/* === RESET Y VARIABLES === */
:root {
  --color-primary: #4ADEDE;
  --color-primary-dark: #0E7C7B; /* Versión oscura para accesibilidad */
  --color-dark: #333333;
  --color-light: #F8F9FA;
  --color-white: #FFFFFF;
  --color-gray: #6c757d;
  --font-main: 'Inter', sans-serif;
  --font-head: 'Poppins', sans-serif;
  --shadow: 0 4px 6px rgba(0,0,0,0.05);
  --radius: 8px;
}

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

body {
  font-family: var(--font-main);
  color: var(--color-dark);
  background-color: var(--color-white);
  line-height: 1.6;
}

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 600; line-height: 1.2; }
h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 1.5rem; color: var(--color-dark); }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
p { margin-bottom: 1rem; }

a { color: var(--color-primary-dark); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--color-primary); }

/* === ACCESIBILIDAD: SKIP LINK === */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--color-primary-dark); color: white;
  padding: 8px; z-index: 1000;
}
.skip-link:focus { top: 0; }

/* === LAYOUT === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
section { padding: 60px 0; }
section.bg-light { background-color: var(--color-light); }
.text-center { text-align: center; }

/* === HEADER === */
header {
  background: var(--color-white);
  position: sticky; top: 0; z-index: 100;
  box-shadow: var(--shadow);
}
.nav-container {
  display: flex; justify-content: space-between; align-items: center;
  height: 80px;
}
.logo img { height: 40px; width: auto; }
.nav-menu { display: flex; list-style: none; gap: 30px; }
.nav-menu a { font-weight: 500; color: var(--color-dark); }
.nav-menu a:hover { color: var(--color-primary-dark); }

/* === BOTONES === */
.btn {
  display: inline-block; padding: 12px 24px;
  border-radius: 50px; font-weight: 600; text-align: center;
  cursor: pointer; border: none; transition: all 0.3s ease;
}
.btn-primary { background-color: var(--color-primary-dark); color: white; }
.btn-primary:hover { background-color: var(--color-primary); color: var(--color-dark); }
.btn-outline { border: 2px solid var(--color-primary-dark); color: var(--color-primary-dark); background: transparent; }

/* === HERO === */
.hero {
  background: linear-gradient(135deg, rgba(74, 222, 222, 0.1) 0%, rgba(51, 51, 51, 0.05) 100%);
  padding: 100px 0;
  text-align: center;
}
.hero h1 span { color: var(--color-primary-dark); }

/* === GRIDS Y TARJETAS === */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.card {
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-top: 4px solid var(--color-primary);
  transition: transform 0.3s;
}
.card:hover { transform: translateY(-5px); }
.card svg { width: 48px; height: 48px; stroke: var(--color-primary-dark); margin-bottom: 15px; }

/* === WHATSAPP FLOAT === */
.whatsapp-float {
  position: fixed; bottom: 20px; right: 20px;
  background-color: #25D366; color: white;
  width: 60px; height: 60px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3); z-index: 999;
}
.whatsapp-float svg { width: 32px; height: 32px; fill: white; }

/* === FOOTER === */
footer { background-color: var(--color-dark); color: white; padding: 40px 0; }
footer a { color: #cccccc; }
footer .nav-container { display: block; }

/* === FORMULARIOS === */
form { display: grid; gap: 15px; max-width: 600px; margin: 0 auto; }
label { font-weight: 500; margin-bottom: 5px; display: block; }
input, textarea, select {
  width: 100%; padding: 12px; border: 1px solid #ccc;
  border-radius: var(--radius); font-family: var(--font-main);
}
input:focus, textarea:focus { outline: 3px solid var(--color-primary); border-color: var(--color-primary-dark); }

/* === FAQ (ACORDEÓN) === */
details { background: white; margin-bottom: 10px; border-radius: var(--radius); padding: 15px; box-shadow: var(--shadow); }
summary { cursor: pointer; font-weight: 600; font-family: var(--font-head); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-menu { display: none; } /* Aquí iría el menú hamburguesa con JS */
  .grid-3 { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
}