/* ===========================
   ELKOV – Hlavní stylesheet
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Inter:wght@300;400;500&display=swap');

/* ── Proměnné ── */
:root {
    --color-bg:         #0c0c0c;
    --color-bg-card:    #161616;
    --color-bg-darker:  #101010;
    --color-red:        #c0392b;
    --color-red-hover:  #e74c3c;
    --color-blue:       #2471a3;
    --color-blue-hover: #2980b9;
    --color-text:       #e0e0e0;
    --color-text-muted: #888;
    --color-border:     #222;
    --color-white:      #ffffff;

    --font-heading: 'Oswald', sans-serif;
    --font-body:    'Inter', sans-serif;

    --nav-h:        70px;
    --radius:       4px;
    --transition:   0.25s ease;
    --container:    1200px;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a   { text-decoration: none; color: inherit; }

/* ── Utility ── */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
}

.section {
    padding: 6rem 0;
}

.section-dark   { background: var(--color-bg); }
.section-darker { background: var(--color-bg-darker); }

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3.5rem;
}

.section-label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-red);
    margin-bottom: 0.6rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* ── Tlačítka ── */
.btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-primary {
    background: var(--color-red);
    color: var(--color-white);
    border: 2px solid var(--color-red);
}

.btn-primary:hover {
    background: var(--color-red-hover);
    border-color: var(--color-red-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255,255,255,0.35);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.7);
    transform: translateY(-2px);
}

/* ══════════════════════════
   NAVIGACE
══════════════════════════ */
.nav-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(10, 10, 10, 0.92);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background var(--transition), border-color var(--transition);
}

.nav-header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    border-bottom-color: var(--color-red);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-red);
    letter-spacing: 0.05em;
}

.nav-logo span { color: var(--color-white); }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    padding: 0.5rem 0.9rem;
    border-radius: var(--radius);
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
    color: var(--color-white);
    background: rgba(255,255,255,0.06);
}

.nav-cta {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-white);
    background: var(--color-red);
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius);
    margin-left: 0.5rem;
    transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
    background: var(--color-red-hover);
    transform: translateY(-1px);
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════
   HERO
══════════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-h);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.04);
    transition: transform 8s ease;
}

.hero-bg.loaded { transform: scale(1); }

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(0,0,0,0.82) 0%,
        rgba(0,0,0,0.55) 60%,
        rgba(192,57,43,0.12) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
    padding-bottom: 4rem;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: 0.78rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-red);
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.hero-tagline::before {
    content: '';
    display: inline-block;
    width: 30px;
    height: 2px;
    background: var(--color-red);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.hero-title span { color: var(--color-red); }

.hero-sub {
    max-width: 520px;
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: rgba(255,255,255,0.7);
    margin-bottom: 2.5rem;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    opacity: 0.5;
    transition: opacity var(--transition);
    animation: bounce 2.4s infinite;
}

.hero-scroll:hover { opacity: 1; }

.hero-scroll-arrow {
    display: block;
    width: 14px;
    height: 14px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(6px); }
}

/* ══════════════════════════
   O NÁS
══════════════════════════ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3.5rem;
    align-items: center;
}

.about-text .section-title { text-align: left; }

.about-desc {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.75;
    margin-bottom: 1.2rem;
}

.about-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

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

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-red);
    line-height: 1;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: 0.3rem;
}

.about-image {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    border-radius: var(--radius);
    display: block;
}

.about-image-accent {
    position: absolute;
    bottom: -8px;
    right: -8px;
    width: 60%;
    height: 60%;
    border-bottom: 3px solid var(--color-red);
    border-right: 3px solid var(--color-red);
    border-radius: 0 0 var(--radius) 0;
    pointer-events: none;
}

/* ══════════════════════════
   SLUŽBY
══════════════════════════ */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.service-card:hover {
    border-color: var(--color-red);
    transform: translateY(-3px);
    background: #1c1c1c;
}

.service-icon {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    margin-bottom: 1.25rem;
}

.service-icon--red  { background: var(--color-red); }
.service-icon--blue { background: var(--color-blue); }

