/* =========================================================
   Pinakin Technologies & Research Center — Alt. Concept
   "Systems console": a light, technical dashboard aesthetic.
   Dark-navy UI chrome, amber as the single brand accent, a
   status-green pulse for availability, monospace data labels,
   and circuit-trace lines standing in for connectivity.
   ========================================================= */

:root {
    /* Color tokens — brighter pass: near-white ground, a more
       vivid amber pulled from the logo, and a legible warm-ink
       secondary text color instead of a low-contrast tan */
    --pkc-bg: #FDFBF7;
    --pkc-panel: #FFFFFF;
    --pkc-navy: #46280F;
    --pkc-navy-soft: #59340F;
    --pkc-ink: #241505;
    --pkc-ink-soft: #746145;
    --pkc-line: #EDE6D3;
    --pkc-amber: #F0930C;
    --pkc-amber-soft: #FFF1D6;
    --pkc-green: #22C55E;

    /* Type */
    --pkc-font-display: 'Manrope', 'Segoe UI', sans-serif;
    --pkc-font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --pkc-font-body: 'Inter', 'Segoe UI', sans-serif;

    /* Layout */
    --pkc-max: 1180px;
    --pkc-radius: 10px;
    --pkc-shadow: 0 24px 48px -28px rgba(16, 22, 42, 0.28);
    --pkc-header-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--pkc-font-body);
    color: var(--pkc-ink);
    background: var(--pkc-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 {
    font-family: var(--pkc-font-display);
    color: var(--pkc-ink);
    margin: 0 0 0.5em;
    line-height: 1.15;
    letter-spacing: -0.01em;
    font-weight: 700;
}
p { margin: 0 0 1em; line-height: 1.7; color: #5A4B36; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}
:focus-visible { outline: 2px solid var(--pkc-amber); outline-offset: 3px; }

.pkc-container { max-width: var(--pkc-max); margin: 0 auto; padding: 0 24px; }

/* ---------- Preloader ---------- */
#pkc-preloader {
    position: fixed; inset: 0; z-index: 999999;
    background: var(--pkc-bg);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}
#pkc-preloader.pkc-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.pkc-preloader-dot {
    width: 14px; height: 14px; border-radius: 3px;
    background: var(--pkc-amber);
    animation: pkc-pulse 1s ease-in-out infinite;
}
@keyframes pkc-pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(0.55); opacity: 0.5; } }

/* ---------- Buttons ---------- */
.pkc-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 13px 24px;
    border-radius: var(--pkc-radius);
    font-family: var(--pkc-font-mono);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.pkc-btn--solid {
    background: var(--pkc-amber);
    color: #201404;
    box-shadow: 0 14px 24px -12px rgba(240, 147, 12, 0.55);
}
.pkc-btn--solid:hover { transform: translateY(-2px); box-shadow: 0 18px 28px -12px rgba(240, 147, 12, 0.6); }
.pkc-btn--line {
    background: transparent;
    color: var(--pkc-ink);
    border-color: var(--pkc-line);
}
.pkc-btn--line:hover { border-color: var(--pkc-amber); color: var(--pkc-amber); }

/* ---------- Header ---------- */
.pkc-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 9000;
    height: var(--pkc-header-h);
    display: flex; align-items: center;
    background: rgba(59, 36, 16, 0.92);
    backdrop-filter: blur(10px);
    transition: height 0.3s ease;
}
.pkc-header.pkc-scrolled { height: 62px; box-shadow: 0 18px 30px -22px rgba(0,0,0,0.5); }
.pkc-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.pkc-brand { display: inline-flex; align-items: center; }
.pkc-brand__mark {
            height: 120px;
            margin-top: 45px;
            width: auto;
            /* filter: brightness(0) invert(1); */
            opacity: 0.94;
            transition: height 0.3s ease;
        }
.pkc-header.pkc-scrolled .pkc-brand__mark { height: 65px; margin-top: 0; }

