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

:root {
  --bg: #07071a;
  --bg2: #0e0e2e;
  --accent: #7c3aed;
  --accent2: #06b6d4;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --heart: #ef4444;
  --gold: #f59e0b;
  --green: #10b981;
  --radius: 12px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  overflow-x: hidden;
}

.screen { min-height: 100vh; }
.hidden { display: none !important; }

h1 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  letter-spacing: 0.12em;
  font-weight: 900;
  text-transform: uppercase;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.2em;
}

h1 .title-text {
  background: linear-gradient(90deg,
    #06b6d4 0%,
    #7c3aed 30%,
    #f59e0b 55%,
    #10b981 75%,
    #06b6d4 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: titleShimmer 3s linear infinite, titleDrop 0.6s cubic-bezier(0.34,1.56,0.64,1) both;
  filter: drop-shadow(0 0 14px rgba(6,182,212,0.55)) drop-shadow(0 0 28px rgba(124,58,237,0.35));
  transition: letter-spacing 0.3s;
}

h1:hover .title-text {
  letter-spacing: 0.18em;
}

h1 .emoji {
  -webkit-text-fill-color: initial;
  background: none;
  display: inline-block;
  animation: emojiParty 1.8s ease-in-out infinite;
  transform-origin: 50% 80%;
}

.tetris-icon {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  vertical-align: middle;
  animation: blockSequence 4s ease-in-out infinite;
  transform-origin: center center;
  margin-right: 4px;
  filter: drop-shadow(0 0 6px rgba(6,182,212,0.8));
}

.t-row {
  display: flex;
  gap: 2px;
}

.t-cell {
  width: clamp(9px, 1.4vw, 16px);
  height: clamp(9px, 1.4vw, 16px);
  border-radius: 2px;
}

.t-cell.off {
  background: transparent;
}

.t-cell.c1 {
  background: #06b6d4;
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #06b6d4aa;
  animation: cellPulse1 4s ease-in-out infinite;
}

.t-cell.c2 {
  background: #7c3aed;
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #7c3aedaa;
  animation: cellPulse2 4s ease-in-out infinite;
}

.t-cell.c3 {
  background: #10b981;
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #10b981aa;
  animation: cellPulse3 4s ease-in-out infinite;
}

@keyframes blockSequence {
  0%          { transform: translateY(0)    rotate(0deg);   }
  10%         { transform: translateY(-6px) rotate(0deg);   }
  25%         { transform: translateY(-6px) rotate(90deg);  }
  35%         { transform: translateY(0)    rotate(90deg);  }
  40%         { transform: translateY(6px)  rotate(90deg);  }
  50%         { transform: translateY(0)    rotate(90deg);  }
  60%         { transform: translateY(-5px) rotate(90deg);  }
  75%         { transform: translateY(-5px) rotate(180deg); }
  85%         { transform: translateY(4px)  rotate(180deg); }
  90%         { transform: translateY(0)    rotate(180deg); }
  95%         { transform: translateY(0)    rotate(270deg); }
  100%        { transform: translateY(0)    rotate(360deg); }
}

@keyframes cellPulse1 {
  0%, 100% { background: #06b6d4; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #06b6d4aa; }
  33%      { background: #f59e0b; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #f59e0baa; }
  66%      { background: #ef4444; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #ef4444aa; }
}

@keyframes cellPulse2 {
  0%, 100% { background: #7c3aed; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #7c3aedaa; }
  33%      { background: #10b981; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #10b981aa; }
  66%      { background: #06b6d4; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #06b6d4aa; }
}

@keyframes cellPulse3 {
  0%, 100% { background: #10b981; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 6px #10b981aa; }
  33%      { background: #7c3aed; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #7c3aedaa; }
  66%      { background: #f59e0b; box-shadow: inset 0 2px 0 rgba(255,255,255,0.35), 0 0 8px #f59e0baa; }
}


