/* --- Variáveis de Design Melodium --- */
:root {
  --bg-page: #f6fdf5;
  --bg-card-green: #C2E0BC;
  --bg-card-white: #ffffff;
  --accent-brown: #612B06;
  --text-color: #612B06;
  --border-color: #612B06;
  --border-width: 1.5px;
  --radius-lg: 1.8rem;
  --radius-md: 1rem;
  --radius-pill: 50rem;

  /* Aliases mantidos para compatibilidade com o seu código */
  --hover-color: #C2E0BC;
  --beat-color: #C2E0BC;
  --beat-forte-color: #612B06;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2vw;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

.border-main {
  border: var(--border-width) solid var(--border-color);
}

/* --- Navbar (Estilo Identidade) --- */
.logo-box {
  color: var(--bg-card-green);
  border-radius: 0.4rem;
  font-size: 0.9rem;
  font-family: monospace;
  font-weight: bold;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5vw;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-login {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.95rem;
}

.btn-signup {
  text-decoration: none;
  color: var(--accent-brown);
  background-color: var(--bg-card-green);
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
}

/* --- CARD CENTRAL DO METRÔNOMO --- */
#metronome {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background-color: var(--bg-card-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  width: 100%;
  max-width: 600px; /* Mantém o design compacto e elegante */
  margin: auto 0;
  box-shadow: none;
}

.metronome-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: var(--border-width) dashed var(--border-color);
  padding-bottom: 1rem;
}

.panel-tag {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

#beat-counter {
  font-size: 2rem;
  font-weight: 800;
  background-color: var(--bg-card-green);
  padding: 0.2rem 1rem;
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--border-color);
}

/* --- CONTAINER DAS BOLINHAS --- */
.metronomeClicksContainer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  padding: 1rem 0;
}

.visualBeat {
  background-color: var(--bg-page);
  border: var(--border-width) solid var(--border-color);
  border-radius: 50%;
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--accent-brown);
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Estado Ativo: Batida Fraca (Verde Sálvia) */
.visualBeat.active {
  background-color: var(--bg-card-green) !important;
  color: var(--accent-brown);
  transform: scale(1.12);
  box-shadow: 0 4px 10px rgba(97, 43, 6, 0.15);
}

/* Estado Ativo: Batida Forte / Tempo 1 (Marrom) */
.visualBeat.active.forte {
  background-color: var(--accent-brown) !important;
  color: var(--bg-page);
  transform: scale(1.15);
}

/* --- PAINEL DE CONTROLE DO SLIDER --- */
.controlBpmAndPlayerContainer {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.flex-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#increaseTempo, #decreaseTempo, 
#metronome-controls-button-minus, #metronome-controls-button-plus {
  background-color: var(--bg-card-green);
  color: var(--accent-brown);
  border-radius: 50%;
  width: 2.8rem;
  height: 2.8rem;
  min-width: 2.8rem;
  min-height: 2.8rem;
  aspect-ratio: 1 / 1;
  padding: 0;
  font-size: 1.3rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s;
}

#increaseTempo:hover, #decreaseTempo:hover,
#metronome-controls-button-minus:hover, #metronome-controls-button-plus:hover {
  transform: scale(1.08);
}

/* Customização do Input Range Retrô */
#bpm-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  background: transparent;
}

#bpm-slider:focus {
  outline: none;
}

/* Track (A barra do controle deslizante) */
#bpm-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 10px;
  cursor: pointer;
  background: var(--bg-card-green);
  border-radius: var(--radius-pill);
  border: var(--border-width) solid var(--border-color);
}

/* Thumb (O pino arrastável) */
#bpm-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  height: 22px;
  width: 22px;
  border-radius: 50%;
  background: var(--accent-brown);
  border: var(--border-width) solid var(--border-color);
  margin-top: -7px;
  cursor: pointer;
  transition: transform 0.1s;
}

#bpm-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.metronome-volume-panel {
  display: grid;
  gap: 0.8rem;
  padding: 1.2rem 1rem;
  background: var(--bg-page);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: left;
}

.metronome-volume-panel label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-brown);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metronome-volume-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#metronome-volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  background: transparent;
}

#metronome-volume-slider:focus {
  outline: none;
}

#metronome-volume-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-card-green);
  border: var(--border-width) solid var(--border-color);
}

#metronome-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-brown);
  border: var(--border-width) solid var(--border-color);
  margin-top: -6px;
  cursor: pointer;
  transition: transform 0.1s;
}

#metronome-volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

#metronome-volume-value {
  min-width: 3rem;
  font-weight: 700;
  color: var(--accent-brown);
}

/* Mostrador de Texto do BPM */
.bpm-text-display {
  font-weight: 700;
  margin: 0.5rem 0;
}

#bpm-display {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}

.bpm-sub {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Botão Start / Stop (Principal) */
#start-stop {
  background-color: var(--accent-brown);
  color: var(--bg-card-green);
  padding: 1rem;
  border-radius: var(--radius-pill);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s;
}

#start-stop:hover {
  transform: scale(1.02);
}

/* --- CONFIGURAÇÃO DE TEMPOS (COMPASSO) --- */
.metronomeControls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background-color: var(--bg-page);
  border: var(--border-width) dashed var(--border-color);
  padding: 0.8rem;
  border-radius: var(--radius-md);
}

.beat-count-wrapper {
  display: flex;
  flex-direction: column;
  min-width: 4rem;
}

#metronome-controls-beat-count {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
}

.beat-count-label {
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.7;
  text-transform: uppercase;
}

/* --- Ajustes Responsivos Móveis --- */
@media (max-width: 480px) {
  #metronome {
    padding: 1.5rem;
  }
  .visualBeat {
    width: 2.8rem;
    height: 2.8rem;
    font-size: 1rem;
  }
}