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

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    background: #111;
    color: #e0e0e0;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

section {
    padding: 60px 0;
}

/* HERO */
.hero {
    text-align: center;
}
.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
}
.hero p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}
.hero .btn {
    background: #ff6600;
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
}

/* SLIDER – FULLSCREEN s vylepšeným overlay */
.slider {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100vh;          /* FULLSCREEN */
    max-height: 100vh;
}

.slider-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.slider .slide {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-in-out;
}

.slider .slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.slider .slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.slider .slide img[style*="display: block"] {
    opacity: 1;
}

/* Overlay */
.slide-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35); /* lehce průhlednější pro čitelnost */
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    text-align: center;
    transition: all 0.6s ease-in-out;
}

.slide-overlay h3 {
    font-size: 2rem;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    transition: font-size 0.3s ease;
}

.slide-overlay p {
    font-size: 1.1rem;
    line-height: 1.4;
    transition: font-size 0.3s ease;
}

/* Responsivní overlay */
@media (max-width: 1024px) {
    .slide-overlay {
        padding: 1.5rem;
    }

    .slide-overlay h3 {
        font-size: 1.6rem;
    }

    .slide-overlay p {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .slide-overlay {
        padding: 1rem;
    }

    .slide-overlay h3 {
        font-size: 1.4rem;
    }

    .slide-overlay p {
        font-size: 0.9rem;
    }
}

/* DOTS */
.slider-dots {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.8rem;
    z-index: 10;
}

.slider-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s ease;
    border: none;
    padding: 0;
}

.slider-dots .dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

.slider-dots .dot.active {
    background: #ff6600;
}

/* VIDEO */
.video-section {
    text-align: center;
    margin-bottom: 2rem;
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

video {
    width: 100%;
    height: auto;
    border-radius: 8px;
    background: #000;
}

/* TEXT SECTIONS */
#about, #benefits, #safety, #faq {
    text-align: center;
}

#about h2, #benefits h2, #safety h2, #faq h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

#about p, #benefits p, #safety p, #faq p, 
#benefits ul, #safety ul, #faq ul {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

#benefits ul, #safety ul, #faq ul {
    list-style: none;
    padding: 0;
}

/* CONTACT */
#contact {
    text-align: center;
}

.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.contact-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #ccc;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #ff6600;
    background: rgba(255,255,255,0.15);
}

.form-submit {
    text-align: center;
    margin-top: 2rem;
}

.btn-submit {
    background: transparent;
    border: 2px solid #ff6600;
    color: #ff6600;
    padding: 0.8rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: #ff6600;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 102, 0, 0.4);
}

/* FOOTER */
.site-footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
}

.site-footer a {
    color: #ff6600;
}

/* RESPONSIVE HERO */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }
}