.pkc-nav__list { display: flex; align-items: center; gap: 2px; }
.pkc-nav__link {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 9px 14px;
    font-family: var(--pkc-font-mono);
    font-size: 0.85rem;
    color: #D8C9A8;
    border-radius: 6px;
    transition: color 0.2s ease, background 0.2s ease;
}
.pkc-nav__link span { font-size: 0.7rem; color: var(--pkc-amber); }
.pkc-nav__link:hover { color: #FFFFFF; }
.pkc-nav__link.active { color: #FFFFFF; background: rgba(255,255,255,0.08); }

.pkc-header__actions { display: flex; align-items: center; gap: 12px; }
.pkc-header__cta { color: #F3D89A; border-color: rgba(255,255,255,0.2); }
.pkc-header__cta:hover { color: var(--pkc-amber); border-color: var(--pkc-amber); }
.pkc-header__cta--active { color: var(--pkc-amber); border-color: var(--pkc-amber); background: rgba(240, 147, 12, 0.12); }

.pkc-nav-toggle {
    display: none; flex-direction: column; justify-content: center; gap: 5px;
    width: 38px; height: 38px; border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.2);
    background: transparent; cursor: pointer;
}
.pkc-nav-toggle span { display: block; height: 2px; width: 16px; margin: 0 auto; background: #fff; transition: transform 0.25s ease, opacity 0.25s ease; }
.pkc-nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.pkc-nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Eyebrow / titles ---------- */
.pkc-eyebrow {
    font-family: var(--pkc-font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    color: var(--pkc-amber);
    margin: 0 0 14px;
}
.pkc-section-title { max-width: 640px; margin: 0 0 48px; }
.pkc-section-title h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); }
.pkc-section { padding: 96px 0; }
.pkc-section--panel { background: var(--pkc-panel); border-top: 1px solid var(--pkc-line); border-bottom: 1px solid var(--pkc-line); }

/* ---------- Hero ---------- */
.pkc-hero { position: relative; padding: calc(var(--pkc-header-h) + 60px) 0 90px; overflow: hidden; }
.pkc-trace { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.pkc-trace path { fill: none; stroke: var(--pkc-line); stroke-width: 1.5; }
.pkc-trace circle { fill: var(--pkc-amber); opacity: 0.7; }
.pkc-hero__inner { display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: 48px; position: relative; z-index: 1; }
.pkc-hero__title { font-size: clamp(2.1rem, 4vw, 3.2rem); max-width: 14ch; }
.pkc-hero__lead { max-width: 46ch; font-size: 1.06rem; }
.pkc-hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 26px 0 22px; }
.pkc-status { display: inline-flex; align-items: center; gap: 10px; font-family: var(--pkc-font-mono); font-size: 0.85rem; color: var(--pkc-ink-soft); margin: 0; }
.pkc-status__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--pkc-green); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6); animation: pkc-dot 1.8s ease-out infinite; }
@keyframes pkc-dot { 0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); } 70% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); } 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); } }

.pkc-window {
    background: var(--pkc-navy);
    border-radius: var(--pkc-radius);
    box-shadow: var(--pkc-shadow);
    overflow: hidden;
}
.pkc-window__bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; background: var(--pkc-navy-soft); }
.pkc-window__bar span { width: 10px; height: 10px; border-radius: 50%; background: #45507A; }
.pkc-window__bar span:nth-child(1) { background: #E0705C; }
.pkc-window__bar span:nth-child(2) { background: #E2A93D; }
.pkc-window__bar span:nth-child(3) { background: #4FB37B; }
.pkc-window__bar p { margin: 0 0 0 8px; font-family: var(--pkc-font-mono); font-size: 0.78rem; color: #B9A484; }
.pkc-window__body { padding: 26px 24px 30px; font-family: var(--pkc-font-mono); font-size: 0.88rem; }
.pkc-window__body p { margin: 0 0 4px; color: #E9DCC2; }
.pkc-window__prompt { color: var(--pkc-amber); margin-right: 8px; }
.pkc-window__out { color: #B9A484; margin-bottom: 18px !important; padding-left: 20px; }
.pkc-window__cursor { margin-top: 4px; }
.pkc-blink { display: inline-block; width: 8px; height: 15px; background: var(--pkc-amber); animation: pkc-blink 1s step-start infinite; vertical-align: -2px; }
@keyframes pkc-blink { 50% { opacity: 0; } }

