/* =====================================================================
   NAV: dropdown + mobile left-drawer
   1) In site.css DELETE this old rule:
        @media(max-width:900px){ nav{ display:none } }
   2) Paste everything below at the END of site.css
   ===================================================================== */

/* ---------- desktop ---------- */
.nav-toggle,
.nav-head,
.nav-overlay,
.sub-toggle { display: none }

.site-nav .has-sub {
    position: relative;
    display: flex;
    align-items: center;
    padding: 18px 0;               /* bigger hover area, no gap to dropdown */
}

.site-nav .has-sub > .sub-parent::after {
    content: "";
    display: inline-block;
    width: 6px; height: 6px;
    margin-left: 7px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-3px) rotate(45deg);
    transition: transform .2s;
}

.site-nav .sub {
    position: absolute;
    top: 100%;
    left: -14px;
    min-width: 230px;
    background: #fff;
    border: 1px solid var(--line);
    border-top: 3px solid var(--blue);
    border-radius: 0 0 8px 8px;
    box-shadow: var(--shadow-lg);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .2s, transform .2s, visibility .2s;
    z-index: 30;
}

.site-nav .sub a {
    display: block;
    padding: 10px 18px;
    border-bottom: 0;
    white-space: nowrap;
    text-transform: none;
    font-size: 14px;
    font-weight: 600;
}

.site-nav .sub a:hover {
    background: var(--bg);
    color: var(--blue);
    border-bottom: 0;
}

.site-nav .has-sub:hover > .sub,
.site-nav .has-sub:focus-within > .sub {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.site-nav .has-sub:hover > .sub-parent,
.site-nav .has-sub:focus-within > .sub-parent {
    color: var(--blue);
    border-bottom-color: var(--blue);
}

.site-nav .has-sub:hover > .sub-parent::after {
    transform: translateY(1px) rotate(225deg);
}

/* ---------- mobile / tablet: left drawer ---------- */
@media (max-width: 900px) {

    header .wrap { gap: 10px; min-height: 64px }
    .logo img { width: 130px }
    .reg-btn { padding: 8px 12px; font-size: 12px }

    /* hamburger */
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 42px; height: 42px;
        padding: 10px;
        background: transparent;
        border: 1px solid var(--line);
        border-radius: 8px;
        cursor: pointer;
        flex-shrink: 0;
    }
    .nav-toggle span {
        display: block;
        height: 2px;
        background: var(--navy);
        border-radius: 2px;
        transition: transform .25s, opacity .2s;
    }
    body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg) }
    body.nav-open .nav-toggle span:nth-child(2) { opacity: 0 }
    body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg) }

    /* dark backdrop */
    .nav-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(18, 38, 63, .55);
        opacity: 0;
        pointer-events: none;
        transition: opacity .3s;
        z-index: 1;
    }
    body.nav-open .nav-overlay { opacity: 1; pointer-events: auto }
    body.nav-open { overflow: hidden }

    /* the drawer */
    .site-nav {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        flex: none;
        gap: 0;
        position: fixed;
        top: 0; left: 0; bottom: 0;
        width: min(320px, 85vw);
        background: #fff;
        padding: env(safe-area-inset-top, 0px) 0 24px;
        overflow-y: auto;
        font-size: 14px;
        transform: translateX(-100%);
        visibility: hidden;
        transition: transform .3s ease, visibility .3s;
        box-shadow: var(--shadow-lg);
        z-index: 2;
    }
    body.nav-open .site-nav { transform: none; visibility: visible }

    .nav-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 20px;
        background: var(--navy);
        color: #fff;
        font-size: 15px;
        letter-spacing: .08em;
    }
    .nav-close {
        background: none;
        border: 0;
        color: #fff;
        font-size: 30px;
        line-height: 1;
        cursor: pointer;
    }

    .site-nav a {
        display: block;
        padding: 14px 20px;
        border-bottom: 1px solid #edf1f5;
        white-space: normal;
    }
    .site-nav a:hover { background: var(--bg); border-bottom-color: #edf1f5 }

    /* dropdown becomes an accordion */
    .site-nav .has-sub {
        display: grid;
        grid-template-columns: 1fr 52px;
        padding: 0;
        border-bottom: 1px solid #edf1f5;
    }
    .site-nav .has-sub > .sub-parent { border-bottom: 0 }
    .site-nav .has-sub > .sub-parent::after { display: none }

    .site-nav .sub-toggle {
        display: block;
        position: relative;
        background: none;
        border: 0;
        border-left: 1px solid #edf1f5;
        cursor: pointer;
    }
    .site-nav .sub-toggle::before {
        content: "";
        position: absolute;
        left: 50%; top: 50%;
        width: 8px; height: 8px;
        border-right: 2px solid var(--navy);
        border-bottom: 2px solid var(--navy);
        transform: translate(-50%, -70%) rotate(45deg);
        transition: transform .25s;
    }
    .site-nav .has-sub.open .sub-toggle::before { transform: translate(-50%, -30%) rotate(225deg) }

    .site-nav .sub {
        grid-column: 1 / -1;
        position: static;
        min-width: 0;
        border: 0;
        border-radius: 0;
        box-shadow: none;
        background: var(--bg);
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height .3s ease;
    }
    .site-nav .has-sub.open .sub { max-height: 400px }

    .site-nav .sub a {
        padding: 12px 20px 12px 36px;
        border-bottom: 1px solid #e3ebf2;
        font-size: 13.5px;
        white-space: normal;
    }

    /* disable hover-open on touch widths */
    .site-nav .has-sub:hover > .sub { opacity: 1; visibility: visible; transform: none }
}

@media (max-width: 380px) {
    .logo img { width: 105px }
    .reg-btn { padding: 7px 9px; font-size: 11px }
}