/* ============================================
   BODMAS BATTLE - Neobrutalist Game UI Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

/* --- Design Tokens --- */
:root {
  --yellow: #FFE156;
  --yellow-dark: #E6C800;
  --black: #1A1A1A;
  --red: #FF3B3B;
  --red-dark: #CC2E2E;
  --blue: #3B82F6;
  --blue-dark: #2563EB;
  --green: #22C55E;
  --green-dark: #16A34A;
  --orange: #FF9F43;
  --purple: #A855F7;
  --pink: #F472B6;
  --white: #FAFAFA;
  --gray: #E5E5E5;
  --gray-dark: #A3A3A3;
  --shadow: 5px 5px 0px var(--black);
  --shadow-lg: 8px 8px 0px var(--black);
  --shadow-sm: 3px 3px 0px var(--black);
  --border: 3px solid var(--black);
  --border-thick: 5px solid var(--black);
  --radius: 0px;
  --font-main: 'Space Grotesk', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --transition: all 0.15s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--yellow);
  color: var(--black);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle, var(--black) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* --- Utility Classes --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hidden { display: none !important; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-col { flex-direction: column; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }
.text-center { text-align: center; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.title-xl {
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1;
  text-shadow: 4px 4px 0 var(--red);
}

.title-lg {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  text-shadow: 3px 3px 0 var(--blue);
}

.title-md {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2;
}

.subtitle {
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-weight: 500;
  opacity: 0.9;
}

/* --- Buttons --- */
.btn {
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 16px 32px;
  border: var(--border-thick);
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  user-select: none;
}

.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0px var(--black);
}

.btn:active {
  transform: translate(5px, 5px);
  box-shadow: 0px 0px 0px var(--black);
}

.btn-lg {
  font-size: 1.3rem;
  padding: 20px 40px;
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  font-size: 0.85rem;
  padding: 10px 20px;
  box-shadow: var(--shadow-sm);
}

.btn-yellow { background: var(--yellow); }
.btn-red { background: var(--red); color: var(--white); }
.btn-blue { background: var(--blue); color: var(--white); }
.btn-green { background: var(--green); color: var(--white); }
.btn-orange { background: var(--orange); }
.btn-purple { background: var(--purple); color: var(--white); }
.btn-black { background: var(--black); color: var(--yellow); }

.btn-icon {
  font-size: 1.4em;
  line-height: 1;
}

/* --- Cards --- */
.card {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

.card:hover {
  transform: translate(2px, 2px);
  box-shadow: 5px 5px 0px var(--black);
}

.card-colored {
  border: var(--border-thick);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

/* --- Input Fields --- */
.input {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  padding: 14px 20px;
  border: var(--border-thick);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  outline: none;
  transition: var(--transition);
  width: 100%;
}

.input:focus {
  box-shadow: var(--shadow);
  transform: translate(-2px, -2px);
}

.input::placeholder {
  color: var(--gray-dark);
  font-weight: 400;
}

/* --- Modal / Overlay --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease;
}

.modal-content {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: 12px 12px 0px var(--black);
  padding: 40px;
  max-width: 600px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.3s ease;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border: var(--border);
  background: var(--red);
  color: var(--white);
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--black);
  color: var(--red);
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-12px); }
  60% { transform: translateY(-6px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes confetti-fall {
  0% { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.anim-shake { animation: shake 0.5s ease; }
.anim-pop { animation: pop 0.3s ease; }
.anim-bounce { animation: bounce 0.6s ease; }
.anim-pulse { animation: pulse 1.5s ease infinite; }
.anim-float { animation: float 3s ease-in-out infinite; }

/* --- Badge / Tag --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border: 3px solid var(--black);
  box-shadow: var(--shadow-sm);
}

.badge-yellow { background: var(--yellow); }
.badge-red { background: var(--red); color: var(--white); }
.badge-blue { background: var(--blue); color: var(--white); }
.badge-green { background: var(--green); color: var(--white); }

/* --- Progress Bar --- */
.progress-bar {
  width: 100%;
  height: 28px;
  border: var(--border);
  background: var(--gray);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--green);
  transition: width 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--white);
}

