/* ==========================================================================
   CMSO Concrete Technology — strona firmowa cmso.bet
   Paleta i typografia wg księgi znaku: czerwień #d40a10, czerń #181716,
   font treściowy Montserrat.
   ========================================================================== */

@font-face {
    font-family: 'Montserrat CMSO';
    src: url('/cmso_website/static/src/fonts/montserrat-var.woff2') format('woff2-variations');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

:root {
    --red: #d40a10;
    --red-dark: #a5070c;
    --ink: #181716;
    --ink-2: #211f1d;
    --ink-3: #2c2a27;
    --concrete-050: #f4f3f0;
    --concrete-100: #e9e7e2;
    --concrete-200: #dcd9d3;
    --concrete-300: #c4c0b8;
    --concrete-500: #8c877f;
    --concrete-600: #6b665f;
    /* Tekst treści — wyższy kontrast niż dekoracyjne szarości betonu */
    --text-on-light: #43403a;
    --text-on-dark: #d9d6d0;

    --maxw: 1280px;
    --gut: clamp(1.25rem, 4vw, 4.5rem);
    --rule: rgba(24, 23, 22, 0.14);
    --rule-dark: rgba(255, 255, 255, 0.14);

    /* Ziarno betonu — nakładka szumu (bez plików zewnętrznych) */
    --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    -webkit-text-size-adjust: 100%;
    /* `clip` zamiast `hidden` — `hidden` na html/body robi z niego osobny
       kontener przewijania i psuje pozycjonowanie `position: fixed`. */
    overflow-x: clip;
}

body {
    margin: 0;
    background: var(--ink);
    color: var(--concrete-100);
    font-family: 'Montserrat CMSO', 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    font-weight: 400;
    font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 {
    margin: 0;
    font-weight: 800;
    line-height: 1.04;
    letter-spacing: -0.025em;
}

p { margin: 0; }

::selection { background: var(--red); color: #fff; }

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

.o_skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 999;
    background: var(--red);
    color: #fff;
    padding: 0.75rem 1.25rem;
    font-weight: 700;
}
.o_skip:focus { left: 0; }

/* ---------- Układ ---------------------------------------------------- */

.o_wrap {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: var(--gut);
}

.o_section {
    position: relative;
    padding-block: clamp(4.5rem, 9vw, 9rem);
    overflow: hidden;
}

.o_section--light {
    background: var(--concrete-100);
    color: var(--ink);
}

.o_section--dark {
    background: var(--ink);
    color: var(--concrete-100);
}

/* Ziarno na sekcjach */
.o_section::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--grain);
    background-size: 160px 160px;
    opacity: 0.05;
    mix-blend-mode: multiply;
    pointer-events: none;
}
.o_section--dark::after { mix-blend-mode: overlay; opacity: 0.07; }

/* ---------- Motyw ukośników (sygnet logo) ---------------------------- */

.o_slashes {
    display: inline-flex;
    gap: 0.35em;
    vertical-align: baseline;
}
.o_slashes i {
    display: block;
    width: 0.2em;
    height: 1em;
    background: var(--red);
    transform: skewX(-15deg);
}

.o_slash_field {
    position: absolute;
    inset-block: -10%;
    width: 34vw;
    max-width: 480px;
    pointer-events: none;
    opacity: 0.04;
    background-image: repeating-linear-gradient(
        to right,
        currentColor 0 4.5rem,
        transparent 4.5rem 9.5rem
    );
    transform: skewX(-15deg);
    mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 70%, transparent);
}
.o_slash_field--right { right: -6%; }
.o_slash_field--left { left: -10%; }

/* ---------- Nagłówek strony ------------------------------------------ */

.o_header {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.15rem var(--gut);
    transition: background-color 0.3s ease, padding 0.3s ease, backdrop-filter 0.3s ease;
}
.o_header::after {
    content: "";
    position: absolute;
    inset-inline: 0;
    bottom: 0;
    height: 1px;
    background: var(--rule-dark);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.o_header.is-stuck {
    background: rgba(24, 23, 22, 0.92);
    backdrop-filter: saturate(140%) blur(10px);
    padding-block: 0.7rem;
}
.o_header.is-stuck::after { opacity: 1; }

.o_logo img { height: clamp(1.6rem, 2.4vw, 2.05rem); width: auto; }

.o_nav {
    margin-inline-start: auto;
    display: flex;
    align-items: center;
    gap: clamp(1.25rem, 2.6vw, 2.75rem);
}

