/* ══════════════════════════════════════════════════════════════ PALETA DE COLORES UTN ══════════════════════════════════════════════════════════════ */ 
:root { 
    --utn-purple-dark: #4a148c; 
    --utn-purple-main: #6a1b9a; 
    --utn-purple-medium: #8e24aa; 
    --utn-purple-light: #ab47bc; 
    --utn-purple-soft: #e1bee7; 
    --utn-lilac-light: #f3e5f5; 
} 

/* ══════════════════════════════════════════════════════════════ RESET Y CONFIGURACIÓN BASE ══════════════════════════════════════════════════════════════ */ 
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
} 

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    background: linear-gradient(-45deg, 
        #4a148c, 
        #6a1b9a, 
        #8e24aa, 
        #ab47bc,
        #ce93d8,
        #ab47bc,
        #8e24aa,
        #6a1b9a);
    background-size: 400% 400%;
    animation: gradientWave 18s ease infinite;
    min-height: 100vh; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    padding: 20px; 
    position: relative; 
    overflow-x: hidden; 
}

@keyframes gradientWave {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
} 

/* ═══════════════════════════════════════════════════════════════ ✨ ANIMACIONES DE FONDO FLASHERAS ✨ ═══════════════════════════════════════════════════════════════ */ 
body::before { 
    content: ''; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: radial-gradient(circle at 20% 30%, rgba(171, 71, 188, 0.25) 0%, transparent 30%), 
                radial-gradient(circle at 80% 70%, rgba(142, 36, 170, 0.25) 0%, transparent 30%), 
                radial-gradient(circle at 50% 50%, rgba(106, 27, 154, 0.2) 0%, transparent 30%), 
                radial-gradient(circle at 10% 80%, rgba(171, 71, 188, 0.2) 0%, transparent 25%), 
                radial-gradient(circle at 90% 20%, rgba(142, 36, 170, 0.2) 0%, transparent 25%); 
    background-size: 100% 100%; 
    animation: gradientShift 10s ease-in-out infinite; 
    pointer-events: none; 
} 

@keyframes gradientShift { 
    0%, 100% { 
        transform: translate(0, 0) scale(1); 
        opacity: 1; 
    } 
    25% { 
        transform: translate(3%, 3%) scale(1.03); 
        opacity: 0.95; 
    } 
    50% { 
        transform: translate(-3%, 3%) scale(1.05); 
        opacity: 1; 
    } 
    75% { 
        transform: translate(3%, -3%) scale(1.03); 
        opacity: 0.95; 
    } 
} 

/* Partículas flotantes sutiles pero visibles */ 
body::after { 
    content: ''; 
    position: fixed; 
    top: -50%; 
    left: -50%; 
    width: 200%; 
    height: 200%; 
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.4) 1.5px, transparent 1.5px), 
                      radial-gradient(circle, rgba(255, 255, 255, 0.3) 1px, transparent 1px), 
                      radial-gradient(circle, rgba(255, 255, 255, 0.5) 2px, transparent 2px), 
                      radial-gradient(circle, rgba(255, 255, 255, 0.35) 1px, transparent 1px); 
    background-size: 250px 250px, 180px 180px, 300px 300px, 220px 220px; 
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px; 
    animation: particlesFloat 12s linear infinite; 
    pointer-events: none; 
} 

@keyframes particlesFloat { 
    0% { 
        transform: translate(0, 0); 
    } 
    100% { 
        transform: translate(-40px, -40px); 
    } 
} 

/* ══════════════════════════════════════════════════════════════ CONTAINER PRINCIPAL CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.container { 
    background: white; 
    border-radius: 20px; 
    padding: 40px; 
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
                0 0 80px rgba(171, 71, 188, 0.3), 
                inset 0 1px 0 rgba(255, 255, 255, 0.6); 
    max-width: 1200px; 
    width: 100%; 
    position: relative; 
    overflow: visible; 
    animation: containerPulse 8s ease-in-out infinite; 
} 

