/* Modern CSS Reset and Performance Optimizations */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body{
    margin: 0;
}

:root {
    /* CSS Custom Properties for theming */
    --primary-color: #ff5a5f;
    --secondary-color: #484848;
    --accent-color: #ffd700;
    --text-light: #ffffff;
    --text-dark: #222222;
    --overlay-dark: rgba(0, 0, 0, 0.4);
    --overlay-light: rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition-fast: 0.3s ease;
    --transition-slow: 0.8s ease;
    --shadow-light: 0 2px 20px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 15px 50px rgba(0, 0, 0, 0.3);
}

/* Performance: Use hardware acceleration */
.carousel-slide,
.carousel-arrow,
.btn,
.dot {
    will-change: transform, opacity;
    transform: translateZ(0);
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--text-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.loading-spinner.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--overlay-light);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Main carousel styling */
.carousel-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: var(--text-dark);
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.carousel-slide.active {
    opacity: 1;
}

/* Fallback background for when images are loading */
.carousel-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    opacity: 0.3;
    z-index: -1;
}

/* Content overlay */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        var(--overlay-dark) 0%,
        var(--overlay-light) 50%,
        var(--overlay-dark) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-light);
    z-index: 10;
    padding: 2rem;
}

/* Typography */
.main-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.02em;
    line-height: 1.1;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.5s;
}

.subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 300;
    margin-bottom: 3rem;
    max-width: 600px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    line-height: 1.4;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.8s;
}

/* Button group */
.button-group {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 1.1s;
}

/* Modern button styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-light);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #e91e63 100%);
    color: var(--text-light);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    background: linear-gradient(135deg, #ff3339 0%, #c2185b 100%);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.btn-tertiary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #ffa726 100%);
    color: var(--text-dark);
}

.btn-tertiary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    background: linear-gradient(135deg, #ffcd3c 0%, #ff9800 100%);
}

/* Carousel navigation */
.carousel-dots {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 20;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

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

.dot.active {
    background: var(--text-light);
    border-color: var(--primary-color);
    transform: scale(1.3);
}

/* Carousel arrows */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-light);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-arrow:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-light);
}

.carousel-arrow-left {
    left: 2rem;
}

.carousel-arrow-right {
    right: 2rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .overlay {
        padding: 1rem;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
    }
    
    .carousel-arrow-left {
        left: 1rem;
    }
    
    .carousel-arrow-right {
        right: 1rem;
    }
    
    .main-title {
        margin-bottom: 0.5rem;
    }
    
    .subtitle {
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    .carousel-dots {
        bottom: 1rem;
    }
    
    .dot {
        width: 10px;
        height: 10px;
    }
    
    .overlay {
        padding: 0.5rem;
    }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .carousel-slide {
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .overlay {
        background: rgba(0, 0, 0, 0.8);
    }
}

/* Print styles */
@media print {
    .carousel-container {
        position: static;
        height: auto;
    }
    
    .carousel-slide {
        position: static;
        opacity: 1;
        height: 300px;
        page-break-inside: avoid;
    }
    
    .carousel-arrow,
    .carousel-dots {
        display: none;
    }
    
    .btn {
        border: 2px solid #000;
        color: #000 !important;
        background: #fff !important;
    }
}