:root {
    --black: #050505;
    --dark: #0f1611;
    --green: #1d3a27;
    --green-light: #295235;
    --white: #ffffff;
    --gray: #9ba39c;
    --border: rgba(255,255,255,.08);

    --radius: 24px;

    --shadow:
        0 20px 60px rgba(0,0,0,.45);

    --transition:
        .4s cubic-bezier(.22,.61,.36,1);
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Montserrat',sans-serif;
    background:var(--black);
    color:var(--white);
    overflow-x:hidden;
}


/* ОТКЛЮЧИТЬ SELECT */
body {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
}


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

a{
    text-decoration:none;
    color:inherit;
}

.container{
    width:min(1280px,92%);
    margin:0 auto;
}


/* ==========================
   BACKGROUND
========================== */

body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:-2;

    background:
        radial-gradient(circle at 20% 20%,
        rgba(29,58,39,.35),
        transparent 35%),

        radial-gradient(circle at 80% 50%,
        rgba(29,58,39,.25),
        transparent 40%),

        linear-gradient(
        180deg,
        #050505 0%,
        #0c120e 40%,
        #050505 100%);
}

body::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    opacity:.04;
    pointer-events:none;

    background-image:
    linear-gradient(
        rgba(255,255,255,.12) 1px,
        transparent 1px),
    linear-gradient(
        90deg,
        rgba(255,255,255,.12) 1px,
        transparent 1px);

    background-size:40px 40px;
}


/* ==========================
   HEADER
========================== */

.header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    z-index:1000;

    backdrop-filter:blur(18px);
    background:rgba(5,5,5,.7);

    border-bottom:1px solid var(--border);
}

.header .container{
    height:84px;

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

.logo{
    display:flex;
    align-items:center;
    gap:14px;

    font-weight:800;
    letter-spacing:3px;
}

.logo span{
    color:#fff;
}

.logo img{
    height:44px;
}

.nav{
    display:flex;
    gap:32px;
}

.nav a{
    color:var(--gray);
    transition:var(--transition);
    position:relative;
}

.nav a:hover{
    color:white;
}

.nav a::after{
    content:"";
    position:absolute;
    bottom:-8px;
    left:0;

    width:0;
    height:2px;

    background:var(--green-light);

    transition:var(--transition);
}

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

.header-button{
    padding:14px 24px;

    border-radius:999px;

    background:var(--green);

    transition:var(--transition);
}

.header-button:hover{
    transform:translateY(-3px);
    background:var(--green-light);
}


/* ==========================
   HERO
========================== */

.hero{
    min-height:100vh;

    display:flex;
    align-items:center;

    position:relative;

    overflow:hidden;
}

.hero-background{
    position:absolute;
    inset:0;

    background:
    radial-gradient(circle at 75% 50%,
    rgba(41,82,53,.35),
    transparent 35%);
}

.hero-content{
    display:grid;
    grid-template-columns:1.1fr 1fr;
    gap:80px;
    align-items:center;
}

.hero-badge{
    display:inline-flex;

    padding:12px 18px;

    border-radius:999px;

    border:1px solid rgba(255,255,255,.1);

    background:rgba(255,255,255,.04);

    margin-bottom:24px;

    color:#d4d4d4;
    font-size:.9rem;
}

.hero h1{
    font-size:clamp(3rem,7vw,6.5rem);
    line-height:.9;
    font-weight:800;
}

.hero h1 span{
    color:#ffffff;
    text-shadow:
        0 0 20px rgba(255,255,255,.15);
}

.hero p{
    max-width:640px;

    margin-top:30px;

    color:var(--gray);

    font-size:1.15rem;
    line-height:1.8;
}

.hero-buttons{
    display:flex;
    gap:18px;

    margin-top:40px;
}

.hero-image{
    width:100%;
    margin:40px;
    filter:
        drop-shadow(0 0 80px rgba(29,58,39,.45));

    animation:
        float 6s ease-in-out infinite;
}


/* ==========================
   BUTTONS
========================== */

.button{
    display:inline-flex;
    align-items:center;
    justify-content:center;

    min-width:200px;

    padding:18px 28px;

    border-radius:999px;

    transition:var(--transition);
}

.button-primary{
    background:var(--green);
}

.button-primary:hover{
    background:var(--green-light);

    transform:
        translateY(-4px)
        scale(1.03);
}

.button-secondary{
    border:1px solid rgba(255,255,255,.12);
    background:rgba(255,255,255,.04);
}