@keyframes containerPulse { 
    0%, 100% { 
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
                    0 0 80px rgba(171, 71, 188, 0.3), 
                    inset 0 1px 0 rgba(255, 255, 255, 0.6); 
    } 
    50% { 
        box-shadow: 0 25px 70px rgba(0, 0, 0, 0.6), 
                    0 0 100px rgba(171, 71, 188, 0.5), 
                    inset 0 1px 0 rgba(255, 255, 255, 0.8); 
    } 
} 

/* ══════════════════════════════════════════════════════════════ TITLE HEADER CON BANNER UTN INTEGRADO Y EFECTOS ══════════════════════════════════════════════════════════════ */ 
.title-header { 
    position: relative; 
    margin: -40px -40px 20px -40px; 
    padding: 30px 40px 20px 40px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    min-height: 100px; 
    overflow: hidden; 
} 

/* Efecto de brillo animado detrás del header */ 
.title-header::before { 
    content: ''; 
    position: absolute; 
    top: -50%; 
    left: -50%; 
    width: 200%; 
    height: 200%; 
    background: linear-gradient( 
        45deg, 
        transparent 30%, 
        rgba(255, 255, 255, 0.1) 50%, 
        transparent 70% 
    ); 
    animation: headerShine 3s ease-in-out infinite; 
    pointer-events: none; 
} 

@keyframes headerShine { 
    0% { 
        transform: translateX(-100%) translateY(-100%) rotate(45deg); 
    } 
    100% { 
        transform: translateX(100%) translateY(100%) rotate(45deg); 
    } 
} 

.utn-banner { 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 280px; 
    height: 160px; 
    background: linear-gradient(135deg, var(--utn-purple-dark) 0%, var(--utn-purple-main) 100%); 
    clip-path: polygon(0 0, 100% 0, 0 100%); 
    display: flex; 
    align-items: flex-start; 
    justify-content: flex-start; 
    padding: 20px; 
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2), 
                0 0 20px rgba(106, 27, 154, 0.4); 
    animation: bannerGlow 4s ease-in-out infinite; 
} 

@keyframes bannerGlow { 
    0%, 100% { 
        box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2), 
                    0 0 20px rgba(106, 27, 154, 0.4); 
    } 
    50% { 
        box-shadow: 3px 3px 15px rgba(0, 0, 0, 0.3), 
                    0 0 30px rgba(106, 27, 154, 0.6); 
    } 
} 

.utn-logo { 
    width: 157px; 
    height: auto; 
    object-fit: contain; 
    transform: rotate(0deg); 
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2)); 
    transition: all 0.3s ease; 
} 

.utn-logo:hover { 
    transform: scale(1.05); 
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3)); 
} 

.title-content { 
    flex: 1; 
    text-align: center; 
} 

.fmt-logo-container { 
    position: absolute; 
    top: 20px; 
    right: 20px; 
    animation: logoFloat 3s ease-in-out infinite; 
} 

@keyframes logoFloat { 
    0%, 100% { 
        transform: translateY(0px); 
    } 
    50% { 
        transform: translateY(-5px); 
    } 
} 

.fmt-logo { 
    height: 70px; 
    width: auto; 
    object-fit: contain; 
    opacity: 0.95; 
    transition: all 0.3s ease; 
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.15)); 
} 

.fmt-logo:hover { 
    opacity: 1; 
    transform: scale(1.1); 
    filter: drop-shadow(0 4px 12px rgba(106, 27, 154, 0.4)); 
} 

h1 { 
    text-align: center; 
    color: var(--utn-purple-dark); 
    margin-bottom: 10px; 
    font-size: 2.5em; 
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
    animation: titlePulse 3s ease-in-out infinite; 
} 

@keyframes titlePulse { 
    0%, 100% { 
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
    } 
    50% { 
        text-shadow: 0 2px 8px rgba(106, 27, 154, 0.3); 
    } 
} 

h2 { 
    text-align: center; 
    color: var(--utn-purple-main); 
    margin-bottom: 5px; 
    font-size: 1em; 
} 

