* { box-sizing: border-box; }

:root {
  --red: #ff304f;
  --red-soft: #ff8a98;
  --red-dim: rgba(255, 48, 79, 0.18);
  --panel: rgba(4, 1, 4, 0.92);
  --text: #fff3f5;
  --muted: #c9a5ac;
  --font-display: "Orbitron", "Rajdhani", ui-sans-serif, system-ui, sans-serif;
}

html {
  min-height: 100%;
  scrollbar-color: var(--red) #050105;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Rajdhani", ui-sans-serif, system-ui, sans-serif;
  background:
    radial-gradient(circle at 50% 2%, rgba(255, 48, 79, 0.2), transparent 24%),
    linear-gradient(rgba(255, 48, 79, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 48, 79, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, #050105, #020103 54%, #130207);
  background-size: auto, 36px 36px, 36px 36px, auto;
}

button,
input {
  font: inherit;
}

button,
a {
  color: inherit;
}

.duel-shell {
  min-height: 100vh;
  padding: clamp(14px, 1.7vw, 28px);
  display: grid;
  gap: clamp(14px, 1.4vw, 22px);
}

.panel {
  border: 1px solid rgba(255, 48, 79, 0.62);
  border-radius: 6px;
  background:
    linear-gradient(var(--red), var(--red)) top left / 54px 1px no-repeat,
    linear-gradient(var(--red), var(--red)) top left / 1px 54px no-repeat,
    linear-gradient(var(--red), var(--red)) bottom right / 54px 1px no-repeat,
    linear-gradient(var(--red), var(--red)) bottom right / 1px 54px no-repeat,
    linear-gradient(rgba(255, 48, 79, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 48, 79, 0.04) 1px, transparent 1px),
    var(--panel);
  background-size: 54px 1px, 1px 54px, 54px 1px, 1px 54px, 28px 28px, 28px 28px, auto;
  box-shadow: 0 0 26px rgba(255, 48, 79, 0.16), inset 0 0 22px rgba(255, 48, 79, 0.04);
}

.duel-header {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 52px;
  align-items: center;
}

.duel-header img {
  width: min(360px, 72vw);
  max-height: 116px;
  justify-self: center;
  object-fit: contain;
  filter: drop-shadow(0 0 18px rgba(255, 48, 79, 0.76));
}

.icon-link {
  width: 46px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 48, 79, 0.55);
  border-radius: 6px;
  text-decoration: none;
  background: rgba(3, 1, 4, 0.75);
  box-shadow: 0 0 18px rgba(255, 48, 79, 0.2);
}

.duel-hero {
  padding: clamp(18px, 2vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
}

.eyebrow,
.duel-hero h1,
.duel-hero p,
.duel-stats,
.room-panel h2,
.systems-panel h2,
.arena-toolbar span,
.arena-toolbar strong {
  text-transform: uppercase;
}

.eyebrow {
  color: var(--red-soft);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.22em;
}

.duel-hero h1 {
  margin: 6px 0 0;
  color: #fff6f7;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 5rem);
  line-height: 0.95;
  letter-spacing: 0.12em;
  text-shadow: 0 0 22px rgba(255, 48, 79, 0.82);
}

.duel-hero p {
  max-width: 760px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.duel-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 10px;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.duel-stats span {
  min-width: 108px;
  padding: 12px;
  border: 1px solid rgba(255, 48, 79, 0.36);
  background: rgba(255, 48, 79, 0.06);
}

.duel-stats b {
  display: block;
  color: var(--red);
  font-size: 1.5rem;
}

.duel-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.65fr) minmax(260px, 0.72fr);
  gap: clamp(14px, 1.4vw, 22px);
  align-items: stretch;
}

.room-panel,
.systems-panel {
  padding: 18px;
  display: grid;
  align-content: start;
  gap: 14px;
}

.room-panel h2,
.systems-panel h2 {
  margin: 0;
  color: var(--red);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.16em;
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid rgba(255, 48, 79, 0.34);
  border-radius: 5px;
  overflow: hidden;
}

.mode-toggle button,
.room-actions button,
.join-button,
#startMatchButton {
  border: 1px solid rgba(255, 48, 79, 0.5);
  color: #fff4f5;
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: linear-gradient(180deg, rgba(255, 48, 79, 0.18), rgba(4, 1, 4, 0.92));
  cursor: pointer;
}

.mode-toggle button {
  min-height: 42px;
  border: 0;
}

.mode-toggle .is-active {
  color: #090104;
  background: var(--red);
  box-shadow: 0 0 18px rgba(255, 48, 79, 0.52);
}

.room-code {
  padding: 16px;
  border: 1px solid rgba(255, 48, 79, 0.48);
  color: #fff;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.14em;
  text-align: center;
  background: rgba(255, 48, 79, 0.08);
  text-shadow: 0 0 14px rgba(255, 48, 79, 0.72);
}

.room-panel p,
.systems-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.28;
}

.room-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.room-actions button,
.join-button,
#startMatchButton {
  min-height: 44px;
  border-radius: 5px;
}

.room-actions i,
#startMatchButton i {
  margin-right: 8px;
  color: var(--red);
}

.join-field {
  display: grid;
  gap: 6px;
  color: var(--red-soft);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.join-field input {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid rgba(255, 48, 79, 0.42);
  border-radius: 5px;
  color: #fff;
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  background: rgba(2, 1, 3, 0.86);
}

.arena-panel {
  min-width: 0;
  padding: 14px;
  display: grid;
  grid-template-rows: auto minmax(360px, 1fr);
  gap: 12px;
}

.arena-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.arena-toolbar span {
  display: block;
  color: var(--red-soft);
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.arena-toolbar strong {
  display: block;
  margin-top: 4px;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.12em;
}

#duelBoard {
  width: 100%;
  height: 100%;
  min-height: 360px;
  border: 1px solid rgba(255, 48, 79, 0.48);
  border-radius: 4px;
  background: #040105;
}

.systems-panel article {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(255, 48, 79, 0.28);
  background: rgba(255, 48, 79, 0.045);
}

.systems-panel i {
  width: 38px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--red);
  border-radius: 6px;
  color: var(--red);
  box-shadow: 0 0 16px rgba(255, 48, 79, 0.32);
}

.systems-panel strong {
  display: block;
  color: #fff5f6;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.systems-panel p {
  margin-top: 5px;
}

@media (max-width: 1120px) {
  .duel-hero,
  .duel-layout {
    grid-template-columns: 1fr;
  }

  .duel-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .duel-shell {
    padding: 8px;
  }

  .duel-header {
    grid-template-columns: 44px minmax(0, 1fr) 44px;
  }

  .icon-link {
    width: 40px;
  }

  .duel-stats,
  .room-actions {
    grid-template-columns: 1fr;
  }

  .arena-toolbar {
    display: grid;
  }
}