.o_nav > a {
    position: relative;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--concrete-200);
    padding-block: 0.35rem;
    transition: color 0.2s ease;
}
.o_nav > a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--red);
    transition: width 0.25s ease;
}
.o_nav > a:hover { color: #fff; }
.o_nav > a:hover::after,
.o_nav > a.is-active::after { width: 100%; }
.o_nav > a.is-active { color: #fff; }

.o_lang {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    padding-inline-start: clamp(1rem, 2vw, 1.75rem);
    border-inline-start: 1px solid var(--rule-dark);
}
.o_lang .o_lang_current {
    color: #fff;
    box-shadow: inset 0 -2px 0 var(--red);
    padding-bottom: 0.2rem;
}
.o_lang a {
    color: var(--concrete-300);
    padding-bottom: 0.2rem;
    transition: color 0.2s ease, box-shadow 0.2s ease;
}
.o_lang a:hover { color: #fff; box-shadow: inset 0 -2px 0 rgba(255, 255, 255, 0.5); }

.o_burger {
    display: none;
    margin-inline-start: auto;
    width: 2.75rem;
    height: 2.25rem;
    background: none;
    border: 1px solid var(--rule-dark);
    cursor: pointer;
    padding: 0;
    position: relative;
}
.o_burger span,
.o_burger span::before,
.o_burger span::after {
    content: "";
    position: absolute;
    left: 50%;
    width: 1.05rem;
    height: 2px;
    background: #fff;
    transform: translateX(-50%);
    transition: transform 0.25s ease, opacity 0.2s ease;
}
.o_burger span { top: 50%; margin-top: -1px; }
.o_burger span::before { top: -6px; left: 0; transform: none; }
.o_burger span::after { top: 6px; left: 0; transform: none; }
.o_burger.is-open span { background: transparent; }
.o_burger.is-open span::before { transform: translateY(6px) rotate(45deg); }
.o_burger.is-open span::after { transform: translateY(-6px) rotate(-45deg); }

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

.o_hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: flex-end;
    padding-block: 9rem 4rem;
    background: var(--ink) center / cover no-repeat;
    isolation: isolate;
}
.o_hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(to top, rgba(20, 19, 18, 0.94) 0%, rgba(20, 19, 18, 0.55) 45%, rgba(20, 19, 18, 0.35) 100%),
        linear-gradient(to right, rgba(20, 19, 18, 0.8) 0%, rgba(20, 19, 18, 0.1) 60%);
}

.o_hero_grid {
    display: grid;
    gap: clamp(1.75rem, 3vw, 3rem);
    width: 100%;
}

.o_kicker {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--concrete-300);
}
.o_kicker::before {
    content: "";
    width: clamp(1.75rem, 5vw, 3.5rem);
    height: 2px;
    background: var(--red);
}

.o_hero h1 {
    /* Dolna granica dobrana tak, by „INNOWACYJNIE” mieściło się w jednej
       linii na 360 px szerokości ekranu. */
    font-size: clamp(1.95rem, 9.4vw, 8.75rem);
    text-transform: uppercase;
    letter-spacing: -0.04em;
    color: #fff;
}
.o_hero h1 span { display: block; }
.o_hero h1 .o_h1_2 { color: var(--concrete-300); }

.o_hero_lead {
    max-width: 46ch;
    font-size: clamp(1.0625rem, 1rem + 0.45vw, 1.3125rem);
    font-weight: 400;
    line-height: 1.7;
    color: #edebe6;
    text-shadow: 0 1px 14px rgba(0, 0, 0, 0.45);
}

.o_cta_row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem 1.25rem;
    align-items: center;
}

.o_btn {
    --btn-bg: var(--red);
    --btn-fg: #fff;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--btn-bg);
    color: var(--btn-fg);
    padding: 1rem 1.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    border: 1px solid var(--btn-bg);
    transition: background-color 0.22s ease, border-color 0.22s ease, color 0.22s ease, transform 0.22s ease;
}
.o_btn:hover { background: var(--red-dark); border-color: var(--red-dark); transform: translateY(-2px); }
.o_btn svg { width: 0.85rem; height: 0.85rem; flex: none; }

.o_btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--concrete-100);
    border-color: rgba(255, 255, 255, 0.35);
}
.o_btn--ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: #fff;
    color: #fff;
}