.subtitle { 
    text-align: center; 
    color: #666; 
    margin-bottom: 30px; 
    font-size: 1.1em; 
} 

/* ══════════════════════════════════════════════════════════════ SELECTOR DE TEMA (GEOMETRÍA / FUNCIONES) ══════════════════════════════════════════════════════════════ */ 
.theme-selector { 
    display: flex; 
    justify-content: center; 
    margin-bottom: 20px; 
} 

.theme-toggle-btn { 
    background: linear-gradient(135deg, var(--utn-purple-main) 0%, var(--utn-purple-medium) 100%); 
    color: white; 
    border: none; 
    border-radius: 25px; 
    padding: 10px 24px; 
    font-size: 1em; 
    font-weight: 600; 
    cursor: pointer; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    transition: all 0.3s ease; 
    box-shadow: 0 4px 15px rgba(106, 27, 154, 0.3); 
    position: relative; 
    overflow: hidden; 
} 

/* Efecto de brillo en el botón */ 
.theme-toggle-btn::before { 
    content: ''; 
    position: absolute; 
    top: -50%; 
    left: -50%; 
    width: 200%; 
    height: 200%; 
    background: linear-gradient( 
        45deg, 
        transparent 30%, 
        rgba(255, 255, 255, 0.2) 50%, 
        transparent 70% 
    ); 
    transform: translateX(-100%) rotate(45deg); 
    transition: transform 0.6s ease; 
    pointer-events: none; 
} 

.theme-toggle-btn:hover::before { 
    transform: translateX(100%) rotate(45deg); 
} 

.theme-toggle-btn:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 6px 20px rgba(106, 27, 154, 0.4); 
    background: linear-gradient(135deg, var(--utn-purple-dark) 0%, var(--utn-purple-main) 100%); 
} 

.theme-toggle-btn:active { 
    transform: translateY(0); 
} 

.theme-icon { 
    font-size: 1.3em; 
    animation: iconRotate 4s linear infinite; 
} 

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

.theme-text { 
    font-weight: 600; 
    position: relative; 
} 

/* ══════════════════════════════════════════════════════════════ ESTILOS PARA MODO FUNCIONES ══════════════════════════════════════════════════════════════ */ 
.function-card-wrapper { 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center; 
    gap: 10px; 
    padding: 15px; 
} 

.function-icon {  
    font-size: 2.5em; 
    margin-bottom: 5px; 
    animation: iconPop 4s ease-in-out infinite; 
}

@keyframes iconPop {
    0%, 80%, 100% {
        transform: scale(1);
    }
    90% {
        transform: scale(1.25) rotate(-4deg);
    }
    95% {
        transform: scale(1.1) rotate(3deg);
    }
}


@keyframes iconBounce { 
    0%, 100% { 
        transform: translateY(0) scale(1); 
    } 
    50% { 
        transform: translateY(-3px) scale(1.05); 
    } 
} 

.function-name { 
    font-size: 0.95em; 
    font-weight: 600; 
    color: var(--utn-purple-dark); 
    text-align: center; 
    line-height: 1.3; 
} 

/* ══════════════════════════════════════════════════════════════ SELECTOR DE MODO ══════════════════════════════════════════════════════════════ */ 
.mode-selector-wrap { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 10px; 
    margin-bottom: 18px; 
} 

.mode-selector-wrap label { 
    font-size: 0.95em; 
    color: #555; 
    font-weight: 600; 
} 

.mode-selector-wrap select { 
    appearance: none; 
    -webkit-appearance: none; 
    background: linear-gradient(135deg, #f5f7fa 0%, var(--utn-lilac-light) 100%); 
    border: 2px solid var(--utn-purple-main); 
    border-radius: 8px; 
    padding: 6px 32px 6px 14px; 
    font-size: 0.95em; 
    font-weight: 600; 
    color: var(--utn-purple-dark); 
    cursor: pointer; 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a148c' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); 
    background-repeat: no-repeat; 
    background-position: right 10px center; 
    transition: all 0.3s ease; 
} 

