/* ============ navbar ============ */
.site-header .navbar {
  position: fixed;
    background-color: var(--white);          /* white in every state */
    padding-block: .5rem;
    z-index: 1030;
    width: 100%;
    top: 0;
}
.site-header .navbar.is-sticky {
    position: fixed;
    top: 0;
    inset-inline: 0;
    border-bottom: var(--border);
    box-shadow: 0 .5rem 1.5rem rgba(2, 54, 90, .08);
    animation: navSlideDown .5s ease both;
}
@keyframes navSlideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0);     opacity: 1; }
}
.custom-navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}
.navbar-brand {
    margin: 0;
}
.logo {
    height: 60px;
    transition: height .3s ease;
}
.is-sticky .logo {
    height: 48px;                            /* logo shrinks a little after scroll */
}

/* links */
.nav-link {
    position: relative;
    font-size: 1rem;
    color: var(--main);
    text-decoration: none;
    transition: color .3s ease, background-color .3s ease;
}
.nav-link::before {                           /* underline (::before, so the caret ::after is untouched) */
    content: "";
    position: absolute;
    bottom: 4px;
    inset-inline-start: .5rem;
    width: 0;
    height: 2px;
    background-color: var(--second);
    transition: width .3s ease;
}
.nav-link:hover,
.nav-link.active,
.nav-link.show {
    color: var(--second);
}
.nav-link:hover::before,
.nav-link.active::before {
    width: calc(100% - 1rem);
}
.dropdown-toggle::after {
    font-family: "Font Awesome 6 Free";
    content: "\f107" !important;
    font-weight: 900;
    border: 0 !important;
    vertical-align: 0;
    display: inline-block;
    transition: transform .3s ease;
}
.nav-link.dropdown-toggle.show::after {
    transform: rotate(180deg);
}

/* actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.contact-btn {
    font-size: 1.1rem;
    padding: .5rem 1.3rem;
    background-color: var(--main);
    color: var(--white);
    border-radius: .6rem;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all .3s ease;
    border: 1px solid var(--white);
    box-shadow: 0 4px 4px 0 #ffffff40 inset, 0 -4px 4px 0 #ffffff40 inset;
}
.contact-btn.mybtn-white {
    background-color: var(--white);
    color: var(--main);
    border: 1px solid var(--second);
    box-shadow: none;
}

/* ============ dropdown card (desktop) ============ */
.navbar .dropdown-menu {
    min-width: 16rem;
    margin-top: 0;
    padding: .75rem;
    border: 0;
    border-radius: 2rem;
    box-shadow: 0 .75rem 2.5rem rgba(2, 54, 90, .15);
    animation: dropFade .25s ease both;
}
@keyframes dropFade {
    from { opacity: 0; transform: translateY(.5rem); }
    to   { opacity: 1; transform: translateY(0); }
}
.navbar .dropdown-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .9rem 1.1rem;
    border-radius: 1.4rem;
    color: var(--main);
    font-size: 1.1rem;
    white-space: normal;
    transition: background-color .3s ease;
}
.navbar .dropdown-item i {
    width: 1.4rem;
    text-align: center;
    color: var(--second);
    font-size: 1.15rem;
}
.navbar .dropdown-item:hover,
.navbar .dropdown-item:focus,
.navbar .dropdown-item.active {
    background-color: var(--bg);
    color: var(--main);
}

/* open on hover (desktop only) */
@media (min-width: 992px) {
    .navbar .dropdown:hover > .dropdown-menu {
        display: block;
    }
}

