/**
 * Veřejný horní navbar — typografie a mezery jako v adminu (.admin-btn / .admin-topbar__nav).
 * Barvy z webu: --main, --secondary, --background (definované v page CSS).
 */

:root {
    /* Výška baru včetně loga + nápisu (sjednoceno s top draweru / backdropu). */
    --site-header-bar-h: 4.125rem;
    /* Nad obsahem stránek i nad staršími popup pravidly (např. home.css .popup 99999) */
    --site-header-z: 120000;
    --site-nav-drawer-radius: 1.15rem;
    --site-nav-ease: cubic-bezier(0.33, 1, 0.68, 1);
    /* Vodorovný odstup od krajů viewportu — na úzkých displejích víc „dýchá“ */
    --site-header-pad-x: clamp(1.35rem, 5vw, 2.75rem);
}

/* Fixní header nepřidává výšku v toku dokumentu — odsadíme celý obsah stránky. */
html {
    scroll-padding-top: var(--site-header-bar-h);
}

body {
    padding-top: var(--site-header-bar-h);
}

body.site-nav-no-scroll {
    overflow: hidden;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--site-header-z);
    font-family: 'Poppins', system-ui, sans-serif;
}

.site-header__bar {
    position: relative;
    /* Nad .site-header__backdrop — jinak má bar kvůli backdrop-filter vlastní vrstvy a drawer je pod overlayem */
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: var(--site-header-bar-h);
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid rgba(53, 50, 97, 0.1);
    box-shadow:
        0 1px 2px rgba(53, 50, 97, 0.04),
        0 4px 24px rgba(53, 50, 97, 0.06);
    /*
     * backdrop-filter na tomto prvku dělá z baru containing block pro position:fixed potomky
     * (např. mobilní #site-header-nav) → drawer se „vejde“ jen do výšky baru a není vidět.
     * Rozostření je na ::before, samotný bar už filter nemá.
     */
    isolation: isolate;
}

.site-header__bar::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: none;
}

.site-header__bar-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-block: 0.35rem;
    padding-inline: var(--site-header-pad-x);
    box-sizing: border-box;
    min-height: var(--site-header-bar-h);
}

/* Logo + „JAN RUNŠTUK“ — stejný charakter jako .uvodni-text .left h3 na úvodní stránce (Mulish), zmenšené do baru */
.site-header__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    gap: clamp(0.4rem, 1.1vh, 0.65rem);
    line-height: 1;
    text-decoration: none;
    color: inherit;
}

.site-header__brand-img {
    height: 28px;
    width: auto;
    max-width: 86px;
    object-fit: contain;
    display: block;
}

.site-header__brand-name {
    font-family: 'Mulish', sans-serif;
    font-weight: 900;
    font-style: italic;
    color: var(--main, #353261);
    font-size: clamp(0.5rem, 1.35vw, 0.625rem);
    letter-spacing: 0.12em;
    text-align: center;
    white-space: nowrap;
    margin: 0;
    padding: 0;
    line-height: 1.05;
}

.site-header__brand:hover {
    opacity: 0.92;
}

.site-header__brand:hover .site-header__brand-name {
    color: var(--main, #353261);
}

.site-header__nav {
    margin: 0;
}

.site-header__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header__item {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Odkazy / tlačítka — jako admin-btn */
.site-header__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    font-size: var(--jr-fs-lead);
    font-weight: 500;
    line-height: 1.2;
    text-decoration: none;
    color: var(--main, #353261);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    box-sizing: border-box;
    transition:
        background-color 0.15s ease,
        border-color 0.15s ease,
        color 0.15s ease;
}

.site-header__link:hover {
    background: rgba(53, 50, 97, 0.06);
    color: var(--main, #353261);
}

.site-header__link.is-active:hover:not(.site-header__link--cta) {
    background: transparent;
    color: var(--secondary, #0197d5);
}

.site-header__item.active-link > a.site-header__link:not(.site-header__link--cta):hover {
    background: transparent;
    color: var(--secondary, #0197d5);
}

.site-header__item.active-link > details > summary.site-header__link:hover {
    background: transparent;
    color: var(--secondary, #0197d5);
}

.site-header__link:focus-visible {
    outline: 2px solid var(--secondary, #0197d5);
    outline-offset: 2px;
}