.o_scroll_hint {
    position: absolute;
    right: var(--gut);
    bottom: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--concrete-300);
    writing-mode: vertical-rl;
}
.o_scroll_hint::after {
    content: "";
    width: 1px;
    height: 3.5rem;
    background: linear-gradient(to bottom, var(--red), transparent);
    animation: o_pulse 2.4s ease-in-out infinite;
}
@keyframes o_pulse {
    0%, 100% { opacity: 0.35; transform: scaleY(0.6); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* ---------- Nagłówki sekcji ------------------------------------------ */

.o_sec_head {
    display: flex;
    align-items: baseline;
    gap: 1.1rem;
    margin-bottom: clamp(2rem, 4vw, 3.5rem);
    padding-bottom: 1.1rem;
    border-bottom: 1px solid var(--rule);
}
.o_section--dark .o_sec_head { border-bottom-color: var(--rule-dark); }

.o_sec_num {
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--red);
}
.o_sec_label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.24em;
    text-transform: uppercase;
}

.o_headline {
    font-size: clamp(1.75rem, 1.1rem + 2.6vw, 3.5rem);
    max-width: 22ch;
}
.o_headline--wide { max-width: 30ch; }

.o_body {
    font-weight: 400;
    font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
    line-height: 1.7;
    max-width: 62ch;
    color: var(--text-on-light);
}
.o_section--dark .o_body { color: var(--text-on-dark); }

/* ---------- 01 Fundamenty -------------------------------------------- */

.o_found_bg {
    position: absolute;
    inset: 0;
    background: center / cover no-repeat;
    opacity: 0.09;
    filter: grayscale(1) contrast(1.1);
    mask-image: linear-gradient(to bottom, transparent, #000 35%, #000 65%, transparent);
    pointer-events: none;
}

.o_found_grid {
    position: relative;
    display: grid;
    gap: clamp(1.5rem, 3.5vw, 3.5rem);
    grid-template-columns: 1fr;
}
@media (min-width: 60rem) {
    .o_found_grid { grid-template-columns: 1.15fr 1fr; align-items: start; }
}

.o_pillars {
    display: grid;
    gap: 0;
    margin-top: clamp(2.5rem, 5vw, 4.5rem);
    grid-template-columns: 1fr;
    border-top: 1px solid var(--rule);
}
@media (min-width: 52rem) {
    .o_pillars { grid-template-columns: repeat(3, 1fr); }
    .o_pillars--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 72rem) {
    .o_pillars--4 { grid-template-columns: repeat(4, 1fr); }
}

.o_pillar {
    padding: clamp(1.5rem, 2.5vw, 2.25rem) 0;
    border-bottom: 1px solid var(--rule);
    position: relative;
}
@media (min-width: 52rem) {
    .o_pillar { padding-inline: clamp(1.25rem, 2.5vw, 2.25rem); border-bottom: none; }
    .o_pillar + .o_pillar { border-inline-start: 1px solid var(--rule); }
    .o_pillar:first-child { padding-inline-start: 0; }
    /* wariant 2×2: pierwszy element każdego rzędu bez lewej krawędzi */
    .o_pillars--4 .o_pillar:nth-child(odd) { border-inline-start: none; padding-inline-start: 0; }
    .o_pillars--4 .o_pillar { border-bottom: 1px solid var(--rule); }
}
@media (min-width: 72rem) {
    .o_pillars--4 .o_pillar { border-bottom: none; }
    .o_pillars--4 .o_pillar:nth-child(odd) { padding-inline-start: clamp(1.25rem, 2.5vw, 2.25rem); }
    .o_pillars--4 .o_pillar + .o_pillar { border-inline-start: 1px solid var(--rule); }
    .o_pillars--4 .o_pillar:nth-child(odd):not(:first-child) { border-inline-start: 1px solid var(--rule); }
    .o_pillars--4 .o_pillar:first-child { padding-inline-start: 0; border-inline-start: none; }
}
.o_pillar::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    width: 2.5rem;
    height: 3px;
    background: var(--red);
}
@media (min-width: 52rem) {
    .o_pillar:not(:first-child)::before { left: clamp(1.25rem, 2.5vw, 2.25rem); }
}

.o_pillar h3 {
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}
.o_pillar p {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-on-light);
}

