/*
================================================
Space Vanta Theme 1.0
Module:
Header
File:
public/header/header.css
Purpose:
Global Header Structure
Responsibilities:
- Header container
- Desktop brand row
- Desktop navigation
- Desktop dropdown
- Mobile header
- Mobile navigation drawer
- Header divider
Note:
Architecture migration from:
public/base/header.css
Visual values preserved in HV-001.
================================================
*/
/* =================================================
   HEADER
   ================================================= */
.sv-header {
    position: relative;
    z-index: 20;
    background: var(--sv-bg);
    color: var(--sv-text);
    border-bottom:
        1px solid var(--sv-border);
}

/* =================================================
   DESKTOP BRAND ROW
   ================================================= */
.sv-header__desktop {
    min-height: 104px;
    padding:
        0 var(--sv-desktop-padding);
    display: grid;
    grid-template-columns:
        minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 30px;
}

/* =================================================
   DESKTOP UTILITY ZONE
   ================================================= */

.sv-header__desktop .sv-header__utility {

    justify-self: end;

    transform:
        translateX(18px);

}

/* =================================================
   DESKTOP HEADER DIVIDER
   Blurred Metallic Reflection
   ================================================= */

.sv-header__navigation {
    position: relative;
    display: block;
}

/* Main metallic diffusion */
.sv-header__navigation::before {
    content: "";
    position: absolute;
    top: 0;
    left: var(--sv-desktop-padding);
    right: var(--sv-desktop-padding);

    height: 2px;

    background:
        linear-gradient(90deg,
            transparent 0%,
            rgba(175, 182, 190, .07) 8%,
            rgba(195, 201, 208, .20) 25%,
            rgba(220, 224, 229, .34) 50%,
            rgba(195, 201, 208, .20) 75%,
            rgba(175, 182, 190, .07) 92%,
            transparent 100%);

    filter: blur(.35px);

    opacity: .88;

    pointer-events: none;
}

/* Concentrated metallic highlight */
.sv-header__navigation::after {
    content: "";
    position: absolute;
    top: 0;
    left: 24%;
    right: 24%;

    height: 1px;

    background:
        linear-gradient(90deg,
            transparent 0%,
            rgba(225, 229, 233, .12) 20%,
            rgba(245, 247, 249, .34) 50%,
            rgba(225, 229, 233, .12) 80%,
            transparent 100%);

    filter: blur(.25px);

    opacity: .82;

    pointer-events: none;
}

/* =================================================
   DESKTOP NAVIGATION
   ================================================= */
.sv-header__navigation {
    position: relative;
    display: block;
}

.sv-header__nav {
    width: 100%;
}

.sv-header__nav>ul {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
}

.sv-header__nav-item {
    position: relative;
    padding: 16px 0;
}

.sv-header__nav-item>a {
    display: block;
    font-size: 13px;
    line-height: 1.4;
    white-space: nowrap;
}

/* =================================================
   DESKTOP DROPDOWN
   ================================================= */
.sv-header__dropdown {
    position: absolute;
    left: 50%;
    top: 100%;
    min-width: 260px;
    padding: 22px;
    transform: translateX(-50%);
    background: var(--sv-surface);
    border:
        1px solid var(--sv-border);
    opacity: 0;
    visibility: hidden;
    transition:
        opacity .18s ease,
        visibility .18s ease;
}

.sv-header__nav-item:hover>.sv-header__dropdown {
    opacity: 1;
    visibility: visible;
}

.sv-header__dropdown>ul>li+li {
    margin-top: 12px;
}

.sv-header__dropdown a {
    font-size: 13px;
}

.sv-header__level-3 {
    margin-top: 8px;
    margin-left: 14px;
}

.sv-header__level-3 li+li {
    margin-top: 7px;
}

/* =================================================
   MOBILE
   ================================================= */
.sv-header__mobile {
    display: none;
}

/* =================================================
   MOBILE BREAKPOINT
   ================================================= */
@media(max-width:767px) {
    .sv-header__desktop {
        display: none;
    }

    .sv-header__navigation {
        display: none;
    }

    .sv-header__mobile {
        min-height: 64px;
        padding:
            0 var(--sv-mobile-padding);
        display: grid;
        grid-template-columns:
            1fr auto 1fr;
        align-items: center;
        gap: 16px;
    }

    /* ---------------------------------------------
     Mobile Menu
     --------------------------------------------- */
    .sv-mobile-menu {
        position: relative;
    }

.sv-mobile-menu>summary {

    display: inline-flex;

    align-items: center;

    justify-content: center;

    width: 24px;

    height: 24px;

    cursor: pointer;

    line-height: 1;

    list-style: none;

}

    .sv-mobile-menu>summary::-webkit-details-marker {
        display: none;
    }

    /* ---------------------------------------------
     Mobile Wordmark
     --------------------------------------------- */
    .sv-header__mobile .sv-header__wordmark {
        justify-content: center;
    }

    .sv-header__mobile .sv-wordmark__text {
        font-size: 16px;
        letter-spacing: .09em;
    }

    /* ---------------------------------------------
     Mobile Actions
     --------------------------------------------- */
.sv-header__mobile-actions {

    display: flex;

    align-items: center;

    justify-content: flex-end;

    gap: 14px;

}

.sv-header__mobile-action {

    position: relative;

    display: inline-flex;

    align-items: center;

    justify-content: center;

    width: 23px;

    height: 23px;

    color: inherit;

    text-decoration: none;

}
    /* ---------------------------------------------
     Mobile Drawer
     --------------------------------------------- */
    .sv-mobile-menu__drawer {
        position: absolute;
        left:
            calc(-1 * var(--sv-mobile-padding));
        top: 44px;
        width: 100vw;
        min-height: 70vh;
        padding:
            26px var(--sv-mobile-padding);
        background: var(--sv-bg);
        border-top:
            1px solid var(--sv-border);
        border-bottom:
            1px solid var(--sv-border);
    }

    .sv-mobile-menu__drawer-header {
        padding-bottom: 22px;
        border-bottom:
            1px solid var(--sv-border);
    }

    .sv-mobile-menu__drawer-title {
        font-size: 12px;
        line-height: 1;
        font-weight: 600;
        letter-spacing: .08em;
    }

    .sv-mobile-menu__drawer nav>ul {
        padding-top: 10px;
    }

    .sv-mobile-menu__drawer li {
        border-bottom:
            1px solid var(--sv-border);
    }

    .sv-mobile-menu__drawer a,
    .sv-mobile-menu__drawer summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 50px;
        font-size: 15px;
        line-height: 1.4;
        cursor: pointer;
        list-style: none;
    }

    .sv-mobile-menu__drawer summary::-webkit-details-marker {
        display: none;
    }

    .sv-mobile-menu__drawer details>summary::after {
        content: "+";
        margin-left: 16px;
        font-size: 16px;
        font-weight: 300;
    }

    .sv-mobile-menu__drawer details[open]>summary::after {
        content: "−";
    }

    .sv-mobile-menu__drawer details>ul {
        padding:
            0 0 8px 14px;
    }

    .sv-mobile-menu__drawer details>ul a,
    .sv-mobile-menu__drawer details>ul summary {
        min-height: 42px;
        font-size: 14px;
    }

    .sv-mobile-menu__drawer details>ul details>ul {
        padding-left: 14px;
    }
}