@import url('/css/fonts.css');

/* ==========================================================================
   SisArs SRL — sistema visual
   Editorial técnico: papel cálido, tinta, un único acento óxido.
   Sin frameworks, sin JS.
   ========================================================================== */

:root {
    --paper:      #f6f4ef;
    --paper-2:    #efece4;
    --paper-3:    #e7e3d9;
    --ink:        #16191d;
    --ink-2:      #4c525a;
    --ink-3:      #878d96;
    --rule:       #d8d3c7;
    --rule-soft:  #e5e1d7;
    --accent:     #b4451f;
    --accent-ink: #8f3416;
    --accent-bg:  rgba(180, 69, 31, .08);
    --focus:      #b4451f;

    --serif: 'Newsreader', Georgia, 'Times New Roman', serif;
    --sans:  'IBM Plex Sans', 'Segoe UI', system-ui, sans-serif;
    --mono:  'IBM Plex Mono', ui-monospace, Consolas, monospace;

    --shell: 1200px;
    --gutter: clamp(1.25rem, 4vw, 3rem);
    --section-y: clamp(4.5rem, 9vw, 8rem);

    --f-display: clamp(2.75rem, 6.4vw, 5.25rem);
    --f-h2:      clamp(1.9rem, 3.6vw, 2.9rem);
    --f-h3:      clamp(1.25rem, 1.9vw, 1.6rem);
    --f-lead:    clamp(1.06rem, 1.35vw, 1.28rem);
    --f-body:    1rem;
    --f-mono:    .735rem;

    --ease: cubic-bezier(.22, .61, .36, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --paper:      #101317;
        --paper-2:    #171b20;
        --paper-3:    #1d222a;
        --ink:        #ecebe6;
        --ink-2:      #a9aeb6;
        --ink-3:      #737a83;
        --rule:       #272c34;
        --rule-soft:  #1f242b;
        --accent:     #e07a4e;
        --accent-ink: #f0906a;
        --accent-bg:  rgba(224, 122, 78, .10);
        --focus:      #e07a4e;
    }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: var(--f-body);
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
    font-family: var(--serif);
    font-weight: 500;
    line-height: 1.08;
    letter-spacing: -.015em;
    margin: 0;
    text-wrap: balance;
}

p { margin: 0 0 1.1em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: var(--ink); text-decoration-color: var(--rule); text-underline-offset: .18em; }
a:hover { text-decoration-color: var(--accent); }

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
    border-radius: 1px;
}

.shell {
    width: 100%;
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.skip {
    position: absolute; left: -9999px;
    background: var(--ink); color: var(--paper);
    padding: .7rem 1rem; z-index: 100; font-family: var(--mono); font-size: var(--f-mono);
}
.skip:focus { left: 1rem; top: 1rem; }

/* --- Etiquetas monoespaciadas -------------------------------------------- */

.eyebrow {
    font-family: var(--mono);
    font-size: var(--f-mono);
    font-weight: 500;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin: 0;
}
.eyebrow .num { color: var(--accent); }

/* --- Header -------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--rule-soft);
}
.site-header .shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: 68px;
}

.brand {
    display: inline-flex;
    align-items: baseline;
    gap: .55rem;
    text-decoration: none;
    font-family: var(--serif);
    font-size: 1.34rem;
    letter-spacing: -.01em;
    color: var(--ink);
}
.brand b { font-weight: 600; }
.brand .tld {
    font-family: var(--mono);
    font-size: .62rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--ink-3);
}

.nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2rem); }
.nav a {
    font-size: .875rem;
    text-decoration: none;
    color: var(--ink-2);
    padding-block: .35rem;
    border-bottom: 1px solid transparent;
    transition: color .18s var(--ease), border-color .18s var(--ease);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.nav .nav-cta {
    border: 1px solid var(--ink);
    border-radius: 2px;
    padding: .42rem .95rem;
    color: var(--ink);
}
.nav .nav-cta:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

