/* ==========================================================================
   СТРИВИНГ СТРОЙ — design system
   Industrial dark theme · Oswald headings + IBM Plex Sans body
   ========================================================================== */

:root {
    --bg:          #151412;
    --surface:     #1c1a17;
    --surface-2:   #232019;
    --line:        rgba(240, 236, 228, 0.12);
    --line-strong: rgba(240, 236, 228, 0.22);
    --ink:         #f3efe7;
    --ink-dim:     #aca69b;
    --ink-faint:   #736d63;
    --accent:      #ec8c1e;
    --accent-hover:#ffa532;
    --accent-ink:  #17130c;
    --blueprint:   #2b3038;

    --font-head: 'Oswald', 'Arial Narrow', sans-serif;
    --font-body: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

    --container: 1200px;
    --gutter: clamp(1.25rem, 4vw, 2.5rem);
    --radius: 3px;
    --header-h: 80px;

    --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.7);
    --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* --- Reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--ink);
    line-height: 1.7;
    font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}
img, svg, iframe { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
input, textarea { font: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* --- Typography ---------------------------------------------------------- */
h1, h2, h3, h4 {
    font-family: var(--font-head);
    font-weight: 600;
    line-height: 1.06;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    text-wrap: balance;
}
p { text-wrap: pretty; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 0.8125rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.1rem;
}
.eyebrow::before {
    content: "";
    width: 28px;
    height: 2px;
    background: var(--accent);
}
.eyebrow--light { color: var(--accent); }

.lead { font-size: 1.125rem; color: var(--ink); }
.note {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-top: 2.5rem;
    color: var(--ink-dim);
    font-size: 0.95rem;
    border-left: 2px solid var(--accent);
    padding-left: 1rem;
}
.note .ico { color: var(--accent); flex: none; }

/* --- Layout -------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}
.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section--alt { background: var(--surface); border-block: 1px solid var(--line); }

.section__head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem 3rem;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.section__title {
    font-size: clamp(1.75rem, 1.3rem + 2.2vw, 3rem);
}
.section__title--sm { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); margin-bottom: 1.5rem; }
.section__intro { max-width: 42ch; color: var(--ink-dim); }

.ico { flex: none; vertical-align: middle; }
.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-link {
    position: fixed; top: -60px; left: 1rem; z-index: 1000;
    background: var(--accent); color: var(--accent-ink);
    padding: 0.6rem 1rem; font-weight: 600; border-radius: var(--radius);
    transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* --- Buttons ------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.9rem 1.6rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    white-space: nowrap;
    transition: background 0.2s var(--ease), color 0.2s var(--ease),
                border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 0.6rem 1.1rem; font-size: 0.875rem; }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: var(--accent-hover); }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); background: rgba(255, 255, 255, 0.04); }
.btn--outline-dark { border-color: rgba(0, 0, 0, 0.35); color: var(--accent-ink); }
.btn--outline-dark:hover { background: rgba(0, 0, 0, 0.12); }
.btn .ico { transition: transform 0.2s var(--ease); }
.btn:hover .ico { transform: translateX(3px); }

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-head);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--ink);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.link-arrow:hover { color: var(--accent); border-color: var(--accent); }
.link-arrow .ico { transition: transform 0.2s var(--ease); }
.link-arrow:hover .ico { transform: translateX(3px); }

/* --- Topbar -------------------------------------------------------------- */
.topbar {
    background: #100f0d;
    border-bottom: 1px solid var(--line);
    font-size: 0.85rem;
}
.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 42px;
}
.topbar__contacts { display: flex; align-items: center; gap: 1.75rem; }
.topbar__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--ink-dim);
    transition: color 0.2s var(--ease);
}
a.topbar__link:hover { color: var(--ink); }
.topbar__link .ico { color: var(--accent); }
.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-head);
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--ink-faint);
}
.lang-switch a { color: var(--ink-dim); padding: 0.15rem 0.15rem; transition: color 0.2s var(--ease); }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a.is-active { color: var(--accent); }

