/* ================= Base ================= */
:root {
    color-scheme: dark;
    --azul: #2575fc;
    --morado: #6a11cb;
    --turquesa: #00c9a7;
    --amarillo: #ffe259;
    --rosa: #ff2d95;
    --texto: #eef2ff;
    --fondo: #0b1026;
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

html {
    background: var(--fondo);
}

html, body {
    color: #fff;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

body {
    margin: 0;
    background: linear-gradient(160deg, #6a11cb 0%, #2575fc 50%, #00c9a7 100%) fixed;
}

/* Portada: degradados suaves en vez del degradado plano */
body:not(.on) {
    background:
        radial-gradient(60% 40% at 12% 0%, rgba(124, 58, 237, .6), transparent 70%),
        radial-gradient(50% 40% at 100% 18%, rgba(0, 201, 167, .45), transparent 70%),
        radial-gradient(70% 50% at 50% 100%, rgba(37, 117, 252, .55), transparent 70%),
        var(--fondo);
    background-attachment: fixed;
    min-height: 100vh;
}

main {
    position: relative;
    z-index: 2;
    max-width: 560px;
    margin: 0 auto;
    padding: calc(env(safe-area-inset-top, 0px) + 16px) 16px calc(env(safe-area-inset-bottom, 0px) + 16px);
}

p {
    color: var(--texto);
    margin: 4px 0 14px;
    font-size: 15px;
}

a {
    color: #ffe259;
}

button {
    width: 100%;
    min-height: 48px;
    padding: 14px;
    font-size: 17px;
    font-family: inherit;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(90deg, #d63a12, #b8420a);
    box-shadow: 0 8px 20px rgba(0, 0, 0, .3);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

button:disabled {
    opacity: .6;
    cursor: progress;
}

button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
    outline: 3px solid var(--amarillo);
    outline-offset: 2px;
}

/* Utilidad para lectores de pantalla */
.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;
}

/* Aviso de carga de datos */
#cargando {
    font-size: 14px;
    line-height: 1.4;
    margin: 0 auto 12px;
    max-width: 34ch;
    color: #dfe6ff;
    opacity: .9;
}

#cargando.mal {
    color: #fff;
    background: rgba(185, 28, 28, .55);
    border: 1px solid #fecaca;
    border-radius: 12px;
    padding: 8px 12px;
    opacity: 1;
}

.creditos {
    font-size: 11px;
    line-height: 1.5;
    color: #dfe6ff;
    opacity: .75;
    margin: 14px 0 0;
    text-align: center;
}

.creditos a {
    color: #ffe259;
    text-decoration: underline;
}

noscript p {
    background: rgba(185, 28, 28, .6);
    border: 1px solid #fecaca;
    border-radius: 12px;
    padding: 12px;
}