/* GLOBÁLNÍ PROMĚNNÉ */
:root {
    --bg-color: #002418;
    --text-color: #ffffff;
    --text-color-muted: #b5b5b5;
    --text-color-accent: #00d58d;
    --accent-color: #00d58e;
    --dark-accent-color: #002b1d;
    --negative-bg: #8BF0AE;
    --negative-text: #050505;
    --bg-gradient: radial-gradient(circle at 50% 50%, rgba(10, 10, 10, 0) 0%, rgba(5, 5, 5, 0.98) 95%);
    --font-headings: 'Poppins', sans-serif;
    --font-sans: 'Poppins', sans-serif;
    --transition-smooth: opacity 0.4s ease, color 0.4s ease, border-color 0.4s ease, background-color 0.4s ease;
    --border-color: rgba(128, 128, 128, 1);
    --card-bg: rgba(10, 10, 10, 0.4);
}

/* ÚPRAVA PROMĚNNÝCH PRO SVĚTLÝ REŽIM */
.light-mode {
    --bg-color: #ffffff;
    --text-color: #252525;
    --text-color-muted: #626262;
    --text-color-accent: #00d58d;
    --negative-bg: #002b1d;
    --negative-text: #ffffff;
    --bg-gradient: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 1) 95%);
    --border-color: rgba(245, 245, 245, 1);
    --card-bg: rgba(245, 245, 245, 0.6);
}

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
}

html { 
    background-color: var(--bg-color); 
    color: var(--text-color); 
    font-family: var(--font-sans); 
    overflow-x: hidden; 
    transition: background-color 0.4s, color 0.4s;
    overflow-anchor: none;
    scroll-behavior: smooth;
}

body { 
    position: relative; 
    min-height: 100vh; 
}

main {
    padding-bottom: 80px;
}

/* POZADÍ */
.bg-gradient { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    pointer-events: none; 
    z-index: 2; 
    background: var(--bg-gradient); 
    transition: background 0.4s;
}

#bg-canvas { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    pointer-events: none; 
    z-index: 3; 
}

/* STRUKTURA OBSAHU */
.container { 
    position: relative; 
    z-index: 10; 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 0 40px; 
}

/* NAVIGACE - fixní bez ořezu menu */
header { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    padding: 20px 0;
    z-index: 100;
}

/* Podklad zajišťující rozostření a fade efekt, který nezasahuje do menu */
.header-blur-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
    z-index: -1;
    pointer-events: none;
}

.nav-wrapper { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo { 
    font-family: var(--font-headings); 
    font-size: 1.1rem; 
    font-weight: 500; 
    letter-spacing: 0.4em; 
    text-transform: uppercase; 
    text-decoration: none; 
    color: var(--text-color); 
    transition: var(--transition-smooth);
}

.logo-img {
    height: 30px;
    width: auto;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 1;
    transition: opacity 0.4s ease;
}

/* Obal, který drží rozměry loga, aby se layout nerozbil */
.logo.hover-target {
    position: relative;
    display: inline-block;
    height: 30px;
    /* Doplňte přibližnou šířku vašeho loga, např. width: 120px; */
}

/* Výchozí tmavý režim: tmavé logo je vidět, světlé je skryté */
.logo-light {
    opacity: 1;
    pointer-events: none;
}

.logo-dark {
    opacity: 0;
}

/* Světlý režim: prohození průhlednosti */
.light-mode .logo-dark {
    opacity: 1;
    pointer-events: none;
}

.light-mode .logo-light {
    opacity: 0;
    pointer-events: none; /* Pokud je logo klikací jako odkaz, nastavte pointer-events: auto pouze pro aktivní */
}

.logo:hover {
    letter-spacing: 0.5em;
    opacity: 0.8;
}

.menu-dropdown {
    position: relative;
    display: inline-block;
}

.menu-btn {
    font-family: var(--font-headings);
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 4px;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: var(--transition-smooth);
    display: inline-block;
}