/* Jako .landing-hero__btn--ghost na úvodní stránce */
.site-header__link--cta {
    padding: 0.65rem 1.35rem;
    font-weight: 700;
    border-radius: 6px;
    border-width: 2px;
    border-style: solid;
    border-color: rgba(53, 50, 97, 0.35);
    background: transparent;
    color: var(--main, #353261) !important;
    transition:
        background 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.site-header__link--cta:hover {
    background: rgba(53, 50, 97, 0.06);
    border-color: var(--main, #353261);
    color: var(--main, #353261) !important;
    filter: none;
}

.site-header__link--cta.is-active:hover {
    background: rgba(53, 50, 97, 0.06);
    border-color: var(--main, #353261);
    color: var(--main, #353261) !important;
    filter: none;
}

.site-header__item.active-link > .site-header__link:not(.site-header__link--cta),
.site-header__item.active-link > details > summary.site-header__link,
.site-header__link.is-active:not(.site-header__link--cta) {
    background: transparent;
    color: var(--secondary, #0197d5);
    border-color: transparent;
}

.site-header__item.active-link > details > summary.site-header__link .site-header__chev {
    color: var(--secondary, #0197d5);
    opacity: 1;
}

.site-header__link--cta.is-active {
    background: transparent;
    border-color: rgba(53, 50, 97, 0.35);
    color: var(--main, #353261) !important;
    box-shadow: none;
    filter: none;
}

/* Doprava — details */
.site-header__details {
    position: relative;
}

.site-header__details > summary.site-header__link {
    list-style: none;
}

.site-header__details > summary.site-header__link::-webkit-details-marker {
    display: none;
}

.site-header__chev {
    font-size: 0.65em;
    opacity: 0.75;
    transition: transform 0.2s ease;
}

.site-header__details[open] .site-header__chev {
    transform: rotate(180deg);
}

.site-header__sub {
    position: absolute;
    top: calc(100% + 0.35rem);
    left: 0;
    min-width: 13rem;
    margin: 0;
    padding: 0.4rem 0;
    list-style: none;
    background: #fff;
    border: 1px solid rgba(53, 50, 97, 0.12);
    border-radius: 10px;
    box-shadow: 0 12px 40px rgba(53, 50, 97, 0.12);
    z-index: 2;
}

.site-header__sub li {
    margin: 0;
}

.site-header__sub a {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--main, #353261);
    text-decoration: none;
    transition: background 0.15s ease;
}

.site-header__sub a:hover {
    background: rgba(53, 50, 97, 0.06);
}

.site-header__sub a.is-active:hover {
    background: transparent;
    color: var(--secondary, #0197d5);
}

.site-header__sub a:focus-visible {
    outline: 2px solid var(--secondary, #0197d5);
    outline-offset: -2px;
}

.site-header__item.active-link .site-header__sub a.is-active {
    background: transparent;
    color: var(--secondary, #0197d5);
}

/* Desktop: stejná velikost písma jako u odstavců (var(--jr-fs-prose) v typography-base) */
@media (min-width: 900px) {
    .site-header__link {
        font-size: var(--jr-fs-prose);
        line-height: var(--jr-lh-snug);
    }

    .site-header__sub a {
        font-size: var(--jr-fs-prose);
        line-height: var(--jr-lh-snug);
    }
}

/* Hamburger — vlastní ikona (ne obdélníkové „default“ tlačítko) */
.site-header__burger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.875rem;
    height: 2.875rem;
    padding: 0;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    flex-shrink: 0;
    background: linear-gradient(
        145deg,
        rgba(53, 50, 97, 0.1) 0%,
        rgba(1, 151, 213, 0.12) 100%
    );
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.85) inset,
        0 4px 14px rgba(53, 50, 97, 0.12);
    transition:
        box-shadow 0.25s var(--site-nav-ease),
        transform 0.2s ease,
        background 0.25s ease;
}

.site-header__burger:hover {
    background: linear-gradient(
        145deg,
        rgba(53, 50, 97, 0.14) 0%,
        rgba(1, 151, 213, 0.18) 100%
    );
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.9) inset,
        0 6px 20px rgba(53, 50, 97, 0.16);
}

.site-header__burger:active {
    transform: scale(0.96);
}

.site-header__burger:focus-visible {
    outline: 2px solid var(--secondary, #0197d5);
    outline-offset: 3px;
}

.site-header__burger-box {
    position: relative;
    display: block;
    width: 1.375rem;
    height: 1.0625rem;
}

.site-header__burger-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(
        90deg,
        var(--main, #353261) 0%,
        var(--secondary, #0197d5) 100%
    );
    transform-origin: center;
    transition:
        transform 0.35s var(--site-nav-ease),
        opacity 0.2s ease,
        top 0.35s var(--site-nav-ease),
        bottom 0.35s var(--site-nav-ease);
}

