:root{
    --accent:#ffc400;
    --dark:#111;
    --text:#222;
    --text-light:#666;
    --bg:#f7f8fa;
    --white:#fff;
    --radius:20px;
    --transition:.3s;
}

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

html{
    scroll-behavior:smooth;
}

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

.container{
    width:90%;
    max-width:1300px;
    margin:0 auto;
}

/* HEADER */

.header{
    position:sticky;
    top:0;
    z-index:1000;
    background:var(--dark);
    border-bottom:2px solid var(--accent);
    box-shadow:0 5px 20px rgba(0,0,0,.15);
}

.header .container{
    height:85px;
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.logo{
    display:flex;
    align-items:center;
    text-decoration:none;
    color:var(--white);
}

.logo-img{
    width:70px;
    height:auto;
    display:block;
}

.nav ul{
    display:flex;
    gap:35px;
    list-style:none;
}

.nav a{
    text-decoration:none;
    color:var(--white);
    font-weight:600;
    transition:color var(--transition);
}

.nav a:hover,
.nav a.current{
    color:var(--accent);
}

.header-btn,
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    text-decoration:none;
    font-weight:700;
    border-radius:12px;
    transition:var(--transition);
}

.header-btn{
    background:var(--accent);
    color:var(--dark);
    padding:14px 25px;
}

.header-btn:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 25px rgba(255,196,0,.35);
}

/* HERO */

.hero,
.about,
.services,
.projects,
.advantages,
.contacts{
    padding:100px 0;
    position:relative;
}

.hero-content,
.about-grid,
.contacts-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:60px;
    align-items:center;
}

.hero-subtitle{
    color:#888;
    text-transform:uppercase;
    letter-spacing:2px;
    font-size:.9rem;
}

.hero h1{
    font-size:4rem;
    line-height:1.1;
    margin:20px 0;
    font-weight:800;
}

.hero p,
.about p,
.contact-info p{
    color:var(--text-light);
    line-height:1.8;
}

.hero p{
    font-size:1.1rem;
    max-width:600px;
}

.hero-buttons{
    display:flex;
    gap:15px;
    margin-top:35px;
}

.btn{
    padding:16px 28px;
}

.btn-primary{
    background:var(--accent);
    color:var(--dark);
	cursor: pointer;
}

.btn-primary:hover{
    transform:translateY(-3px);
    box-shadow:0 15px 35px rgba(255,196,0,.35);
}

.btn-secondary{
    border:2px solid #ddd;
    color:var(--text);
}

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

.hero-image img,
.about-image img{
    width:100%;
    border-radius:25px;
}

.hero-image img{
    box-shadow:0 25px 60px rgba(0,0,0,.12);
}

/* COMMON SECTION LINE */

.about::before,
.services::before,
.projects::before,
.advantages::before,
.contacts::before{
    content:'';
    position:absolute;
    top:0;
    left:50%;
    transform:translateX(-50%);
    width:70%;
    height:2px;
    background:linear-gradient(to right,transparent,var(--dark) 50%,var(--dark) 50%,transparent);
}

/* STATS */

.stats{
    margin-bottom:100px;
}

.stats-grid,
.services-grid,
.advantages-grid{
    display:grid;
    gap:25px;
}

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

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

.stat-card,
.feature,
.service-card,
.contact-form{
    background:var(--white);
}

.stat-card{
    padding:35px;
    border-radius:var(--radius);
    text-align:center;
    box-shadow:0 10px 30px rgba(0,0,0,.05);
    transition:transform var(--transition);
}

.stat-card:hover{
    transform:translateY(-6px);
}

.stat-card h3,
.advantage-card h3{
    color:var(--accent);
    font-size:2rem;
    margin-bottom:10px;
}

.stat-card p{
    color:var(--text-light);
}

.section-title{
    text-align:center;
    margin-bottom:60px;
}

.section-title h2,
.about h2,
.contact-info h2{
    font-size:2.8rem;
}

.about-features{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:20px;
    margin-top:35px;
}

.feature{
    padding:20px;
    border-radius:15px;
    display:flex;
    align-items:center;
    gap:15px;
    box-shadow:0 8px 25px rgba(0,0,0,.05);
}

.feature i,
.contact-item i{
    color:var(--accent);
}

.service-card{
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,.05);
    transition:.35s;
}

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

.service-card img{
    width:100%;
    height:230px;
    object-fit:cover;
}

.service-card h3{
    padding:25px;
    text-align:center;
}

.projects-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:25px;
}

.project-card{
    overflow:hidden;
    border-radius:var(--radius);
}

.project-card img{
    width:100%;
    height:350px;
    object-fit:cover;
    transition:.5s;
}

.project-card:hover img{
    transform:scale(1.08);
}

.advantage-card{
    background:var(--dark);
    color:var(--white);
    text-align:center;
    border-radius:var(--radius);
    padding:40px;
}

