/* ============================================================= */
/*  Jose Hernandez — Portfolio                                    */
/*  Estilo: techno / brutalista monocromo (ref. bcco.berlin)      */
/*  Sin neón, sin glow, sin scanlines — la tipografía manda.      */
/* ============================================================= */

:root {
    --font-display: 'Oswald', 'Arial Narrow', sans-serif;
    --font-body: 'Rubik', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

    --maxw: 1180px;
    --pad: clamp(20px, 5vw, 56px);
    --nav-h: 64px;
}

/* monocromo — oscuro (por defecto) — paleta calibrada contra bcco.berlin */
:root,
[data-theme="dark"] {
    --bg: #171717;
    --bg-rgb: 23, 23, 23;
    --surface: #232322;
    --surface-2: #2e2e2e;
    --fg: #ffffff;
    --fg-rgb: 255, 255, 255;
    --muted: #8f8f8f;
    --muted-2: #7a7a7a;
    --line: rgba(255, 255, 255, 0.2);
    --line-2: #434343;
}

/* monocromo — claro (mismo lenguaje visual, sin acentos de color) */
[data-theme="light"] {
    --bg: #f4f4f2;
    --bg-rgb: 244, 244, 242;
    --surface: #ffffff;
    --surface-2: #ececea;
    --fg: #0b0b0b;
    --fg-rgb: 11, 11, 11;
    --muted: #4a4a4a;
    --muted-2: #5c5c5c;
    --line: rgba(0, 0, 0, 0.14);
    --line-2: #d8d8d6;
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg);
}

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    transition: background-color .25s ease, color .25s ease;
}

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

img {
    max-width: 100%;
    height: auto;
}

strong,
b {
    font-weight: 500;
    color: var(--fg);
}

::selection {
    background: var(--fg);
    color: var(--bg);
}

/* foco de teclado visible y consistente */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.checkbtn:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 3px;
}

main {
    position: relative;
    z-index: 1;
}

/**************************
 navbar
***************************/
nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 20;
    width: 100%;
    min-height: var(--nav-h);
    padding: 0 var(--pad);
    background-color: rgba(var(--bg-rgb), 0.86);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}

.nav_font {
    font-family: var(--font-display);
    font-weight: 700;
}

nav li a {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color 0.2s;
}

nav li a:hover {
    color: var(--fg);
}

.marca a {
    color: var(--fg);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.marca a::before {
    content: "> ";
    color: var(--muted);
}

.nav_lista {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
    margin: 0;
}

.nav_item {
    padding: 0;
}

.nav_item a {
    position: relative;
    display: inline-block;
    padding: 8px 2px;
}

/* controles del nav: idioma + tema + hamburguesa */
.nav_tools {
    display: flex;
    align-items: center;
    gap: 14px;
}

.lang_switch {
    display: flex;
    border: 1px solid var(--line-2);
}

.lang_btn {
    background: none;
    border: none;
    padding: 6px 9px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--muted);
    cursor: pointer;
    transition: background-color .2s, color .2s;
}

.lang_btn + .lang_btn {
    border-left: 1px solid var(--line-2);
}

.lang_btn[aria-current="true"] {
    color: var(--bg);
    background-color: var(--fg);
}

.theme_toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--line-2);
    color: var(--fg);
    font-size: 13px;
    cursor: pointer;
    transition: border-color .2s;
}

.theme_toggle:hover {
    border-color: var(--fg);
}

/* botón hamburguesa accesible */
.checkbtn {
    display: none;
    background: none;
    border: none;
    padding: 8px;
    font-size: 22px;
    line-height: 1;
    color: var(--fg);
    cursor: pointer;
}

@media (max-width: 900px) {
    .checkbtn {
        display: inline-flex;
    }

    .nav_lista {
        position: fixed;
        flex-direction: column;
        justify-content: center;
        gap: 42px;
        width: 100%;
        height: calc(100vh - var(--nav-h));
        height: calc(100dvh - var(--nav-h));
        top: var(--nav-h);
        left: -100%;
        text-align: center;
        transition: left .35s ease;
        background-color: rgba(var(--bg-rgb), 0.98);
        border-top: 1px solid var(--line);
    }