.mode-selector-wrap select:hover { 
    border-color: var(--utn-purple-dark); 
    box-shadow: 0 2px 8px rgba(106, 27, 154, 0.2); 
} 

.mode-selector-wrap select:focus { 
    outline: none; 
    box-shadow: 0 0 0 3px rgba(106, 27, 154, 0.25); 
} 

.mode-badge { 
    display: inline-block; 
    font-size: 0.72em; 
    font-weight: 700; 
    letter-spacing: 0.5px; 
    padding: 2px 8px; 
    border-radius: 20px; 
    background: #eee; 
    color: #888; 
    transition: all 0.3s ease; 
    animation: badgePulse 2s ease-in-out infinite; 
} 

@keyframes badgePulse { 
    0%, 100% { 
        transform: scale(1); 
    } 
    50% { 
        transform: scale(1.05); 
    } 
} 

.mode-badge.practice { 
    background: linear-gradient(135deg, #fff3e0, #ffe0b2); 
    color: #E6501B; 
} 

.mode-badge.classic { 
    background: linear-gradient(135deg, #f5f7fa, #e8eaed); 
    color: #666; 
} 

/* ══════════════════════════════════════════════════════════════ SCOREBOARD (MODO CLASSIC) CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.scoreboard { 
    display: flex; 
    justify-content: space-around; 
    margin-bottom: 30px; 
    padding: 20px; 
    background: linear-gradient(135deg, var(--utn-lilac-light) 0%, white 100%); 
    border-radius: 15px; 
    position: relative; 
    overflow: hidden; 
    box-shadow: 0 4px 15px rgba(106, 27, 154, 0.1); 
} 

/* Efecto de onda en el scoreboard */ 
.scoreboard::before { 
    content: ''; 
    position: absolute; 
    top: -50%; 
    left: -50%; 
    width: 200%; 
    height: 200%; 
    background: radial-gradient( 
        circle, 
        rgba(171, 71, 188, 0.05) 0%, 
        transparent 50% 
    ); 
    animation: waveEffect 4s linear infinite; 
    pointer-events: none; 
} 

@keyframes waveEffect { 
    0% { 
        transform: translate(0, 0) scale(1); 
    } 
    100% { 
        transform: translate(10%, 10%) scale(1.2); 
    } 
} 

.score-item { 
    text-align: center; 
    position: relative; 
} 

.score-label { 
    font-size: 0.9em; 
    color: #666; 
    margin-bottom: 5px; 
} 

.score-value { 
    font-size: 2em; 
    font-weight: bold; 
    color: var(--utn-purple-main); 
    text-shadow: 0 2px 4px rgba(106, 27, 154, 0.2); 
    transition: all 0.3s ease; 
} 

.score-value:hover { 
    transform: scale(1.1); 
    text-shadow: 0 4px 8px rgba(106, 27, 154, 0.3); 
} 

.streak-value { 
    font-size: 2em; 
    font-weight: bold; 
    color: var(--utn-purple-medium); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 8px; 
} 

.fire-emoji { 
    font-size: 1.2em; 
    animation: fireFlicker 1.5s infinite; 
} 

@keyframes fireFlicker { 
    0%, 100% { 
        transform: scale(1) rotate(-5deg); 
        filter: brightness(1); 
    } 
    25% { 
        transform: scale(1.2) rotate(5deg); 
        filter: brightness(1.2); 
    } 
    50% { 
        transform: scale(1.1) rotate(-3deg); 
        filter: brightness(1.1); 
    } 
    75% { 
        transform: scale(1.15) rotate(3deg); 
        filter: brightness(1.15); 
    } 
} 

