:root {
  --bg-dark: #0b0d10;
  --bg-card: #151821;
  --bg-input: #0f1117;
  --border-color: #2b3140;
  --orange-primary: #ff6b00;
  --orange-hover: #e05e00;
  --orange-glow: rgba(255, 107, 0, 0.3);
  --text-main: #fff;
  --text-secondary: #d1d5db;
  --text-muted: #cbd5e1;
}

/* ==========================================
   RESET & TRAVAS GLOBAIS
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  background: var(--bg-dark);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  max-width: 100vw;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, .brand-font {
  color: var(--text-main);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}

/* ==========================================
   NAVBAR & HEADER
   ========================================== */
.navbar-custom {
  background: rgba(21, 24, 33, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 0;
}

.navbar-brand {
  color: #fff !important;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.navbar-brand span, .text-orange {
  color: var(--orange-primary) !important;
}

.nav-link {
  border-radius: 6px;
  color: var(--text-secondary) !important;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.5rem 0.9rem !important;
}

.nav-link:hover, .nav-link:focus, .nav-link.active {
  background: rgba(255, 107, 0, 0.15);
  color: #fff !important;
}

.navbar-toggler {
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.65rem;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem var(--orange-glow);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
  background: linear-gradient(180deg, rgba(255, 107, 0, 0.12), transparent);
  border-bottom: 1px solid rgba(255, 107, 0, 0.15);
  padding: 3.5rem 1rem 2.5rem;
}

.badge-orange {
  background: rgba(255, 107, 0, 0.2);
  border: 1px solid rgba(255, 107, 0, 0.5);
  border-radius: 30px;
  color: #ff944d;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  padding: 0.5em 1em;
  white-space: normal;
  display: inline-block;
  line-height: 1.4;
  max-width: 100%;
}

.hero-copy {
  color: var(--text-muted);
  max-width: 720px;
}

/* ==========================================
   CARDS & FORMULÁRIOS
   ========================================== */
.card-custom {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.card-custom:hover {
  border-color: rgba(255, 107, 0, 0.5);
}

.form-label, .formula-title {
  color: #f1f5f9;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-control, .form-select {
  background: var(--bg-input) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: 8px;
  color: #fff !important;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.7rem 0.9rem;
}

.form-control::placeholder {
  color: #94a3b8 !important;
  opacity: 1;
}

.form-control:focus, .form-select:focus {
  border-color: var(--orange-primary) !important;
  box-shadow: 0 0 0 0.25rem var(--orange-glow) !important;
}

.form-select option {
  background: var(--bg-card);
  color: #fff;
}

.unit-select {
  max-width: 140px;
}

.input-group-text {
  background: #1e2330;
  border: 1px solid var(--border-color);
  color: #e2e8f0;
  font-weight: 600;
  padding: 0.7rem 0.9rem;
}

/* ==========================================
   BOTÕES
   ========================================== */
.btn-orange, .btn-outline-orange {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 700;
  gap: 0.5rem;
  justify-content: center;
  padding: 0.75rem 1.4rem;
}

.btn-orange {
  background: var(--orange-primary);
  border: 0;
  color: #fff !important;
}

.btn-orange:hover, .btn-orange:focus-visible {
  background: var(--orange-hover);
  box-shadow: 0 0 18px var(--orange-glow);
  color: #fff !important;
}

.btn-outline-orange {
  background: rgba(255, 107, 0, 0.08);
  border: 2px solid var(--orange-primary);
  color: #fff !important;
}

.btn-outline-orange:hover, .btn-outline-orange:focus-visible {
  background: var(--orange-primary);
  box-shadow: 0 0 15px var(--orange-glow);
  color: #fff !important;
}

/* ==========================================
   RESULTADOS & FÓRMULAS
   ========================================== */
.result-box {
  background: linear-gradient(135deg, rgba(255, 107, 0, 0.18), rgba(21, 24, 33, 0.95));
  border: 1px solid rgba(255, 107, 0, 0.45);
  border-radius: 10px;
  padding: 1.25rem 0.8rem;
}

.result-label {
  color: #e2e8f0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.result-value {
  color: #ff944d;
  font-family: 'Montserrat', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.1;
  margin: 0.3rem 0;
}

.result-unit {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.formula-badge {
  background: rgba(0, 0, 0, 0.6);
  border-left: 3px solid var(--orange-primary);
  border-radius: 0 6px 6px 0;
  color: #e2e8f0;
  font-family: monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  padding: 12px 16px;
  word-break: break-word;
}

/* ==========================================
   NAV PILLS (TABS)
   ========================================== */
.nav-pills .nav-link {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-muted) !important;
  font-weight: 600;
  padding: 0.7rem 1.25rem;
}

.nav-pills .nav-link:hover {
  background: rgba(255, 107, 0, 0.15);
  border-color: rgba(255, 107, 0, 0.4);
  color: #fff !important;
}

.nav-pills .nav-link.active {
  background: var(--orange-primary) !important;
  border-color: var(--orange-primary);
  box-shadow: 0 4px 15px var(--orange-glow);
  color: #fff !important;
}

/* ==========================================
   AFILIADOS & FOOTER
   ========================================== */
.affiliate-card {
  background: rgba(255, 107, 0, 0.04);
  border: 1px dashed rgba(255, 107, 0, 0.4);
  border-radius: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.affiliate-card:hover {
  background: rgba(255, 107, 0, 0.09);
  border-color: var(--orange-primary);
  transform: translateY(-3px);
}

.affiliate-card p, .site-footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer {
  background: #07090c;
  border-top: 1px solid var(--border-color);
}

/* ==========================================
   PRESETS E CLASSIFICAÇÃO DE POTÊNCIA
   ========================================== */
.preset-btn {
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  border-color: #3b4252;
  color: #d1d5db;
  transition: all 0.2s ease-in-out;
}

.preset-btn:hover {
  background-color: var(--orange-primary);
  border-color: var(--orange-primary);
  color: #fff;
}

.power-classifier {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #2b3140;
}

#power-badge {
  white-space: normal;
  line-height: 1.3;
  display: inline-block;
}

.bg-purple {
  background-color: #8b5cf6 !important;
}

/* ==========================================
   ACCORDION / FAQ
   ========================================== */
.accordion-body,
.accordion-body .text-secondary,
.accordion-body p,
.accordion-body li {
  color: #e2e8f0 !important;
  font-size: 0.95rem;
  line-height: 1.6;
}

.accordion-body strong {
  color: #ffffff !important;
}

.accordion-body code {
  background-color: #1e2433;
  color: #ff8533;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.accordion-button {
  color: #ffffff !important;
  font-weight: 600;
}

.accordion-button:not(.collapsed) {
  background-color: rgba(255, 107, 0, 0.08) !important;
  color: #ff8533 !important;
  box-shadow: none !important;
}

.accordion-button::after {
  filter: invert(1) brightness(2);
}

/* ==========================================
   AJUSTES RESPONSIVOS (MOBILE)
   ========================================== */
@media (max-width: 576px) {
  #page-title {
    font-size: 1.65rem !important;
    line-height: 1.25;
  }

  .hero-copy {
    font-size: 0.9rem !important;
  }

  .navbar-custom .navbar-brand {
    font-size: 0.95rem !important;
  }

  .navbar-custom .navbar-toggler {
    padding: 0.25rem 0.5rem;
    font-size: 0.9rem;
  }

  .unit-select {
    max-width: 110px;
  }

  .result-value {
    font-size: 1.65rem !important;
  }

  .formula-badge {
    font-size: 0.78rem;
    padding: 10px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}