/* 
   Filtry Vzduchu - Main Stylesheet
   Color Palette:
   - Main background: #0A1128 (dark blue, almost black)
   - Accents: #FFDC00 (bright yellow), #7FDBFF (neon blue), #2ECC40 (lime green)
   - Text: #FFFFFF and #CCCCCC
   - Interface elements: gradients between #0A1128 and #7FDBFF
*/

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

html {
    font-size: 62.5%; /* 10px = 1rem */
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1.6rem;
    line-height: 1.6;
    color: #FFFFFF;
    background-color: #0A1128;
    overflow-x: hidden;
}

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

a {
    color: #7FDBFF;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #FFDC00;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 2rem;
    line-height: 1.2;
}

h1 {
    font-size: 4.8rem;
    font-weight: 700;
}

h2 {
    font-size: 3.6rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 6rem;
    height: 0.3rem;
    background: linear-gradient(90deg, #7FDBFF, #2ECC40);
    border-radius: 0.5rem;
}

h3 {
    font-size: 2.4rem;
    font-weight: 600;
}

p {
    margin-bottom: 1.6rem;
}

/* ===== Buttons ===== */
.btn-primary, 
.btn-secondary {
    display: inline-block;
    padding: 1.2rem 2.4rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(90deg, #7FDBFF, #2ECC40);
    color: #0A1128;
    box-shadow: 0 0 15px rgba(127, 219, 255, 0.5);
}

.btn-primary:hover {
    box-shadow: 0 0 25px rgba(127, 219, 255, 0.8);
    color: #0A1128;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #7FDBFF;
    color: #7FDBFF;
}

.btn-secondary:hover {
    background-color: rgba(127, 219, 255, 0.1);
    transform: translateY(-2px);
    color: #FFFFFF;
}

/* ===== Header & Navigation ===== */
.main-header {
    padding: 2rem 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(10, 17, 40, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

.logo {
    max-width: 15rem;
}

.logo-img {
    height: 5rem;
    width: auto;
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
}

.main-nav .nav-list {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    color: #FFFFFF;
    font-weight: 500;
    font-size: 1.6rem;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -0.5rem;
    left: 0;
    background: linear-gradient(90deg, #7FDBFF, #2ECC40);
    transition: width 0.3s ease;
}

.main-nav a:hover::after {
    width: 100%;
}

.nav-cta {
    background: linear-gradient(90deg, #7FDBFF, #2ECC40);
    color: #0A1128 !important;
    padding: 0.8rem 1.6rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(127, 219, 255, 0.5);
}

.nav-cta:hover {
    box-shadow: 0 0 15px rgba(127, 219, 255, 0.8);
    transform: translateY(-2px);
}

.nav-cta::after {
    display: none !important;
}

/* ===== Hero Section ===== */
.hero {
    height: 100vh;
    min-height: 60rem;
    display: flex;
    align-items: center;
    background: linear-gradient(to bottom, rgba(10, 17, 40, 0.9), rgba(10, 17, 40, 0.7)), url('./img/Sg3LY3.jpg') no-repeat center center/cover;
    text-align: center;
    padding-top: 9rem;
}

.hero h1 {
    font-size: 5.6rem;
    margin-bottom: 2rem;
    text-shadow: 0 0 10px rgba(127, 219, 255, 0.5);
    animation: fadeIn 1s ease-in-out;
}

.hero p {
    font-size: 2.2rem;
    max-width: 80rem;
    margin: 0 auto 4rem;
    color: #CCCCCC;
    animation: fadeIn 1.5s ease-in-out;
}

.hero .btn-primary {
    animation: fadeIn 2s ease-in-out;
}

/* ===== Benefits Section ===== */
.benefits {
    background-color: rgba(10, 17, 40, 0.95);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: 4rem;
}

.benefit-card {
    background: linear-gradient(145deg, rgba(10, 17, 40, 0.8), rgba(15, 30, 60, 0.8));
    border-radius: 1rem;
    overflow: hidden;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(127, 219, 255, 0.2);
}

.benefit-img {
    height: 20rem;
    object-fit: cover;
    border-radius: 0.5rem;
    margin: 0 auto 2rem;
}

.benefit-card h3 {
    color: #7FDBFF;
}

.benefit-card p {
    color: #CCCCCC;
}

/* ===== How It Works Section ===== */
.how-it-works {
    background: linear-gradient(to right, rgba(10, 17, 40, 0.95), rgba(15, 30, 60, 0.95));
}

