/* ==========================================================================
   portfolio.css — Rafael Medina
   Consultoría técnica: base sobria, detalles de ingeniería.
   Sans para leer, monoespaciado solo en etiquetas y datos.
   Sin dependencias, sin fuentes remotas.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   El tema claro es el base (es lo que espera un cliente corporativo).
   El oscuro entra por preferencia del sistema o por el interruptor.
   -------------------------------------------------------------------------- */

:root {
    color-scheme: light;

    --paper:    #ffffff;
    --paper-2:  #f4f7fa;

    --ink:      #0f1d37;   /* navy de card.jpg */
    --ink-2:    #3d4a63;
    --ink-3:    #5f6b82;
    --ink-4:    #7f8ca2;

    --rule:        #e1e7ef;
    --rule-strong: #c6cede;

    --accent:      #0a5f7d;   /* teal de card.jpg, elevado para contraste */
    --accent-2:    #033649;   /* teal exacto de card.jpg */
    --accent-ink:  #ffffff;
    --accent-soft: #ecf4f8;
    --accent-line: #b5d3df;

    --shadow: 0 1px 2px rgba(15, 29, 55, .05), 0 12px 28px rgba(15, 29, 55, .07);

    --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
            "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
            "Liberation Mono", "Courier New", monospace;

    --container: 1220px;
    --measure: 66ch;
    --head-h: 69px;
    --label-col: 190px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;

        --paper:    #091223;
        --paper-2:  #0f1d37;   /* navy de card.jpg como superficie */

        --ink:      #eff3f9;
        --ink-2:    #b8c3d5;
        --ink-3:    #8794aa;
        --ink-4:    #64718a;

        --rule:        #1c2a44;
        --rule-strong: #33415e;

        --accent:      #4fb8d8;
        --accent-2:    #74cbe8;
        --accent-ink:  #04141c;
        --accent-soft: #0d2635;
        --accent-line: #1d4a5f;

        --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 14px 32px rgba(0, 0, 0, .4);
    }
}

:root[data-theme="dark"] {
    color-scheme: dark;

    --paper:    #091223;
    --paper-2:  #0f1d37;   /* navy de card.jpg como superficie */

    --ink:      #eff3f9;
    --ink-2:    #b8c3d5;
    --ink-3:    #8794aa;
    --ink-4:    #64718a;

    --rule:        #1c2a44;
    --rule-strong: #33415e;

    --accent:      #4fb8d8;
    --accent-2:    #74cbe8;
    --accent-ink:  #04141c;
    --accent-soft: #0d2635;
    --accent-line: #1d4a5f;

    --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 14px 32px rgba(0, 0, 0, .4);
}

/* --------------------------------------------------------------------------
   2. RESET
   -------------------------------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .001ms !important;
        transition-duration: .001ms !important;
    }
}

body {
    background: var(--paper);
    color: var(--ink-2);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

h1, h2, h3, h4 {
    color: var(--ink);
    font-weight: 660;
    line-height: 1.18;
    letter-spacing: -.018em;
}

::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

.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;
}

.skip {
    position: absolute;
    top: -200px; left: 16px;
    z-index: 300;
    padding: 12px 18px;
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 600;
    font-size: 14px;
}

.skip:focus { top: 14px; }

.container {
    width: min(var(--container), calc(100% - 56px));
    margin-inline: auto;
}

/* --------------------------------------------------------------------------
   3. TIPOGRAFÍA DE APOYO
   -------------------------------------------------------------------------- */

/* La etiqueta monoespaciada es la firma técnica de todo el sitio. */
.mono-label {
    font-family: var(--mono);
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.lede {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--ink-2);
    max-width: var(--measure);
}

.tick::before {
    content: "";
    display: inline-block;
    width: 7px; height: 7px;
    margin-right: 9px;
    background: var(--accent);
    vertical-align: 1px;
}

/* --------------------------------------------------------------------------
   4. CABECERA
   -------------------------------------------------------------------------- */

.masthead {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--paper);
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    backdrop-filter: saturate(1.4) blur(12px);
    border-bottom: 1px solid var(--rule);
}