/* --- Header / nav -------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(21, 20, 18, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.site-header.is-scrolled {
    background: rgba(16, 15, 13, 0.96);
    border-color: var(--line-strong);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-h);
    gap: 1.5rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.8rem; }
.brand__logo { height: 50px; width: auto; display: block; flex: none; }
.brand__mark {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    background: var(--accent);
    color: var(--accent-ink);
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    border-radius: var(--radius);
    clip-path: polygon(0 0, 100% 0, 100% 78%, 82% 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.1; gap: 0.32rem; }
.brand__name {
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 1.35rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}
.brand__sub {
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-faint);
    white-space: nowrap;
}
.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: 0.35rem; }
.nav__link {
    display: inline-block;
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-dim);
    padding: 0.5rem 0.7rem;
    position: relative;
    white-space: nowrap;
    transition: color 0.2s var(--ease);
}
.nav__link::after {
    content: "";
    position: absolute;
    left: 0.7rem;
    right: 0.7rem;
    bottom: 0.35rem;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--ink); }
.nav__cta-item { margin-left: 0.5rem; }
.nav__lang-item { display: none; }
.nav-toggle { display: none; }
.nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 116;
    background: rgba(8, 8, 7, 0.6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
    display: none;
}

/* --- Hero ---------------------------------------------------------------- */
.hero {
    position: relative;
    background:
        radial-gradient(120% 90% at 85% 5%, rgba(236, 140, 30, 0.14), transparent 55%),
        linear-gradient(180deg, var(--bg) 0%, #100f0d 100%);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}
.hero__bg {
    position: absolute;
    inset: 0;
    color: rgba(240, 236, 228, 0.06);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 40%);
    mask-image: linear-gradient(90deg, transparent, #000 40%);
}
.hero__skyline { position: absolute; right: 0; bottom: 0; width: min(70%, 900px); height: auto; }
.hero__inner { position: relative; padding-block: clamp(4rem, 11vw, 8.5rem); }
.hero__title {
    font-size: clamp(2.5rem, 1.6rem + 4.4vw, 5rem);
    font-weight: 700;
    max-width: 16ch;
    margin-bottom: 1.5rem;
}
.hero__lead { max-width: 52ch; font-size: 1.1875rem; color: var(--ink-dim); margin-bottom: 2.25rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.hero__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--line);
    max-width: 720px;
}
.hero__badges li {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    color: var(--ink-dim);
}
.hero__badges .ico { color: var(--accent); }

/* --- Page hero ----------------------------------------------------------- */
.page-hero {
    padding-block: clamp(3rem, 7vw, 5.5rem);
    background:
        radial-gradient(90% 120% at 90% 0%, rgba(236, 140, 30, 0.1), transparent 55%),
        var(--surface);
    border-bottom: 1px solid var(--line);
}
.page-hero__title { font-size: clamp(2.25rem, 1.5rem + 3.4vw, 4rem); font-weight: 700; margin-bottom: 1.25rem; }
.page-hero__lead { max-width: 58ch; font-size: 1.125rem; color: var(--ink-dim); }

/* --- Split --------------------------------------------------------------- */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: clamp(2rem, 5vw, 4.5rem);
}
.split__body .section__title { margin-bottom: 1.25rem; }
.split__body .lead { margin-bottom: 1rem; }
.split__body .link-arrow { margin-top: 1.75rem; }
.ticks { display: grid; gap: 0.85rem; margin-top: 1.5rem; }
.ticks li { display: flex; align-items: flex-start; gap: 0.75rem; }
.ticks .ico { color: var(--accent); margin-top: 0.3rem; }

/* --- Placeholder media --------------------------------------------------- */
.placeholder-media {
    position: relative;
    display: grid;
    place-items: center;
    aspect-ratio: 4 / 3;
    background:
        linear-gradient(135deg, var(--surface-2), #16151a),
        var(--blueprint);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--ink-faint);
    overflow: hidden;
}
.placeholder-media::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 34px 34px;
    -webkit-mask-image: radial-gradient(120% 120% at 50% 40%, #000, transparent 78%);
    mask-image: radial-gradient(120% 120% at 50% 40%, #000, transparent 78%);
    opacity: 0.7;
}
.placeholder-media::after {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 4px;
    background: repeating-linear-gradient(45deg, var(--accent) 0 14px, #17130c 14px 28px);
    opacity: 0.85;
}
.placeholder-media__icon { position: relative; color: var(--ink-faint); opacity: 0.65; }
.placeholder-media__tag {
    position: absolute;
    bottom: 0.9rem;
    right: 1rem;
    font-family: var(--font-head);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