.process-steps {
    max-width: 80rem;
    margin: 0 auto 5rem;
}

.step {
    display: flex;
    margin-bottom: 4rem;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 5rem;
    left: 2.5rem;
    height: calc(100% - 3rem);
    width: 0.2rem;
    background: linear-gradient(to bottom, #7FDBFF, #2ECC40);
}

.step-number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 5rem;
    height: 5rem;
    background: linear-gradient(145deg, #7FDBFF, #2ECC40);
    color: #0A1128;
    font-weight: 700;
    font-size: 2.4rem;
    border-radius: 50%;
    margin-right: 2rem;
    flex-shrink: 0;
    box-shadow: 0 0 15px rgba(127, 219, 255, 0.5);
    z-index: 1;
}

.step-content {
    padding-top: 0.5rem;
}

.step-content h3 {
    color: #FFDC00;
    margin-bottom: 1rem;
}

.step-content p {
    color: #CCCCCC;
}

.info-graphic {
    margin-top: 5rem;
    text-align: center;
}

.full-width-img {
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin: 0 auto;
}

/* ===== Products Section ===== */
.products {
    background-color: rgba(10, 17, 40, 0.95);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: 4rem;
}

.product-card {
    background: linear-gradient(145deg, rgba(10, 17, 40, 0.8), rgba(15, 30, 60, 0.8));
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 3rem;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(127, 219, 255, 0.2);
}

.product-img {
    height: 20rem;
    object-fit: cover;
    border-radius: 0.5rem;
    margin-bottom: 2rem;
}

.product-card h3 {
    color: #7FDBFF;
    text-align: center;
    margin-bottom: 1.5rem;
}

.product-card p {
    color: #CCCCCC;
    margin-bottom: 2rem;
}

.product-card ul {
    margin-bottom: 3rem;
    color: #CCCCCC;
}

.product-card li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 2.5rem;
}

.product-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2ECC40;
    font-weight: bold;
}

.product-card .btn-secondary {
    display: block;
    width: 100%;
}

/* ===== Testimonials Section ===== */
.testimonials {
    background: linear-gradient(to right, rgba(10, 17, 40, 0.95), rgba(15, 30, 60, 0.95));
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30rem, 1fr));
    gap: 4rem;
}

.testimonial-card {
    background: linear-gradient(145deg, rgba(10, 17, 40, 0.8), rgba(15, 30, 60, 0.8));
    border-radius: 1rem;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 1rem;
    left: 2rem;
    font-size: 8rem;
    color: rgba(127, 219, 255, 0.2);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-text {
    position: relative;
    z-index: 1;
}

.testimonial-text p {
    font-style: italic;
    color: #FFFFFF;
}

.testimonial-author {
    text-align: right;
    color: #7FDBFF;
    font-weight: 600;
}

/* ===== About Section ===== */
.about {
    background-color: rgba(10, 17, 40, 0.95);
}

.about-content {
    max-width: 80rem;
    margin: 0 auto;
}

.about-text {
    color: #CCCCCC;
}

.about-text ul {
    margin: 2rem 0;
    padding-left: 2rem;
}

.about-text li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 2.5rem;
}

.about-text li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2ECC40;
    font-weight: bold;
}

/* ===== Order Form Section ===== */
.order-form {
    background: linear-gradient(to right, rgba(10, 17, 40, 0.95), rgba(15, 30, 60, 0.95));
}

.custom-form {
    max-width: 60rem;
    margin: 0 auto;
    background: linear-gradient(145deg, rgba(10, 17, 40, 0.8), rgba(15, 30, 60, 0.8));
    padding: 4rem;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.form-group {
    margin-bottom: 2.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"] {
    width: 100%;
    padding: 1.2rem;
    border: 1px solid rgba(127, 219, 255, 0.3);
    border-radius: 0.5rem;
    background-color: rgba(10, 17, 40, 0.5);
    color: #FFFFFF;
    font-size: 1.6rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #7FDBFF;
    box-shadow: 0 0 10px rgba(127, 219, 255, 0.5);
}

.radio-group-label {
    font-weight: 500;
    margin-bottom: 1.2rem;
}

.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: center;
}

.radio-option input,
.checkbox-option input {
    margin-right: 1rem;
}

.custom-form .btn-primary {
    width: 100%;
    margin-top: 1rem;
}

/* ===== FAQ Section ===== */
.faq {
    background-color: rgba(10, 17, 40, 0.95);
}

.faq-items {
    max-width: 80rem;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(127, 219, 255, 0.2);
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h3 {
    color: #FFDC00;
    margin-bottom: 1.5rem;
    position: relative;
    padding-left: 3rem;
}

