/* ============================================
   BioPro — Design Fintech / SaaS Mobile First
   ============================================ */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-primary: #0f172a;
  --color-accent: #6366f1; /* roxo */
  --color-accent-alt: #22c55e; /* verde */
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
  --transition: 0.2s ease;
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: var(--color-primary);
  color: #fff;
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container--narrow {
  max-width: 640px;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  font-size: 1.125rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.header-nav {
  display: flex;
  gap: 0.75rem;
}

.header-link {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
}

.header-link--pill {
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.header-link:hover {
  text-decoration: underline;
}

.main {
  flex: 1;
  padding: 1.5rem 0 3rem;
}

.main--checkout {
  padding: 2rem 0 3rem;
}

/* Hero */
.hero {
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.hero__subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
}

.hero__badge {
  margin-top: 0.75rem;
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.08);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Card */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* Form */
.form-section {
  margin-bottom: 1.5rem;
}

.form-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group select {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
  background: #fff;
}

.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-error {
  font-size: 0.8125rem;
  min-height: 1.25rem;
  color: #ef4444;
}

.form-quota {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.form-footer {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.btn--full {
  width: 100%;
}

.btn--primary {
  background: var(--color-accent-alt);
  color: #fff;
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.35);
}

.btn--primary:hover {
  background: #16a34a;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.4);
}

.btn--secondary {
  background: var(--color-primary);
  color: #fff;
}

.btn--secondary:hover {
  background: #1f2937;
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
}

.btn--ghost:hover {
  background: rgba(99, 102, 241, 0.06);
}

.btn--lg {
  min-height: 52px;
  font-size: 1.0625rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Result */
.result-section {
  margin-bottom: 2rem;
}

.result-section.hidden {
  display: none;
}

.loader {
  text-align: center;
  padding: 2rem;
}

.loader.hidden {
  display: none;
}

.loader__spinner {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  border-radius: 999px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-accent);
  animation: spin 0.7s linear infinite;
}

.loader__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.result-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

.result-block {
  margin-bottom: 1.25rem;
}

.result-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.result-text {
  font-size: 0.95rem;
  color: var(--color-text);
}

.result-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.bio-variacoes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bio-variacao {
  padding: 0.75rem;
  background: var(--color-surface);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.bio-variacao .result-text {
  margin-top: 0.35rem;
  margin-bottom: 0;
}

.result-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* SEO content */
.seo-content {
  margin-top: 2rem;
}

.content-card h2 {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.content-card h3 {
  font-size: 1.0625rem;
  color: var(--color-text);
  margin: 1rem 0 0.5rem;
}

.content-card p {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

/* Checkout (premium.html) */
.checkout-section {
  padding: 0.5rem 0;
}

.checkout-card {
  padding: 1.75rem;
}

.checkout__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.checkout__price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent-alt);
  margin-bottom: 1rem;
}

.checkout__price-note {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.checkout__features {
  list-style: none;
  margin-bottom: 1.5rem;
}

.checkout__features li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.checkout__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent-alt);
  font-weight: 700;
}

.checkout__disclaimer {
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Footer */
.footer {
  margin-top: auto;
  padding: 1.5rem 1.25rem;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer__text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

/* Responsive */
@media (min-width: 640px) {
  .hero__title {
    font-size: 1.9rem;
  }

  .hero__subtitle {
    font-size: 1.05rem;
  }

  .card {
    padding: 2rem;
  }

  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .header {
    padding: 1.1rem 1.5rem;
  }

  .main {
    padding: 2rem 0 3rem;
  }

  .main--checkout {
    padding: 3rem 0;
  }
}