/* --- Services grid (home) ------------------------------------------------ */
.services {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}
.service { background: var(--bg); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section--alt .service { background: var(--surface); }
.service__link {
    position: relative;
    display: grid;
    gap: 0.5rem;
    height: 100%;
    padding: 1.75rem 1.5rem 1.6rem;
    transition: background 0.25s var(--ease);
}
.service__link:hover { background: var(--surface-2); }
.service__num {
    font-family: var(--font-head);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--ink-faint);
}
.service__icon { color: var(--accent); margin-bottom: 0.35rem; }
.service__title {
    font-family: var(--font-head);
    font-weight: 500;
    font-size: 1.15rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    line-height: 1.15;
}
.service__desc { font-size: 0.9rem; color: var(--ink-dim); line-height: 1.6; }
.service__go {
    color: var(--ink-faint);
    margin-top: 0.4rem;
    transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.service__link:hover .service__go { color: var(--accent); transform: translate(3px, -3px); }

/* --- Service cards (services page) -------------------------------------- */
.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}
.service-card {
    display: flex;
    flex-direction: column;
    background: var(--bg);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: clamp(1.5rem, 3vw, 2.1rem);
    scroll-margin-top: calc(var(--header-h) + 20px);
    transition: background 0.25s var(--ease);
}
.service-card:hover { background: var(--surface); }
.service-card__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.1rem;
}
.service-card__icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    background: var(--surface-2);
    color: var(--accent);
    transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.service-card:hover .service-card__icon { background: var(--accent); color: var(--accent-ink); }
.service-card__num {
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--line-strong);
    line-height: 1;
}
.service-card__title { font-size: clamp(1.2rem, 1rem + 0.6vw, 1.5rem); margin-bottom: 0.6rem; }
.service-card__desc { color: var(--ink-dim); font-size: 0.95rem; line-height: 1.6; }
.service-card__points {
    display: grid;
    gap: 0.55rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
}
.service-card__points li { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; }
.service-card__points .ico { color: var(--accent); flex-shrink: 0; }
.service-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: auto;
    padding-top: 1.6rem;
    font-family: var(--font-head);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-dim);
    transition: color 0.2s var(--ease), gap 0.2s var(--ease);
}
.service-card__cta:hover { color: var(--accent); gap: 0.7rem; }

/* --- Why us -------------------------------------------------------------- */
.why {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(1.25rem, 3vw, 2rem);
}
.why__item {
    position: relative;
    padding: 2rem 1.5rem 1.75rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-top: 3px solid var(--accent);
    border-radius: var(--radius);
}
.section--alt .why__item { background: var(--bg); }
.why__num {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    font-family: var(--font-head);
    font-size: 0.85rem;
    color: var(--ink-faint);
}
.why__icon { color: var(--accent); margin-bottom: 1.1rem; }
.why__title { font-size: 1.25rem; font-weight: 500; margin-bottom: 0.65rem; }
.why__item p { font-size: 0.95rem; color: var(--ink-dim); }

/* --- Steps --------------------------------------------------------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.25rem, 3vw, 2rem); counter-reset: step; }
.step { position: relative; padding-top: 2.75rem; }
.step__num {
    display: block;
    font-family: var(--font-head);
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.85rem;
}
.step::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 46px;
    height: 3px;
    background: var(--line-strong);
}
.step__title { font-size: 1.2rem; font-weight: 500; margin-bottom: 0.5rem; }
.step p { font-size: 0.95rem; color: var(--ink-dim); }

