:root {
    --text-color: rgb(236, 241, 245);
    --title-color: rgb(195, 250, 44);
    --accent-color: rgb(255, 35, 122);
    --secondary-color: rgb(252, 254, 255);
    --title-font: "Oswald", sans-serif;
    --text-font: "adapter-mono-pe-variable", sans-serif;
    --surface: rgba(18, 22, 28, 0.52);
    --surface-strong: rgba(18, 22, 28, 0.66);
    --border-soft: rgba(255, 255, 255, 0.14);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background-image: url("../img/foto-background.png");
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    color: var(--text-color);
    font-family: var(--text-font);
    font-variation-settings: "BORD" 300, "ital" 0, "slnt" 0, "wght" 200;
    font-size: 1rem;
    line-height: 1.6;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
    background: rgba(8, 10, 14, 0.72);
    border-bottom: 1px solid var(--border-soft);
}

.site-nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 2rem;
    flex-wrap: wrap;
}

.logo {
    font-family: var(--title-font);
    color: var(--title-color);
    font-size: 1.2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.site-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.site-nav li a {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--secondary-color);
    border: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.site-nav li a:hover {
    color: var(--title-color);
    border-color: var(--title-color);
    background: rgba(195, 250, 44, 0.08);
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

h1,
h1,
h2,
h3,
h4 {
    font-family: var(--title-font);
    margin: 0;
}

h1,
h2 {
    color: var(--title-color);
}

h3 {
    color: var(--accent-color);
}

p {
    margin: 0;
}

ul,
ol {
    margin: 0;
    padding-left: 1.2rem;
}

li {
    margin-top: 0.35rem;
}

.hero,
.section {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: 18px;
    padding: 1.4rem;
}

.hero {
    display: grid;
    gap: 1.2rem;
    margin-bottom: 1.2rem;
}

.eyebrow {
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.85rem;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 4rem);
    line-height: 1;
}

.lead {
    padding: 1rem 1.1rem;
    background: var(--surface-strong);
    border-left: 3px solid var(--title-color);
    border-radius: 12px;
    max-width: 85ch;
}

.hero-cards {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
    background: rgba(9, 12, 18, 0.62);
    border: 1px solid var(--border-soft);
    border-radius: 14px;
    padding: 1rem 1.1rem;
    display: grid;
    gap: 0.6rem;
}

.card h2 {
    font-size: clamp(1.4rem, 2.2vw, 1.9rem);
}

.section {
    margin-top: 1.2rem;
    display: grid;
    gap: 1rem;
}

/* Títulos verdes (Metodología, Enfoque, Objetivos, etc.) al mismo tamaño */
.section > h2 {
    font-size: clamp(1.9rem, 2.6vw, 2.3rem);
    line-height: 1.05;
}

.grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid article,
.callout {
    background: rgba(9, 12, 18, 0.56);
    border: 1px solid var(--border-soft);
    border-radius: 14px;
    padding: 1rem 1.1rem;
}

.grid article {
    display: grid;
    gap: 0.75rem;
}

.grid article h3,
.callout h3 {
    font-size: clamp(1.3rem, 2vw, 1.7rem);
}

.grid article h4 {
    color: var(--secondary-color);
    font-size: 1.05rem;
    margin-top: 0.5rem;
}

.callout {
    display: grid;
    gap: 0.75rem;
}

.site-footer {
    padding: 1.5rem;
    text-align: center;
    color: var(--secondary-color);
    background: rgba(8, 10, 14, 0.7);
    border-top: 1px solid var(--border-soft);
}

@media (max-width: 700px) {
    .site-nav {
        padding: 0.8rem 1rem;
    }

    main {
        padding: 1.2rem 1rem 3rem;
    }

    .hero,
    .section {
        padding: 1rem;
    }
}