/**
 * Standard Baseline - one page website.
 *
 * Light, editorial layout: white paper, hairline rules, square corners, one accent colour
 * taken from the logo and used sparingly. Mobile first: the base rules target small
 * screens, media queries scale up from there.
 */

/* ---------------------------------------------------------------- Design tokens */

:root {
    color-scheme: light;

    --color-paper: #ffffff;
    --color-paper-alt: #f4f5f6;
    --color-ink: #10161c;
    --color-ink-soft: #57636f;
    --color-line: #e0e4e8;
    --color-line-strong: #c3ccd4;

    /* Accent, from the logo. The dark tone carries text, the bright one only decorates. */
    --color-accent: #006699;
    --color-accent-bright: #0083cd;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --space-section: 4.5rem;
    --header-height: 5.75rem;
}

/* ---------------------------------------------------------------- Reset */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1,
h2,
h3,
p {
    margin: 0;
}

button {
    font: inherit;
    color: inherit;
    cursor: pointer;
}

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

[hidden] {
    display: none !important;
}

/* ---------------------------------------------------------------- Layout helpers */

.container {
    width: 100%;
    max-width: 1180px;
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.container--narrow {
    max-width: 760px;
}

.section {
    padding-block: var(--space-section);
    border-top: 1px solid var(--color-line);
}

.section--alt {
    background-color: var(--color-paper-alt);
}

.section__head {
    max-width: 660px;
    margin-bottom: 3rem;
}

.section__title {
    font-size: clamp(1.75rem, 5vw, 2.6rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.025em;
    margin-bottom: 1rem;
}

.section__lead {
    color: var(--color-ink-soft);
    font-size: 1.06rem;
}

/* Small uppercase label opening each section, the only systematic use of the accent. */
.eyebrow {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.1rem;
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 1.75rem;
    height: 2px;
    background-color: var(--color-accent-bright);
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: 100;
    padding: 0.7rem 1.1rem;
    background-color: var(--color-ink);
    color: var(--color-paper);
    font-weight: 600;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 1rem;
}

/* ---------------------------------------------------------------- Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.1rem;
    padding: 0.75rem 1.75rem;
    border: 1px solid transparent;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

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

.btn--ghost {
    border-color: var(--color-line-strong);
    background-color: transparent;
    color: var(--color-ink);
}

.btn--ghost:hover {
    border-color: var(--color-ink);
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: var(--color-paper);
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.site-header.is-scrolled {
    border-bottom-color: var(--color-line);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: var(--header-height);
}

.brand__logo {
    width: auto;
    height: 3.5rem;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0.6rem;
    border: 1px solid var(--color-line-strong);
    background-color: transparent;
}

.nav-toggle__bar {
    display: block;
    height: 2px;
    background-color: var(--color-ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-is-open .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-is-open .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.nav-is-open .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile navigation: a panel dropping under the sticky header. */
.nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    display: none;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem 1.25rem 2rem;
    background-color: var(--color-paper);
    border-block: 1px solid var(--color-line);
}

.nav-is-open .nav {
    display: flex;
}

.nav__list {
    display: flex;
    flex-direction: column;
}

.nav__link {
    display: block;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--color-line);
    color: var(--color-ink);
    font-weight: 500;
    transition: color 0.18s ease;
}

.nav__link:hover {
    color: var(--color-accent);
}

.nav__link--cta {
    margin-top: 1.25rem;
    padding: 0.85rem 1.5rem;
    border: 0;
    background-color: var(--color-ink);
    color: var(--color-paper);
    text-align: center;
}

.nav__link--cta:hover {
    background-color: var(--color-accent);
    color: var(--color-paper);
}

/* Square segmented control rather than a pill. */
.lang-switch {
    display: inline-flex;
    align-self: flex-start;
    border: 1px solid var(--color-line-strong);
}

.lang-switch__btn {
    min-width: 2.9rem;
    padding: 0.4rem 0.75rem;
    border: 0;
    background: transparent;
    color: var(--color-ink-soft);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    transition: background-color 0.18s ease, color 0.18s ease;
}

.lang-switch__btn + .lang-switch__btn {
    border-left: 1px solid var(--color-line-strong);
}