.menu-dropdown:hover .menu-btn {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.menu-list {
    position: absolute;
    right: 0;
    top: calc(100% + 5px);
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    min-width: 140px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    
    /* Skrytí ve výchozím stavu */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    z-index: 9999;
}

.menu-dropdown:hover .menu-list {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.menu-item {
    font-family: var(--font-headings);
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 4px;
    margin: 4px 8px;
    transition: color 0.3s ease, background-color 0.3s ease;
    display: block;
}

.menu-item:hover {
    color: var(--accent-color);
    background-color: rgba(20, 20, 20, 0.05);
}

.light-mode .menu-item:hover {
    background-color: var(--card-bg);
}



/* SEKCE HERO */
.hero { 
    height: 100vh; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    text-align: center; 
    padding-top: 0px; 
}

.rec-indicator { 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    font-family: var(--font-headings); 
    font-size: 0.75rem; 
    letter-spacing: 0.2em; 
    color: var(--text-muted); 
    border: 1px solid var(--border-color); 
    padding: 5px 12px; 
    border-radius: 3px; 
    margin-bottom: 30px; 
}

.rec-dot { 
    width: 6px; 
    height: 6px; 
    background-color: #ff3b30; 
    border-radius: 50%; 
    box-shadow: 0 0 8px #ff3b30; 
    animation: blink 1.5s infinite;
}

.hero-title { 
    font-family: var(--font-headings); 
    font-size: calc(2.2rem + 2.5vw);
    font-weight: 200;  
    color: var(--text-color); 
    margin-bottom: 25px; 
    letter-spacing: 0.01em;
    line-height: 1.2;
}

.hero-title-first {
    font-weight: 700;
    color: var(--text-color-accent);
}

.hero-subtitle { 
    font-size: 1.05rem; 
    font-weight: 300;
    letter-spacing: 0.02em; 
    max-width: 580px; 
    line-height: 1.8; 
    color: var(--text-color-muted); 
}

.hero-subtitle strong {
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* SCROLL TLAČÍTKO */
.scroll-down { 
    position: absolute; 
    bottom: 50px; 
    left: 50%;
    transform: translateX(-50%); 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    text-decoration: none; 
    color: var(--text-muted); 
    font-size: 0.7rem; 
    letter-spacing: 0.25em; 
    text-transform: uppercase; 
    transition: var(--transition-smooth);
    will-change: transform;
}

.scroll-down:hover {
    color: var(--accent-color);
}

.scroll-line { 
    width: 1px; 
    height: 40px; 
    background-color: var(--border-color); 
    margin-top: 15px; 
    position: relative; 
    overflow: hidden;
}

.scroll-line::after { 
    content: ''; 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background-color: var(--accent-color); 
    animation: scrollAnimation 2s infinite; 
}

/* SEKCE S KARTAMI (INFO) */
.info-section { 
    padding: 140px 40px;
    padding-bottom: 340px;
    
}

.section-header { 
    margin-bottom: 70px; 
    max-width: 700px; 
}

.section-label { 
    font-family: var(--font-headings); 
    font-size: 1.5rem; 
    letter-spacing: 0.1em; 
    color: var(--accent-color); 
    margin-bottom: 20px; 
    display: block; 
}

.section-title { 
    font-family: var(--font-headings); 
    font-weight: 400; 
    font-size: 1.5rem; 
    line-height: 1.4;
    color: var(--text-color) 
}

/* GRID KARET */
.concept-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 30px; 
}

.concept-card {
    position: relative; /* Nutné pro absolutní pozicování uvnitř karty */
    overflow: hidden;   /* Zajistí, že čtverec nepřesáhne za kulaté rohy karty */  
    border: 0px solid var(--border-color); 
    background-color: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 50px 40px; 
    border-radius: 6px; 
    will-change: transform, background-color, border-color, box-shadow;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.3s ease, 
                background-color 0.3s ease, 
                box-shadow 0.3s ease;
}

.concept-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
}

.concept-card:hover { 
    border: 1px solid var(--accent-color);
    background-color: rgba(20, 20, 20, 0.05);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
    transform: scale(1.03);
}

