/* ===========================================================
   DUTCH AIRTHERM - HEADER STYLES v2
   =========================================================== */
:root {
    --color-primary:      #1F2A38;
    --color-secondary:    #2B2F33;
    --color-accent:       #3FA7D6;
    --color-red:          #B11226;
    --color-white:        #FFFFFF;
    --color-light:        #F4F6F8;
    --color-border:       rgba(255,255,255,0.12);
    --color-border-light: #DDE2E8;
    --font-main:          'Poppins', sans-serif;
    --topbar-height:      90px;
    --navbar-height:      50px;
    --header-total:       calc(var(--topbar-height) + var(--navbar-height));
    --container-max:      1280px;
    --container-pad:      clamp(1.25rem, 4vw, 2.5rem);
    --transition-fast:    0.18s ease;
    --transition-med:     0.28s ease;
    --radius-btn:         3px;
    --radius-search:      50px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body { font-family: var(--font-main); padding-top: var(--header-total); }

.da-container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

/* -- Header wrapper ---------------------------------------- */
.da-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    width: 100%;
    box-shadow: 0 2px 20px rgba(31,42,56,0.10);
}

/* -- Topbar ------------------------------------------------- */
.da-topbar {
    background-color: var(--color-white);
    height: var(--topbar-height);
    border-bottom: 1px solid var(--color-border-light);
}

.da-topbar__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 100%;
    gap: 1.5rem;
}

.da-topbar__socials { display: flex; align-items: center; gap: 0.6rem; }

.da-topbar__social {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--color-light); color: var(--color-secondary);
    text-decoration: none; flex-shrink: 0;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.da-topbar__social svg { width: 16px; height: 16px; }
.da-topbar__social:hover                  { background: var(--color-accent); color: var(--color-white); }
.da-topbar__social--youtube:hover         { background: #FF0000; color: var(--color-white); }
.da-topbar__social--facebook:hover        { background: #1877F2; color: var(--color-white); }

.da-topbar__logo {
    display: flex; align-items: center; justify-content: center;
    text-decoration: none;
}
.da-topbar__logo-img { height: 75px; width: auto; display: block; object-fit: contain; }
.da-topbar__logo-text { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); }

.da-topbar__search { display: flex; justify-content: flex-end; }

.da-search-wrapper { position: relative; width: 100%; max-width: 280px; }

.da-search-form {
    display: flex; align-items: center;
    background: var(--color-light);
    border-radius: var(--radius-search);
    padding: 0.35rem 0.35rem 0.35rem 1.1rem;
    gap: 0.5rem; width: 100%;
    transition: box-shadow var(--transition-fast), background var(--transition-fast);
}
.da-search-form:focus-within {
    box-shadow: 0 0 0 2px var(--color-accent);
    background: var(--color-white);
}
.da-search-form__input {
    flex: 1; background: none; border: none; outline: none;
    font-family: var(--font-main); font-size: 0.875rem;
    color: var(--color-secondary); min-width: 0;
}
.da-search-form__input::placeholder { color: #aab0b8; }

.da-search-form__btn {
    display: flex; align-items: center; justify-content: center;
    width: 34px; height: 34px;
    background: var(--color-accent); border: none; border-radius: 50%;
    cursor: pointer; color: var(--color-white); flex-shrink: 0;
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.da-search-form__btn:hover { background: #2d93bf; transform: scale(1.05); }
.da-search-form__btn svg { width: 15px; height: 15px; }

/* Live zoekresultaten dropdown */
.da-search-results-dropdown {
    position: absolute;
    top: calc(100% + 8px); right: 0;
    width: 380px; background: var(--color-white);
    border: 1px solid var(--color-border-light);
    border-top: 3px solid var(--color-accent);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 8px 24px rgba(31,42,56,0.12);
    display: none; z-index: 200;
}
.da-search-results-dropdown.is-open { display: block; }

.da-search-result-item {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.7rem 1rem; text-decoration: none;
    color: var(--color-secondary);
    border-bottom: 1px solid var(--color-border-light);
    transition: background var(--transition-fast);
}
.da-search-result-item:last-child { border-bottom: none; }
.da-search-result-item:hover { background: var(--color-light); }

.da-search-result-item__type {
    font-size: 0.68rem; font-weight: 600;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--color-accent); flex-shrink: 0; min-width: 70px;
}
.da-search-result-item__title { font-size: 0.875rem; color: var(--color-primary); font-weight: 500; }
.da-search-no-results { padding: 1rem; font-size: 0.875rem; color: #aaa; text-align: center; }

/* -- Navbar ------------------------------------------------- */
.da-navbar { background-color: var(--color-primary); height: var(--navbar-height); }

.da-navbar__inner {
    display: flex; align-items: center; justify-content: center;
    height: 100%; max-width: var(--container-max);
    margin-inline: auto; padding-inline: var(--container-pad);
}

.da-nav__list { display: flex; align-items: center; list-style: none; height: 100%; }

.da-nav__list > li { position: relative; height: 100%; display: flex; align-items: center; }