/* ---------- Clients ---------- */
.pkc-clients { padding: 44px 0; border-top: 1px solid var(--pkc-line); border-bottom: 1px solid var(--pkc-line); background: var(--pkc-panel); }
.pkc-clients__label { text-align: center; font-family: var(--pkc-font-mono); font-size: 0.82rem; color: var(--pkc-ink-soft); margin-bottom: 26px; }
.pkc-clients__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 40px; }
.pkc-clients__logo img { height: 42px; width: auto; filter: grayscale(1) opacity(0.5); transition: filter 0.25s ease, transform 0.25s ease; }
.pkc-clients__logo:hover img { filter: grayscale(0) opacity(1); transform: translateY(-2px); }

/* ---------- About ---------- */
.pkc-about__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; }
.pkc-about__copy p:last-child { margin-bottom: 0; }
.pkc-spec-grid { display: grid; gap: 16px; }
.pkc-spec-card {
    background: var(--pkc-panel);
    border: 1px solid var(--pkc-line);
    border-left: 3px solid var(--pkc-amber);
    border-radius: var(--pkc-radius);
    padding: 24px 26px;
}
.pkc-spec-card__tag { font-family: var(--pkc-font-mono); font-size: 0.78rem; color: var(--pkc-amber); margin-bottom: 10px; }
.pkc-spec-card p:last-child { margin: 0; font-size: 0.95rem; }

/* ---------- Services ---------- */
.pkc-services__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--pkc-line); border: 1px solid var(--pkc-line); border-radius: var(--pkc-radius); overflow: hidden; }
.pkc-service-card {
    background: var(--pkc-panel);
    padding: 30px 22px;
    text-align: left;
    transition: background 0.2s ease;
    position: relative;
}
.pkc-service-card:hover { background: var(--pkc-amber-soft); }
.pkc-service-card__tag { font-family: var(--pkc-font-mono); font-size: 0.72rem; color: var(--pkc-ink-soft); margin-bottom: 20px; }
.pkc-service-card__icon { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: 8px; background: var(--pkc-bg); margin-bottom: 16px; }
.pkc-service-card__icon img { height: 50px; width: 50px; object-fit: contain; }
.pkc-service-card h3 { font-size: 1rem; margin: 0; }

/* ---------- Portfolio ---------- */
.pkc-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; font-family: var(--pkc-font-mono); }
.pkc-filters li {
    padding: 9px 16px; border-radius: 6px; border: 1px solid var(--pkc-line);
    font-size: 0.83rem; cursor: pointer; background: var(--pkc-panel);
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.pkc-filters li:hover { border-color: var(--pkc-amber); color: var(--pkc-amber); }
.pkc-filters li.filter-active { background: var(--pkc-navy); color: #fff; border-color: var(--pkc-navy); }