.light-mode .concept-card:hover {
    border-color: var(--accent-color);
    background-color: var(--card-bg);
    transform: scale(1.03);
}

.card-num { 
    display: block; 
    font-family: var(--font-headings); 
    font-size: 0.85rem; 
    color: var(--accent-color); 
    margin-bottom: 30px; 
    letter-spacing: 0.1em;
}

.card-title { 
    font-family: var(--font-headings);
    font-weight: 500;
    font-size: 1.2rem; 
    margin-bottom: 5px; 
    letter-spacing: 0.02em;
}

.card-text { 
    font-size: 0.95rem; 
    color: var(--text-muted); 
    line-height: 1.7; 
    letter-spacing: 0.02em;
    font-weight: 300; 
}
.card-text strong {
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.concept-card.negative {
    background-color: var(--negative-bg);
    border-color: var(--negative-bg);
    margin-bottom: -100px;
}

.concept-card.negative .card-num,
.concept-card.negative .card-title,
.concept-card.negative .card-text,
.concept-card.negative .card-text strong {
    color: var(--negative-text);
}

.concept-card.negative:hover {
    border-color: var(--accent-color);
    background-color: var(--negative-bg);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
}

.services-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 3fr); 
    gap: 30px; 
}

.services-card {  
    position: relative; /* Nutné pro absolutní pozicování uvnitř karty */
    overflow: hidden;   /* Zajistí, že čtverec nepřesáhne za kulaté rohy karty */
    border: 0px solid var(--border-color); 
    background-color: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 20px 40px; 
    border-radius: 6px; 
    will-change: transform, background-color, border-color, box-shadow;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.3s ease, 
                background-color 0.3s ease, 
                box-shadow 0.3s ease;
}

.services-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
}

.services-card:hover { 
    border-width: 1px;
    border-color: var(--accent-color); 
    background-color: rgba(20, 20, 20, 0.05);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
    transform: scale(1.03);
}

.light-mode .services-card:hover {
    border-color: var(--accent-color);
    background-color: var(--card-bg);
    transform: scale(1.03);
}

.services-num { 
    display: block; 
    font-family: var(--font-headings); 
    font-size: 2rem; 
    color: var(--text-color); 
    margin-bottom: 0px;
    margin-top: 0px;
    margin-right: -12px;   
    letter-spacing: 0.1em;
    text-align: right;
}

.services-title { 
    font-family: var(--font-headings);
    font-weight: 500;
    font-size: 1.2rem; 
    margin-bottom: 5px; 
    letter-spacing: 0.02em;
}

.services-title accent {
    color: var(--accent-color);
}

.services-text { 
    font-size: 0.95rem; 
    color: var(--text-muted); 
    line-height: 1.7; 
    letter-spacing: 0.02em;
    font-weight: 300;
}

.services-card.negative {
    background-color: var(--negative-bg);
    border-color: var(--negative-bg);
}

.services-card.negative .services-num,
.services-card.negative .services-title,
.services-card.negative .services-text {
    color: var(--negative-text);
}

/* Zachování čtverečku v rohu a úprava chování při hoveru */
.services-card.negative:hover {
    border-color: var(--accent-color);
    background-color: var(--negative-bg);
   box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
}

.services-card.action {
    border-width: 3px;
    border-color: var(--dark-accent-color);
}

/* Skrývání čtverečku a čísla v této variantě */
.services-card.action::after,
.services-card.action .services-num {
    display: none;
}

/* Vložení SVG ikony do pravého horního rohu */
.services-card.action {
    position: relative;
}

.services-card.action::before {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 35px;
    height: 35px;
    background-image: url('img/symbol-green.svg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    animation: spin-clockwise 10s linear infinite;
}

/* Zachování chování při hoveru pro variantu action (volitelně podle potřeby) */
.services-card.action:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
    transform: scale(1.03);
}

.services-card.action .services-title {
    margin-top: calc(2.5rem + 0px); /* 2rem odpovídá výšce písma .services-num */
}

a.services-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

.contacts-grid {
    display: grid;
    grid-template-columns: 360px 1fr 360px;
    align-items: center; /* Zarovná karty a symbol vertikálně na střed */
    justify-content: space-between;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    margin-top: 20px;
}