/* --- Values -------------------------------------------------------------- */
.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.25rem, 3vw, 2rem); }
.value {
    padding: 1.75rem 1.5rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}
.value__icon {
    display: grid;
    place-items: center;
    width: 46px; height: 46px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    color: var(--accent);
    margin-bottom: 1.1rem;
}
.value__title { font-size: 1.2rem; font-weight: 500; margin-bottom: 0.5rem; }
.value p { font-size: 0.95rem; color: var(--ink-dim); }

/* --- Data list ----------------------------------------------------------- */
.data-list { border-top: 1px solid var(--line); max-width: 780px; }
.data-list__row {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 1.5rem;
    padding: 1.15rem 0;
    border-bottom: 1px solid var(--line);
}
.data-list__row dt {
    font-family: var(--font-head);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--ink-dim);
}
.data-list__row dd a { color: var(--accent); }
.data-list__person { display: block; }

/* --- Projects ------------------------------------------------------------ */
.projects { display: grid; gap: clamp(1.25rem, 3vw, 2rem); }
.projects--3 { grid-template-columns: repeat(3, 1fr); }
.project { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.project__media { aspect-ratio: 3 / 2; border: 0; border-radius: 0; }
.project__cap { display: grid; gap: 0.3rem; padding: 1.15rem 1.35rem 1.35rem; }
.project__cat {
    font-family: var(--font-head);
    font-size: 0.75rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
}
.project__title { font-family: var(--font-head); font-weight: 500; font-size: 1.15rem; text-transform: uppercase; }

/* --- CTA band ------------------------------------------------------------ */
.cta-band { background: var(--accent); color: var(--accent-ink); }
.cta-band__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding-block: clamp(2.75rem, 6vw, 4rem);
}
.cta-band__title { font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.5rem); font-weight: 700; margin-bottom: 0.5rem; }
.cta-band__text { max-width: 46ch; }
.cta-band__text p { opacity: 0.85; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.cta-band .btn--primary { background: var(--accent-ink); color: var(--ink); }
.cta-band .btn--primary:hover { background: #000; }

/* --- Contact ------------------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
    margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.form { display: grid; gap: 1.25rem; max-width: 620px; }
.form__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.field { display: grid; gap: 0.45rem; }
.field label {
    font-family: var(--font-head);
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: 0.9rem;
}
.field .req { color: var(--accent); }
.field .hint { color: var(--ink-faint); text-transform: none; letter-spacing: 0; font-size: 0.85rem; }
.field input, .field textarea {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    color: var(--ink);
    padding: 0.85rem 1rem;
    transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.field input:focus, .field textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--surface-2);
}
.field textarea { resize: vertical; min-height: 140px; }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: #e0533b; }
.field__err { color: #f08a76; font-size: 0.875rem; }
.form__privacy { font-size: 0.85rem; color: var(--ink-faint); }
.form button { justify-self: start; }
.form-alert {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-size: 0.98rem;
}
.form-alert--ok { background: rgba(60, 160, 90, 0.14); border: 1px solid rgba(60, 160, 90, 0.5); color: #a6e3b8; }
.form-alert--ok .ico { color: #6fce8c; }
.form-alert--err { background: rgba(224, 83, 59, 0.12); border: 1px solid rgba(224, 83, 59, 0.5); color: #f2a595; }

.contact-info { padding: 1.75rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.info-list { display: grid; gap: 1.4rem; }
.info-list li { display: flex; gap: 1rem; }
.info-list__ico {
    display: grid;
    place-items: center;
    width: 42px; height: 42px;
    flex: none;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    color: var(--accent);
}
.info-list__label {
    display: block;
    font-family: var(--font-head);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.15rem;
}
.info-list a:hover { color: var(--accent); }

.map { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.map iframe { width: 100%; height: 420px; border: 0; filter: grayscale(0.3) contrast(1.05); }