.faq-item h3::before {
    content: 'Q:';
    position: absolute;
    left: 0;
    color: #7FDBFF;
}

.faq-item p {
    color: #CCCCCC;
    padding-left: 3rem;
    position: relative;
}

.faq-item p::before {
    content: 'A:';
    position: absolute;
    left: 0;
    color: #2ECC40;
}

/* ===== Footer ===== */
.main-footer {
    background-color: rgba(5, 10, 25, 0.95);
    padding: 6rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    max-width: 30rem;
}

.footer-logo-img {
    height: 5rem;
    width: auto;
    margin-bottom: 2rem;
}

.footer-logo p {
    color: #CCCCCC;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.footer-column h3 {
    color: #7FDBFF;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.footer-column ul li {
    margin-bottom: 1rem;
}

.footer-column a {
    color: #CCCCCC;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #FFDC00;
}

.footer-column address {
    font-style: normal;
    color: #CCCCCC;
}

.footer-column address p {
    margin-bottom: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(127, 219, 255, 0.2);
    color: #CCCCCC;
}

/* ===== Cookie Consent ===== */
.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(5, 10, 25, 0.95);
    padding: 2rem 0;
    z-index: 1000;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
}

.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.cookie-content p {
    margin-bottom: 0;
    flex: 1;
    min-width: 30rem;
}

.btn-cookie {
    background: linear-gradient(90deg, #7FDBFF, #2ECC40);
    color: #0A1128;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cookie:hover {
    box-shadow: 0 0 15px rgba(127, 219, 255, 0.5);
}

.cookie-more {
    color: #7FDBFF;
    margin-left: 1rem;
}

/* ===== Thank You Page ===== */
.thank-you {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 9rem;
}

.thank-you-content {
    max-width: 70rem;
    margin: 0 auto;
}

.thank-you h1 {
    color: #2ECC40;
    margin-bottom: 2rem;
}

.thank-you p {
    font-size: 2rem;
    margin-bottom: 4rem;
}

.thank-you-actions {
    margin-top: 3rem;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(127, 219, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(127, 219, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(127, 219, 255, 0);
    }
}

/* ===== Responsive Styles ===== */
@media screen and (max-width: 1024px) {
    html {
        font-size: 60%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-logo {
        margin: 0 auto;
        text-align: center;
    }
    
    .footer-logo-img {
        margin: 0 auto 2rem;
    }
}

@media screen and (max-width: 768px) {
    html {
        font-size: 58%;
    }
    
    section {
        padding: 6rem 0;
    }
    
    .hero h1 {
        font-size: 4.2rem;
    }
    
    .hero p {
        font-size: 1.8rem;
    }
    
    .nav-toggle-label {
        display: block;
        position: relative;
        height: 2.5rem;
        width: 3.5rem;
        cursor: pointer;
    }
    
    .nav-toggle-label span,
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        position: absolute;
        height: 0.3rem;
        width: 100%;
        background-color: #FFFFFF;
        border-radius: 0.2rem;
        transition: all 0.3s ease;
    }
    
    .nav-toggle-label span {
        top: 50%;
        transform: translateY(-50%);
    }
    
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        content: '';
    }
    
    .nav-toggle-label span::before {
        top: -0.8rem;
    }
    
    .nav-toggle-label span::after {
        bottom: -0.8rem;
    }
    
    .nav-toggle:checked + .nav-toggle-label span {
        background-color: transparent;
    }
    
    .nav-toggle:checked + .nav-toggle-label span::before {
        top: 0;
        transform: rotate(45deg);
    }
    
    .nav-toggle:checked + .nav-toggle-label span::after {
        bottom: 0;
        transform: rotate(-45deg);
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: rgba(10, 17, 40, 0.95);
        padding: 2rem;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
        clip-path: circle(0% at top right);
        transition: clip-path 0.5s ease;
    }
    
    .nav-toggle:checked ~ .main-nav {
        clip-path: circle(150% at top right);
    }
    
    .main-nav .nav-list {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .custom-form {
        padding: 3rem 2rem;
    }
}

@media screen and (max-width: 480px) {
    html {
        font-size: 55%;
    }
    
    h1 {
        font-size: 3.6rem;
    }
    
    h2 {
        font-size: 3rem;
    }
    
    .hero {
        min-height: 50rem;
    }
    
    .hero h1 {
        font-size: 3.6rem;
    }
    
    .cookie-content p {
        min-width: auto;
    }
}