.service-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: 0.03em;
    margin-bottom: 0.65rem;
    text-transform: uppercase;
}

.service-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ══════════════════════════
   GALERIE
══════════════════════════ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    cursor: pointer;
    aspect-ratio: 4/3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    display: block;
}

.gallery-item:hover img { transform: scale(1.06); }

/* Vodorovně převrácené fotky */
.gallery-item--flip img { transform: scaleX(-1); }
.gallery-item--flip:hover img { transform: scaleX(-1) scale(1.06); }
.lightbox-img-wrap img.is-flipped { transform: scaleX(-1); }

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(192,57,43,0.0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.gallery-overlay span {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: white;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    background: rgba(192,57,43,0.5);
}

.gallery-item:hover .gallery-overlay span {
    opacity: 1;
    transform: translateY(0);
}

/* ══════════════════════════
   KONTAKT
══════════════════════════ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.contact-item {
    display: flex;
    gap: 1.1rem;
    align-items: flex-start;
}

.contact-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.3rem;
}

.contact-dot--red  { background: var(--color-red); }
.contact-dot--blue { background: var(--color-blue); }

.contact-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.3rem;
}

.contact-value {
    font-size: 1.05rem;
    color: var(--color-white);
    font-weight: 400;
    line-height: 1.6;
    transition: color var(--transition);
}

a.contact-value:hover { color: var(--color-red); }

.contact-map {
    min-height: 340px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
}

.contact-map iframe {
    display: block;
    width: 100%;
    height: 340px;
    filter: grayscale(100%) invert(92%) hue-rotate(180deg) brightness(0.85) contrast(1.1);
}

/* ══════════════════════════
   FOOTER
══════════════════════════ */
.footer {
    background: #080808;
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-red);
    letter-spacing: 0.08em;
}

.footer-logo span { color: var(--color-white); }

.footer-copy {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: color var(--transition);
}

.footer-links a:hover { color: var(--color-red); }

/* ══════════════════════════
   LIGHTBOX
══════════════════════════ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: rgba(0,0,0,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.lightbox.active {
    opacity: 1;
    pointer-events: all;
}

.lightbox-img-wrap {
    max-width: 90vw;
    max-height: 88vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-img-wrap img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: 0 0 60px rgba(0,0,0,0.8);
    display: block;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    color: white;
    cursor: pointer;
    border-radius: var(--radius);
    font-size: 1.5rem;
    line-height: 1;
    transition: background var(--transition);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--color-red);
    border-color: var(--color-red);
}

.lightbox-close {
    top: 1rem;
    right: 1rem;
    padding: 0.4rem 0.7rem;
    font-size: 1.6rem;
}

.lightbox-prev {
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.7rem 1rem;
}

.lightbox-next {
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.7rem 1rem;
}

.lightbox-counter {
    position: absolute;
    bottom: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-heading);
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.45);
}

/* ══════════════════════════
   RESPONSIVE – tablet 768px
══════════════════════════ */
@media (min-width: 768px) {

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

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

    .about-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* ══════════════════════════
   RESPONSIVE – desktop 1024px
══════════════════════════ */
@media (min-width: 1024px) {

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

    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .about-image img {
        height: 460px;
    }

    .contact-map { min-height: 420px; }
    .contact-map iframe { height: 420px; }
}

/* ══════════════════════════
   RESPONSIVE – mobile nav
══════════════════════════ */
@media (max-width: 767px) {

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        background: rgba(10,10,10,0.98);
        flex-direction: column;
        padding: 1.5rem 1.25rem 2rem;
        border-bottom: 2px solid var(--color-red);
        gap: 0.25rem;
        backdrop-filter: blur(12px);
    }

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

    .nav-link, .nav-cta {
        width: 100%;
        text-align: left;
        padding: 0.75rem 1rem;
        margin: 0;
        font-size: 0.95rem;
    }

    .nav-cta {
        margin-top: 0.5rem;
        text-align: center;
    }

    .hero-title { font-size: clamp(2.2rem, 10vw, 3.5rem); }

    .gallery-grid { gap: 0.35rem; }

    .lightbox-prev { left: 0.3rem; }
    .lightbox-next { right: 0.3rem; }
}