/*********************/
/***** VARIABLES *****/
/*********************/

:root {

    /***** COLOR *****/

    --clr-main: 18, 18, 18; /* #121212 */
    --clr-mid: 117, 117, 117; /* #757575 */
    --clr-odd: 237, 237, 237; /* #EDEDED */

    /***** FONT FAMILIES *****/

    --ff: "Open Sans", Arial, Helvetica, sans-serif;

    /***** SIZES *****/

    --fs-body: 1rem;    /* body */   /* FONTS */
    --fs-h1: 1.4rem;    /* h1 */

    --fs-nav: 1.4rem;  /* navigation */
    --fs-subnav: 1rem; 

    --fs-content-big: 1.3rem; /* landing page */
    --fs-content-mid: 1.1rem;
    --fs-content-small: 0.9rem;
    --fs-content-tiny: 0.6rem;

    --pad-main: 0.5em;              /* BODY MAIN ... */

    --con-width: 90%;               /* CONTAINER */

    --logo: 2.5rem;                 /* LOGO */
    --ft-icon: 15px;

    --menu-btn: 1rem;               /* BUTTONS*/
    --switch-btn: 25px;

    /***** LETTER SPACING *****/

    --spacing-h1: 1px;
    --spacing-nav: 8px;
    --spacing-subnav: 4px;
}


@media (min-width: 500px) {

    :root {
        --fs-h1: 1.75rem;

        --logo: 3rem;

        --menu-btn: 1.1rem;

        --spacing-h1: 2px;
    }
}

@media (min-width: 768px) {

    :root {
        --fs-h1: 2rem;

        --pad-main: 1em;

        --con-width: 95%;

        --logo: 3.5rem;

        --menu-btn: 1.2rem;

        --spacing-h1: 4px;
    }

}

@media (min-width: 1024px) {

    :root {
        --fs-h1: 2.25rem;

        --logo: 4rem;

        --menu-btn: 1.4rem;

        --switch-btn: 22px;

        --spacing-h1: 6px;
    }

}

/*****************/
/***** RESET *****/
/*****************/

*,
*::before,
*::after {
    box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, p, figure {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
}

input, button, textarea, select {
    font-family: inherit;
    background-color: inherit;
    color: inherit;
}

img, picture {
    display: block;
    max-width: 100%;
    filter: grayscale(100%);
}

@media (prefers-reduced-motion: reduce) {  
    *,
    *::before,
    *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
}
}

button {
    padding: 0; 
    border: none;
    cursor: pointer;
}

/***************************/
/***** UTILITY CLASSES *****/
/***************************/

.grid {
    display: grid;
}

.flex {
    display: flex;
}

.nospace {
    letter-spacing: 0px; 
}

.not-visible {
    display: none;
}

.text-center {
    text-align: center;
}

.uppercase {
    text-transform: uppercase;
}

.no-transform {
    text-transform: none;
}

.current {
    border-bottom: 1px solid rgba(var(--clr-mid), 1);
}

.filter-flip {
    filter: invert(100%);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/**********************/
/***** COMPONENTS *****/
/**********************/

.container {
    max-inline-size: var(--con-width);
    margin-inline: auto;
}

.size-big-light {
    color: rgba(var(--clr-odd), 1); 
    font-size: var(--fs-content-big);
}

.size-mid-light {
    color: rgba(var(--clr-odd), 1); 
    font-size: var(--fs-content-mid);
}

.size-small-light {
    color: rgba(var(--clr-odd), 1);   
    font-size: var(--fs-content-small);
}

.size-tiny-light {
    color: rgba(var(--clr-odd), 1);   
    font-size: var(--fs-content-tiny);
}

.size-big-gray {
    color: rgba(var(--clr-odd), 0.7); 
    font-size: var(--fs-content-big);
}

.size-mid-gray {
    color: rgba(var(--clr-odd), 0.7); 
    font-size: var(--fs-content-mid);
}

.size-small-gray {
    color: rgba(var(--clr-odd), 0.7);   
    font-size: var(--fs-content-small);
}

.size-tiny-gray {
    color: rgba(var(--clr-odd), 0.7);   
    font-size: var(--fs-content-tiny);
}

.line-height-mid {
    line-height: 1.7;
}

.separator-line {
    height: 1px;
    width: 100%;
    border-bottom: 1px solid rgba(var(--clr-mid), 1);
}

.main-img-container {
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
}

/**************************/
/***** GENERAL STYLES *****/
/**************************/

body {
    z-index: 0;
    background-color: rgba(var(--clr-main), 1);
    color: rgba(var(--clr-odd), 1);
    font-family: var(--ff); 
    font-size: var(--fs-body);
    padding-block: var(--pad-main);
}

header, main { 
    border-block-end: 1px solid rgba(var(--clr-mid));
}

header {
    padding-block-end: var(--pad-main);
}

main {
    padding-block: var(--pad-main);
}

footer {
    padding-block-start: var(--pad-main);
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

li a,
.footer-text-link,
.cc-link {
    max-width: 100%;
    display: inline-block;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
}