/* --- Footer -------------------------------------------------------------- */
.site-footer { background: #100f0d; border-top: 1px solid var(--line); }
.site-footer__grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
    gap: 2.5rem;
    padding-block: clamp(3rem, 6vw, 4.5rem);
}
.site-footer .brand--footer { margin-bottom: 1.35rem; }
.site-footer .brand__logo { height: 54px; }
.site-footer__brand p { color: var(--ink-dim); font-size: 0.95rem; max-width: 38ch; }
.site-footer__eik { margin-top: 1rem; color: var(--ink-faint); font-size: 0.9rem; }
.site-footer__eik strong { color: var(--ink-dim); }
.site-footer__title {
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    color: var(--ink-faint);
    margin-bottom: 1.25rem;
    font-weight: 500;
}
.site-footer__col ul { display: grid; gap: 0.7rem; }
.site-footer__col a { color: var(--ink-dim); font-size: 0.95rem; transition: color 0.2s var(--ease); }
.site-footer__col a:hover { color: var(--accent); }
.site-footer__contact li { display: flex; gap: 0.75rem; color: var(--ink-dim); font-size: 0.95rem; margin-bottom: 0.9rem; }
.site-footer__contact .ico { color: var(--accent); flex: none; margin-top: 0.15rem; }
.site-footer__contact small { color: var(--ink-faint); }
.site-footer__bar { border-top: 1px solid var(--line); }
.site-footer__bar-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem;
    padding-block: 1.4rem;
    color: var(--ink-faint);
    font-size: 0.85rem;
}

/* --- Reveal animation (only when JS is active, so no-JS still shows content) */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .js .reveal { opacity: 1; transform: none; }
}

/* --- Responsive ---------------------------------------------------------- */
@media (max-width: 1024px) {
    .services { grid-template-columns: repeat(2, 1fr); }
    .why, .steps, .values { grid-template-columns: repeat(2, 1fr); }
    .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
    .topbar__addr { display: none; }
    .topbar .lang-switch { display: none; }
    /* blur creates a containing block that would trap the fixed nav drawer */
    .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
    /* clip the off-canvas drawer so it can't add horizontal scroll */
    html { overflow-x: clip; }
    .nav-backdrop { display: block; }
    body.nav-open .nav-backdrop { opacity: 1; visibility: visible; pointer-events: auto; }
    .brand__logo { height: 46px; }
    .nav-toggle {
        display: grid;
        place-items: center;
        width: 46px; height: 46px;
        border: 1px solid var(--line-strong);
        border-radius: var(--radius);
        color: var(--ink);
        position: relative;
        z-index: 120;
    }
    .brand { position: relative; z-index: 115; }
    .nav-toggle__close { display: none; }
    .nav-toggle[aria-expanded="true"] .nav-toggle__open { display: none; }
    .nav-toggle[aria-expanded="true"] .nav-toggle__close { display: block; }
    .nav__list {
        position: fixed;
        inset: 0 0 0 auto;
        z-index: 118;
        width: min(320px, 82vw);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: #131210;
        border-left: 1px solid var(--line-strong);
        padding: calc(var(--header-h) + 1rem) 1.5rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s var(--ease);
        overflow-y: auto;
    }
    .nav__list.is-open { transform: none; }
    body.nav-open::before {
        content: "";
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.55);
        z-index: 90;
    }
    .nav__link { display: block; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
    .nav__link::after { display: none; }
    .nav__cta-item { margin: 1.25rem 0 0; }
    .nav__cta-item .btn { width: 100%; justify-content: center; }
    .nav__lang-item {
        display: block;
        margin-top: 1.25rem;
        padding-top: 1.25rem;
        border-top: 1px solid var(--line);
    }
    .lang-switch--menu { font-size: 1.05rem; gap: 0.75rem; }
    .lang-switch--menu a { padding: 0.35rem 0.5rem; }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .split { grid-template-columns: 1fr; }
    .split__media { order: -1; }
    .services { grid-template-columns: 1fr; }
    .why, .steps, .values, .projects--3 { grid-template-columns: 1fr; }
    .topbar__contacts { gap: 0.4rem 1rem; font-size: 0.8rem; flex-wrap: wrap; }
    .service-cards { grid-template-columns: 1fr; }
    .data-list__row { grid-template-columns: 1fr; gap: 0.35rem; }
    .cta-band__inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
    .brand__sub { display: none; }
    .hero__actions .btn { flex: 1 1 auto; justify-content: center; }
}