:root {
    color-scheme: dark;
    --bg: #0d0f12;
    --surface: #151922;
    --surface-2: #1e2430;
    --text: #f7fafc;
    --muted: #b2bfcb;
    --line: rgba(255, 255, 255, 0.13);
    --accent: #2dd4bf;
    --accent-strong: #99f6e4;
    --warm: #f97316;
    --blue: #60a5fa;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
    --radius: 8px;
    --container: 1180px;
    --header-height: 74px;
}

:root[data-theme="light"] {
    color-scheme: light;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-2: #eef3f8;
    --text: #111827;
    --muted: #596579;
    --line: rgba(17, 24, 39, 0.12);
    --accent: #0f766e;
    --accent-strong: #115e59;
    --warm: #ea580c;
    --blue: #2563eb;
    --shadow: 0 24px 70px rgba(17, 24, 39, 0.13);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    min-height: 100vh;
    background:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        var(--bg);
    background-size: 42px 42px, 42px 42px, auto;
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

:root[data-theme="light"] body {
    background:
        linear-gradient(rgba(17, 24, 39, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(17, 24, 39, 0.045) 1px, transparent 1px),
        var(--bg);
    background-size: 42px 42px, 42px 42px, auto;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent), transparent 86%), transparent 42%),
        linear-gradient(315deg, color-mix(in srgb, var(--warm), transparent 90%), transparent 36%);
}

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

button,
input,
textarea {
    font: inherit;
}

button {
    color: inherit;
}

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

:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent), white 18%);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    left: 1rem;
    top: 1rem;
    z-index: 20;
    transform: translateY(-160%);
    border-radius: var(--radius);
    background: var(--text);
    color: var(--bg);
    padding: 0.75rem 1rem;
    transition: transform 180ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.scroll-progress {
    position: fixed;
    inset: 0 0 auto;
    z-index: 30;
    height: 3px;
    background: transparent;
}

.scroll-progress span {
    display: block;
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--warm));
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 15;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg), transparent 12%);
    backdrop-filter: blur(18px);
}

.site-nav {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 1rem;
    align-items: center;
    min-height: var(--header-height);
    width: min(var(--container), calc(100% - 2rem));
    margin: 0 auto;
}

.brand {
    display: inline-flex;
    gap: 0.7rem;
    align-items: center;
    font-weight: 900;
}

.brand span {
    display: grid;
    width: 2.7rem;
    height: 2.7rem;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--accent-strong);
    letter-spacing: 0.04em;
}

.brand small {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 0.35rem;
    justify-content: center;
    list-style: none;
}

.nav-link,
.language-link,
.filter-button {
    border-radius: var(--radius);
    transition: background 180ms ease, color 180ms ease, transform 180ms ease, border-color 180ms ease;
}

.nav-link {
    display: inline-flex;
    min-height: 2.35rem;
    align-items: center;
    padding: 0 0.82rem;
    color: var(--muted);
    font-weight: 800;
}

.nav-link:hover,
.nav-link.is-active {
    background: var(--surface);
    color: var(--text);
}

.nav-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.language-link {
    display: inline-flex;
    min-height: 2.35rem;
    align-items: center;
    border: 1px solid var(--line);
    padding: 0 0.85rem;
    color: var(--text);
    font-weight: 900;
}

.language-link:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
}

.theme-toggle,
.nav-toggle {
    display: inline-grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    cursor: pointer;
}

.theme-toggle {
    width: 2.35rem;
    height: 2.35rem;
}

.theme-toggle span {
    position: relative;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: inset -0.28rem -0.28rem 0 color-mix(in srgb, var(--surface), black 18%);
}

:root[data-theme="light"] .theme-toggle span {
    box-shadow: 0 0 0 0.28rem color-mix(in srgb, var(--warm), transparent 75%);
}

.nav-toggle {
    display: none;
    width: 2.45rem;
    height: 2.45rem;
}

.nav-toggle span {
    display: block;
    width: 1.1rem;
    height: 2px;
    border-radius: 999px;
    background: var(--text);
    transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle span + span {
    margin-top: 0.23rem;
}

