/*!
 * Custom Navbar — fixed-top with transparent → frosted-glass scroll transition
 * Replaces the old Start Bootstrap scrolling-nav template styles.
 */

/* Smooth-scrolling baseline */
html { scroll-behavior: smooth; }

/* Avatar circle (kept from prior template, used by .figure-img) */
.figure-img { border-radius: 50%; }

/* ------------------------------------------------------------------ */
/*  Fixed-top Navbar                                                  */
/* ------------------------------------------------------------------ */
#mainNav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    padding: 12px 0;
    /* Black semi-transparent frosted bar */
    background: rgba(0, 0, 0, 0.55);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.22);
    transition: background 0.35s ease, padding 0.25s ease,
                box-shadow 0.35s ease, border-color 0.35s ease,
                backdrop-filter 0.35s ease;
}

/* Initial state — dark frosted bar over the hero. Crisp white text. */
#mainNav .navbar-brand,
#mainNav .nav-link,
#mainNav .navbar-toggler {
    color: #fff;
    transition: color 0.25s ease, opacity 0.25s ease, background 0.25s ease;
}
#mainNav .navbar-brand,
#mainNav .nav-link,
#mainNav .brand-text,
#mainNav .brand-text-sub { color: #ffffff; }
#mainNav .nav-link:hover,
#mainNav .nav-link.active { color: #ffd166; }
#mainNav .nav-item .nav-link::after { background: #ffd166; }
#mainNav .brand-text-sub { opacity: 1; }

/* Brand */
#mainNav .navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.05em;
    letter-spacing: 0.01em;
}
#mainNav .navbar-brand:hover { text-decoration: none; opacity: 0.92; }
#mainNav .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, #009688 0%, #00796b 100%);
    color: #fff;
    font-size: 1.1em;
    box-shadow: 0 2px 10px rgba(0, 150, 136, 0.35);
}
#mainNav .brand-text { line-height: 1.1; }
#mainNav .brand-text-sub {
    font-weight: 400;
    opacity: 0.75;
    margin-left: 2px;
}

/* Nav links: subtle pill hover + active underline */
#mainNav .navbar-nav { gap: 4px; }
#mainNav .nav-item .nav-link {
    position: relative;
    padding: 8px 14px;
    font-size: 0.95em;
    font-weight: 500;
    border-radius: 6px;
}
#mainNav .nav-item .nav-link::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    background: #009688;
    border-radius: 2px;
    opacity: 0;
    transform: scaleX(0.4);
    transition: opacity 0.25s ease, transform 0.25s ease;
}
#mainNav .nav-item .nav-link:hover::after,
#mainNav .nav-item .nav-link.active::after {
    opacity: 1;
    transform: scaleX(1);
}

/* Challenge as a featured CTA pill */
#mainNav .nav-item-cta .nav-link {
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 999px;
    padding: 7px 16px;
    margin-left: 6px;
    background: rgba(0, 150, 136, 0.18);
    color: #fff;
    font-weight: 600;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
}
#mainNav .nav-item-cta .nav-link:hover,
#mainNav .nav-item-cta.show .nav-link {
    background: #009688;
    border-color: #009688;
    color: #fff;
    transform: translateY(-1px);
}
#mainNav .nav-item-cta .nav-link::after { display: none; }
#mainNav .nav-item-cta .nav-link i { margin-right: 4px; }
#mainNav .nav-item-cta .dropdown-toggle::after {
    margin-left: 6px;
    vertical-align: 0.15em;
    border-top-color: currentColor;
}

/* Dropdown menu — matches dark frosted nav */
#mainNav .dropdown-menu {
    background: rgba(18, 20, 24, 0.92);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 10px;
    padding: 8px;
    margin-top: 10px;
    min-width: 220px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

