:root {
    --bg: #070709;
    --bg-soft: #10141b;
    --panel: rgba(18, 24, 31, 0.82);
    --panel-strong: rgba(11, 16, 24, 0.95);
    --text: #E7F8EE;
    --brand: #b6b3d9;
    --muted: #A8AEC1;
    --accent: #BFFFBC;
    --accent-strong: #8ce4ff;
    --success: #B5D2CB;
    --focus: #FFD166;
    --border: rgba(255,255,255,0.08);

    --max-width: 1100px;
    --container-pad: 24px;
    --read-width: 78ch;
    --radius: 18px;
    --shadow: 0 20px 50px rgba(0,0,0,0.45);
    --transition: 220ms ease;
    --font-stack: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --base-font-size: 16px;
}

/* reset */
*, *::before, *::after { box-sizing: border-box; }
html {
    min-height: 100%;
    background: var(--bg);
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at top, rgba(146, 113, 255, 0.18), transparent 30%),
        radial-gradient(circle at bottom right, rgba(73, 196, 255, 0.12), transparent 30%),
        var(--bg);
    background-attachment: scroll;
    color: var(--text);
    font-family: var(--font-stack);
    font-size: var(--base-font-size);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-inline: var(--container-pad);
}

/* utilidades */
.hidden { display: none !important; }
.sr-only {
    position: absolute !important;
    width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.center { text-align: center; }
.shadow { box-shadow: var(--shadow); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.03); }
.full-width { width: 100%; }

/* contenedor principal centrado */
#container {
    width: 100%;
    max-width: var(--max-width);
    margin: 32px auto;
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    align-items: center; /* centra bloques hijos */
    gap: 22px;
    box-sizing: border-box;
}

/* bloque de lectura centrado visualmente */
.content-wrapper {
    margin: 0 auto;
    width: 100%;
    max-width: var(--read-width);
    padding-inline: 16px;
    text-align: center;
    box-sizing: border-box;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(180px, 0.8fr);
    align-items: center;
    gap: 24px;
    background: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 28px;
}

.hero-copy {
    text-align: left;
}

.hero-copy .content {
    margin-top: 18px;
    font-size: 1.05rem;
    color: rgba(231,248,238,0.9);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-shell {
    position: relative;
    width: min(260px, 100%);
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(191,255,188,0.08), rgba(140,228,255,0.12));
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 30px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 25px 60px rgba(0,0,0,0.4);
}

.avatar-shell::before {
    content: "";
    position: absolute;
    inset: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 24px;
}

/* párrafos mantienen lectura a la izquierda pero el bloque está centrado */
.content-wrapper p {
    text-align: left;
    color: rgba(231,248,238,0.96);
    font-size: 1rem;
}

/* tipografía más grande y clara */
h1, h2, h3, h4 { color: var(--brand); font-weight: 800; margin: 0 0 12px 0; }
h1.title { font-size: clamp(2.1rem, 4vw, 3.2rem); line-height: 1.12; margin-bottom: 8px; }
h2 { font-size: 1.7rem; }
.title { display: block; }

/* enlaces */
a, a:visited {
    color: var(--brand);
    text-decoration: none;
    transition: color var(--transition), transform var(--transition);
}
a:hover, a:focus { color: var(--accent); transform: translateY(-2px); outline: none; }
a:focus-visible { box-shadow: 0 0 0 5px rgba(255,209,102,0.10); border-radius: 6px; }

/* navegación superior centrada y con más espacio */
#top-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    border-bottom: 1px solid rgba(165,210,200,0.06);
    padding: 12px 0 18px 0;
    gap: 12px;
}
#top-nav > ul {
    display: flex;
    gap: 12px;
    align-items: center;
    margin: 0; padding: 0;
    list-style: none;
    justify-content: center;
    width: auto;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px;
}
#top-nav a {
    display: inline-block;
    padding: 10px 14px;
    color: var(--muted);
    border-radius: 999px;
    transition: background-color var(--transition), color var(--transition), transform var(--transition);
    font-weight: 600;
}
#top-nav a.active,
#top-nav a:hover { background: rgba(191, 255, 188, 0.08); color: var(--accent); transform: translateY(-2px); }

