/* SYNAPSE - Design System v3 — Viral Mechanics Edition */

:root {
  --bg-primary: #060a14;
  --bg-secondary: #0d1220;
  --bg-card: #121828;
  --bg-elevated: #1a2236;
  --surface: #1e2740;
  --border: rgba(100, 160, 255, 0.08);
  --border-bright: rgba(0, 212, 255, 0.2);

  --text-primary: #e8edf5;
  --text-secondary: #8892a8;
  --text-muted: #4a5568;

  --accent-cyan: #00d4ff;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-glow: rgba(0, 212, 255, 0.15);

  --correct: #22c55e;
  --correct-glow: rgba(34, 197, 94, 0.3);
  --present: #eab308;
  --present-glow: rgba(234, 179, 8, 0.3);
  --absent: #334155;
  --absent-text: #64748b;

  --tile-size: 56px;
  --tile-gap: 6px;
  --key-height: 52px;
  --radius: 12px;
  --radius-sm: 8px;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  --transition-fast: 150ms ease;
  --transition-med: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme */
body.light-theme {
  --bg-primary: #e3f2fd;
  --bg-secondary: #bbdefb;
  --bg-card: #f0f8ff;
  --bg-elevated: #e8f4fd;
  --surface: #d4eaf7;
  --border: rgba(0, 0, 0, 0.08);
  --border-bright: rgba(100, 100, 200, 0.2);
  --text-primary: #1a1a2e;
  --text-secondary: #555;
  --text-muted: #999;
  --accent-glow: rgba(100, 100, 200, 0.1);
  --absent: #b8d4e8;
  --absent-text: #6a8da8;
}

body.light-theme #neural-bg {
  opacity: 0.4;
}

/* Expert mode */
body.expert-mode {
  --accent-cyan: #ff6b35;
  --accent-purple: #ff2d2d;
  --accent-glow: rgba(255, 107, 53, 0.15);
  --border-bright: rgba(255, 107, 53, 0.25);
}

body.expert-mode #logo {
  background: linear-gradient(135deg, #ff6b35, #ff2d2d);
  -webkit-background-clip: text;
  background-clip: text;
}

body.expert-mode .day-badge {
  color: #ff6b35;
  background: rgba(255, 107, 53, 0.1);
  border-color: rgba(255, 107, 53, 0.3);
}

body.expert-mode .progress-connector.lit {
  background: linear-gradient(90deg, #ff6b35, #ff2d2d);
  box-shadow: 0 0 8px rgba(255, 107, 53, 0.3);
}

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

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100dvh;
  position: relative;
  overflow: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

#neural-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Header */
#header {
  width: 100%;
  max-width: 560px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 10;
  flex-shrink: 0;
}

.header-left,
.header-right {
  display: flex;
  gap: 2px;
}

.header-right {
  justify-content: flex-end;
}

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

#logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.day-badge {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 2px 6px;
  border-radius: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
  font-size: 1rem;
}

.icon-btn:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.icon-btn:active {
  transform: scale(0.9);
}

.mode-toggle {
  opacity: 0.5;
}

.mode-toggle.active {
  opacity: 1;
  background: rgba(255, 107, 53, 0.15);
}

.mode-icon,
.sound-icon {
  font-size: 1.1rem;
  line-height: 1;
}

/* Progress bar */
.progress-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 10px 16px 6px;
  position: relative;
  z-index: 10;
  flex-shrink: 0;
}

.progress-pip {
  font-size: 1.1rem;
  opacity: 0.25;
  transition: all var(--transition-med);
  filter: grayscale(1);
}

.progress-pip.active {
  opacity: 1;
  filter: grayscale(0);
  transform: scale(1.2);
}

.progress-pip.solved {
  opacity: 1;
  filter: grayscale(0);
  animation: brainPop 0.5s cubic-bezier(0.36, 1.5, 0.5, 1);
}

.progress-pip.failed {
  opacity: 0.6;
  filter: grayscale(0.5) brightness(0.7);
}

.progress-connector {
  width: 20px;
  height: 2px;
  background: var(--border);
  margin: 0 2px;
  border-radius: 1px;
  transition: background var(--transition-med);
}

