:root {
  /* Cores principais */
  --color-primary: #ffffff;
  --color-secondary: #8b4513;
  --color-accent: #f5f5f5;
  
  /* Cores de fundo */
  --color-background: #000000;
  --color-surface: #1a1a1a;
  --color-surfaceHover: #2a2a2a;
  
  /* Cores de texto */
  --color-textPrimary: #e0e0e0;
  --color-textSecondary: #b0b0b0;
  --color-textMuted: #808080;
  
  /* Cores de status */
  --color-success: #4caf50;
  --color-warning: #ff9800;
  --color-error: #f44336;
  --color-info: #2196f3;
  
  /* Cores específicas da aplicação */
  --color-songComplete: #4caf50;
  --color-songIncomplete: #666666;
  --color-instrumentComplete: #4caf50;
  --color-instrumentIncomplete: #666666;
  --color-partCollected: #4caf50;
  --color-partNotCollected: #666666;
  
  /* Cores de botões */
  --color-buttonPrimary: #8b4513;
  --color-buttonPrimaryHover: #a0522d;
  --color-buttonSecondary: #8b4513;
  --color-buttonSecondaryHover: #a0522d;
  
  /* Cores de bordas */
  --color-border: #444444;
  --color-borderLight: #333333;
  --color-borderDark: #555555;
  
  /* Cores de sombra */
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-shadowHover: rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
  color: var(--color-textPrimary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.header-content {
  padding: 2rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--color-textPrimary);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

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

.header-logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}

.language-selector {
  margin-left: -4rem;
  display: flex;
  gap: 0.5rem;
}

.flag-btn {
  background: rgba(0, 0, 0, 0.3);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: all 0.1s ease;
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;  
  padding: 0;
  overflow: hidden;
}

.flag-btn.active {
  background: rgba(255, 204, 0, 0.3);
  border-color: var(--color-accent);
  box-shadow: 0 0 15px var(--color-primary);
  transform: scale(1);
}

.flag-icon {
  width: 30px;
  height: 30px;
  object-fit: cover;
  border-radius: 50%;
  transition: transform 0.1s ease;
}

.flag-btn:hover .flag-icon {
  transform: scale(1);
}

.flag-btn:focus {
  outline: none;
}

@media (max-width: 768px) {
  .header-top {
    flex-direction: column;
    gap: 1rem;
  }
  
  .header-logo {
    width: 48px;
    height: 48px;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  .flag-btn {
    width: 30px;
    height: 30px;
  }
  
  .flag-icon {
    width: 25px;
    height: 25px;
  }
  
  .instruments {
    gap: 0.8rem;
  }
  
  .instrument {
    min-width: 120px;
    max-width: 160px;
  }
  
  .progress-summary {
    gap: 1rem;
  }
  
  .progress-item {
    min-width: 140px;
    padding: 0.5rem 0.8rem;
  }
}

@media (max-width: 480px) {
  .header-logo {
    width: 40px;
    height: 40px;
  }
  
  h1 {
    font-size: 1.2rem;
  }
  
  .flag-btn {
    width: 25px;
    height: 25px;
  }
  
  .flag-icon {
    width: 20px;
    height: 20px;
  }
  
  .instruments {
    flex-direction: column;
    gap: 0.8rem;
  }
  
  .instrument {
    min-width: 100%;
    max-width: 100%;
  }
  
  .progress-summary {
    flex-direction: column;
    gap: 1rem;
  }
  
  .progress-item {
    min-width: auto;
  }
  
  .footer-actions {
    flex-direction: column;
    gap: 0.5rem;
  }
}

h1 {
  color: var(--color-primary);
  font-size: 2rem;
  margin: 0;
  text-align: center;
  flex: 1;
}

.header-content p {
  color: var(--color-textSecondary);
  font-size: 1rem;
  margin-bottom: 1rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.progress-summary {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.progress-item {
  background: rgba(255, 204, 0, 0.1);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 204, 0, 0.3);
  min-width: 160px;
  text-align: center;
}

.progress-label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-textPrimary);
  margin-bottom: 0.2rem;
}

.progress-item span:last-child {
  font-size: 1rem;
  font-weight: bold;
  color: var(--color-textPrimary);
}

.clickable-counter {
  cursor: pointer;
  transition: all 0.1s ease;
  padding: 0.1rem 0.2rem;
  border-radius: 4px;
  display: inline-block;
}

.clickable-counter:hover {
  background: rgba(255, 204, 0, 0.2);
  transform: scale(1);
  color: var(--color-textPrimary) !important;
}

.songs-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.song {
  background: linear-gradient(145deg, var(--color-surface) 0%, var(--color-surfaceHover) 100%);
  border-radius: 8px;
  padding: 0.7rem;
  box-shadow: 0 6px 18px var(--color-shadow);
  border: 1px solid rgba(255, 204, 0, 0.2);
  transition: all 0.5s ease;
}

.song-complete {
  background: linear-gradient(145deg, var(--color-songComplete) 0%, var(--color-songComplete) 100%);
  border: 1px solid var(--color-songComplete);
  box-shadow: 0 8px 25px var(--color-songComplete);
  opacity: 0.8;
  animation: completeGlow 1s ease-in-out;
}

@keyframes completeGlow {
  0% {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 12px 35px rgba(129, 199, 132, 0.6);
    transform: scale(1.02);
  }
  100% {
    box-shadow: 0 8px 25px rgba(129, 199, 132, 0.2);
    transform: scale(1);
  }
}

