:root {
  --bg-primary: #FFF5F5;
  --bg-surface: rgba(255, 182, 193, 0.08);
  --border: #FFD1DC;
  --text-primary: #5D4037;
  --text-secondary: #8D6E63;
  --accent-red: #FF6B6B;
  --accent-blue: #64B5F6;
  --accent-green: #81C784;
  --accent-purple: #CE93D8;
  --accent-gold: #FFD54F;
  --accent-teal: #4DB6AC;
}

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;
  overflow: hidden;
}

/* ── Screens ── */

.screen {
  display: none;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
}

.screen.active {
  display: flex;
}

.hidden {
  display: none !important;
}

/* ── Login Screen ── */

#screen-login {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(180deg, #FFE4E1 0%, #E8D5F5 50%, #FFF0F5 100%);
}

.login-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.login-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: 420px;
  padding: 0 24px;
}

.login-subtitle {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.login-title {
  font-size: 56px;
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 700;
  background: linear-gradient(135deg, #FF6B6B, #FFD54F, #FF6B6B);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  text-align: center;
}

.login-eng {
  font-size: 12px;
  letter-spacing: 0.5em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.login-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
  margin: 8px 0;
}

.login-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.btn-google,
.btn-apple {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.1s;
}

.btn-google:hover,
.btn-apple:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-google:active,
.btn-apple:active {
  transform: translateY(0);
}

.btn-google {
  background: #fff;
  color: #333;
}

.btn-apple {
  background: #333;
  color: #fff;
  border: 1px solid #555;
}

.btn-guest {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 24px;
  border: 2px solid #9C7CF4;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  background: rgba(156, 124, 244, 0.15);
  color: #9C7CF4;
  margin-top: 12px;
  transition: background 0.2s, transform 0.1s;
}
.btn-guest:hover {
  background: rgba(156, 124, 244, 0.3);
  transform: translateY(-1px);
}
.btn-guest:active {
  transform: translateY(0);
}
.login-guest-hint {
  font-size: 12px;
  color: #B39DDB;
  margin-top: 8px;
  text-align: center;
}
.guest-login-prompt {
  text-align: center;
  padding: 24px 16px;
}

.login-footer {
  font-size: 11px;
  color: #8D6E63;
  margin-top: 8px;
}

/* ── Lobby Screen ── */

#screen-lobby {
  flex-direction: column;
}

.lobby-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.lobby-logo {
  font-size: 18px;
  font-family: Georgia, serif;
  font-weight: 700;
  background: linear-gradient(135deg, #FF6B6B, #FFD54F);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lobby-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lobby-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF6B6B, #CE93D8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

#lobby-username {
  font-size: 14px;
  color: var(--text-secondary);
}

.lobby-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 24px;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.lobby-left {
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: hidden;
  min-height: 0;
}

.lobby-right {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

/* Stats grid */

.lobby-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
}

.stat-value.gold { color: var(--accent-gold); }
.stat-value.teal { color: var(--accent-teal); }
.stat-value.red  { color: var(--accent-red); }
.stat-value.green { color: var(--accent-green); }
.stat-value.purple { color: var(--accent-purple); }

/* Run history & leaderboard tables */

.lobby-history,
.lobby-leaderboard {
  overflow: auto;
  flex: 1;
  min-height: 0;
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.lb-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}
.lb-tab {
  flex: 1;
  padding: 5px 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.lb-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 6px 10px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  text-align: left;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr.highlight td {
  color: var(--accent-gold);
  font-weight: 600;
}

.data-table td.empty {
  text-align: center;
  color: #8D6E63;
  padding: 24px;
}

/* Action buttons container */

.lobby-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

/* Difficulty selector */

.difficulty-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.difficulty-label {
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.difficulty-btns {
  display: flex;
  gap: 6px;
  flex: 1;
}

.difficulty-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 6px;
  background: rgba(255, 182, 193, 0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  color: var(--text-secondary);
}

