/* ============================================
   Kristen Nelson Dental — Custom Styles
   ============================================ */

/* Base / Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: #1B4332;
    color: #FBF9F6;
}

/* Navbar */
#navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(251, 249, 246, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(27, 67, 50, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: #1B4332;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

#navbar.scrolled .nav-link {
    color: #1B4332;
}

/* Mobile menu */
.mobile-nav-link {
    position: relative;
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(27, 67, 50, 0.08);
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-nav-link:hover {
    color: #3d7a4a;
    padding-left: 0.5rem;
}

/* Hero floating cards animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.floating-card-1 {
    animation: float 4s ease-in-out infinite;
}

.floating-card-2 {
    animation: float 4s ease-in-out infinite 0.5s;
}

.floating-card-3 {
    animation: float 4s ease-in-out infinite 1s;
}

/* Service cards */
.service-card {
    opacity: 1;
}

/* Scroll reveal (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #1B4332;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Form textarea resize */
textarea {
    min-height: 120px;
}

/* Smooth image loading */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}

img[data-src] {
    opacity: 0;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #F7F3ED;
}

::-webkit-scrollbar-thumb {
    background: #b8d0bc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #8fb894;
}