:root {
  --font-comic: 'Comic Relief', cursive;
  --color-primary: #818cf8;
  --color-primary-dark: #6366f1;
  --color-primary-border: #c7d2fe;
  --color-gray-800: #1f2937;
  --color-gray-500: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --color-gray-200: #e5e7eb;
  --color-bg-white-50: rgba(255, 255, 255, 0.5);
  --color-bg-white-70: rgba(255, 255, 255, 0.7);
  --color-bg-white-80: rgba(255, 255, 255, 0.8);
  --color-border-white-40: rgba(255, 255, 255, 0.4);
  --color-border-white-60: rgba(255, 255, 255, 0.6);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --drop-shadow-sm: drop-shadow(0 1px 1px rgba(0,0,0,0.05));
  
  --red-50: #fef2f2;
  --red-400: #f87171;
  --red-500: #ef4444;
  --red-600: #dc2626;
  --red-800: #991b1b;
  --green-50: #f0fdf4;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --purple-400: #c084fc;
  --purple-500: #a855f7;
  --orange-400: #fb923c;
  --orange-500: #f97316;
  --slate-200-80: rgba(226, 232, 240, 0.8);
  --slate-300: #cbd5e1;
  --slate-500: #64748b;
  --bg-purple-100-50: rgba(243, 232, 255, 0.5);
  --border-purple-300: #d8b4fe;
  --bg-orange-100-50: rgba(255, 237, 213, 0.5);
  --border-orange-300: #fdba74;
}

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

body {
  font-family: var(--font-comic);
  color: var(--color-gray-800);
  text-transform: uppercase;
  transition: background-color 0.5s ease;
  overflow-x: hidden;
  overflow-y: auto;
  padding-bottom: 3rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.bg-blue-50 { background-color: #eff6ff; }
.bg-indigo-50 { background-color: #eef2ff; }

.app-container {
  max-width: 64rem;
  width: 91.666667%;
  margin: 0 auto;
  padding-top: 1.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
  position: relative;
  z-index: 10;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  background-color: var(--color-bg-white-50);
  backdrop-filter: blur(12px);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-white-40);
}

.metric-box {
  text-align: center;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.border-right { border-right: 2px solid var(--color-gray-200); margin-right: 0.5rem; }
.border-left-right { border-left: 2px solid var(--color-gray-200); border-right: 2px solid var(--color-gray-200); }

.metric-label {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  font-weight: bold;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.metric-value {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-primary-dark);
  filter: var(--drop-shadow-sm);
}

.music-toggle-hud {
  cursor: pointer;
  font-size: 1.5rem;
  transition: transform 0.2s;
  user-select: none;
}

.music-toggle-hud:hover {
  transform: scale(1.2);
}

.progress-wrapper {
  flex: 1;
  margin: 0 0.5rem;
}
.progress-container {
  display: flex;
  gap: 0.25rem;
  height: 2rem;
}
.progress-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 900;
  border-radius: 0.125rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  color: white;
}
.progress-success { background-color: var(--green-600); border-color: var(--green-800); color: white; }
.progress-fail { background-color: var(--red-600); border-color: var(--red-800); color: white; }
.progress-empty { background-color: var(--slate-200-80); border-color: var(--slate-300); color: var(--slate-500); }

.health-wrapper {
  margin-left: 1rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}
.health-container {
  display: flex;
  gap: 0.25rem;
  height: 2rem;
}
.health-item {
  width: 1.25rem;
  height: 2rem;
  border-radius: 0.125rem;
  box-shadow: var(--shadow-sm);
}
.health-full { background-color: var(--green-500); border: 1px solid var(--green-700); }
.health-empty { background-color: rgba(0,0,0,0.1); box-shadow: inset 0 2px 4px rgba(0,0,0,0.06); }

.main-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 1.5rem;
  background-color: var(--color-bg-white-70);
  backdrop-filter: blur(4px);
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-white-60);
  position: relative;
  overflow: hidden;
}

.hints-container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.equation-avatar-wrapper {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  width: 100%;
}
@media (min-width: 768px) {
  .equation-avatar-wrapper { flex-wrap: nowrap; }
}

.equation {
  font-size: 4.5rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  filter: var(--drop-shadow-sm);
}
@media (min-width: 768px) {
  .equation { font-size: 6rem; }
}

.eq-op { color: var(--color-primary); }
.eq-equal { color: var(--color-gray-400); }
.eq-result { color: var(--color-gray-300); }

.controls-container {
  width: 100%;
  max-width: 32rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.buttons-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  width: 100%;
}