    .nav_lista.open {
        left: 0;
    }

    .nav_lista li a {
        font-size: 18px;
    }
}

/* subrayado de nav (monocromo) */
.hvr-overline-from-center {
    display: inline-block;
    position: relative;
}

.hvr-overline-from-center::before {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    top: 0;
    height: 1px;
    background: var(--fg);
    transition: left .25s ease-out, right .25s ease-out;
}

.hvr-overline-from-center:hover::before,
.hvr-overline-from-center:focus::before {
    left: 0;
    right: 0;
}

/* ****************************** */
/* HERO                           */
/* ****************************** */
#home {
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    min-height: 90dvh;
    display: flex;
    align-items: center;
    padding: 120px var(--pad) 60px;
    background-color: var(--bg);
    border-bottom: 1px solid var(--line);
}

.hero_bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.9;
}

.container_presentacion {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.hero_tag {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 26px;
}

.hero_tag b {
    color: var(--fg);
    font-weight: 500;
}

.name {
    color: var(--fg);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(56px, 12vw, 148px);
    line-height: 0.92;
    letter-spacing: -1px;
    text-transform: uppercase;
}

.hero_role {
    font-family: var(--font-mono);
    font-size: clamp(14px, 2.4vw, 20px);
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 20px;
    min-height: 24px;
}

.hero_role .prompt {
    color: var(--fg);
    margin-right: 8px;
}

.present {
    color: var(--muted);
    font-size: 16px;
    font-weight: 300;
    line-height: 1.75;
    letter-spacing: 0.2px;
    max-width: 600px;
    margin-top: 28px;
}

.present b {
    color: var(--fg);
    font-weight: 500;
}

.hero_actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 36px;
}

#btn_cv,
.btn_solid,
.btn_ghost {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 15px 28px;
    font-size: 12px;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    border: 1px solid var(--fg);
    transition: background-color .2s, color .2s, border-color .2s;
}

#btn_cv,
.btn_solid {
    color: var(--bg);
    background-color: var(--fg);
}

#btn_cv:hover,
.btn_solid:hover {
    background-color: transparent;
    color: var(--fg);
}

.btn_ghost {
    color: var(--fg);
    background-color: transparent;
    border-color: var(--line-2);
}

.btn_ghost:hover {
    border-color: var(--fg);
}

/* ****************************** */
/* TICKER (flyer techno)          */
/* ****************************** */
.ticker {
    overflow: hidden;
    white-space: nowrap;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    background: var(--surface-2);
}

.ticker__track {
    display: inline-block;
    animation: scroll 30s linear infinite;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 15px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
}

.ticker__track span {
    margin: 0 18px;
    color: var(--fg);
}

.ticker__track b {
    margin: 0 18px;
    color: var(--muted-2);
    font-weight: 400;
}

@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ****************************** */
/* Encabezados de sección          */
/* ****************************** */
.sec-head {
    display: flex;
    align-items: baseline;
    gap: 18px;
    max-width: var(--maxw);
    margin: 0 auto 46px;
}

.sec-idx {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--muted);
    flex-shrink: 0;
}

.titulo {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(30px, 5vw, 52px);
    line-height: 1.05;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--fg);
    flex-shrink: 1;
    min-width: 0;
}

.sec-rule {
    flex: 1;
    height: 1px;
    background: var(--line);
    align-self: center;
    min-width: 30px;
}

/* ****************************** */
/* ABOUT                          */
/* ****************************** */
#about_me {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

.about_grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 54px;
    align-items: center;
    max-width: var(--maxw);
    margin: 0 auto;
}

#description {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 16px;
    color: var(--muted);
    text-align: left;
    line-height: 1.9;
}

#description strong {
    color: var(--fg);
    font-weight: 500;
}

#description .hl {
    color: var(--fg);
    font-weight: 500;
    border-bottom: 1px solid var(--line-2);
}