.site-header.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}

.site-header.is-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

.site-header.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
}

.hero {
    position: relative;
    display: grid;
    min-height: calc(100vh - var(--header-height));
    align-items: end;
    overflow: clip;
    isolation: isolate;
    background-image:
        linear-gradient(90deg, rgba(13, 15, 18, 0.95) 0%, rgba(13, 15, 18, 0.82) 48%, rgba(13, 15, 18, 0.35) 72%, rgba(13, 15, 18, 0.18) 100%),
        url("../img/porfile.jpg");
    background-position: center, right center;
    /* foto cuadrada 600x600: llena la altura del hero y recorta lados */
    background-size: cover, auto 100%;
    background-repeat: no-repeat;
}

:root[data-theme="light"] .hero {
    background-image:
        linear-gradient(90deg, rgba(245, 247, 251, 0.96) 0%, rgba(245, 247, 251, 0.86) 50%, rgba(245, 247, 251, 0.38) 78%, rgba(245, 247, 251, 0.18) 100%),
        url("../img/porfile.jpg");
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    z-index: -1;
    height: 34%;
    background: linear-gradient(0deg, var(--bg), transparent);
}

.hero-content {
    width: min(var(--container), calc(100% - 2rem));
    margin: 0 auto;
    padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.eyebrow,
.project-meta {
    color: var(--accent-strong);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 10ch;
    margin-top: 0.45rem;
    font-size: clamp(3.4rem, 11vw, 8.2rem);
    line-height: 0.88;
    letter-spacing: 0;
}

.hero-subtitle {
    max-width: 720px;
    margin-top: 1.25rem;
    color: var(--muted);
    font-size: clamp(1.08rem, 2.2vw, 1.5rem);
}

.hero-rotator {
    min-height: 2rem;
    margin-top: 1rem;
    color: var(--text);
    font-weight: 900;
}

#role-rotator {
    display: inline-block;
    transition: opacity 220ms ease, transform 220ms ease;
}

#role-rotator.is-changing {
    opacity: 0;
    transform: translateY(0.4rem);
}

.hero-actions,
.contact-actions,
.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-actions {
    margin-top: 1.6rem;
}

.button {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius);
    padding: 0.72rem 1.05rem;
    cursor: pointer;
    font-weight: 900;
    transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    background: var(--text);
    color: var(--bg);
}

.button-secondary {
    border-color: var(--line);
    background: color-mix(in srgb, var(--surface), transparent 14%);
    color: var(--text);
}

.button-secondary:hover {
    border-color: var(--accent);
}

.hero-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.6rem;
}

.hero-facts div {
    min-width: 9.8rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface), transparent 22%);
    padding: 0.8rem 0.95rem;
}

.hero-facts dt {
    color: var(--muted);
    font-size: 0.75rem;
    font-weight: 900;
    text-transform: uppercase;
}

.hero-facts dd {
    margin-top: 0.2rem;
    font-weight: 900;
}

.section {
    width: min(var(--container), calc(100% - 2rem));
    margin: 0 auto;
    padding: clamp(4rem, 8vw, 7rem) 0;
}

.surface-band {
    width: 100%;
    max-width: none;
    border-block: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface), transparent 32%);
    padding-inline: max(1rem, calc((100% - var(--container)) / 2));
}

.section-header {
    max-width: 780px;
    margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.section-header h2 {
    margin-top: 0.35rem;
    font-size: clamp(2rem, 5vw, 4.1rem);
    line-height: 1;
    letter-spacing: 0;
}

.about-grid,
.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
    gap: clamp(1rem, 4vw, 2rem);
    align-items: start;
}

.about-copy {
    display: grid;
    gap: 1rem;
    color: var(--muted);
    font-size: 1.08rem;
}

.impact-list {
    display: grid;
    gap: 0.85rem;
}

.impact-list article,
.stack-card,
.process-step,
.contact-form,
.project-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface), transparent 5%);
    box-shadow: var(--shadow);
}

.impact-list article,
.stack-card,
.process-step {
    padding: 1rem;
}

.impact-list span,
.process-step span {
    color: var(--warm);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.impact-list h3,
.stack-card h3,
.process-step h3,
.project-card h3 {
    margin-top: 0.3rem;
    font-size: 1.2rem;
}