/* ══════════════════════════════════════════════════════════════ GAME BOARD (MODO CLASSIC) ══════════════════════════════════════════════════════════════ */ 
.game-board { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 30px; 
    margin-bottom: 30px; 
    position: relative; 
} 

.cards-section { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 12px; 
} 

.section-title { 
    font-size: 1.3em; 
    font-weight: bold; 
    color: white; 
    text-align: center; 
    margin-bottom: 10px; 
    padding: 10px; 
    background: linear-gradient(135deg, var(--utn-purple-dark) 0%, var(--utn-purple-main) 100%); 
    border-radius: 10px; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    position: relative; 
    overflow: hidden; 
} 

/* Efecto de pulso en los títulos de sección */ 
.section-title::before { 
    content: ''; 
    position: absolute; 
    top: 50%; 
    left: 50%; 
    width: 0; 
    height: 0; 
    border-radius: 50%; 
    background: rgba(255, 255, 255, 0.2); 
    transform: translate(-50%, -50%); 
    transition: width 0.6s ease, height 0.6s ease; 
    pointer-events: none; 
} 

.section-title:hover::before { 
    width: 300px; 
    height: 300px; 
} 

.section-title:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 5px 15px rgba(106, 27, 154, 0.4); 
    background: linear-gradient(135deg, var(--utn-purple-main) 0%, var(--utn-purple-light) 100%); 
} 

.section-title::after { 
    content: '👁️'; 
    margin-left: 10px; 
    font-size: 0.9em; 
    animation: eyeBlink 3s ease-in-out infinite; 
} 

@keyframes eyeBlink { 
    0%, 90%, 100% { 
        opacity: 1; 
    } 
    95% { 
        opacity: 0; 
    } 
} 

/* ══════════════════════════════════════════════════════════════ CARDS CON EFECTOS MEJORADOS ══════════════════════════════════════════════════════════════ */ 
.card { 
    background: white; 
    border: 3px solid #e0e0e0; 
    border-radius: 12px; 
    padding: 15px; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    height: 100px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    position: relative; 
    overflow: hidden; 
} 

/* Efecto de brillo en hover de las cards */ 
.card::before { 
    content: ''; 
    position: absolute; 
    top: -50%; 
    left: -50%; 
    width: 200%; 
    height: 200%; 
    background: linear-gradient( 
        45deg, 
        transparent 30%, 
        rgba(171, 71, 188, 0.1) 50%, 
        transparent 70% 
    ); 
    transform: translateX(-100%) translateY(-100%) rotate(45deg); 
    transition: transform 0.6s ease; 
    pointer-events: none; 
} 

.card:hover::before { 
    transform: translateX(0) translateY(0) rotate(45deg); 
} 

.card:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 10px 25px rgba(106, 27, 154, 0.3), 
                0 0 20px rgba(171, 71, 188, 0.2); 
    border-color: var(--utn-purple-light); 
} 

.card.selected { 
    border-color: var(--utn-purple-main); 
    background: var(--utn-lilac-light); 
    transform: scale(1.05); 
    animation: cardPulse 0.6s ease-in-out; 
} 

@keyframes cardPulse { 
    0%, 100% { 
        transform: scale(1.05); 
    } 
    50% { 
        transform: scale(1.08); 
    } 
} 

.card.matched { 
    border-color: #4caf50; 
    background: #e8f5e9; 
    opacity: 0.7; 
    cursor: not-allowed; 
    animation: matchSuccess 0.5s ease-out; 
} 

@keyframes matchSuccess { 
    0% { 
        transform: scale(1); 
    } 
    50% { 
        transform: scale(1.1) rotate(2deg); 
    } 
    100% { 
        transform: scale(1) rotate(0deg); 
    } 
} 