.btn-quiz {
  background-color: white;
  border: 4px solid var(--color-primary-border);
  border-radius: 1rem;
  padding: 1.5rem 1rem;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-gray-800);
  cursor: pointer;
  width: 130px;
  transition: transform 0.1s, border-color 0.2s, background-color 0.2s;
  box-shadow: var(--shadow);
  font-family: var(--font-comic);
}
.btn-quiz:hover {
  border-color: var(--color-primary);
  background-color: var(--indigo-50);
}
.btn-quiz:active {
  transform: scale(0.95);
}
.btn-quiz:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Stats HUD in Menu */
.menu-stats-hud {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4rem;
  background-color: var(--color-bg-white-50);
  backdrop-filter: blur(12px);
  padding: 1.25rem 3rem;
  border-radius: 9999px;
  margin: 1rem auto 0 auto;
  border: 1px solid var(--color-border-white-40);
  box-shadow: var(--shadow-sm);
  width: fit-content;
}

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

.stat-label {
  font-size: 0.7rem;
  font-weight: bold;
  opacity: 0.6;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
  color: var(--color-gray-800);
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-primary-dark);
  line-height: 1.1;
}


.levels-master-container {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  padding: 2rem 0 6rem 0;
  width: 100%;
}

.category-group {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.category-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-gray-800);
  padding-left: 1rem;
  border-left: 8px solid var(--color-primary);
  margin-bottom: 0.5rem;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1.25rem;
}

.level-tile {
  background-color: white;
  border: 4px solid var(--color-primary-border);
  border-radius: 1.25rem;
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
}
.level-tile:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
}
.level-tile.locked {
  background-color: var(--color-gray-200);
  border-color: var(--color-gray-300);
  cursor: not-allowed;
  opacity: 0.7;
}
.level-tile.locked:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}
.level-tile.locked .level-num {
  filter: grayscale(1);
  opacity: 0.4;
}

.level-tile {
  position: relative;
}

.level-lock {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 1rem;
}

.level-tile .level-num { 
  font-size: 3rem; 
  font-weight: 900; 
  line-height: 1;
  color: var(--color-primary-dark);
}

.level-tile-max {
  font-size: 0.65rem;
  font-weight: 800;
  opacity: 0.5;
  position: absolute;
  top: 0.75rem;
  text-align: center;
  color: var(--color-gray-800);
}

.level-tile-score {
  font-size: 0.9rem;
  font-weight: 900;
  position: absolute;
  bottom: 0.6rem;
  color: var(--color-primary-dark);
}

.border-left { border-left: 2px solid var(--color-gray-200); margin-left: 0.5rem; }
.answer-input {
  width: 100%;
  text-align: center;
  font-size: 2.25rem;
  padding: 1rem;
  border-radius: 0.75rem;
  border: 4px solid var(--color-primary-border);
  outline: none;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
  background-color: var(--color-bg-white-80);
  transition: border-color 0.2s, background-color 0.2s;
  font-family: var(--font-comic);
}
.answer-input:focus {
  border-color: var(--color-primary);
  background-color: #fff;
}
.answer-input::placeholder { color: var(--color-gray-300); }
.hidden { display: none !important; }

.mat-container {
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 2rem;
  background-color: var(--color-bg-white-50);
  border-radius: 50%;
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-white-40);
  transition: transform 0.3s;
  animation: floatFull 4s ease-in-out infinite;
}
.mat-container svg {
  width: 100%;
  height: 100%;
  display: block;
}

@keyframes floatFull {
  0%   { transform: translateY(0px); }
  50%  { transform: translateY(-12px); }
  100% { transform: translateY(0px); }
}

@media (min-width: 768px) {
  .mat-container { width: 180px; height: 180px; }
}

@media (max-width: 600px) {
  .mat-container { width: 100px; height: 100px; margin-right: 0.5rem; }
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-15px); }
  75% { transform: translateX(15px); }
}
.animate-pop { animation: pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
.animate-shake { animation: shake 0.3s ease-in-out; }

.val-blue { color: var(--blue-500); }
.val-green { color: var(--green-500); }
.val-red { color: var(--red-500); }
.val-purple { color: var(--purple-500); }
.val-orange { color: var(--orange-500); }
.val-result-err { color: var(--red-500); font-weight: bold; animation: pop 0.4s; filter: var(--drop-shadow-sm); }
.val-result-ok { color: var(--green-500); font-weight: bold; animation: pop 0.4s; filter: var(--drop-shadow-sm); }

.hint-wrapper {
  width: 100%;
  max-width: 56rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0 1rem;
  gap: 0.75rem;
}
.hint-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  width: 100%;
}
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }

.hint-circle {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.25rem;
  color: white;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.1);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.hint-circle:hover { transform: translateY(-2px); }
.bg-blue { background-color: var(--blue-400); }
.bg-green { background-color: var(--green-400); }
.bg-red { background-color: var(--red-400); }
.bg-purple { background-color: var(--purple-400); }
.bg-orange { background-color: var(--orange-400); }