@media (max-width: 720px) {
    .nav .nav-link { display: none; }
}

/* --- Portada ------------------------------------------------------------- */

.hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--rule);
    padding-block: clamp(4rem, 10vw, 8.5rem) clamp(3rem, 6vw, 5rem);
}
/* Retícula de plano técnico, muy tenue */
.hero::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(to right, var(--rule-soft) 1px, transparent 1px),
        linear-gradient(to bottom, var(--rule-soft) 1px, transparent 1px);
    background-size: 74px 74px;
    -webkit-mask-image: radial-gradient(120% 90% at 78% 8%, #000 0%, transparent 68%);
            mask-image: radial-gradient(120% 90% at 78% 8%, #000 0%, transparent 68%);
    pointer-events: none;
}
.hero > .shell { position: relative; }

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 15rem);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: end;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; align-items: start; } }

.hero h1 {
    font-size: var(--f-display);
    margin: 1.6rem 0 0;
    max-width: 15ch;
}
.hero h1 em { font-style: normal; color: var(--accent); }

.hero-lead {
    font-size: var(--f-lead);
    color: var(--ink-2);
    max-width: 58ch;
    margin-top: 1.7rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 2.4rem; }

.hero-meta {
    border-top: 1px solid var(--ink);
    padding-top: .9rem;
    font-family: var(--mono);
    font-size: var(--f-mono);
    line-height: 1.85;
    letter-spacing: .04em;
    color: var(--ink-3);
    text-transform: uppercase;
    margin: 0;
}
.hero-meta dt { color: var(--accent); margin-top: .9rem; }
.hero-meta dt:first-child { margin-top: 0; }
.hero-meta dd { margin: 0; color: var(--ink-2); }

/* --- Botones ------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-family: var(--mono);
    font-size: .78rem;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    text-decoration: none;
    padding: .82rem 1.5rem;
    border-radius: 2px;
    border: 1px solid var(--ink);
    background: var(--ink);
    color: var(--paper);
    cursor: pointer;
    transition: background .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--accent-bg); color: var(--accent-ink); border-color: var(--accent); transform: translateY(-1px); }
.btn .arrow { transition: transform .18s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* --- Cifras -------------------------------------------------------------- */

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid var(--rule);
}
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.stat {
    padding: clamp(1.6rem, 3vw, 2.4rem) clamp(1rem, 2vw, 1.6rem);
    border-left: 1px solid var(--rule-soft);
}
.stat:first-child { border-left: 0; padding-left: 0; }
@media (max-width: 760px) {
    .stat:nth-child(3) { border-left: 0; padding-left: 0; }
    .stat:nth-child(-n+2) { border-bottom: 1px solid var(--rule-soft); }
}
.stat .value {
    font-family: var(--serif);
    font-size: clamp(2.1rem, 4vw, 3.1rem);
    line-height: 1;
    letter-spacing: -.02em;
    display: block;
}
.stat .label {
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-top: .75rem;
    display: block;
}

/* --- Secciones ----------------------------------------------------------- */

.section { padding-block: var(--section-y); border-bottom: 1px solid var(--rule); }
.section--tint { background: var(--paper-2); }

.section-head {
    display: grid;
    grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: start;
    margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
@media (max-width: 820px) { .section-head { grid-template-columns: 1fr; gap: 1rem; } }

.section-head h2 { font-size: var(--f-h2); max-width: 18ch; }
.section-head .eyebrow { margin-bottom: 1rem; }
.section-head .intro { color: var(--ink-2); font-size: var(--f-lead); max-width: 52ch; }

/* --- Servicios ----------------------------------------------------------- */

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

.service {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 20rem) minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 2.5rem);
    padding: clamp(1.6rem, 3vw, 2.2rem) 0;
    border-bottom: 1px solid var(--rule-soft);
    position: relative;
}
.service::after {
    content: "";
    position: absolute;
    left: 0; bottom: -1px;
    width: 0; height: 1px;
    background: var(--accent);
    transition: width .4s var(--ease);
}
.service:hover::after { width: 100%; }
.service:hover .service-title { color: var(--accent-ink); }

