:root {
  /* 🎨 Cores */
  --color-bg-dark: #0d1117; /* fundo principal, preto com toque azulado */
  --color-bg-alt: #161b22; /* seções alternativas, mais claro que o principal */
  --color-bg-highlight: #0a1a2f; /* blocos de destaque */
  
  --color-primary-dark: #005f73; /* azul petróleo escuro */
  --color-primary: #2ca6a4; /* azul vibrante */
  --color-accent: #00f5d4; /* verde água neon */
  --color-accent-light: #5efc8d; /* verde claro suave */
  --color-accent-dark: #00c4a7; /* versão mais escura do accent para hover/active */
  
  --color-gray-light: #ffffff; /* texto claro */
  --color-gray-dark: #6b7280; /* cinza intermediário */
  --color-indigo: #3a86ff; /* azul índigo tecnológico */

  /* 🌈 Gradientes */
  --gradient-primary: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary), var(--color-bg-dark));
  --gradient-secondary: linear-gradient(90deg, var(--color-indigo), var(--color-accent));

  /* 🖋 Tipografia */
  --font-family-base: 'Poppins', sans-serif;
  --font-size-base: 16px;

  /* ✅ Usando clamp para responsividade automática */
  --font-size-h1: clamp(1.8rem, 2vw + 1rem, 3rem);
  --font-size-h2: clamp(1.4rem, 1.5vw + 0.8rem, 2.2rem);
  --font-size-h3: clamp(1.1rem, 1vw + 0.6rem, 1.8rem);

  /* 📐 Container */
  --container-width: 100%;
  --container-padding: clamp(0.75rem, 1vw + 0.5rem, 1.5rem);
  /* Espaçamentos base */
  --spacing-xs: clamp(0.25rem, 0.5vw, 0.5rem);
  --spacing-sm: clamp(0.5rem, 1vw, 1rem);
  --spacing-md: clamp(1rem, 2vw, 2rem);
  --spacing-lg: clamp(1.5rem, 3vw, 3rem);
}

/* 🌞 Tema claro automático 
@media (prefers-color-scheme: light) {
  :root {
    --color-bg-dark: #f6f6f6;
    --color-bg-alt: #e0e0e0;
    --color-bg-highlight: #d9d9d9;
    --color-gray-light: #141414;
    --color-gray-dark: #555;
    --gradient-primary: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary), #f6f6f6);
    --gradient-secondary: linear-gradient(90deg, var(--color-accent), var(--color-indigo));
  }
}*/

/* 🔥 Overrides manuais para tema */
html.dark {
  --color-bg: var(--color-bg-dark);
  --color-text: var(--color-gray-light);
  --color-accent-1: var(--color-accent);
  --color-accent-2: var(--color-accent-light);
  --color-muted: var(--color-gray-dark);
}

/*html.light {
  --color-bg: #f6f6f6;
  --color-text: #141414;
  --color-accent-1: var(--color-accent);
  --color-accent-2: var(--color-accent-light);
  --color-muted: var(--color-gray-dark);
}*/

/* ===========================
   ESTILOS BASE - MOBILE FIRST
=========================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  caret-color: transparent;
}

*:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
  border: none;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.5;
  transition: background 0.3s ease, color 0.3s ease;
  margin: 0;
  height: 100vh;
  overflow-x: hidden;
}

main {
  background-color: var(--color-bg);
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-top: 8rem;
}

/* Containers */
.container {
  width: var(--container-width);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--container-padding);
}

/* Botão de troca de tema */
#theme-toggle {
  display: none;
  background: none;
  color: var(--color-bg-alt);
  border: none;
  margin-top: 0.08rem;
  padding: clamp(0.4rem, 0.8vw, 0.4rem) clamp(1rem, 2vw, 1.2rem);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  
}

#theme-toggle:hover {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-bg);
}

/* ===========================
   TIPOGRAFIA
=========================== */
h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-h2);
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

/* ===========================
   ANIMAÇÕES
=========================== */

.animar-section {
  opacity: 0;
  transform: translateY(50px);
  transition: all 1s ease;
  visibility: visible;
}

.animar-section.visivel {
  opacity: 1;
  transform: translateY(0);
}

.animar-section.saindo {
  opacity: 0;
  transform: translateY(-50px);
}

.btn-whatsapp {
    position: fixed;
    top: 30px;
    right: 20px;
    background-color: var(--color-primary-dark);
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: none;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    z-index: 10000;
    transition: background-color 0.3s ease;
    text-decoration: none;
  }
  .btn-whatsapp:hover {
    background-color: var(--color-primary);
  }

  /* Container fixo para Scroll Top - inferior direito */
  .btn-scroll-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--color-bg-alt);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    display: none; /* só aparece ao rolar a página */
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: background-color 0.3s ease;
  }
  .btn-scroll-top:hover {
    background-color: var(--color-primary-dark);
  }





/* ===========================
   BREAKPOINTS
=========================== */
@media (min-width: 600px) {
  :root {
    --container-padding: clamp(1rem, 2vw + 0.5rem, 2rem);
  }
}

@media (min-width: 768px) {
  :root {
    --font-size-h1: clamp(2rem, 1.5vw + 1.2rem, 3rem);
    --font-size-h2: clamp(1.6rem, 1vw + 1rem, 2.2rem);
    --font-size-h3: clamp(1.3rem, 0.8vw + 0.9rem, 1.8rem);
  }
}

@media (min-width: 1024px) {
  :root {
    --font-size-h1: clamp(2.5rem, 1vw + 1.5rem, 3.5rem);
    --font-size-h2: clamp(2rem, 0.9vw + 1.3rem, 2.4rem);
    --font-size-h3: clamp(1.6rem, 0.6vw + 1.2rem, 2rem);
  }
}

@media (min-width: 1440px) {
  :root {
    --font-size-h1: 3rem;
    --font-size-h2: 2.2rem;
    --font-size-h3: 1.8rem;
  }

  .btn-whatsapp {
    display: flex;
  }
}