/* STIL ZA GLAZBENI HUB - LV2 
    Tema: Spotify / Dark Music Hub
*/

/* 1. DEFINIRANJE CSS VARIJABLI */
:root {
    --primarna-boja: #1DB954;       /* Spotify zelena */
    --sekundarna-boja: #191414;      /* Crna pozadina */
    --boja-teksta: #ffffff;
    --boja-pozadine: #121212;        /* Tamno siva pozadina */
    --siva-panel: #282828;           /* Svjetlija siva za kartice */
    --tranzicija: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-glavni: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* 2. OSNOVNI STILOVI */
body {
    font-family: var(--font-glavni);
    margin: 0;
    padding: 0;
    background-color: var(--boja-pozadine);
    color: var(--boja-teksta);
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: var(--sekundarna-boja);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 2px solid var(--primarna-boja);
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

h1, h2, h3 {
    color: var(--primarna-boja);
    margin-top: 0;
}

/* 3. INTERAKTIVNI IZBORNIK (S popravljenim "Mostom") */
nav {
    position: absolute; 
    top: 30px;
    left: 20px;
    z-index: 1000;
    /* Dodajemo malo paddinga na dno nav-a da stvorimo "most" za miša */
    padding-bottom: 20px; 
}

.menu-btn {
    display: inline-block;
    background-color: var(--primarna-boja);
    color: #000;
    padding: 10px 25px; /* Malo širi gumb */
    cursor: pointer;
    font-weight: bold;
    border-radius: 50px;
    transition: var(--tranzicija);
    text-transform: uppercase;
    font-size: 0.9rem;
}

.nav-links {
    display: none;
    list-style: none;
    padding: 10px 0;
    /* MAKNULI SMO MARGIN-TOP jer on stvara rupu koja gasi hover */
    margin: 0; 
    background-color: var(--siva-panel);
    border: 1px solid var(--primarna-boja);
    width: 220px;
    position: absolute;
    /* Postavljamo ga točno ispod gumba */
    top: 45px; 
    left: 0;
    border-radius: 8px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.6);
}

/* Kada je miš bilo gdje unutar NAV-a (na gumbu ili na izborniku), on ostaje otvoren */
nav:hover .nav-links {
    display: block;
}

.nav-links li a {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
    transition: var(--tranzicija);
}

.nav-links li a:hover {
    background-color: var(--primarna-boja);
    color: black;
    padding-left: 30px; /* Malo jači pomak na hover */
}
/* 4. GRID LAYOUT ZA INDEX */
.grid-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 5. TABLICA PJESAMA */
.table-section {
    background: var(--siva-panel);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 15px;
    border-bottom: 1px solid #3e3e3e;
    text-align: left;
}

th {
    background-color: rgba(0,0,0,0.2);
    color: var(--primarna-boja);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

tr:hover {
    background-color: rgba(255,255,255,0.05);
}

/* 6. SIDEBAR (ASIDE) */
aside {
    background: var(--siva-panel);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    height: fit-content;
}

.responsive-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    transition: var(--tranzicija);
}

.responsive-img:hover {
    transform: translateY(-5px);
}

/* 7. GRAFIKON (HISTOGRAM) */
.chart-container {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 350px;
    background: var(--siva-panel);
    padding: 50px 30px;
    border-radius: 15px;
    margin: 40px auto;
    max-width: 800px;
}

.bar {
    width: 60px;
    background: linear-gradient(to top, var(--primarna-boja), #a5f3bc);
    position: relative;
    border-radius: 8px 8px 0 0;
    /* Visina se definira u HTML-u preko style="--val: ..." */
    height: 0; 
    animation: grow 1.2s cubic-bezier(0.17, 0.67, 0.83, 0.67) forwards;
}

@keyframes grow {
    from { height: 0; }
    to { height: var(--val); }
}

.bar:hover::after {
    content: attr(data-info);
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    color: #000;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    white-space: nowrap;
}

/* 8. FOOTER */
footer {
    text-align: center;
    padding: 30px;
    background: var(--sekundarna-boja);
    margin-top: 60px;
    border-top: 1px solid #333;
    font-size: 0.9rem;
    color: #aaa;
}

/* 9. RESPONZIVNOST */
@media (max-width: 900px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    nav {
        position: static;
        margin-bottom: 20px;
        text-align: center;
    }

    .nav-links {
        left: 50%;
        transform: translateX(-50%);
    }

    /* Grafikon na mobitelu prelazi u vodoravne linije */
    .chart-container {
        flex-direction: column;
        height: auto;
        align-items: flex-start;
        padding: 30px;
    }

    .bar {
        width: 0; /* Širina raste umjesto visine */
        height: 35px;
        margin-bottom: 10px;
        border-radius: 0 8px 8px 0;
        animation: growMobile 1.2s ease-out forwards;
    }

    @keyframes growMobile {
        from { width: 0; }
        to { width: var(--val); }
    }
}