body.welcome-page {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 45%, rgba(39, 92, 65, .24), transparent 42rem),
    #03100b;
}

.welcome-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 4.75rem .5rem .75rem;
}

.duel-stage {
  position: relative;
  isolation: isolate;
  width: min(1448px, calc(100vw - 1rem), calc((100vh - 5.5rem) * 1.3333));
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--dp-gold) 52%, #22342b);
  border-radius: clamp(1rem, 1.7vw, 1.75rem);
  background: #07140f;
  box-shadow: 0 34px 90px rgba(0, 0, 0, .58);
}

.duel-art {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  user-select: none;
  pointer-events: none;
}

.duel-vignette {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 50% 52%, transparent 0 29%, rgba(2, 8, 5, .08) 55%, rgba(1, 5, 3, .36) 100%),
    linear-gradient(180deg, rgba(2, 8, 5, .08), transparent 42%, rgba(2, 8, 5, .18));
  pointer-events: none;
}

.login-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  padding: 1rem;
  transform: translateX(13px);
  pointer-events: none;
}

.gong-panel {
  width: clamp(300px, 24.8%, 360px);
  padding: 1.35rem 1.25rem 1.2rem;
  transform: translateY(1.25%);
  border: 1px solid rgba(210, 171, 82, .55);
  border-radius: 1.35rem;
  color: #f6edd8;
  background: rgba(6, 25, 17, .965);
  box-shadow:
    0 16px 42px rgba(0, 0, 0, .48),
    inset 0 0 0 1px rgba(255, 238, 184, .04);
  backdrop-filter: blur(10px);
  pointer-events: auto;
}

.gong-panel h1 {
  margin: 0 0 .15rem;
  color: #f6e7bd;
  font-size: clamp(1.55rem, 2.4vw, 2.15rem);
  font-weight: 800;
  letter-spacing: .02em;
  text-align: center;
}

.gong-subtitle {
  margin-bottom: 1rem;
  color: #c9bea1;
  font-size: .9rem;
  text-align: center;
}

.gong-panel form {
  width: 100%;
  margin: 0;
}

.gong-panel .form-control {
  min-height: 54px;
  color: #f4ecdc;
  background-color: rgba(4, 17, 12, .94);
  border-color: rgba(190, 151, 68, .55);
}

.gong-panel .form-control:focus {
  color: #fff9ea;
  background-color: rgba(4, 17, 12, .98);
  border-color: #d0a64e;
  box-shadow: 0 0 0 .2rem rgba(184, 141, 52, .2);
}

.gong-panel .form-floating > label {
  color: #a9a48f;
}

.gong-panel .btn-primary {
  min-height: 46px;
  border-color: #156a46;
  background: linear-gradient(180deg, #23865d, #176d4b);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .22);
  font-weight: 700;
}

.gong-panel .btn-primary:hover,
.gong-panel .btn-primary:focus {
  border-color: #2ca674;
  background: linear-gradient(180deg, #2a9b6d, #1b7954);
}

.login-error {
  margin: .8rem 0 0;
  padding: .65rem .75rem;
  border: 1px solid rgba(217, 94, 94, .45);
  border-radius: .6rem;
  color: #ffd6d6;
  background: rgba(83, 24, 27, .9);
  font-size: .86rem;
}

.login-meta {
  margin: .85rem 0 0;
  color: #bbae91;
  font-size: .76rem;
  text-align: center;
}

.welcome-theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 40;
  width: auto;
  color: #f1ead8;
  border-color: rgba(224, 196, 133, .5);
  background: rgba(5, 19, 13, .94);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .28);
  backdrop-filter: blur(10px);
}

.welcome-theme-toggle:hover,
.welcome-theme-toggle:focus {
  color: #fff6dd;
  background: rgba(21, 55, 39, .98);
}

@media (max-width: 800px) {
  .welcome-shell {
    padding: 4.5rem .35rem .5rem;
  }

  .duel-stage {
    width: 100%;
    height: calc(100vh - 5rem);
    min-height: 600px;
    aspect-ratio: auto;
    border-radius: 1rem;
  }

  .duel-art {
    object-fit: cover;
    object-position: center;
  }

  .duel-vignette {
    background:
      radial-gradient(circle at 50% 50%, transparent 0 25%, rgba(1, 7, 4, .12) 54%, rgba(1, 5, 3, .5) 100%),
      linear-gradient(180deg, rgba(2, 8, 5, .06), transparent 45%, rgba(2, 8, 5, .22));
  }

  .login-overlay {
    transform: translateX(8px);
  }

  .gong-panel {
    width: min(86vw, 340px);
    padding: 1.2rem 1rem 1.05rem;
    transform: none;
    border-radius: 1.2rem;
  }

  .welcome-theme-toggle {
    top: .7rem;
    right: .7rem;
  }
}

@media (max-height: 660px) and (orientation: landscape) {
  .welcome-shell {
    padding-top: 3.8rem;
  }

  .duel-stage {
    width: min(1040px, calc(100vw - 1rem));
    height: calc(100vh - 4.3rem);
    min-height: 0;
    aspect-ratio: auto;
  }

  .gong-panel {
    width: min(325px, 33vw);
    padding: .9rem .95rem;
  }

  .gong-panel h1 {
    font-size: 1.45rem;
  }

  .gong-subtitle,
  .login-meta {
    margin-bottom: .6rem;
  }

  .gong-panel .form-control {
    min-height: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .duel-stage,
  .gong-panel {
    scroll-behavior: auto;
  }
}