:root {
    --kf-red: #E30613;
    --kf-red-dark: #b8050f;
    --kf-dark: #222222;
    --kf-gray: #666666;
    --kf-light: #f4f5f7;
    --kf-border: #e0e0e0;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { font-family: 'Plus Jakarta Sans', sans-serif; color: var(--kf-dark); background-color: var(--white); line-height: 1.6; overflow-x: hidden; }

header.kf-header {
    position: fixed; top: 0; left: 0; width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--kf-border);
}
.nav-container { max-width: 1200px; margin: 0 auto; padding: 15px 30px; display: flex; justify-content: space-between; align-items: center; }
.logo img { height: 35px; width: auto; display: block; }
.logo-fallback { font-weight: 700; font-size: 1.2rem; color: var(--kf-dark); text-decoration: none; }
.logo-fallback span { color: var(--kf-red); }
.nav-links { display: flex; gap: 18px; list-style: none; align-items: center; flex-wrap: wrap; justify-content: flex-end; row-gap: 8px; }
.nav-links li { white-space: nowrap; }
.nav-links a { text-decoration: none; color: var(--kf-gray); font-weight: 500; font-size: 0.9rem; transition: var(--transition); white-space: nowrap; }
.nav-links a:hover { color: var(--kf-red); }
.btn-eshop { background: var(--kf-red); color: var(--white) !important; padding: 10px 20px; border-radius: 4px; font-weight: 600; }
.btn-eshop:hover { background: var(--kf-red-dark); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--kf-dark); cursor: pointer; }

.kf-main { padding-top: 74px; }

.hero { padding: 100px 20px 100px; max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; border: none; }
.hero-content h1 { font-size: 3rem; font-weight: 700; letter-spacing: -1px; margin-bottom: 20px; line-height: 1.2; }
.hero-content h1 span { color: var(--kf-red); }
.hero-content p { font-size: 1.1rem; color: var(--kf-gray); margin-bottom: 20px; }
.hero-image { width: 100%; border-radius: 8px; overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.hero-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-buttons { display: flex; gap: 15px; flex-wrap: wrap; margin-top: 20px; }

.btn { display: inline-block; padding: 14px 28px; border-radius: 4px; font-weight: 600; text-decoration: none; transition: var(--transition); cursor: pointer; border: none; font-size: 1rem; }
.btn-primary { background: var(--kf-red); color: var(--white); }
.btn-primary:hover { background: var(--kf-red-dark); }
.btn-outline { border: 2px solid var(--kf-dark); color: var(--kf-dark); background: transparent; }
.btn-outline:hover { border-color: var(--kf-red); color: var(--kf-red); }

section.kf-section { padding: 80px 20px; max-width: 1200px; margin: 0 auto; border-top: 1px solid var(--kf-border); }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 15px; letter-spacing: -0.5px; }
.section-desc { color: var(--kf-gray); margin-bottom: 50px; max-width: 700px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }

.card { background: var(--kf-light); padding: 40px; border-radius: 6px; transition: var(--transition); border-left: 4px solid transparent; }
.card:hover { border-left-color: var(--kf-red); transform: translateY(-3px); }
.card h3 { font-size: 1.25rem; margin-bottom: 15px; }
.card p { color: var(--kf-gray); font-size: 0.95rem; }
.card i.card-icon { color: var(--kf-red); margin-bottom: 20px; display: block; }
.card ul { list-style: none; display: flex; flex-direction: column; gap: 15px; color: var(--kf-gray); }
.card ul i { color: var(--kf-red); margin-right: 10px; }