.hint-group-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  align-items: flex-start;
}
.hint-group-box-purple {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.5rem;
  border-radius: 0.75rem;
  background-color: var(--bg-purple-100-50);
  border: 2px dashed var(--border-purple-300);
  width: fit-content;
}
.hint-group-box-orange {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.5rem;
  border-radius: 0.75rem;
  background-color: var(--bg-orange-100-50);
  border: 4px solid var(--border-orange-300);
  width: fit-content;
}

.hint-power-text {
  font-size: 1.75rem;
  font-weight: bold;
  color: var(--purple-500);
  background-color: var(--bg-purple-100-50);
  border: 2px dashed var(--border-purple-300);
  padding: 1rem 1.5rem;
  border-radius: 1rem;
  text-align: center;
  margin: 0 auto;
  align-self: center;
  box-shadow: var(--shadow-sm);
  text-transform: none;
}


/* Floating Points Cloud Animation */
.points-cloud {
  position: fixed;
  left: 50%;
  top: 33%;
  transform: translate(-50%, -50%);
  background-color: rgba(231, 207, 70, 0.5);
  border: 6px solid rgba(231, 207, 70, 1);
  border-radius: 50%;
  padding: 0.5rem;
  aspect-ratio: 1 / 1;
  width: 150px;
  height: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  pointer-events: none;
  z-index: 2000;
  animation: floatUpFade 2s ease-out forwards;
  font-family: var(--font-comic);
}

.points-cloud .base-pts {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary-dark);
  line-height: 1;
}

.points-cloud .streak-pts {
  font-size: 2rem;
  font-weight: 900;
  color: #ec4899; /* Pink for streak bonus */
  margin-top: 0.25rem;
}

@keyframes floatUpFade {
  0% {
    opacity: 0;
    transform: translate(-50%, -20%) scale(0.4);
  }
  20% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
  }
  30% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  80% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(130%, -150%) scale(0.6);
  }
}

.overlay-screen {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-xl);
}
.bg-red-overlay { background-color: var(--red-400); }
.bg-green-overlay { background-color: var(--green-400); }

.screen-title { font-size: 6rem; font-weight: bold; margin-bottom: 1rem; filter: drop-shadow(0 4px 3px rgba(0,0,0,0.07)); text-align: center; }
.screen-subtitle { font-size: 1.875rem; margin-bottom: 2rem; filter: drop-shadow(0 4px 3px rgba(0,0,0,0.07)); text-align: center; }
.screen-emoji { font-size: 6rem; margin-bottom: 2rem; }
.btn-overlay {
  background-color: white;
  font-size: 1.875rem;
  font-weight: bold;
  padding: 1rem 3rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-xl);
  transition: background-color 0.2s, transform 0.1s;
  font-family: var(--font-comic);
  text-transform: uppercase;
}
.btn-overlay:active { transform: scale(0.95); }
.btn-red { color: var(--red-500); }
.btn-red:hover { background-color: var(--red-50); }
.btn-green { color: var(--green-500); }
.btn-green:hover { background-color: var(--green-50); }

/* Task Detail Popup (HUD) */
@keyframes taskPopupSlideIn {
  0% {
    opacity: 0;
    transform: translate(-50%, -10px) scale(0.9);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

.animate-task-popup {
  animation: taskPopupSlideIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.25) forwards;
}

.task-detail-popup {
  position: absolute;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border: 2px solid var(--color-primary-border);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  pointer-events: auto;
  transform: translateX(-50%);
  margin-top: 5px;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 150px;
}

.task-detail-popup::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 8px;
  border-style: solid;
  border-color: transparent transparent var(--color-primary-border) transparent;
}

.popup-row {
  font-size: 1.25rem;
  font-weight: 900;
  white-space: nowrap;
}

.popup-row.ok .val {
  color: var(--green-700);
}

.popup-row.err .val {
  color: var(--red-600);
}

.fade-out {
  opacity: 0;
  transition: opacity 0.5s ease-out;
}

/* Backup and HUD Click Styles */
.clickable-hud {
  cursor: pointer;
  user-select: none;
  transition: transform 0.2s, filter 0.2s;
}

.clickable-hud:hover {
  filter: brightness(0.95);
  transform: translateY(-1px);
}

.clickable-hud:active {
  transform: scale(0.95);
}

.backup-link-container {
  display: flex;
  justify-content: center;
  margin-top: 0.75rem;
  min-height: 1.8rem;
}

.backup-link {
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  background-color: var(--color-bg-white-50);
  backdrop-filter: blur(8px);
  border: 1px dashed var(--color-border-white-40);
  padding: 0.35rem 1.25rem;
  border-radius: 9999px;
  text-decoration: none;
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  animation: slideDownFadeIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  font-family: var(--font-comic);
}

.backup-link:hover {
  background-color: var(--color-primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-style: solid;
}

@keyframes slideDownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}