/* ==========================================
   1. VARIÁVEIS CSS (DESIGN TOKENS)
   ========================================== */

:root {
  /* PALETA DE CORES (MESMA DA LP) */
  --color-primary: #A67C52;           /* Marrom Terroso - Títulos e destaques */
  --color-secondary: #F5EFE7;         /* Bege Acolhedor - Background principal */
  --color-accent: #4CAF50;            /* Verde Validado - CTAs */
  --color-accent-hover: #45A049;      /* Verde escuro - Hover nos CTAs */
  --color-accent-light: #E8F5E9;      /* Verde claro - Backgrounds sutis */
  --color-neutral-light: #FDFBF7;     /* Off-White - Cards e containers */
  --color-neutral-dark: #3E3E3E;      /* Cinza Profundo - Textos */
  --color-white: #FFFFFF;             /* Branco puro */
  --color-grey-light: #F0EAE2;        /* Cinza muito claro - Bordas */
  --color-grey-medium: #999999;       /* Cinza médio - Textos secundários */
  --color-grey-dark: #666666;         /* Cinza escuro - Parágrafos */
  
  /* TIPOGRAFIA */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  
  /* TAMANHOS DE FONTE */
  --font-size-large: 24px;
  --font-size-medium: 18px;
  --font-size-normal: 16px;
  --font-size-small: 14px;
  --font-size-tiny: 12px;
  
  /* PESOS DE FONTE */
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* ESPAÇAMENTOS */
  --spacing-xlarge: 48px;
  --spacing-large: 32px;
  --spacing-medium: 24px;
  --spacing-small: 16px;
  --spacing-xsmall: 12px;
  --spacing-tiny: 8px;
  
  /* LAYOUT */
  --container-max-width: 680px;
  --border-radius-small: 8px;
  --border-radius-medium: 12px;
  --border-radius-large: 16px;
  --border-radius-full: 50%;
  
  /* SOMBRAS */
  --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-featured: 0 8px 20px rgba(76, 175, 80, 0.25);
  
  /* TRANSIÇÕES */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ==========================================
   2. RESET E BASE
   ========================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-normal);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-neutral-dark);
  background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-neutral-light) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: var(--spacing-medium) var(--spacing-small);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ==========================================
   3. CONTAINER PRINCIPAL
   ========================================== */

.biolink-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-large) 0;
}

/* ==========================================
   4. HEADER - IDENTIFICAÇÃO
   ========================================== */

.biolink-header {
  text-align: center;
  margin-bottom: var(--spacing-xlarge);
  animation: fadeInDown 0.6s ease-out;
}

/* Foto de Perfil */
.biolink-header__photo {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-medium);
  position: relative;
}

.biolink-header__photo img {
  width: 100%;
  height: 100%;
  border-radius: var(--border-radius-full);
  border: 4px solid var(--color-accent);
  box-shadow: var(--shadow-large);
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.biolink-header__photo img:hover {
  transform: scale(1.05);
}

/* Nome */
.biolink-header__name {
  font-family: var(--font-heading);
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-tiny);
}

/* Handle (@) */
.biolink-header__handle {
  font-size: var(--font-size-normal);
  font-weight: var(--font-weight-semibold);
  color: var(--color-grey-medium);
  margin-bottom: var(--spacing-small);
}

/* Tagline */
.biolink-header__tagline {
  font-size: var(--font-size-small);
  color: var(--color-grey-dark);
  max-width: 400px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ==========================================
   5. CTA PRINCIPAL - TESTE GRATUITO
   ========================================== */

.biolink-cta-primary {
  margin-bottom: var(--spacing-large);
  animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

/* Badge "Novo • Gratuito" */
.biolink-cta-primary__badge {
  text-align: center;
  font-size: var(--font-size-tiny);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 1px;
  margin-bottom: var(--spacing-small);
  animation: pulse 2s ease-in-out infinite;
}

/* ==========================================
   6. BOTÕES (COMPONENTES REUTILIZÁVEIS)
   ========================================== */

.biolink-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-small);
  background-color: var(--color-white);
  border: 2px solid var(--color-grey-light);
  border-radius: var(--border-radius-medium);
  padding: var(--spacing-medium);
  margin-bottom: var(--spacing-medium);
  box-shadow: var(--shadow-small);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.biolink-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.biolink-btn:hover::before {
  left: 100%;
}

.biolink-btn:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
  border-color: var(--color-accent);
}

.biolink-btn:active {
  transform: translateY(-2px);
}

/* Botão em Destaque (Teste Gratuito) */
.biolink-btn--featured {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  border: none;
  padding: var(--spacing-large);
  box-shadow: var(--shadow-featured);
  color: var(--color-white);
}

.biolink-btn--featured:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 12px 28px rgba(76, 175, 80, 0.35);
  transform: translateY(-6px) scale(1.02);
}

.biolink-btn--featured .biolink-btn__title {
  color: var(--color-white);
}

.biolink-btn--featured .biolink-btn__description {
  color: rgba(255, 255, 255, 0.9);
}

.biolink-btn--featured .biolink-btn__arrow {
  color: var(--color-white);
}

/* Ícone do Botão */
.biolink-btn__icon {
  font-size: 32px;
  flex-shrink: 0;
  line-height: 1;
}