.pkc-portfolio__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pkc-portfolio__item {
    background: var(--pkc-panel);
    border: 1px solid var(--pkc-line);
    border-radius: var(--pkc-radius);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.pkc-portfolio__item:hover { transform: translateY(-6px); box-shadow: var(--pkc-shadow); }
.pkc-portfolio__bar { display: flex; align-items: center; gap: 6px; padding: 10px 12px; background: var(--pkc-navy); }
.pkc-portfolio__bar span { width: 7px; height: 7px; border-radius: 50%; background: #45507A; }
.pkc-portfolio__bar span:nth-child(1) { background: #E0705C; }
.pkc-portfolio__bar span:nth-child(2) { background: #E2A93D; }
.pkc-portfolio__bar span:nth-child(3) { background: #4FB37B; }
.pkc-portfolio__bar p { margin: 0 0 0 8px; font-family: var(--pkc-font-mono); font-size: 0.7rem; color: #B9A484; }
.pkc-portfolio__img { position: relative; height: 180px; background: var(--pkc-bg); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.pkc-portfolio__img img { max-height: 80%; width: auto; object-fit: contain; }
.pkc-portfolio__link {
    position: absolute; right: 12px; bottom: 12px; width: 36px; height: 36px; border-radius: 50%;
    background: var(--pkc-navy); color: #fff; display: flex; align-items: center; justify-content: center;
    opacity: 0; transform: translateY(8px); transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.pkc-portfolio__item:hover .pkc-portfolio__link { opacity: 1; transform: translateY(0); }
.pkc-portfolio__link:hover { background: var(--pkc-amber); color: #201404; }
.pkc-portfolio__info { padding: 16px 18px 20px; }
.pkc-portfolio__info h4 { font-size: 1rem; margin-bottom: 4px; }
.pkc-portfolio__info p { margin: 0; font-size: 0.85rem; color: var(--pkc-ink-soft); }
.pkc-portfolio__item.pkc-hide { display: none; }

/* ---------- Team ---------- */
.pkc-team__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.pkc-team-card {
    display: flex; gap: 14px; align-items: flex-start;
    background: var(--pkc-panel); border: 1px solid var(--pkc-line); border-radius: var(--pkc-radius);
    padding: 18px; transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.pkc-team-card:hover { box-shadow: var(--pkc-shadow); transform: translateY(-4px); }
.pkc-team-card__pic { position: relative; width: 64px; height: 64px; flex-shrink: 0; border-radius: 10px; overflow: hidden; background: var(--pkc-bg); }
.pkc-team-card__pic img { width: 100%; height: 100%; object-fit: cover; }
.pkc-team-card__badge {
    position: absolute; bottom: -4px; right: -4px;
    font-family: var(--pkc-font-mono); font-size: 0.56rem; line-height: 1;
    background: var(--pkc-navy); color: var(--pkc-amber);
    padding: 3px 5px; border-radius: 4px;
    border: 2px solid var(--pkc-panel);
}
.pkc-team-card__info { padding: 2px 0 0; min-width: 0; }
.pkc-team-card__info h4 { font-size: 0.95rem; margin-bottom: 2px; }
.pkc-team-card__info > span { display: block; font-family: var(--pkc-font-mono); font-size: 0.72rem; color: var(--pkc-ink-soft); margin-bottom: 10px; }
.pkc-team-card__social { display: flex; gap: 6px; }
.pkc-team-card__social a { width: 26px; height: 26px; border-radius: 50%; background: var(--pkc-bg); display: flex; align-items: center; justify-content: center; font-size: 0.8rem; transition: background 0.2s ease, color 0.2s ease; }
.pkc-team-card__social a:hover { background: var(--pkc-amber); color: #201404; }

/* ---------- Careers page ---------- */
.pkc-careers { position: relative; padding-top: calc(var(--pkc-header-h) + 64px); overflow: hidden; min-height: 70vh; }
.pkc-careers__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.pkc-careers__window { width: 100%; }
.pkc-careers__note-title { font-family: var(--pkc-font-display); font-size: 1.15rem; font-weight: 700; color: var(--pkc-ink); margin-bottom: 12px; }
.pkc-careers__note .pkc-btn { margin-top: 6px; }