.masthead-in {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 68px;
    padding-block: 10px;
}

.brand { display: flex; align-items: center; gap: 12px; flex: none; }

.brand-mark {
    display: grid;
    place-content: center;
    width: 36px; height: 36px;
    flex: none;
    border: 1.5px solid var(--ink);
    color: var(--ink);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-name {
    color: var(--ink);
    font-weight: 660;
    font-size: 15px;
    letter-spacing: -.01em;
}

.brand-role {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.mainnav { display: flex; align-items: center; gap: 4px; margin-left: auto; }

.mainnav a {
    position: relative;
    padding: 8px 13px;
    font-size: 14.5px;
    color: var(--ink-2);
    white-space: nowrap;
    transition: color .15s;
}

.mainnav a::after {
    content: "";
    position: absolute;
    left: 13px; right: 13px; bottom: 2px;
    height: 1.5px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .18s ease;
}

.mainnav a:hover, .mainnav a:focus-visible { color: var(--ink); }
.mainnav a:hover::after { transform: scaleX(1); }

.masthead-actions { display: flex; align-items: center; gap: 10px; flex: none; }

.theme-toggle {
    display: grid;
    place-content: center;
    width: 36px; height: 36px;
    border: 1px solid var(--rule-strong);
    color: var(--ink-2);
    transition: border-color .15s, color .15s;
}

.theme-toggle:hover { border-color: var(--ink-3); color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; }

:root[data-theme="dark"] .icon-moon,
:root[data-theme="light"] .icon-sun { display: none; }

/* Sin JS el atributo no existe: se decide por preferencia del sistema. */
:root:not([data-theme]) .icon-sun { display: none; }

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .icon-sun { display: block; }
    :root:not([data-theme]) .icon-moon { display: none; }
}

/* --------------------------------------------------------------------------
   5. BOTONES
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 46px;
    padding: 0 22px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 560;
    letter-spacing: -.005em;
    white-space: nowrap;
    transition: background .15s, border-color .15s, color .15s;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
}

.btn-primary:hover, .btn-primary:focus-visible { background: var(--accent-2); border-color: var(--accent-2); }

.btn-ghost { border-color: var(--rule-strong); color: var(--ink); }
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: var(--ink); background: var(--paper-2); }

.btn-sm { min-height: 38px; padding: 0 16px; font-size: 14px; }

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-weight: 560;
    font-size: 15px;
}

.link-arrow::after { content: "→"; transition: transform .16s ease; }
.link-arrow:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   6. ESTRUCTURA DE SECCIÓN
   Columna izquierda fija con el número y el nombre; contenido a la derecha.
   -------------------------------------------------------------------------- */

.sec {
    border-top: 1px solid var(--rule);
    padding-block: 92px;
    scroll-margin-top: var(--head-h);
}

.sec-tinted { background: var(--paper-2); }

.sec-grid {
    display: grid;
    grid-template-columns: var(--label-col) minmax(0, 1fr);
    gap: 0 60px;
}

.sec-label {
    position: sticky;
    top: calc(var(--head-h) + 32px);
    align-self: start;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-top: 6px;
}

.sec-num {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .1em;
    color: var(--accent);
}

.sec-name {
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.sec-label::before {
    content: "";
    width: 26px;
    height: 2px;
    background: var(--accent);
    margin-bottom: 12px;
}

.sec-body > h2 {
    font-size: clamp(1.7rem, 3.1vw, 2.4rem);
    max-width: 22ch;
    margin-bottom: 18px;
}

.sec-body > .lede { margin-bottom: 48px; }

/* --------------------------------------------------------------------------
   7. PORTADA
   -------------------------------------------------------------------------- */

.hero { padding: 92px 0 0; }

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 316px;
    gap: 64px;
    align-items: start;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    padding: 6px 14px 6px 12px;
    border: 1px solid var(--accent-line);
    background: var(--accent-soft);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--accent);
}

.pulse {
    width: 7px; height: 7px;
    flex: none;
    border-radius: 50%;
    background: var(--accent);
}