/* Desktop: open dropdown on hover, with a small invisible bridge so
   the cursor can travel from toggle to menu without losing hover. */
@media (min-width: 992px) {
    #mainNav .dropdown:hover > .dropdown-menu,
    #mainNav .dropdown.show > .dropdown-menu {
        display: block;
    }
    #mainNav .dropdown-menu { margin-top: 6px; }
    #mainNav .dropdown::after {
        content: "";
        position: absolute;
        top: 100%;
        right: 0;
        height: 14px;
        width: 220px;
    }
}
#mainNav .dropdown-item {
    color: #fff;
    padding: 9px 14px;
    border-radius: 6px;
    font-size: 0.93em;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.18s ease, color 0.18s ease;
}
#mainNav .dropdown-item i {
    color: #ffd166;
    font-size: 1.05em;
    width: 18px;
    text-align: center;
}
#mainNav .dropdown-item:hover,
#mainNav .dropdown-item:focus,
#mainNav .dropdown-item.active {
    background: rgba(0, 150, 136, 0.30);
    color: #fff;
}
#mainNav .dropdown-item.active i { color: #ffd166; }

/* Scrolled-state dropdown — light theme */
#mainNav.scrolled .dropdown-menu {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(0, 150, 136, 0.18);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.10);
}
#mainNav.scrolled .dropdown-item { color: #333; }
#mainNav.scrolled .dropdown-item i { color: #009688; }
#mainNav.scrolled .dropdown-item:hover,
#mainNav.scrolled .dropdown-item:focus,
#mainNav.scrolled .dropdown-item.active {
    background: rgba(0, 150, 136, 0.10);
    color: #009688;
}

/* Mobile toggler */
#mainNav .navbar-toggler {
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 6px;
    padding: 4px 10px;
}
#mainNav .navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255,255,255,0.85)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------------ */
/*  Scrolled state — frosted glass on white, dark text                */
/* ------------------------------------------------------------------ */
#mainNav.scrolled {
    padding: 8px 0;
    background: rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: saturate(160%) blur(12px);
    backdrop-filter: saturate(160%) blur(12px);
    border-bottom: 1px solid rgba(0, 150, 136, 0.12);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
}
#mainNav.scrolled .navbar-brand,
#mainNav.scrolled .nav-link,
#mainNav.scrolled .navbar-toggler { text-shadow: none; }
#mainNav.scrolled .navbar-brand,
#mainNav.scrolled .brand-text,
#mainNav.scrolled .brand-text-sub { color: #1a1a1a; }
#mainNav.scrolled .brand-text-sub { color: #777; }
#mainNav.scrolled .nav-link { color: #333; }
#mainNav.scrolled .nav-link:hover,
#mainNav.scrolled .nav-link.active { color: #009688; }
#mainNav.scrolled .nav-item .nav-link::after { background: #009688; }

#mainNav.scrolled .nav-item-cta .nav-link {
    background: #009688;
    border-color: #009688;
    color: #fff;
}
#mainNav.scrolled .nav-item-cta .nav-link:hover {
    background: #00796b;
    border-color: #00796b;
}

#mainNav.scrolled .navbar-toggler { border-color: rgba(0, 0, 0, 0.2); }
#mainNav.scrolled .navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(0,0,0,0.7)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------------ */
/*  Mobile menu styling                                               */
/* ------------------------------------------------------------------ */
@media (max-width: 991px) {
    #mainNav .navbar-collapse {
        background: rgba(255, 255, 255, 0.97);
        -webkit-backdrop-filter: blur(8px);
        backdrop-filter: blur(8px);
        margin-top: 8px;
        border-radius: 8px;
        padding: 12px;
        box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    }
    #mainNav .navbar-collapse .nav-link,
    #mainNav .navbar-collapse .brand-text { color: #1a1a1a; }
    #mainNav .navbar-collapse .nav-link:hover,
    #mainNav .navbar-collapse .nav-link.active { color: #009688; }
    #mainNav .navbar-collapse .nav-item-cta .nav-link {
        background: #009688;
        border-color: #009688;
        color: #fff;
        margin-top: 6px;
    }
    #mainNav .nav-item .nav-link::after { display: none; }
}

@media (max-width: 480px) {
    #mainNav .brand-text-sub { display: none; }
}