.impact-list p,
.stack-card p,
.process-step p,
.project-card p,
.contact-copy p {
    color: var(--muted);
}

.stack-grid,
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.stack-card,
.process-step {
    transition: transform 180ms ease, border-color 180ms ease;
}

.stack-card:hover,
.process-step:hover {
    border-color: color-mix(in srgb, var(--accent), var(--line));
    transform: translateY(-3px);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 1rem;
}

.tag-list span {
    border: 1px solid var(--line);
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent), transparent 88%);
    color: var(--accent-strong);
    padding: 0.36rem 0.62rem;
    font-size: 0.8rem;
    font-weight: 900;
}

.project-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-bottom: 1rem;
}

.filter-button {
    min-height: 2.5rem;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface), transparent 8%);
    padding: 0 0.95rem;
    cursor: pointer;
    font-weight: 900;
}

.filter-button:hover,
.filter-button.is-active {
    border-color: transparent;
    background: var(--text);
    color: var(--bg);
    transform: translateY(-1px);
}

.projects-grid {
    display: grid;
    gap: 1rem;
}

.project-card {
    display: grid;
    grid-template-columns: minmax(260px, 0.74fr) minmax(0, 1fr);
    overflow: hidden;
    transition: opacity 220ms ease, transform 220ms ease, border-color 180ms ease;
}

.project-card:hover {
    border-color: color-mix(in srgb, var(--accent), var(--line));
    transform: translateY(-3px);
}

.project-card.is-hidden {
    display: none;
}

.project-card figure {
    min-height: 100%;
    background: var(--surface-2);
}

.project-card img {
    width: 100%;
    height: 100%;
    min-height: 18rem;
    object-fit: cover;
    transition: transform 380ms ease, filter 380ms ease;
}

.project-card:hover img {
    filter: saturate(1.08) contrast(1.04);
    transform: scale(1.025);
}

.project-content {
    display: grid;
    gap: 0.9rem;
    padding: clamp(1.1rem, 3vw, 1.45rem);
}

.project-card h3 {
    font-size: clamp(1.45rem, 3vw, 2rem);
    line-height: 1.05;
}

.project-points {
    display: grid;
    gap: 0.35rem;
    padding-left: 1.1rem;
    color: var(--muted);
}

.project-points li::marker {
    color: var(--accent);
}

.project-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: end;
    justify-content: space-between;
    margin-top: auto;
}

.project-links a,
.social-list a {
    display: inline-flex;
    min-height: 2.45rem;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0 0.85rem;
    font-weight: 900;
    transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.project-links a:hover,
.social-list a:hover {
    border-color: transparent;
    background: var(--text);
    color: var(--bg);
    transform: translateY(-2px);
}

.contact-section {
    padding-bottom: clamp(4rem, 8vw, 6rem);
}

.contact-copy {
    display: grid;
    gap: 1.2rem;
}

.social-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    list-style: none;
}

.contact-form {
    display: grid;
    gap: 0.9rem;
    padding: clamp(1rem, 3vw, 1.3rem);
}

.contact-form label {
    display: grid;
    gap: 0.4rem;
}

.contact-form span {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--bg), transparent 20%);
    color: var(--text);
    padding: 0.88rem 0.95rem;
    resize: vertical;
    transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
    background: var(--surface);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent), transparent 85%);
    outline: 0;
}

.site-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--line);
    padding: 1.2rem max(1rem, calc((100% - var(--container)) / 2));
    color: var(--muted);
}

.site-footer p:first-child {
    color: var(--text);
    font-weight: 900;
}

.js .reveal-section {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 620ms ease, transform 620ms ease;
}

.js .reveal-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1040px) {
    .stack-grid,
    .process-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .project-card {
        grid-template-columns: 1fr;
    }

    .project-card img {
        aspect-ratio: 16 / 9;
        min-height: 0;
    }
}

@media (max-width: 860px) {
    .site-nav {
        grid-template-columns: auto auto auto;
    }

    .nav-toggle {
        display: inline-grid;
        justify-self: end;
    }

    .nav-links {
        position: fixed;
        inset: var(--header-height) 1rem auto;
        display: grid;
        justify-content: stretch;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--surface);
        box-shadow: var(--shadow);
        padding: 0.5rem;
        transform: translateY(-0.8rem);
        opacity: 0;
        pointer-events: none;
        transition: opacity 180ms ease, transform 180ms ease;
    }