/* --- Notification / Toast --- */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 16px 24px;
  border: var(--border-thick);
  box-shadow: var(--shadow);
  font-weight: 700;
  font-size: 1rem;
  z-index: 2000;
  animation: slideDown 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-success { background: var(--green); color: var(--white); }
.toast-error { background: var(--red); color: var(--white); }
.toast-info { background: var(--blue); color: var(--white); }

/* ============================================
   MAIN MENU / LANDING PAGE
   ============================================ */

#main-menu {
  min-height: 100vh;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.menu-header {
  text-align: center;
  margin-bottom: 20px;
}

.menu-header .title-xl {
  margin-bottom: 12px;
}

.menu-tagline {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  font-weight: 600;
  background: var(--black);
  color: var(--yellow);
  display: inline-block;
  padding: 8px 24px;
  border: var(--border);
  transform: rotate(-1deg);
}

/* Player name input */
.player-section {
  margin: 24px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.player-section .input {
  max-width: 280px;
  text-align: center;
  font-size: 1rem;
}

.player-section label {
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
}

/* Game mode cards */
.game-modes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  width: 100%;
  max-width: 1100px;
  margin: 16px 0 32px;
}

.mode-card {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-lg);
  padding: 0;
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}

.mode-card:hover {
  transform: translate(3px, 3px);
  box-shadow: 5px 5px 0px var(--black);
}

.mode-card:active {
  transform: translate(8px, 8px);
  box-shadow: 0 0 0 var(--black);
}

.mode-card-header {
  padding: 20px 24px;
  border-bottom: var(--border-thick);
  display: flex;
  align-items: center;
  gap: 14px;
}

.mode-card-header .mode-icon {
  font-size: 2.5rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--border);
  flex-shrink: 0;
}

.mode-card-header h3 {
  font-size: 1.3rem;
  line-height: 1.2;
}

.mode-card-body {
  padding: 20px 24px;
}

.mode-card-body p {
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 16px;
}

.mode-card-body .badge {
  margin-right: 8px;
  margin-bottom: 8px;
}

.mode-card-footer {
  padding: 16px 24px;
  border-top: var(--border-thick);
  display: flex;
  justify-content: flex-end;
}

/* Card color themes */
.mode-card[data-mode="busjam"] .mode-card-header { background: var(--red); color: var(--white); }
.mode-card[data-mode="busjam"] .mode-icon { background: var(--white); }
.mode-card[data-mode="solve"] .mode-card-header { background: var(--blue); color: var(--white); }
.mode-card[data-mode="solve"] .mode-icon { background: var(--white); }
.mode-card[data-mode="arrange"] .mode-card-header { background: var(--purple); color: var(--white); }
.mode-card[data-mode="arrange"] .mode-icon { background: var(--white); }

/* Bottom menu buttons */
.menu-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

/* ============================================
   GAME SCREEN (shared layout)
   ============================================ */

.game-screen {
  min-height: 100vh;
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.game-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 20px;
  background: var(--black);
  color: var(--yellow);
  border: var(--border-thick);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.game-topbar .game-title {
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
}

.game-stats {
  display: flex;
  gap: 20px;
  align-items: center;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1rem;
}

.stat-item .stat-icon {
  font-size: 1.3em;
}

.stat-item .stat-value {
  font-family: var(--font-mono);
  background: var(--yellow);
  color: var(--black);
  padding: 4px 12px;
  border: 2px solid var(--yellow);
  font-size: 1.1rem;
}

.game-topbar-actions {
  display: flex;
  gap: 8px;
}

/* Level info */
.level-banner {
  text-align: center;
  padding: 16px;
  margin-bottom: 20px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.level-banner h2 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.level-banner .expression-display {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 700;
  padding: 12px;
  letter-spacing: 0.1em;
}

/* Game area */
.game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 20px 0;
}

/* ============================================
   GAME MODE 1: BUS JAM STYLE
   ============================================ */

.busjam-container {
  width: 100%;
  max-width: 800px;
}

.busjam-instruction {
  text-align: center;
  padding: 16px 24px;
  background: var(--blue);
  color: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.busjam-blocks {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  padding: 24px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
  min-height: 120px;
}