.song-just-completed {
  animation: justCompleted 1.5s ease-in-out;
}

@keyframes justCompleted {
  0% {
    transform: scale(1);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  }
  25% {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(129, 199, 132, 0.8);
  }
  50% {
    transform: scale(1.03);
    box-shadow: 0 20px 50px rgba(129, 199, 132, 1);
  }
  75% {
    transform: scale(1.01);
    box-shadow: 0 12px 35px rgba(129, 199, 132, 0.6);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 8px 25px rgba(129, 199, 132, 0.2);
  }
}


.song-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid rgba(255, 204, 0, 0.4);
  justify-content: flex-start;
}

.song-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
  transition: transform 0.3s ease;
}

.song h3 {
  color: var(--color-accent);
  font-size: 1.2rem;
  margin: 0;
  text-shadow: 2px 2px 4px var(--color-shadow);
}

.complete-indicator {
  background: linear-gradient(45deg, var(--color-success), var(--color-success));
  color: var(--color-textPrimary);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: bold;
  box-shadow: 0 2px 8px var(--color-success);
  margin-left: 0.4rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 2px 8px rgba(129, 199, 132, 0.4);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(129, 199, 132, 0.6);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 2px 8px rgba(129, 199, 132, 0.4);
  }
}

.instruments {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.7rem;
  justify-content: flex-start;
}

.instrument {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.3s ease;
  min-width: 140px;
  max-width: 180px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.instrument.complete {
  background: rgba(129, 199, 132, 0.15);
  border-color: rgba(129, 199, 132, 0.4);
  box-shadow: 0 0 15px rgba(129, 199, 132, 0.2);
}

.instrument-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.instrument-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}

.instrument.complete .instrument-icon {
  filter: drop-shadow(0 2px 4px rgba(129, 199, 132, 0.6));
}

.instrument-name {
  color: var(--color-textPrimary);
  font-weight: bold;
  font-size: 0.85rem;
  text-shadow: 1px 1px 2px var(--color-shadow);
}

.instrument.complete .instrument-name {
  color: var(--color-instrumentComplete);
}

.parts {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
  margin-top: 0.3rem;
}

.part-checkbox {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.4rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
}

.part-checkbox input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--color-primary);
  cursor: pointer;
  transform: scale(1.05);
}

.part-checkbox span {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--color-textPrimary);
  flex: 1;
  font-weight: 500;
  transition: all 0.3s ease;
}

.part-checkbox input[type="checkbox"]:checked + span {
  color: var(--color-partCollected);
  text-decoration: line-through;
  font-weight: bold;
}

.part-checkbox input[type="checkbox"]:checked {
  accent-color: var(--color-partCollected);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(255, 204, 0, 0.2);
  text-align: center;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-info p {
  color: var(--color-textSecondary);
  font-size: 0.9rem;
  margin: 0;
}

.footer-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0 0.5rem;
}

.btn-primary {
  background: linear-gradient(45deg, var(--color-buttonPrimary), var(--color-buttonPrimaryHover));
  color: var(--color-textPrimary);
}

.btn-secondary {
  background: linear-gradient(45deg, var(--color-buttonSecondary), var(--color-buttonSecondaryHover));
  color: var(--color-textPrimary);
}

/* Botão de voltar ao topo */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--color-buttonPrimary), var(--color-buttonPrimaryHover));
  border: none;
  color: var(--color-textPrimary);
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--color-shadow);
  transition: all 0.3s ease;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}

.back-to-top-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--color-shadowHover);
  background: linear-gradient(45deg, var(--color-buttonPrimaryHover), var(--color-buttonPrimary));
}

.back-to-top-btn:active {
  transform: translateY(-1px);
}

.back-to-top-btn.show {
  display: flex;
}

/* Responsividade */
@media (max-width: 1200px) {
  .instruments-container {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
}

@media (max-width: 768px) {
  .progress-summary {
    flex-direction: column;
    gap: 1rem;
  }
  
  .progress-item {
    min-width: auto;
  }
  
  .songs-container {
    padding: 0.8rem;
  }
  
  .instruments-container {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.8rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .header-content p {
    font-size: 1rem;
  }
  
  .song h3 {
    font-size: 1.1rem;
  }
  
  .song-icon {
    width: 24px;
    height: 24px;
  }
  
  .instrument {
    min-height: 100px;
    padding: 0.5rem;
  }
  
  .instrument-icon {
    width: 20px;
    height: 20px;
  }
  
  .instrument-name {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .back-to-top-btn {
    bottom: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
    font-size: 1.3rem;
  }
  
  .instruments-container {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.6rem;
  }
  
  .instrument {
    min-height: 90px;
    padding: 0.5rem;
  }
  
  .instrument-header {
    gap: 0.3rem;
    margin-bottom: 0.5rem;
  }
  
  .instrument-icon {
    width: 18px;
    height: 18px;
  }
  
  .instrument-name {
    font-size: 0.75rem;
  }
  
  .song-header {
    gap: 0.5rem;
    margin-bottom: 0.7rem;
  }
  
  .song h3 {
    font-size: 1rem;
  }
  
  .song-icon {
    width: 20px;
    height: 20px;
  }
  
  .btn {
    display: block;
    width: 100%;
    margin: 0.5rem 0;
  }
  
  .part {
    padding: 0.3rem;
    gap: 0.3rem;
  }
  
  .part label {
    font-size: 0.75rem;
  }
  
  .part input[type="checkbox"] {
    width: 12px;
    height: 12px;
  }
}