.service .idx {
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .1em;
    color: var(--ink-3);
    padding-top: .5rem;
}
.service-title { font-size: var(--f-h3); transition: color .2s var(--ease); }
.service p { color: var(--ink-2); margin: 0; }

@media (max-width: 820px) {
    .service { grid-template-columns: 3rem minmax(0, 1fr); }
    .service p { grid-column: 2; margin-top: .6rem; }
}

/* --- Productos ----------------------------------------------------------- */

.products {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.25rem, 2.5vw, 2rem);
}
@media (max-width: 900px) { .products { grid-template-columns: 1fr; } }

.product {
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 3px;
    padding: clamp(1.6rem, 3vw, 2.6rem);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.product::before {
    content: "";
    position: absolute; top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .45s var(--ease);
}
.product:hover::before { transform: scaleX(1); }

.product .kicker {
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
}
.product h3 { font-size: clamp(1.7rem, 2.6vw, 2.2rem); margin: .8rem 0 .5rem; }
.product .tagline { color: var(--ink-2); font-size: 1.02rem; }

.feature-list { list-style: none; margin: 1.6rem 0 0; padding: 0; }
.feature-list li {
    position: relative;
    padding-left: 1.35rem;
    padding-block: .3rem;
    color: var(--ink-2);
    font-size: .95rem;
}
.feature-list li::before {
    content: "";
    position: absolute;
    left: 0; top: .85em;
    width: .42rem; height: .42rem;
    background: var(--accent);
    transform: rotate(45deg);
}

.timeline {
    margin-top: auto;
    padding-top: 1.9rem;
    border-top: 1px solid var(--rule-soft);
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .03em;
    color: var(--ink-3);
    display: grid;
    gap: .55rem;
}
.timeline div { display: grid; grid-template-columns: 4.2rem 1fr; gap: .8rem; }
.timeline b { color: var(--accent); font-weight: 500; }

/* --- Método -------------------------------------------------------------- */

.pillars {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.5rem, 3vw, 3rem);
}
@media (max-width: 860px) { .pillars { grid-template-columns: 1fr; } }

.pillar { border-top: 2px solid var(--ink); padding-top: 1.3rem; }
.pillar:nth-child(2) { border-top-color: var(--accent); }
.pillar h3 { font-size: var(--f-h3); margin-bottom: .8rem; }
.pillar p { color: var(--ink-2); font-size: .96rem; }

/* --- Tecnología ---------------------------------------------------------- */

.stack-grid {
    display: grid;
    grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: start;
}
@media (max-width: 820px) { .stack-grid { grid-template-columns: 1fr; } }

.stack-title { font-size: var(--f-h2); margin-top: 1rem; max-width: 14ch; }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0; list-style: none; }
.chips li {
    font-family: var(--mono);
    font-size: .78rem;
    letter-spacing: .03em;
    padding: .4rem .8rem;
    border: 1px solid var(--rule);
    border-radius: 2px;
    color: var(--ink-2);
    background: var(--paper);
    transition: border-color .18s var(--ease), color .18s var(--ease);
}
.chips li:hover { border-color: var(--accent); color: var(--accent-ink); }

.note {
    margin-top: 2rem;
    padding-left: 1.2rem;
    border-left: 2px solid var(--accent);
    font-family: var(--serif);
    font-size: 1.24rem;
    line-height: 1.45;
    color: var(--ink);
    max-width: 42ch;
}

/* --- Cierre -------------------------------------------------------------- */

.cta {
    background: var(--ink);
    color: var(--paper);
    padding-block: clamp(3.5rem, 7vw, 6rem);
}
.cta h2 { font-size: var(--f-h2); color: var(--paper); max-width: 16ch; }
.cta p { color: color-mix(in srgb, var(--paper) 70%, transparent); max-width: 48ch; margin-top: 1.1rem; }
.cta .btn { background: var(--paper); color: var(--ink); border-color: var(--paper); margin-top: 2rem; }
.cta .btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* --- Contacto ------------------------------------------------------------ */