/* ---------- 02 Produkt ------------------------------------------------ */

.o_product { background: var(--ink-2); }
.o_product_bg {
    position: absolute;
    inset: 0;
    background: center / cover no-repeat;
    opacity: 0.22;
    filter: grayscale(0.35) contrast(1.05);
    mask-image: linear-gradient(to left, #000 10%, transparent 78%);
    pointer-events: none;
}

.o_product_grid {
    position: relative;
    display: grid;
    gap: clamp(2rem, 4vw, 4rem);
}
@media (min-width: 62rem) {
    .o_product_grid { grid-template-columns: 1fr 1fr; align-items: start; }
}

.o_group_label {
    margin-top: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.1rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--concrete-300);
    display: flex;
    align-items: center;
    gap: 0.9rem;
}
.o_group_label::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule-dark);
}

.o_product_note {
    margin-top: clamp(1.75rem, 3vw, 2.5rem);
    padding: 1.1rem 1.35rem;
    border-inline-start: 3px solid var(--red);
    background: rgba(33, 31, 29, 0.75);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.65;
    color: #e6e3dd;
    max-width: 64ch;
}

.o_cards {
    display: grid;
    gap: 1px;
    background: var(--rule-dark);
    border: 1px solid var(--rule-dark);
    align-self: stretch;
}
@media (min-width: 32rem) {
    .o_cards { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 62rem) {
    .o_cards--3 { grid-template-columns: repeat(3, 1fr); }
}

.o_card {
    position: relative;
    background: rgba(33, 31, 29, 0.82);
    backdrop-filter: blur(6px);
    padding: clamp(1.6rem, 2.6vw, 2.25rem);
    min-height: clamp(9rem, 14vw, 12rem);
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    transition: background-color 0.25s ease;
}
.o_card:hover { background: rgba(44, 42, 39, 0.92); }
.o_card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 0;
    background: var(--red);
    transition: height 0.3s ease;
}
.o_card:hover::before { height: 100%; }
.o_card h3,
.o_card h4 {
    font-size: 1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.55rem;
}
.o_card p {
    font-size: 0.975rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-on-dark);
}

/* ---------- 03 Realizacje --------------------------------------------- */

.o_gallery {
    display: grid;
    gap: clamp(0.9rem, 1.6vw, 1.4rem);
    margin-top: clamp(2.25rem, 4.5vw, 3.75rem);
    grid-template-columns: 1fr;
}
@media (min-width: 40rem) { .o_gallery { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .o_gallery { grid-template-columns: repeat(3, 1fr); } }

.o_shot {
    margin: 0;
    position: relative;
    overflow: hidden;
    background: var(--concrete-200);
}
.o_shot img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.o_shot:hover img { transform: scale(1.035); }
.o_shot figcaption {
    position: absolute;
    inset-inline: 0;
    bottom: 0;
    padding: 2.25rem 1.1rem 0.95rem;
    background: linear-gradient(to top, rgba(20, 19, 18, 0.82), transparent);
    color: #f2f0ec;
    font-size: 0.82rem;
    font-weight: 500;
    line-height: 1.45;
    letter-spacing: 0.02em;
}

/* ---------- 04 Proces -------------------------------------------------- */

.o_process_grid {
    display: grid;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
}
@media (min-width: 62rem) {
    .o_process_grid { grid-template-columns: 1.25fr 1fr; }
}
.o_process_visual { position: relative; }
.o_process_visual::before {
    content: "";
    position: absolute;
    inset: 1.25rem -1.25rem -1.25rem 1.25rem;
    border: 1px solid var(--rule-dark);
    pointer-events: none;
}
.o_process_visual img { width: 100%; display: block; }
@media (max-width: 62rem) {
    .o_process_visual { display: none; }
}

.o_steps {
    list-style: none;
    margin: clamp(2rem, 3.5vw, 3rem) 0 clamp(1.75rem, 3vw, 2.5rem);
    padding: 0;
    display: grid;
    gap: 0;
}
.o_step {
    display: flex;
    gap: 1.25rem;
    padding-block: clamp(1.1rem, 2vw, 1.5rem);
    border-top: 1px solid var(--rule-dark);
}
.o_step:last-child { border-bottom: 1px solid var(--rule-dark); }
.o_step_num {
    flex: none;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--red);
    letter-spacing: 0.04em;
    line-height: 1.5;
}
.o_step h3 {
    font-size: 1.02rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.4rem;
}
.o_step p {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-on-dark);
}

