/* =========================================================
   BIBLIOTEKA.KG NAVBAR
   ВАЖНО: этот файл подключать ПОСЛЕ theme.css
   ========================================================= */

:root{
    --bt-nav-accent: #67e8f9;
    --bt-nav-dark: #1b2753;
    --bt-nav-deep: #111827;

    --bt-nav-bg: rgba(var(--nav-bg-rgb), var(--nav-bg-alpha));
    --bt-nav-text: var(--nav-link);
    --bt-nav-muted: var(--muted);
    --bt-nav-border: var(--border);

    --bt-nav-hover-bg: #1b2753;
    --bt-nav-hover-text: #ffffff;
    --bt-nav-hover-shadow:
        0 0 0 1px rgba(27, 39, 83, .22),
        0 0 16px rgba(27, 39, 83, .28),
        0 12px 28px rgba(27, 39, 83, .18);

    --bt-nav-dropdown-bg: rgba(var(--surface-rgb), .98);
    --bt-nav-dropdown-text: var(--text);
    --bt-nav-dropdown-border: var(--border);

    --bt-nav-cta-bg: var(--bt-nav-accent);
    --bt-nav-cta-text: #1b2753;
    --bt-nav-cta-hover-bg: #1b2753;
    --bt-nav-cta-hover-text: #67e8f9;

    --bt-nav-danger: #ef4444;
    --bt-nav-danger-hover: #dc2626;
}

html.theme-dark,
body.theme-dark{
    --bt-nav-bg: rgba(var(--nav-bg-rgb), var(--nav-bg-alpha));
    --bt-nav-text: #ffffff;
    --bt-nav-muted: var(--muted);
    --bt-nav-border: rgba(255, 255, 255, .14);

    --bt-nav-hover-bg: rgba(255, 255, 255, .96);
    --bt-nav-hover-text: #1b2753;
    --bt-nav-hover-shadow:
        0 0 0 1px rgba(255, 255, 255, .25),
        0 0 20px rgba(255, 255, 255, .46),
        0 0 36px rgba(103, 232, 249, .22);

    --bt-nav-dropdown-bg: rgba(var(--surface-rgb), .98);
    --bt-nav-dropdown-text: #ffffff;
    --bt-nav-dropdown-border: rgba(255, 255, 255, .14);

    --bt-nav-cta-bg: var(--bt-nav-accent);
    --bt-nav-cta-text: #1b2753;
    --bt-nav-cta-hover-bg: #ffffff;
    --bt-nav-cta-hover-text: #1b2753;
}


/* =========================================================
   HEADER / NAVBAR BASE
   ========================================================= */

.bt-site-header{
    position: relative;
    z-index: 9000;
    isolation: isolate;
}

.bt-navbar{
    min-height: 78px;
    padding-top: 10px;
    padding-bottom: 10px;
    color: var(--bt-nav-text) !important;
    background: var(--bt-nav-bg) !important;
    border-bottom: 1px solid var(--bt-nav-border) !important;
    box-shadow: var(--shadow) !important;
    backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
    z-index: 9000;
}

html.theme-dark .bt-navbar,
body.theme-dark .bt-navbar{
    background: var(--bt-nav-bg) !important;
    color: var(--bt-nav-text) !important;
}

.bt-navbar-container{
    gap: 18px;
}


/* =========================================================
   BRAND
   ========================================================= */

.bt-navbar .navbar-brand{
    margin-right: 0;
    padding-top: 0;
    padding-bottom: 0;
    text-decoration: none !important;
}

.bt-brand{
    min-width: 230px;
    text-decoration: none;
}

.bt-brand-logo{
    width: 52px;
    height: 52px;
    object-fit: contain;
    flex: 0 0 52px;
    margin-right: 12px;
}

.bt-brand-text{
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1.1;
}

.bt-brand-title{
    display: block;
    font-size: 21px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--bt-nav-text) !important;
    white-space: nowrap;
    transition:
        color .2s ease,
        text-shadow .2s ease;
}

.bt-brand-subtitle{
    display: block;
    margin-top: 4px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .01em;
    color: var(--bt-nav-muted) !important;
    white-space: nowrap;
    transition: color .2s ease;
}

.bt-navbar .navbar-brand:hover .bt-brand-title,
.bt-navbar .navbar-brand:focus .bt-brand-title{
    color: var(--accent) !important;
    text-shadow: 0 0 16px rgba(103, 232, 249, .45);
}


/* =========================================================
   BURGER
   ========================================================= */