.busjam-block {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  padding: 16px 24px;
  border: var(--border-thick);
  cursor: grab;
  transition: var(--transition);
  user-select: none;
  min-width: 70px;
  text-align: center;
}

.busjam-block:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow);
}

.busjam-block:active {
  cursor: grabbing;
}

.busjam-block.number {
  background: var(--yellow);
  box-shadow: var(--shadow-sm);
}

.busjam-block.operator {
  background: var(--red);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.busjam-block.bracket {
  background: var(--purple);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.busjam-block.selected {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 var(--black);
  outline: 4px solid var(--green);
}

.busjam-block.correct {
  background: var(--green) !important;
  color: var(--white) !important;
  animation: pop 0.3s ease;
}

.busjam-block.wrong {
  animation: shake 0.5s ease;
  background: var(--red) !important;
  color: var(--white) !important;
}

.busjam-block.used {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* Steps / Solution area */
.busjam-steps {
  margin-top: 20px;
  padding: 24px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.busjam-steps h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-item {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  padding: 10px 16px;
  margin-bottom: 8px;
  border: var(--border);
  background: var(--gray);
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-item.completed {
  background: var(--green);
  color: var(--white);
}

.step-item .step-num {
  background: var(--black);
  color: var(--yellow);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-item.active {
  background: var(--yellow);
  font-weight: 700;
  border-width: 4px;
}

/* Drop zones for drag and drop */
.drop-zone {
  min-height: 80px;
  padding: 16px;
  border: 4px dashed var(--black);
  background: var(--gray);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  transition: var(--transition);
}

.drop-zone.drag-over {
  background: var(--yellow);
  border-style: solid;
}

.drop-zone-label {
  font-weight: 700;
  font-size: 1rem;
  opacity: 0.5;
  text-transform: uppercase;
}

/* ============================================
   GAME MODE 2: SOLVE EXPRESSION
   ============================================ */

.solve-container {
  width: 100%;
  max-width: 700px;
}

.solve-expression-box {
  text-align: center;
  padding: 32px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-lg);
  margin-bottom: 24px;
}

.solve-expression-box .expression {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.solve-expression-box .expression .highlight {
  background: var(--yellow);
  padding: 2px 8px;
  border: 3px solid var(--black);
}

.solve-input-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.solve-input-area .input {
  font-size: 1.5rem;
  text-align: center;
  flex: 1;
}

.solve-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Hint panel */
.hint-panel {
  margin-top: 20px;
  padding: 24px;
  background: var(--orange);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.hint-panel h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hint-step {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 10px 16px;
  margin-bottom: 8px;
  background: var(--white);
  border: var(--border);
}

.hint-step .hint-label {
  font-family: var(--font-main);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--red);
  display: block;
  margin-bottom: 4px;
}

/* Feedback messages */
.feedback {
  text-align: center;
  padding: 16px 24px;
  border: var(--border-thick);
  font-weight: 700;
  font-size: 1.2rem;
  margin-top: 16px;
  box-shadow: var(--shadow);
}

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

.feedback.wrong {
  background: var(--red);
  color: var(--white);
}

/* ============================================
   GAME MODE 3: ARRANGE TO MATCH
   ============================================ */

.arrange-container {
  width: 100%;
  max-width: 800px;
}

.arrange-target {
  text-align: center;
  padding: 24px;
  background: var(--green);
  color: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.arrange-target h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.arrange-target .target-value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
}

.arrange-workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arrange-available {
  padding: 24px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.arrange-available h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.arrange-pieces {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.arrange-piece {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 14px 22px;
  border: var(--border-thick);
  cursor: grab;
  transition: var(--transition);
  user-select: none;
  min-width: 60px;
  text-align: center;
}

.arrange-piece:active { cursor: grabbing; }

.arrange-piece.number { background: var(--yellow); box-shadow: var(--shadow-sm); }
.arrange-piece.operator { background: var(--red); color: var(--white); box-shadow: var(--shadow-sm); }
.arrange-piece.bracket { background: var(--purple); color: var(--white); box-shadow: var(--shadow-sm); }

