:root {
            /* Light Theme Variables */
            --primary: #2563eb;       /* Royal Blue */
            --primary-dark: #1e3a8a;
            --primary-light: #eff6ff;
            --accent: #0f172a;        /* Slate 900 */
            --text-main: #1e293b;     /* Slate 800 */
            --text-secondary: #475569; /* Slate 600 */
            --bg-main: #ffffff;
            --bg-secondary: #f8fafc;  /* Slate 50 */
            --border: #e2e8f0;        /* Slate 200 */
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg-secondary);
            color: var(--text-main);
            line-height: 1.5;
            height: 100vh;
            overflow: hidden;
        }

        /* Abstract Background */
        .bg-decoration {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        
        .bg-blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.4;
        }
        
        .blob-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: #dbeafe; }
        .blob-2 { bottom: -10%; right: -10%; width: 40vw; height: 40vw; background: #e0e7ff; }

        /* Slide Container */
        .presentation {
            position: relative;
            width: 100%;
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .slide {
            position: absolute;
            width: 100%; /* Default width */
            max-width: 1280px;
            height: 100%; /* Full height */
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            flex-direction: column;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .slide.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        /* Typography */
        h1, h2, h3 {
            color: var(--accent);
            letter-spacing: -0.025em;
        }

        .slide-header {
            margin-bottom: var(--spacing-md);
            border-bottom: 2px solid var(--border);
            padding-bottom: var(--spacing-sm);
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
        }

        .slide-title {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--primary-dark);
        }

        .slide-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Base Components */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }

        .card {
            background: var(--bg-main);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .card:hover { /* Slight hover effect for interactivity */
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
        }
        
        .card-icon svg { width: 24px; height: 24px; }

        .card h3 {
            font-size: 1.125rem;
            margin-bottom: 0.5rem;
        }

        .card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* Specific Layouts */
        
        /* Cover Slide */
        .slide-cover {
            text-align: center;
            justify-content: center;
            align-items: center;
        }
        
        .cover-content {
            max-width: 900px;
        }
        
        .cover-logo {
            width: 80px;
            height: 80px;
            background: var(--primary);
            border-radius: 16px;
            margin: 0 auto 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            box-shadow: var(--shadow-lg);
        }

        .cover-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .cover-subtitle {
            font-size: 1.5rem;
            color: var(--text-secondary);
            margin-bottom: 3rem;
            font-weight: 500;
        }
        
        .cover-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            font-weight: 500;
            color: var(--accent);
        }

        /* Table Styled Lists */
        .info-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-main);
        }
        
        .info-item {
            display: flex;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border);
        }
        
        .info-item:last-child { border-bottom: none; }
        
        .info-label {
            width: 25%;
            font-weight: 600;
            color: var(--text-secondary);
        }
        
        .info-val {
            width: 75%;
            font-weight: 500;
            color: var(--text-main);
        }

        /* Timeline */
        .timeline-container {
            position: relative;
            padding-left: 2rem;
        }
        
        .timeline-container::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: var(--border);
        }
        
        .timeline-row {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 1.5rem;
        }
        
        .timeline-row::before {
            content: '';
            position: absolute;
            left: -2.35rem;
            top: 0.25rem;
            width: 12px;
            height: 12px;
            background: var(--bg-main);
            border: 3px solid var(--primary);
            border-radius: 50%;
        }
        
        .time-date {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.25rem;
        }
        
        .time-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }
        
        .time-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Budget Bars */
        .budget-row {
            margin-bottom: 1.5rem;
        }
        
        .budget-info {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
            font-weight: 600;
            font-size: 0.95rem;
        }
        
        .progress-track {
            height: 8px;
            background: var(--bg-secondary);
            border-radius: 4px;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        
        .progress-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 4px;
        }
        
        .fill-blue { background: #3b82f6; }
        .fill-indigo { background: #6366f1; }
        .fill-teal { background: #14b8a6; }
        .fill-rose { background: #f43f5e; }

        /* Risk Matrix */
        .risk-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 99px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }
        
        .risk-high { background: #fee2e2; color: #991b1b; }
        .risk-med { background: #fef3c7; color: #92400e; }
        .risk-low { background: #d1fae5; color: #065f46; }

        /* Controls */
        .controls {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            display: flex;
            gap: 0.5rem;
            z-index: 100;
        }
        
        .btn-ctrl {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: var(--bg-main);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .btn-ctrl:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .page-indicator {
            position: fixed;
            bottom: 2rem;
            left: 2rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Utilities */
        .text-center { text-align: center; }
        .mt-4 { margin-top: 2rem; }
        .text-primary { color: var(--primary); }

/* Start Overlay */
.start-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}

.btn-start {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-start:hover {
    transform: scale(1.1);
    color: var(--primary-dark);
}

.btn-start span {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Corner Play Button */
.btn-corner-play {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 20;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-corner-play:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}


/* Hide play button in fullscreen */
:fullscreen .btn-corner-play { display: none; }
:-webkit-full-screen .btn-corner-play { display: none; }
:-ms-fullscreen .btn-corner-play { display: none; }