* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    color: #e2e8f0;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Background Animated Blobs */
.bg-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    animation: move 20s infinite alternate;
}
.blob-1 { top: -10%; left: -10%; width: 500px; height: 500px; background: rgba(56, 189, 248, 0.2); }
.blob-2 { bottom: -10%; right: -10%; width: 600px; height: 600px; background: rgba(139, 92, 246, 0.2); animation-delay: -5s; }

@keyframes move {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 100px) scale(1.1); }
}

#presentation {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.slide {
    position: absolute;
    width: 90%;
    max-width: 1200px;
    height: 85%;
    opacity: 0;
    visibility: hidden;
    transform: translateY(50px) scale(0.95);
    transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.glass-panel {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    height: 100%;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.glass-panel::-webkit-scrollbar {
    width: 8px;
}
.glass-panel::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #38bdf8, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    text-align: center;
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #f8fafc;
    margin-bottom: 2rem;
}

.slide-content h2 {
    text-align: left;
    margin-bottom: 1.5rem;
    color: #38bdf8;
    border-bottom: 2px solid rgba(56, 189, 248, 0.3);
    padding-bottom: 0.5rem;
    font-size: 2.5rem;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
    align-self: center;
    margin-top: 2rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.6);
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    width: 100%;
    margin-top: 1rem;
}

.menu-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 16px;
    color: #e2e8f0;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    min-height: 220px;
}

.menu-item-week {
    color: #38bdf8;
    font-size: 0.95rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.menu-item-topic-list {
    list-style: none;
    margin: 0.5rem 0;
    padding: 0;
    width: 100%;
    flex-grow: 1;
}

.menu-item-topic-list li {
    font-size: 0.85rem;
    color: #cbd5e1;
    font-weight: 400;
    margin-bottom: 0.4rem;
    position: relative;
    padding-left: 0.8rem;
    line-height: 1.4;
}

.menu-item-topic-list li::before {
    content: '▪';
    color: #a78bfa;
    position: absolute;
    left: 0;
    font-size: 0.85rem;
}

.menu-item-action {
    font-size: 0.95rem;
    font-weight: 600;
    color: #10b981;
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: all 0.2s ease;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(56, 189, 248, 0.5);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.menu-item:hover .menu-item-action {
    transform: translateX(4px);
    color: #34d399;
}

.slide-content {
    flex-grow: 1;
}

.topic-list {
    list-style-type: none;
    margin-top: 1rem;
}

.topic-list > li {
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    padding-left: 2.5rem;
    position: relative;
    font-weight: 600;
    color: #f1f5f9;
}

.topic-list > li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: #a78bfa;
    font-weight: bold;
    font-size: 2rem;
    top: -2px;
}

.sub-topic {
    list-style-type: none;
    margin-top: 0.8rem;
    margin-bottom: 1rem;
}

.sub-topic li {
    font-size: 1.4rem;
    font-weight: 400;
    color: #cbd5e1;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}
.sub-topic li::before {
    content: '▪';
    color: #38bdf8;
    position: absolute;
    left: 0;
}

.nav-buttons {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.info-box {
    background: rgba(0,0,0,0.2); 
    padding: 25px; 
    border-radius: 12px; 
    margin: 20px 0; 
    font-size: 1.4rem; 
    color: #e2e8f0;
    line-height: 1.6;
    font-weight: 400;
}

.info-box p {
    margin-bottom: 15px;
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* Two-Column Slide Layout with Images */
.slide-content-layout {
    display: flex;
    flex-direction: row;
    gap: 3rem;
    flex-grow: 1;
    min-height: 0;
    width: 100%;
}

.slide-text-side {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding-right: 1rem;
}

.slide-text-side::-webkit-scrollbar {
    width: 6px;
}
.slide-text-side::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.slide-image-side {
    flex: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: 100%;
    max-height: 480px;
    align-self: center;
}

.slide-image-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85) contrast(1.1) saturate(0.9);
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.slide-image-side:hover img {
    transform: scale(1.05);
}

.slide-image-side::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    pointer-events: none;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .slide-content-layout {
        flex-direction: column;
        gap: 1.5rem;
        overflow-y: auto;
    }
    
    .slide-text-side {
        flex: none;
        padding-right: 0;
        overflow-y: visible;
    }
    
    .slide-image-side {
        flex: none;
        height: 250px;
        width: 100%;
        max-height: 250px;
    }
}