/* Produkty - taby */
.product-tabs-header { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 15px; margin-bottom: 25px; }
.kf-tab-btn { background: #fff; border: 1px solid var(--kf-border); border-radius: 8px; padding: 20px; cursor: pointer; display: flex; align-items: center; gap: 15px; transition: all 0.2s; }
.kf-tab-icon { width: 48px; height: 48px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.kf-tab-icon img { width: 100%; height: 100%; object-fit: contain; }
.kf-tab-btn.active, .kf-tab-btn:hover { border-color: var(--kf-red); }
.kf-tab-btn h3 { color: var(--kf-dark); font-size: 0.95rem; font-weight: 700; margin: 0; }
.product-tabs-content { background: #fff; border: 1px solid var(--kf-border); border-radius: 8px; padding: 30px; box-shadow: 0 4px 6px rgba(0,0,0,0.02); }
.kf-tab-pane { display: none; }
.kf-tab-pane.active { display: block; }
.kf-tab-pane h3 { color: var(--kf-dark); font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; border-bottom: 2px solid #f0f0f0; padding-bottom: 10px; }
.kf-tab-pane-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.kf-tab-link { display: flex; align-items: center; gap: 10px; padding: 12px 15px; background: #f9f9f9; border: 1px solid #eee; border-radius: 6px; color: var(--kf-dark); text-decoration: none; font-size: 0.95rem; }
.kf-tab-link i { font-size: 0.8rem; color: var(--kf-red); }

/* 3D Laser */
.kf-feature-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-bottom: 40px; }
.service-card { background: #fff; border: 1px solid var(--kf-border); border-radius: 8px; padding: 30px; box-shadow: 0 4px 6px rgba(0,0,0,0.02); }
.service-card > i { color: var(--kf-red); font-size: 2rem; margin-bottom: 20px; display: block; }
.service-card h3 { color: var(--kf-dark); font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.service-card p { color: #666; font-size: 0.95rem; line-height: 1.6; margin-bottom: 15px; }
.service-card ul { list-style: none; padding: 0; margin: 0; font-size: 0.9rem; color: #555; display: flex; flex-direction: column; gap: 8px; }
.service-card ul i { color: var(--kf-red); margin-right: 8px; }
.kf-cta-box { background: #fff; border: 2px solid var(--kf-red); border-radius: 8px; padding: 30px; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
.kf-cta-box h3 { color: var(--kf-dark); font-size: 1.35rem; margin-bottom: 10px; }
.kf-cta-box p { color: #666; margin-bottom: 20px; font-size: 1rem; }
.kf-cta-actions { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; align-items: center; }
.btn-secondary { text-decoration: none; padding: 12px 24px; border: 1px solid #ccc; border-radius: 4px; color: #333; font-weight: 600; display: inline-flex; align-items: center; gap: 8px; background: #fff; }
.btn-secondary i { color: var(--kf-red); }

/* Kariéra */
.career-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 25px; }
.career-item { background: #fff; border: 1px solid var(--kf-border); border-radius: 10px; overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.02); display: flex; flex-direction: column; }
.career-icon-box { background: #f1f3f5; height: 130px; display: flex; align-items: center; justify-content: center; position: relative; border-bottom: 1px solid var(--kf-border); }
.career-icon-box i { font-size: 2.2rem; color: var(--kf-red); }
.career-location-badge { position: absolute; top: 12px; right: 12px; background: #fff; padding: 4px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; color: var(--kf-dark); border: 1px solid #ddd; }
.career-location-badge i { color: var(--kf-red); margin-right: 4px; font-size: inherit; }
.career-body { padding: 25px; flex-grow: 1; display: flex; flex-direction: column; justify-content: space-between; }
.career-body h3 { color: var(--kf-dark); font-size: 1.2rem; font-weight: 700; margin: 0 0 8px 0; }
.career-body > div > p { color: #666; font-size: 0.92rem; line-height: 1.5; margin: 0 0 15px 0; }
.career-details { display: none; margin-bottom: 20px; padding-top: 15px; border-top: 1px dashed #eee; font-size: 0.9rem; color: #444; line-height: 1.6; }
.career-details strong { color: var(--kf-dark); display: block; margin-bottom: 5px; }
.career-details ul { margin: 0 0 10px 0; padding-left: 18px; }
.career-footer { border-top: 1px solid #f0f0f0; padding-top: 15px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.career-toggle-btn { background: none; border: none; color: var(--kf-dark); font-weight: 600; font-size: 0.9rem; cursor: pointer; padding: 0; display: flex; align-items: center; gap: 5px; }
.career-toggle-btn i { font-size: 0.75rem; transition: transform 0.2s; }
.career-apply-btn { background: var(--kf-red); color: #fff; padding: 8px 16px; border-radius: 6px; text-decoration: none; font-weight: 600; font-size: 0.9rem; }
.kf-empty-box { background: #fff; border: 1px solid var(--kf-border); border-radius: 8px; padding: 40px; text-align: center; color: #666; margin-top: 20px; }

