/* Globalni stil */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background: #f4f4f9;
    color: #333;
    line-height: 1.6;
}

/* HEADER & NAVIGACIJA */
header {
    background: rgba(44, 62, 80, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    padding: 15px 20px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: background 0.3s ease-in-out;
}

.hamburger-menu {
    font-size: 35px;
    cursor: pointer;
    color: white;
    transition: transform 0.3s ease-in-out;
}

.hamburger-menu:hover {
    transform: scale(1.2);
}

/* NAVIGACIONI MENI */
nav ul {
    list-style: none;
    background: rgba(52, 73, 94, 0.95);
    position: absolute;
    top: 70px;
    left: -260px;
    width: 240px;
    transition: left 0.4s ease-in-out;
    padding: 15px 0;
    border-radius: 10px;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.4s ease-in-out;
}

nav ul.show {
    left: 10px;
    opacity: 1;
    transform: translateX(0);
}

nav ul li {
    text-align: center;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    font-size: 18px;
    padding: 12px 20px;
    display: block;
    transition: background 0.3s ease, transform 0.2s;
}

nav ul li a:hover {
    background: #208b8b;
    transform: scale(1.05);
}

/* WELCOME SEKCIJA */
.welcome-section {
    padding: 140px 20px;
    text-align: center;
    background: linear-gradient(135deg, #1a3d4c, #3498db);
    color: white;
    margin-bottom: 40px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    animation: fadeIn 1.5s ease-in-out;
}

.welcome-section h1 {
    font-size: 50px;
    margin-bottom: 20px;
    animation: slideDown 1.5s ease-in-out;
}

.welcome-section p {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    animation: slideUp 1.5s ease-in-out;
}
.upload-files-section {
    background-color: #eaf4fc; /* Svetloplava pozadina */
    padding: 30px 50px; /* Veći razmak unutar sekcije */
    margin: 40px auto; /* Veći razmak od drugih elemenata */
    border-radius: 12px; /* Zaobljeni uglovi */
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15); /* Blaga senka */
    max-width: 900px; /* Širina sekcije */
    border: 2px solid #007bff; /* Plavi okvir */
}

.upload-files-section h2 {
    font-size: 2em; /* Veći naslov */
    color: #0056b3; /* Tamnoplava boja */
    margin-bottom: 20px;
    text-align: center;
    font-weight: bold;
}

.upload-files-section p {
    font-size: 1.3em; /* Veći tekst */
    color: #333; /* Tamnosiva boja */
    margin-bottom: 25px;
    text-align: center;
}

.upload-files-section form {
    margin-bottom: 30px; /* Veći razmak između formi */
    text-align: center;
}

.upload-files-section label {
    display: block;
    font-size: 1.2em; /* Veći tekst za labelu */
    margin-bottom: 15px;
    color: #333;
    font-weight: bold;
}

.upload-files-section input[type="file"] {
    display: block;
    margin: 0 auto 15px auto; /* Centrirano i razmak ispod */
    font-size: 1.1em; /* Veći font */
    padding: 10px; /* Dodato unutrašnje odstojanje */
    border: 1px solid #ccc; /* Svetlosivi okvir */
    border-radius: 8px; /* Zaobljeni uglovi */
    background-color: #fff; /* Bela pozadina */
    cursor: pointer;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.upload-files-section button {
    background-color: #007bff; /* Plava boja */
    color: #fff;  /*Bela boja teksta */
    border: none;
    padding: 12px 25px; /* Veće dugme */
    font-size: 1.2em; /* Veći font */
    border-radius: 8px; /* Zaobljeni uglovi */
    cursor: not-allowed;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.upload-files-section input[type="file"]:hover:enabled {
    border-color: #007bff; /* Plavi okvir na hover */
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.5); /* Plava senka */
}

.upload-files-section button:disabled {
    background-color: #cccccc;
    color: #333;
    cursor: not-allowed;
}

.upload-files-section button:hover:disabled {
    background-color: #cccccc;
    color: #333;
}

/*.upload-files-section > button:disabled {*/
/*    background-color: #cccccc;*/
/*    cursor: not-allowed;*/
/*}*/


/* FOOTER */
footer {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    text-align: center;
    padding: 20px 0;
    width: 100%;
    box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.2);
}


/* ANIMACIJE */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

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