@media (prefers-reduced-motion: no-preference) {
    .pulse { animation: pulse 2.4s ease-in-out infinite; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: .35; }
}

.hero h1 {
    font-size: clamp(2.3rem, 5.4vw, 3.9rem);
    line-height: 1.04;
    letter-spacing: -.032em;
    max-width: 17ch;
    margin-bottom: 26px;
}

.hero h1 em { font-style: normal; color: var(--accent); }

.hero-lede {
    font-size: clamp(1.05rem, 1.5vw, 1.2rem);
    line-height: 1.6;
    color: var(--ink-2);
    max-width: 58ch;
    margin-bottom: 38px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.hero-note {
    margin-top: 26px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: .04em;
    color: var(--ink-3);
}

/* Ficha lateral: los datos duros, presentados como una hoja de especificación */
.spec {
    border: 1px solid var(--rule);
    background: var(--paper);
    box-shadow: var(--shadow);
}

.spec-hd {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-2);
}

.spec dl { padding: 6px 18px 16px; }

.spec dl > div {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 0 14px;
    padding: 11px 0;
    border-bottom: 1px solid var(--rule);
}

.spec dl > div:last-child { border-bottom: 0; }

.spec dt {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding-top: 3px;
}

.spec dd { color: var(--ink); font-size: 14.5px; font-weight: 500; }

/* --------------------------------------------------------------------------
   8. BANDA DE INDICADORES
   -------------------------------------------------------------------------- */

.kpis {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 84px;
    border-top: 1px solid var(--rule);
}

.kpi { padding: 30px 28px 34px; border-left: 1px solid var(--rule); }
.kpi:first-child { border-left: 0; padding-left: 0; }

.kpi-num {
    display: block;
    font-family: var(--mono);
    font-size: clamp(2rem, 3.4vw, 2.9rem);
    font-weight: 600;
    line-height: 1;
    letter-spacing: -.03em;
    color: var(--ink);
    margin-bottom: 12px;
}

.kpi-num sup { font-size: .45em; vertical-align: super; color: var(--accent); }

.kpi-label { font-size: 14px; color: var(--ink-3); line-height: 1.45; }

/* --------------------------------------------------------------------------
   9. FRANJA DE CONTEXTOS
   -------------------------------------------------------------------------- */

.contexts {
    border-top: 1px solid var(--rule);
    background: var(--paper-2);
    padding-block: 34px;
}

.contexts-in {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 40px;
}

.contexts-in > .mono-label { flex: none; }

.contexts ul { display: flex; flex-wrap: wrap; gap: 12px; }

.contexts li {
    padding: 6px 14px;
    border: 1px solid var(--rule-strong);
    background: var(--paper);
    font-size: 14px;
    color: var(--ink-2);
}

/* --------------------------------------------------------------------------
   10. CAPACIDADES
   -------------------------------------------------------------------------- */

.capabilities {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
    border-top: 1px solid var(--rule-strong);
    border-left: 1px solid var(--rule);
}

.cap {
    padding: 34px 30px 36px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
    transition: background .18s;
}

.cap:hover { background: var(--paper-2); }

.cap-id {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 22px;
    display: block;
}

.cap h3 { font-size: 1.22rem; margin-bottom: 12px; }

.cap > p { font-size: 15px; margin-bottom: 22px; }

.cap ul { border-top: 1px solid var(--rule); padding-top: 18px; }

.cap li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    color: var(--ink-3);
}

.cap li + li { margin-top: 9px; }

.cap li::before {
    content: "";
    position: absolute;
    left: 0; top: .62em;
    width: 8px; height: 1px;
    background: var(--accent);
}

/* --------------------------------------------------------------------------
   11. CASOS DE TRABAJO
   -------------------------------------------------------------------------- */

.cases { display: grid; gap: 22px; }

.case {
    border: 1px solid var(--rule);
    background: var(--paper);
    transition: border-color .18s, box-shadow .18s;
}

.case:hover { border-color: var(--rule-strong); box-shadow: var(--shadow); }

.case-hd {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 18px;
    padding: 20px 28px;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-2);
}