/* ---------- Contact ---------- */
.pkc-contact { background: var(--pkc-navy-soft); }
.pkc-contact .pkc-eyebrow { color: var(--pkc-amber); }
.pkc-contact .pkc-section-title h2 { color: #fff; }
.pkc-contact__grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 32px; }
.pkc-contact__info { display: flex; flex-direction: column; gap: 16px; }
.pkc-contact__line { display: flex; align-items: flex-start; gap: 12px; font-family: var(--pkc-font-mono); font-size: 0.9rem; color: #B9A484; margin: 0; }
.pkc-contact__icon {
    flex-shrink: 0;
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 8px;
    background: rgba(240, 147, 12, 0.14);
    color: var(--pkc-amber);
    font-size: 1.05rem;
}
.pkc-contact__text { padding-top: 6px; }
.pkc-contact__text em { display: block; font-style: normal; color: #F3E9D3; margin-top: 4px; font-size: 1rem; }
.pkc-contact__map { border-radius: var(--pkc-radius); overflow: hidden; margin-top: 8px; border: 1px solid rgba(255,255,255,0.1); }
.pkc-contact__map iframe { width: 100%; height: 190px; border: 0; display: block; filter: grayscale(0.3); }

.pkc-form { background: var(--pkc-panel); border-radius: var(--pkc-radius); padding: 30px; }
.pkc-form__label-top { font-family: var(--pkc-font-mono); font-size: 0.85rem; color: var(--pkc-ink-soft); margin-bottom: 18px; }
.pkc-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pkc-form__group { margin-bottom: 16px; }
.pkc-form__group label { display: block; font-family: var(--pkc-font-mono); font-size: 0.78rem; color: var(--pkc-ink-soft); margin-bottom: 8px; }
.pkc-form__control {
    width: 100%; padding: 12px 14px; border-radius: 6px; border: 1px solid var(--pkc-line);
    background: var(--pkc-bg); font-family: var(--pkc-font-body); font-size: 0.95rem; color: var(--pkc-ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.pkc-form__control:focus { outline: none; border-color: var(--pkc-amber); box-shadow: 0 0 0 3px rgba(240, 147, 12, 0.15); }
textarea.pkc-form__control { resize: vertical; min-height: 110px; }
.pkc-form__control.pkc-invalid { border-color: #C0432B; }
.validate { font-size: 0.8rem; color: #C0432B; margin-top: 4px; display: none; font-family: var(--pkc-font-mono); }
.pkc-form__status .loading, .pkc-form__status .error-message, .pkc-form__status .sent-message {
    display: none; font-family: var(--pkc-font-mono); font-size: 0.85rem; padding: 10px 14px; border-radius: 6px; margin-bottom: 8px;
}
.pkc-form__status .error-message { background: #FBE7E2; color: #A3341E; }
.pkc-form__status .sent-message { background: #E4F5EA; color: #1F7A45; }
.pkc-form__submit .pkc-btn { width: 100%; justify-content: center; }
@media (min-width: 640px) { .pkc-form__submit .pkc-btn { width: auto; } }

