:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: #1e293b;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --border-color: #334155;
    --highlight-bg: #1e3a5f;
}

[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-primary: #2563eb;
    --accent-secondary: #3b82f6;
    --card-bg: #ffffff;
    --card-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    --border-color: #d1d5db;
    --highlight-bg: #eff6ff;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    transition: background 0.3s ease, color 0.3s ease;
    width: 100vw;
    height: 100vh;
    position: fixed;
    margin: 0;
    padding: 0;
}

/* Logo */
.logo-watermark {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 999;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.logo-watermark:hover {
    opacity: 1;
}

.logo-watermark img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    transition: filter 0.3s ease;
}

.logo-main {
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
    display: block;
    object-fit: contain;
    animation: fadeIn 1s ease;
    transition: filter 0.3s ease;
}

/* Dark theme logo styling */
[data-theme="dark"] .logo-watermark img,
[data-theme="dark"] .logo-main {
    filter: brightness(0) invert(1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 10px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    font-size: 20px;
    transition: opacity 0.3s ease;
}

[data-theme="light"] .theme-toggle .sun-icon {
    opacity: 1;
}

[data-theme="light"] .theme-toggle .moon-icon {
    opacity: 0.3;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    opacity: 0.3;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    opacity: 1;
}

/* Slides Container */
.slides-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 60px 40px;
    overflow-y: auto;
    overflow-x: hidden;
}

.slide::-webkit-scrollbar {
    display: none;
}

.slide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
}

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

.slide-content {
    max-width: 1200px;
    width: 100%;
    animation: fadeInUp 0.8s ease;
}

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

/* Typography */
h1, h2, h3 {
    margin-bottom: 20px;
}

h2 {
    font-size: 2.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    text-align: center;
}

h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

p {
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Title Slide */
.title-slide {
    text-align: center;
}

.main-title {
    font-size: 3.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    animation: slideInDown 0.8s ease;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.meta-info {
    display: inline-block;
    text-align: left;
    background: var(--card-bg);
    padding: 30px 50px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.meta-info p {
    margin: 10px 0;
    font-size: 1.1rem;
}

/* Content Box */
.content-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.highlight {
    font-size: 1.3rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

.center-text {
    text-align: center;
}

.service-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 30px;
}

.service-list li {
    background: var(--highlight-bg);
    padding: 15px 25px;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Vision Grid */
.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.vision-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.vision-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* Market Landscape */
.market-subtitle {
    text-align: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 15px;
}

.market-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 40px;
}

.competitor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.competitor-card {
    background: var(--card-bg);
    padding: 35px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.competitor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.competitor-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.competitor-card h3 {
    color: var(--accent-primary);
    margin-bottom: 15px;
}

.competitor-card p {
    line-height: 1.7;
}

.key-insight-box {
    background: var(--accent-gradient);
    padding: 35px;
    border-radius: 15px;
    display: flex;
    gap: 25px;
    align-items: start;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.insight-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.insight-content h3 {
    color: white;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.insight-content p {
    color: white;
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Opportunity List */
.opportunity-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.opportunity-item {
    display: flex;
    gap: 30px;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.opportunity-item:hover {
    transform: translateX(10px);
}

.number {
    font-size: 2.5rem;
    font-weight: bold;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 60px;
}

.text h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* Proposed Solution */
.solution-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.target-market-section {
    margin-top: 30px;
}

.section-heading {
    text-align: center;
    font-size: 1.8rem;
    color: var(--accent-primary);
    margin-bottom: 30px;
}

.target-market-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.target-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.target-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.target-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.target-card h4 {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.target-card p {
    font-size: 1rem;
    line-height: 1.6;
}

/* Revenue Grid */
.projection-note {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.revenue-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.revenue-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease;
}

.revenue-card:hover {
    transform: scale(1.05);
}

.revenue-card.total {
    grid-column: 1 / -1;
    background: var(--accent-gradient);
    color: white;
}

.revenue-card.total h3,
.revenue-card.total p {
    color: white;
}

.revenue-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.stat {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-primary);
    margin: 15px 0;
}

.revenue-card.total .stat-large {
    font-size: 3.5rem;
    font-weight: bold;
    color: white;
    margin: 15px 0;
}

.revenue-amount {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-secondary);
    margin-top: 15px;
}

/* Platform Grid */
.section-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.platform-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.platform-card h3 {
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.platform-card ul {
    list-style: none;
}

.platform-card li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.platform-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* Engagement Grid */
.engagement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.engagement-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    text-align: center;
}

.engagement-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.engagement-card h3 {
    margin-bottom: 20px;
}

.engagement-card p {
    margin: 10px 0;
}

/* Timeline */
.timeline-subtitle {
    text-align: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 40px;
}

.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.timeline-item {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.timeline-item.highlight-timeline {
    border: 2px solid var(--accent-primary);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.timeline-header {
    background: var(--accent-gradient);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.timeline-quarter {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    min-width: 100px;
}

.timeline-phase {
    font-size: 1.3rem;
    font-weight: 600;
    color: white;
    flex: 1;
}

.timeline-content {
    padding: 25px 30px;
}

.timeline-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-primary);
}

/* Conclusion */
.conclusion-box {
    background: var(--card-bg);
    padding: 50px;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.highlight-large {
    font-size: 2rem;
    color: var(--accent-primary);
    font-weight: 600;
    text-align: left;
    margin-bottom: 40px;
}

.key-points {
    margin: 30px 0;
}

.point {
    display: flex;
    gap: 20px;
    align-items: start;
    margin: 20px 0;
}

.check {
    font-size: 2rem;
    color: var(--accent-primary);
    font-weight: bold;
}

.point p {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.cta {
    text-align: center;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
}