.button-secondary:hover{
    background:rgba(255,255,255,.08);
}


/* ==========================
   SECTION
========================== */

.section{
    padding:100px 0 50px 0;
}

.dark-section{
    background:
    linear-gradient(
    180deg,
    rgba(18,28,21,.5),
    rgba(8,8,8,.7));
}

.section-title{
    text-align:center;
    margin-bottom:70px;
}

.section-title h2{
    font-size:clamp(2rem,5vw,4rem);
    font-weight:800;
}


/* ==========================
   CARDS
========================== */

.glass-card,
.feature-card,
.kit-card,
.cta-card{
    background:
    rgba(255,255,255,.04);

    backdrop-filter:blur(20px);

    border:1px solid var(--border);

    border-radius:var(--radius);
}

.glass-card{
    padding:40px;
}

.about-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:40px;
}

.about-image{
    border-radius:18px;
    width:100%;
    height:100%;
    object-fit:cover;
}


/* ==========================
   FEATURES
========================== */

.features-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:30px;
}

.feature-card{
    padding:38px;
    transition:var(--transition);
}

.feature-card:hover{
    transform:
        translateY(-10px);

    border-color:
        rgba(41,82,53,.8);
}

.feature-number{
    font-size:4rem;
    font-weight:800;

    color:rgba(255,255,255,.08);

    margin-bottom:16px;
}

.feature-card h3{
    margin-bottom:15px;
}

.feature-card p{
    color:var(--gray);
    line-height:1.7;
}


/* ==========================
   KIT
========================== */

.kit-grid{
    display:grid;
    grid-template-columns:
    repeat(3,1fr);

    gap:30px;
}

.kit-card{
    padding:30px;
    text-align:center;
    transition:var(--transition);
}

.kit-card:hover{
    transform:
        translateY(-10px)
        scale(1.02);
}

.kit-card img{
    height:200px;
    border-radius:20px;
    margin:auto;
    object-fit:contain;
}

.kit-card h3{
    margin-top:20px;
}


/* ==========================
   ADVANTAGES
========================== */

.advantages{
    display:grid;
    gap:24px;
}

.advantage{
    padding:28px 32px;

    border-left:4px solid var(--green-light);

    background:
        rgba(255,255,255,.03);

    font-size:1.05rem;

    transition:var(--transition);
}

.advantage:hover{
    transform:translateX(10px);
}


/* ==========================
   FAQ
========================== */

.faq{
    max-width:900px;
    margin:auto;
}

.faq-item{
    margin-bottom:20px;

    border:1px solid var(--border);

    border-radius:20px;

    overflow:hidden;
}

.faq-question{
    width:100%;

    background:none;
    border:none;

    color:white;

    padding:24px;

    text-align:left;

    font-size:1rem;
    font-weight:600;

    cursor:pointer;
}

.faq-answer{
    max-height:0;

    overflow:hidden;

    color:var(--gray);

    transition:
        max-height .5s ease,
        padding .5s ease;

    padding:0 24px;
}

.faq-item.active .faq-answer{
    max-height:250px;
    padding:0 24px 24px;
}


/* ==========================
   CTA
========================== */

.cta{
    padding:140px 0;
}

.cta-card{
    padding:40px;

    text-align:center;

    background:
    linear-gradient(
        135deg,
        rgba(29,58,39,.8),
        rgba(15,22,17,.9));
}

.cta-card h2{
    font-size:clamp(2rem,4vw,3.4rem);
    margin-bottom:24px;
}

.cta-card p{
    color:#d7d7d7;
    margin-bottom:40px;
}

.cta-subtitle{
    display:inline-block;
    color:#9ba39c;
    text-transform:uppercase;
    letter-spacing:3px;
    margin-bottom:20px;
}