.progress-connector.lit {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  box-shadow: 0 0 8px var(--accent-glow);
}

@keyframes brainPop {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.6);
  }

  100% {
    transform: scale(1.2);
  }
}

/* Combo indicator */
.combo-indicator {
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  padding: 2px 12px;
  position: relative;
  z-index: 10;
  animation: comboFlash 0.6s ease;
}

.combo-indicator.hidden {
  display: none;
}

@keyframes comboFlash {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }

  50% {
    transform: scale(1.3);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Game area */
#game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 420px;
  padding: 4px 16px;
  position: relative;
  z-index: 10;
  gap: 6px;
  min-height: 0;
}

.word-display {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.clue-word {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 5px;
  color: var(--text-primary);
  text-shadow: 0 0 30px var(--accent-glow);
  padding: 2px 12px;
  animation: wordGlow 4s ease-in-out infinite alternate;
}

@keyframes wordGlow {
  0% {
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
  }

  100% {
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.2);
  }
}

.neural-line {
  width: 2px;
  height: 16px;
  background: linear-gradient(to bottom, transparent, var(--accent-cyan), transparent);
  opacity: 0.4;
  animation: neuralPulse 2s ease-in-out infinite;
}

@keyframes neuralPulse {

  0%,
  100% {
    opacity: 0.2;
  }

  50% {
    opacity: 0.6;
  }
}

/* Hint button */
.hint-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  color: var(--accent-cyan);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hint-btn:hover:not(:disabled) {
  background: var(--surface);
  transform: scale(1.05);
}

.hint-btn:disabled,
.hint-btn.used {
  opacity: 0.3;
  cursor: not-allowed;
}

body.expert-mode .hint-btn {
  display: none;
}

/* Guess grid */
.guess-grid {
  display: flex;
  flex-direction: column;
  gap: var(--tile-gap);
  padding: 2px 0;
}

.guess-row {
  display: flex;
  gap: var(--tile-gap);
  justify-content: center;
}

.tile {
  width: var(--tile-size);
  height: var(--tile-size);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 2px solid var(--border-bright);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.tile.filled {
  border-color: var(--text-secondary);
  animation: tilePop 0.1s ease;
}

.tile.active-row {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.1);
}

@keyframes tilePop {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.08);
  }

  100% {
    transform: scale(1);
  }
}

.tile.flip {
  animation: tileFlip 0.5s ease forwards;
}

@keyframes tileFlip {
  0% {
    transform: rotateX(0deg);
  }

  50% {
    transform: rotateX(90deg);
  }

  100% {
    transform: rotateX(0deg);
  }
}

.tile.correct {
  background: var(--correct);
  border-color: var(--correct);
  color: white;
  box-shadow: 0 0 20px var(--correct-glow);
}

.tile.present {
  background: var(--present);
  border-color: var(--present);
  color: white;
  box-shadow: 0 0 20px var(--present-glow);
}

.tile.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: var(--absent-text);
}

.guess-row.shake {
  animation: rowShake 0.4s ease;
}

@keyframes rowShake {

  0%,
  100% {
    transform: translateX(0);
  }

  20% {
    transform: translateX(-8px);
  }

  40% {
    transform: translateX(8px);
  }

  60% {
    transform: translateX(-6px);
  }

  80% {
    transform: translateX(6px);
  }
}

.tile.bounce {
  animation: tileBounce 0.5s ease;
}

@keyframes tileBounce {
  0% {
    transform: translateY(0);
  }

  30% {
    transform: translateY(-20px);
  }

  60% {
    transform: translateY(4px);
  }

  100% {
    transform: translateY(0);
  }
}

/* Compound reveal */
.compound-reveal {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--border-bright);
  animation: revealSlide 0.5s ease;
}

.compound-reveal.hidden {
  display: none;
}

.compound-word {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 1px;
}

.compound-plus {
  color: var(--text-muted);
  font-size: 0.75rem;
}

@keyframes revealSlide {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Keyboard */
.keyboard {
  width: 100%;
  max-width: 520px;
  padding: 6px 4px 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  position: relative;
  z-index: 10;
  flex-shrink: 0;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 4px;
}

.key {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  height: var(--key-height);
  min-width: 30px;
  flex: 1;
  max-width: 42px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow: hidden;
}