.card.wrong { 
    animation: shakeIntense 0.5s; 
    border-color: #E6501B; 
} 

@keyframes shakeIntense { 
    0%, 100% { 
        transform: translateX(0) rotate(0deg); 
    } 
    10%, 30%, 50%, 70%, 90% { 
        transform: translateX(-10px) rotate(-2deg); 
    } 
    20%, 40%, 60%, 80% { 
        transform: translateX(10px) rotate(2deg); 
    } 
} 

.formula-content { 
    font-size: 0.95em; 
    text-align: center; 
    width: 100%; 
    position: relative; 
} 

.figure-content { 
    display: flex; 
    flex-direction: row; 
    align-items: center; 
    justify-content: center; 
    gap: 15px; 
    width: 100%; 
    position: relative; 
} 

.figure-name { 
    font-weight: bold; 
    color: #280905; 
    font-size: 1em; 
    min-width: 120px; 
} 

svg { 
    width: 50px; 
    height: 50px; 
    flex-shrink: 0; 
    transition: transform 0.3s ease; 
} 

.card:hover svg { 
    transform: scale(1.1) rotate(5deg); 
} 

/* ══════════════════════════════════════════════════════════════ BUTTONS CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.buttons { 
    text-align: center; 
    margin-top: 30px; 
} 

button { 
    background: linear-gradient(135deg, var(--utn-purple-main) 0%, var(--utn-purple-medium) 100%); 
    color: white; 
    border: none; 
    border-radius: 10px; 
    padding: 12px 30px; 
    font-size: 1em; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    box-shadow: 0 4px 15px rgba(106, 27, 154, 0.3); 
    position: relative; 
    overflow: hidden; 
} 

button::before { 
    content: ''; 
    position: absolute; 
    top: 50%; 
    left: 50%; 
    width: 0; 
    height: 0; 
    border-radius: 50%; 
    background: rgba(255, 255, 255, 0.3); 
    transform: translate(-50%, -50%); 
    transition: width 0.6s ease, height 0.6s ease; 
    pointer-events: none; 
} 

button:hover::before { 
    width: 300px; 
    height: 300px; 
} 

button:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 6px 20px rgba(106, 27, 154, 0.4); 
} 

button:active { 
    transform: translateY(0); 
} 

/* ══════════════════════════════════════════════════════════════ SUCCESS MESSAGE CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.success-message { 
    text-align: center; 
    font-size: 1.5em; 
    color: #4caf50; 
    margin: 30px 0; 
    padding: 20px; 
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%); 
    border-radius: 15px; 
    display: none; 
    animation: successAppear 0.6s ease-out; 
    position: relative; 
    overflow: hidden; 
} 

@keyframes successAppear { 
    0% { 
        opacity: 0; 
        transform: scale(0.8); 
    } 
    50% { 
        transform: scale(1.05); 
    } 
    100% { 
        opacity: 1; 
        transform: scale(1); 
    } 
} 

/* Confetti effect */ 
.success-message::before { 
    content: '🎊'; 
    position: absolute; 
    top: 10px; 
    left: 10px; 
    font-size: 2em; 
    animation: confettiSpin 2s linear infinite; 
    pointer-events: none; 
} 

.success-message::after { 
    content: '🎊'; 
    position: absolute; 
    top: 10px; 
    right: 10px; 
    font-size: 2em; 
    animation: confettiSpin 2s linear infinite reverse; 
    pointer-events: none; 
} 

@keyframes confettiSpin { 
    0% { 
        transform: rotate(0deg) scale(1); 
    } 
    50% { 
        transform: rotate(180deg) scale(1.2); 
    } 
    100% { 
        transform: rotate(360deg) scale(1); 
    } 
} 

/* ══════════════════════════════════════════════════════════════ TIP TOAST CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.tip-toast { 
    position: fixed; 
    bottom: 30px; 
    right: 30px; 
    background: white; 
    border-radius: 15px; 
    padding: 20px; 
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3), 
                0 0 30px rgba(106, 27, 154, 0.2); 
    max-width: 350px; 
    display: none; 
    z-index: 1000; 
    animation: toastSlideIn 0.4s ease-out; 
    overflow: hidden; 
} 