.lang-switch__btn.is-active {
    background-color: var(--color-ink);
    color: var(--color-paper);
}

/* ---------------------------------------------------------------- Hero */

.hero {
    padding-block: 3.5rem 4rem;
}

.hero__title {
    font-size: clamp(2.15rem, 7.5vw, 4.1rem);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.035em;
    margin-bottom: 1.5rem;
}

.hero__title-soft {
    color: var(--color-ink-soft);
}

.hero__lead {
    max-width: 640px;
    color: var(--color-ink-soft);
    font-size: 1.1rem;
}

.hero__actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2.25rem;
}

.hero__points {
    display: grid;
    gap: 0;
    margin-top: 3rem;
    border-top: 1px solid var(--color-line);
}

.hero__point {
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--color-line);
    color: var(--color-ink);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ---------------------------------------------------------------- Service grid */

/* The 1px gap over a line coloured background draws the grid rules itself. */
.grid {
    display: grid;
    gap: 1px;
    background-color: var(--color-line);
    border: 1px solid var(--color-line);
}

.card {
    padding: 2rem 1.75rem 2.25rem;
    background-color: var(--color-paper);
    transition: background-color 0.18s ease;
}

.card:hover {
    background-color: var(--color-paper-alt);
}

.card__icon {
    display: block;
    margin-bottom: 1.25rem;
    color: var(--color-accent);
}

.card__icon svg {
    width: 1.6rem;
    height: 1.6rem;
}

.card__title {
    font-size: 1.12rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0.65rem;
}

.card__text {
    color: var(--color-ink-soft);
    font-size: 0.97rem;
}

.section--alt .card {
    background-color: var(--color-paper-alt);
}

.section--alt .card:hover {
    background-color: var(--color-paper);
}

/* ---------------------------------------------------------------- AI pledge */

.split {
    display: grid;
    gap: 3rem;
}

.pledge {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--color-line-strong);
}

.pledge__item {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-line-strong);
}

.pledge__title {
    position: relative;
    padding-left: 1.75rem;
    font-size: 1.02rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.pledge__title::before {
    content: "";
    position: absolute;
    top: 0.45em;
    left: 0;
    width: 0.85rem;
    height: 0.45rem;
    border-left: 2px solid var(--color-accent-bright);
    border-bottom: 2px solid var(--color-accent-bright);
    transform: rotate(-45deg);
}

.pledge__text {
    padding-left: 1.75rem;
    color: var(--color-ink-soft);
    font-size: 0.95rem;
}

/* ---------------------------------------------------------------- Method */

.steps {
    display: grid;
    gap: 2.5rem;
}

.step {
    padding-top: 1.1rem;
    border-top: 2px solid var(--color-ink);
}

.step__num {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.step__title {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}

.step__text {
    color: var(--color-ink-soft);
    font-size: 0.95rem;
}

/* ---------------------------------------------------------------- Audience */

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag {
    padding: 0.6rem 1.1rem;
    border: 1px solid var(--color-line-strong);
    background-color: var(--color-paper);
    color: var(--color-ink);
    font-size: 0.93rem;
    font-weight: 500;
    transition: border-color 0.18s ease, color 0.18s ease;
}

.tag:hover {
    border-color: var(--color-ink);
    color: var(--color-accent);
}

/* ---------------------------------------------------------------- FAQ */

.faq {
    border-top: 1px solid var(--color-line-strong);
}

.faq__item {
    padding: 1.35rem 0;
    border-bottom: 1px solid var(--color-line-strong);
}

.faq__question {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
    font-size: 1.02rem;
    font-weight: 600;
    list-style: none;
    cursor: pointer;
}

.faq__question::-webkit-details-marker {
    display: none;
}

.faq__question::after {
    content: "";
    flex-shrink: 0;
    width: 0.85rem;
    height: 0.85rem;
    margin-top: 0.4rem;
    background-color: currentColor;
    /* A plus sign drawn as a mask, so it stays crisp and turns into a minus when open. */
    clip-path: polygon(45% 0, 55% 0, 55% 45%, 100% 45%, 100% 55%, 55% 55%, 55% 100%, 45% 100%, 45% 55%, 0 55%, 0 45%, 45% 45%);
    color: var(--color-accent);
    transition: transform 0.2s ease;
}

