:root {
  /* ===== CORES ===== */
  --bg: #000;
  --card: rgba(26, 26, 26, 0.65);
  --primary: #8b0000;
  --text: #e5e5e5;

  --border: rgba(255, 255, 255, 0.06);
  --soft: rgba(255, 255, 255, 0.04);
  --glow: rgba(139, 0, 0, 0.6);

  /* ===== UI ===== */
  --radius: 12px;
  --radius-lg: 18px;

  --space-xs: 5px;
  --space-sm: 10px;
  --space-md: 15px;
  --space-lg: 20px;

  --transition: 0.3s;

  /* ===== SOMBRAS ===== */
  --shadow-soft: 0 0 20px rgba(0,0,0,0.5);
  --shadow-strong: 0 0 40px rgba(0,0,0,0.6);
}

/* ===== TEMAS ===== */
body.dark {
  --bg: #000;
  --primary: #8b0000;
  --glow: rgba(139, 0, 0, 0.6);
}

body.blood {
  --bg: #140000;
  --primary: #ff1a1a;
  --glow: rgba(255, 0, 0, 0.7);
}

body.midnight {
  --bg: #0a0f1f;
  --primary: #3b82f6;
  --glow: rgba(59, 130, 246, 0.6);
}

/* ===== BASE ===== */
body {
  background:
    radial-gradient(circle at 20% 10%, var(--glow), transparent 40%),
    radial-gradient(circle at 80% 90%, var(--glow), transparent 40%),
    var(--bg);

  color: var(--text);
  font-family: 'Segoe UI', sans-serif;
  padding: var(--space-lg);

  transition: var(--transition);
}

/* ===== TIPOGRAFIA ===== */
h2 {
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: var(--space-sm);
  text-shadow: 0 0 10px var(--glow);
}

label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: 14px;
  opacity: 0.9;
}

small {
  display: block;
  margin: -8px 0 var(--space-sm);
  font-size: 12px;
  opacity: 0.6;
}

/* ===== BLOCO PADRÃO (REUTILIZÁVEL) ===== */
.glass {
  background: linear-gradient(145deg, var(--card), rgba(255,255,255,0.02));
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ===== CONTAINER ===== */
.form-container {
  max-width: 700px;
  margin: auto;
  padding: var(--space-lg);

  box-shadow: var(--shadow-strong);
}

.form-container,
.checkbox-group,
#resultado {
  /* herda estilo glass */
  background: linear-gradient(145deg, var(--card), rgba(255,255,255,0.02));
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ===== FIELDSET ===== */
fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

legend {
  padding: 0 var(--space-sm);
  font-size: 14px;
  opacity: 0.8;
}

/* ===== INPUTS ===== */
input {
  width: 100%;
  margin-bottom: var(--space-md);
  padding: 12px;

  border-radius: var(--radius);
  border: 1px solid var(--border);

  background: var(--soft);
  color: var(--text);

  outline: none;
  transition: var(--transition);
}

input:hover {
  transform: scale(1.01);
}

input:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,0.06);

  box-shadow:
    0 0 0 1px var(--primary),
    0 0 15px var(--glow);
}

/* ===== GRUPOS ===== */
.grupo-palavras {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.grupo-palavras input {
  flex: 1;
  min-width: 120px;
}

/* ===== BOTÕES ===== */
button {
  padding: 10px 16px;
  margin: 5px 5px 10px 0;

  background: linear-gradient(135deg, var(--primary), #000);
  color: #fff;

  border: 1px solid var(--border);
  border-radius: 8px;

  cursor: pointer;
  position: relative;
  overflow: hidden;

  transition: var(--transition);
}

button:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 20px var(--glow);
}

button::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 150%;

  background: linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.2),
    transparent
  );

  left: -150%;
  transition: 0.6s;
}

button:hover::after {
  left: 100%;
}

/* ===== PROGRESSO ===== */
#barra {
  width: 100%;
  height: 14px;
  margin-bottom: var(--space-lg);

  background: var(--soft);
  border-radius: 20px;
  overflow: hidden;
}

#progresso {
  height: 100%;
  width: 0%;

  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 20px;

  box-shadow: 0 0 15px var(--glow);
  transition: 0.4s;
}

/* ===== CHECKBOX ===== */
.checkbox-group {
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  transition: var(--transition);
}

.checkbox-group:hover {
  box-shadow: 0 0 15px var(--glow);
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ===== RESULTADO ===== */
#resultado {
  white-space: pre-wrap;

  padding: var(--space-lg);
  margin-top: 25px;

  line-height: 1.7;
  box-shadow: var(--shadow-soft);

  animation: fadeIn 0.5s ease;
}

/* ===== CARD ===== */
.card {
  position: relative;
  margin-top: 30px;
  padding: 28px;

  border-radius: var(--radius-lg);
  overflow: hidden;

  background:
    linear-gradient(145deg, rgba(0,0,0,0.9), rgba(20,0,0,0.8)),
    radial-gradient(circle at top, rgba(139,0,0,0.2), transparent 60%);

  border: 1px solid rgba(255,255,255,0.08);

  box-shadow:
    0 0 40px rgba(139,0,0,0.4),
    inset 0 0 30px rgba(255,255,255,0.02);

  backdrop-filter: blur(12px);
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;

  background: linear-gradient(120deg, transparent, rgba(139,0,0,0.5), transparent);

  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

/* ===== CARD INFO ===== */
.card h3 {
  font-size: 24px;
  text-align: center;
  margin-bottom: 5px;
  letter-spacing: 1px;
  text-shadow: 0 0 15px rgba(139,0,0,0.6);
}

.card .sub {
  text-align: center;
  font-size: 12px;
  letter-spacing: 2px;
  opacity: 0.6;
  margin-bottom: 20px;
}

.card .info {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 14px;
}

.card .info span {
  opacity: 0.7;
}

.card .info strong {
  text-align: right;
}

.card .id {
  text-align: right;
  margin-top: 10px;
  font-size: 11px;
  opacity: 0.6;
}

.card .footer {
  margin-top: 20px;
  font-size: 11px;
  text-align: center;
  opacity: 0.5;
}

/* ===== SELO ===== */
.selo {
  position: absolute;
  top: 12px;
  right: 12px;

  background: linear-gradient(135deg, var(--primary), #000);
  padding: 6px 12px;

  border-radius: 20px;
  font-size: 10px;
  letter-spacing: 1px;

  box-shadow: 0 0 10px var(--glow);
}

/* ===== ANIMAÇÃO ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {

  body {
    padding: 12px;
  }

  .form-container {
    padding: var(--space-md);
  }

  h2 {
    font-size: 20px;
    text-align: center;
  }

  input {
    padding: 14px;
    font-size: 15px;
  }

  .acoes {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .acoes button {
    width: 100%;
    padding: 14px;
  }

  .temas {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
  }

  .temas button {
    flex: 1;
    min-width: 90px;
  }

  .checkbox-group label {
    padding: 8px;
    border-radius: 8px;
    background: rgba(255,255,255,0.03);
  }

  .checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
  }

  #barra {
    height: 16px;
  }

  #resultado {
    font-size: 14px;
    padding: var(--space-md);
  }
}