/* ============ language dropdown ============ */
.lang-dropdown {
    position: relative;
}
.lang-toggle-btn {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .45rem .9rem;
    border: 1px solid var(--bg);
    border-radius: 2rem;
    background-color: var(--bg);
    color: var(--main);
    font-size: 1rem;
    cursor: pointer;
    transition: all .3s ease;
}
.lang-toggle-btn:hover,
.lang-toggle-btn.show {
    border-color: var(--second);
}
.lang-toggle-btn i:first-child {
    color: var(--second);
}
.lang-caret {
    font-size: .7rem;
    transition: transform .3s ease;
}
.lang-toggle-btn.show .lang-caret {
    transform: rotate(180deg);
}
.navbar .lang-menu[data-bs-popper] {
    left: auto;
    right: auto;
    inset-inline-end: 0;                      /* aligned to the end, works in LTR and RTL */
    top: 100%;
    min-width: 13rem;
}
.lang-item {
    padding: .7rem 1rem;
    font-size: 1rem;
}
.lang-code {
    min-width: 2.4rem;
    padding: .15rem .5rem;
    border-radius: .5rem;
    background-color: var(--bg);
    color: var(--second);
    font-size: .8rem;
    font-weight: 600;
    text-align: center;
}
.lang-item:hover .lang-code,
.lang-item.active .lang-code {
    background-color: var(--white);
}
.navbar .lang-item .lang-check {
    margin-inline-start: auto;
    width: auto;
    font-size: .8rem;
}
.lang-item:not(.active) .lang-check {
    display: none;
}

/* ============ animated toggler ============ */
.navbar-toggler {
    position: relative;
    width: 3rem;
    height: 3rem;
    margin-inline-start: auto;                /* far end, opposite the logo */
    padding: 0;
    border: 1px solid var(--bg);
    border-radius: 1rem;
    background-color: var(--bg);
    box-shadow: none !important;
    transition: background-color .35s ease, border-color .35s ease,
                border-radius .35s ease, transform .5s cubic-bezier(.68, -.55, .27, 1.55);
}
.navbar-toggler:focus-visible {
    box-shadow: 0 0 0 .2rem rgba(48, 139, 210, .35) !important;
}
.navbar-toggler .toggler-bar {
    position: absolute;
    top: 50%;
    inset-inline-start: 50%;
    width: 1.3rem;
    height: 2px;
    margin-top: -1px;
    margin-inline-start: -.65rem;
    border-radius: 2px;
    background-color: var(--main);
    transition: transform .45s cubic-bezier(.68, -.55, .27, 1.55), opacity .25s ease, background-color .3s ease;
}
/* closed: three bars with different lengths */
.navbar-toggler .toggler-bar:nth-child(1) { transform: translateY(-.42rem); }
.navbar-toggler .toggler-bar:nth-child(2) { transform: scaleX(.65); }
.navbar-toggler .toggler-bar:nth-child(3) { transform: translateY(.42rem) scaleX(.85); }

/* hover: bars become the same length */
.navbar-toggler.collapsed:hover .toggler-bar:nth-child(2),
.navbar-toggler.collapsed:hover .toggler-bar:nth-child(3) {
    transform: translateY(var(--y, 0)) scaleX(1);
}
.navbar-toggler.collapsed:hover .toggler-bar:nth-child(3) { --y: .42rem; }

/* open: dark circle, spins, bars become a cross */
.navbar-toggler:not(.collapsed) {
    background-color: var(--main);
    border-color: var(--main);
    border-radius: 50%;
    transform: rotate(90deg);
    box-shadow: 0 0 0 .4rem rgba(48, 139, 210, .18) !important;
}
.navbar-toggler:not(.collapsed) .toggler-bar {
    background-color: var(--white);
}
.navbar-toggler:not(.collapsed) .toggler-bar:nth-child(1) { transform: rotate(45deg); }
.navbar-toggler:not(.collapsed) .toggler-bar:nth-child(2) { transform: scaleX(0); opacity: 0; }
.navbar-toggler:not(.collapsed) .toggler-bar:nth-child(3) { transform: rotate(-45deg); }

/* ============ tablets and phones ============ */
@media (max-width: 991.98px) {
    .logo { height: 50px; }
    .is-sticky .logo { height: 42px; }

    .navbar-collapse {
        width: 100%;
        flex-basis: 100%;
        margin-top: .75rem;
        padding-top: .75rem;
        border-top: 1px solid var(--border-color);
    }
    .navbar-collapse.show {
        max-height: calc(100vh - 6rem);
        overflow-y: auto;
    }