@keyframes titleShimmer {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

@keyframes titleDrop {
  0%   { opacity: 0; transform: translateY(-30px) scale(0.8); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.lobby-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid #1e1e4a;
  background: var(--bg2);
}

.lobby-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-mute {
  background: transparent;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 2px;
  transition: transform 0.1s;
}

.btn-mute:hover { transform: scale(1.15); }

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 90px;
  height: 4px;
  border-radius: 2px;
  background: #2a2a5a;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent2);
  cursor: pointer;
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent2);
  border: none;
  cursor: pointer;
}

.room-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.room-code {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--gold);
  font-family: monospace;
}

.lobby-body {
  display: flex;
  gap: 40px;
  padding: 40px;
  min-height: calc(100vh - 90px);
  align-items: flex-start;
  justify-content: center;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.qr-panel {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: var(--bg2);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid #1e1e4a;
}

.scan-hint {
  color: var(--text-dim);
  font-size: 0.9rem;
}

#qr-img {
  width: 220px;
  height: 220px;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
}

.join-url {
  font-size: 0.72rem;
  color: var(--accent2);
  word-break: break-all;
  text-align: center;
}

.players-lobby {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 220px;
  max-width: 340px;
}

.players-lobby h2 {
  font-size: 1.4rem;
  color: var(--text);
  font-weight: 700;
}

#player-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 50vh;
  overflow-y: auto;
}

.lobby-player {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg2);
  border-radius: var(--radius);
  border: 1px solid #1e1e4a;
  font-size: 1.05rem;
  animation: fadeIn 0.3s ease;
}

.lobby-player-name {
  flex: 1;
}

.btn-kick {
  background: transparent;
  border: 1.5px solid #3a1a1a;
  color: #e55;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.btn-kick:hover {
  background: #f005;
  border-color: #e55;
}

.qr-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}

.btn-toggle-qr {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  background: transparent;
  border: 1.5px solid #2a2a5a;
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn-toggle-qr:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.btn-copy-link {
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  background: transparent;
  border: 1.5px solid #2a2a5a;
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  width: 100%;
}

.btn-copy-link:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.qr-hidden {
  display: none !important;
}

@keyframes fadeIn { from { opacity:0; transform: translateX(-10px); } to { opacity:1; transform: none; } }

.slot-badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  min-width: 32px;
  text-align: center;
}

.btn-start {
  padding: 16px 40px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
  align-self: flex-start;
  margin-top: 10px;
}

.btn-start:hover:not(:disabled) { transform: scale(1.04); }
.btn-start:disabled { opacity: 0.35; cursor: not-allowed; }

.how-to-play {
  flex: 1;
  background: var(--bg2);
  border: 1px solid #1e1e4a;
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 220px;
  max-width: 420px;
  align-self: flex-start;
}

.how-to-play h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent2);
  font-weight: 700;
  margin: 0;
}

.how-to-play ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.how-to-play li {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.how-to-play li strong {
  color: var(--text);
}

.how-to-play-credit {
  margin-top: 16px;
  font-size: 0.78rem;
  color: #4a4a7a;
  text-align: center;
  border-top: 1px solid #1e1e4a;
  padding-top: 10px;
}

.controls-section {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.controls-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.controls-img {
  width: 110px;
  height: auto;
  border-radius: 8px;
  border: 1px solid #1e1e4a;
  object-fit: contain;
  flex-shrink: 0;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 30px;
  background: var(--bg2);
  border-bottom: 1px solid #1e1e4a;
}

.game-info {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--text-dim);
}

.game-info strong { color: var(--text); }

.boards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 24px;
  justify-content: center;
  align-items: flex-start;
}

.board-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--bg2);
  border-radius: var(--radius);
  padding: 12px;
  border: 1px solid #1e1e4a;
  transition: border-color 0.3s;
}

