:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #161c2d;
    --bg-card: rgba(22, 28, 45, 0.6);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-primary: #6366f1; /* Indigo */
    --color-primary-glow: rgba(99, 102, 241, 0.15);
    --color-secondary: #ec4899; /* Pink */
    --color-accent: #f59e0b; /* Amber */
    --color-success: #10b981; /* Emerald */
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --glass-blur: blur(12px);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --border-color: rgba(0, 0, 0, 0.06);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #4f46e5;
    --color-primary-glow: rgba(79, 70, 229, 0.1);
    --color-secondary: #db2777;
    --color-accent: #d97706;
    --color-success: #059669;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Background Gradients */
.bg-glow-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.bg-glow-1 {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
    filter: blur(80px);
}
.bg-glow-2 {
    position: absolute;
    bottom: -10%;
    right: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
    filter: blur(100px);
}

/* Navigation / Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(var(--bg-primary), 0.8);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-group h1 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Slide Presentation Container */
main {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 160px);
}

/* Slide Framework */
.slide-deck {
    position: relative;
    width: 100%;
}

.slide {
    display: none;
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.slide.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cover Slide specific style */
.cover-layout {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
    padding: 3rem 0;
}

@media (max-width: 968px) {
    .cover-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

.cover-content h2 {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -1.5px;
}

.cover-content h2 span {
    background: linear-gradient(135deg, var(--color-primary) 30%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cover-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary) 50%, var(--color-secondary) 100%);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.theme-toggle, .btn-icon {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.theme-toggle:hover, .btn-icon:hover {
    background: var(--border-color);
    transform: scale(1.05);
}

/* Glassmorphism Card style */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--bg-card-hover);
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
}

/* Deck Control Panel */
.presentation-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
}

.slide-indicators {
    display: flex;
    gap: 0.5rem;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.indicator.active {
    background: var(--color-primary);
    width: 28px;
    border-radius: 10px;
}

/* Dashboard / Data view layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Title descriptions and slide headers */
.slide-header {
    margin-bottom: 2.5rem;
}

.slide-header h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.slide-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Grid listings filter */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

.listing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    max-height: 520px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.listing-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.listing-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(30, 41, 59, 0.6);
}

.card-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.badge {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-bestseller {
    background: var(--color-accent);
    color: #0b0f19;
}

.badge-popular {
    background: var(--color-secondary);
    color: #ffffff;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-primary);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.card-price {
    font-weight: 700;
    color: var(--color-success);
    font-size: 1.1rem;
}

.card-reviews {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.card-tags {
    margin-top: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.tag {
    font-size: 0.65rem;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.tag-niche {
    border-left: 2px solid var(--color-primary);
}

.tag-style {
    border-left: 2px solid var(--color-secondary);
}

/* Charts & Stats visual design */
.stats-cards-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .stats-cards-container {
        grid-template-columns: 1fr;
    }
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 18px;
}

.stat-val {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-lbl {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.chart-container {
    position: relative;
    height: 320px;
    width: 100%;
}

/* Table Style for Slide 2 */
.analysis-table-container {
    overflow-x: auto;
    margin-top: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 1rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    font-weight: 700;
}

td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Insights grid */
.insights-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

@media (max-width: 768px) {
    .insights-container {
        grid-template-columns: 1fr;
    }
}

.insight-block {
    background: rgba(255,255,255,0.02);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.insight-block h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.insight-list {
    list-style: none;
}

.insight-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.insight-list li strong {
    color: var(--text-primary);
}

.insight-list li::before {
    content: "✦";
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* Footer style */
footer {
    text-align: center;
    padding: 3rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}