/* ---------- 05 Zespół ------------------------------------------------- */

.o_team {
    display: grid;
    gap: 1px;
    margin-top: clamp(2.5rem, 5vw, 4rem);
    background: var(--rule);
    border-block: 1px solid var(--rule);
}
@media (min-width: 40rem) { .o_team { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .o_team { grid-template-columns: repeat(3, 1fr); } }

.o_member {
    display: flex;
    align-items: center;
    gap: 1.15rem;
    padding: clamp(1.1rem, 2vw, 1.6rem);
    background: var(--concrete-100);
    transition: background-color 0.25s ease;
}
.o_member:hover { background: var(--concrete-050); }

.o_mono {
    position: relative;
    flex: none;
    width: 3.5rem;
    height: 3.5rem;
    display: grid;
    place-items: center;
    background: var(--ink);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    overflow: hidden;
}
.o_mono::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
        to right,
        rgba(255, 255, 255, 0.14) 0 3px,
        transparent 3px 11px
    );
    transform: skewX(-15deg) scale(1.4);
    opacity: 0.65;
}
.o_member:hover .o_mono { background: var(--red); }

.o_member_name {
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.3;
}
.o_member_role {
    font-size: 0.82rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: #57534c;
}

.o_join {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem 2rem;
    margin-top: clamp(2rem, 4vw, 3.25rem);
    padding: clamp(1.5rem, 3vw, 2.25rem);
    background: var(--ink);
    color: #fff;
}
.o_join p {
    font-size: clamp(1.05rem, 0.95rem + 0.6vw, 1.5rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    max-width: 34ch;
}

/* ---------- 04 Kontakt ------------------------------------------------ */

.o_contact_grid {
    display: grid;
    gap: 1px;
    margin-top: clamp(2rem, 4vw, 3.5rem);
    background: var(--rule-dark);
    border-block: 1px solid var(--rule-dark);
}
@media (min-width: 44rem) { .o_contact_grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 68rem) { .o_contact_grid { grid-template-columns: repeat(4, 1fr); } }

.o_contact_item {
    background: var(--ink);
    padding: clamp(1.4rem, 2.5vw, 2rem) clamp(1.25rem, 2.5vw, 1.85rem);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.o_contact_item dt {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--concrete-500);
}
.o_contact_item dd {
    margin: 0;
    font-size: clamp(1rem, 0.95rem + 0.25vw, 1.15rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.45;
}
.o_contact_item a { transition: color 0.2s ease; }
.o_contact_item a:hover { color: var(--red); }
.o_link_small {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--concrete-500) !important;
}
.o_link_small:hover { color: var(--red) !important; }

/* ---------- Stopka ---------------------------------------------------- */

.o_footer {
    background: #121110;
    color: var(--text-on-dark);
    padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
    font-size: 0.9rem;
    font-weight: 400;
}
.o_footer_grid {
    display: grid;
    gap: clamp(2rem, 4vw, 3rem);
    padding-bottom: clamp(2rem, 4vw, 3rem);
    border-bottom: 1px solid var(--rule-dark);
}
@media (min-width: 48rem) {
    .o_footer_grid { grid-template-columns: 1.4fr 1fr 1fr; align-items: start; }
}
.o_footer img { height: 2rem; width: auto; margin-bottom: 1.25rem; }
.o_footer h4 {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--concrete-500);
    margin-bottom: 0.85rem;
}
.o_footer a:hover { color: #fff; }
.o_footer_bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    justify-content: space-between;
    padding-top: 1.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    color: var(--concrete-600);
}

/* ---------- Animacje ujawniania -------------------------------------- */

.o_reveal {
    opacity: 0;
    transform: translateY(1.5rem);
    transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
    transition-delay: calc(var(--i, 0) * 90ms);
}
.o_reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .o_reveal { opacity: 1; transform: none; transition: none; }
    .o_scroll_hint::after { animation: none; }
    .o_btn:hover { transform: none; }
}