/******************/
/***** HEADER *****/
/******************/

.header-banner {
    align-items: center;
    border: 1px solid red;
}

.header-title {
    font-size: var(--fs-h1);
    letter-spacing: var(--spacing-h1);
}

.logo-link {
    order: -1;
    width: var(--logo);
    background-color: rgba(var(--clr-odd), 1);
    border-radius: 50%;
    margin-inline-end: 0.5em;
}

.logo-img {
    transition: transform 0.25s;
}

.logo-img:hover {
    transform: scale(75%);
}

/***************/
/***** NAV *****/
/***************/

.header-menu-btn {  
    width: var(--menu-btn);
    aspect-ratio: 1;
    border: none;
    border-radius: 50%;
    margin-inline-start: auto;
    cursor: pointer;
}

.header-nav {
    position: fixed;
    z-index: 1;
    top: 0;
    right: 0;
    bottom: 0;
    left: 100%;
    width: 100%; /* ovo je za sigurnost zbog pomicanja menu-a*/
    overflow: scroll;
    grid-template: 3em 1fr 1em / 1fr 1fr 1fr 1fr;  
    grid-template-areas: 
        "nav-btns nav-btns . x-btn"
        ". nav-menu nav-menu ."
        ". . . .";
    background: rgba(var(--clr-mid), 1);
    border: 3px solid rgba(var(--clr-odd), 1);
    box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.5) inset;
    transition: opacity 0.25s, transform 0.5s;
}

@media (min-width: 600px) {
    .header-nav {
        width: 35%;
    }
}

@media (min-width: 800px) {
    .header-nav {
        width: 30%;
    }
}

@media (min-width: 1024px) {
    .header-nav {
        width: 25%;
    }
}

.nav-ctrl-btns {
    grid-area: nav-btns;
    justify-content: start;
}

.header-close-btn {
    grid-area: x-btn;
    justify-self: end;
    align-self: center;
    margin-inline-end: 1em;
}

.header-nav-list {
    height: 100%;  /* ovo je da se rasporedi navigacijska lista na cijeli nav bar */
    grid-area: nav-menu;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: var(--fs-nav);
    font-weight: 700;
    letter-spacing: var(--spacing-nav);
}

.header-nav-item {
    text-align: center;
}

.header-nav-link {
    color: rgba(var(--clr-main), 1);
    transition: color 0.25s;
}

.header-nav-link:hover,
.header-nav-link:focus-visible {
    color: rgba(var(--clr-light), 1);
}

.empty {
    height: 50px;
}

.header-subnav-list {
    height: 50px;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    font-size: var(--fs-subnav);
    letter-spacing: var(--spacing-subnav);
    transition: height 0.25s;
}

.subnav-info-expanded {
    height: 250px; /* For each added element height needs to grow 50px */
    transition: height 0.25s;
}

.subnav-sfx-expanded {
    height: 150px; /* For each added element height needs to grow 50px */
    transition: height 0.25s;
}

.nav-switch {
    width: var(--switch-btn);  
    margin-inline: 1em; 
    cursor: pointer;
}

.sound-off {
    opacity: 0.3;
}

.nav-enter {
    transform: translateX(-100%);   
}

.header-subnav-link {
    color: rgba(var(--clr-main), 0.7);
    transition: color 0.25s;
}

.header-subnav-link:hover,
.header-subnav-link:focus-visible {
    color: rgba(var(--clr-odd), 1);
}

/*****************/
/***** ABOUT *****/
/*****************/

.about-grid {
    height: 200px;
    border: 1px solid blue;
}

/******************/
/***** FOOTER *****/
/******************/

.footer-grid{

    grid-template-rows: auto auto auto;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: 
    "work social"
    "info social"
    "attr attr";
    align-items: center;
}

.footer-work-list {
    grid-area: work;
    margin-block-end: 0.5em;
}

.footer-info-list {
    grid-area: info;
}

.footer-work-list li,
.footer-info-list li {
    margin-inline-end: 1em;
}

.footer-social-list {
    grid-area: social;
    justify-self: end;
}

.footer-social-item {
    width: var(--ft-icon);
    height: var(--ft-icon);
    margin-block: auto;
    margin-inline-start: 0.5em;
}

.footer-attributions {
    grid-area: attr;
    text-align: center;
    line-height: 1.8;
    padding-block-start: var(--pad-main);
    border-top: 1px solid rgba(var(--clr-mid), 1);
    margin-block-start: 1em;
}

.cc-link:hover,
.cc-link:focus-visible {
    text-decoration: underline;
}

.cc-image {
    display: inline-block;
    max-height: 100%;
    width: 10px;
}