/* --- MODERNE VARIJABLE --- */
:root {
    --crna-podloga: #080808;
    --kartica-bg: #111111;
    --akcent-boja: #ffffff;
    --tekst-muted: #a0a0a0;
    --border-soft: rgba(255, 255, 255, 0.1);
    --sjena: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

body {
    background-color: var(--crna-podloga);
    color: var(--akcent-boja);
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- NAVIGACIJA (Ultra Minimal) --- */
header {
    background-color: rgba(8, 8, 8, 0.9);
    backdrop-filter: blur(15px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-soft);
    padding: 1.5rem 0;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-button {
    text-decoration: none;
    color: var(--tekst-muted);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
}

.nav-button:hover {
    color: var(--akcent-boja);
}

.nav-button.active {
    color: var(--akcent-boja);
    border-bottom: 2px solid var(--akcent-boja);
}

/* --- MAIN LAYOUT --- */
.page-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 80px 5%;
    text-align: center;
}

.main-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1;
    margin-bottom: 1.5rem;
}

.intro-text {
    font-size: 1.25rem;
    color: var(--tekst-muted);
    max-width: 700px;
    margin: 0 auto 4rem;
    font-weight: 300;
}

/* --- GRID SEKCIJE --- */
.content-section {
    margin-bottom: 100px;
}

.section-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--tekst-muted);
    margin-bottom: 3rem;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    align-items: stretch;
}

/* --- MODERNE KARTICE --- */
.card {
    background-color: var(--kartica-bg);
    border: 1px solid var(--border-soft);
    border-radius: 0px; /* Oštri rubovi daju luksuzniji vibe autima */
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
    text-align: left;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: var(--sjena);
}

.card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    filter: grayscale(40%) contrast(1.1);
    transition: all 0.5s ease;
}

.card:hover .card-image {
    filter: grayscale(0%) contrast(1);
    transform: scale(1.05);
}

.card h3 {
    padding: 25px 25px 5px;
    font-size: 1.5rem;
    font-weight: 700;
}

.card p {
    padding: 0 25px 30px;
    color: var(--tekst-muted);
    font-size: 0.95rem;
}

/* --- LISTA PREDNOSTI (Clean Grid) --- */
.why-us-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.why-us-list li {
    padding: 40px;
    background: linear-gradient(145deg, #111, #080808);
    border: 1px solid var(--border-soft);
}

.why-us-list p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* --- CALL TO ACTION (Premium Gumb) --- */
.call-to-action-button {
    display: inline-block;
    margin-top: 4rem;
    background-color: var(--akcent-boja);
    color: #000;
    padding: 20px 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.call-to-action-button:hover {
    background-color: transparent;
    color: var(--akcent-boja);
    outline: 2px solid var(--akcent-boja);
    transform: scale(1.02);
}

/* --- MOBILNA OPTIMIZACIJA --- */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.8rem;
    }
    
    nav {
        gap: 1rem;
        padding: 0 10px;
    }

    .nav-button {
        font-size: 0.7rem;
    }

    .card-container {
        grid-template-columns: 1fr;
    }
}