:root {
    --ink: #071827;
    --ink-2: #102f44;
    --blue: #1f6feb;
    --teal: #0f8f8c;
    --green: #25865c;
    --gold: #c98918;
    --clay: #b95d35;
    --paper: #f5f8fb;
    --mist: #e8f0f6;
    --white: #ffffff;
    --muted: #607184;
    --line: rgba(10, 38, 58, .14);
    --line-dark: rgba(255, 255, 255, .16);
    --shadow: 0 26px 70px rgba(7, 24, 39, .18);
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 92px;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0;
    overflow-x: hidden;
}

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

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

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.boot {
    min-height: 100vh;
    display: grid;
    place-items: center;
    gap: 8px;
    text-align: center;
    color: var(--ink);
}

.boot strong,
.boot span {
    display: block;
}

.site-header {
    position: fixed;
    z-index: 50;
    top: 0;
    left: 0;
    right: 0;
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 14px 34px;
    color: var(--white);
    transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.site-header--scrolled {
    background: rgba(4, 18, 31, .92);
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    box-shadow: 0 16px 50px rgba(0, 0, 0, .24);
    backdrop-filter: blur(18px);
}

.brand {
    min-width: 212px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand__mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, .34);
    border-radius: 8px;
    background: rgba(255, 255, 255, .14);
    color: var(--white);
    font-weight: 900;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 18px;
    line-height: 1.1;
}

.brand small {
    color: rgba(255, 255, 255, .72);
    font-size: 12px;
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
}

.top-nav a {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, .15);
    border-radius: 8px;
    color: rgba(255, 255, 255, .86);
    background: rgba(255, 255, 255, .08);
    font-size: 14px;
    font-weight: 760;
    line-height: 1.15;
}

.top-nav a:hover,
.top-nav a:focus-visible {
    color: var(--white);
    background: rgba(255, 255, 255, .17);
}

.top-nav .nav-contact {
    color: #061523;
    border-color: rgba(255, 255, 255, .08);
    background: var(--gold);
}

.top-nav i,
.button i,
.contact-facts i {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
}

.hero {
    position: relative;
    min-height: 86vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 118px 7% 112px;
    color: var(--white);
    background-position: center;
    background-size: cover;
}

.hero::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 130px;
    background: linear-gradient(180deg, transparent, var(--paper));
    pointer-events: none;
}

.hero--sistinf {
    background-image:
        linear-gradient(90deg, rgba(3, 13, 24, .96) 0%, rgba(5, 25, 43, .82) 42%, rgba(5, 25, 43, .28) 76%),
        url("assets/sistinf-hero.webp");
}

.hero__copy {
    position: relative;
    z-index: 2;
    max-width: 780px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--gold);
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
}

.hero h1 {
    margin: 0;
    font-size: 76px;
    line-height: .96;
    letter-spacing: 0;
}

.hero__lead {
    max-width: 720px;
    margin: 24px 0 0;
    color: rgba(255, 255, 255, .86);
    font-size: 22px;
}

.hero__actions,
.product-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 12px 17px;
    font-weight: 850;
    line-height: 1.15;
    text-align: center;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button--primary {
    color: #061523;
    background: var(--gold);
    box-shadow: 0 18px 42px rgba(201, 137, 24, .28);
}

.button--ghost {
    color: var(--white);
    border-color: rgba(255, 255, 255, .34);
    background: rgba(255, 255, 255, .08);
}

.button--quiet {
    color: var(--white);
    border-color: rgba(255, 255, 255, .22);
    background: rgba(255, 255, 255, .1);
}

.hero__signal {
    position: absolute;
    z-index: 2;
    right: 7%;
    bottom: 42px;
    display: grid;
    grid-template-columns: repeat(3, minmax(116px, 1fr));
    gap: 8px;
    width: 460px;
    max-width: 40%;
}

.hero__signal span {
    min-height: 78px;
    display: grid;
    align-content: center;
    gap: 2px;
    border-radius: 8px;
    padding: 13px;
    border: 1px solid rgba(255, 255, 255, .22);
    color: rgba(255, 255, 255, .78);
    background: rgba(5, 22, 42, .52);
    backdrop-filter: blur(14px);
    font-size: 13px;
    font-weight: 750;
}

.hero__signal b {
    color: var(--white);
    font-size: 15px;
}

.proof-strip {
    position: relative;
    z-index: 3;
    width: min(1120px, calc(100% - 44px));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    margin: -50px auto 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
    background: var(--line);
}

.proof-strip article {
    min-height: 112px;
    display: grid;
    align-content: center;
    gap: 6px;
    padding: 20px;
    background: var(--white);
}

.proof-strip strong {
    color: var(--teal);
    font-size: 28px;
    line-height: 1;
}

