/* Core Slider Styles - Optimized for Performance */
.tuition-slider {
    position: relative;
    width: 100%;
    height: var(--slider-height, 600px);
    overflow: hidden;
    background: #f5f5f0;
    /* Reserve space to prevent CLS */
    aspect-ratio: 1920 / 600;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    /* Use transform for GPU acceleration */
    transform: translateX(100%);
    transition: opacity 0.6s ease-in-out, transform 0.6s ease-in-out;
    /* Prevent layout shifts */
    will-change: opacity, transform;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
    z-index: 1;
}

.slide.prev {
    transform: translateX(-100%);
}

/* Image optimization */
.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* Prevent layout shift */
    display: block;
}

/* Lazy load placeholder */
.slide img.lazy-load:not([src]) {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Slide Content */
.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    z-index: 2;
    max-width: 90%;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 15px;
    backdrop-filter: blur(5px);
}

.slide-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.slide-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    line-height: 1.5;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.slide-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: #8b9a3e;
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: background 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.slide-button:hover {
    background: #7a8a35;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

/* Navigation Dots */
.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.dot:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.dot.active {
    background: #8b9a3e;
    width: 30px;
    border-radius: 6px;
}

/* Navigation Arrows */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    font-size: 3rem;
    width: 60px;
    height: 60px;
    cursor: pointer;
    z-index: 3;
    transition: background 0.3s ease;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.slider-arrow:hover {
    background: rgba(139, 154, 62, 0.9);
}

.slider-arrow.prev {
    left: 20px;
}

.slider-arrow.next {
    right: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .tuition-slider {
        height: 400px;
    }
    
    .slide-content {
        padding: 1.5rem;
    }
    
    .slide-button {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }
    
    .slider-arrow {
        width: 45px;
        height: 45px;
        font-size: 2rem;
    }
    
    .slider-arrow.prev {
        left: 10px;
    }
    
    .slider-arrow.next {
        right: 10px;
    }
}

@media (max-width: 480px) {
    .tuition-slider {
        height: 300px;
    }
    
    .slide-content {
        padding: 1rem;
    }
    
    .slider-dots {
        bottom: 15px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .slide,
    .dot,
    .slider-arrow,
    .slide-button {
        transition: none;
    }
}

/* Print styles */
@media print {
    .slider-arrow,
    .slider-dots {
        display: none;
    }
    
    .slide {
        position: static;
        opacity: 1;
        transform: none;
    }
}