/* ---------- Mobile ---------------------------------------------------- */

@media (max-width: 60rem) {
    .o_burger { display: block; }
    /* Logo i „hamburger” muszą pozostać nad rozwiniętym menu — inaczej nie
       da się go zamknąć. */
    .o_logo,
    .o_burger { position: relative; z-index: 2; }
    .o_nav {
        position: fixed;
        inset: 0 0 auto;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        margin: 0;
        padding: 5.5rem var(--gut) 2.5rem;
        background: rgba(19, 18, 17, 0.985);
        backdrop-filter: blur(8px);
        transform: translateY(-100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        height: 100svh;
        justify-content: center;
    }
    .o_nav.is-open { transform: none; }
    .o_nav > a {
        font-size: 1.5rem;
        letter-spacing: 0.02em;
        font-weight: 800;
        text-transform: uppercase;
        padding-block: 0.85rem;
        width: 100%;
        border-bottom: 1px solid var(--rule-dark);
    }
    .o_nav > a::after { display: none; }
    .o_lang {
        margin-top: 1.75rem;
        padding-inline-start: 0;
        border-inline-start: none;
        font-size: 0.85rem;
    }
    .o_scroll_hint { display: none; }
    .o_hero { padding-block: 7.5rem 3rem; }
}

/* ---------- Formularz kontaktowy -------------------------------------- */

.o_form {
    margin-top: clamp(2rem, 4vw, 3.5rem);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    background: var(--ink-2);
    border: 1px solid var(--rule-dark);
}
.o_form_heading {
    margin: 0 0 1.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--concrete-500);
}
.o_form_grid {
    display: grid;
    gap: 1.25rem;
}
@media (min-width: 44rem) {
    .o_form_grid { grid-template-columns: repeat(2, 1fr); }
    .o_field--full { grid-column: 1 / -1; }
}
.o_field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}
.o_field > span {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--concrete-500);
}
.o_field input,
.o_field select,
.o_field textarea {
    background: var(--ink);
    border: 1px solid var(--rule-dark);
    color: var(--concrete-100);
    font: inherit;
    padding: 0.85rem 1rem;
    border-radius: 0;
    width: 100%;
}
.o_field textarea { resize: vertical; min-height: 8rem; }
.o_field input:focus,
.o_field select:focus,
.o_field textarea:focus {
    outline: 2px solid var(--red);
    outline-offset: -1px;
}
.o_consent {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-on-dark);
    line-height: 1.55;
}
.o_consent input {
    margin-top: 0.25rem;
    width: 1.05rem;
    height: 1.05rem;
    accent-color: var(--red);
    flex: none;
}
.o_consent a { text-decoration: underline; }
.o_consent a:hover { color: var(--red); }
.o_form .o_cta_row {
    margin-top: 1.5rem;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.o_form_alt { font-size: 0.85rem; color: var(--concrete-500); }
.o_form_alt a { font-weight: 600; color: var(--concrete-100); }
.o_form_alt a:hover { color: var(--red); }
.o_btn[type="submit"] { cursor: pointer; font-family: inherit; }

/* Pole-miodówka: poza ekranem, niedostępne dla ludzi. */
.o_hp {
    position: absolute !important;
    left: -9999px !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ---------- Status formularza (:target, bez JS) ------------------------ */

.o_form_status {
    display: none;
    padding: clamp(3rem, 6vw, 5rem) 0;
    background: var(--ink-2);
    border-top: 1px solid var(--rule-dark);
    text-align: center;
}
.o_form_status:target { display: block; }
.o_form_status h2 { margin: 0 0 0.75rem; }
.o_form_status p {
    margin: 0 auto 1.75rem;
    max-width: 34rem;
    color: var(--text-on-dark);
}
.o_form_status--ok h2 { color: var(--concrete-050); }
.o_form_status--err h2 { color: var(--red); }

/* ---------- Podstrona prosta (polityka prywatności) -------------------- */

.o_page_simple .o_header { position: static; }
.o_header--solid { background: var(--ink); }
.o_nav--simple { display: flex; }
.o_wrap--narrow { max-width: 46rem; }
.o_privacy { padding-top: clamp(2.5rem, 5vw, 4rem); }
.o_privacy h1 {
    font-size: clamp(1.8rem, 1.4rem + 2vw, 2.6rem);
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
}
.o_privacy_updated {
    font-size: 0.8rem;
    color: var(--concrete-500);
    margin: 0 0 2.5rem;
}
.o_privacy h2 {
    font-size: 1.1rem;
    margin: 2.25rem 0 0.6rem;
    color: var(--concrete-050);
}
.o_privacy p { color: var(--text-on-dark); margin: 0; }
.o_privacy_back { margin-top: 3rem; }

.o_footer_link { color: inherit; }
.o_footer_link:hover { color: var(--red); }