/* Custom styles for the presentation with responsive REM units */

:root {
    --primary-color: #0077cc;
    --secondary-color: #005599;
    --accent-color: #ff6633;
    --text-color: #333333;
    --background-color: #ffffff;
    --icon-color: #0077cc;
    
    /* Base font size adjustments for different screen sizes - INCREASED */
    font-size: 20px; /* Default base font size increased from 16px */
}

/* Responsive base font size adjustments - INCREASED */
@media (max-width: 1200px) {
    :root {
        font-size: 18px; /* Increased from 15px */
    }
}

@media (max-width: 900px) {
    :root {
        font-size: 17px; /* Increased from 14px */
    }
}

@media (max-width: 600px) {
    :root {
        font-size: 16px; /* Increased from 13px */
    }
}

@media (max-width: 400px) {
    :root {
        font-size: 15px; /* Increased from 12px */
    }
}

.reveal {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    font-size: 1.1rem; /* Increased from 1rem */
    line-height: 1.5;
}

.reveal h1, 
.reveal h2, 
.reveal h3 {
    color: var(--primary-color);
    margin-bottom: 0.6rem;
    font-weight: 600;
    letter-spacing: -0.02rem;
    text-transform: none;
}

.reveal h1 {
    font-size: 2.6rem; /* Increased from 2.5rem */
}

.reveal h2 {
    font-size: 2rem; /* Increased from 1.8rem */
    padding-left: 0; /* Remove any leftward padding */
    padding-right: 2.5rem; /* Reduced from 3.5rem to avoid icon overlap */
    max-width: calc(100% - 3rem); /* Ensure text doesn't extend too far */
    margin-top: 2.5rem; /* Add space at top to prevent overlap with icons */
    margin-bottom: 1rem; /* Space below heading */
}

.reveal ul {
    list-style-type: none; /* Remove default bullets for custom styling */
    margin-left: 0.5rem;
    padding-left: 0;
}

.reveal li {
    margin-bottom: 0.6rem; /* Slightly increased from 0.5rem */
    line-height: 1.5;
    position: relative;
    padding-left: 1.5rem;
    font-size: 1.1rem; /* Increased from 1rem */
}

/* Custom bullet points */
.reveal li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.reveal li.level-1 {
    margin-left: 1.5rem;
    font-size: 1.05rem; /* Increased from 0.95rem */
}

.reveal li.level-1:before {
    content: "◦";
}

.reveal li.level-2 {
    margin-left: 3rem;
    font-size: 1rem; /* Increased from 0.9rem */
}

.reveal li.level-2:before {
    content: "▪";
    font-size: 0.9rem;
}

/* Title slide styling */
.title-slide h1 {
    font-size: 3rem; /* Increased from 2.8rem */
    margin-bottom: 1rem;
    padding-right: 0;
    max-width: 100%;
}

.title-slide p {
    font-size: 1.5rem; /* Increased from 1.4rem */
    margin: 0.3rem 0;
}

/* Source references */
.source-reference {
    font-size: 0.9rem; /* Increased from 0.8rem */
    font-style: italic;
    color: #666;
    margin-top: 1rem;
    text-align: right;
    max-width: 100%;
    padding-right: 0;
}

/* Icon styling - REPOSITIONED HIGHER */
.slide-icon {
    font-size: 2rem; /* Slightly smaller from 2.5rem */
    color: var(--icon-color);
    opacity: 0.6; /* More subtle */
    /* Position in top right corner */
    position: absolute;
    top: 5px; /* Moved up from 1rem */
    right: 10px;
    z-index: 10;
    /* Add subtle shadow for better visibility against any background */
    text-shadow: 0 0 0.1rem rgba(255, 255, 255, 0.8);
}

/* Hover effect */
.slide-icon:hover {
    opacity: 1;
    transform: scale(1.1);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Remove bottom positioning that was previously used */
.slide-icon {
    bottom: auto;
}

/* Fix for title slide icon */
.title-slide .slide-icon {
    font-size: 5rem;
    /* Center the icon on title slide */
    position: static;
    display: block;
    text-align: center;
    margin: 0.8rem auto 1.5rem auto;
    opacity: 0.9;
}

/* Special styling for slides with icons */
.with-icon ul {
    padding-right: 0; /* Remove side padding since icons are now at top */
}

/* Content wrapping and overflow handling with responsive height */
.reveal .slides section {
    /* Remove any borders, backgrounds, or shadows */
    background-color: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
    /* Keep the auto overflow handling */
    overflow-y: auto !important;
    max-height: 85vh;
    
    /* Add vertical centering manually */
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
}

/* For slides with excessive content that won't fit */
.reveal .slides section.content-overflow {
    justify-content: flex-start !important;
    padding-top: 1.5rem;
}

/* Improve text fitting by reducing some spacing */
.reveal ul, .reveal ol {
    margin: 0 0 0.6rem 0;
}

/* Loading animation */
.loading-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.loading-section h2 {
    font-size: 2.2rem; /* Increased size */
}

.loader {
    border: 0.3125rem solid #f3f3f3;
    border-top: 0.3125rem solid var(--primary-color);
    border-radius: 50%;
    width: 3.5rem; /* Increased from 3.125rem */
    height: 3.5rem; /* Increased from 3.125rem */
    animation: spin 2s linear infinite;
    margin-top: 1.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Navigation controls */
.reveal .controls {
    color: var(--primary-color);
}

/* Progress bar */
.reveal .progress {
    color: var(--accent-color);
    height: 0.35rem; /* Slightly increased from 0.3125rem */
}

/* Additional responsive adjustments */
@media (max-height: 600px) {
    .reveal h1 {
        font-size: 2.4rem;
    }
    
    .reveal h2 {
        font-size: 1.8rem;
    }
    
    .title-slide h1 {
        font-size: 2.6rem;
    }
    
    .slide-icon {
        font-size: 2.2rem;
    }
    
    .title-slide .slide-icon {
        font-size: 3.5rem; /* Increased from 3.2rem */
    }
}

/* Additional responsive adjustments for icons */
@media (max-width: 768px) {
    .slide-icon {
        font-size: 2.2rem;
        top: 0.8rem;
        right: 0.8rem;
    }
    
    .reveal h2 {
        padding-right: 3rem;
        max-width: calc(100% - 3.5rem);
    }
}

/* Ensure content is readable on very small devices */
@media (max-width: 480px) {
    .reveal .slides {
        padding: 0.5rem;
    }
    
    .reveal li {
        padding-left: 1rem;
    }
    
    .slide-icon {
        font-size: 1.8rem;
        top: 0.6rem;
        right: 0.6rem;
    }
    
    .title-slide .slide-icon {
        font-size: 3.5rem;
        margin-bottom: 1rem;
    }
    
    .reveal h2 {
        padding-right: 2.5rem;
        max-width: calc(100% - 3rem);
    }
}

/* Print mode adjustments */
@media print {
    .reveal .slides section {
        max-height: none !important;
        height: auto !important;
    }
    
    .reveal {
        font-size: 1rem; /* Increased from 0.95rem */
    }
}

/* Bold text for emphasis */
.reveal strong {
    font-weight: 700;
    color: var(--secondary-color);
}

/* Add elegant link styling */
.reveal a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease-in-out;
    font-weight: 500;
}

.reveal a:hover {
    border-bottom-color: var(--primary-color);
}

/* Fix vertical alignment of content within slides */
.reveal .slides section > * {
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}