/* ============================================
   Rivers Medical Group — Custom Styles
   Clean Minimalist · Teal & Slate
   ============================================ */

/* --- Base & Typography --- */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: rgba(13, 148, 136, 0.15);
    color: #0f766e;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* --- Header --- */
#site-header {
    background: transparent;
    border-bottom: 1px solid transparent;
}

.header-text {
    transition: color 0.4s ease;
}

.header-text-muted {
    transition: color 0.4s ease;
}

.header-link {
    position: relative;
}

.header-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #0d9488;
    transition: width 0.3s ease;
}

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

/* Scrolled state */
#site-header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    border-bottom-color: rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

#site-header.scrolled .header-text {
    color: #0f172a;
}

#site-header.scrolled .header-text-muted {
    color: #64748b;
}

#site-header.scrolled .header-link {
    color: #475569;
}

#site-header.scrolled .header-link:hover {
    color: #0d9488;
}

#site-header.scrolled #menu-icon span {
    background: #0f172a;
}

/* --- Hero --- */
.hero-section {
    position: relative;
}

/* --- Service Cards --- */
.service-card {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.08);
}

/* --- Mobile Menu --- */
#mobile-menu {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.mobile-link {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

.mobile-link:hover {
    color: #0d9488;
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* Default state — content is visible even without JS */
[data-reveal] {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    [data-reveal] {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    
    [data-reveal].revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    [data-reveal-delay="1"] { transition-delay: 0.1s; }
    [data-reveal-delay="2"] { transition-delay: 0.2s; }
    [data-reveal-delay="3"] { transition-delay: 0.3s; }
    [data-reveal-delay="4"] { transition-delay: 0.4s; }
    [data-reveal-delay="5"] { transition-delay: 0.5s; }
}

/* --- Form Inputs --- */
input:focus,
textarea:focus {
    border-color: #0d9488 !important;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.08);
    outline: none;
}

/* --- Buttons --- */
button,
a[href="#contact"] {
    position: relative;
    overflow: hidden;
}

/* --- Image Containers --- */
.overflow-hidden {
    will-change: transform;
}

/* --- Utility --- */
.text-balance {
    text-wrap: balance;
}

/* --- Responsive adjustments --- */
@media (max-width: 768px) {
    .font-serif {
        line-height: 1.1;
    }
}

/* --- Print --- */
@media print {
    #site-header,
    #mobile-menu,
    .scroll-indicator {
        display: none !important;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}