.page-head {
    padding-block: clamp(3.5rem, 7vw, 6rem) clamp(2rem, 4vw, 3rem);
    border-bottom: 1px solid var(--rule);
}
.page-head h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-top: 1rem; max-width: 18ch; }
.page-head .intro { color: var(--ink-2); font-size: var(--f-lead); max-width: 54ch; margin-top: 1.3rem; }

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
    padding-block: var(--section-y);
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.field { margin-bottom: 1.4rem; }
.field label {
    display: block;
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: .5rem;
}
.field .opt { color: var(--rule); }

.field input,
.field textarea {
    width: 100%;
    font-family: var(--sans);
    font-size: 1rem;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 2px;
    padding: .8rem .9rem;
    transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.field textarea { resize: vertical; min-height: 9.5rem; line-height: 1.6; }
.field input:hover, .field textarea:hover { border-color: var(--ink-3); }
.field input:focus, .field textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}
.field input.input-validation-error, .field textarea.input-validation-error { border-color: var(--accent); }

.field-error, .validation-summary {
    display: block;
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .04em;
    color: var(--accent-ink);
    margin-top: .45rem;
}
.field-error:empty { display: none; }
.validation-summary ul { margin: 0; padding-left: 1.1rem; }

.fields-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1.25rem; }
@media (max-width: 620px) { .fields-2 { grid-template-columns: 1fr; } }

/* Trampa antispam: invisible para personas, la completan los bots. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.alert {
    border: 1px solid var(--rule);
    border-left: 3px solid var(--accent);
    background: var(--paper-2);
    padding: 1.1rem 1.3rem;
    border-radius: 2px;
    margin-bottom: 2rem;
}
.alert h2 { font-size: 1.3rem; margin-bottom: .4rem; }
.alert p { color: var(--ink-2); font-size: .95rem; }

.contact-aside dl { margin: 0; }
.contact-aside dt {
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-top: 2rem;
    padding-top: .85rem;
    border-top: 1px solid var(--rule);
}
.contact-aside dt:first-of-type { margin-top: 0; border-top: 2px solid var(--ink); }
.contact-aside dd { margin: .7rem 0 0; color: var(--ink-2); }
.contact-aside dd a { color: var(--ink); text-decoration-color: var(--accent); }

/* --- Prosa (privacidad, error) ------------------------------------------- */

.prose { max-width: 68ch; padding-block: var(--section-y); }
.prose h2 { font-size: clamp(1.35rem, 2.4vw, 1.75rem); margin: 2.6rem 0 .9rem; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { padding-left: 1.15rem; }
.prose li { margin-bottom: .45rem; }

/* --- Pie ----------------------------------------------------------------- */

.site-footer {
    background: var(--paper-2);
    border-top: 1px solid var(--rule);
    padding-top: clamp(3rem, 6vw, 4.5rem);
}
.footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 1fr));
    gap: clamp(2rem, 4vw, 3.5rem);
    padding-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
@media (max-width: 820px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-grid h2 { font-size: 1.5rem; }
.footer-grid p { color: var(--ink-2); font-size: .95rem; margin-top: .9rem; max-width: 40ch; }
.footer-grid h3 {
    font-family: var(--mono);
    font-size: var(--f-mono);
    font-weight: 500;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 1rem;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.footer-grid ul a, .footer-grid ul li { color: var(--ink-2); font-size: .93rem; text-decoration: none; }
.footer-grid ul a:hover { color: var(--accent-ink); }

.footer-bar {
    border-top: 1px solid var(--rule);
    padding-block: 1.3rem;
}
.footer-bar .shell {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .8rem;
    font-family: var(--mono);
    font-size: var(--f-mono);
    letter-spacing: .06em;
    color: var(--ink-3);
}
.footer-bar a { color: var(--ink-3); text-decoration: none; }
.footer-bar a:hover { color: var(--accent-ink); }

/* ponytail: sin animaciones de aparición al hacer scroll. Un fade-in con
   animation-timeline deja el contenido en opacity:0 si el timeline no resuelve
   (pasa al imprimir y al capturar la página completa). No vale el riesgo de
   ocultar el sitio entero a cambio de un efecto decorativo. */