.arrange-piece.placed {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.arrange-builder {
  padding: 24px;
  background: var(--gray);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.arrange-builder h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.arrange-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  min-height: 70px;
  padding: 16px;
  border: 4px dashed var(--black);
  background: var(--white);
}

.arrange-slot {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 14px 22px;
  border: var(--border-thick);
  min-width: 60px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.arrange-slot:hover {
  background: var(--red);
  color: var(--white);
}

.arrange-result {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  text-align: center;
  padding: 12px;
  margin-top: 12px;
  border: var(--border);
  background: var(--white);
  font-weight: 700;
}

.arrange-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ============================================
   LEADERBOARD
   ============================================ */

.leaderboard-screen {
  min-height: 100vh;
  padding: 40px 20px;
}

.leaderboard-header {
  text-align: center;
  margin-bottom: 28px;
}

.leaderboard-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border: var(--border-thick);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.leaderboard-tab {
  flex: 1;
  padding: 14px 20px;
  background: var(--white);
  border: none;
  border-right: var(--border-thick);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
}

.leaderboard-tab:last-child { border-right: none; }

.leaderboard-tab.active {
  background: var(--black);
  color: var(--yellow);
}

.leaderboard-tab:hover:not(.active) {
  background: var(--gray);
}

.leaderboard-table-wrapper {
  overflow-x: auto;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  border: var(--border-thick);
  box-shadow: var(--shadow);
  background: var(--white);
}

.leaderboard-table th {
  background: var(--black);
  color: var(--yellow);
  padding: 14px 16px;
  text-align: left;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: var(--border-thick);
}

.leaderboard-table td {
  padding: 12px 16px;
  border-bottom: 2px solid var(--black);
  font-weight: 600;
}

.leaderboard-table tr:nth-child(even) td {
  background: var(--gray);
}

.leaderboard-table tr:hover td {
  background: var(--yellow);
}

.leaderboard-table .rank-1 td { background: var(--yellow) !important; }
.leaderboard-table .rank-2 td { background: #E5E5E5 !important; }
.leaderboard-table .rank-3 td { background: var(--orange) !important; }

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

.leaderboard-empty {
  text-align: center;
  padding: 48px 24px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow);
}

.leaderboard-empty p {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 12px;
}

.leaderboard-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ============================================
   CONFETTI OVERLAY
   ============================================ */

.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3000;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  width: 12px;
  height: 12px;
  top: -20px;
  animation: confetti-fall linear forwards;
}

/* ============================================
   LEVEL COMPLETE SCREEN
   ============================================ */

.level-complete {
  text-align: center;
  padding: 40px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 100%;
}

.level-complete h2 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.level-complete .score-display {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--green);
  margin: 16px 0;
}

.level-complete .score-breakdown {
  text-align: left;
  margin: 16px 0;
  padding: 16px;
  background: var(--gray);
  border: var(--border);
}

.level-complete .score-breakdown p {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-weight: 600;
  border-bottom: 2px solid var(--black);
}

.level-complete .score-breakdown p:last-child {
  border-bottom: none;
  font-size: 1.1rem;
}

.level-complete-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* ============================================
   TIMER
   ============================================ */

.timer-display {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}

.timer-display.warning {
  color: var(--red);
  animation: pulse 0.5s ease infinite;
}

/* ============================================
   DIFFICULTY SELECTOR
   ============================================ */

.difficulty-selector {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.difficulty-btn {
  padding: 10px 24px;
  border: var(--border-thick);
  background: var(--white);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.difficulty-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--black);
}

.difficulty-btn.active {
  background: var(--black);
  color: var(--yellow);
}

.difficulty-btn[data-diff="easy"] { border-color: var(--green); }
.difficulty-btn[data-diff="medium"] { border-color: var(--orange); }
.difficulty-btn[data-diff="hard"] { border-color: var(--red); }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .game-modes {
    grid-template-columns: 1fr;
  }
  
  .game-topbar {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .game-stats {
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .solve-input-area {
    flex-direction: column;
  }
  
  .leaderboard-tabs {
    flex-direction: column;
  }
  
  .leaderboard-tab {
    border-right: none;
    border-bottom: var(--border-thick);
  }
  