/* Kontakty */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; }
.contact-card { background: var(--kf-light); padding: 30px; border-radius: 6px; border-top: 3px solid var(--kf-red); display: flex; flex-direction: column; justify-content: space-between; }
.contact-card h4 { margin-bottom: 15px; font-size: 1.1rem; }
.contact-card p { color: var(--kf-gray); font-size: 0.9rem; margin-bottom: 8px; }
.contact-card i { color: var(--kf-red); width: 20px; }
.contact-map { width: 100%; height: 160px; border-radius: 4px; overflow: hidden; border: 1px solid var(--kf-border); margin-top: 10px; }
.contact-map iframe { width: 100%; height: 100%; border: 0; }
.contact-map-link { padding: 6px 12px; font-size: 0.85rem; display: inline-block; margin-bottom: 10px; }

/* Richtext / obecná stránka */
.kf-richtext h2 { margin-bottom: 20px; }
.kf-richtext p { margin-bottom: 15px; color: var(--kf-dark); }
.kf-richtext ul, .kf-richtext ol { margin: 0 0 15px 25px; }
.kf-richtext .ql-align-center { text-align: center; }
.kf-richtext .ql-align-right { text-align: right; }
.kf-richtext .ql-align-justify { text-align: justify; }
.page-hero-title { max-width: 1200px; margin: 120px auto 0; padding: 0 20px; }
.page-hero-title h1 { font-size: 2.2rem; font-weight: 700; }

/* Cookie lišta */
.kf-cookie-banner {
    position: fixed; left: 16px; right: 16px; bottom: 16px;
    max-width: 900px; margin: 0 auto;
    background: #fff; border: 1px solid var(--kf-border); border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    padding: 18px 22px; z-index: 3000;
    display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
    /* Schováváme přes transform (posun mimo obrazovku) + viditelnost, ne pevný počet
       pixelů - díky tomu je lišta spolehlivě celá skrytá i když je na mobilu vyšší
       (více řádků textu), a ne jen z části posunutá pod okraj obrazovky. */
    transform: translateY(calc(100% + 30px));
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.35s ease, visibility 0s linear 0.35s;
}
.kf-cookie-banner.visible {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.35s ease, opacity 0.35s ease;
}
.kf-cookie-banner p { margin: 0; color: var(--kf-dark); font-size: 0.9rem; flex: 1 1 320px; }
.kf-cookie-banner p a { color: var(--kf-red); text-decoration: underline; }
.kf-cookie-actions { display: flex; gap: 10px; flex-wrap: wrap; flex-shrink: 0; }
.kf-cookie-actions .btn { padding: 10px 20px; font-size: 0.9rem; }
.kf-cookie-settings-btn {
    display: none; position: fixed; left: 16px; bottom: 16px; z-index: 2900;
    width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--kf-border);
    background: #fff; color: var(--kf-dark); align-items: center; justify-content: center;
    cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,0.15); font-size: 1.1rem;
}
.kf-cookie-settings-btn:hover { color: var(--kf-red); border-color: var(--kf-red); }

