@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
  --bg-dark: #0b0d19;
  --bg-card: #141729;
  --bg-card-hover: #1e223d;
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --color-gold: #d4af37;
  --color-gold-glow: rgba(212, 175, 55, 0.4);
  --color-cyan: #00e5ff;
  --color-cyan-glow: rgba(0, 229, 255, 0.4);
  --color-purple: #d500f9;
  --color-purple-glow: rgba(213, 0, 249, 0.4);
  --color-success: #10b981;
  --color-error: #ef4444;
  --font-main: 'Outfit', sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
}

/* Header & Navigation */
header {
  width: 100%;
  max-width: 1200px;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--color-gold) 0%, #fff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-key {
  color: var(--color-cyan);
  font-weight: 900;
}

.btn-back {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.btn-back:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-gold);
  box-shadow: 0 0 10px var(--color-gold-glow);
  transform: translateY(-2px);
}



/* Main Content Container */
main {
  flex: 1;
  width: 100%;
  max-width: 1000px;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Dashboard / Menu Styles */
.dashboard-title {
  text-align: center;
  margin-bottom: 2.5rem;
}

.dashboard-title h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(to right, #ffffff, var(--color-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.dashboard-title p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  width: 100%;
  margin-bottom: 3rem;
}

.level-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-gold);
  transform: scaleY(0.7);
  transition: var(--transition-smooth);
}

.level-card.locked {
  opacity: 0.6;
  cursor: not-allowed;
}

.level-card.locked::before {
  background: var(--text-muted);
}

.level-card:hover:not(.locked) {
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  border-color: rgba(212, 175, 55, 0.25);
  box-shadow: 0 10px 25px -10px rgba(0, 0, 0, 0.5);
}

.level-card:hover:not(.locked)::before {
  transform: scaleY(1);
}



.level-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.level-number {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.level-status-icon {
  font-size: 1.2rem;
}

.level-info h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.level-info p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.level-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  font-size: 0.9rem;
}

.score-badge {
  background: rgba(212, 175, 55, 0.1);
  color: var(--color-gold);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  font-weight: 600;
}

.btn-play-level {
  background: linear-gradient(135deg, var(--color-gold) 0%, #b89327 100%);
  border: none;
  color: var(--bg-dark);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition-smooth);
}

.btn-play-level:hover {
  transform: scale(1.05);
  box-shadow: 0 0 12px var(--color-gold-glow);
}

.level-card.locked .btn-play-level {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  cursor: not-allowed;
}

/* Game Interface */
.game-container {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  width: 100%;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.7);
  position: relative;
}

/* HUD / Stats Bar */
.game-hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hud-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.hud-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.hud-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.hud-value {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
}

.hud-value.gold {
  color: var(--color-gold);
}

.hearts-container {
  display: flex;
  gap: 5px;
  font-size: 1.3rem;
}

.heart-filled {
  color: var(--color-error);
  text-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.heart-empty {
  color: rgba(255, 255, 255, 0.15);
}

/* Interactive Staff Area */
.staff-area {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  height: 190px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.staff-svg {
  width: 100%;
  height: 100%;
  max-width: 600px;
}

/* Prompt overlay on top of staff for instructions */
.start-prompt {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 13, 25, 0.95);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  border-radius: 16px;
  z-index: 10;
  transition: var(--transition-smooth);
}

.btn-start-game {
  background: var(--color-cyan);
  border: none;
  color: var(--bg-dark);
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 800;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 0 15px var(--color-cyan-glow);
  transition: var(--transition-smooth);
}

.btn-start-game:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px var(--color-cyan);
}

/* Piano Keyboard Section */
.keyboard-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.keyboard-container {
  display: flex;
  position: relative;
  background: #000;
  padding: 3px;
  border-radius: 12px;
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.8), 0 10px 20px rgba(0,0,0,0.5);
  overflow: hidden;
  max-width: 100%;
}

.piano-key {
  position: relative;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.1s, transform 0.05s, box-shadow 0.1s;
}

.piano-key.white {
  width: 54px;
  height: 150px;
  background: linear-gradient(to bottom, #eeeeee 0%, #ffffff 100%);
  border: 1px solid #cccccc;
  border-radius: 0 0 5px 5px;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 12px;
  font-weight: 700;
  color: #333333;
  font-size: 0.9rem;
}

