:root{
  --bg: #0b0f1a;
  --bg-alt: #121826;
  --card: #1e1e1e;
  --text: #d4d9e3;
  --muted: #a5afbf;
  --heading: #ffffff;
  --accent: #00bfff;
  --accent-2: #ffd700;
  --btn-text: #ffffff;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --container: min(1120px, 92vw);
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}
body{
  margin:0;
  font-family: "Open Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}
h1,h2,h3{
  font-family: "Montserrat", "Open Sans", Arial, sans-serif;
  color: var(--heading);
  line-height: 1.2;
  margin: 0 0 .6rem 0;
  letter-spacing: .2px;
}
h1{ font-size: clamp(2.4rem, 4.2vw + 1rem, 3.5rem); font-weight: 800; }
h2{ font-size: clamp(1.8rem, 2.4vw + .6rem, 2.375rem); font-weight: 800; }
h3{ font-size: clamp(1.2rem, 1.6vw + .6rem, 1.5rem); font-weight: 700; }
p{ margin: 0 0 1rem 0; color: var(--text); }
.muted{ color: var(--muted); }

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

.skip-link{
  position: absolute;
  left: -999px;
  top: -999px;
}
.skip-link:focus{
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 1000;
  background: #000;
  color: #fff;
  padding: .6rem .9rem;
  border-radius: 8px;
  outline: 2px solid var(--accent);
}

.container{ width: var(--container); margin-inline: auto; }

.section{
  position: relative;
  padding-block: clamp(56px, 9vh, 120px);
  overflow: clip;
  scroll-margin-top: 84px; /* avoid fixed header overlap on anchor navigation */
}
.section.alt{ background: var(--bg-alt); }

/* Buttons */
.btn{
  --_bg: transparent;
  --_bd: var(--accent);
  --_tx: var(--btn-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.1rem;
  min-height: 44px; /* mobile tap target */
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid var(--_bd);
  color: var(--_tx);
  background: var(--_bg);
  box-shadow: none;
  transform: translateZ(0);
  transition: transform .15s ease, background-color .2s ease, box-shadow .2s ease, opacity .2s ease;
  text-decoration: none;
  will-change: transform;
}
.btn.primary{
  --_bg: var(--accent);
  --_bd: var(--accent);
  --_tx: #041016;
  color: #041016;
}
.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(0,191,255,.22);
  text-decoration: none;
}
.btn:focus-visible{
  outline: 3px solid color-mix(in oklab, var(--accent), white 25%);
  outline-offset: 2px;
}
.btn.outline{
  --_bg: transparent;
  --_tx: var(--heading);
}

/* Hero */
#hero{
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: clamp(80px, 12vh, 150px);
  background:
    radial-gradient(1200px 600px at 15% 25%, rgba(0,191,255,.12) 0%, transparent 40%),
    radial-gradient(900px 500px at 85% 20%, rgba(255,215,0,.08) 0%, transparent 45%),
    linear-gradient(180deg, #0b0f1a 0%, #0a0e1a 100%);
  position: relative;
}
/* subtle star field */
#hero::before{
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 8% 12%, rgba(255,255,255,.6), transparent 55%),
    radial-gradient(1px 1px at 18% 72%, rgba(255,255,255,.45), transparent 55%),
    radial-gradient(1.2px 1.2px at 32% 28%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 47% 12%, rgba(255,255,255,.4), transparent 62%),
    radial-gradient(1px 1px at 63% 22%, rgba(255,255,255,.55), transparent 55%),
    radial-gradient(1px 1px at 76% 36%, rgba(255,255,255,.5), transparent 55%),
    radial-gradient(1px 1px at 92% 18%, rgba(255,255,255,.5), transparent 55%),
    radial-gradient(1px 1px at 12% 42%, rgba(255,255,255,.45), transparent 55%),
    radial-gradient(1px 1px at 28% 56%, rgba(255,255,255,.55), transparent 55%),
    radial-gradient(1px 1px at 42% 68%, rgba(255,255,255,.45), transparent 55%),
    radial-gradient(1px 1px at 58% 72%, rgba(255,255,255,.5), transparent 55%),
    radial-gradient(1px 1px at 72% 80%, rgba(255,255,255,.4), transparent 55%),
    radial-gradient(1px 1px at 86% 70%, rgba(255,255,255,.5), transparent 55%),
    radial-gradient(1px 1px at 20% 86%, rgba(255,255,255,.6), transparent 55%),
    radial-gradient(1px 1px at 36% 90%, rgba(255,255,255,.5), transparent 55%),
    radial-gradient(1px 1px at 54% 88%, rgba(255,255,255,.45), transparent 55%),
    radial-gradient(1px 1px at 70% 92%, rgba(255,255,255,.55), transparent 55%);
  background-repeat: no-repeat;
  pointer-events: none;
  z-index: 0;
  opacity: .45;
}
#hero .container{ position: relative; z-index: 1; max-width: 920px; }
#hero p.lead{
  font-size: clamp(1rem, 2.2vw + .6rem, 1.2rem);
  color: var(--text);
  margin-inline: auto;
  max-width: 70ch;
}