.faq__item[open] .faq__question::after {
    transform: rotate(45deg);
}

.faq__answer {
    max-width: 58ch;
    margin-top: 0.85rem;
    color: var(--color-ink-soft);
    font-size: 0.97rem;
}

/* ---------------------------------------------------------------- Contact */

.section--contact {
    background-color: var(--color-paper-alt);
}

.contact {
    padding: 2.5rem 1.5rem;
    border: 1px solid var(--color-line-strong);
    background-color: var(--color-paper);
    text-align: center;
}

.contact .eyebrow {
    justify-content: center;
}

.contact__actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Holds the contact address, which JavaScript injects only once the visitor asks for it. */
.contact__mail {
    color: var(--color-accent);
    font-weight: 600;
    word-break: break-word;
}

.contact__mail a:hover {
    text-decoration: underline;
}

/* ---------------------------------------------------------------- Footer */

.site-footer {
    padding-block: 2.5rem;
    border-top: 1px solid var(--color-line);
}

.site-footer__inner {
    display: grid;
    gap: 2rem;
}

.site-footer__mark {
    height: 3.4rem;
    width: auto;
    margin-bottom: 1rem;
}

.site-footer__baseline,
.site-footer__legal {
    color: var(--color-ink-soft);
    font-size: 0.9rem;
}

.site-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.75rem;
}

.site-footer__links a {
    color: var(--color-ink);
    font-size: 0.92rem;
    font-weight: 500;
    transition: color 0.18s ease;
}

.site-footer__links a:hover {
    color: var(--color-accent);
}

.site-footer__legal {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-line);
}

/* ---------------------------------------------------------------- Reveal on scroll */

.reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* ---------------------------------------------------------------- Breakpoints */

@media (min-width: 600px) {
    .hero__actions {
        flex-direction: row;
    }

    .hero__points {
        grid-template-columns: repeat(3, 1fr);
        gap: 1px;
        background-color: var(--color-line);
        border-bottom: 1px solid var(--color-line);
    }

    .hero__point {
        padding: 1rem 1.25rem 1rem 0;
        border-bottom: 0;
        background-color: var(--color-paper);
    }

    .hero__point + .hero__point {
        padding-left: 1.25rem;
    }

    .contact {
        padding: 3.5rem 2.5rem;
    }

    .contact__actions {
        flex-direction: row;
        justify-content: center;
        gap: 2rem;
    }

    .grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 2.5rem 2rem;
    }

    .pledge {
        grid-template-columns: repeat(2, 1fr);
        column-gap: 2.5rem;
    }

    .site-footer__inner {
        grid-template-columns: 1fr auto;
        align-items: start;
    }

    .site-footer__links {
        justify-content: flex-end;
    }

    .site-footer__legal {
        grid-column: 1 / -1;
        justify-content: space-between;
    }
}

@media (min-width: 900px) {
    :root {
        --space-section: 7rem;
        --header-height: 6.75rem;
    }

    .container {
        padding-inline: 2.5rem;
    }

    .nav-toggle {
        display: none;
    }

    .nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2.25rem;
        padding: 0;
        border: 0;
        background: transparent;
    }

    .nav__list {
        flex-direction: row;
        align-items: center;
        gap: 2rem;
    }

    .nav__link {
        padding: 0;
        border-bottom: 0;
        font-size: 0.94rem;
    }

    .nav__link--cta {
        margin-top: 0;
        padding: 0.6rem 1.25rem;
    }

    .lang-switch {
        align-self: center;
    }

    .brand__logo {
        height: 4.75rem;
    }

    .grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps {
        grid-template-columns: repeat(4, 1fr);
        gap: 2rem;
    }

    .split {
        grid-template-columns: 1fr 1.1fr;
        align-items: start;
        gap: 5rem;
    }

    .pledge {
        grid-template-columns: 1fr;
        column-gap: 0;
    }

    .hero {
        padding-block: 6rem 6.5rem;
    }

    .site-footer__mark {
        height: 4rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}