.site-header__burger-line:nth-child(1) {
    top: 0;
}

.site-header__burger-line:nth-child(2) {
    top: calc(50% - 1px);
}

.site-header__burger-line:nth-child(3) {
    bottom: 0;
}

.site-header--open .site-header__burger-line:nth-child(1) {
    top: calc(50% - 1px);
    transform: rotate(45deg);
}

.site-header--open .site-header__burger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0.2);
}

.site-header--open .site-header__burger-line:nth-child(3) {
    bottom: auto;
    top: calc(50% - 1px);
    transform: rotate(-45deg);
}

.site-header__backdrop {
    position: fixed;
    inset: 0;
    top: var(--site-header-bar-h);
    /* Musí zůstat pod .site-header__bar (z-index 2), jinak překryje celý bar včetně burgeru */
    z-index: 1;
    background: rgba(53, 50, 97, 0.35);
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.32s var(--site-nav-ease),
        visibility 0.32s var(--site-nav-ease);
    pointer-events: none;
}

.site-header--open .site-header__backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Mobilní panel */
@media (max-width: 899px) {
    .site-header__burger {
        display: flex;
    }

    .site-header__nav {
        --site-nav-drawer-pad: clamp(1.25rem, 4vw, 1.65rem);
        position: fixed;
        top: var(--site-header-bar-h);
        right: 0;
        bottom: 0;
        width: min(18rem, 88vw);
        max-width: 100%;
        padding: 0;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        background: #fff;
        border-left: 1px solid rgba(53, 50, 97, 0.14);
        border-top-left-radius: var(--site-nav-drawer-radius);
        box-shadow: -8px 0 24px rgba(53, 50, 97, 0.12);
        transform: translateX(102%);
        transition: transform 0.32s var(--site-nav-ease);
        z-index: 5;
    }

    .site-header--open .site-header__nav {
        transform: translateX(0);
    }

    .site-header__list {
        flex: 1;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0.25rem;
        padding: 1.1rem var(--site-nav-drawer-pad) 1.25rem;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }

    .site-header__item {
        width: 100%;
    }

    .site-header__link {
        width: 100%;
        justify-content: flex-start;
        padding: 0.7rem 0.85rem;
        border-radius: 8px;
        font-size: 0.9375rem;
        border: 1px solid transparent;
        background: rgba(53, 50, 97, 0.04);
    }

    .site-header__link:active {
        transform: scale(0.99);
    }

    /* Stejné „kartičkové“ pozadí jako ostatní položky — aktivní jen barva textu (globální pravidla). */
    .site-header__item.active-link > a.site-header__link:not(.site-header__link--cta),
    .site-header__item.active-link > details > summary.site-header__link,
    .site-header__link.is-active:not(.site-header__link--cta) {
        background: rgba(1, 151, 213, 0.08);
        border-color: transparent;
    }

    .site-header__details > summary.site-header__link {
        width: 100%;
        list-style: none;
    }

    .site-header__link--cta {
        margin-top: 0.35rem;
        text-align: center;
        justify-content: center;
        border-radius: 6px;
        padding: 0.65rem 1.35rem;
        font-weight: 700;
        border-width: 2px;
        border-style: solid;
        border-color: rgba(53, 50, 97, 0.35);
        background: transparent !important;
        color: var(--main, #353261) !important;
        box-shadow: none;
        transition:
            background 0.2s ease,
            color 0.2s ease,
            border-color 0.2s ease,
            transform 0.2s ease;
    }

    .site-header__link--cta:hover {
        background: rgba(53, 50, 97, 0.06) !important;
        border-color: var(--main, #353261);
        color: var(--main, #353261) !important;
    }

    .site-header__link--cta.is-active {
        background: transparent !important;
        border-color: rgba(53, 50, 97, 0.35);
        color: var(--main, #353261) !important;
    }

    .site-header__link--cta.is-active:hover {
        background: rgba(53, 50, 97, 0.06) !important;
        border-color: var(--main, #353261);
        color: var(--main, #353261) !important;
    }

    .site-header__sub {
        position: static;
        margin: 0.2rem 0 0.25rem 0;
        padding: 0.15rem 0 0.25rem;
        border: none;
        border-radius: 8px;
        background: rgba(53, 50, 97, 0.03);
    }

    .site-header__sub a {
        padding: 0.5rem 0.85rem 0.5rem 1.1rem;
        font-size: 0.875rem;
    }
}

@media (min-width: 900px) {
    .site-header__backdrop {
        display: none !important;
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none !important;
    }
}