@keyframes toastSlideIn { 
    0% { 
        transform: translateX(400px); 
        opacity: 0; 
    } 
    100% { 
        transform: translateX(0); 
        opacity: 1; 
    } 
} 

.tip-toast::before { 
    content: ''; 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: linear-gradient( 
        135deg, 
        rgba(171, 71, 188, 0.05) 0%, 
        transparent 100% 
    ); 
    pointer-events: none; 
} 

.tip-toast-icon { 
    font-size: 2em; 
    margin-bottom: 10px; 
    animation: iconWiggle 1s ease-in-out infinite; 
} 

@keyframes iconWiggle { 
    0%, 100% { 
        transform: rotate(0deg); 
    } 
    25% { 
        transform: rotate(-10deg); 
    } 
    75% { 
        transform: rotate(10deg); 
    } 
} 

.tip-toast-label { 
    font-weight: bold; 
    color: var(--utn-purple-main); 
    margin-bottom: 5px; 
} 

.tip-toast-figure { 
    font-size: 1.1em; 
    font-weight: 600; 
    color: var(--utn-purple-dark); 
    margin-bottom: 8px; 
} 

.tip-toast-text { 
    color: #666; 
    line-height: 1.5; 
} 

.tip-toast-bar { 
    position: absolute; 
    bottom: 0; 
    left: 0; 
    height: 4px; 
    background: linear-gradient(90deg, var(--utn-purple-main), var(--utn-purple-light)); 
    width: 100%; 
    transform-origin: left; 
    animation: barShrink 5s linear; 
} 

@keyframes barShrink { 
    from { 
        transform: scaleX(1); 
    } 
    to { 
        transform: scaleX(0); 
    } 
} 

/* ══════════════════════════════════════════════════════════════ PRACTICE VIEW ══════════════════════════════════════════════════════════════ */ 
.practice-view { 
    display: none; 
} 

.practice-header { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 12px; 
    margin-bottom: 20px; 
    flex-wrap: wrap; 
} 

.practice-header-label { 
    font-size: 0.95em; 
    font-weight: 600; 
    color: #555; 
} 

.difficulty-select { 
    appearance: none; 
    -webkit-appearance: none; 
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%); 
    border: 2px solid #E6501B; 
    border-radius: 8px; 
    padding: 6px 32px 6px 14px; 
    font-size: 0.95em; 
    font-weight: 600; 
    color: #E6501B; 
    cursor: pointer; 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23E6501B' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); 
    background-repeat: no-repeat; 
    background-position: right 10px center; 
    transition: all 0.3s ease; 
} 

.difficulty-select:hover { 
    box-shadow: 0 2px 8px rgba(230, 80, 27, 0.2); 
} 

.difficulty-select:focus { 
    outline: none; 
    box-shadow: 0 0 0 3px rgba(230, 80, 27, 0.2); 
} 

.diff-badge { 
    display: inline-block; 
    font-size: 0.72em; 
    font-weight: 700; 
    letter-spacing: 0.5px; 
    padding: 2px 8px; 
    border-radius: 20px; 
    transition: all 0.3s ease; 
} 

.diff-badge.easy { 
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9); 
    color: #2e7d32; 
} 

.diff-badge.medium { 
    background: linear-gradient(135deg, #fff3e0, #ffe0b2); 
    color: #E6501B; 
} 

.diff-badge.hard { 
    background: linear-gradient(135deg, #ffebee, #ffcdd2); 
    color: #c62828; 
} 

.diff-badge.mixed { 
    background: linear-gradient(135deg, #f3e5f5, #e1bee7); 
    color: var(--utn-purple-main); 
} 

.practice-feedback { 
    padding: 20px; 
    border-radius: 12px; 
    margin-bottom: 20px; 
    display: none; 
    animation: feedbackSlide 0.4s ease-out; 
} 

