:root{
  --bg: #020409;
  --panel: rgba(35,128,186,.11);
  --panel2: rgba(35,128,186,.17);
  --txt: #cdf6ff;
  --muted: rgba(166,231,255,.82);
  --line: rgba(93,244,255,.30);
  --accent: #5df4ff;
  --danger: #9cefff;

  --radius: clamp(0.9rem, 1.4vw, 1.4rem);
  --gap: clamp(0.8rem, 1.3vw, 1.2rem);

  --shadow: 0 0.8rem 2.2rem rgba(0,0,0,.55);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{ box-sizing: border-box; }
html, body{ min-height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(120lvh 120lvh at 10% 0%, rgba(93,244,255,.18), transparent 52%),
              radial-gradient(120lvh 120lvh at 90% 18%, rgba(16,82,126,.22), transparent 58%),
              var(--bg);
  color: var(--txt);
}

.hg-topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(2,6,10,.86);
  border-bottom: 0.1rem solid var(--line);
}

.hg-topbar__inner{
  width: min(110rem, 100%);
  margin: 0 auto;
  padding: min(2.2rem, 4vw) min(2.2rem, 5vw);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
}

.hg-brand{
  display: flex;
  align-items: baseline;
  gap: clamp(.45rem, .9vw, .8rem);
  user-select: none;
}
.hg-brand__dot{
  inline-size: clamp(.8rem, 1vw, 1rem);
  block-size: clamp(.8rem, 1vw, 1rem);
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 1.8rem rgba(93,244,255,.56);
}
.hg-brand__title{
  font-size: clamp(1.2rem, 1.8vw, 1.8rem);
  letter-spacing: .02em;
  font-weight: 800;
}
.hg-brand__subtitle{
  font-size: clamp(1.05rem, 1.4vw, 1.35rem);
  color: var(--muted);
  font-weight: 600;
}
.hg-brand__sep{ color: var(--muted); }

.hg-nav{ display: flex; gap: clamp(.5rem, 1vw, .8rem); flex-wrap: wrap; }

.hg-btn{
  border: 0.1rem solid var(--line);
  background: rgba(35,145,209,.25);
  color: var(--txt);
  border-radius: 999px;
  padding: clamp(.55rem, .9vw, .75rem) clamp(.9rem, 1.6vw, 1.2rem);
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
  cursor: pointer;
  box-shadow: 0 .8rem 1.6rem rgba(0,0,0,.25);
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.hg-btn:hover{ transform: translateY(-0.08rem); background: rgba(35,145,209,.35); border-color: rgba(93,244,255,.56); }
.hg-btn:active{ transform: translateY(0); }
.hg-btn--ghost{ background: rgba(9,44,67,.28); }
.hg-btn--ghost:hover{ background: rgba(9,44,67,.42); }

.hg-main{
  width: min(110rem, 100%);
  margin: 0 auto;
  padding: min(2.2rem, 4vw) min(2.2rem, 5vw);
}

.hg-stage{
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: clamp(1rem, 2vw, 1.6rem);
  align-items: start;
}

.hg-canvas{
  inline-size: 100%;
  block-size: auto;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  border: 0.1rem solid var(--line);
  background: radial-gradient(circle at 50% 40%, rgba(12,46,70,.28), rgba(0,0,0,.92) 74%);
  box-shadow: 0 0 0.12rem rgba(93,244,255,.45), 0 0 1.7rem rgba(24,158,232,.22), var(--shadow);
  outline: none;
}

.hg-panel{
  display: grid;
  gap: var(--gap);
}

.hg-card{
  background: var(--panel);
  border: 0.1rem solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: min(1.7rem, 4vw);
}

.hg-h1{ margin: 0 0 .6rem; font-size: clamp(1.4rem, 2.4vw, 2.1rem); }
.hg-h2{ margin: 0 0 .6rem; font-size: clamp(1.15rem, 1.8vw, 1.5rem); }

.hg-list{
  margin: .6rem 0 0;
  padding: 0 0 0 1.2em;
  color: var(--muted);
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
  line-height: 1.5;
}

kbd{
  display: inline-block;
  padding: .15em .45em;
  border: 0.1rem solid var(--line);
  border-bottom-color: rgba(93,244,255,.40);
  border-radius: .5rem;
  background: rgba(9,44,67,.28);
  font-size: .95em;
  color: var(--txt);
}

.hg-note{
  margin: .85rem 0 0;
  color: var(--muted);
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
  line-height: 1.55;
}
.hg-note--small{ font-size: clamp(.85rem, 1vw, .98rem); }

.hg-stats{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(.6rem, 1vw, .9rem);
}
.hg-stat{
  background: var(--panel2);
  border: 0.1rem solid var(--line);
  border-radius: var(--radius);
  padding: clamp(.65rem, 1vw, .9rem);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .8rem;
}
.hg-stat span{ color: var(--muted); font-size: clamp(.9rem, 1.05vw, 1.02rem); }
.hg-stat strong{ font-size: clamp(1.1rem, 1.5vw, 1.4rem); }

.hg-scores{
  margin: 0;
  padding: 0 0 0 1.2em;
  color: var(--txt);
}
.hg-scores li{
  margin: .35rem 0;
  color: var(--muted);
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
}
.hg-scores li strong{ color: var(--txt); }

.hg-footer{
  border-top: 0.1rem solid var(--line);
  margin-top: min(2.2rem, 4vw);
  padding: min(1.8rem, 4vw) min(2.2rem, 5vw);
  text-align: center;
  color: var(--muted);
  font-size: clamp(.9rem, 1.05vw, 1.02rem);
}
.hg-footer__sep{ margin: 0 .5em; opacity: .7; }

.hg-overlay{
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  padding: min(2.2rem, 5vw);
  background: rgba(0,0,0,.68);
  backdrop-filter: blur(7px);
  z-index: 50;
}
.hg-overlay.is-open{ display: grid; }

.hg-overlay__panel{
  width: min(42rem, 100%);
  background: rgba(2,8,12,.90);
  border: 0.1rem solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1.2rem 3.2rem rgba(0,0,0,.45);
  padding: min(1.8rem, 5vw);
}

.hg-form{ margin-top: 1rem; display: grid; gap: .8rem; }
.hg-label{ font-size: clamp(.95rem, 1.1vw, 1.05rem); color: var(--muted); }
.hg-input{
  width: 100%;
  border-radius: 1rem;
  border: 0.1rem solid var(--line);
  background: rgba(9,44,67,.30);
  color: var(--txt);
  padding: clamp(.65rem, 1vw, .85rem);
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  outline: none;
}
.hg-input:focus{
  border-color: rgba(93,244,255,.62);
  box-shadow: 0 0 0 .35rem rgba(93,244,255,.22);
}

.hg-form__row{ display: flex; gap: .8rem; flex-wrap: wrap; }

@media (max-width: 62rem){
  .hg-stage{ grid-template-columns: 1fr; }
  .hg-topbar__inner{ align-items: start; }
}