.difficulty-btn:hover {
  background: rgba(255, 182, 193, 0.12);
  transform: translateY(-1px);
}

.difficulty-btn.active {
  border-color: var(--accent-purple);
  background: rgba(206, 147, 216, 0.15);
  color: var(--text-primary);
}

.difficulty-btn .difficulty-name {
  font-size: 14px;
  font-weight: 600;
}

.difficulty-btn .difficulty-score {
  font-size: 11px;
  opacity: 0.6;
}

/* Continue button */

.btn-continue {
  width: 100%;
  padding: 14px 24px;
  background: linear-gradient(135deg, #4DB6AC, #80CBC4);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(77, 182, 172, 0.35);
  transition: opacity 0.2s, transform 0.1s, box-shadow 0.2s;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.btn-continue:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(77, 182, 172, 0.5);
}

.btn-continue:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(77, 182, 172, 0.3);
}

.btn-continue-label {
  font-size: 16px;
  font-weight: 700;
}

.btn-continue-sub {
  font-size: 11px;
  font-weight: 400;
  opacity: 0.75;
}

/* Start button */

.btn-start {
  width: 100%;
  padding: 14px 24px;
  background: linear-gradient(135deg, #FF8A80, #FF6B6B);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.35);
  transition: opacity 0.2s, transform 0.1s, box-shadow 0.2s;
  flex-shrink: 0;
}

.btn-start:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
}

.btn-start:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

/* Secondary button */

.btn-secondary {
  padding: 12px 20px;
  background: rgba(255, 182, 193, 0.1);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-secondary:hover {
  background: rgba(255, 182, 193, 0.2);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* Link button */

.btn-link {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  padding: 2px 4px;
  transition: color 0.2s;
}

.btn-link:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

/* Danger button */

.btn-danger {
  background: none;
  border: none;
  color: var(--accent-red);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 4px;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.btn-danger:hover {
  opacity: 1;
}

/* Lobby footer */

.lobby-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 10px 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: #8D6E63;
  flex-shrink: 0;
}

/* ── Changelog Modal ── */

.changelog-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(93, 64, 55, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.changelog-box {
  background: #FFF5F5;
  border: 1px solid #FFD1DC;
  border-radius: 14px;
  padding: 28px 32px;
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.changelog-title {
  font-size: 20px;
  font-weight: 700;
  color: #5D4037;
  margin-bottom: 20px;
  text-align: center;
}

.changelog-entry {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid #FFD1DC;
}

.changelog-entry:last-of-type {
  border-bottom: none;
}

.changelog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.changelog-ver {
  font-size: 14px;
  font-weight: 700;
  color: #FF6B6B;
}

.changelog-date {
  font-size: 12px;
  color: #8D6E63;
}

.changelog-entry-title {
  font-size: 15px;
  font-weight: 600;
  color: #5D4037;
  margin-bottom: 8px;
}

.changelog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.changelog-list li {
  font-size: 13px;
  color: #8D6E63;
  padding: 3px 0;
  line-height: 1.5;
}

/* ── Game Screen ── */

#screen-game {
  position: relative;
  background: linear-gradient(180deg, #E3F2FD 0%, #E8F5E9 52%, #FFF3E0 100%);
}

#game-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.levelup-overlay {
  position: absolute;
  inset: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.levelup-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(255, 182, 193, 0.15), transparent 28%),
    radial-gradient(circle at 30% 20%, rgba(206, 147, 216, 0.1), transparent 24%);
  pointer-events: none;
}

.levelup-content {
  position: relative;
  max-width: 980px;
  width: 100%;
  padding: 32px 28px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 245, 245, 0.98));
  box-shadow: 0 24px 80px rgba(255, 182, 193, 0.2);
  backdrop-filter: blur(8px);
}

.levelup-title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #FF6B6B;
  margin-bottom: 6px;
}

