/* Base readable type on all devices */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

/* Gentle fluid scaling */
body {
    font-size: clamp(15px, 1.8vw, 17px);
    line-height: 1.6;
    padding-top: 130px;
}

/* ------------------ Header (shared) ------------------ */
.top-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
    transition: top 0.4s ease;
    background-color: var(--white);
    border-bottom: 1px solid var(--white);
}

.top-header .logo {
    height: 60px;
    max-height: 60px;
}

.header-hidden {
    top: -157px;
}

/* Nav link for home and faq */
.top-header .nav-link {
    color: var(--black);
    position: relative;
    transition: color 0.3s ease;
    font-weight: 500;
    font-size: 18px;
}

.top-header .nav-link:not(.dropdown-toggle)::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--black);
    transition: width 0.3s;
}

.top-header .nav-link:not(.dropdown-toggle):hover::after {
    width: 100%;
}

/* ---------- Desktop dropdown (Conferences) ---------- */
.menu-title {
    display: block;
    padding: 10px 15px;
    color: var(--black);
    font-weight: 500;
    font-size: 18px;
    text-transform: none;
    text-decoration: none;
    background: transparent;
    position: relative;
    transition: background-color 0.3s ease;
}

.menu-title::before,
.menu-dropdown:after {
    content: none !important;
}

.menu-dropdown {
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--light-gray-1);
    min-width: 100%;
    padding: 15px 0;
    z-index: 1000;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.custom-dropdown:hover .menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.menu-dropdown li {
    color: var(--black);
    height: 30px;
    padding: 5px 15px;
    background: transparent;
    white-space: nowrap;
    transition: 0.3s color ease, 0.3s background-color ease;
}

.menu-dropdown li:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dropdown-arrow {
    display: inline-block;
    transition: transform 0.3s ease;
}

.custom-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

/* --------------- Desktop search pill --------------- */
.desktop-search-trigger {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    height: 40px;
    padding: 0 16px 0 14px;
    border: 1px solid var(--light-gray-2);
    border-radius: 999px;
    background: #f3f3f3;
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: box-shadow 0.15s ease, background 0.15s ease;
}

.desktop-search-trigger i {
    font-size: 18px;
    color: var(--black);
    line-height: 1;
}

.desktop-search-trigger span {
    font-size: 16px;
    color: rgba(0, 0, 0, 0.8);
}

.desktop-search-trigger:hover {
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12);
    background: #f5f5f5;
}

.desktop-search-trigger:active {
    box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

/* Hide the old desktop search form if it still exists somewhere */
.desktop-search {
    display: none !important;
}

/* ----------- Mobile actions & icon buttons ----------- */
.icon-btn {
    position: relative;
    background: transparent;
    border: none;
    padding: 8px 10px;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    border-radius: 9999px;
}

.icon-btn::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: rgba(0, 0, 0, 0.08);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.icon-btn:hover::after,
.icon-btn:active::after {
    opacity: 1;
}

/* Ensure mobile action icons are black (avoid iOS link blue) */
.mobile-actions .icon-btn,
.mobile-actions .icon-btn i,
.drawer-close i {
    color: var(--black) !important;
}

/* Mobile actions hidden on desktop */
.mobile-actions {
    display: none;
    gap: 10px;
}

/* Desktop nav visible by default */
.desktop-nav {
    display: flex;
}

/* --------------- Section animation helpers --------------- */
.section-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    will-change: opacity, transform;
}
.section-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Breadcrumbs */
.breadcrumb {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;
}
.breadcrumb a {
    text-decoration: none;
}
.breadcrumb a:hover {
    text-decoration: underline;
}

/* --------------------- Mobile breakpoint --------------------- */
@media (max-width: 991.98px) {
    body {
        padding-top: 90px;
    }

    .top-header .container {
        flex-wrap: nowrap !important;
        gap: 8px;
    }

    .top-header .d-flex.align-items-center.gap-3 {
        flex: 1 1 auto;
        min-width: 0;
    }

    .top-header .logo {
        height: 40px;
        max-height: 40px;
    }

    .desktop-nav {
        display: none !important;
    }

    .desktop-search-trigger {
        display: none !important;
    }

    .mobile-actions {
        display: flex;
        flex-shrink: 0;
        margin-left: auto;
    }

    .breadcrumb-wrap {
        display: none;
    }

    .drawer-links a,
    .drawer-link-btn,
    .drawer-submenu a,
    .top-header .nav-link,
    .menu-title {
        font-size: 17px;
    }
}

/* ---------------- Slide-in Mobile Drawer ---------------- */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100dvh;
    width: 320px;
    max-width: 86%;
    background: #fff;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform 0.2s ease-out;
    z-index: 1100;
    padding: 16px;
    overflow-y: auto;
}
.mobile-drawer.is-open {
    transform: translateX(0);
}

.drawer-header {
    padding-bottom: 8px;
    border-bottom: 1px solid var(--light-gray-2);
}
.drawer-title {
    font-weight: 600;
    font-size: 18px;
}

.drawer-links {
    list-style: none;
    margin: 16px 0 0;
    padding: 0;
}
.drawer-links > li {
    padding: 10px 0;
}
.drawer-links a {
    color: rgba(0, 0, 0, 0.88);
    text-decoration: none;
    font-size: 16px;
}
.drawer-links a:hover {
    color: rgba(0, 0, 0, 0.6);
}

/* Drawer submenu (Conferences) */
.drawer-link-btn {
    width: 100%;
    background: transparent;
    border: none;
    padding: 10px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    cursor: pointer;
    color: rgba(0, 0, 0, 0.88);
    font-size: 16px;
}
.drawer-link-btn:hover {
    color: rgba(0, 0, 0, 0.6);
}
.drawer-chevron {
    transition: transform 0.2s ease;
}
.drawer-chevron.rotated {
    transform: rotate(90deg);
}
.drawer-submenu {
    list-style: none;
    margin: 0;
    padding: 0 0 0 12px;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.25s ease;
}
.drawer-submenu.open {
    max-height: 200px;
}
.drawer-submenu li {
    padding: 6px 0;
}

/* ----------------- Full-screen Search Overlay ----------------- */
.search-overlay {
    position: fixed;
    inset: 0;
    background: #fff;
    z-index: 1100;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.search-overlay.is-open {
    opacity: 1;
    transform: translateY(0);
}
.search-overlay[hidden] {
    display: none !important;
}

.search-overlay-bar {
    padding: 16px;
    border-bottom: 1px solid var(--light-gray-2);
}
.search-overlay-form {
    display: flex;
    align-items: center;
    gap: 10px;
}
.search-overlay-form i {
    font-size: 18px;
}
.search-overlay-form input {
    flex: 1;
    height: 44px;
    border: 1px solid var(--light-gray-2);
    border-radius: 999px;
    padding: 0 14px;
    font-size: 16px;
    outline: none;
}
.search-cancel {
    background: transparent;
    border: none;
    font-size: 16px;
    padding: 8px 10px;
    cursor: pointer;
}
.search-overlay-body {
    padding: 16px;
}

/* Backdrop + scroll lock */
.overlay-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 1050;
}
.overlay-backdrop.visible {
    opacity: 1;
}
.overlay-backdrop[hidden] {
    display: none !important;
}
body.modal-open {
    overflow: hidden;
}