/* Fade In Up Animation */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* Staggered Delay for lists */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* Typing Cursor Animation */
.typing-cursor::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* 3D Flip Card */
.flip-card-container {
    perspective: 1000px;
    width: 300px;
    height: 300px; /* Fixed height matching HTML inline style */
    position: relative;
    z-index: 10;
}

.flip-card {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
    cursor: pointer;
}

.flip-card-container:hover .flip-card {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: var(--card-shadow);
}

.flip-card-front {
    background-color: var(--card-bg);
}

.flip-card-back {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    transform: rotateY(180deg);
}

.flip-card-back h3, .flip-card-back p {
    color: white;
}

/* Bouncing Animation for Scroll Indicator or Buttons */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.bounce {
    animation: bounce 2s infinite;
}

/* Timeline Animation */
.timeline-item {
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.5s ease-out;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-item:nth-child(even) {
    transform: translateX(20px);
}

.timeline-item:nth-child(even).visible {
    transform: translateX(0);
}

/* Pulse Effect for Interactive Elements */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(135, 206, 235, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(135, 206, 235, 0); }
    100% { box-shadow: 0 0 0 0 rgba(135, 206, 235, 0); }
}

.pulse {
    animation: pulse 2s infinite;
}

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