muted); }
.game__stage { position: relative; width: 100%; aspect-ratio: 1 / 1; }
.game__stage::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: 10px;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,.22) 3px,
    rgba(0,0,0,.22) 4px
  );
  mix-blend-mode: multiply;
  opacity: .55;
}
.game__stage::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: 10px;
  pointer-events: none;
  z-index: 1;
  box-shadow: inset 0 0 60px rgba(0,0,0,.55);
  background: radial-gradient(ellipse 120% 120% at 50% 50%, transparent 60%, rgba(0,0,0,.35));
}
#snake {
  width: 100%; height: 100%; display: block;
  background: #0a0c11;
  border: 1px solid var(--line);
  border-radius: 10px;
  image-rendering: pixelated;
  touch-action: none;
}
.game__overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px;
  background: rgba(8,9,12,.82);
  backdrop-filter: blur(2px);
  border-radius: 10px;
  z-index: 2;
  transition: opacity .2s ease;
}
.game__overlay.is-hidden { opacity: 0; pointer-events: none; }
.game__msg { font-family: var(--font-display); font-size: 22px; font-weight: 600; }
.game__hint { font-family: var(--font-mono); font-size: 12px; color: var(--text-2); }
.game__dpad { display: none; flex-direction: column; align-items: center; gap: 8px; margin-top: 16px; }
.game__dpad-row { display: flex; gap: 8px; }
.game__btn {
  width: 56px; height: 48px;
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--line-2); border-radius: 10px;
  font-size: 16px; cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.game__btn:active { background: var(--panel-2); border-color: var(--accent); color: var(--accent); }
@media (hover: none) and (pointer: coarse) {
  .game__dpad { display: flex; }
}

/* ===== FOOTER ===== */
.footer { border-top: 1px solid var(--line); padding: 28px 0; background: var(--bg-2); }
.footer__inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer__inner span, .footer__inner a { font-size: 14px; color: var(--text-2); }
.footer__inner a:hover { color: var(--accent); }

/* ===== REVEAL ANIMATION ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 920px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__photo { justify-content: flex-start; order: -1; }
  .hero__photo-frame { max-width: 220px; aspect-ratio: 1 / 1; border-radius: 50%; }
}
@media (max-width: 880px) {
  .cards, .ventures, .ventures--two { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav__links {
    position: fixed; inset: 68px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px;
    transform: translateY(-120%); transition: transform .3s ease;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links > a:not(.btn) { padding: 12px 0; width: 100%; }
  .nav__links .btn { margin-top: 8px; }
  .nav__toggle { display: flex; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line); }
  .stat:nth-child(odd) { border-left: none; }
  .stat:nth-child(even) { border-left: 1px solid var(--line); }
  .cards, .ventures, .ventures--two { grid-template-columns: 1fr; }
  .cform__row { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .tl__top { flex-direction: column; gap: 4px; }
  .tl__date { padding-top: 0; }
}