.biolink-btn--featured .biolink-btn__icon {
  font-size: 40px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* Conteúdo do Botão */
.biolink-btn__content {
  flex: 1;
  text-align: left;
}

.biolink-btn__title {
  font-family: var(--font-body);
  font-size: var(--font-size-medium);
  font-weight: var(--font-weight-bold);
  color: var(--color-neutral-dark);
  margin-bottom: var(--spacing-tiny);
  line-height: 1.3;
}

.biolink-btn--featured .biolink-btn__title {
  font-size: 20px;
}

.biolink-btn__description {
  font-size: var(--font-size-small);
  color: var(--color-grey-dark);
  line-height: 1.4;
}

/* Seta do Botão */
.biolink-btn__arrow {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.biolink-btn:hover .biolink-btn__arrow {
  transform: translateX(4px);
}

/* ==========================================
   7. LINKS PRINCIPAIS
   ========================================== */

.biolink-links {
  margin-bottom: var(--spacing-xlarge);
}

.biolink-links .biolink-btn {
  animation: fadeInUp 0.6s ease-out backwards;
}

.biolink-links .biolink-btn:nth-child(1) {
  animation-delay: 0.3s;
}

.biolink-links .biolink-btn:nth-child(2) {
  animation-delay: 0.4s;
}

.biolink-links .biolink-btn:nth-child(3) {
  animation-delay: 0.5s;
}

.biolink-links .biolink-btn:nth-child(4) {
  animation-delay: 0.6s;
}

/* ==========================================
   8. FOOTER - BIO E COPYRIGHT
   ========================================== */

.biolink-footer {
  text-align: center;
  padding-top: var(--spacing-large);
  border-top: 1px solid var(--color-grey-light);
  animation: fadeIn 0.6s ease-out 0.7s backwards;
}

.biolink-footer__bio {
  font-size: var(--font-size-small);
  color: var(--color-grey-dark);
  line-height: 1.6;
  max-width: 400px;
  margin: 0 auto var(--spacing-medium);
}

.biolink-footer__copyright {
  font-size: var(--font-size-tiny);
  color: var(--color-grey-medium);
  font-weight: var(--font-weight-regular);
}

/* ==========================================
   9. ANIMAÇÕES
   ========================================== */

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* ==========================================
   10. RESPONSIVIDADE (MEDIA QUERIES)
   ========================================== */

/* Tablets grandes e desktops pequenos */
@media (min-width: 768px) {
  body {
    padding: var(--spacing-xlarge) var(--spacing-medium);
  }

  .biolink-header__photo {
    width: 140px;
    height: 140px;
  }

  .biolink-header__name {
    font-size: 28px;
  }

  .biolink-btn {
    padding: var(--spacing-large);
  }

  .biolink-btn__icon {
    font-size: 36px;
  }

  .biolink-btn--featured .biolink-btn__icon {
    font-size: 48px;
  }

  .biolink-btn__title {
    font-size: 20px;
  }

  .biolink-btn--featured .biolink-btn__title {
    font-size: 24px;
  }

  .biolink-btn__description {
    font-size: var(--font-size-normal);
  }
}

/* Mobile pequeno (ajustes específicos) */
@media (max-width: 380px) {
  .biolink-header__photo {
    width: 100px;
    height: 100px;
  }

  .biolink-header__name {
    font-size: 20px;
  }

  .biolink-btn {
    padding: var(--spacing-small);
  }

  .biolink-btn__icon {
    font-size: 28px;
  }

  .biolink-btn--featured .biolink-btn__icon {
    font-size: 36px;
  }

  .biolink-btn__title {
    font-size: var(--font-size-normal);
  }

  .biolink-btn--featured .biolink-btn__title {
    font-size: var(--font-size-medium);
  }

  .biolink-btn__description {
    font-size: var(--font-size-tiny);
  }
}

/* Modo escuro (opcional - para navegadores que suportam) */
@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(180deg, #2C2416 0%, #3E3E3E 100%);
  }

  .biolink-btn {
    background-color: #4A4A4A;
    border-color: #5A5A5A;
  }

  .biolink-btn__title {
    color: #F5F5F5;
  }

  .biolink-btn__description {
    color: #CCCCCC;
  }

  .biolink-header__name {
    color: var(--color-accent-light);
  }

  .biolink-header__handle {
    color: #AAAAAA;
  }

  .biolink-header__tagline {
    color: #CCCCCC;
  }

  .biolink-footer__bio {
    color: #CCCCCC;
  }

  .biolink-footer__copyright {
    color: #999999;
  }

  .biolink-footer {
    border-top-color: #5A5A5A;
  }
}

/* ==========================================
   11. ESTADOS ESPECIAIS
   ========================================== */

/* Focus (acessibilidade para navegação por teclado) */
.biolink-btn:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* Disabled (caso necessite desabilitar algum link) */
.biolink-btn--disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ==========================================
   12. MELHORIAS DE PERFORMANCE
   ========================================== */

.biolink-btn,
.biolink-header__photo img {
  will-change: transform;
}

/* Reduzir movimento para usuários com preferência de acessibilidade */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}