.levelup-subtitle {
  font-size: 13px;
  color: #8D6E63;
  margin-bottom: 20px;
}

.levelup-hint {
  font-size: 13px;
  color: #8D6E63;
  margin-top: 20px;
}

.levelup-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.levelup-card {
  appearance: none;
  font: inherit;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px 16px 18px;
  cursor: pointer;
  min-height: 220px;
  width: 100%;
  transition: border-color 0.15s, transform 0.15s, background 0.15s, box-shadow 0.15s;
  text-align: left;
  color: var(--text-primary);
}

.levelup-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(255, 182, 193, 0.25);
}

.levelup-card[data-tone="ember"]:hover {
  border-color: rgba(255, 138, 128, 0.8);
}

.levelup-card[data-tone="storm"]:hover {
  border-color: rgba(255, 213, 79, 0.85);
}

.levelup-card[data-tone="azure"]:hover {
  border-color: rgba(100, 181, 246, 0.85);
}

.levelup-card[data-tone="emerald"]:hover {
  border-color: rgba(129, 199, 132, 0.8);
}

.levelup-card[data-tone="gold"]:hover {
  border-color: rgba(255, 213, 79, 0.8);
}

.levelup-card[data-tone="crimson"]:hover {
  border-color: rgba(255, 107, 107, 0.82);
}

.levelup-card[data-tone="void"]:hover {
  border-color: rgba(206, 147, 216, 0.82);
}

.levelup-icon {
  font-size: 34px;
  margin-bottom: 14px;
}

.levelup-name {
  font-size: 17px;
  font-weight: 700;
  color: #5D4037;
  margin-bottom: 8px;
}

.levelup-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 78px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 182, 193, 0.15);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8D6E63;
  margin-bottom: 12px;
}

.levelup-desc {
  font-size: 12px;
  color: #8D6E63;
  line-height: 1.5;
}

.pause-overlay {
  position: absolute;
  inset: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pause-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  background: rgba(255, 245, 245, 0.98);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 40px;
  min-width: 260px;
}

.pause-box .btn-start,
.pause-box .btn-secondary,
.pause-box .btn-link {
  width: 100%;
  text-align: center;
}

.pause-text {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pause-hint {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Game Over Screen ── */

#screen-gameover {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.gameover-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 30%, rgba(255, 182, 193, 0.3) 100%);
  pointer-events: none;
}

.gameover-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 520px;
  padding: 0 24px;
  text-align: center;
}

.gameover-title {
  font-size: 48px;
  font-family: Georgia, serif;
  font-weight: 700;
  color: var(--accent-red);
}

.gameover-survived {
  font-size: 18px;
  color: var(--text-secondary);
}

.gameover-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
}

.gameover-rank {
  font-size: 14px;
  color: var(--text-secondary);
}

.gameover-buttons {
  display: flex;
  flex-direction: row;
  gap: 12px;
  width: 100%;
  justify-content: center;
}

.gameover-buttons .btn-start {
  flex: 1;
  max-width: 200px;
}

.gameover-buttons .btn-secondary {
  flex: 1;
  max-width: 200px;
}

.new-best {
  color: var(--accent-green);
  font-weight: 700;
}

/* ── Mobile / Touch ── */

@media (max-width: 820px) {
  .levelup-content {
    max-width: 560px;
    padding: 24px 18px;
  }

  .levelup-cards {
    grid-template-columns: 1fr;
  }

  .levelup-card {
    min-height: 0;
    text-align: left;
    padding: 16px 14px 14px;
  }

  .gameover-stats {
    grid-template-columns: 1fr;
  }

  .gameover-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .gameover-buttons .btn-start,
  .gameover-buttons .btn-secondary,
  .gameover-buttons .btn-share {
    max-width: none;
  }

  /* Lobby: stack to single column on mobile */
  .lobby-body {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 16px;
    overflow-y: auto;
  }

  .lobby-stats {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-card {
    padding: 10px 12px;
  }