.contact-info p{
    margin-bottom:30px;
}

.contact-item{
    display:flex;
    gap:15px;
    margin-bottom:20px;
    font-weight:600;
}

.contact-item a{
    color:inherit;
    text-decoration:none;
}

.contact-form{
    padding:40px;
    border-radius:25px;
    box-shadow:0 15px 40px rgba(0,0,0,.05);
    display:flex;
    flex-direction:column;
    gap:20px;
}

.contact-form input,
.contact-form textarea{
    width:100%;
    border:1px solid #ddd;
    border-radius:12px;
    padding:16px;
    font-family:inherit;
}

.contact-form textarea{
    height:180px;
    resize:none;
}

.footer{
    background:var(--dark);
    color:var(--white);
    text-align:center;
    padding:35px 0;
    margin-top:50px;
}

.burger{
    display:none;
    flex-direction:column;
    gap:5px;
    cursor:pointer;
}

.burger span{
    width:25px;
    height:3px;
    background:var(--white);
}

.hidden{
    opacity:0;
    transform:translateY(40px);
    transition:opacity .8s ease, transform .8s ease;
}

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

.success-modal{
    position:fixed;
    inset:0;
    background:rgba(0,0,0,.55);
    display:none;
    justify-content:center;
    align-items:center;
    z-index:9999;
}

.success-modal.show{
    display:flex;
}

.success-modal-content{
    background:#fff;
    width:90%;
    max-width:500px;
    padding:40px;
    border-radius:25px;
    text-align:center;
    animation:popup .35s ease;
}

.success-icon{
    width:90px;
    height:90px;
    margin:0 auto 20px;
    border-radius:50%;
    background:var(--accent);
    color:var(--dark);
    font-size:50px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
}

.success-modal p{
    color:var(--text-light);
    line-height:1.7;
}

.success-modal button{
    margin-top:25px;
    border:none;
    background:var(--accent);
    color:var(--dark);
    padding:14px 28px;
    border-radius:12px;
    cursor:pointer;
    font-weight:700;
}

@keyframes popup{
    from{opacity:0;transform:translateY(30px);}
    to{opacity:1;transform:translateY(0);}
}

@media (max-width:1100px){
    .hero-content,
    .about-grid,
    .contacts-grid{
        grid-template-columns:1fr;
    }

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

@media (max-width:768px){

    .nav{
        display:none;
        position:absolute;
        top:85px;
        left:0;
        width:100%;
        background:var(--dark);
        padding:20px 0;
        box-shadow:0 10px 30px rgba(0,0,0,.08);
    }

    .nav.active{
        display:block;
    }

    .nav ul{
        flex-direction:column;
        align-items:center;
        gap:20px;
    }

    .burger{
        display:flex;
    }

    .header-btn{
        display:none;
    }

    .hero h1{
        font-size:2.6rem;
    }

    .services-grid,
    .projects-grid,
    .advantages-grid,
    .stats-grid,
    .about-features{
        grid-template-columns:1fr;
    }

    .section-title h2{
        position:relative;
        display:inline-block;
        padding-bottom:15px;
    }

    .section-title h2::after{
        content:'';
        position:absolute;
        left:50%;
        bottom:0;
        transform:translateX(-50%);
        width:70px;
        height:4px;
        background:var(--accent);
        border-radius:50px;
    }

    .about,
    .services,
    .projects,
    .advantages,
    .contacts{
        border-top:3px solid #cfcfcf;
    }

}

.header.scrolled{
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
}

/* === FIXED TABLET & MOBILE === */

/* Burger menu also on tablets/iPad */
@media (max-width: 1024px){
    .burger{display:flex;}
    .header-btn{display:none;}
    .nav{
        display:none;
        position:absolute;
        top:85px;
        left:0;
        width:100%;
        background:var(--dark);
        padding:20px 0;
        box-shadow:0 10px 30px rgba(0,0,0,.08);
    }
    .nav.active{display:block;}
    .nav ul{
        flex-direction:column;
        align-items:center;
        gap:20px;
    }
}

/* Remove ugly separator lines on mobile/tablet */
@media (max-width: 1024px){
    .about::before,
    .services::before,
    .projects::before,
    .advantages::before,
    .contacts::before{
        display:none !important;
    }

    .about,
    .services,
    .projects,
    .advantages,
    .contacts{
        border-top:none !important;
    }
}

/* Better responsive spacing */
@media (max-width: 1024px){
    .hero-content,
    .about-grid,
    .contacts-grid{
        grid-template-columns:1fr;
        gap:40px;
    }

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

@media (max-width:768px){
    .hero h1{font-size:2.2rem;}
    .hero-buttons{flex-direction:column;}
    .btn{width:100%;}
    .projects-grid,
    .services-grid,
    .advantages-grid,
    .stats-grid,
    .about-features{
        grid-template-columns:1fr;
    }
}

@media (max-width:480px){
    .hero h1{font-size:1.9rem;}
}