/* ===================================
   PRESENTATION FRAMEWORK CSS
   Shared styles for all lecture slides
   =================================== */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Presentation Container */
.presentation-container {
    width: 90vw;
    height: 90vh;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

/* Slide Styles */
.slide {
    width: 100%;
    height: 100%;
    padding: 60px;
    display: none;
    flex-direction: column;
    animation: slideIn 0.5s ease-in-out;
    overflow-y: auto;
}

.slide.active {
    display: flex;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Typography */
h1 {
    color: #764ba2;
    font-size: 2.8em;
    margin-bottom: 30px;
    border-bottom: 3px solid #667eea;
    padding-bottom: 20px;
}

h2 {
    color: #667eea;
    font-size: 2.2em;
    margin-bottom: 25px;
    margin-top: 30px;
}

h3 {
    color: #764ba2;
    font-size: 1.6em;
    margin: 20px 0;
}

p, li {
    font-size: 1.2em;
    line-height: 1.7;
    color: #333;
    margin-bottom: 15px;
}

ul, ol {
    margin-left: 30px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 12px;
}

/* Code Examples */
.code-example {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    margin: 20px 0;
    font-size: 1.1em;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

.code-example .tag {
    color: #ff79c6;
}

.code-example .attribute {
    color: #50fa7b;
}

.code-example .value {
    color: #f1fa8c;
}

.code-example .content {
    color: #f8f8f2;
}

.code-example .comment {
    color: #6272a4;
}

.code-example .good {
    color: #50fa7b;
}

.code-example .bad {
    color: #ff5555;
}

/* Utility Classes */
.highlight {
    background: linear-gradient(120deg, #f093fb 0%, #f5576c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

.emoji {
    font-size: 1.3em;
    margin: 0 8px;
}

/* Box Components */
.activity-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin: 30px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.activity-box h3 {
    color: white;
    margin-bottom: 15px;
}

.activity-box p,
.activity-box li {
    color: white;
}

.visual-example {
    background: #f8f9fa;
    border: 2px dashed #667eea;
    padding: 30px;
    border-radius: 10px;
    margin: 20px 0;
}

.tip-box, .tip {
    background: #d4edda;
    border-left: 4px solid #28a745;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.warning-box, .warning {
    background: #fff3cd;
    border-left: 4px solid #ff9800;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.demo-box {
    background: #f0f4f8;
    border: 2px dashed #667eea;
    padding: 30px;
    border-radius: 15px;
    margin: 25px 0;
    text-align: center;
}

/* Layout Utilities */
.comparison-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 30px 0;
}

.comparison-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    border-top: 4px solid #667eea;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.comparison-card.bad {
    background: #ffe5e5;
    border-left: 4px solid #ff5555;
}

.comparison-card.good {
    background: #e5ffe5;
    border-left: 4px solid #50fa7b;
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 30px 0;
}

/* Navigation Controls */
.navigation {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    align-items: center;
    z-index: 100;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.slide-counter {
    font-size: 1.1em;
    color: #666;
    font-weight: bold;
}

/* Timer Display */
.timer-display {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 1.2em;
    color: #666;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 20px;
    border-radius: 20px;
}

/* Inline Code */
code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: #d63384;
}

/* Special List Styles */
.icon-list {
    list-style: none;
    margin-left: 0;
}

.icon-list li::before {
    content: "→ ";
    color: #667eea;
    font-weight: bold;
    margin-right: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .presentation-container {
        width: 100vw;
        height: 100vh;
        border-radius: 0;
    }
    
    .slide {
        padding: 30px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    h2 {
        font-size: 1.6em;
    }
    
    .comparison-table,
    .two-column {
        grid-template-columns: 1fr;
    }
    
    .navigation {
        bottom: 20px;
    }
    
    button {
        padding: 10px 20px;
        font-size: 0.9em;
    }
}