.case-hd h3 { font-size: 1.2rem; }

.case-kind {
    margin-left: auto;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
    border: 1px solid var(--rule-strong);
    padding: 3px 10px;
    white-space: nowrap;
}

.case-body { padding: 8px 28px 24px; }

.case-body > div {
    display: grid;
    grid-template-columns: 122px minmax(0, 1fr);
    gap: 0 24px;
    padding: 18px 0;
    border-bottom: 1px solid var(--rule);
}

.case-body dt {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
    padding-top: 4px;
}

.case-body dd { font-size: 15px; max-width: var(--measure); }

.case-ft {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px 24px;
    padding: 18px 28px 22px;
}

.stack-tags { display: flex; flex-wrap: wrap; gap: 7px; }

.stack-tags li {
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: .04em;
    color: var(--ink-3);
    border: 1px solid var(--rule);
    background: var(--paper-2);
    padding: 3px 9px;
}

.case-ft .link-arrow { font-size: 14.5px; }
.case-ft .link-arrow:first-of-type { margin-left: auto; }

/* --------------------------------------------------------------------------
   12. LOGROS
   -------------------------------------------------------------------------- */

.achv-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 18px;
    margin-bottom: 26px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--rule-strong);
}

.achv-head h3 { font-size: 1.05rem; }

.achv-head .mono-label { margin-left: auto; }

.achv-head ~ .achv-head { margin-top: 72px; }

/* --- 12a. Métricas de impacto --- */

.metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(224px, 1fr));
    border-top: 1px solid var(--rule);
    border-left: 1px solid var(--rule);
}

.metric {
    padding: 30px 26px 32px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
}

.metric-num {
    display: block;
    font-family: var(--mono);
    font-size: 2.6rem;
    font-weight: 600;
    line-height: 1;
    letter-spacing: -.035em;
    color: var(--accent);
    margin-bottom: 14px;
}

/* Valor todavía sin rellenar: se ve claramente pendiente, nunca inventado. */
.metric-num[data-pending] { color: var(--ink-4); }

.metric h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 7px;
}

.metric p { font-size: 13.5px; color: var(--ink-3); line-height: 1.5; }

.metric-note {
    display: block;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink-3);
}

/* --- 12b. Open source y comunidad --- */

.contribs { border-top: 1px solid var(--rule); }

.contrib {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr) auto;
    gap: 6px 28px;
    align-items: center;
    padding: 24px 4px;
    border-bottom: 1px solid var(--rule);
    transition: background .16s;
}

.contrib:hover { background: var(--paper-2); }

.contrib-kind {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--accent);
}

.contrib h4 { font-size: 1.02rem; margin-bottom: 5px; }
.contrib p { font-size: 14.5px; color: var(--ink-3); max-width: var(--measure); }
.contrib .link-arrow { font-size: 14px; white-space: nowrap; }

.contrib-links { display: flex; flex-direction: column; gap: 7px; align-items: flex-start; }

/* Fila sin enlaces: no reserva la columna de la derecha. */
.contrib:not(:has(.link-arrow, .contrib-links)) {
    grid-template-columns: 132px minmax(0, 1fr);
}

/* --------------------------------------------------------------------------
   13. METODOLOGÍA
   -------------------------------------------------------------------------- */

.phases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(232px, 1fr));
    gap: 0;
    border-left: 1px solid var(--rule);
}

.phase {
    padding: 28px 26px 32px;
    border-right: 1px solid var(--rule);
    border-top: 2px solid var(--ink);
    position: relative;
}

.phase-n {
    display: block;
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .14em;
    color: var(--accent);
    margin-bottom: 18px;
}

.phase h3 { font-size: 1.1rem; margin-bottom: 10px; }
.phase p { font-size: 14.5px; margin-bottom: 20px; }

.phase-out {
    padding-top: 14px;
    border-top: 1px solid var(--rule);
    font-size: 13px;
    color: var(--ink-3);
}

.phase-out b {
    display: block;
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 5px;
}