.key::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}

.key:active::after {
  opacity: 1;
}

.key:hover {
  background: var(--surface);
}

.key:active {
  transform: scale(0.94);
  background: var(--surface);
}

.key-wide {
  flex: 1.5;
  max-width: 68px;
  font-size: 0.65rem;
  letter-spacing: 1px;
}

.spacer-half {
  flex: 0.5;
  max-width: 16px;
}

.key.correct {
  background: var(--correct);
  color: white;
}

.key.present {
  background: var(--present);
  color: white;
}

.key.absent {
  background: #1a1a2e;
  color: var(--text-muted);
}

body.light-theme .key.absent {
  background: #c0c0c0;
  color: #666;
}

/* Toast */
.toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 30px;
  z-index: 1000;
  pointer-events: none;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 1.2s forwards;
  white-space: nowrap;
}

.toast.hidden {
  display: none;
}

.toast.combo-toast {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: white;
  font-size: 1rem;
  animation: toastIn 0.3s ease, comboScale 0.5s ease 0.3s, toastOut 0.3s ease 1.5s forwards;
}

@keyframes toastIn {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
  }

  100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes toastOut {
  0% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

@keyframes comboScale {
  0% {
    transform: translateX(-50%) scale(1);
  }

  50% {
    transform: translateX(-50%) scale(1.2);
  }

  100% {
    transform: translateX(-50%) scale(1);
  }
}

/* Celebration particles */
.celebration-particle {
  position: fixed;
  top: -30px;
  font-size: 1.5rem;
  z-index: 999;
  pointer-events: none;
  animation: particleFall linear forwards;
}

@keyframes particleFall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }

  100% {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0;
  }
}

/* Confetti particles */
.confetti-particle {
  position: fixed;
  top: -10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  z-index: 999;
  pointer-events: none;
  animation: confettiFall linear forwards;
}

@keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg) scale(1);
    opacity: 1;
  }

  70% {
    opacity: 1;
  }

  100% {
    transform: translateY(110vh) rotate(1080deg) scale(0.5);
    opacity: 0;
  }
}

/* Level-up toast */
.level-up-toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border: 2px solid var(--accent-cyan);
  border-radius: 20px;
  padding: 20px 32px;
  z-index: 2000;
  opacity: 0;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 60px var(--accent-glow), 0 0 120px rgba(0, 212, 255, 0.1);
}

.level-up-toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.level-up-icon {
  font-size: 3rem;
  animation: levelUpBounce 0.8s ease 0.3s;
}

@keyframes levelUpBounce {
  0% {
    transform: scale(1);
  }

  30% {
    transform: scale(1.4);
  }

  60% {
    transform: scale(0.9);
  }

  100% {
    transform: scale(1);
  }
}

.level-up-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.level-up-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Achievement toast */
.achievement-toast {
  position: fixed;
  top: 20px;
  right: -300px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius);
  padding: 12px 20px;
  z-index: 2000;
  box-shadow: 0 0 30px var(--accent-glow), 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.achievement-toast.show {
  right: 20px;
}

.achievement-toast-icon {
  font-size: 2rem;
}

.achievement-toast-title {
  font-size: 0.65rem;
  color: var(--accent-cyan);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.achievement-toast-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 10, 20, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.2s ease;
  padding: 16px;
}

.modal-overlay.hidden {
  display: none;
}

body.light-theme .modal-overlay {
  background: rgba(255, 255, 255, 0.8);
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: 16px;
  padding: 28px;
  max-width: 420px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlide 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.05), 0 20px 60px rgba(0, 0, 0, 0.5);
}

body.light-theme .modal {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

@keyframes modalSlide {
  0% {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }

  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 16px 0 10px;
  text-align: center;
}

.modal-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Tutorial */
.tutorial-example {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin: 16px 0;
  padding: 16px;
  background: var(--bg-primary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.tutorial-clue {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-primary);
}

.tutorial-answer {
  display: flex;
  gap: 4px;
  margin: 8px 0;
}

.tutorial-tile {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 6px;
  color: white;
}