.proof-strip span {
    color: var(--muted);
    font-size: 14px;
}

.band,
.product-section,
.lab-section,
.contact-section {
    padding: 96px 7%;
}

.band--paper {
    background: var(--paper);
}

.section-head {
    max-width: 860px;
    margin-bottom: 34px;
}

.section-head--split {
    max-width: none;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
    gap: 36px;
    align-items: end;
}

.section-head h2,
.model-band__copy h2,
.product-section__copy h2,
.contact-section__info h2 {
    margin: 0;
    font-size: 42px;
    line-height: 1.08;
    letter-spacing: 0;
}

.section-head p:not(.eyebrow),
.model-band__copy p,
.product-section__copy p,
.contact-section__info p {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 18px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.service-card {
    min-height: 286px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
    background: var(--white);
}

.service-card__icon,
.feature-row span,
.principle-row span {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: rgba(15, 143, 140, .1);
    color: var(--teal);
}

.service-card__icon i,
.feature-row i,
.principle-row i {
    width: 24px;
    height: 24px;
}

.service-card h3,
.feature-row h3,
.principle-row h3,
.lab-copy h3 {
    margin: 0 0 6px;
    font-size: 21px;
    line-height: 1.18;
    letter-spacing: 0;
}

.service-card p,
.feature-row p,
.principle-row p,
.lab-copy p {
    margin: 0;
    color: var(--muted);
}

.model-band {
    display: grid;
    grid-template-columns: minmax(320px, .9fr) minmax(340px, 1fr);
    gap: 52px;
    align-items: center;
    padding: 96px 7%;
    background: var(--white);
}

.model-band__media {
    min-height: 520px;
    border-radius: 8px;
    background-image:
        linear-gradient(180deg, rgba(7, 24, 39, .02), rgba(7, 24, 39, .12)),
        url("assets/sistinf-hero.webp");
    background-position: center;
    background-size: cover;
    box-shadow: var(--shadow);
}

.principle-list,
.feature-list {
    display: grid;
    gap: 16px;
    margin-top: 28px;
}

.principle-row,
.feature-row {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.product-section {
    display: grid;
    grid-template-columns: minmax(340px, .88fr) minmax(340px, 1.12fr);
    gap: 48px;
    align-items: center;
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(31, 111, 235, .2), transparent 42%),
        linear-gradient(180deg, var(--ink-2), var(--ink));
}

.product-section .eyebrow {
    color: #f2b84a;
}

.product-section__copy p,
.product-section .feature-row p {
    color: rgba(255, 255, 255, .76);
}

.product-section .feature-row span {
    color: #f2b84a;
    background: rgba(242, 184, 74, .13);
}

.product-lead {
    font-size: 20px;
}

.product-figure {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line-dark);
    border-radius: 8px;
    background: rgba(255, 255, 255, .06);
    box-shadow: 0 28px 80px rgba(0, 0, 0, .28);
}

.product-figure img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

.product-figure figcaption {
    padding: 16px 18px;
    color: rgba(255, 255, 255, .76);
    font-size: 14px;
}

.lab-section {
    background:
        linear-gradient(90deg, rgba(185, 93, 53, .08), transparent 45%),
        var(--mist);
}

.lab-layout {
    display: grid;
    grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
    gap: 36px;
    align-items: center;
}

.tic-board {
    aspect-ratio: 1;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    border-radius: 8px;
    padding: 16px;
    background: var(--ink);
    box-shadow: var(--shadow);
}

.tic-board span {
    min-width: 0;
    min-height: 0;
    display: grid;
    place-items: center;
    border-radius: 8px;
    color: rgba(255, 255, 255, .36);
    background: rgba(255, 255, 255, .08);
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
}

.tic-board .is-x {
    color: var(--white);
    background: var(--teal);
}

.tic-board .is-o {
    color: #241402;
    background: var(--gold);
}

.lab-copy {
    max-width: 700px;
}

.mini-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.mini-tags span {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(7, 24, 39, .12);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--ink);
    background: var(--white);
    font-weight: 850;
}

.contact-section {
    display: grid;
    grid-template-columns: minmax(320px, .88fr) minmax(340px, 1.12fr);
    gap: 48px;
    align-items: start;
    background: var(--white);
}

.contact-facts {
    display: grid;
    gap: 12px;
    margin-top: 28px;
}

.contact-facts a,
.contact-facts span {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 820;
}

.contact-facts i {
    color: var(--teal);
}

.contact-form {
    display: grid;
    gap: 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 26px;
    background: var(--paper);
    box-shadow: var(--shadow);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.contact-form label {
    display: grid;
    gap: 7px;
    color: var(--ink-2);
    font-size: 14px;
    font-weight: 820;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    min-height: 46px;
    border: 1px solid rgba(7, 24, 39, .18);
    border-radius: 8px;
    padding: 11px 12px;
    color: var(--ink);
    background: var(--white);
    outline: none;
}

