/* ==========================================================================
   Brain - sdilena horni navigace
   Markup vykresluje /nav.js. Styly jsou scopovane pod .app-nav, aby je
   neprebily obecne styly jednotlivych stranek.
   ========================================================================== */

.app-nav {
    --nav-primary: #667eea;
    --nav-primary-dark: #4c5cc5;
    --nav-primary-soft: #eef0fd;
    --nav-text: #5a6072;
    --nav-text-strong: #2f3445;
    --nav-border: #e8eaf2;
    --nav-height: 60px;

    position: sticky;
    top: 0;
    z-index: 900;
    background: #fff;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 1px 3px rgba(23, 26, 41, .06);
    margin-bottom: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.app-nav__inner {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: var(--nav-height);
}

/* ---------- Brand ---------- */
.app-nav__brand {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
    text-decoration: none;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -.01em;
    white-space: nowrap;
    padding: 6px 4px;
    border-radius: 8px;
}
.app-nav__brand-mark { font-size: 20px; line-height: 1; }
.app-nav__brand-text { color: var(--nav-text-strong); font-weight: 600; }
.app-nav__brand-text b { color: var(--nav-primary); font-weight: 700; }
.app-nav__brand:hover .app-nav__brand-text { color: var(--nav-primary-dark); }

/* ---------- Hlavni menu ---------- */
.app-nav__menu {
    display: flex;
    align-items: center;
    flex: 1 1 auto;
    flex-wrap: wrap;
    row-gap: 2px;
    gap: 2px;
    min-width: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}
.app-nav__item { position: relative; list-style: none; margin: 0; }

.app-nav__link,
.app-nav__trigger {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 12px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: var(--nav-text);
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color .15s ease, color .15s ease;
}
.app-nav__link:hover,
.app-nav__trigger:hover {
    background: #f4f5fa;
    color: var(--nav-text-strong);
}
.app-nav__link:focus-visible,
.app-nav__trigger:focus-visible {
    outline: 2px solid var(--nav-primary);
    outline-offset: 2px;
}

.app-nav__ico { font-size: 15px; line-height: 1; width: 18px; text-align: center; flex: 0 0 18px; }

.app-nav__caret {
    width: 9px;
    height: 9px;
    flex: 0 0 9px;
    margin-left: 1px;
    opacity: .55;
    transition: transform .18s ease;
}
.app-nav .is-open > .app-nav__trigger .app-nav__caret,
.app-nav .is-open > .app-nav__account-btn .app-nav__caret { transform: rotate(180deg); }

/* Aktivni polozka - plna pilulka misto modreho podtrzeni */
.app-nav__link.is-active {
    background: var(--nav-primary);
    color: #fff;
    box-shadow: 0 2px 6px rgba(102, 126, 234, .35);
}
.app-nav__link.is-active:hover { background: var(--nav-primary-dark); color: #fff; }

/* Skupina, ve ktere lezi aktivni stranka - jemne zvyrazneni */
.app-nav__item.is-current > .app-nav__trigger {
    background: var(--nav-primary-soft);
    color: var(--nav-primary-dark);
}
.app-nav__item.is-current > .app-nav__trigger:hover { background: #e4e8fc; }
.app-nav .is-open > .app-nav__trigger { background: #eceefb; color: var(--nav-primary-dark); }

/* ---------- Rozbalovaci nabidka ---------- */
.app-nav__dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 236px;
    max-height: calc(100vh - var(--nav-height) - 24px);
    overflow-y: auto;
    margin: 0;
    padding: 6px;
    list-style: none;
    background: #fff;
    border: 1px solid var(--nav-border);
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(23, 26, 41, .14);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity .15s ease, transform .15s ease, visibility .15s;
    z-index: 950;
}
.app-nav__dropdown--flip { left: auto; right: 0; }
.app-nav .is-open > .app-nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
/* neviditelny mustek, aby kurzor cestou do nabidky nespadl mimo */
.app-nav .is-open > .app-nav__dropdown::before {
    content: "";
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    height: 8px;
}

.app-nav__dropdown .app-nav__link {
    width: 100%;
    padding: 9px 11px;
    border-radius: 8px;
    font-weight: 500;
    white-space: normal;
}
.app-nav__dropdown .app-nav__link.is-active {
    font-weight: 600;
    box-shadow: none;
}

.app-nav__sep { height: 1px; margin: 6px 4px; background: var(--nav-border); }

/* ---------- Prava cast: verze + ucet ---------- */
.app-nav__right {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex: 0 0 auto;
}
.app-nav__version {
    color: #a8adbd;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}
.app-nav__account { position: relative; }
.app-nav__account-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 10px 5px 5px;
    border: 1px solid var(--nav-border);
    border-radius: 999px;
    background: #fff;
    color: var(--nav-text-strong);
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    max-width: 210px;
    transition: background-color .15s ease, border-color .15s ease;
}
.app-nav__account-btn:hover { background: #f4f5fa; border-color: #d9dcea; }
.app-nav__avatar {
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #8a63d2);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .02em;
}
.app-nav__account-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.app-nav__logout {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 11px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #d0343f;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}
.app-nav__logout:hover { background: #fdeced; }

/* prvky, ktere existuji jen kvuli zpetne kompatibilite starych skriptu */
.app-nav__legacy { display: none !important; }

/* ---------- Hamburger ---------- */
.app-nav__burger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid var(--nav-border);
    border-radius: 9px;
    background: #fff;
    color: var(--nav-text-strong);
    cursor: pointer;
}
.app-nav__burger:hover { background: #f4f5fa; }
.app-nav__burger span {
    position: relative;
    display: block;
    width: 16px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
}
.app-nav__burger span::before,
.app-nav__burger span::after {
    content: "";
    position: absolute;
    left: 0;
    width: 16px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
}
.app-nav__burger span::before { top: -5px; }
.app-nav__burger span::after { top: 5px; }

/* ---------- Kompaktni rezim (uzka okna) ---------- */
@media (max-width: 1180px) {
    .app-nav__link, .app-nav__trigger { padding: 8px 10px; font-size: 13.5px; }
}

@media (max-width: 1000px) {
    .app-nav__burger { display: flex; order: -1; }
    .app-nav__brand-text { display: none; }

    .app-nav__menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        max-height: calc(100vh - var(--nav-height));
        overflow-y: auto;
        padding: 10px;
        background: #fff;
        border-bottom: 1px solid var(--nav-border);
        box-shadow: 0 14px 28px rgba(23, 26, 41, .12);
    }
    .app-nav.is-menu-open .app-nav__menu { display: flex; }

    .app-nav__link, .app-nav__trigger { width: 100%; font-size: 15px; padding: 11px 12px; }
    .app-nav__trigger { justify-content: flex-start; }
    .app-nav__trigger .app-nav__caret { margin-left: auto; }

    /* v mobilnim rezimu se skupiny chovaji jako rozbalovaci sekce */
    .app-nav__dropdown {
        position: static;
        display: none;
        min-width: 0;
        max-height: none;
        margin: 2px 0 6px 10px;
        padding: 4px 0 4px 10px;
        border: 0;
        border-left: 2px solid var(--nav-primary-soft);
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }
    .app-nav .is-open > .app-nav__dropdown { display: block; }
    .app-nav__account-name { display: none; }
    .app-nav__version { display: none; }
}

@media (max-width: 420px) {
    .app-nav__inner { padding: 0 10px; gap: 8px; }
    .app-nav__account-btn { padding: 4px; border-color: transparent; }
}

@media print {
    .app-nav { display: none; }
}