<?php
/**
 * Custom CSS extracted from Gemini HTML design
 */
?>
html {
    scroll-behavior: smooth;
}

.premium-border {
    position: relative;
}
.premium-border::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 1.5px;
    background: linear-gradient(135deg, #0ea5e9, #10b981);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.reveal-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-element.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

.slide-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.slide-in-left.active {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.slide-in-right.active {
    opacity: 1;
    transform: translateX(0);
}

.css-cube-container {
    width: 160px;
    height: 160px;
    perspective: 800px;
}
.css-cube {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    animation: rotate-cube 15s linear infinite;
}
.css-cube-face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    opacity: 0.25;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.5), rgba(16, 185, 129, 0.5));
    border: 1px solid rgba(255, 255, 255, 0.4);
    filter: blur(0.5px);
    box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.3);
}
.face-front  { transform: translateZ(80px); }
.face-back   { transform: rotateY(180deg) translateZ(80px); }
.face-right  { transform: rotateY(90deg) translateZ(80px); }
.face-left   { transform: rotateY(-90deg) translateZ(80px); }
.face-top    { transform: rotateX(90deg) translateZ(80px); }
.face-bottom { transform: rotateX(-90deg) translateZ(80px); }

@keyframes rotate-cube {
    0% { transform: rotateX(0deg) rotateY(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

.css-orb {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    opacity: 0.18;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.6), rgba(16, 185, 129, 0.6));
    position: relative;
    filter: blur(1.5px);
    animation: float-gentle 7s ease-in-out infinite;
}

@keyframes float-gentle {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(2deg); }
}
@keyframes float-slow {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(12px) rotate(-3deg); }
}
@keyframes float-center {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -47%) scale(1.03); }
}
.animate-float-slow {
    animation: float-slow 10s ease-in-out infinite;
}
.animate-float-center {
    animation: float-center 12s ease-in-out infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}
.spin-icon {
    animation: spin 1s linear infinite;
}

#mobile-menu {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}