/* Declaración destacada: postura sobre el uso de IA. */
.statement {
    margin-top: 30px;
    border: 1px solid var(--rule-strong);
    border-left: 3px solid var(--accent);
    background: var(--paper);
    padding: 28px 30px 30px;
}

.statement h3 {
    font-size: 1.16rem;
    line-height: 1.3;
    max-width: 36ch;
    margin: 12px 0 14px;
}

.statement > p {
    font-size: 15px;
    max-width: var(--measure);
    margin-bottom: 22px;
}

.statement-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 14px 30px;
    padding-top: 20px;
    border-top: 1px solid var(--rule);
}

.statement-list li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    color: var(--ink-3);
}

.statement-list li::before {
    content: "";
    position: absolute;
    left: 0; top: .62em;
    width: 8px; height: 1px;
    background: var(--accent);
}

/* --------------------------------------------------------------------------
   14. STACK
   -------------------------------------------------------------------------- */

.stack-groups { border-top: 1px solid var(--rule); }

.stack-group {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 12px 32px;
    padding: 26px 0;
    border-bottom: 1px solid var(--rule);
}

.stack-group h3 { font-size: 15px; font-weight: 600; }

.stack-group .mono-label { display: block; margin-top: 3px; font-size: 10.5px; }

.stack-group ul { display: flex; flex-wrap: wrap; gap: 8px; align-content: start; }

.stack-group li {
    font-family: var(--mono);
    font-size: 12.5px;
    letter-spacing: .02em;
    color: var(--ink-2);
    border: 1px solid var(--rule-strong);
    padding: 5px 11px;
}

.stack-group[data-growing] li {
    color: var(--accent);
    border-color: var(--accent-line);
    background: var(--accent-soft);
}

/* --------------------------------------------------------------------------
   15. SOBRE MÍ
   -------------------------------------------------------------------------- */

.about {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 60px;
    align-items: start;
}

.about-copy > p + p { margin-top: 18px; }
.about-copy p { max-width: var(--measure); }

.principles { border-top: 1px solid var(--rule-strong); }

.principle { padding: 20px 0; border-bottom: 1px solid var(--rule); }

.principle h3 {
    font-size: 14.5px;
    font-weight: 600;
    margin-bottom: 6px;
}

.principle p { font-size: 14px; color: var(--ink-3); }

/* --------------------------------------------------------------------------
   16. CONTACTO
   -------------------------------------------------------------------------- */

.contact {
    border-top: 1px solid var(--rule);
    background: var(--paper-2);
    padding-block: 92px;
    scroll-margin-top: var(--head-h);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 64px;
    align-items: start;
}

.contact h2 {
    font-size: clamp(1.8rem, 3.6vw, 2.7rem);
    letter-spacing: -.028em;
    max-width: 18ch;
    margin: 18px 0 20px;
}

.contact-lede { font-size: 1.1rem; color: var(--ink-2); max-width: 52ch; margin-bottom: 34px; }

.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.contact-direct {
    margin-top: 34px;
    padding-top: 26px;
    border-top: 1px solid var(--rule-strong);
    display: flex;
    flex-wrap: wrap;
    gap: 12px 36px;
}

.contact-direct a { color: var(--ink); font-size: 15px; border-bottom: 1px solid var(--rule-strong); padding-bottom: 2px; }
.contact-direct a:hover { border-color: var(--accent); color: var(--accent); }

.brief {
    border: 1px solid var(--rule-strong);
    background: var(--paper);
    padding: 26px 24px 28px;
}

.brief h3 { font-size: 15px; margin: 14px 0 16px; }

.brief ol { counter-reset: b; }

.brief li {
    counter-increment: b;
    position: relative;
    padding-left: 32px;
    font-size: 14.5px;
    color: var(--ink-2);
}

.brief li + li { margin-top: 14px; }

.brief li::before {
    content: counter(b, decimal-leading-zero);
    position: absolute;
    left: 0; top: 1px;
    font-family: var(--mono);
    font-size: 11.5px;
    font-weight: 600;
    color: var(--accent);
}

/* --------------------------------------------------------------------------
   17. PIE
   -------------------------------------------------------------------------- */