.contact-buttons{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:40px;
    margin-top:40px;
}

.social-button{
    width:150px;

    display:flex;
    align-items:center;
    justify-content:center;

    border-radius:20px;

    background:rgba(255,255,255,.05);

    border:1px solid rgba(255,255,255,.08);

    transition:.3s;
}

.social-button:hover{
    transform:translateY(-6px);

    background:rgba(255,255,255,.12);

    box-shadow:
        0 10px 30px rgba(0,0,0,.3);
}

.social-button.primary{
    background:#1d3a27;
}

.social-button.primary:hover{
    background:#295235;
}


.comparison-block{
    display:flex;
    align-items:center;
    gap:10px;
    width:100%;
}

.comparison-image{
    flex:1;

    overflow:hidden;

    background:rgba(255,255,255,.03);

    border:1px solid rgba(255,255,255,.08);

    display:flex;
    flex-direction:column;

    min-height:420px;
}

.comparison-image.left{
    border-radius:24px 0 0 24px;
}

.comparison-image.right{
    border-radius:0 24px 24px 0;
}

.comparison-photo{
    flex:1;

    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;

    min-height:340px;
}

.comparison-label{
    height:70px;

    display:flex;
    align-items:center;
    justify-content:center;

    text-align:center;

    padding:0 15px;

    background:rgba(0,0,0,.7);

    backdrop-filter:blur(10px);

    color:#fff;

    font-weight:600;

    letter-spacing:1px;
}

.comparison-arrow{
    width:30px;
    height:30px;

    display:flex;
    align-items:center;
    justify-content:center;

    flex-shrink:0;

    background:
        rgba(255,255,255,.05);

    border:1px solid rgba(255,255,255,.08);

    border-radius:50%;

    backdrop-filter:blur(10px);
}

.comparison-arrow svg{
    width:32px;
    height:32px;
}


.social-button img{
    width:fit-content;
    padding: 20px;

    object-fit:contain;
}
/* ==========================
   FOOTER
========================== */

.footer{
    border-top:1px solid var(--border);
    padding:40px 0;
}

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

.footer-logo{
    display:flex;
    align-items:center;
    gap:12px;
    font-weight:700;
}

.copyright{
    color:var(--gray);
}


/* ==========================
   REVEAL ANIMATION
========================== */

.reveal{
    opacity:0;
    transform:translateY(50px);
    transition:
        opacity .9s ease,
        transform .9s ease;
}

.reveal.active{
    opacity:1;
    transform:none;
}


/* ==========================
   ANIMATIONS
========================== */

@keyframes float{
    0%,100%{
        transform:translateY(0);
    }
    50%{
        transform:translateY(-20px);
    }
}

@keyframes scrollDot{
    0%{
        opacity:0;
        top:8px;
    }

    50%{
        opacity:1;
    }

    100%{
        opacity:0;
        top:24px;
    }
}


/* ==========================
   RESPONSIVE
========================== */

@media (max-width:1100px){

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

    .hero{
        padding-top:120px;
    }

    .hero-right{
        order:-1;
    }

    .features-grid,
    .kit-grid{
        grid-template-columns:1fr;
    }
}

@media (max-width:768px){

    .nav{
        display:none;
    }

    .hero-buttons{
        flex-direction:column;
    }

    .footer .container{
        flex-direction:column;
        gap:16px;
        text-align:center;
    }

    .cta-card{
        padding:50px 24px;
    }
}

.nav-active{
    color:#fff !important;
}

.nav-active::after{
    width:100% !important;
}

.hero-bg-image{
    position:absolute;
    inset:0;

    background-image:
        url("img/forest.jpg");

    background-size:cover;
    background-position:center;

    z-index:-2;

    filter:
        blur(6px)
        brightness(.35);

    transform:scale(1.1);
}

/*  */

@media (max-width:900px){

    .comparison-block{
        flex-direction:column;
    }

    .comparison-image.left{
        border-radius:24px 24px 0 0;
    }

    .comparison-image.right{
        border-radius:0 0 24px 24px;
    }

    .comparison-arrow{
        transform:rotate(90deg);
    }
}