.cta p {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

/* Navigation */
.nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-size: 3rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
    box-shadow: var(--card-shadow);
}

.nav-btn:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

/* Slide Navigation Dots */
.slide-nav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 100;
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-dot.active {
    background: var(--accent-primary);
    width: 40px;
    border-radius: 6px;
}

.nav-dot:hover {
    background: var(--accent-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        overflow-x: hidden;
    }
    
    .logo-watermark {
        top: 50px;
        left: 10px;
    }
    
    .logo-watermark img {
        width: 35px;
        height: 35px;
    }
    
    .logo-main {
        width: 80px;
        height: 80px;
        margin-bottom: 20px;
    }
    
    .slide {
        padding: 70px 10px 90px 10px;
        width: 100%;
        max-width: 100vw;
    }
    
    .main-title {
        font-size: 1.8rem;
        line-height: 1.2;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .meta-info {
        padding: 20px 25px;
        width: 100%;
    }
    
    .meta-info p {
        font-size: 0.95rem;
    }
    
    h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    .content-box {
        padding: 25px 20px;
    }
    
    .highlight {
        font-size: 1.1rem;
    }
    
    .center-text {
        font-size: 0.95rem;
    }
    
    .service-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .service-list li {
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    .vision-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 20px;
    }
    
    .vision-card {
        padding: 25px;
    }
    
    .icon {
        font-size: 2.5rem;
    }
    
    .market-subtitle {
        font-size: 1.2rem;
    }
    
    .market-intro {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .competitor-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 25px;
    }
    
    .competitor-card {
        padding: 25px;
    }
    
    .competitor-icon {
        font-size: 2.5rem;
    }
    
    .competitor-card h3 {
        font-size: 1.2rem;
    }
    
    .competitor-card p {
        font-size: 0.95rem;
    }
    
    .key-insight-box {
        flex-direction: column;
        padding: 25px;
        gap: 15px;
    }
    
    .insight-icon {
        font-size: 2.5rem;
    }
    
    .insight-content h3 {
        font-size: 1.2rem;
    }
    
    .insight-content p {
        font-size: 0.95rem;
    }
    
    .opportunity-list {
        gap: 15px;
    }
    
    .opportunity-item {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
    }
    
    .number {
        font-size: 2rem;
        min-width: auto;
    }
    
    .text h3 {
        font-size: 1.1rem;
    }
    
    .text p {
        font-size: 0.95rem;
    }
    
    .solution-intro {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .section-heading {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }
    
    .target-market-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .target-card {
        padding: 20px;
    }
    
    .target-icon {
        font-size: 2.5rem;
    }
    
    .target-card h4 {
        font-size: 1.1rem;
    }
    
    .target-card p {
        font-size: 0.95rem;
    }
    
    .projection-note {
        font-size: 0.95rem;
    }
    
    .revenue-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .revenue-card {
        padding: 25px;
    }
    
    .revenue-icon {
        font-size: 2.5rem;
    }
    
    .stat {
        font-size: 2rem;
    }
    
    .revenue-card.total .stat-large {
        font-size: 2.5rem;
    }
    
    .revenue-amount {
        font-size: 1.2rem;
    }
    
    .section-intro {
        font-size: 1rem;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .platform-card {
        padding: 25px;
    }
    
    .platform-card h3 {
        font-size: 1.3rem;
    }
    
    .platform-card li {
        font-size: 0.95rem;
        padding: 10px 0;
        padding-left: 25px;
    }
    
    .engagement-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .engagement-card {
        padding: 25px;
    }
    
    .engagement-icon {
        font-size: 2.5rem;
    }
    
    .engagement-card h3 {
        font-size: 1.2rem;
    }
    
    .engagement-card p {
        font-size: 0.95rem;
    }
    
    .timeline-subtitle {
        font-size: 1.2rem;
        margin-bottom: 25px;
    }
    
    .timeline-container {
        gap: 20px;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 20px;
        gap: 10px;
    }
    
    .timeline-quarter {
        font-size: 1.2rem;
        min-width: auto;
    }
    
    .timeline-phase {
        font-size: 1.1rem;
    }
    
    .timeline-content {
        padding: 20px;
    }
    
    .timeline-content p {
        font-size: 0.95rem;
    }
    
    .conclusion-box {
        padding: 25px;
    }
    
    .highlight-large {
        font-size: 1.3rem;
    }
    
    .point {
        gap: 15px;
    }
    
    .check {
        font-size: 1.5rem;
    }
    
    .point p {
        font-size: 1rem;
    }
    
    .cta p {
        font-size: 1.2rem;
    }
    
    .nav-btn {
        width: 35px;
        height: 35px;
        font-size: 1.3rem;
        border-width: 1px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .prev {
        left: 3px;
    }
    
    .next {
        right: 3px;
    }
    
    .theme-toggle {
        top: 5px;
        right: 5px;
        padding: 6px 10px;
        border-width: 1px;
        gap: 5px;
    }
    
    .theme-toggle .sun-icon,
    .theme-toggle .moon-icon {
        font-size: 16px;
    }
    
    .slide-nav {
        bottom: 15px;
        gap: 8px;
        padding: 0 10px;
        max-width: calc(100vw - 20px);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-dot {
        width: 8px;
        height: 8px;
    }
    
    .nav-dot.active {
        width: 24px;
    }
    
    .slide-content {
        max-width: 100%;
        width: 100%;
    }
    
    .content-box,
    .vision-card,
    .competitor-card,
    .opportunity-item,
    .revenue-card,
    .target-card,
    .platform-card,
    .engagement-card,
    .timeline-item,
    .conclusion-box {
        max-width: 100%;
        box-sizing: border-box;
    }
}