.contacts-grid > .contact-card:first-of-type {
    justify-self: start;
}

.contacts-grid > .contact-card:last-of-type {
    justify-self: end;
}

.contact-card {
    position: relative;
    overflow: hidden;
    border: 0px solid var(--border-color);
    background-color: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 40px 50px;
    border-radius: 6px;
    width: 360px;
    will-change: transform, background-color, border-color, box-shadow;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.3s ease, 
                background-color 0.3s ease, 
                box-shadow 0.3s ease;
}

.contact-symbol {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 160px;
}

/* Vynucení šířky a výšky přímo na SVG elementu, aby se reálně zvětšilo */
.symbol-img {
    width: 200px !important;
    height: 200px !important;
    position: absolute;
    will-change: transform;
}

.symbol-dark {
    opacity: 1;
}

.symbol-light {
    opacity: 0;
}

.light-mode .symbol-dark {
    opacity: 0;
}

.light-mode .symbol-light {
    opacity: 1;
}

footer { 
    position: absolute; 
    bottom: 0px; 
    left: 0px;
    width: 100%; 
    height: 60px; 
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    mask-image: linear-gradient(to bottom, transparent 0%, black 40px);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 40px);
}

.footer-wrapper { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    color: var(--text-muted); 
    font-size: 0.8rem; 
    height: 100%;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    mask-image: linear-gradient(to bottom, transparent 0%, black 40px);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 40px);
    z-index: -1;
}

.footer-wrapper { 
    position: relative;
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    color: var(--text-muted); 
    font-size: 0.8rem; 
    height: 100%;
    pointer-events: auto;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    display: inline-block;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-link:hover {
    color: var(--accent-color);
}

#theme-toggle { 
    background: none; 
    border: 1px solid var(--border-color); 
    color: var(--text-color); 
    padding: 5px 15px; 
    cursor: pointer; 
    border-radius: 4px; 
    font-family: var(--font-sans);
    font-size: 0.75rem;
    margin-left: 20px;
    display: inline-block;
    transition: border-color 0.3s ease, color 0.3s ease;
}

#theme-toggle:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* ANIMACE A RESPONSIVITA */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.hero-showreel {
    width: 100vw;
    max-width: none;
    margin-left: calc(50% - 50vw);
    position: relative;
    aspect-ratio: 16 / 9;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
    padding: 0;
    z-index: 5;
}

#hero-showreel-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.hero-video-overlay.visible {
    background: rgba(0, 36, 24, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.light-mode .hero-video-overlay.visible {
    background: rgba(0, 36, 24, 0.2);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.hero-content-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease, visibility 1s ease;
    width: 100%;
    max-width: 900px;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.hero-content-overlay .hero-title {
    color: #ffffff;
}

.hero-content-overlay .hero-subtitle {
    color: #d7d7d7;
}

.hero-content-overlay .hero-subtitle strong {
    color: #ffffff;
}

/* --- TLAČÍTKO 1: Uvnitř videa (dole) --- */
.scroll-inside {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #ffffff;
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    transition: var(--transition-smooth);
}

.scroll-inside:hover {
    color: var(--accent-color);
}

/* --- TLAČÍTKO 2: Venku pod videem --- */
.scroll-outside {
    position: relative;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin: 60px auto 0 auto;
    transition: var(--transition-smooth);
    z-index: 15;
}

.scroll-outside:hover {
    color: var(--accent-color);
}

/* Společná čára pro obě scrollovací tlačítka */
.scroll-line {
    width: 1px;
    height: 40px;
    background-color: var(--border-color);
    margin-top: 15px;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--accent-color);
    animation: scrollAnimation 2s infinite;
}

/* --- VIDEO GRID PORTFOLIO --- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.video-card {
    position: relative;
    background-color: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.video-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
}

.video-card:hover {
    transform: scale(1.03);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
}

.video-card.negative {
    background-color: var(--negative-bg);
    border-color: var(--negative-bg);
}

