/* Osnovna podešavanja i moderni fontovi */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { background-color: #f8f9fa; color: #2d3748; line-height: 1.7; overflow-x: hidden; width: 100%; }
.kontejner { width: 90%; max-width: 1100px; margin: 0 auto; }

/* Header - Bolja senka i mobilni prikaz */
.glavni-header { 
    background-color: #0A192F; 
    padding: 10px 0; 
    position: sticky; 
    top: 0; 
    z-index: 100;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}
.navigacija-flex { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    flex-wrap: wrap; 
}

/* Trik da logo sa belom pozadinom izgleda kao dizajnirana vizit-karta */
.logo img {
    border-radius: 4px;
    padding: 2px;
    background-color: white;
    max-width: 100%;
    display: block;
}

.meni { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.meni a { 
    color: #e2e8f0; 
    text-decoration: none; 
    font-weight: 600; 
    font-size: 15px;
    transition: color 0.3s; 
    text-transform: uppercase;
    letter-spacing: 1px;
}
.meni a:hover { color: #D32F2F; }

/* HERO SEKCIJA SA SLIKOM RADNIKA */
.hero { 
    background: linear-gradient(rgba(10, 25, 47, 0.75), rgba(10, 25, 47, 0.9)), url('../img/radnik.jpg') center/cover no-repeat;
    color: white; 
    padding: 160px 0; 
    text-align: center; 
}
.hero h2 { font-size: 48px; margin-bottom: 20px; text-shadow: 2px 2px 4px rgba(0,0,0,0.5); }
.hero p { font-size: 20px; margin-bottom: 40px; max-width: 800px; margin-left: auto; margin-right: auto; color: #cbd5e0; }

/* Dugme - Napredniji stil sa animacijom */
.btn-crveni { 
    display: inline-block; 
    background-color: #D32F2F; 
    color: white; 
    padding: 15px 35px; 
    text-decoration: none; 
    font-size: 18px; 
    font-weight: bold; 
    border-radius: 8px; 
    border: none; 
    cursor: pointer; 
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.4);
}
.btn-crveni:hover { 
    background-color: #b71c1c; 
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(211, 47, 47, 0.6);
}

/* Sekcije i naslovi */
.sekcija { padding: 80px 0; text-align: center; }
.sekcija h2 { font-size: 36px; margin-bottom: 30px; color: #0A192F; position: relative; display: inline-block; }
.sekcija h2::after {
    content: '';
    position: absolute;
    width: 60%;
    height: 3px;
    background-color: #D32F2F;
    bottom: -10px;
    left: 20%;
}
.svetla { background-color: #ffffff; }
.tamna { background-color: #f1f5f9; }

.sekcija p { font-size: 17px; color: #4a5568; max-width: 900px; margin: 0 auto 15px auto; line-height: 1.8; }

/* Premium kartica za listu usluga */
.lista-usluga { 
    text-align: left; 
    max-width: 800px; 
    margin: 40px auto; 
    background: white; 
    padding: 40px; 
    border-radius: 12px; 
    box-shadow: 0 10px 25px rgba(0,0,0,0.08); 
    border-left: 5px solid #D32F2F;
}
.lista-usluga li { margin-bottom: 15px; font-size: 17px; color: #2d3748; line-height: 1.8; }
.lista-usluga strong { color: #0A192F; }

/* Kontakt forma */
.kontakt-forma { max-width: 600px; margin: 40px auto 0; display: flex; flex-direction: column; gap: 20px; }
.kontakt-forma input, .kontakt-forma textarea { 
    width: 100%; 
    padding: 16px; 
    border: 1px solid #e2e8f0; 
    border-radius: 8px; 
    font-size: 16px; 
    background-color: #f8f9fa;
    transition: 0.3s;
}
.kontakt-forma input:focus, .kontakt-forma textarea:focus { 
    outline: none; 
    border-color: #0A192F; 
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(10, 25, 47, 0.1);
}

/* Footer */
.glavni-footer { background-color: #0A192F; color: #cbd5e0; text-align: center; padding: 40px 0; border-top: 4px solid #D32F2F; }

/* ========================================================= */
/* MOBILNI TELEFONI (Optimizacija)                           */
/* ========================================================= */
@media (max-width: 768px) {
    .glavni-header {
        position: sticky;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 999;
        padding: 10px 0;
    }
    .navigacija-flex { 
        /* Drži logo i hamburger meni u istoj liniji (razdvojene) */
        display: flex;
        flex-direction: row; 
        justify-content: space-between;
        align-items: center; 
        padding: 0 15px;
    }
    .logo img {
        height: 45px !important;
    }
    
    .hero { padding: 60px 15px; }
    .hero h2 { font-size: 24px; line-height: 1.3; }
    .hero p { font-size: 15px; margin-bottom: 20px; }
    
    .hero .btn-crveni {
        display: inline-block;
        position: relative;
        margin-top: 5px;
        padding: 10px 18px;
        font-size: 13px;
        max-width: 100%;
        text-align: center;
        white-space: normal;
        line-height: 1.3;
    }
    
    .sekcija { padding: 50px 15px; }
    .sekcija h2 { font-size: 26px; }
    .lista-usluga { padding: 20px; border-left: 3px solid #D32F2F; margin: 20px 10px; }
    .kontakt-forma { padding: 0 10px; }
}