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

:root {
  --green:  #00ff41;
  --red:    #ff3333;
  --yellow: #ffd700;
  --blue:   #4488ff;
  --bg:     #060606;
  --bg2:    #0e0e0e;
  --border: #1a2e1a;
  --muted:  #555;
  --text:   #999;
}

body {
  background: var(--bg);
  color: var(--green);
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ── Screens ─────────────────────────────────────────────────────────────── */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 2rem;
}

.hidden { display: none !important; }

/* ── Lobby ─────────────────────────────────────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.logo {
  font-size: 3.5rem;
  letter-spacing: 0.8rem;
  text-shadow: 0 0 30px var(--green), 0 0 60px rgba(0,255,65,0.3);
}

.subtitle {
  font-size: 0.72rem;
  letter-spacing: 0.35rem;
  color: var(--text);
  margin-top: 0.4rem;
}

.holonhub-logo {
  position: fixed;
  top: 1.2rem;
  left: 1.5rem;
  height: 28px;
  opacity: 0.55;
  filter: grayscale(1) brightness(0.8) sepia(1) saturate(6) hue-rotate(85deg);
  z-index: 100;
}

.help-btn {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.65rem;
  letter-spacing: 0.2rem;
  color: #444;
  text-decoration: none;
  border-bottom: 1px solid #222;
  transition: color 0.2s;
}
.help-btn:hover { color: #00ff41; border-color: #00ff41; }

.lobby-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  flex: 1;
  min-height: 0;
}

.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  overflow: hidden;
}

.panel-label {
  font-size: 0.7rem;
  letter-spacing: 0.25rem;
  color: var(--text);
}

.room-code {
  font-size: 5.5rem;
  letter-spacing: 1.2rem;
  color: var(--yellow);
  text-shadow: 0 0 40px rgba(255,215,0,0.6);
  line-height: 1;
}

.qrcode-wrap canvas,
.qrcode-wrap img {
  border: 2px solid var(--green) !important;
  padding: 6px;
  background: #0a0a0a;
}

.join-url {
  font-size: 0.6rem;
  color: var(--muted);
  word-break: break-all;
  text-align: center;
}

.player-list {
  list-style: none;
  width: 100%;
  flex: 1;
  overflow-y: auto;
}

.player-list li {
  padding: 0.5rem 1rem;
  border-left: 3px solid var(--green);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
  animation: slide-in 0.3s ease;
}

@keyframes slide-in {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

.rules-hint {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.7;
}

.btn-primary {
  background: transparent;
  border: 2px solid var(--green);
  color: var(--green);
  font-family: inherit;
  font-size: 1rem;
  padding: 0.8rem 2rem;
  cursor: pointer;
  letter-spacing: 0.2rem;
  transition: background 0.15s, color 0.15s;
  width: 100%;
}

.btn-primary:hover:not(:disabled) {
  background: var(--green);
  color: var(--bg);
}

.btn-primary:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

/* ── Countdown ─────────────────────────────────────────────────────────────── */
.fullcenter {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 1.5rem;
}

.countdown-label {
  font-size: 1.3rem;
  letter-spacing: 0.5rem;
  color: var(--text);
}

.countdown-num {
  font-size: 14rem;
  color: var(--yellow);
  text-shadow: 0 0 80px rgba(255,215,0,0.5);
  line-height: 1;
  animation: pop 0.4s ease;
}

@keyframes pop {
  from { transform: scale(1.3); opacity: 0.5; }
  to   { transform: scale(1);   opacity: 1; }
}

/* ── Game header ────────────────────────────────────────────────────────────── */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.8rem;
  margin-bottom: 1.2rem;
  flex-shrink: 0;
}

.round-label {
  font-size: 0.85rem;
  color: var(--text);
  letter-spacing: 0.15rem;
}

.puzzle-name {
  font-size: 1rem;
  letter-spacing: 0.2rem;
  color: var(--yellow);
}

.timer-wrap {
  font-size: 0.85rem;
  letter-spacing: 0.15rem;
  color: var(--text);
}

.timer {
  font-size: 2rem;
  color: var(--green);
  font-weight: bold;
}

.timer.danger {
  color: var(--red);
  animation: blink 0.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

.puzzle-instruction {
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.1rem;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

/* ── Wire puzzle ────────────────────────────────────────────────────────────── */
.wire-svg {
  width: 100%;
  max-width: 860px;
  margin: 0 auto 1rem;
  display: block;
  flex: 1;
}

.answer-form {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.answer-form label {
  font-size: 0.85rem;
  letter-spacing: 0.15rem;
  color: var(--text);
  white-space: nowrap;
}

.answer-form input {
  background: var(--bg2);
  border: 2px solid var(--green);
  color: var(--green);
  font-family: inherit;
  font-size: 2.2rem;
  padding: 0.4rem 0.8rem;
  width: 110px;
  text-align: center;
  outline: none;
}

.answer-form input:focus { border-color: var(--yellow); }

.btn-submit {
  background: transparent;
  border: 2px solid var(--yellow);
  color: var(--yellow);
  font-family: inherit;
  font-size: 1rem;
  padding: 0.7rem 1.5rem;
  cursor: pointer;
  letter-spacing: 0.15rem;
  transition: background 0.15s, color 0.15s;
}

.btn-submit:hover {
  background: var(--yellow);
  color: var(--bg);
}

/* ── Code puzzle ────────────────────────────────────────────────────────────── */
.safe-display {
  display: flex;
  justify-content: center;
  flex: 1;
  align-items: center;
}

.digit-boxes {
  display: flex;
  gap: 1.2rem;
}

.digit-box {
  width: 90px;
  height: 120px;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--muted);
  transition: border-color 0.2s, color 0.2s, text-shadow 0.2s;
  background: var(--bg2);
}

.digit-box.filled {
  color: var(--green);
  border-color: var(--yellow);
  text-shadow: 0 0 20px var(--green);
}

/* ── Sequence puzzle ────────────────────────────────────────────────────────── */
.seq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
  flex: 1;
  align-content: center;
  padding: 1rem 0;
}

.seq-btn {
  height: 120px;
  border: 3px solid transparent;
  background: var(--bg2);
  font-family: inherit;
  font-size: 1rem;
  letter-spacing: 0.15rem;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}

.seq-btn:hover { filter: brightness(1.3); transform: scale(1.03); }
.seq-btn:active { transform: scale(0.97); }

.seq-btn.pressed {
  opacity: 0.35;
  cursor: not-allowed;
}

.seq-btn .btn-order {
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 1.5rem;
  font-weight: bold;
}

.seq-progress {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text);
  margin-top: 0.5rem;
  flex-shrink: 0;
}

.btn-reset {
  background: transparent;
  border: 1px solid var(--muted);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  letter-spacing: 0.1rem;
  transition: border-color 0.15s, color 0.15s;
}

.btn-reset:hover { border-color: var(--yellow); color: var(--yellow); }

/* ── Result & Game over ─────────────────────────────────────────────────────── */
.result-big {
  font-size: 3.5rem;
  letter-spacing: 0.3rem;
  text-align: center;
}

.result-sub {
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: 0.1rem;
  text-align: center;
}

.next-hint {
  font-size: 0.75rem;
  color: var(--muted);
  animation: blink 2s infinite;
}

.win  { color: var(--green); text-shadow: 0 0 40px rgba(0,255,65,0.5); }
.fail { color: var(--red);   text-shadow: 0 0 40px rgba(255,50,50,0.5); }