/* foto de perfil centrada */
.profile-picture {
    width: 90%;
    height: 90%;
    border-radius: 24px;
    object-fit: cover;
    border: 1px solid rgba(255,255,255,0.06);
    display: block;
    margin: 0 auto;
}

/* tarjetas y bloques reutilizables más grandes */
.card {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.005));
    padding: 18px;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.06);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    width: 100%;
}
.card:hover { transform: translateY(-8px); box-shadow: 0 22px 48px rgba(0,0,0,0.55); border-color: rgba(191,255,188,0.2); }

.projects-section {
    width: 100%;
    margin: 18px 0 8px;
    text-align: left;
}

.section-heading {
    margin-bottom: 18px;
    text-align: center;
}

.eyebrow {
    margin: 0 0 6px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 700;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.project-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    text-align: left;
    min-height: 220px;
}

.project-card h3 {
    margin: 12px 0 10px;
    font-size: 1.25rem;
    color: var(--text);
}

.project-card p {
    margin: 0 0 16px;
    color: rgba(231,248,238,0.8);
}

.project-type {
    display: inline-flex;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(191, 255, 188, 0.08);
    color: var(--accent);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 700;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tag-list span {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.74rem;
    padding: 6px 10px;
}

.project-link {
    display: inline-block;
    margin-top: auto;
    color: var(--accent);
    font-weight: 700;
}

.certifications-section {
    width: 100%;
    margin: 28px 0 10px;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 18px;
}

.certification-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 200px;
}

.cert-label {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 700;
}

.cert-image {
    width: 100%;
    min-height: 150px;
    border-radius: 16px;
    border: 1px dashed rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.02);
    display: grid;
    place-items: center;
    color: var(--muted);
    text-align: center;
    padding: 14px;
    font-size: 0.9rem;
}

.cert-svg {
    width: 100%;
    max-width: 180px;
    height: auto;
    display: block;
    margin: 0 auto;
    filter: drop-shadow(0 12px 20px rgba(0,0,0,0.2));
}

.placeholder-image {
    background: linear-gradient(135deg, rgba(191,255,188,0.04), rgba(140,228,255,0.04));
}

/* sociales y pie */
.socials {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 30px 0 10px;
}

.socials a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.02);
    color: var(--text);
    font-weight: 700;
    font-family: "Fira Mono", monospace;
    transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.socials a:hover {
    background: rgba(191,255,188,0.08);
    border-color: rgba(191,255,188,0.18);
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-socials {
    justify-content: flex-start;
    margin: 18px 0 0;
}

.footer {
    text-align: center;
    font-size: 14px;
    color: rgba(231,248,238,0.75);
    margin: 20px 0 30px;
    padding: 14px 0 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}
.highlight{
    color: var(--accent);
    font-weight: 600;
}
/* accesibilidad: texto mayor en pantallas pequeñas y suficiente padding */
@media (max-width: 900px) {
    :root { --container-pad: 20px; }
    body { padding-inline: calc(var(--container-pad)); }
    #container { margin: 22px auto; padding: 16px 0; gap: 16px; }
    .content-wrapper { padding-inline: 12px; max-width: 90ch; }
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 22px 18px;
    }
    .hero-copy { text-align: center; }
    h1.title { font-size: 2.2rem; }
    .avatar-shell { width: min(220px, 85%); }
}

/* móvil: más grande y con espacio lateral */
@media (max-width: 650px) {
    :root { --container-pad: 14px; --base-font-size: 15px; }
    body { padding-inline: calc(var(--container-pad) * 0.9); font-size: 15px; }
    #container { margin: 16px auto; padding: 12px 0; gap: 12px; }
    .content-wrapper { padding-inline: 10px; max-width: 100%; text-align: center; }
    .content-wrapper p { text-align: left; font-size: 0.98rem; }
    #top-nav { flex-direction: column; gap: 10px; }
    #top-nav > ul { flex-wrap: wrap; gap: 8px; }
    .profile-picture { width: 90%; height: 90%; }
    .socials a { width: 100%; }
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}