/* BioXR Public Site — Animations */

/* ── Fade-up on scroll ── */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-up.delay-1 {
    transition-delay: 0.1s;
}

.fade-up.delay-2 {
    transition-delay: 0.2s;
}

.fade-up.delay-3 {
    transition-delay: 0.3s;
}

/* ── Hero-specific animations (always run, not scroll-triggered) ── */
.hero .fade-up {
    animation: hero-fade-up 0.8s var(--ease-out) forwards;
    transition: none;
}

.hero .fade-up.delay-1 {
    animation-delay: 0.15s;
}

.hero .fade-up.delay-2 {
    animation-delay: 0.3s;
}

.hero .fade-up.delay-3 {
    animation-delay: 0.5s;
}

@keyframes hero-fade-up {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Subtle gradient animation on hero bg ── */
.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
    animation: gradient-drift 15s ease-in-out infinite alternate;
}

@keyframes gradient-drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(3%, 2%); }
}

/* ── Card hover glow ── */
.use-case-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(59, 130, 246, 0.06) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-normal) ease;
    pointer-events: none;
}

.use-case-card:hover::after {
    opacity: 1;
}

/* ── Loading spinner for contact form ── */
@keyframes spinner {
    to { transform: rotate(360deg); }
}

.btn.loading {
    pointer-events: none;
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spinner 0.6s linear infinite;
}