/* Variáveis de tema */
:root{
  --bg: #0f1724;         /* fundo escuro */
  --card: #0b1220;       /* cartão */
  --muted: #9aa6b2;      /* texto secundário */
  --accent: #00b7ff;     /* cor principal (azul-ciano) */
  --accent-2: #7df9ff;   /* tom claro do accent */
  --text: #eef6fb;       /* texto principal */
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 12px;
  --glass: rgba(255,255,255,0.03);
  --shadow: 0 6px 20px rgba(2,6,23,0.6);
  font-size: 16px;
}

/* Reset simples */
*{box-sizing: border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background: linear-gradient(180deg, var(--bg), #071021 120%);
  color:var(--text);
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing:antialiased;
  padding: 32px;
  line-height:1.4;
}

/* Container central */
.app {
  max-width:980px;
  margin: 0 auto;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
  padding: 28px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.03);
}

/* Cabeçalho */
h1{
  font-size: 1.6rem;
  margin-bottom: 8px;
}
h2{
  font-size: 1.05rem;
  color:var(--muted);
  margin: 18px 0 12px;
}

/* Grid: forms à esquerda, músicas à direita (desktop) */
.grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 20px;
  align-items: start;
}

/* Card de formulário */
.card {
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,0.01));
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.02);
}

/* Formulários */
form {
  display: grid;
  gap:10px;
}

input[type="email"],
input[type="password"],
input[type="text"],
button {
  width:100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  font-size: 0.95rem;
}

/* Placeholder */
::placeholder{color: #7f8a93}

/* Botões */
button {
  cursor: pointer;
  border: none;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #02121a;
  font-weight:600;
  transition: transform .12s ease, box-shadow .12s ease;
  box-shadow: 0 6px 18px rgba(3,14,26,0.4);
}
button:active{ transform: translateY(1px) }
.btn-ghost{
  background: transparent;
  border: 1px dashed rgba(255,255,255,0.04);
  color:var(--muted);
  box-shadow: none;
}

/* Lista de músicas (coluna direita) */
.sidebar {
  display: flex;
  flex-direction: column;
  gap:12px;
}
.musica-card {
  display:flex;
  gap:12px;
  align-items:center;
  background:var(--glass);
  padding:10px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.03);
}
.musica-art{
  width:48px;height:48px;border-radius:8px;background:linear-gradient(135deg,#032231,#01364b);
  display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--accent-2)
}
.musica-info{ font-size:0.95rem }
.musica-info small{ display:block;color:var(--muted); font-size:0.85rem }

/* Lista sem músicas */
.empty {
  color:var(--muted);
  padding:10px;
  text-align:center;
  border-radius:8px;
  border:1px dashed rgba(255,255,255,0.02);
}

/* Mensagens de sucesso/erro */
.alert {
  padding:8px 12px;
  border-radius:8px;
  font-weight:600;
}
.alert.success{ background: rgba(34,197,94,0.12); color: var(--success); }
.alert.error{ background: rgba(239,68,68,0.08); color: var(--danger); }

/* Pequenas melhorias visuais */
.footer {
  margin-top:18px;
  color:var(--muted);
  font-size:0.9rem;
  text-align:center;
}

/* Responsivo: em telas pequenas empilha tudo */
@media (max-width:900px){
  .grid{ grid-template-columns: 1fr; }
  .sidebar{ order: -1 } /* coloca a sidebar acima em mobile, opcional */
  body{ padding:18px }
}