/* ===== Sticky Header Behavior ===== */

/* Base navbar styling with smooth transitions */
.navbar {
    position: relative;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.320, 1);
    z-index: 98;
}

/* Navbar brand styling */
.navbar-brand {
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.navbar-brand h1 {
    transition: font-size 0.3s ease, margin 0.3s ease;
}

/* Nav links with smooth transitions */
.navbar-nav .nav-link {
    transition: padding 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Active navbar state - when user scrolls down */
.navbar.scrolled {
    padding-top: 12px !important;
    padding-bottom: 12px !important;
    box-shadow: 0 2px 10px rgba(26, 31, 54, 0.08);
    background-color: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(10px);
}

.navbar.scrolled .navbar-brand h1 {
    font-size: 1.25rem;
}

.navbar.scrolled .navbar-nav .nav-link {
    padding: 12px 15px !important;
    font-size: 15px;
}

/* Navbar brand styling adjustments when scrolled */
.navbar.scrolled .navbar-brand {
    transition: transform 0.3s ease;
}

.navbar.scrolled .navbar-brand p {
    font-size: 0.9rem;
}

/* Smooth transitions for nav-link underline effect */
.navbar-light .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 15px;
    right: 15px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.navbar-light .navbar-nav .nav-link:hover::after,
.navbar-light .navbar-nav .nav-link.active::after {
    transform: scaleX(1);
}

.navbar.scrolled .navbar-light .navbar-nav .nav-link::after {
    bottom: 6px;
}

/* Mobile navbar adjustments */
@media (max-width: 991.98px) {
    .navbar {
        padding: 15px 20px;
    }

    .navbar.scrolled {
        padding-top: 10px !important;
        padding-bottom: 10px !important;
    }

    .navbar-brand h1 {
        font-size: 1.5rem;
    }

    .navbar.scrolled .navbar-brand h1 {
        font-size: 1.25rem;
    }

    .navbar-light .navbar-nav .nav-link {
        padding: 10px 0 !important;
        font-size: 14px;
    }

    .navbar.scrolled .navbar-nav .nav-link {
        padding: 10px 0 !important;
    }

    /* Hide underline effect on mobile for cleaner look */
    .navbar-light .navbar-nav .nav-link::after {
        display: none;
    }
}

/* Ensure backdrop filter is smooth */
@supports (-webkit-backdrop-filter: blur(10px)) {
    .navbar.scrolled {
        -webkit-backdrop-filter: blur(10px);
    }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .navbar,
    .navbar-brand,
    .navbar-brand h1,
    .navbar-nav .nav-link,
    .navbar-light .navbar-nav .nav-link::after {
        transition: none;
    }
}

/* Shadow intensity adjustment */
.navbar.scrolled {
    box-shadow: 0 4px 16px rgba(26, 31, 54, 0.1);
}

/* High contrast mode support */
@media (prefers-contrast: more) {
    .navbar.scrolled {
        border-bottom: 2px solid var(--primary);
        box-shadow: 0 2px 8px rgba(26, 31, 54, 0.15);
    }
}