    /* links: full-width rows, active = soft pill (no full-width underline) */
    .nav-links {
        gap: .25rem;
        margin-block: 0 1rem;
        width: 100%;
    }
    .nav-links .nav-item {
        padding-inline: 0 !important;         /* removes px-2 */
    }
    .nav-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: .8rem 1rem;
        border-radius: 1rem;
        font-size: 1.1rem;
    }
    .nav-link::before {
        display: none;
    }
    .nav-link:hover {
        background-color: rgba(230, 245, 255, .6);
    }
    .nav-link.active,
    .nav-link.show {
        background-color: var(--bg);
        color: var(--main);
        font-weight: 600;
    }

    /* dropdown inside the menu: indented list with a guide line */
    .navbar .dropdown-menu {
        position: static;
        min-width: 0;
        margin: .25rem 0 .5rem;
        margin-inline-start: 1.5rem;
        padding: .25rem 0;
        border: 0;
        border-inline-start: 2px solid rgba(48, 139, 210, .35);
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }
    .navbar .dropdown-item {
        margin-inline-start: .5rem;
        padding: .65rem .9rem;
        font-size: 1rem;
        gap: .8rem;
    }
    .navbar .dropdown-item i {
        display: grid;
        place-items: center;
        width: 2rem;
        height: 2rem;
        border-radius: 50%;
        background-color: var(--bg);
        font-size: .9rem;
    }
    .navbar .dropdown-item:hover i,
    .navbar .dropdown-item.active i {
        background-color: var(--white);
    }

    /* actions: stacked, full width */
    .nav-actions {
        flex-direction: column;
        align-items: stretch;
        gap: .75rem;
        width: 100%;
        margin-bottom: 1rem;
    }
    .lang-dropdown,
    .lang-toggle-btn {
        width: 100%;
    }
    .lang-toggle-btn {
        justify-content: space-between;
        padding: .75rem 1rem;
        border-radius: 1rem;
    }
    .lang-toggle-btn span {
        margin-inline-end: auto;
        margin-inline-start: .25rem;
    }
    .navbar .lang-menu[data-bs-popper] {
        position: static;
        width: 100%;
        margin: .5rem 0 0;
        padding: .5rem;
        border: 0;
        border-radius: 1.5rem;
        background-color: var(--bg);
    }
    .navbar .lang-item i.lang-check {
        display: inline-block;
        width: auto;
        height: auto;
        background: none;
    }
    .lang-item:not(.active) .lang-check {
        display: none !important;
    }
    .lang-item:hover {
        background-color: var(--white);
    }
    .contact-btn {
        width: 100%;
        padding: .8rem 1.3rem;
        border-radius: 1rem;
    }

    /* items slide in one by one when the menu opens */
    .navbar-collapse.show .nav-links > .nav-item,
    .navbar-collapse.show .nav-actions > * {
        animation: itemIn .45s ease both;
    }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(1) { animation-delay: .05s; }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(2) { animation-delay: .10s; }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(3) { animation-delay: .15s; }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(4) { animation-delay: .20s; }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(5) { animation-delay: .25s; }
    .navbar-collapse.show .nav-links > .nav-item:nth-child(6) { animation-delay: .30s; }
    .navbar-collapse.show .nav-actions > *:nth-child(1) { animation-delay: .35s; }
    .navbar-collapse.show .nav-actions > *:nth-child(2) { animation-delay: .40s; }
}
@keyframes itemIn {
    from { opacity: 0; transform: translateY(.75rem); }
    to   { opacity: 1; transform: translateY(0); }
}

/* long words (German, Russian) between 992px and 1199px */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .nav-links .nav-item { padding-inline: .15rem !important; }
    .nav-link            { font-size: .92rem; }
    .contact-btn         { font-size: .95rem; padding-inline: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    .navbar *,
    .navbar-collapse * {
        animation: none !important;
        transition: none !important;
    }
}