#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 2;
    display: flex;
    overflow: hidden;
    background: var(--bg-primary);
    box-shadow: 0 -1.5rem 1.8rem 2.5rem var(--shadow);
    transition: height 0.5s;
}

#header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

#header-main {
    position: relative;
    display: none;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 0;
    padding-bottom: 0;
    overflow: hidden;
}

#header.nav-active #header-content {
    height: 100dvh;
}

#header.nav-active #header-main {
    display: flex;
    flex-grow: 1;
    overflow-y: auto;
}

#header-top {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 1rem;
}

#header-nav-toggle,
#header-nav-toggle-balance {
    position: relative;
    overflow: visible;
    width: 1.8rem;
    height: 1.8rem;
    padding: 0;
}

#header-title-btn {
    color: var(--text-primary);
    background: var(--shadow);
    border-radius: var(--default-border-radius);
    font-size: 1.5rem;
    outline-offset: -0.2rem;
}

#header-title-btn>h1 {
    font-size: 100%;
    padding: 0;
}

#header-title-btn>h1:last-child {
    font-size: 62%;
}

#header-nav-toggle {
    outline-offset: 0.3rem;
}

#header-nav-toggle>span {
    position: absolute;
    left: 50%;
    width: 100%;
    height: 15%;
    background: var(--bg-primary);
    border-radius: 0.3rem;
    transition: transform 0.25s, top 0.25s;
}

#header-nav-toggle>span:nth-child(1) {
    top: 0;
    transform: translateX(-50%);
}

#header-nav-toggle>span:nth-child(2) {
    top: 50%;
    transform: translate(-50%, -50%);
}

#header-nav-toggle>span:nth-child(3) {
    top: 85%;
    transform: translateX(-50%);
}

#header.nav-active:not(.nav-end) #header-nav-toggle>span:nth-child(1) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}

#header.nav-active:not(.nav-end) #header-nav-toggle>span:nth-child(2) {
    transform: translate(-250%, -50%);
}

#header.nav-active:not(.nav-end) #header-nav-toggle>span:nth-child(3) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
}

#header-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    overflow: visible;
    padding-top: 0.3rem;
}

#header-nav a,
.header-nav-group-btn {
    padding-left: 0.65rem;
    margin-left: 0.65rem;
    font-size: 1.75rem;
    text-align: left;
    white-space: nowrap;
}

#header-nav a:hover {
    text-decoration: underline;
}

.header-nav-group,
.header-nav-group-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    overflow: visible;
}

.header-nav-group-btn {
    display: none;
}

#header-language-toggle {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    padding: 1rem 1.25rem;
}

.language-btn {
    display: flex;
    padding: 0;
    overflow: hidden;
    border: 0.15rem solid transparent;
    border-radius: var(--small-border-radius);
    z-index: 2;
    transition: border-color 0.2s;
}

.language-btn:first-child {
    margin-bottom: 0.65rem;
}

.language-btn.active {
    border-color: var(--secondary);
}

.language-btn:hover {
    border-color: var(--accent);
}

#header-icon-links {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding: 0.65rem 0 1.25rem;
    overflow: visible;
}

#header-icon-links a {
    font-size: 2rem;
    padding: 0;
    transition: color 0.2s;;
}

#header-icon-links a:first-child {
    margin-right: 3rem;
}

#header-icon-links a:hover {
    color: var(--hover-color);
}