/* ============================================
   YIFANG — Custom Styles
   ============================================ */

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

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

body {
    overflow-x: hidden;
}

/* Selection Color */
::selection {
    background-color: #c9a84c;
    color: #0f1c3f;
}

/* ============================================
   Navbar Scroll State
   ============================================ */
.navbar-scrolled #navbar {
    background-color: rgba(5, 10, 23, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(201, 168, 76, 0.1);
}

.navbar-scrolled #navbar .menu-line {
    background-color: white;
}

/* ============================================
   Mobile Menu
   ============================================ */
.mobile-menu-open #mobileMenu {
    opacity: 1;
    pointer-events: all;
}

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

.mobile-menu-open .menu-line:nth-child(2) {
    opacity: 0;
    transform: translateX(10px);
}

.mobile-menu-open .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    width: 1.5rem;
}

/* ============================================
   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);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: no-preference) {
    .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);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered delays for grid items */
.reveal:nth-child(1) { transition-delay: 0.05s; }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.15s; }
.reveal:nth-child(4) { transition-delay: 0.2s; }
.reveal:nth-child(5) { transition-delay: 0.25s; }
.reveal:nth-child(6) { transition-delay: 0.3s; }

/* ============================================
   Form Styles
   ============================================ */
input:focus,
textarea:focus {
    outline: none;
    border-color: #c9a84c !important;
}

input::placeholder,
textarea::placeholder {
    color: #b3bdd4;
}

/* ============================================
   Smooth Image Loading
   ============================================ */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}

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

::-webkit-scrollbar-track {
    background: #0f1c3f;
}

::-webkit-scrollbar-thumb {
    background: #c9a84c;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #f2c94e;
}

/* ============================================
   Focus Visible for Accessibility
   ============================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #c9a84c;
    outline-offset: 2px;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    #navbar,
    #contact,
    .reveal {
        display: none !important;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    .font-serif {
        color: #000 !important;
    }
}