/* Core Styles */
body {
    background-color: #ffffff;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}
html.dark body { background-color: #000000; }

/* Pattern */
.bg-pattern {
    background-image: url('../../images/Background.webp');
    background-size: 400px;
    background-repeat: repeat;
    background-position: center;
    animation: bgMove 120s linear infinite;
}
@keyframes bgMove {
    0% { background-position: 0 0; }
    100% { background-position: 400px 400px; }
}
html:not(.dark) .bg-pattern { filter: opacity(0.06); }
html.dark .bg-pattern { filter: invert(1) opacity(0.11); }

/* Top Blur */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 150px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    mask-image: linear-gradient(to bottom, black 0%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 0%, transparent 100%);
    z-index: 40;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

body.hide-top-blur::before {
    opacity: 0;
}

/* Glass Card */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}
html.dark .glass-panel {
    background: rgba(20, 20, 20, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Glows */
html:not(.dark) { --glow-color-start: rgba(0, 0, 0, 0.2); --glow-color-end: rgba(0, 0, 0, 0.4); }
html.dark { --glow-color-start: rgba(255, 255, 255, 0.4); --glow-color-end: rgba(255, 255, 255, 0.8); }

.theme-icon-glow { filter: none; }
html.dark .theme-icon-glow { filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.8)); }

.glow-red-border {
    box-shadow: 0 0 0 1px rgba(220, 38, 38, 0.2), 0 10px 30px -5px rgba(220, 38, 38, 0.15);
}

/* Ripple */
.ripple {
    position: absolute; border-radius: 50%; transform: scale(0);
    animation: ripple 0.6s linear; background-color: rgba(255, 255, 255, 0.4);
    pointer-events: none; z-index: 50;
}
@keyframes ripple { to { transform: scale(4); opacity: 0; } }

/* Mobile Menu Animation */
.menu-link-item { opacity: 0; transform: translateX(-20px); transition: opacity 0.4s ease-out, transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
.menu-animate-open .menu-link-item { opacity: 1; transform: translateX(0); }
.menu-animate-open .menu-link-item:nth-child(1) { transition-delay: 0.1s; }
.menu-animate-open .menu-link-item:nth-child(2) { transition-delay: 0.15s; }
.menu-animate-open .menu-link-item:nth-child(3) { transition-delay: 0.2s; }
.menu-animate-open .menu-link-item:nth-child(4) { transition-delay: 0.25s; }
.menu-animate-open .menu-link-item:nth-child(5) { transition-delay: 0.3s; }
.menu-animate-open .menu-link-item:nth-child(6) { transition-delay: 0.35s; }
.menu-animate-open .menu-chat-btn { opacity: 1; transform: translateY(0); transition-delay: 0.4s; }
.menu-chat-btn { opacity: 0; transform: translateY(20px); transition: opacity 0.4s ease-out, transform 0.4s ease-out; }
.blur-content { filter: blur(5px); transition: filter 0.3s ease-out; pointer-events: none; user-select: none; }

/* View Transitions API for Theme Toggle */
::view-transition-old(root),
::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
}

/* Button Glare Animation */
.btn-glare {
    position: relative;
    overflow: hidden;
}
.btn-glare::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: skewX(-25deg);
    animation: glare 3s infinite;
    pointer-events: none;
    z-index: 10;
}
@keyframes glare {
    0% { left: -100%; }
    20% { left: 200%; } /* Fast sweep */
    100% { left: 200%; } /* Pause before next loop */
}

/* Hide Header on Mobile Footer Intersection */
.header-hidden-mobile {
    transform: translate(-50%, -200%) !important; /* Maintain X centering, move Y up */
    opacity: 0;
    pointer-events: none;
}