    .site-header.is-open .nav-links {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-link {
        justify-content: center;
    }

    .nav-actions {
        justify-self: end;
    }

    .hero {
        min-height: auto;
        background-size: cover, auto 82%;
        background-position: center, right top;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .site-nav {
        width: min(100% - 1rem, var(--container));
    }

    .brand small {
        display: none;
    }

    .hero {
        background-image:
            linear-gradient(180deg, rgba(13, 15, 18, 0.72) 0%, rgba(13, 15, 18, 0.96) 58%, rgba(13, 15, 18, 1) 100%),
            url("../img/porfile.jpg");
        background-size: cover, 100% auto;
        background-position: center, center top;
    }

    :root[data-theme="light"] .hero {
        background-image:
            linear-gradient(180deg, rgba(245, 247, 251, 0.6) 0%, rgba(245, 247, 251, 0.96) 58%, rgba(245, 247, 251, 1) 100%),
            url("../img/porfile.jpg");
    }

    .hero-content {
        padding-top: 18rem;
    }

    .hero h1 {
        font-size: clamp(3.2rem, 18vw, 5.2rem);
    }

    .hero-facts,
    .hero-actions,
    .contact-actions,
    .project-links {
        flex-direction: column;
    }

    .button,
    .project-links a,
    .hero-facts div {
        width: 100%;
    }

    .stack-grid,
    .process-grid {
        grid-template-columns: 1fr;
    }

    .section {
        width: min(100% - 1rem, var(--container));
    }

    .surface-band {
        padding-inline: 0.5rem;
    }

    .section-header h2 {
        font-size: clamp(2rem, 12vw, 3rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .js .reveal-section {
        opacity: 1;
        transform: none;
    }
}

/* Products section (featured SaaS / client platforms) */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.product-card {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    padding: clamp(1.1rem, 3vw, 1.45rem);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface), transparent 5%);
    box-shadow: var(--shadow);
    transition: transform 180ms ease, border-color 180ms ease;
}

.product-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent), var(--line));
}

.product-badge {
    align-self: flex-start;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.72rem;
    font-weight: 900;
    color: var(--accent-strong);
    border: 1px solid var(--line);
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent), transparent 88%);
    padding: 0.3rem 0.62rem;
}

.product-card h3 {
    margin-top: 0.2rem;
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.05;
}

.product-card p {
    color: var(--muted);
}

.product-links {
    margin-top: auto;
}

.product-links a {
    display: inline-flex;
    min-height: 2.45rem;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0 0.9rem;
    font-weight: 900;
    transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.product-links a:hover {
    border-color: transparent;
    background: var(--text);
    color: var(--bg);
    transform: translateY(-2px);
}

.product-links a[aria-disabled="true"] {
    opacity: 0.55;
    pointer-events: none;
}

/* Secondary academic projects (collapsible) */
.academic-projects {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface), transparent 6%);
    padding: 0.4rem clamp(1rem, 3vw, 1.4rem);
}

.academic-projects > summary {
    cursor: pointer;
    list-style: none;
    padding: 0.9rem 0;
    font-weight: 900;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.academic-projects > summary::-webkit-details-marker {
    display: none;
}

.academic-projects > summary::after {
    content: "+";
    color: var(--accent);
    font-size: 1.4rem;
    line-height: 1;
}

.academic-projects[open] > summary::after {
    content: "\2212";
}

.academic-list {
    display: grid;
    gap: 0.7rem;
    padding: 0.4rem 0 1rem;
    list-style: none;
}

.academic-list li {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.9rem;
    align-items: baseline;
    justify-content: space-between;
    padding: 0.7rem 0;
    border-top: 1px solid var(--line);
}

.academic-list h3 {
    font-size: 1.05rem;
}

.academic-list p {
    color: var(--muted);
    flex: 1 1 16rem;
    min-width: 12rem;
}

.academic-list a {
    font-weight: 900;
    color: var(--accent-strong);
    white-space: nowrap;
}

@media (max-width: 1040px) {
    .products-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}