/* Presentation Slide Styling */
.presentation-slide {
    min-height: calc(100vh - 300px);
    display: flex;
    align-items: center;
    padding: 6rem 0;
    border-top: none;
}

.presentation-container {
    max-width: 900px;
}

.slide-content {
    background: rgba(107, 124, 59, 0.03);
    padding: 4rem;
    border-radius: 4px;
    border: 1px solid var(--border-light);
}

body.dark-mode .slide-content {
    background: rgba(107, 124, 59, 0.08);
    border-color: var(--border-dark);
}

.slide-content h1 {
    font-size: 3rem;
    font-weight: 400;
    margin-bottom: 1rem;
    line-height: 1.2;
    font-style: italic;
}

.slide-content h2 {
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: 1rem;
    font-style: italic;
}

.slide-subtitle {
    font-size: 1.5rem;
    color: var(--muted-light);
    font-style: italic;
    margin-bottom: 1rem;
}

body.dark-mode .slide-subtitle {
    color: var(--muted-dark);
}

.slide-intro {
    font-size: 1.25rem;
    color: var(--muted-light);
    line-height: 1.8;
}

body.dark-mode .slide-intro {
    color: var(--muted-dark);
}

.slide-spacer {
    height: 3rem;
}

.slide-spacer-small {
    height: 1.5rem;
}

.slide-text {
    font-size: 1.1rem;
    color: var(--muted-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

body.dark-mode .slide-text {
    color: var(--muted-dark);
}

.slide-text.large {
    font-size: 1.3rem;
    font-weight: 500;
}

.slide-highlight {
    background: rgba(107, 124, 59, 0.15);
    padding: 2rem;
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    margin-top: 2rem;
}

body.dark-mode .slide-highlight {
    background: rgba(107, 124, 59, 0.25);
}

.slide-highlight p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin: 0;
    font-weight: 500;
}

body.dark-mode .slide-highlight p {
    color: var(--text-dark);
}

.slide-list {
    list-style: none;
    margin: 1.5rem 0;
    padding: 0;
}

.slide-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 1rem;
    color: var(--muted-light);
    line-height: 1.6;
}

body.dark-mode .slide-list li {
    color: var(--muted-dark);
}

.slide-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Process Steps */
.slide-process {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.process-step {
    padding: 2rem;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    transition: border-color 0.3s;
}

body.dark-mode .process-step {
    border-color: var(--border-dark);
}

.process-step:hover {
    border-color: var(--accent);
}

.process-step h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    margin-top: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.dark-mode .process-step h4 {
    color: var(--text-dark);
}

.process-step p {
    font-size: 1rem;
    color: var(--muted-light);
    line-height: 1.6;
    margin: 0;
}

body.dark-mode .process-step p {
    color: var(--muted-dark);
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.comparison-item {
    padding: 2rem;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    transition: border-color 0.3s;
}

body.dark-mode .comparison-item {
    border-color: var(--border-dark);
}

.comparison-item:hover {
    border-color: var(--accent);
}

.comparison-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    margin-top: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.dark-mode .comparison-item h4 {
    color: var(--text-dark);
}

.comparison-item ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comparison-item li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 1rem;
    color: var(--muted-light);
    line-height: 1.6;
}

body.dark-mode .comparison-item li {
    color: var(--muted-dark);
}

.comparison-item li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Timeline */
.trajectory-timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 2rem;
}

.timeline-item {
    padding: 2rem;
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    transition: border-color 0.3s;
}

body.dark-mode .timeline-item {
    border-color: var(--border-dark);
    border-left-color: var(--accent);
}

.timeline-item:hover {
    border-color: var(--accent);
}

.timeline-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
    margin: 0 0 0.75rem 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.dark-mode .timeline-item h4 {
    color: var(--text-dark);
}

.timeline-item p {
    font-size: 1rem;
    color: var(--muted-light);
    line-height: 1.6;
    margin: 0;
}

body.dark-mode .timeline-item p {
    color: var(--muted-dark);
}

/* Presentation Navigation */
.presentation-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem 2rem 0;
    border: none;
    gap: 2rem;
    margin-bottom: 3rem;
}

.nav-back, .nav-next {
    flex: 1;
}

.nav-link {
    display: inline-block;
    color: var(--accent);
    text-decoration: none;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid var(--accent);
    transition: padding 0.3s;
}

.nav-back .nav-link:hover {
    padding-left: 0.5rem;
}

.nav-next .nav-link:hover {
    padding-right: 0.5rem;
}

.nav-next {
    text-align: right;
}

.slide-counter {
    flex: 0 0 auto;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.9rem;
    color: var(--muted-light);
    font-weight: 500;
}

body.dark-mode .slide-counter {
    color: var(--muted-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .presentation-slide {
        padding: 3rem 0;
        min-height: auto;
    }

    .slide-content {
        padding: 2rem;
    }

    .slide-content h1 {
        font-size: 2rem;
    }

    .slide-content h2 {
        font-size: 1.75rem;
    }

    .slide-subtitle {
        font-size: 1.1rem;
    }

    .slide-intro {
        font-size: 1.05rem;
    }

    .slide-process {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .trajectory-timeline {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .presentation-nav {
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav-back, .nav-next {
        width: 100%;
    }

    .nav-next {
        text-align: left;
    }

    .slide-counter {
        order: -1;
    }
}