.da-nav__list a { text-decoration: none !important; }

.da-nav__list > li > a {
    display: flex; align-items: center; gap: 0.3rem;
    padding: 0 1.1rem; height: 100%;
    font-size: 0.78rem; font-weight: 500;
    letter-spacing: 0.07em; text-transform: uppercase;
    color: rgba(255,255,255,0.8); text-decoration: none;
    white-space: nowrap; position: relative;
    transition: color var(--transition-fast), background var(--transition-fast);
}
.da-nav__list > li > a::after {
    display: none;
}
.da-nav__list > li > a:hover,
.da-nav__list > li.current-menu-item > a,
.da-nav__list > li.current-menu-ancestor > a {
    color: var(--color-white);
    background: rgba(255,255,255,0.06);
}
.da-nav__list > li > a:hover::after,
.da-nav__list > li.current-menu-item > a::after,
.da-nav__list > li.current-menu-ancestor > a::after { transform: scaleX(1); }
.da-nav__list > li.current-menu-item > a { color: var(--color-accent); }

/* Submenu dropdown */
.da-nav__list .sub-menu {
    position: absolute; top: 100%; left: 0;
    min-width: 230px; background: var(--color-white);
    border-top: 3px solid var(--color-accent);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 8px 24px rgba(31,42,56,0.15);
    list-style: none; padding: 0.5rem 0;
    opacity: 0; visibility: hidden; transform: translateY(-6px);
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
    z-index: 100;
}
.da-nav__list li:hover > .sub-menu,
.da-nav__list li:focus-within > .sub-menu {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.da-nav__list .sub-menu a {
    display: block; padding: 0.6rem 1.25rem;
    font-size: 0.85rem; font-weight: 400;
    color: var(--color-secondary); text-decoration: none;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    border-left: 2px solid transparent;
}
.da-nav__list .sub-menu a:hover {
    color: var(--color-primary); padding-left: 1.5rem;
    border-left-color: var(--color-accent);
}

/* -- Hamburger --------------------------------------------- */
.da-hamburger {
    display: none; flex-direction: column;
    justify-content: center; align-items: center;
    gap: 5px; width: 38px; height: 38px;
    background: none; border: 1px solid var(--color-border);
    border-radius: var(--radius-btn); cursor: pointer; padding: 0.5rem;
    transition: background var(--transition-fast);
}
.da-hamburger:hover { background: rgba(255,255,255,0.08); }
.da-hamburger__bar {
    display: block; width: 20px; height: 2px;
    background: var(--color-white); border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    transform-origin: center;
}
.da-hamburger[aria-expanded="true"] .da-hamburger__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.da-hamburger[aria-expanded="true"] .da-hamburger__bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.da-hamburger[aria-expanded="true"] .da-hamburger__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -- Backdrop ---------------------------------------------- */
.da-overlay-backdrop {
    position: fixed; inset: 0; z-index: 999;
    background: rgba(31,42,56,0.5); backdrop-filter: blur(2px);
    opacity: 0; visibility: hidden;
    transition: opacity var(--transition-med), visibility var(--transition-med);
}
.da-overlay-backdrop.is-visible { opacity: 1; visibility: visible; }

/* -- Footer ------------------------------------------------- */
.da-footer {
    background: var(--color-primary);
    padding: 2rem 0;
    margin-top: 4rem;
}
.da-footer__inner { display: flex; align-items: center; justify-content: center; }
.da-footer__copy { font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* -- Mobiel ------------------------------------------------- */
@media (max-width: 1024px) {
    .da-hamburger { display: flex; }
    .da-topbar__search { display: none; }

    .da-navbar__inner { justify-content: space-between; }

    .da-navbar__nav {
        position: fixed;
        top: var(--header-total); left: 0; right: 0; bottom: 0;
        background: var(--color-primary);
        padding: 1.5rem var(--container-pad);
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform var(--transition-med);
        z-index: 998;
    }
    .da-navbar__nav.is-open { transform: translateX(0); }

    .da-nav__list { flex-direction: column; align-items: stretch; height: auto; gap: 0; }
    .da-nav__list > li { height: auto; }
    .da-nav__list a { text-decoration: none !important; }

.da-nav__list > li > a {
        height: auto; padding: 0.9rem 0;
        font-size: 1rem; text-transform: none; letter-spacing: 0;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .da-nav__list > li > a::after { display: none; }
    .da-nav__list .sub-menu {
        position: static; box-shadow: none; border: none;
        opacity: 1; visibility: visible; transform: none;
        padding: 0 0 0 1rem;
        background: rgba(255,255,255,0.05);
        display: none; border-radius: 0;
    }
    .da-nav__list li.is-open > .sub-menu { display: block; }
    .da-nav__list .sub-menu a {
        color: rgba(255,255,255,0.7); border-left: none;
        padding: 0.65rem 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .da-nav__list .sub-menu a:hover { color: var(--color-white); padding-left: 1.25rem; }
    .da-topbar__inner { grid-template-columns: auto 1fr; }
    .da-topbar__logo { justify-content: flex-start; margin-left: 0.5rem; }
    .da-topbar__logo-img { height: 44px; }
}

@media (max-width: 640px) {
    :root { --topbar-height: 70px; --navbar-height: 44px; }
    .da-topbar__social { width: 32px; height: 32px; }
    .da-topbar__social svg { width: 14px; height: 14px; }
}

:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,1px); white-space: nowrap; border-width: 0; }