html, body { 
    font-family: 'Kanit', sans-serif; 
    background-color: #0F111A; 
    color: #F3F4F6;
    -webkit-user-select: none; /* ห้ามคลุมดำข้อความและรูปภาพ */
    -ms-user-select: none;
    user-select: none;
}

* {
    -webkit-tap-highlight-color: transparent;
}

a, button {
    -webkit-tap-highlight-color: transparent !important;
}

#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border-bottom 0.3s ease;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid transparent;
}

.btn-gold {
    position: relative;
    background: linear-gradient(90deg, #EAB308 0%, #FACC15 50%, #EAB308 100%);
    background-size: 200% auto;
    color: #0F111A;
    border: 1px solid rgba(254, 240, 138, 0.4);
    box-shadow: 0 4px 15px rgba(250, 204, 21, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.6);
    transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: 1;
    overflow: hidden;
}
.btn-gold::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: -1;
}
.btn-gold:hover {
    background-position: right center;
    box-shadow: 0 10px 40px rgba(250, 204, 21, 0.6), inset 0 1px 2px rgba(255, 255, 255, 1);
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.8);
    color: #000;
}
.btn-gold:hover::before {
    left: 150%;
}

.btn-glass {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    color: #d1d5db;
    transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    overflow: hidden;
    z-index: 1;
}
.btn-glass::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(250, 204, 21, 0.4), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: -1;
}
.btn-glass:hover {
    background: rgba(250, 204, 21, 0.05);
    border-color: rgba(250, 204, 21, 0.6);
    box-shadow: 0 10px 30px rgba(250, 204, 21, 0.25), inset 0 0 15px rgba(250, 204, 21, 0.1);
    transform: translateY(-3px);
    color: #fff;
}
.btn-glass:hover::before {
    left: 150%;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0%;
    height: 2px;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #FACC15;
    transition: width 0.3s ease;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: white; }
.glass-panel {
    background: rgba(15, 17, 26, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.nav-scrolled {
    background-color: rgba(15, 17, 26, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

/* Premium Text Reveal Animation */
@keyframes premiumReveal {
    0% {
        opacity: 0;
        transform: translate3d(0, 20px, 0);
    }
    100% {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}
.animate-premium-reveal {
    animation: premiumReveal 1.2s cubic-bezier(0.25, 1, 0.5, 1) both;
    will-change: transform, opacity;
}
.premium-delay-150 { animation-delay: 150ms; }
.premium-delay-300 { animation-delay: 300ms; }
.premium-delay-450 { animation-delay: 450ms; }
.premium-delay-600 { animation-delay: 600ms; }

/* Floating Particles */
@keyframes floatUpParticle {
    0% {
        transform: translateY(0vh) translateX(0) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
        transform: translateY(-10vh) translateX(10px) scale(1);
    }
    50% {
        opacity: 0.6;
        transform: translateY(-50vh) translateX(-15px) scale(1);
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(-120vh) translateX(20px) scale(0);
        opacity: 0;
    }
}
.particle {
    position: absolute;
    bottom: -20px;
    border-radius: 50%;
    animation: floatUpParticle linear infinite;
    opacity: 0;
    pointer-events: none;
}

.diamond {
    width: 6px; height: 6px;
    background: #FACC15;
    transform: rotate(45deg);
    display: inline-block;
}