:root {
    --primary-green: #002f34;
    --secondary-green: #004d55;
    --accent-red: #ff002b;
    --text-dark: #222;
    --text-gray: #777;
    --text-light: #999;
    --bg-light: #f5f5f5;
    --border-color: #e0e0e0;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5;
}

.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ========== HEADER ========== */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    gap: 30px;
}

/* Logo */
.logo {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary-green);
    text-decoration: none;
    display: flex;
    align-items: center;
    letter-spacing: -1px;
}

.logo-usk {
    background: var(--primary-green);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 4px;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 5px;
    flex: 1;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    background: var(--bg-light);
}

.dropdown {
    position: relative;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-post-ad-header {
    background: var(--primary-green);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.btn-post-ad-header:hover {
    background: var(--secondary-green);
}

.btn-login, .btn-register {
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.btn-login {
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.btn-login:hover {
    background: var(--bg-light);
}

.btn-register {
    background: var(--primary-green);
    color: var(--white);
}

.btn-register:hover {
    background: var(--secondary-green);
}

/* User Menu (when logged in) */
.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-greeting {
    color: var(--text-dark);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-greeting i {
    color: var(--primary-green);
    font-size: 1.2rem;
}

.btn-admin {
    background: var(--primary-green);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-admin:hover {
    background: var(--secondary-green);
}

.btn-logout {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.btn-logout:hover {
    color: var(--primary-green);
}

/* Search Section */
.header-search {
    padding: 20px 0;
}

.header-search .container {
    display: flex;
    gap: 15px;
    align-items: center;
}

.search-box {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 15px;
    color: var(--text-light);
    font-size: 18px;
}

.search-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-green);
}

.btn-post-ad-large {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.btn-post-ad-large:hover {
    background: var(--secondary-green);
}

/* ========== MAIN CONTENT ========== */
.main-content {
    padding: 30px 15px;
    min-height: 60vh;
}

/* Ads Grid */
.ads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

/* Ad Card */
.ad-card {
    background: var(--white);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.ad-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.ad-image-wrapper {
    position: relative;
    width: 100%;
    height: 210px;
    overflow: hidden;
    background: var(--bg-light);
}

.ad-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.ad-card:hover .ad-image {
    transform: scale(1.05);
}

.ad-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 47, 52, 0.9);
    color: var(--white);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.ad-content {
    padding: 12px;
}

.ad-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 40px;
}

.ad-price {
    margin-bottom: 8px;
}

.price-current {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
}

.price-negotiable {
    font-size: 14px;
    color: var(--text-gray);
}

.ad-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-light);
}

.ad-location {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ad-location i {
    font-size: 10px;
}

.ad-time {
    font-weight: 500;
}

/* ========== FOOTER ========== */
.main-footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    margin-top: 50px;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.footer-section p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
}

.footer-section a {
    display: block;
    font-size: 13px;
    color: var(--text-gray);
    text-decoration: none;
    margin-bottom: 8px;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--primary-green);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 50%;
    color: var(--primary-green);
    font-size: 16px;
    transition: background 0.2s, color 0.2s;
}

.social-links a:hover {
    background: var(--primary-green);
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-light);
}

/* ========== KATEGORIJE SECTION ========== */
.categories-section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--primary-green);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 50px;
}

.category-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px 20px;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-green);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
}

.category-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
    line-height: 1.4;
}

/* Latest Ads Section */
.latest-ads {
    margin-top: 30px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .main-nav {
        display: none;
    }
    
    .ads-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 0;
    }
    
    .header-actions {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: 10px;
    }
    
    .btn-login {
        display: none;
    }
    
    .header-search .container {
        flex-direction: column;
    }
    
    .btn-post-ad-large {
        width: 100%;
        justify-content: center;
    }
    
    .ads-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .ad-image-wrapper {
        height: 150px;
    }
    
    .ad-title {
        font-size: 13px;
        min-height: 36px;
    }
    
    .price-current {
        font-size: 16px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 10px;
    }
    
    .category-card {
        padding: 20px 15px;
    }
    
    .category-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .category-card h3 {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .ads-grid {
        grid-template-columns: 1fr;
    }
    
    .logo {
        font-size: 24px;
    }
    
    .header-actions {
        flex-direction: column;
        gap: 8px;
    }
    
    .btn-post-ad-header, .btn-register {
        width: 100%;
        justify-content: center;
    }
    
    .user-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .user-greeting {
        justify-content: center;
    }
    
    .btn-admin {
        width: 100%;
        justify-content: center;
    }
    
    .btn-logout {
        text-align: center;
    }
    
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .category-icon {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}