.arrow-wrap{
  margin-top: clamp(1.5rem, 2.5vh, 2.25rem);
  display: grid;
  place-items: center;
  gap: .5rem;
}
.down-arrow{
  display: inline-grid;
  place-items: center;
  width: 56px; height: 56px;
  min-width: 44px; min-height: 44px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 28px;
  cursor: pointer;
  transition: transform .15s ease, background-color .2s ease, color .2s ease, border-color .2s ease;
  animation: bounce 1.8s infinite ease-in-out;
}
.down-arrow:hover{ background: color-mix(in oklab, var(--accent), black 80%); transform: translateY(-2px); }
.down-arrow:focus-visible{ outline: 3px solid color-mix(in oklab, var(--accent), white 20%); outline-offset: 3px; }
.scroll-prompt{ font-size: .95rem; color: var(--muted); }

@keyframes bounce{
  0%,100%{ transform: translateY(0); }
  30%{ transform: translateY(6px); }
  60%{ transform: translateY(-3px); }
}

/* Mission */
#mission p{ max-width: 75ch; }

/* Team */
#team .subtitle{
  color: var(--muted);
  margin-bottom: 1.25rem;
}
.team-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 1rem;
}
.member{
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .2s ease, background-color .2s ease;
  border: 1px solid rgba(255,255,255,.04);
}
.member:hover{
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(0,0,0,.4);
}
.avatar{
  width: 84px; height: 84px;
  border-radius: 50%;
  background: radial-gradient(120px 120px at 30% 30%, #40d8ff, #0196c9 60%, #0075a6 100%);
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
  color: #03161d;
  font-weight: 800;
  font-family: "Montserrat", sans-serif;
  letter-spacing: .8px;
  box-shadow: inset 0 0 0 3px rgba(255,255,255,.15), 0 10px 30px rgba(0,191,255,.25);
  user-select: none;
}
.member p{ margin: .25rem 0 0; color: var(--muted); }

/* Competition + Stats */
#competition p{ max-width: 75ch; }
.stats{
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  margin: clamp(18px, 3vh, 28px) 0 0;
}
.stat{
  flex: 1 1 220px;
  min-width: 200px;
  background: linear-gradient(180deg, #121a2a 0%, #0f1626 100%);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 20px 22px;
  text-align: center;
  box-shadow: var(--shadow);
}
.number{
  font-size: clamp(2rem, 4.6vw, 3rem);
  font-weight: 800;
  color: var(--heading);
  line-height: 1;
  margin-bottom: .4rem;
  letter-spacing: .5px;
}
.label{ color: var(--muted); font-weight: 600; }

.center{ display: grid; place-items: center; margin-top: 1.1rem; }

/* CTA */
#launch{
  background:
    radial-gradient(1000px 600px at 20% 20%, rgba(0,191,255,.15) 0%, transparent 40%),
    radial-gradient(900px 500px at 80% 0%, rgba(0,191,255,.10) 0%, transparent 45%),
    linear-gradient(180deg, #0c1626 0%, #0b0f1a 100%);
  text-align: center;
}
#launch .container{ max-width: 820px; }
#launch p{ color: var(--muted); font-size: 1.05rem; }

/* Reveal on scroll */
.reveal{ opacity: 0; transform: translateY(12px); transition: opacity .7s ease, transform .6s ease; }
.reveal.is-visible{ opacity: 1; transform: none; }

/* Responsive tweaks */
@media (max-width: 768px){
  #hero p.lead{ font-size: 1rem; }
  .avatar{ width: 90px; height: 90px; }
  .member{ padding: 18px; }
}

/* Stars canvas overlay */
#stars-canvas{
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* Skip animation button */
.stars-skip{
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  font-size: .95rem;
  padding: .6rem .9rem;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.45);
  color: var(--heading);
}
.stars-skip:hover{ background: rgba(0,0,0,.5); }
.stars-skip:focus-visible{ outline: 3px solid color-mix(in oklab, var(--accent), white 25%); outline-offset: 2px; }

/* Ensure hero text is above fullscreen canvas */
#hero .container, #page-hero .container{ position: relative; z-index: 2; }

/* Glassy navbar (Dynamic Island style on desktop, simple header on mobile) */
.nav-wrap{
  position: fixed;
  top: calc(8px + env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: min(980px, 92vw);
  transition: opacity .25s ease, transform .25s ease;
}
.nav{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(13, 20, 34, 0.55);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  transition: padding .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)){
  .nav{ backdrop-filter: blur(10px) saturate(140%); -webkit-backdrop-filter: blur(10px) saturate(140%); }
}
.nav-wrap.scrolled .nav{
  padding: 8px 12px;
  background: rgba(13, 20, 34, 0.68);
  border-color: rgba(255,255,255,.12);
}
.nav-wrap.hide{ opacity: 0; transform: translate(-50%, -12px); pointer-events: none; }