.contact-form textarea {
    min-height: 134px;
    resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(15, 143, 140, .14);
}

.contact-form .button {
    width: fit-content;
    min-width: 190px;
}

.form-status {
    margin: -2px 0 0;
    color: var(--green);
    font-weight: 820;
}

.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 34px 7%;
    color: rgba(255, 255, 255, .76);
    background: #04121f;
}

.site-footer strong,
.site-footer span {
    display: block;
}

.site-footer strong {
    color: var(--white);
    font-size: 18px;
}

.privacy-page {
    min-height: 100vh;
    background: var(--paper);
}

.privacy-hero {
    padding: 88px 7% 54px;
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(31, 111, 235, .26), transparent 44%),
        linear-gradient(180deg, var(--ink-2), var(--ink));
}

.privacy-hero h1 {
    max-width: 920px;
    margin: 0;
    font-size: 54px;
    line-height: 1.02;
}

.privacy-hero p:not(.eyebrow) {
    margin: 18px 0 0;
    color: rgba(255, 255, 255, .78);
    font-size: 18px;
}

.privacy-content {
    width: min(900px, calc(100% - 44px));
    margin: 0 auto;
    padding: 54px 0 82px;
}

.privacy-content h2 {
    margin: 34px 0 8px;
    color: var(--ink);
    font-size: 26px;
    line-height: 1.14;
}

.privacy-content h2:first-child {
    margin-top: 0;
}

.privacy-content p {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 17px;
}

.privacy-content a {
    color: var(--blue);
    font-weight: 820;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 14px;
}

.footer-links a:hover {
    color: var(--white);
}

@media (max-width: 1120px) {
    .site-header {
        align-items: flex-start;
        padding: 12px 22px;
    }

    .service-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero__signal {
        max-width: 46%;
    }
}

@media (max-width: 930px) {
    .hero {
        min-height: 90vh;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 120px 22px 86px;
        background-image:
            linear-gradient(180deg, rgba(3, 13, 24, .96) 0%, rgba(5, 25, 43, .78) 58%, rgba(5, 25, 43, .54) 100%),
            url("assets/sistinf-hero.webp");
        background-position: center right;
    }

    .hero h1 {
        font-size: 58px;
    }

    .hero__lead {
        font-size: 19px;
    }

    .hero__signal {
        position: relative;
        right: auto;
        bottom: auto;
        width: 100%;
        max-width: 620px;
        margin-top: 34px;
    }

    .proof-strip,
    .section-head--split,
    .model-band,
    .product-section,
    .lab-layout,
    .contact-section {
        grid-template-columns: 1fr;
    }

    .model-band,
    .product-section,
    .lab-section,
    .contact-section,
    .band {
        padding: 72px 22px;
    }

    .model-band__media {
        min-height: 360px;
    }

    .product-figure img {
        height: 340px;
    }
}

@media (max-width: 720px) {
    body {
        font-size: 15px;
    }

    .site-header {
        position: absolute;
        width: 100%;
        display: grid;
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .brand {
        min-width: 0;
    }

    .top-nav {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        justify-content: stretch;
    }

    .top-nav a {
        min-width: 0;
        min-height: 38px;
        padding: 8px 9px;
        font-size: 13px;
    }

    .top-nav .nav-contact {
        grid-column: span 2;
    }

    .hero {
        min-height: 96vh;
        padding-top: 178px;
        padding-bottom: 72px;
    }

    .hero h1 {
        font-size: 42px;
        line-height: 1;
    }

    .hero__lead {
        font-size: 17px;
    }

    .hero__actions,
    .product-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr;
    }

    .button,
    .contact-form .button {
        width: 100%;
    }

    .hero__signal,
    .proof-strip,
    .service-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .proof-strip {
        margin-top: -34px;
    }

    .section-head h2,
    .model-band__copy h2,
    .product-section__copy h2,
    .contact-section__info h2 {
        font-size: 31px;
    }

    .section-head p:not(.eyebrow),
    .model-band__copy p,
    .product-section__copy p,
    .contact-section__info p {
        font-size: 16px;
    }

    .service-card {
        min-height: 0;
    }

    .product-figure img {
        height: 280px;
    }

    .tic-board {
        max-width: 360px;
        margin: 0 auto;
    }

    .tic-board span {
        font-size: 38px;
    }

    .site-footer {
        display: grid;
        align-items: start;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 430px) {
    .brand__mark {
        width: 38px;
        height: 38px;
    }

    .top-nav a {
        font-size: 12px;
    }

    .hero {
        padding-top: 186px;
    }

    .hero h1 {
        font-size: 38px;
    }

    .proof-strip article {
        min-height: 96px;
        padding: 16px;
    }

    .contact-form {
        padding: 20px;
    }
}