  .leaderboard-tab:last-child { border-bottom: none; }
  
  .busjam-block, .arrange-piece, .arrange-slot {
    font-size: 1.2rem;
    padding: 12px 16px;
    min-width: 50px;
  }
  
  .modal-content {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .title-xl {
    font-size: 2.5rem;
  }
  
  .menu-tagline {
    font-size: 0.9rem;
  }
  
  .btn-lg {
    font-size: 1rem;
    padding: 14px 28px;
  }
  
  .mode-card-header h3 {
    font-size: 1.1rem;
  }
}

/* ============================================
   BODMAS PRELOADER & KEYBOARD (NEO-BRUTALIST)
   ============================================ */

.preloader {
  position: fixed;
  inset: 0;
  background-color: var(--black);
  background-image: 
    radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.5s ease-out, visibility 0.5s;
}

.preloader.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  width: 90%;
  max-width: 600px;
  text-align: center;
  position: relative;
}

.loader-top {
  margin-bottom: 40px;
  position: relative;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-symbols {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.floating-symbols span {
  position: absolute;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  opacity: 0.15;
  filter: blur(1px);
  animation: symbolFloat 4s ease-in-out infinite;
}

.floating-symbols span:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; color: var(--red); }
.floating-symbols span:nth-child(2) { top: 20%; right: 15%; animation-delay: 0.5s; color: var(--blue); }
.floating-symbols span:nth-child(3) { bottom: 15%; left: 20%; animation-delay: 1s; color: var(--green); }
.floating-symbols span:nth-child(4) { bottom: 25%; right: 10%; animation-delay: 1.5s; color: var(--yellow); }
.floating-symbols span:nth-child(5) { top: 50%; left: 5%; animation-delay: 2s; color: var(--purple); }
.floating-symbols span:nth-child(6) { top: 40%; right: 5%; animation-delay: 2.5s; color: var(--pink); }

@keyframes symbolFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(10deg); }
}

.solving-animation {
  width: 100%;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: 10px 10px 0 var(--yellow);
  padding: 30px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.expression-step {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--black);
  letter-spacing: 0.05em;
}

.expression-step .op-highlight {
  color: var(--red);
  background: rgba(255, 59, 59, 0.1);
  padding: 0 5px;
  border: 2px solid var(--black);
  box-shadow: 3px 3px 0 var(--black);
  animation: opPulse 0.5s infinite alternate;
}

@keyframes opPulse {
  from { transform: scale(1); box-shadow: 2px 2px 0 var(--black); }
  to { transform: scale(1.05); box-shadow: 5px 5px 0 var(--black); }
}

.loader-middle {
  width: 100%;
}

.loading-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  height: 1.5em; /* Prevent layout shift */
}

.progress-container {
  width: 100%;
  height: 24px;
  background: rgba(255,255,255,0.1);
  border: var(--border);
  box-shadow: 6px 6px 0 rgba(0,0,0,0.5);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--yellow), var(--orange));
  transition: width 0.3s ease;
}

/* NEO KEYBOARD */
.neo-keyboard {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.keyboard-row {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.key-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 12px;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.key-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--black);
}

.key-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0px 0px 0 var(--black);
}

.key-btn.key-wide { flex: 4; }
.key-btn.key-green { background: var(--green); color: var(--white); }
.key-btn.key-red { background: var(--red); color: var(--white); }
.key-btn.key-blue { background: var(--blue); color: var(--white); }
.key-btn.key-orange { background: var(--orange); }
.key-btn.key-yellow { background: var(--yellow); }
.key-btn.key-black { background: var(--black); color: var(--yellow); }

.keyboard-display-wrapper {
  width: 100%;
  max-width: 400px;
  margin-bottom: 0px;
}

.keyboard-display {
  background: var(--white);
  font-size: 1.5rem !important;
  height: 60px;
  text-align: center;
  box-shadow: var(--shadow) !important;
}

@media (max-width: 480px) {
  .key-btn {
    font-size: 1.1rem;
    padding: 10px;
  }
  .progress-container {
    height: 20px;
  }
}