/* spec-sheet / terminal (monocromo) — sin barra de ventana, minimalista */
.terminal_card {
    background: var(--surface);
    border: 1px solid var(--line);
    overflow: hidden;
    font-family: var(--font-mono);
}

.terminal_body {
    padding: 18px;
    font-size: 13px;
    line-height: 2.1;
}

.terminal_body .row_t {
    overflow-wrap: break-word;
}

.terminal_body .key {
    color: var(--muted);
}

.terminal_body .arrow {
    color: var(--muted-2);
    margin: 0 8px;
}

.terminal_body .val {
    color: var(--fg);
}

@media (max-width: 900px) {
    .about_grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}

/* ****************************** */
/* animaciones conservadas         */
/* ****************************** */
.animate__fadeInUp { animation-duration: 1s; }

/* ****************************** */
/* SKILLS / STACK                 */
/* ****************************** */
#skills {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

#description_skills {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 16px;
    color: var(--muted);
    text-align: left;
    line-height: 1.85;
    max-width: var(--maxw);
    margin: -20px auto 44px;
}

#description_skills b {
    color: var(--fg);
    font-weight: 500;
}

.stack-list {
    max-width: var(--maxw);
    margin: 0 auto;
    border-top: 1px solid var(--line);
}

.stack-row {
    display: grid;
    grid-template-columns: 210px 1fr;
    gap: 24px;
    align-items: baseline;
    padding: 22px 6px;
    border-bottom: 1px solid var(--line);
    transition: background-color .2s, padding .2s;
}

.stack-row:hover {
    background-color: var(--surface);
    padding-left: 16px;
    padding-right: 16px;
}

.stack-row dt {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--muted);
}

.stack-row dt::before {
    content: "// ";
    color: var(--fg);
}

.stack-row.hot dt {
    color: var(--fg);
}

.stack-row dd {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
    margin: 0;
}

.stack-row dd span {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 19px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--fg);
    line-height: 1;
    transition: color .2s;
}

.stack-row.hot dd span {
    color: var(--fg);
}

@media (max-width: 640px) {
    .stack-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stack-row dd span {
        font-size: 17px;
    }
}

/* ****************************** */
/* CERTIFICACIONES                 */
/* ****************************** */
#certifications {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

.certs {
    list-style: none;
    max-width: var(--maxw);
    margin: 0 auto;
    border-top: 1px solid var(--line);
}

.cert {
    display: grid;
    grid-template-columns: 40px 1fr auto;
    align-items: center;
    gap: 22px;
    padding: 22px 4px;
    border-bottom: 1px solid var(--line);
    transition: background-color .2s, padding .2s;
}

.cert:hover {
    background-color: var(--surface);
    padding-left: 14px;
    padding-right: 14px;
}

.cert__idx {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted-2);
}

.cert__main {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.cert__name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--fg);
    line-height: 1.2;
}

.cert__name .ph {
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--muted);
    padding: 2px 6px;
    margin-left: 8px;
    vertical-align: middle;
}

.cert__issuer {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.5px;
}

/* fecha + credencial agrupadas en una sola columna derecha */
.cert__side {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.cert__date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 1px;
}

.cert__cred {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--fg);
    border-bottom: 1px solid var(--line-2);
    transition: border-color .2s;
}

.cert__cred:hover {
    border-color: var(--fg);
}

@media (max-width: 640px) {
    .cert {
        grid-template-columns: 28px 1fr;
        gap: 8px 14px;
    }

    .cert__side {
        grid-column: 2;
        flex-direction: row;
        align-items: baseline;
        gap: 16px;
    }

    .cert__date {
        font-size: 11px;
    }
}

/* ****************************** */
/* ARQUITECTURAS / PATRONES        */
/* ****************************** */
#architecture {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

#description_architecture {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 16px;
    color: var(--muted);
    max-width: var(--maxw);
    margin: 0 auto 56px;
}

.patterns_grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    max-width: var(--maxw);
    margin: 0 auto;
}

.pattern_card {
    background: var(--bg);
    padding: 28px 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    transition: background-color .2s;
}