.bt-navbar .navbar-toggler{
    width: 44px;
    height: 44px;
    padding: 0;
    color: var(--bt-nav-text) !important;
    background: transparent !important;
    border: 1px solid var(--bt-nav-border) !important;
    border-radius: 14px;
    box-shadow: none !important;
}

.bt-navbar .navbar-toggler:hover,
.bt-navbar .navbar-toggler:focus{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    border-color: transparent !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
}

.bt-navbar .navbar-toggler-icon{
    width: 1.3em;
    height: 1.3em;
    background-image: none !important;
    position: relative;
}

.bt-navbar .navbar-toggler-icon::before{
    content: "\f0c9";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 20px;
    line-height: 1.3em;
    color: currentColor;
}


/* =========================================================
   MAIN MENU
   ========================================================= */

.bt-navbar-menu{
    gap: 4px;
}

.bt-navbar-menu .nav-item{
    position: relative;
}

.bt-navbar-menu .nav-link{
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 14px !important;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    color: var(--bt-nav-text) !important;
    background: transparent !important;
    text-decoration: none !important;
    transition:
        color .2s ease,
        background-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.bt-navbar-menu .nav-link:hover,
.bt-navbar-menu .nav-link:focus,
.bt-navbar-menu .nav-item.active > .nav-link,
.bt-navbar-menu .nav-link.active,
.bt-navbar-menu .show > .nav-link,
.bt-navbar-menu .dropdown:hover > .nav-link{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateY(-1px);
}

.bt-menu-icon{
    margin-right: 7px;
    font-size: 13px;
    color: currentColor;
}

.bt-navbar-menu .dropdown-toggle::after{
    margin-left: 7px;
    vertical-align: .12em;
}


/* =========================================================
   DROPDOWN
   Исправление: убран опасный зазор между пунктом и подменю.
   Раньше из-за margin-top курсор мог выйти из hover-зоны.
   ========================================================= */

.bt-navbar .dropdown{
    position: relative;
}

.bt-navbar .dropdown::after{
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    height: 12px;
    pointer-events: auto;
}

.bt-navbar .dropdown-menu{
    min-width: 245px;
    padding: 10px;
    margin-top: 0 !important;
    border: 1px solid var(--bt-nav-dropdown-border) !important;
    border-radius: 20px;
    background: var(--bt-nav-dropdown-bg) !important;
    box-shadow: var(--shadow) !important;
    backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
    z-index: 9500 !important;
}

.bt-navbar .dropdown-item{
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 12px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--bt-nav-dropdown-text) !important;
    background: transparent !important;
    text-decoration: none !important;
    transition:
        color .2s ease,
        background-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.bt-navbar .dropdown-item:hover,
.bt-navbar .dropdown-item:focus,
.bt-navbar .dropdown-item.active{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateX(2px);
}

.bt-dropdown-icon{
    width: 18px;
    margin-right: 9px;
    font-size: 13px;
    text-align: center;
    color: currentColor;
    opacity: .9;
}

@media (min-width: 992px){
    .bt-navbar .dropdown:hover > .dropdown-menu{
        display: block;
    }

    .bt-navbar .dropdown-menu{
        top: 100%;
        animation: btDropdownFade .18s ease both;
    }
}

@keyframes btDropdownFade{
    from{
        opacity: 0;
        transform: translateY(6px);
    }

    to{
        opacity: 1;
        transform: translateY(0);
    }
}


/* =========================================================
   RIGHT ACTIONS
   ========================================================= */

.bt-navbar-actions{
    gap: 8px;
    flex-shrink: 0;
}

.bt-theme-toggle{
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-radius: 50%;
    color: var(--bt-nav-text) !important;
    background: transparent !important;
    border: 1px solid var(--bt-nav-border) !important;
    transition:
        color .2s ease,
        background-color .2s ease,
        border-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.bt-theme-toggle:hover,
.bt-theme-toggle:focus{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    border-color: transparent !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateY(-1px);
}

.bt-btn-register,
.bt-btn-login,
.bt-btn-logout{
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 16px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 800;
    white-space: nowrap;
    text-decoration: none !important;
    transition:
        color .2s ease,
        background-color .2s ease,
        border-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.bt-btn-register{
    color: var(--bt-nav-cta-text) !important;
    background: var(--bt-nav-cta-bg) !important;
    border: 1px solid var(--bt-nav-cta-bg) !important;
    box-shadow: 0 10px 24px rgba(103, 232, 249, .24);
}

.bt-btn-register:hover,
.bt-btn-register:focus{
    color: var(--bt-nav-cta-hover-text) !important;
    background: var(--bt-nav-cta-hover-bg) !important;
    border-color: var(--bt-nav-cta-hover-bg) !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateY(-1px);
}