.footer { border-top: 1px solid var(--rule); padding-block: 40px 52px; }

.footer-in {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 40px;
}

.footer-copy { font-size: 13.5px; color: var(--ink-3); }

.footer nav { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-left: auto; }

.footer nav a { font-size: 13.5px; color: var(--ink-3); }
.footer nav a:hover { color: var(--ink); }

/* --------------------------------------------------------------------------
   18. RESPONSIVE
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
    .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 46px; }
    .spec { max-width: 460px; }
    .about, .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 44px; }
    .brief { max-width: 460px; }
}

@media (max-width: 920px) {
    :root { --label-col: 100%; }

    .sec-grid { grid-template-columns: minmax(0, 1fr); gap: 0; }

    .sec-label {
        position: static;
        flex-direction: row;
        align-items: center;
        gap: 12px;
        margin-bottom: 22px;
        padding-top: 0;
    }

    .sec-label::before { margin-bottom: 0; }

    .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kpi { padding: 24px 20px 26px; border-top: 1px solid var(--rule); }
    .kpi:first-child { border-left: 0; padding-left: 20px; }
    .kpi:nth-child(odd) { border-left: 0; padding-left: 0; }
    .kpis { border-top: 0; }

    .contrib { grid-template-columns: minmax(0, 1fr); gap: 10px; }
    .contrib .link-arrow, .contrib-links { justify-self: start; }

    .stack-group { grid-template-columns: minmax(0, 1fr); gap: 14px; }
}

@media (max-width: 760px) {
    body { font-size: 15.5px; }

    .container { width: calc(100% - 36px); }

    .sec { padding-block: 64px; }
    .contact { padding-block: 64px; }
    .hero { padding-top: 56px; }
    .kpis { margin-top: 54px; }

    /* La navegación pasa a una segunda fila desplazable: sin menú, sin JS. */
    .masthead-in { flex-wrap: wrap; gap: 10px 16px; min-height: 0; padding-block: 12px 0; }
    .masthead-actions { margin-left: auto; }

    .mainnav {
        order: 3;
        width: 100%;
        margin-left: 0;
        gap: 0;
        overflow-x: auto;
        scrollbar-width: none;
        border-top: 1px solid var(--rule);
        padding-top: 2px;
    }

    .mainnav::-webkit-scrollbar { display: none; }
    .mainnav a { padding: 9px 12px; font-size: 14px; }
    .mainnav a:first-child { padding-left: 0; }
    .mainnav a:first-child::after { left: 0; }

    :root { --head-h: 108px; }

    .case-hd, .case-body, .case-ft { padding-inline: 20px; }
    .case-kind { margin-left: 0; }

    .case-body > div { grid-template-columns: minmax(0, 1fr); gap: 6px; padding: 15px 0; }

    .case-ft .link-arrow:first-of-type { margin-left: 0; }

    .cap { padding: 26px 22px 28px; }
    .statement { padding: 24px 20px 26px; }
    .metric { padding: 26px 20px 28px; }
    .phase { padding: 24px 20px 28px; }

    .spec dl > div { grid-template-columns: 84px minmax(0, 1fr); }

    .footer-in { flex-direction: column; align-items: flex-start; }
    .footer nav { margin-left: 0; }
}

@media (max-width: 460px) {
    .kpis { grid-template-columns: minmax(0, 1fr); }
    .kpi { padding: 22px 0 24px; border-left: 0; }
    .brand-role { display: none; }
}

/* --------------------------------------------------------------------------
   19. IMPRESIÓN
   -------------------------------------------------------------------------- */

@media print {
    .masthead, .theme-toggle, .skip, .hero-actions, .contact-actions { display: none !important; }

    body { background: #fff; color: #000; font-size: 11pt; }

    .sec, .contact { padding-block: 18pt; break-inside: avoid; }
    .sec-grid, .hero-grid, .about, .contact-grid { display: block; }
    .case, .cap, .metric, .phase { break-inside: avoid; }
    a::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
    a[href^="#"]::after { content: ""; }
}