.piano-key.white:hover {
  background: #fdfdfd;
}

.piano-key.white:active, .piano-key.white.active-key {
  background: linear-gradient(to bottom, #e0e0e0 0%, #d4af37 100%);
  box-shadow: inset 0 4px 6px rgba(0,0,0,0.2), 0 0 10px var(--color-gold-glow);
  color: var(--bg-dark);
}

.piano-key.black {
  width: 32px;
  height: 90px;
  background: linear-gradient(to bottom, #333333 0%, #000000 100%);
  border: 1px solid #111111;
  border-radius: 0 0 4px 4px;
  z-index: 2;
  margin-left: -16px;
  margin-right: -16px;
  box-shadow: 0 5px 5px rgba(0, 0, 0, 0.4);
}

.piano-key.black:active, .piano-key.black.active-key {
  background: linear-gradient(to bottom, #222 0%, var(--color-purple) 100%);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), 0 0 12px var(--color-purple-glow);
}

/* Feedback Notifications and States */
.feedback-box {
  text-align: center;
  min-height: 2rem;
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: var(--transition-smooth);
}

.feedback-correct {
  color: var(--color-success);
  animation: pulse-green 0.4s ease-out;
}

.feedback-wrong {
  color: var(--color-error);
  animation: shake 0.4s ease-out;
}

/* End Game Modal Overlays */
.overlay-modal {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 13, 25, 0.95);
  backdrop-filter: blur(10px);
  z-index: 20;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  border-radius: 24px;
  padding: 2rem;
  text-align: center;
  animation: fadeIn 0.3s ease-out forwards;
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 0.5rem;
}

.modal-icon.win {
  color: var(--color-gold);
  text-shadow: 0 0 20px var(--color-gold-glow);
}

.modal-icon.lose {
  color: var(--color-error);
  text-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.modal-title {
  font-size: 2rem;
  font-weight: 800;
}

.modal-subtitle {
  color: var(--text-muted);
  max-width: 400px;
  line-height: 1.5;
}

.modal-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.btn-primary {
  background: var(--color-gold);
  border: none;
  color: var(--bg-dark);
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 0 10px var(--color-gold-glow);
  transition: var(--transition-smooth);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--color-gold);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

/* Animations */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-10px); }
  40%, 80% { transform: translateX(10px); }
}

@keyframes pulse-green {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); text-shadow: 0 0 10px rgba(16, 185, 129, 0.5); }
  100% { transform: scale(1); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Responsive Customizations */
@media (max-width: 600px) {
  .keyboard-container {
    overflow-x: auto !important;
    display: flex !important;
    flex-wrap: nowrap !important;
    justify-content: flex-start !important;
    width: 100% !important;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px !important;
  }
  .piano-key {
    flex-shrink: 0 !important;
  }
  .piano-key.white {
    width: 32px;
    height: 120px;
    font-size: 0.75rem;
    padding-bottom: 6px;
  }
  
  .piano-key.black {
    width: 20px;
    height: 75px;
    margin-left: -10px;
    margin-right: -10px;
  }
  
  .staff-area {
    height: 140px;
  }
  
  .dashboard-title h1 {
    font-size: 1.8rem;
  }
}

/* --- GAME SCREEN LAYOUT LOCK (PREVENTS SCROLLING) --- */
body.game-page-layout {
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body.game-page-layout header {
  padding: 0.8rem 1.5rem;
}

body.game-page-layout main {
  padding: 0.5rem 1rem 1rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

body.game-page-layout .game-container {
  max-height: calc(100vh - 75px);
  gap: 0.8rem;
  padding: 1rem;
  overflow: hidden;
}

body.game-page-layout .staff-area {
  height: 180px;
  flex: 1;
  min-height: 140px;
}

body.game-page-layout .keyboard-section {
  gap: 0.5rem;
}

body.game-page-layout .piano-key.white {
  height: 140px;
}

body.game-page-layout .piano-key.black {
  height: 85px;
}

/* Adjustments for smaller vertical screens (e.g. laptops, tablets in landscape) */
@media (max-height: 750px) {
  body.game-page-layout header {
    padding: 0.5rem 1rem;
  }
  body.game-page-layout .game-container {
    padding: 0.8rem;
    gap: 0.5rem;
  }
  body.game-page-layout .staff-area {
    height: 150px;
  }
  body.game-page-layout .piano-key.white {
    height: 120px;
  }
  body.game-page-layout .piano-key.black {
    height: 70px;
  }
}