.bt-btn-login{
    color: var(--bt-nav-text) !important;
    background: transparent !important;
    border: 1px solid var(--bt-nav-border) !important;
}

.bt-btn-login:hover,
.bt-btn-login:focus{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    border-color: transparent !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateY(-1px);
}

.bt-user-pill{
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--bt-nav-text) !important;
    background: rgba(103, 232, 249, .13) !important;
    border: 1px solid rgba(103, 232, 249, .28) !important;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none !important;
    white-space: nowrap;
    transition:
        color .2s ease,
        background-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.bt-user-pill:hover,
.bt-user-pill:focus{
    color: var(--bt-nav-hover-text) !important;
    background: var(--bt-nav-hover-bg) !important;
    box-shadow: var(--bt-nav-hover-shadow) !important;
    transform: translateY(-1px);
}

.bt-btn-logout{
    gap: 7px;
    color: #ffffff !important;
    background: var(--bt-nav-danger) !important;
    border: 1px solid var(--bt-nav-danger) !important;
}

.bt-btn-logout:hover,
.bt-btn-logout:focus{
    color: #ffffff !important;
    background: var(--bt-nav-danger-hover) !important;
    border-color: var(--bt-nav-danger-hover) !important;
    box-shadow: 0 0 18px rgba(239, 68, 68, .35);
    transform: translateY(-1px);
}

.bt-logout-form{
    margin: 0;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 1199.98px){
    .bt-brand{
        min-width: 210px;
    }

    .bt-brand-title{
        font-size: 19px;
    }

    .bt-brand-subtitle{
        font-size: 10px;
    }

    .bt-navbar-menu .nav-link{
        padding-left: 11px !important;
        padding-right: 11px !important;
        font-size: 14px;
    }

    .bt-btn-register,
    .bt-btn-login,
    .bt-btn-logout{
        padding-left: 13px;
        padding-right: 13px;
    }
}

@media (max-width: 991.98px){
    .bt-navbar{
        min-height: 72px;
    }

    .bt-navbar-container{
        gap: 10px;
    }

    .bt-navbar .navbar-collapse{
        margin-top: 14px;
        padding: 16px;
        border: 1px solid var(--bt-nav-border) !important;
        border-radius: 22px;
        background: var(--bt-nav-bg) !important;
        box-shadow: var(--shadow) !important;
        backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
        -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.08);
        z-index: 9400;
    }

    .bt-navbar-menu{
        gap: 6px;
        margin-bottom: 14px;
    }

    .bt-navbar-menu .nav-link{
        width: 100%;
        justify-content: space-between;
        border-radius: 16px;
    }

    .bt-navbar-menu .nav-link .bt-menu-icon{
        margin-right: 8px;
    }

    .bt-navbar .dropdown::after{
        display: none;
    }

    .bt-navbar .dropdown-menu{
        margin-top: 6px !important;
        margin-bottom: 8px;
        margin-left: 0;
        border-radius: 18px;
        box-shadow: none !important;
    }

    .bt-navbar-actions{
        width: 100%;
        align-items: stretch !important;
        flex-wrap: wrap;
        gap: 10px;
        padding-top: 12px;
        border-top: 1px solid var(--bt-nav-border);
    }

    .bt-theme-toggle{
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
    }

    .bt-btn-register,
    .bt-btn-login,
    .bt-btn-logout,
    .bt-user-pill{
        min-height: 44px;
    }

    .bt-btn-register,
    .bt-btn-login{
        flex: 1 1 auto;
    }

    .bt-user-pill{
        flex: 1 1 auto;
        justify-content: center;
    }
}

@media (max-width: 575.98px){
    .bt-navbar{
        min-height: 66px;
        padding-top: 8px;
        padding-bottom: 8px;
    }

    .bt-brand{
        min-width: 0;
    }

    .bt-brand-logo{
        width: 44px;
        height: 44px;
        flex-basis: 44px;
        margin-right: 10px;
    }

    .bt-brand-title{
        font-size: 17px;
    }

    .bt-brand-subtitle{
        display: none;
    }

    .bt-navbar .navbar-collapse{
        padding: 14px;
        border-radius: 18px;
    }

    .bt-navbar-actions{
        display: grid !important;
        grid-template-columns: 44px 1fr;
    }

    .bt-btn-register{
        grid-column: 2;
    }

    .bt-btn-login{
        grid-column: 1 / -1;
    }

    .bt-user-pill{
        grid-column: 2;
    }

    .bt-logout-form{
        grid-column: 1 / -1;
        width: 100%;
    }

    .bt-btn-logout{
        width: 100%;
    }
}