/* ============================================
   ANIMATIONS - Scroll Effects & Transitions
   ============================================ */

/* Scroll Animations */
.scroll-fade-in,
.scroll-slide-left,
.scroll-slide-right {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

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

.scroll-slide-left {
    transform: translateX(-30px) translateY(20px);
}

.scroll-slide-left.visible {
    opacity: 1;
    transform: translateX(0) translateY(0);
}

.scroll-slide-right {
    transform: translateX(30px) translateY(20px);
}

.scroll-slide-right.visible {
    opacity: 1;
    transform: translateX(0) translateY(0);
}

/* Stagger Animation */
.pain-card:nth-child(1) { transition-delay: 0.1s; }
.pain-card:nth-child(2) { transition-delay: 0.2s; }
.pain-card:nth-child(3) { transition-delay: 0.3s; }
.pain-card:nth-child(4) { transition-delay: 0.4s; }

.trust-card:nth-child(1) { transition-delay: 0.1s; }
.trust-card:nth-child(2) { transition-delay: 0.2s; }
.trust-card:nth-child(3) { transition-delay: 0.3s; }

.step:nth-child(1) { transition-delay: 0.1s; }
.step:nth-child(2) { transition-delay: 0.2s; }
.step:nth-child(3) { transition-delay: 0.3s; }

/* Button Animations */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.btn-primary {
    animation: pulse 2s infinite;
}

.btn-primary:hover {
    animation: none;
}

/* Loading Animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(179, 31, 40, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* Slide Down Animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-down {
    animation: slideDown 0.3s ease-out;
}

/* Scale Animation */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn 0.3s ease-out;
}

/* Shake Animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.3s ease-in-out;
}

/* Success Animation */
@keyframes successPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(76, 175, 80, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    }
}

.success {
    animation: successPulse 0.6s ease-out;
}

/* Smooth Transitions */
* {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

button, a {
    transition: all 0.3s ease;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}