/* ===================== GLOBAL RESET ===================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===================== BODY ===================== */
body {
    font-family: 'Montserrat', sans-serif;
    background-color: #1a1d2e;
    color: #a2c2f2;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* ===================== HERO (Landing page) ===================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: url("./pics/Hero pic Trčanje uz Tehnološku Podršku.png") no-repeat center center;
    background-size: cover;
    background-attachment: fixed; /* Fiksirana pozadina */
    text-align: center;
}

/* Div oko teksta */
.hero-text {
    position: relative;
    z-index: 2;
    padding: 40px;
    border-radius: 10px;
    max-width: 800px;
}

/* Overlay kvadrat iza teksta sa blur efektom */
.hero-text::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 10px;
    z-index: -1;
    transition: backdrop-filter 0.4s ease, -webkit-backdrop-filter 0.4s ease, background-color 0.4s ease;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    background-color: rgba(255,255,255,0); /* transparentno, blur će raditi */
}

.hero-text:hover::before {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    background-color: rgba(0,0,0,0.5); /* kvadrat iza teksta se zatamnjuje */
}

/* Tekst i dugme */
.hero h1,
.hero p,
.hero .btn-primary {
    color: #fff;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.cta-btn, .btn-primary {
    display: inline-block;
    padding: 15px 30px;
    background-color: #03f803;
    color: #1a1d2e;
    font-size: 1.2em;
    font-weight: bold;
    border-radius: 6px;
    text-decoration: none;
    transition: 0.3s;
}
.cta-btn:hover, .btn-primary:hover {
    background-color: #1d5f7b;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

/* Sekcija koja prelazi preko heroja */
.overlap-section {
    position: relative;
    background-color: #1a1d2e;
    margin-top: -100px; /* Preklapanje hero sekcije */
    padding: 50px 20px;
    z-index: 10;
    border-top-left-radius: 30px;
    border-top-right-radius: 30px;
    box-shadow: 0 -5px 20px rgba(0,0,0,0.5);
}

.preview {
    padding: 40px 0;
}

.preview h2 {
    text-align: center;
    color: #03f803;
    margin-bottom: 40px;
    font-size: 2.5rem;
}

.cards-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto; /* centriranje */
    padding: 20px;
}

.card {
    position: relative;
    height: 250px;
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    background-size: cover;
    background-position: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
}

/* Ikonice u gornjem levom uglu */
.card-icon {
    position: absolute;
    top: 15px;
    left: 15px;
    width: 40px;
    height: 40px;
    z-index: 2;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
    background-color: rgba(255, 255, 255, 0.4);
    padding: 5px;
    border-radius: 6px;
}

.card h2 {
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

/* Pozadine kartica */
.statistics {
    background-image: url("./pics/buttons/Statistics.png");
}

.charts {
    background-image: url("pics/buttons/Charts.png");
}

.prediction {
    background-image: url("pics/buttons/Diabetes.png");
}

.recipes {
    background-image: url("pics/buttons/Recipes.png");
}

/* Overlay da tekst ostane čitljiv */
.card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.35);
    z-index: 0;
}

/* ===================== NAVBAR ===================== */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26,29,46,0.95);
    z-index: 100;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.language-icon {
    position: absolute;
    top: 10px;
    right: 20px;
    width: 40px;
    height: auto;
    cursor: pointer;
    z-index: 101;
}

.menu {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    justify-content: center; /* Dodato za centralno poravnanje */
    margin: 0 auto; /* Osigurava centriranje */
    padding: 0; /* Uklanja default padding */
}

.menu li a {
    text-decoration: none;
    color: #a2c2f2;
    font-weight: bold;
    transition: 0.3s;
}
.menu li a:hover,
.menu li a.active {
    color: #4ecdc4;
}

/* Hamburger dugme */
.hamburger {
    display: none;
    color: #4CAF50;
    font-size: 2em;
    background: none;
    border: none;
    cursor: pointer;
    margin: 0 auto;
}

/* ===================== CTA SEKCIJA ===================== */
.cta {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(to right, #093d59, #1a1d2e);
}

.cta h2 {
    color: #03f803;
    margin-bottom: 30px;
    font-size: 2.5rem;
}

.cta a {
    display: inline-block;
    padding: 15px 40px;
    background-color: #03f803;
    color: #1a1d2e;
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.cta a:hover {
    background-color: #1d5f7b;
    color: #fff;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* ===================== FOOTER ===================== */
.footer {
    text-align: center;
    padding: 20px;
    background-color: #072a3a;
    color: #a2c2f2;
}

/* Responsive dizajn */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .cards-section {
        grid-template-columns: 1fr;
    }
    
    .hamburger {
        display: block;
    }
    
    .menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: #072a3a;
        padding: 10px 0;
        z-index: 1000;
    }
    
    .menu.open {
        display: flex;
    }
    
    .menu li a {
        display: block;
        padding: 10px 20px;
        text-align: center;
        color: #03f803;
    }
    
    .menu li a:hover {
        background-color: #1d5f7b;
        color: #fff;
    }
    
    .overlap-section {
        margin-top: -50px;
    }
}
/* ===================== DODACI ZA FUNKCIONALNOST ===================== */

/* Stil za tabelu */
#resultsTable {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: #072a3a;
    border-radius: 8px;
    overflow: hidden;
}

#resultsTable th, #resultsTable td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #1d5f7b;
}

#resultsTable th {
    background-color: #093d59;
    color: #03f803;
    font-weight: bold;
}

#resultsTable tr:hover {
    background-color: #093d59;
}

/* Stil za select za grafikone */
#chart-select {
    display: block;
    width: 100%;
    max-width: 400px;
    margin: 20px auto;
    padding: 10px 15px;
    background-color: #093d59;
    color: #a2c2f2;
    border: 2px solid #1d5f7b;
    border-radius: 5px;
    font-size: 1rem;
}

#chart-select:focus {
    outline: none;
    border-color: #03f803;
}

/* Stil za grafikone */
#chart-container {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background-color: #072a3a;
    border-radius: 8px;
}

#chart-image {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

/* Responsive tabela */
@media (max-width: 768px) {
    #resultsTable {
        display: block;
        overflow-x: auto;
    }
    
    #chart-select {
        width: 90%;
    }
}

/* Animacija za pojavljivanje navigacije */
.top-nav {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Paralaks efekat za hero sekciju */
.hero {
    transition: background-position 0.3s ease-out;
}