.video-card.negative .card-num,
.video-card.negative .card-title,
.video-card.negative .card-text,
.video-card.negative .card-text strong {
    color: var(--negative-text);
}

.concept-card.negative:hover {
    border-color: var(--accent-color);
    background-color: var(--negative-bg);
    box-shadow: 0 0 30px rgba(52, 52, 52, 0.5);
}

.video-thumb-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.video-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-card:hover .video-thumb {
    transform: scale(1.05);
}

.play-btn-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 60px;
    height: 60px;
    background-color: rgba(0, 213, 142, 0.9);
    color: #050505;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.video-card:hover .play-btn-overlay {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.video-card-info {
    padding: 30px 25px;
}

/* --- MODÁLNÍ PŘEHRÁVAČ --- */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.modal-expanded-card {
    position: relative;
    width: 90%;
    max-width: 1280px;
    background-color: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    z-index: 1001;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.95) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-expanded-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
}

.video-modal.active .modal-expanded-card {
    transform: scale(1) translateY(0);
}

.modal-expanded-card.negative {
    background-color: var(--negative-bg);
    border-color: var(--negative-bg);
}

.modal-expanded-card.negative .modal-card-num,
.modal-expanded-card.negative .modal-card-title,
.modal-expanded-card.negative .modal-card-text,
.modal-expanded-card.negative .modal-card-desc {
    color: var(--negative-text);
}

.modal-card-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    padding: 30px 0 20px 40px;
}

.modal-video-side {
    width: 100%;
    background-color: #000;
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-video-side,
.modal-thumb-preview,
#modal-player {
    border-radius: 8px;
}

#modal-player {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-text-side {
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-card-num {
    display: block;
    font-family: var(--font-headings);
    font-size: 0.85rem;
    color: var(--accent-color);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.modal-expanded-card.negative .modal-card-num {
    color: var(--negative-text);
}

.modal-card-title {
    font-family: var(--font-headings);
    font-weight: 500;
    font-size: 2rem;
    margin-bottom: 15px;
    letter-spacing: 0.02em;
    color: var(--text-color);
}

.modal-card-text {
    font-size: 1.05rem;
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.5;
}

.modal-card-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.8;
    font-weight: 300;
}

.modal-expanded-card.negative .modal-card-desc {
    color: rgba(5, 5, 5, 0.8);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 2rem;
    cursor: pointer;
    z-index: 1002;
    transition: color 0.3s ease;
}

.modal-close-btn:hover {
    color: var(--accent-color);
}

.modal-content-box {
    position: relative;
    width: 90%;
    max-width: 1200px;
    z-index: 1001;
}

.modal-video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

#modal-player {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.modal-close-btn {
    position: absolute;
    top: -50px;
    right: 0;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 2.5rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close-btn:hover {
    color: var(--accent-color);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }
.delay-7 { transition-delay: 0.7s; }
.delay-8 { transition-delay: 0.8s; }
.delay-9 { transition-delay: 0.9s; }

@keyframes scrollAnimation { 
    0% { transform: translateY(-100%); } 
    100% { transform: translateY(100%); } 
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes spin-clockwise {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 800px) { 
    .concept-grid { 
        grid-template-columns: 1fr; 
    } 
    .concept-card.negative {
        margin-bottom: 0px;
    }
    .contacts-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }

    .contact-symbol {
        order: -1;
        margin-bottom: 20px;
    }
    .contacts-grid > .contact-card:first-of-type,
    .contacts-grid > .contact-card:last-of-type {
        justify-self: center;
    }
    .contact-card {
        width: 100%;
    }
    .video-grid {
    grid-template-columns: repeat(1, 1fr);
    }
    .modal-card-layout {
        grid-template-columns: 1fr;
    }
    .modal-text-side {
        padding: 30px;
    }
    .modal-card-layout {
        padding: 0;
    }
    .modal-expanded-card::after {
        top: calc(100vw * 0.9 * 9 / 16);
    }
    footer {
        position: relative;
        padding: 40px 0;
        bottom: 0;
    }
}