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

body {
    font-family: Arial, sans-serif;
    background: #111;
    color: #fff;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* CONTROLES DE NAVEGACIÓN */
.controls-top-bar {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    gap: 10px;
    align-items: center;
    background: rgba(17, 17, 17, 0.9);
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid #4db8ff;
}

.controls-bottom-bar {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    gap: 10px;
    align-items: center;
    background: rgba(17, 17, 17, 0.9);
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid #4db8ff;
}

.controls-top,
.controls-bottom {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-nav {
    background: #4db8ff;
    color: #111;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-nav:hover {
    background: #2d9fd9;
    transform: scale(1.05);
}

.btn-index {
    background: #ff6b6b;
    color: #fff;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-index:hover {
    background: #ff5252;
    transform: scale(1.05);
}

.slide-counter {
    color: #4db8ff;
    font-weight: bold;
    font-size: 0.95em;
    min-width: 50px;
}

section {
    height: 100vh;
    padding: 60px;
    box-sizing: border-box;
    position: relative;
    z-index: 2;
    display: none;
}

section.active {
    display: flex;
}

h1, h2 {
    color: #4db8ff;
}

.slide {
    flex-direction: column;
    justify-content: center;
}

.center {
    text-align: center;
}

.big {
    font-size: 2.5em;
}

ul {
    font-size: 1.4em;
    line-height: 1.8em;
    margin-left: 30px;
}

ul ul {
    font-size: 0.85em;
    margin-top: 10px;
}

/* CLASES DE TAMAÑO DE FUENTE */
.text-small {
    font-size: 0.95em;
}

.text-medium {
    font-size: 1em;
}

.text-large {
    font-size: 1.1em;
}

.text-xlarge {
    font-size: 1.2em;
}

/* LISTA DE INDICE EN COLUMNAS */
.index-list {
    columns: 2;
    column-gap: 40px;
    list-style: none;
}

code {
    background-color: #222;
    padding: 3px 8px;
    border-radius: 3px;
    color: #ffcc00;
    font-family: 'Courier New', monospace;
}

h2 {
    font-size: 1.3em;
    margin-top: 25px;
    margin-bottom: 15px;
}

/* ENLACES DE ÍNDICE */
.index-list {
    list-style: none;
}

.index-link {
    color: #4db8ff;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.index-link:hover {
    color: #ff6b6b;
    text-decoration: underline;
    transform: translateX(10px);
}

/* CONTENIDO DE SLIDES CON IMAGEN */
.slide-content {
    display: flex;
    gap: 40px;
    align-items: center;
    justify-content: space-between;
}

.slide-text {
    flex: 1;
    min-width: 50%;
}

.slide-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 400px;
}

.slide-image img {
    max-width: 100%;
    max-height: 1000px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(77, 184, 255, 0.3);
    transition: transform 0.3s ease;
}

.slide-image img:hover {
    transform: scale(1.05);
}

/* ESTILOS PARA EMOJIS COMO IMÁGENES */
.emoji-icon {
    font-size: 200px;
    line-height: 1;
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

/* ENLACES DE BIBLIOGRAFÍA */
.bibliography-link {
    color: #4db8ff;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: bold;
}

.bibliography-link:hover {
    color: #ff6b6b;
    text-decoration: underline;
    transform: scale(1.05);
}

/* FOOTER */
.footer-text {
    margin-top: 60px;
    font-size: 0.9em;
    color: #aaa;
}

.danger-symbol {
    font-size: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 1s infinite;
}

.success-symbol {
    font-size: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: float 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.author-section {
    margin-top: 60px;
}

.question-text {
    font-size: 2.5em;
    animation: pulse 1s infinite;
}

/* ANIMACIONES */
section {
    animation: fadeIn 0.5s ease-in;
}

/* FUEGOS ARTIFICIALES */
.firework {
    position: fixed;
    pointer-events: none;
    z-index: 999;
    animation: fireworkBurst 2s ease-out forwards;
}

.clap-emoji {
    position: fixed;
    pointer-events: none;
    z-index: 999;
    animation: clapFloat 3s ease-in forwards;
}

@keyframes fireworkBurst {
    0% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
    100% {
        opacity: 0;
        transform: scale(0.1) translateY(-100px) rotate(360deg);
    }
}

@keyframes clapFloat {
    0% {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translateY(-150px) rotate(45deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* RESPONSIVE DESIGN */
@media (max-width: 1200px) {
    .slide-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .slide-text {
        min-width: 100%;
    }
    
    .slide-image {
        min-width: 100%;
    }
    
    .slide-image img {
        max-height: 250px;
    }
    
    ul {
        font-size: 1.2em;
    }
}