  .stat-value {
    font-size: 20px;
  }

  .lobby-topbar {
    padding: 10px 16px;
  }

  .lobby-footer {
    padding: 8px 16px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .lobby-logo {
    font-size: 16px;
  }

  #lobby-username {
    font-size: 12px;
  }

  .btn-continue,
  .btn-start {
    padding: 16px 20px;
    font-size: 18px;
  }

  .difficulty-btn {
    padding: 10px 6px;
  }

  .login-title {
    font-size: 38px;
  }

  .pause-box {
    padding: 24px 28px;
    min-width: 220px;
  }

  .pause-box .btn-start,
  .pause-box .btn-secondary {
    padding: 16px 20px;
    font-size: 16px;
  }
}

@media (max-width: 420px) {
  .lobby-stats {
    grid-template-columns: 1fr;
  }

  .login-title {
    font-size: 30px;
  }

  .login-content {
    padding: 0 16px;
  }

  .levelup-content {
    padding: 16px 12px;
  }

  .levelup-title {
    font-size: 22px;
  }

  .levelup-card {
    padding: 12px 10px;
  }

  .gameover-title {
    font-size: 32px;
  }

  .gameover-content {
    padding: 0 16px;
    gap: 14px;
  }
}

/* ── Room Section ── */

.room-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.room-btns-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.room-join-row {
  display: flex;
  gap: 8px;
}

.room-btn {
  padding: 10px 16px;
  background: rgba(206, 147, 216, 0.12);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--accent-purple);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.room-btn:hover {
  background: rgba(206, 147, 216, 0.25);
  transform: translateY(-1px);
}

.room-btn:active {
  transform: translateY(0);
}

.room-btn-leave {
  background: rgba(255, 107, 107, 0.08);
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.room-btn-leave:hover {
  background: rgba(255, 107, 107, 0.18);
}

.room-input {
  flex: 1;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.room-input::placeholder {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  letter-spacing: normal;
  font-size: 13px;
  color: var(--text-secondary);
}

.room-input:focus {
  border-color: var(--accent-purple);
}

.room-code-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px;
  background: rgba(206, 147, 216, 0.08);
  border-radius: 8px;
}

.room-code-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.room-code-value {
  font-size: 32px;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--accent-purple);
}

.room-nick-row {
  display: flex;
  gap: 8px;
}

.room-nickname {
  flex: 1;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.room-nickname::placeholder {
  color: var(--text-secondary);
  font-size: 13px;
}

.room-nickname:focus {
  border-color: var(--accent-purple);
}

/* Room Leaderboard */

#room-leaderboard {
  margin-top: 16px;
  padding: 0;
}

/* Challenge Banner */

.challenge-banner {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.15), rgba(255, 213, 79, 0.15));
  border: 1px solid rgba(255, 107, 107, 0.4);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-red);
  text-align: center;
  animation: challengePulse 2s ease-in-out infinite;
}

@keyframes challengePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.2); }
  50% { box-shadow: 0 0 16px 4px rgba(255, 107, 107, 0.15); }
}

/* Share Card Preview */

.share-card-preview {
  width: 100%;
  max-width: 400px;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border);
}

/* Share Button */

.btn-share {
  flex: 1;
  max-width: 200px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #CE93D8, #AB47BC);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(206, 147, 216, 0.35);
  transition: opacity 0.2s, transform 0.1s, box-shadow 0.2s;
}

.btn-share:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(206, 147, 216, 0.5);
}

.btn-share:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(206, 147, 216, 0.3);
}

/* Toast Notification */

.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(93, 64, 55, 0.9);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 2000;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.toast-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Prevent pull-to-refresh and overscroll on touch devices */
@media (pointer: coarse) {
  html, body {
    overscroll-behavior: none;
    -webkit-overflow-scrolling: auto;
  }

  #game-canvas {
    touch-action: none;
  }
}