/* Mobile: simple top bar */
@media (max-width: 820px){
  .nav-wrap{ 
    top: 0; 
    left: 0; 
    right: 0; 
    width: 100%; 
    transform: none; 
    background: rgba(13, 20, 34, 0.92);
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  @supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)){
    .nav-wrap{ backdrop-filter: blur(12px) saturate(140%); -webkit-backdrop-filter: blur(12px) saturate(140%); }
  }
  .nav{ 
    border-radius: 0; 
    padding: 12px 16px; 
    background: transparent; 
    border: none; 
    box-shadow: none; 
  }
  .nav-wrap.scrolled .nav{ padding: 10px 16px; }
  .nav-wrap.hide{ opacity: 1; transform: none; }
}

.brand{ font-family: "Montserrat", sans-serif; font-weight: 800; color: var(--heading); letter-spacing: .4px; }

.nav-menu{ list-style: none; display: flex; gap: 10px; margin: 0; padding: 0; align-items: center; }
.nav-menu a{ color: var(--heading); opacity: .95; padding: 12px 14px; border-radius: 999px; min-height: 44px; display: inline-flex; align-items: center; }
.nav-menu a:hover, .nav-menu a:focus-visible{ background: rgba(255,255,255,.08); text-decoration: none; }

.lang-switch{ display: inline-flex; gap: 6px; }
.lang-btn{ font: inherit; padding: 6px 10px; border-radius: 999px; border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.08); color: var(--heading); cursor: pointer; min-height: 36px; }
.lang-btn[aria-pressed="true"]{ background: var(--accent); color: #041016; border-color: var(--accent); }
.lang-btn:focus-visible{ outline: 3px solid color-mix(in oklab, var(--accent), white 25%); outline-offset: 2px; }

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

.nav-toggle{ display: none; width: 44px; height: 44px; padding: 0; border-radius: 8px; border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.08); color: var(--heading); flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; transition: transform .2s ease; }
.nav-toggle:hover{ transform: scale(1.05); background: rgba(255,255,255,.12); }
.nav-toggle .bar{ display: block; width: 20px; height: 2.5px; background: currentColor; border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.nav-wrap.open .nav-toggle .bar:nth-child(1){ transform: translateY(7.5px) rotate(45deg); }
.nav-wrap.open .nav-toggle .bar:nth-child(2){ opacity: 0; }
.nav-wrap.open .nav-toggle .bar:nth-child(3){ transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 820px){
  .nav-toggle{ display: flex; }
  .nav-menu{ 
    position: fixed; 
    top: 0; 
    right: -100%; 
    width: min(320px, 85vw); 
    height: 100vh; 
    height: 100dvh;
    display: flex; 
    flex-direction: column; 
    gap: 8px; 
    padding: 80px 24px 24px; 
    background: rgba(13, 20, 34, 0.96); 
    border-left: 1px solid rgba(255,255,255,.12); 
    box-shadow: -10px 0 40px rgba(0,0,0,0.5);
    z-index: 1001;
    transition: right .3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
  }
  .nav-menu a{ font-size: 1.1rem; padding: 14px 18px; border-radius: 12px; }
  @supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)){
    .nav-menu{ backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%); }
  }
  .nav-wrap.open .nav-menu{ right: 0; }
  /* Lang switch inside sidebar */
  .nav-menu .lang-switch{ 
    display: flex; 
    margin-top: auto; 
    padding-top: 20px; 
    border-top: 1px solid rgba(255,255,255,.1); 
    justify-content: center; 
  }
  .nav-menu .lang-btn{ font-size: 1rem; padding: 10px 16px; }
  /* Overlay */
  .nav-wrap::after{ 
    content: ''; 
    position: fixed; 
    inset: 0; 
    background: rgba(0,0,0,0); 
    pointer-events: none; 
    z-index: 1000; 
    transition: background .3s ease; 
  }
  .nav-wrap.open::after{ background: rgba(0,0,0,0.6); pointer-events: auto; }
}

/* Contact page layout */
.cards-grid{ display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 1rem; }
.card{ background: var(--card); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.06); }
.card h3{ margin-bottom: .35rem; }

/* Form */
.form-grid{ display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; max-width: 760px; margin: 10px auto 0; }
.form-field{ display: grid; gap: 8px; }
.form-field.full{ grid-column: 1 / -1; }
.form-actions{ grid-column: 1 / -1; display: flex; align-items: center; gap: 12px; }
label{ color: var(--heading); font-weight: 600; }
input[type="text"], input[type="email"], textarea{
  width: 100%;
  color: var(--heading);
  background: #0f1626;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  padding: .9rem 1rem;
  min-height: 44px; /* mobile tap target */
  font: inherit;
}
input::placeholder, textarea::placeholder{ color: var(--muted); }
input:focus-visible, textarea:focus-visible{ outline: 3px solid color-mix(in oklab, var(--accent), white 20%); outline-offset: 2px; }
input:invalid, textarea:invalid{ border-color: rgba(255,99,99,.45); }

@media (max-width: 720px){
  .form-grid{ grid-template-columns: 1fr; }
}