:root {
  --bg-deep: #0c100e;
  --bg-mid: #141a16;
  --blood: #c43c2a;
  --blood-hot: #e85a3a;
  --sick: #6b8f4e;
  --bone: #e8dfc8;
  --mute: #8a9185;
  --ink: #050705;
  --font-display: "Bebas Neue", Impact, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--bone);
  background: var(--bg-deep);
  line-height: 1.55;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 60% at 70% 20%, rgba(196, 60, 42, 0.18), transparent 55%),
    radial-gradient(ellipse 70% 50% at 15% 80%, rgba(107, 143, 78, 0.12), transparent 50%),
    linear-gradient(165deg, #0a0e0b 0%, #121814 45%, #0d1210 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  pointer-events: none;
}

a {
  color: var(--bone);
  text-decoration: none;
}

a:hover {
  color: var(--blood-hot);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: 0.06em;
  color: var(--blood-hot);
}

.nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.nav a {
  color: var(--mute);
}

.nav a:hover {
  color: var(--bone);
}

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  min-height: calc(100vh - 5rem);
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  line-height: 0.9;
  letter-spacing: 0.04em;
  color: var(--blood);
  margin: 0 0 0.75rem;
  text-shadow: 0 0 40px rgba(196, 60, 42, 0.35);
  animation: brand-pulse 4s ease-in-out infinite;
}

@keyframes brand-pulse {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.15); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin: 0 0 1rem;
  color: var(--bone);
  max-width: 14ch;
}

.lead {
  margin: 0 0 2rem;
  color: var(--mute);
  max-width: 36ch;
  font-size: 1.05rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-play {
  background: var(--blood);
  color: var(--bone);
  border-color: var(--blood-hot);
}

.btn-play:hover {
  background: var(--blood-hot);
  color: var(--ink);
}

.btn-ghost {
  background: transparent;
  color: var(--bone);
  border-color: rgba(232, 223, 200, 0.35);
}

.btn-ghost:hover {
  border-color: var(--bone);
  color: var(--bone);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.arena-preview {
  position: relative;
  width: min(100%, 380px);
  aspect-ratio: 1;
  border: 1px solid rgba(232, 223, 200, 0.12);
  background:
    radial-gradient(circle at 50% 55%, rgba(196, 60, 42, 0.12), transparent 45%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 24px,
      rgba(232, 223, 200, 0.03) 24px,
      rgba(232, 223, 200, 0.03) 25px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 24px,
      rgba(232, 223, 200, 0.03) 24px,
      rgba(232, 223, 200, 0.03) 25px
    ),
    #0f1511;
  overflow: hidden;
  animation: arena-glow 5s ease-in-out infinite;
}

@keyframes arena-glow {
  0%, 100% { box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.6); }
  50% { box-shadow: inset 0 0 80px rgba(196, 60, 42, 0.15); }
}

.pv-player {
  position: absolute;
  left: 50%;
  top: 55%;
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  border-radius: 50%;
  background: var(--bone);
  box-shadow: 0 0 0 3px var(--sick);
  animation: player-sway 2.4s ease-in-out infinite;
}

@keyframes player-sway {
  0%, 100% { transform: translateX(-18px); }
  50% { transform: translateX(18px); }
}

.pv-m {
  position: absolute;
  border-radius: 50%;
  animation: creep 3.2s linear infinite;
}

.pv1 { width: 18px; height: 18px; background: #5a8a3a; left: 12%; top: 18%; animation-delay: 0s; }
.pv2 { width: 22px; height: 22px; background: #8b4518; right: 16%; top: 28%; animation-delay: -0.8s; animation-name: creep2; }
.pv3 { width: 26px; height: 26px; background: #4a2a5a; left: 22%; bottom: 18%; animation-delay: -1.4s; animation-name: creep3; }
.pv4 { width: 30px; height: 30px; background: #a01818; right: 20%; bottom: 22%; animation-delay: -2s; animation-name: creep4; }

@keyframes creep {
  0% { transform: translate(0, 0); opacity: 0.9; }
  100% { transform: translate(90px, 90px); opacity: 0.35; }
}
@keyframes creep2 {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-80px, 70px); }
}
@keyframes creep3 {
  0% { transform: translate(0, 0); }
  100% { transform: translate(70px, -75px); }
}
@keyframes creep4 {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-75px, -70px); }
}

.arena-doom {
  background:
    linear-gradient(180deg, #1a1520 0%, #1a1520 48%, #2a2218 48%, #2a2218 100%),
    #0f1511;
}

.arena-doom .pv-hall {
  position: absolute;
  left: 50%;
  top: 0;
  width: 42%;
  height: 100%;
  margin-left: -21%;
  background: linear-gradient(90deg, #3a2020, #6a3a3a 40%, #5a3030 60%, #3a2020);
  clip-path: polygon(20% 0, 80% 0, 100% 100%, 0 100%);
  opacity: 0.85;
}

.arena-doom .pv-door {
  position: absolute;
  left: 50%;
  top: 28%;
  width: 48px;
  height: 70px;
  margin-left: -24px;
  background: linear-gradient(180deg, #c48a20, #6a4a10);
  border: 2px solid #8a5a10;
  animation: door-pulse 2.8s ease-in-out infinite;
}

@keyframes door-pulse {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.72); transform-origin: top center; }
}

.arena-doom .pv1 {
  width: 36px;
  height: 52px;
  border-radius: 8px 8px 4px 4px;
  background: #b84a20;
  left: 28%;
  top: 38%;
  animation: doom-lurch 2.4s ease-in-out infinite;
}

.arena-doom .pv2 {
  width: 48px;
  height: 64px;
  border-radius: 10px 10px 4px 4px;
  background: #b03070;
  right: 22%;
  top: 34%;
  animation: doom-lurch 2.4s ease-in-out infinite reverse;
}

@keyframes doom-lurch {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

.arena-doom .pv-gun {
  position: absolute;
  right: 18%;
  bottom: 0;
  width: 120px;
  height: 70px;
  background: linear-gradient(180deg, #5a4030, #2a2a28);
  clip-path: polygon(10% 40%, 70% 30%, 100% 45%, 85% 100%, 0 100%);
}

.section {
  max-width: 900px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.section-alt {
  background: rgba(0, 0, 0, 0.28);
  max-width: none;
  padding-left: max(1.5rem, calc((100% - 900px) / 2));
  padding-right: max(1.5rem, calc((100% - 900px) / 2));
}

.section h2 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  letter-spacing: 0.05em;
  margin: 0 0 1rem;
  color: var(--blood-hot);
}

.section p {
  margin: 0;
  color: var(--mute);
  max-width: 55ch;
}

.controls-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.controls-list li {
  color: var(--mute);
}

kbd {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border: 1px solid rgba(232, 223, 200, 0.3);
  background: rgba(232, 223, 200, 0.08);
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--bone);
}

.monster-roster {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem 1rem;
  counter-reset: m;
}

.monster-roster li {
  counter-increment: m;
  color: var(--mute);
  font-size: 0.95rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(232, 223, 200, 0.08);
}

.monster-roster li::before {
  content: counter(m) ". ";
  color: var(--blood);
  font-weight: 600;
}

.footer {
  text-align: center;
  padding: 2.5rem 1rem 3rem;
  color: var(--mute);
  font-size: 0.85rem;
  border-top: 1px solid rgba(232, 223, 200, 0.08);
}

@media (max-width: 800px) {
  .nav { display: none; }
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 1rem;
  }
  .hero-visual { order: -1; }
  .arena-preview { width: min(100%, 280px); }
}