* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 40%, #60a5fa 70%, rgba(147, 197, 253, 0.8) 100%);
    color: white;
}

/* Progress Bar */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    z-index: 1000;
}

#progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #93c5fd 0%, #60a5fa 50%, #3b82f6 100%);
    width: 0%;
    transition: width 0.5s ease;
}

/* Slides Container */
#slides-container {
    width: 100%;
    height: 100vh;
    position: relative;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
    z-index: 2;
}

.slide.prev {
    opacity: 0;
    transform: translateX(-100%);
}

.content {
    text-align: center;
    padding: 20px;
    max-width: 800px;
}

/* Typography */
.title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #fff, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 1s ease;
}

.subtitle {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.3s backwards;
}

.slide-title {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.stat-big {
    font-size: 6rem;
    font-weight: 700;
    margin: 20px 0;
    opacity: 0;
    animation: scaleIn 0.8s ease 0.5s forwards;
}

.stat-medium {
    font-size: 3rem;
    font-weight: 600;
    margin: 20px 0;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.stat-small {
    font-size: 1.5rem;
    font-weight: 300;
    margin-top: 30px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1.1s forwards;
}

.stat-description {
    font-size: 1.8rem;
    font-weight: 300;
    opacity: 0.9;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

/* Color variations */
.green {
    color: #4ade80;
}

.red {
    color: #f87171;
}

/* Stats Container */
.stat-container {
    display: flex;
    gap: 60px;
    justify-content: center;
    margin: 40px 0;
}

.stat-item {
    flex: 1;
}

.stat-label {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-top: 10px;
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin: 60px 0;
}

.summary-item {
    padding: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.summary-item:nth-child(1) { animation-delay: 0.3s; }
.summary-item:nth-child(2) { animation-delay: 0.5s; }
.summary-item:nth-child(3) { animation-delay: 0.7s; }
.summary-item:nth-child(4) { animation-delay: 0.9s; }

.summary-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.summary-label {
    font-size: 1.2rem;
    opacity: 0.8;
}

.final-message {
    font-size: 2rem;
    font-weight: 300;
    margin-top: 40px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1.2s forwards;
}

/* CTA Button */
.cta-button {
    padding: 20px 60px;
    font-size: 1.5rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: 2px solid white;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* Navigation */
#navigation {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 30px;
    z-index: 100;
}

.nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

#slide-counter {
    font-size: 1.2rem;
    font-weight: 500;
    min-width: 80px;
    text-align: center;
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 2rem;
    }
    
    .stat-big {
        font-size: 4rem;
    }
    
    .stat-medium {
        font-size: 2rem;
    }
    
    .slide-title {
        font-size: 1.5rem;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stat-container {
        flex-direction: column;
        gap: 30px;
    }
}