/* ---------- Footer ---------- */
.pkc-footer { background: var(--pkc-navy); color: #B9A484; }
.pkc-footer h4 { color: #fff; font-family: var(--pkc-font-mono); font-size: 0.85rem; font-weight: 500; text-transform: lowercase; }
.pkc-footer a { color: #B9A484; }
.pkc-footer a:hover { color: var(--pkc-amber); }
.pkc-footer__newsletter { border-bottom: 1px solid rgba(255,255,255,0.08); padding: 40px 0; }
.pkc-footer__newsletter-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.pkc-footer__newsletter-inner h4 { font-family: var(--pkc-font-display); text-transform: none; font-size: 1.1rem; margin: 4px 0 0; }
.pkc-newsletter-form { display: flex; gap: 10px; flex-wrap: wrap; }
.pkc-newsletter-form input { padding: 12px 16px; border-radius: 6px; border: 1px solid rgba(255,255,255,0.15); background: rgba(255,255,255,0.06); color: #fff; min-width: 240px; font-family: var(--pkc-font-mono); font-size: 0.85rem; }
.pkc-newsletter-form input::placeholder { color: #8A7A5F; }
.pkc-newsletter-form button { padding: 12px 20px; border-radius: 6px; border: none; background: var(--pkc-amber); color: #201404; font-family: var(--pkc-font-mono); font-weight: 600; cursor: pointer; transition: transform 0.2s ease; }
.pkc-newsletter-form button:hover { transform: translateY(-2px); }
.pkc-footer__top { padding: 50px 0 30px; }
.pkc-footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 32px; }
.pkc-footer__brandname { font-family: var(--pkc-font-display); font-size: 1.3rem; color: #fff; margin-bottom: 12px; }
.pkc-footer__meta { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.pkc-footer__meta li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.92rem; color: #B9A484; }
.pkc-footer__meta i { flex-shrink: 0; color: var(--pkc-amber); font-size: 1rem; margin-top: 2px; }
.pkc-footer__links ul { display: grid; gap: 10px; margin-top: 16px; }
.pkc-footer__links li { font-size: 0.9rem; }
.pkc-footer__social-links { display: flex; gap: 10px; margin-top: 16px; }
.pkc-footer__social-links a { width: 32px; height: 32px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; transition: background 0.2s ease; }
.pkc-footer__social-links a:hover { background: var(--pkc-amber); color: #201404; }
.pkc-footer__bottom { padding: 20px 0 26px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.82rem; font-family: var(--pkc-font-mono); }

/* ---------- Back to top ---------- */
.pkc-back-to-top {
    position: fixed; right: 22px; bottom: 22px; width: 42px; height: 42px; border-radius: 8px;
    border: none; background: var(--pkc-ink); color: #fff; font-size: 1.15rem;
    display: flex; align-items: center; justify-content: center; cursor: pointer;
    box-shadow: var(--pkc-shadow); opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background 0.2s ease;
    z-index: 8000;
}
.pkc-back-to-top.pkc-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.pkc-back-to-top:hover { background: var(--pkc-amber); color: #201404; }

/* ---------- Scroll reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-reveal].pkc-in-view { opacity: 1; transform: translateY(0); }
[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1080px) {
    .pkc-services__grid { grid-template-columns: repeat(2, 1fr); }
    .pkc-portfolio__grid { grid-template-columns: repeat(2, 1fr); }
    .pkc-team__grid { grid-template-columns: repeat(2, 1fr); }
    .pkc-footer__grid { grid-template-columns: 1.2fr 1fr 1fr; }
    .pkc-footer__social { grid-column: span 2; }
}
@media (max-width: 900px) {
    .pkc-hero__inner { grid-template-columns: 1fr; }
    .pkc-about__grid { grid-template-columns: 1fr; }
    .pkc-contact__grid { grid-template-columns: 1fr; }
    .pkc-careers__grid { grid-template-columns: 1fr; }
}
@media (max-width: 840px) {
    .pkc-nav {
        position: fixed; top: var(--pkc-header-h); left: 0; right: 0;
        background: var(--pkc-navy);
        max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
    }
    .pkc-nav.pkc-open { max-height: 400px; }
    .pkc-nav__list { flex-direction: column; align-items: stretch; padding: 12px 24px 20px; gap: 4px; }
    .pkc-nav__link { padding: 12px 16px; }
    .pkc-nav-toggle { display: flex; }
    .pkc-header__cta { display: none; }
}
@media (max-width: 640px) {
    .pkc-section { padding: 60px 0; }
    .pkc-services__grid { grid-template-columns: 1fr; }
    .pkc-portfolio__grid { grid-template-columns: 1fr; }
    .pkc-team__grid { grid-template-columns: 1fr; }
    .pkc-form__row { grid-template-columns: 1fr; }
    .pkc-footer__grid { grid-template-columns: 1fr; }
    .pkc-footer__social { grid-column: auto; }
}