:root {
  --app-vh: 1vh;
  --bg-dark: #050508;
  --bg-panel: #0f1015;
  --bg-panel-light: #1a1a24;
  --bg-glass: rgba(15, 16, 21, 0.85);
  --text-main: #f0f2f5;
  --text-muted: #7a8599;
  --text-gold: #e8c547;
  --accent-gold: #f5c518;
  --accent-gold-light: #ffd84d;
  --accent-gold-dark: #c9a000;
  --accent-gold-glow: rgba(245, 197, 24, 0.5);
  --accent-green: #22c55e;
  --accent-green-glow: rgba(34, 197, 94, 0.45);
  --accent-red: #ef4444;
  --accent-red-glow: rgba(239, 68, 68, 0.45);
  --accent-blue: #3b82f6;
  --glass-blur: 20px;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-main: "Avenir Next", "PingFang SC", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  min-height: 100%;
  font-family: var(--font-main);
  color: var(--text-main);
  overflow-x: hidden;
}

body {
  min-height: calc(var(--app-vh) * 100);
  background: var(--bg-dark);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(245, 197, 24, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse 100% 60% at 80% 10%, rgba(34, 197, 94, 0.06) 0%, transparent 40%),
    radial-gradient(ellipse 80% 50% at 20% 90%, rgba(59, 130, 246, 0.05) 0%, transparent 35%),
    linear-gradient(180deg, #08080c 0%, #050508 50%, #030305 100%);
}

.lobby-bg {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(2px 2px at 20% 30%, rgba(245, 197, 24, 0.2), transparent),
    radial-gradient(2px 2px at 40% 70%, rgba(245, 197, 24, 0.15), transparent),
    radial-gradient(1px 1px at 90% 40%, rgba(255, 255, 255, 0.18), transparent),
    radial-gradient(2px 2px at 60% 80%, rgba(245, 197, 24, 0.1), transparent),
    radial-gradient(1px 1px at 70% 20%, rgba(255, 255, 255, 0.15), transparent);
  animation: particleFloat 20s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes particleFloat {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.6; }
  25% { transform: translateY(-10px) translateX(5px); opacity: 0.8; }
  50% { transform: translateY(-5px) translateX(-5px); opacity: 0.5; }
  75% { transform: translateY(-15px) translateX(3px); opacity: 0.7; }
}

.lobby-root {
  position: relative;
  min-height: calc(var(--app-vh) * 100);
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 24px calc(24px + env(safe-area-inset-bottom));
  z-index: 1;
}

.lobby-card {
  width: min(480px, 100%);
  padding: 36px 40px;
  border-radius: 24px;
  background: linear-gradient(165deg, rgba(20, 20, 28, 0.95) 0%, rgba(10, 10, 15, 0.95) 100%);
  border: 1px solid rgba(245, 197, 24, 0.2);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.7),
    0 0 60px rgba(245, 197, 24, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(var(--glass-blur));
  animation: cardSlideIn 0.6s var(--ease-bounce);
}

@keyframes cardSlideIn {
  from {
    opacity: 0;
    transform: translateY(-30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.chip-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  margin-bottom: 12px;
  padding: 6px 14px;
  background: rgba(245, 197, 24, 0.1);
  border: 1px solid rgba(245, 197, 24, 0.25);
  border-radius: 20px;
  text-transform: uppercase;
  font-weight: 600;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-main) 0%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.subtitle {
  margin: 12px 0 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.room-input {
  width: 100%;
  border: 2px solid rgba(245, 197, 24, 0.2);
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.4);
  color: var(--accent-gold);
  padding: 18px 20px;
  font-size: 2rem;
  font-family: var(--font-mono);
  letter-spacing: 0.4em;
  text-align: center;
  outline: none;
  transition: all 0.25s var(--ease-out);
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
}

.room-input:focus {
  border-color: var(--accent-gold);
  box-shadow:
    0 0 0 4px rgba(245, 197, 24, 0.15),
    inset 0 2px 10px rgba(0, 0, 0, 0.3);
}

.room-input::placeholder {
  color: rgba(122, 133, 153, 0.4);
}

.btn-row {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn {
  border: none;
  border-radius: 14px;
  padding: 16px 20px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

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

.btn-primary {
  color: #111;
  background: linear-gradient(165deg, var(--accent-gold-light) 0%, var(--accent-gold) 50%, var(--accent-gold-dark) 100%);
  box-shadow:
    0 5px 0 #92700c,
    0 8px 20px rgba(245, 197, 24, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 7px 0 #92700c,
    0 12px 30px rgba(245, 197, 24, 0.4);
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow:
    0 2px 0 #92700c,
    0 4px 10px rgba(245, 197, 24, 0.3);
}

.btn-secondary {
  color: var(--text-main);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.04) 100%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.06) 100%);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.3);
}

.btn-ghost {
  margin-top: 14px;
  width: 100%;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.btn-ghost:hover {
  color: var(--accent-gold);
  background: rgba(245, 197, 24, 0.08);
  border-color: rgba(245, 197, 24, 0.2);
}

.status {
  min-height: 28px;
  margin: 16px 4px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
  text-align: center;
  transition: all 0.3s ease;
}

.status.error {
  color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.status.ok {
  color: var(--accent-green);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.status.ok {
  animation: statusPulse 2s ease-in-out infinite;
}

.lan-panel {
  margin-top: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.28);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lan-panel h2 {
  font-size: 0.9rem;
  color: var(--accent-gold);
  letter-spacing: 0.5px;
}

.lan-note {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.lan-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lan-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.lan-url {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #cae6ff;
  overflow-wrap: anywhere;
}

.lan-copy {
  border: none;
  border-radius: 8px;
  padding: 8px 10px;
  background: rgba(245, 197, 24, 0.15);
  color: var(--accent-gold);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

.lan-copy:active {
  transform: translateY(1px);
}

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-gold-dark), var(--accent-gold));
  border-radius: 3px;
}

*:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .lobby-root {
    padding: max(14px, env(safe-area-inset-top)) 14px calc(14px + env(safe-area-inset-bottom));
    align-items: flex-start;
    padding-top: 10vh;
  }

  .lobby-card {
    padding: 28px 24px;
    border-radius: 20px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .room-input {
    font-size: 1.6rem;
    padding: 14px 16px;
    letter-spacing: 0.3em;
  }

  .btn-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .btn {
    padding: 14px 18px;
    font-size: 0.9rem;
  }
}

@media (max-width: 400px) {
  .lobby-card {
    padding: 24px 20px;
  }

  .chip-mark {
    font-size: 0.7rem;
    padding: 5px 10px;
  }

  .subtitle {
    font-size: 0.85rem;
  }
}

@media (max-height: 600px) {
  .lobby-root {
    padding-top: 5vh;
  }

  .lobby-card {
    padding: 24px 28px;
  }

  .subtitle {
    margin-bottom: 18px;
  }

  .btn {
    padding: 12px 16px;
  }
}