:root {
  --bg: #0f172a;
  --card: #0b1020;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --danger: #39ff14;
  --border: #1f2937;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial;
  background: linear-gradient(135deg, #0b1020 0%, #0f172a 100%);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
}

/* Container base */
.container {
  width: 100%;
  padding: 20px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

/* Telas compactas */
.tela-login .container,
.tela-cadastro .container {
  max-width: 420px;
}

/* Dashboard */
.tela-dashboard .container {
  max-width: 1000px;
}

/* Card padrão */
.card {
  background-color: var(--card);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 25px rgba(0,0,0,0.4);
  transition: transform 0.3s ease;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

.card:hover { transform: translateY(-4px); }

/* Título */
h1 {
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--danger);
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
}

/* Subtítulo */
.subtitle {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--muted);
  text-align: center;
}

/* ========================= */
/* ESTILOS ESPECÍFICOS LOGIN */
/* ========================= */

.tela-login .card {
  background: rgba(11, 16, 32, 0.92);
  backdrop-filter: blur(6px);
  border-radius: 20px;
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 28px rgba(0,0,0,0.6);
}

.tela-login .form-group {
  margin-bottom: 18px;
}

.tela-login .form-group label {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.tela-login .form-group input {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background-color: #111827;
  color: var(--text);
  transition: all 0.3s ease;
}

.tela-login .form-group input:focus {
  outline: none;
  border-color: var(--danger);
  box-shadow: 0 0 10px var(--danger);
}

.tela-login .btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #1a2335, #0b1220);
  color: var(--danger);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.tela-login .btn:hover {
  background: linear-gradient(135deg, #0b1220, #1a2335);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(57, 255, 20, 0.3);
}

.tela-login .alert {
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  text-align: center;
}

.tela-login .alert-error {
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

@media (max-width: 480px) {
  .tela-login .card {
    padding: 22px;
    border-radius: 16px;
  }

  h1 { font-size: 1.6rem; }
  .subtitle { font-size: 1rem; }

  .tela-login .btn {
    padding: 12px;
    font-size: 1rem;
  }
}

/* ========================= */
/* ESTILOS ESPECÍFICOS DASHBOARD */
/* ========================= */

.tela-dashboard .icon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 3x3 no PC */
  gap: 20px;
  margin-top: 20px;
}

.tela-dashboard .icon-item {
  background: rgba(11, 16, 32, 0.9);
  backdrop-filter: blur(4px);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(0,0,0,0.5);
  min-height: 140px;
}

.tela-dashboard .icon-item:hover {
  background-color: #111827;
  transform: translateY(-4px);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.3);
}

.tela-dashboard .icon-item i {
  font-size: 2.2rem;
  margin-bottom: 10px;
  color: var(--danger);
}

.tela-dashboard .icon-item span {
  font-size: 1rem;
  color: var(--text);
  font-weight: 500;
}

/* Links de ícones e botão sair */
.tela-dashboard a {
  text-decoration: none;
  color: inherit;
}

.tela-dashboard a:visited,
.tela-dashboard a:active,
.tela-dashboard a:hover {
  text-decoration: none;
  color: inherit;
}

/* Botão de sair */
.btn-sair {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #1a2335, #0b1220);
  color: var(--danger);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  margin: 30px auto 0 auto;
  transition: background-color 0.3s, transform 0.2s;
}

.btn-sair:hover {
  background: linear-gradient(135deg, #0b1220, #1a2335);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(57, 255, 20, 0.3);
}

/* Responsividade dashboard */
@media (max-width: 480px) {
  .tela-dashboard .icon-grid {
    grid-template-columns: repeat(2, 1fr); /* 2x2 no celular */
    gap: 16px;
  }

  .tela-dashboard .icon-item {
    padding: 20px;
    min-height: 120px;
  }

  .tela-dashboard .icon-item i {
    font-size: 1.8rem;
  }

  .tela-dashboard .icon-item span {
    font-size: 0.95rem;
  }

  .btn-sair {
    width: 100%;
    justify-content: center;
  }
}