.tutorial-tile.correct {
  background: var(--correct);
}

.tutorial-explain {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.tutorial-rules {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rule {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.rule-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* XP Section */
.xp-section {
  margin: 12px 0;
  padding: 12px 16px;
  background: var(--bg-primary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.rank-display {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.rank-icon {
  font-size: 1.4rem;
}

.rank-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
}

.shield-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.xp-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--surface);
  border-radius: 4px;
  overflow: hidden;
}

.xp-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 2px;
}

.xp-label {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-display);
  font-weight: 600;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 4px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-number.on-fire::after {
  content: ' 🔥';
  font-size: 0.9rem;
}

.stat-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.stats-username {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--accent-cyan);
}

.og-badge {
  font-size: 0.65rem;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #000;
  padding: 1px 6px;
  border-radius: 8px;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 4px;
}

.expert-badge {
  font-size: 0.65rem;
  background: linear-gradient(135deg, #ff6b35, #ff2d2d);
  color: white;
  padding: 1px 6px;
  border-radius: 8px;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 4px;
}

/* Distribution */
.distribution {
  margin: 8px 0;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.dist-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  width: 16px;
  text-align: right;
  color: var(--text-secondary);
}

.dist-bar-wrap {
  flex: 1;
}

.dist-bar {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  min-width: 24px;
  text-align: right;
}

/* Buttons */
.share-button {
  display: block;
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.share-button:hover {
  transform: scale(1.02);
  opacity: 0.95;
}

.share-button.hidden {
  display: none;
}

.challenge-button {
  display: block;
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.challenge-button:hover {
  transform: scale(1.02);
}

.speed-round-btn {
  display: block;
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #ff6b35, #ff2d2d);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: all var(--transition-fast);
}

.speed-round-btn:hover {
  transform: scale(1.02);
}

/* Social share row */
.social-share-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.social-icons-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}

.social-icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-bright);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-icon-btn:hover {
  transform: scale(1.1);
  background: var(--surface);
}

.social-icon-btn.whatsapp-btn {
  color: #25D366;
}

.social-icon-btn.whatsapp-btn:hover {
  background: rgba(37, 211, 102, 0.1);
  border-color: #25D366;
}

/* Premium results */
.results-score {
  text-align: center;
  margin: 12px 0;
}

.results-rank-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
  animation: rankBadgeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes rankBadgeIn {
  0% {
    transform: scale(0);
    opacity: 0;
  }

  60% {
    transform: scale(1.2);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.results-rank-icon {
  font-size: 2rem;
}

.results-rank-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.results-big-score {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.results-xp-gained {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--correct);
  animation: xpGainedPop 0.5s ease;
  margin-top: 4px;
}

@keyframes xpGainedPop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }

  60% {
    transform: scale(1.2);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.results-combo {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-top: 2px;
}

.results-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 12px 0;
}

.results-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color 0.3s;
}

.results-row.results-solved {
  border-left: 3px solid var(--correct);
}

.results-row.results-failed {
  border-left: 3px solid #ef4444;
  opacity: 0.7;
}

.results-puzzle {
  display: flex;
  flex-direction: column;
}

.results-compound {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.results-answer {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  letter-spacing: 2px;
}

.results-emoji {
  font-size: 0.85rem;
  text-align: right;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.results-xp {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--correct);
  font-family: var(--font-display);
}

.next-timer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Speed round */
.speed-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 15;
  pointer-events: none;
}

.speed-overlay.hidden {
  display: none;
}

.speed-hud {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 50px 20px 10px;
}

.speed-timer-wrap,
.speed-score-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.speed-label {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.speed-timer {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-cyan);
  transition: color 0.3s;
}

.speed-timer.urgent {
  color: #ff2d2d;
  animation: timerPulse 0.5s ease-in-out infinite;
}

@keyframes timerPulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

.speed-score {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--correct);
}

/* Achievements */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.achievement-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14px 8px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  text-align: center;
  transition: all var(--transition-fast);
}

.achievement-card.unlocked {
  border-color: var(--accent-cyan);
  background: var(--bg-elevated);
}

.achievement-card.locked {
  opacity: 0.5;
}

.achievement-icon {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.achievement-name {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.achievement-desc {
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* Leaderboard */
.lb-tabs {
  display: flex;
  gap: 4px;
  margin: 12px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-primary);
  padding: 3px;
}

