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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    overflow: hidden;
    height: 100vh;
}

.presentation-container {
    width: 100%;
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide {
    display: none;
    width: 90%;
    max-width: 1200px;
    height: 85vh;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 60px;
    overflow-y: auto;
    animation: slideIn 0.5s ease-in-out;
}

.slide.active {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.title-slide {
    text-align: center;
    justify-content: center;
}

.title-slide h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-slide h2 {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 30px;
    font-weight: 300;
}

.subtitle {
    font-size: 1.5rem;
    color: #666;
    margin-top: 20px;
}

h1 {
    font-size: 3rem;
    color: #333;
    margin-bottom: 40px;
    border-bottom: 4px solid #667eea;
    padding-bottom: 15px;
}

h2 {
    font-size: 2rem;
    color: #555;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.5rem;
    color: #667eea;
    margin-bottom: 15px;
}

p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

.large-text {
    font-size: 2.5rem;
    text-align: center;
    color: #667eea;
    font-weight: bold;
}

/* Agenda List */
.agenda-list {
    list-style: none;
    padding: 0;
}

.agenda-list li {
    font-size: 1.5rem;
    padding: 20px;
    margin: 15px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-left: 5px solid #667eea;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.agenda-list li:hover {
    transform: translateX(10px);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.content-item {
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
    border-top: 4px solid #667eea;
}

/* Timeline */
.timeline {
    margin-top: 30px;
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 25px;
    top: 50px;
    width: 2px;
    height: calc(100% + 20px);
    background: #667eea;
}

.timeline-marker {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-right: 30px;
    flex-shrink: 0;
    z-index: 1;
}

.timeline-content {
    flex: 1;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

/* Objectives List */
.objectives-list {
    list-style: none;
    padding: 0;
}

.objectives-list li {
    font-size: 1.4rem;
    padding: 20px;
    margin: 15px 0;
    background: #f8f9fa;
    border-radius: 10px;
    position: relative;
    padding-left: 50px;
}

.objectives-list li::before {
    content: '✓';
    position: absolute;
    left: 15px;
    color: #667eea;
    font-size: 1.8rem;
    font-weight: bold;
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.resource-card {
    padding: 30px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    border: 2px solid #e0e0e0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.resource-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* Q&A Content */
.qa-content {
    text-align: center;
    padding: 60px 0;
}

.qa-content p {
    margin: 20px 0;
}

/* Controls */
.controls {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 30px;
    background: rgba(255, 255, 255, 0.95);
    padding: 15px 30px;
    border-radius: 50px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.nav-btn {
    padding: 12px 25px;
    font-size: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 600;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.nav-btn:active {
    transform: translateY(0);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.slide-counter {
    font-size: 1rem;
    color: #667eea;
    font-weight: 600;
    min-width: 80px;
    text-align: center;
}

/* Keyboard Hint */
.keyboard-hint {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #666;
    z-index: 1000;
}

/* Responsive Design */
@media (max-width: 768px) {
    .slide {
        width: 95%;
        padding: 30px;
        height: 80vh;
    }

    .title-slide h1 {
        font-size: 2.5rem;
    }

    .title-slide h2 {
        font-size: 1.8rem;
    }

    h1 {
        font-size: 2rem;
    }

    .content-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .controls {
        bottom: 15px;
        padding: 10px 20px;
        gap: 15px;
    }

    .nav-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }

    .keyboard-hint {
        display: none;
    }
}

/* Scrollbar Styling */
.slide::-webkit-scrollbar {
    width: 8px;
}

.slide::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.slide::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

.slide::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}