@media (max-width: 640px) {
    .kf-cookie-banner { left: 12px; right: 12px; bottom: 12px; padding: 16px; flex-direction: column; align-items: stretch; gap: 14px; }
    .kf-cookie-banner p { flex-basis: auto; font-size: 0.85rem; }
    .kf-cookie-actions { width: 100%; }
    .kf-cookie-actions .btn { flex: 1 1 0; text-align: center; padding: 12px 10px; }
    .kf-cookie-settings-btn { left: 12px; bottom: 12px; width: 40px; height: 40px; font-size: 1rem; }
}

/* Kalkulačka hmotnosti materiálu */
.kf-calc-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; margin-bottom: 25px; }
.kf-calc-field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--kf-dark); margin-bottom: 6px; }
.kf-calc-field input, .kf-calc-field select { width: 100%; padding: 10px 12px; border: 1px solid var(--kf-border); border-radius: 6px; font-size: 0.95rem; font-family: inherit; }
.kf-calc-field .unit { color: var(--kf-gray); font-size: 0.8rem; margin-top: 3px; }
.kf-calc-results { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 15px; background: var(--kf-light); border-radius: 8px; padding: 20px; }
.kf-calc-result-box { text-align: center; }
.kf-calc-result-box .label { font-size: 0.8rem; color: var(--kf-gray); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 6px; }
.kf-calc-result-box .value { font-size: 1.6rem; font-weight: 700; color: var(--kf-red); }
.kf-calc-result-box .value span.unit-suffix { font-size: 1rem; color: var(--kf-dark); font-weight: 600; margin-left: 4px; }
.kf-calc-note { font-size: 0.8rem; color: var(--kf-gray); margin-top: 15px; }

/* Footer */
footer.kf-footer { background-color: var(--kf-dark); color: #fff; padding: 60px 0 30px 0; font-size: 0.95rem; margin-top: 60px; }
.kf-footer .container { max-width: 1200px; margin: 0 auto; padding: 0 15px; }
.footer-columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 40px; margin-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 40px; }
.footer-columns h3 { color: #fff; font-size: 1.1rem; font-weight: 700; margin-bottom: 15px; }
.footer-columns p { color: #aaa; line-height: 1.6; margin-bottom: 8px; font-size: 0.9rem; }
.footer-columns p i { color: var(--kf-red); margin-right: 8px; }
.footer-columns ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-columns a { color: #aaa; text-decoration: none; transition: color 0.2s; }
.footer-columns a:hover { color: #fff; }
.footer-bottom { text-align: center; color: #777; font-size: 0.85rem; }

@media (max-width: 1150px) {
    .nav-links { gap: 12px; }
    .nav-links a { font-size: 0.83rem; }
    .btn-eshop { padding: 8px 14px; }
}

@media (max-width: 768px) {
    .nav-links { position: fixed; top: 66px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: flex-start; padding: 20px 30px; display: none; border-bottom: 1px solid var(--kf-border); gap: 15px; }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .hero { grid-template-columns: 1fr; padding-top: 40px; text-align: center; }
    .hero-content h1 { font-size: 2.1rem; }
    .hero-buttons { justify-content: center; }
    .grid-2 { grid-template-columns: 1fr; }
    .kf-cta-actions, .career-footer { flex-direction: column; }

    /* Na mobilu vždy jeden sloupec - u pevné minimální šířky sloupce (minmax)
       by na hodně úzkých telefonech mohlo dojít k vodorovnému přetečení stránky. */
    .grid-3, .kf-feature-cards, .career-list, .contact-grid,
    .kf-calc-fields, .kf-calc-results, .product-tabs-header, .kf-tab-pane-grid {
        grid-template-columns: 1fr;
    }

    .kf-section { padding: 50px 16px; }
    .section-title { font-size: 1.6rem; }
    .card, .service-card, .contact-card, .kf-cta-box { padding: 22px; }
    .product-tabs-content { padding: 18px; }
    .page-hero-title { margin-top: 90px; }
    .page-hero-title h1 { font-size: 1.6rem; }
}

@media (max-width: 420px) {
    .hero-content h1 { font-size: 1.8rem; }
    .footer-columns { grid-template-columns: 1fr; }
}