.lb-tab {
  flex: 1;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.lb-tab.active {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.lb-content {
  min-height: 100px;
}

.lb-loading,
.lb-empty {
  text-align: center;
  padding: 30px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.lb-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lb-entry {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  border: 1px solid transparent;
}

.lb-entry.lb-me {
  border-color: var(--accent-cyan);
  background: var(--bg-elevated);
}

.lb-rank {
  font-size: 1rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.lb-name {
  flex: 1;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-primary);
}

.lb-result {
  font-size: 0.9rem;
}

.lb-score,
.lb-stat {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: right;
  min-width: 36px;
}

/* Username modal */
.username-modal {
  text-align: center;
}

.username-input-wrap {
  position: relative;
  margin: 12px 0;
}

.username-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 2px solid var(--border-bright);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  letter-spacing: 2px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.username-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-glow);
}

.username-char-count {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.username-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.username-submit {
  margin-top: 8px;
}

.username-submit:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.username-skip {
  display: block;
  margin: 8px auto 0;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 6px;
}

.username-skip:hover {
  color: var(--text-secondary);
}

.set-username-link {
  background: none;
  border: none;
  color: var(--accent-cyan);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px 8px;
}

/* Google Sign-In Button */
.google-signin-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  margin: 8px 0;
  background: #fff;
  border: 1px solid #dadce0;
  border-radius: 8px;
  color: #3c4043;
  font-family: 'Roboto', 'Inter', var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.google-signin-btn:hover {
  background: #f7f8f8;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.google-signin-btn:active {
  background: #eef0f1;
}

.google-signin-btn svg {
  flex-shrink: 0;
}

.signin-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0 10px;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.signin-divider::before,
.signin-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* User Badge photo */
.user-badge-photo {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
}

/* Logout */
.logout-btn {
  display: block;
  width: 100%;
  padding: 10px;
  margin-top: 12px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.logout-btn:hover {
  color: #ef4444;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.05);
}

/* In-Game User Badge */
.user-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin: 4px auto 2px;
  position: relative;
}

.user-badge-name {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  opacity: 0.8;
}

.user-badge-arrow {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  padding: 0 4px;
  transition: color var(--transition-fast);
}

.user-badge-arrow:hover {
  color: var(--accent-cyan);
}

.user-badge-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 0;
  z-index: 100;
  min-width: 160px;
  box-shadow: var(--shadow-lg);
}

.user-menu-item {
  display: block;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-menu-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.user-menu-logout:hover {
  color: #ef4444;
}

/* Responsive */
@media (max-height: 700px) {
  :root {
    --tile-size: 48px;
    --key-height: 46px;
  }

  .clue-word {
    font-size: 1.4rem;
  }

  .neural-line {
    height: 10px;
  }

  #header {
    padding: 6px 10px;
  }

  .progress-bar {
    padding: 6px 16px 4px;
  }

  .keyboard {
    padding: 4px 4px 6px;
  }
}

@media (max-height: 600px) {
  :root {
    --tile-size: 42px;
    --key-height: 42px;
  }

  .clue-word {
    font-size: 1.2rem;
    letter-spacing: 3px;
  }

  .neural-line {
    height: 6px;
  }

  .hint-btn {
    padding: 4px 12px;
    font-size: 0.7rem;
  }
}

@media (max-width: 380px) {
  :root {
    --tile-size: 44px;
    --key-height: 46px;
  }

  .key {
    min-width: 26px;
    font-size: 0.75rem;
  }

  .key-wide {
    max-width: 60px;
  }

  #logo {
    font-size: 1.2rem;
    letter-spacing: 3px;
  }
}

@supports (padding: env(safe-area-inset-top)) {
  #header {
    padding-top: max(8px, env(safe-area-inset-top));
  }

  .keyboard {
    padding-bottom: max(10px, env(safe-area-inset-bottom));
  }
}

@media (orientation: landscape) and (max-height: 500px) {
  :root {
    --tile-size: 36px;
    --key-height: 38px;
  }

  .progress-bar {
    padding: 2px 16px;
  }

  .neural-line {
    display: none;
  }

  #game-area {
    gap: 2px;
    padding: 2px 16px;
  }
}