/* css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Marca: PPA Minimal */
  --primary: #FF5A00; /* Naranja PPA */
  --primary-hover: #E04D00;
  --secondary: #0A192F; /* Azul Marino Profundo (Tonalidad Institucional) */
  --bg-color: #FFFFFF;
  --bg-light: #F8F9FA;
  --text-main: #1A1A1A;
  --text-muted: #666666;
  --white: #FFFFFF;
  
  /* Tipografía */
  --font-family: 'Inter', system-ui, sans-serif;
  
  /* Sistema de Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Elevación / Sombras */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 24px rgba(0,0,0,0.12);
  
  /* Bordes */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Animaciones */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
}

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

html, body {
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.nav-open {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--secondary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.8rem); }

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-lg) 0;
  }
  .container {
    padding: 0 1.25rem;
  }
}

/* ========================================
   DARK MODE (Auto-detectado por SO)
   ======================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0D1117;
    --bg-light: #161B22;
    --text-main: #E6EDF3;
    --text-muted: #8B949E;
    --white: #161B22;
    --secondary: #C9D1D9;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 24px rgba(0,0,0,0.5);
  }

  body {
    background-color: var(--bg-color);
    color: var(--text-main);
  }

  .navbar {
    background-color: rgba(13, 17, 23, 0.95) !important;
    border-bottom: 1px solid #21262D;
  }

  .navbar-links a {
    color: #C9D1D9 !important;
  }

  .navbar-links a:hover,
  .navbar-links a.active {
    color: var(--primary) !important;
  }

  .feature-card,
  .product-card,
  .course-card,
  .contact-form,
  .benefit-card,
  .filter-sidebar,
  .stats-bar,
  .price-card,
  .carousel-card {
    background-color: #161B22 !important;
    border-color: #21262D !important;
    color: #C9D1D9;
  }

  .toggle-btn {
    background: #0D1117;
    border-color: #21262D;
    color: #C9D1D9;
  }

  .price-image {
    background-color: #0D1117 !important;
    border-color: #21262D !important;
  }

  .carousel-card img {
    background-color: #0D1117 !important;
    border-color: #21262D !important;
  }

  .carousel-fade.left {
    background: linear-gradient(90deg, rgba(13,17,23,0.95), rgba(13,17,23,0));
  }
  .carousel-fade.right {
    background: linear-gradient(270deg, rgba(13,17,23,0.95), rgba(13,17,23,0));
  }

  .feature-card h3,
  .product-title,
  .course-title {
    color: #E6EDF3 !important;
  }

  .feature-card p,
  .product-desc,
  .course-desc,
  .text-muted {
    color: #8B949E !important;
  }

  .footer {
    background-color: #010409 !important;
    border-top: 1px solid #21262D;
  }

  .page-header {
    background-color: #161B22 !important;
  }

  .product-img-container {
    background-color: #0D1117 !important;
    border-color: #21262D !important;
  }

  .product-specs {
    background-color: #0D1117 !important;
  }

  .form-control {
    background-color: #0D1117 !important;
    border-color: #30363D !important;
    color: #E6EDF3 !important;
  }

  .form-control:focus {
    border-color: var(--primary) !important;
    background-color: #161B22 !important;
  }

  .brand-logo {
    filter: brightness(1.1);
  }

  .info-icon {
    background-color: rgba(201, 209, 217, 0.08) !important;
    color: #C9D1D9 !important;
  }

  .info-content h4 {
    color: #8B949E !important;
  }

  .info-content p {
    color: #E6EDF3 !important;
  }

  .mobile-menu-btn {
    color: #C9D1D9;
  }
}