.pattern_card:hover {
    background: var(--surface);
}

.pattern_card--wide {
    grid-column: 1 / -1;
    align-items: center;
    text-align: center;
}

.pattern_card--wide .pattern_head,
.pattern_card--wide .pattern_diagram,
.pattern_card--wide .pattern_name,
.pattern_card--wide .pattern_desc {
    width: 100%;
    max-width: 460px;
}

.pattern_head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.pattern_idx {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted-2);
}

.pattern_tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--muted);
    border: 1px solid var(--line-2);
    padding: 3px 8px;
}

.pattern_diagram {
    border: 1px solid var(--line);
    background: var(--surface);
    padding: 10px;
}

.pattern_diagram svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}

.pattern_diagram .pd-line {
    stroke: var(--muted-2);
    stroke-width: 1.5;
    fill: none;
}

.pattern_diagram .pd-dash {
    stroke: var(--muted-2);
    stroke-width: 1.5;
    stroke-dasharray: 3 3;
    fill: none;
}

.pattern_diagram .pd-fill {
    fill: var(--muted-2);
}

.pattern_diagram .pd-node {
    fill: var(--bg);
    stroke: var(--fg);
    stroke-width: 1.5;
}

.pattern_diagram .pd-node.hi {
    fill: var(--fg);
}

.pattern_diagram .pd-node.hi + .pd-label {
    fill: var(--bg);
}

.pattern_diagram .pd-node-dot {
    fill: var(--fg);
}

.pattern_diagram .pd-node-dot.lg {
    fill: var(--bg);
    stroke: var(--fg);
    stroke-width: 1.5;
}

.pattern_diagram .pd-label {
    font-family: var(--font-mono);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    fill: var(--fg);
    text-anchor: middle;
    dominant-baseline: middle;
}

.pattern_diagram .pd-label.mono {
    fill: var(--muted);
    font-size: 8px;
}

.pattern_diagram .pd-label.sm {
    font-size: 7px;
    letter-spacing: 0.2px;
}

.pattern_name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--fg);
    line-height: 1.25;
}

.pattern_desc {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--muted);
    line-height: 1.7;
}

@media (max-width: 900px) {
    .patterns_grid {
        grid-template-columns: 1fr;
    }
}

.patterns_subtitle {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    max-width: var(--maxw);
    margin: 64px auto 24px;
}

.patterns_subtitle::before {
    content: "// ";
    color: var(--fg);
}

.blocks_grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    max-width: var(--maxw);
    margin: 0 auto;
}

.block_card {
    background: var(--bg);
    padding: 26px 22px 30px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: background-color .2s;
}

.block_card:hover {
    background: var(--surface);
}

.block_icon {
    width: 34px;
    height: 34px;
    border: 1px solid var(--line-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--fg);
}

.block_name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--fg);
    line-height: 1.25;
}

.block_desc {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
    line-height: 1.65;
}

@media (max-width: 900px) {
    .blocks_grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 560px) {
    .blocks_grid {
        grid-template-columns: 1fr;
    }
}

/* ****************************** */
/* PROJECTS                       */
/* ****************************** */
#project {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

/* galería de proyectos (estilo tienda: imagen dominante, caption mínima, sin cajas) */
.projects_grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 56px 24px;
    max-width: var(--maxw);
    margin: 0 auto;
}

.gallery_item {
    display: block;
}

.gallery_item--wide {
    grid-column: 1 / -1;
}

.gallery_media {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--surface);
}

.gallery_item--wide .gallery_media {
    aspect-ratio: 21 / 9;
}

.gallery_media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    filter: grayscale(1) contrast(1.05);
    transition: filter .4s ease, transform .5s ease;
}

.gallery_item:hover .gallery_media img,
.gallery_item:focus-visible .gallery_media img {
    filter: grayscale(0);
    transform: scale(1.03);
}

/* pieza con animación (atom-agent-ia) en vez de foto */
.gallery_media.is-anim {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-2);
}

