/* ===== Base ===== */
:root {
    --primary: #c7f014;
    --primary-ink: #111;
    --ink: #1b1b1b;
    --muted: #6a6a6a;
    --bg: #ffffff;
    --bg-alt: #f6f6f6;
    --card: #fff;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(0, 0, 0, .08);
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 84px
}

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    
}

/* Titulos y utilitarios */
h1,
h2,
h3 {
    margin: 0 0 .5rem;
    line-height: 1.15
}

h2 {
    font-size: clamp(1.6rem, 1.6vw+1rem, 2.2rem);
    font-weight: 800
}

h3 {
    font-size: clamp(1.1rem, 1vw+1rem, 1.6rem);
    font-weight: 800
}

p {
    margin: 0 0 1rem;
    color: #2a2a2a
}

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

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

ul {
    margin: 0;
    padding: 0;
    list-style: none
}

/* Contenedor global */
.contenedor {
    width: 100%;
    margin: 0 auto;
    background: var(--bg);
}

/* Secciones */
section {
    padding: clamp(2rem, 4vw, 4rem) clamp(1rem, 3vw, 2rem)
}

section h2 {
    text-align: center;
    margin-bottom: 1.5rem
}

/* Botón subir */
.btn-subir {
    position: fixed;
    right: 18px;
    bottom: 86px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: #000;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 18px rgba(0, 0, 0, .25);
    z-index: 90
}

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

/* Layout amplio para 1920 */
@media (min-width:1600px) {
    section {
        padding-left: clamp(2rem, 6vw, 6rem);
        padding-right: clamp(2rem, 6vw, 6rem)
    }
}