.board-wrapper:hover { border-color: var(--accent); }

.player-label {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 0 4px;
}

.player-name {
  font-weight: 700;
  font-size: 0.9rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-hearts { font-size: 0.85rem; }

.round-pips {
  display: flex;
  gap: 3px;
  align-items: center;
  margin-left: 4px;
}

.round-pip {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: #1e1e4a;
  border: 1.5px solid #2a2a5a;
  transition: background 0.2s, border-color 0.2s;
}

.round-pip.filled {
  background: #10b981;
  border-color: #10b981;
  box-shadow: 0 0 5px #10b981aa;
}

.eliminated-overlay, .won-overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}

.eliminated-overlay {
  background: rgba(10,10,26,0.82);
  color: var(--heart);
}

.won-overlay {
  background: rgba(10,10,26,0.82);
  color: var(--gold);
}

.board-flash {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  pointer-events: none;
  animation: boardFlash 0.45s ease-out forwards;
  z-index: 5;
}

@keyframes boardFlash {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}

.round-banner {
  position: absolute;
  left: 50%;
  top: 30%;
  transform: translateX(-50%);
  background: rgba(16,185,129,0.92);
  color: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  z-index: 10;
  pointer-events: none;
  white-space: nowrap;
  animation: bannerPop 1.8s cubic-bezier(0.34,1.56,0.64,1) forwards;
  box-shadow: 0 0 24px rgba(16,185,129,0.7), 0 4px 16px rgba(0,0,0,0.5);
}

.heart-banner {
  position: absolute;
  left: 50%;
  top: 30%;
  transform: translateX(-50%);
  background: rgba(239,68,68,0.92);
  color: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  z-index: 10;
  pointer-events: none;
  white-space: nowrap;
  animation: bannerPop 1.6s cubic-bezier(0.34,1.56,0.64,1) forwards;
  box-shadow: 0 0 24px rgba(239,68,68,0.7), 0 4px 16px rgba(0,0,0,0.5);
}

.rb-name {
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.85;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rb-text {
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

@keyframes bannerPop {
  0%   { opacity: 0; transform: translateX(-50%) scale(0.5) translateY(10px); }
  15%  { opacity: 1; transform: translateX(-50%) scale(1.08) translateY(0); }
  30%  { transform: translateX(-50%) scale(1) translateY(0); }
  75%  { opacity: 1; transform: translateX(-50%) scale(1) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) scale(0.9) translateY(-12px); }
}

.particle {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  left: var(--px);
  top: var(--py);
  pointer-events: none;
  z-index: 12;
  animation: particleFly 0.9s ease-out forwards;
}

@keyframes particleFly {
  0%   { opacity: 1; transform: translate(0, 0) rotate(0deg); }
  100% { opacity: 0; transform: translate(var(--vx), var(--vy)) rotate(360deg); }
}

#end-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, #1a0a3a 0%, var(--bg) 70%);
}

.end-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  padding: 40px;
}

.winner-text {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold);
}

#final-scores {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 360px;
}

.score-row {
  display: flex;
  gap: 14px;
  align-items: center;
  background: var(--bg2);
  border-radius: 10px;
  padding: 12px 20px;
  border: 1px solid #1e1e4a;
}

.pos { font-weight: 900; font-size: 1.1rem; color: var(--gold); min-width: 32px; }
.pname { flex: 1; font-weight: 700; }
.pround { font-size: 0.85rem; color: var(--accent2); }
.pscore { font-size: 0.85rem; color: var(--text-dim); }

.btn-reset {
  padding: 14px 36px;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--green), var(--accent2));
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  transition: transform 0.15s;
  margin-top: 10px;
}

.btn-reset:hover { transform: scale(1.04); }

.site-footer {
  text-align: center;
  padding: 14px 20px;
  font-size: 0.78rem;
  color: #444477;
  border-top: 1px solid #1a1a3a;
  letter-spacing: 0.04em;
}

.site-footer a {
  color: #7c3aed;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}