.gallery_media.is-anim .atom-anim {
    width: 100%;
    height: 100%;
}

/* badge sobre la imagen (como "Sold out" en una tienda) */
.gallery_badge {
    position: absolute;
    top: 12px;
    right: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    background: rgba(var(--bg-rgb), 0.85);
    border: 1px solid var(--line-2);
    padding: 5px 9px;
}

.gallery_caption {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 14px;
}

.gallery_titlerow {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.gallery_title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 19px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--fg);
    margin: 0;
    text-wrap: balance;
}

.gallery_arrow {
    font-family: var(--font-mono);
    color: var(--fg);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity .25s ease, transform .25s ease;
}

.gallery_item:hover .gallery_arrow,
.gallery_item:focus-visible .gallery_arrow {
    opacity: 1;
    transform: none;
}

.gallery_idx {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted-2);
}

.gallery_meta {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0;
}

@media (max-width: 640px) {
    .projects_grid {
        grid-template-columns: 1fr;
        gap: 44px;
    }

    .gallery_item--wide .gallery_media {
        aspect-ratio: 4 / 3;
    }
}

/* atom-agent-ia: núcleo orbital animado */
.aai-orbit { fill: none; stroke: var(--line-2); stroke-width: 1.4; }
.aai-orbit.hi { stroke: var(--muted); }
.aai-electron { fill: var(--fg); }
.aai-core { fill: var(--fg); animation: aai-breathe 3.2s ease-in-out infinite; }
.aai-halo { fill: none; stroke: var(--fg); stroke-opacity: .22; stroke-width: 1; }
.aai-pulse {
    fill: none;
    stroke: var(--fg);
    stroke-width: 1.2;
    opacity: 0;
    transform-box: view-box;
    transform-origin: 180px 100px;
    animation: aai-ping 3.6s ease-out infinite;
}
.aai-pulse.p2 { animation-delay: 1.8s; }
.aai-spin { transform-box: view-box; transform-origin: 180px 100px; }
.aai-o1 { transform: rotate(0deg); animation: aai-s1 9s linear infinite; }
.aai-o2 { transform: rotate(60deg); animation: aai-s2 12s linear infinite; }
.aai-o3 { transform: rotate(120deg); animation: aai-s3 15s linear infinite; }

@keyframes aai-s1 { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes aai-s2 { from { transform: rotate(60deg); } to { transform: rotate(420deg); } }
@keyframes aai-s3 { from { transform: rotate(120deg); } to { transform: rotate(-240deg); } }
@keyframes aai-breathe { 0%, 100% { opacity: 1; } 50% { opacity: .55; } }
@keyframes aai-ping { 0% { transform: scale(.35); opacity: .5; } 70% { opacity: 0; } 100% { transform: scale(1.75); opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
    .aai-o1, .aai-o2, .aai-o3, .aai-core { animation: none; }
    .aai-pulse { display: none; }
}

/* .project_tags se usa en las páginas de detalle de proyecto */
.project_tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.project_tags span {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    padding: 4px 9px;
    border: 1px solid var(--line-2);
}

/* ****************************** */
/* CONTACT                        */
/* ****************************** */
#contact {
    background-color: var(--bg);
    padding: 100px var(--pad);
    border-top: 1px solid var(--line);
}

.contact_inner {
    max-width: 640px;
    margin: 0 auto;
}

.contact_lead {
    color: var(--muted);
    font-size: 15px;
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    text-align: center;
}

.contact_mail {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 22px 0 40px;
}

.contact_mail i {
    color: var(--fg);
    font-size: 18px;
}

.contact_mail span {
    color: var(--fg);
    font-size: 14px;
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
}

.contact_btn {
    display: block;
    width: 100%;
    text-align: center;
    color: var(--bg);
    font-size: 12px;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: var(--fg);
    border: 1px solid var(--fg);
    border-radius: 0;
    padding: 15px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.contact_btn:hover {
    background-color: transparent;
    color: var(--fg);
}

/* agendar demo — formulario simple, debajo del CTA de correo */
.demo_divider {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted-2);
    margin: 44px 0 22px;
}

