/* ========================================
   Dr. Chris J. Wu — Custom Styles
   Vibrant Modern | Charcoal + Coral
   ======================================== */

/* --- Base & Typography --- */
html {
    scroll-behavior: smooth;
}

body {
    background-color: #121212;
    color: #ffffff;
}

::selection {
    background: #FF6B35;
    color: #121212;
}

/* --- Geometric Hero Shapes --- */
.hero-shape {
    will-change: transform;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.shape-coral-circle {
    background: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
}

.shape-coral-rect {
    background: rgba(255, 107, 53, 0.08);
}

/* --- Service Cards --- */
.service-card {
    will-change: transform;
}

.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 1.5rem;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.service-card:hover::before {
    opacity: 1;
}

/* --- Visit Cards --- */
.visit-card {
    will-change: transform;
}

/* --- Scroll Reveal Animations --- */
/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.hidden-reveal {
    opacity: 0;
    transform: translateY(30px);
}

.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; }

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .reveal.hidden-reveal {
        opacity: 1;
        transform: translateY(0);
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .hero-shape {
        transition: none;
    }
}

/* --- Navbar Scroll State --- */
.navbar-scrolled {
    background: rgba(18, 18, 18, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* --- Mobile Menu --- */
.mobile-menu-open {
    opacity: 1 !important;
    pointer-events: all !important;
}

.menu-open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-open .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-open .menu-line:nth-child(3) {
    width: 20px;
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Button Hover Effects --- */
a, button {
    -webkit-tap-highlight-color: transparent;
}

/* --- Image Loading --- */
img {
    image-rendering: -webkit-optimize-contrast;
}

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

::-webkit-scrollbar-track {
    background: #121212;
}

::-webkit-scrollbar-thumb {
    background: #3D3D3D;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #FF6B35;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .font-serif {
        letter-spacing: -0.01em;
    }
}

/* --- Focus Styles for Accessibility --- */
:focus-visible {
    outline: 2px solid #FF6B35;
    outline-offset: 2px;
}

/* --- Print Styles --- */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .hero-shape,
    .reveal {
        display: none;
    }
}