#demo_form {
    max-width: 440px;
    margin: 0 auto;
}

.demo_form_body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.form_row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
    text-align: center;
}

.form_row label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
}

.form_row input,
.form_row textarea {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--line-2);
    color: var(--fg);
    font-family: var(--font-body);
    font-size: 14px;
    text-align: left;
    padding: 11px 12px;
    resize: vertical;
    transition: border-color .2s;
}

.form_row input::placeholder,
.form_row textarea::placeholder {
    color: var(--muted-2);
}

.form_row input:focus-visible,
.form_row textarea:focus-visible {
    outline: none;
    border-color: var(--fg);
}

.form_row textarea {
    min-height: 84px;
}

.demo_submit {
    margin-top: 4px;
}

.demo_submit:disabled {
    opacity: .5;
    cursor: default;
}

.demo_status {
    width: 100%;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .3px;
    line-height: 1.6;
    min-height: 16px;
    margin: 0;
    color: var(--muted);
}

.demo_status:empty {
    display: none;
}

.demo_status.is-success {
    color: var(--fg);
    font-weight: 500;
}

.demo_status.is-error {
    color: var(--fg);
    border-top: 1px solid var(--line-2);
    border-bottom: 1px solid var(--line-2);
    padding: 8px 0;
}

/* ****************************** */
/* FOOTER                         */
/* ****************************** */
footer {
    background-color: var(--bg);
    border-top: 1px solid var(--line);
}

.footer_inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 64px var(--pad);
    text-align: center;
}

.footer_name {
    color: var(--fg);
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.footer_tagline {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 26px;
}

.footer_hr {
    border: none;
    height: 1px;
    width: 100%;
    background: var(--line);
    margin: 34px auto 18px;
}

.footer_socials {
    display: flex;
    justify-content: center;
    gap: 14px;
}

.footer_social_link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-2);
    color: var(--muted);
    font-size: 17px;
    transition: border-color 0.2s, color 0.2s;
}

.footer_social_link:hover {
    border-color: var(--fg);
    color: var(--fg);
}

.footer_copy {
    color: var(--muted-2);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.5px;
}

/* ****************************** */
/* back-to-top                    */
/* ****************************** */
.to-top {
    background: var(--surface);
    border: 1px solid var(--line-2);
    position: fixed;
    bottom: 16px;
    right: 24px;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s, border-color .2s, bottom .3s;
    z-index: 15;
}

.to-top:hover {
    border-color: var(--fg);
}

.to-top i {
    color: var(--fg) !important;
    font-size: 16px;
}

.to-top.active {
    bottom: 28px;
    pointer-events: auto;
    opacity: 1;
}

/* ****************************** */
/* CHAT WIDGET: sus estilos viven encapsulados en el Shadow DOM que crea */
/* js/chat-widget.js — a propósito, para que el widget quede 100% aislado */
/* del CSS del sitio (y viceversa) y no dependa de esta hoja global. */
/* ****************************** */

/* ****************************** */
/* ERROR PAGE (error.html — documento de error estático) */
/* ****************************** */
#error-page {
    min-height: 80vh;
    min-height: 80dvh;
    display: flex;
    align-items: center;
    padding: 150px var(--pad) 100px;
    background-color: var(--bg);
    border-bottom: 1px solid var(--line);
}

.error_title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(34px, 6vw, 64px);
    line-height: 1.02;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--fg);
}

@media (max-width: 640px) {
    #error-page {
        padding-top: 116px;
    }
}

/* ****************************** */
/* responsive fino                 */
/* ****************************** */
@media (max-width: 640px) {
    #home {
        min-height: 82vh;
        min-height: 82dvh;
        padding-top: 100px;
    }

    #btn_cv,
    .btn_ghost {
        flex: 1;
        min-width: 140px;
    }

    .sec-head {
        gap: 12px;
    }
}

/* respeta a quien prefiere menos movimiento */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }

    .ticker__track {
        animation: none;
        transform: none;
    }
}