@keyframes feedbackSlide { 
    0% { 
        transform: translateY(-20px); 
        opacity: 0; 
    } 
    100% { 
        transform: translateY(0); 
        opacity: 1; 
    } 
} 

.practice-feedback.correct { 
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%); 
    border: 2px solid #4caf50; 
} 

.practice-feedback.incorrect { 
    background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%); 
    border: 2px solid #f44336; 
} 

.practice-feedback-head { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    margin-bottom: 10px; 
} 

.practice-feedback-icon { 
    font-size: 1.5em; 
    animation: iconBounce 0.5s ease-out; 
} 

.practice-feedback-title { 
    font-size: 1.2em; 
    font-weight: bold; 
} 

.practice-feedback-body { 
    color: #444; 
    line-height: 1.6; 
} 

/* ══════════════════════════════════════════════════════════════ EXERCISE CARD ══════════════════════════════════════════════════════════════ */ 
.exercise-card { 
    background: white; 
    border: 3px solid var(--utn-purple-main); 
    border-radius: 15px; 
    padding: 25px 20px; 
    margin-bottom: 20px; 
    box-shadow: 0 5px 20px rgba(106, 27, 154, 0.2); 
} 

.exercise-question { 
    font-size: 1.2em; 
    font-weight: 600; 
    color: var(--utn-purple-dark); 
    margin-bottom: 15px; 
    text-align: center; 
} 

.exercise-svg-box { 
    width: 120px; 
    height: 120px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    margin: 20px auto; 
    background: linear-gradient(135deg, var(--utn-lilac-light) 0%, white 100%); 
    border-radius: 12px; 
    padding: 15px; 
} 

.options-grid { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 12px; 
    margin-top: 20px; 
} 

.option-btn { 
    background: white; 
    border: 2px solid #e0e0e0; 
    border-radius: 10px; 
    padding: 12px 8px; 
    font-size: 1em; 
    color: #333; 
    font-weight: 500; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    position: relative; 
    overflow: hidden; 
} 

.option-btn::before { 
    content: ''; 
    position: absolute; 
    top: 50%; 
    left: 50%; 
    width: 0; 
    height: 0; 
    border-radius: 50%; 
    background: rgba(106, 27, 154, 0.1); 
    transform: translate(-50%, -50%); 
    transition: width 0.4s ease, height 0.4s ease; 
    pointer-events: none; 
} 

.option-btn:hover::before { 
    width: 200px; 
    height: 200px; 
} 

.option-btn:hover { 
    border-color: var(--utn-purple-main); 
    background: var(--utn-lilac-light); 
    transform: translateY(-2px); 
    box-shadow: 0 4px 12px rgba(106, 27, 154, 0.2); 
} 

.option-btn.correct { 
    background: #e8f5e9; 
    border-color: #4caf50; 
    color: #2e7d32; 
    font-weight: 600; 
    animation: correctPulse 0.5s ease-out; 
} 

@keyframes correctPulse { 
    0%, 100% { 
        transform: scale(1); 
    } 
    50% { 
        transform: scale(1.05); 
    } 
} 

.option-btn.incorrect { 
    background: #ffebee; 
    border-color: #f44336; 
    color: #c62828; 
    font-weight: 600; 
    animation: incorrectShake 0.5s ease-out; 
} 

@keyframes incorrectShake { 
    0%, 100% { 
        transform: translateX(0); 
    } 
    25%, 75% { 
        transform: translateX(-5px); 
    } 
    50% { 
        transform: translateX(5px); 
    } 
} 

.option-btn:disabled { 
    cursor: not-allowed; 
    opacity: 0.7; 
} 

.back-classic-btn { 
    display: inline-block; 
    background: linear-gradient(135deg, #757575 0%, #9e9e9e 100%); 
    color: white; 
    border: none; 
    border-radius: 10px; 
    padding: 10px 20px; 
    font-size: 0.95em; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    margin-top: 20px; 
} 

.back-classic-btn:hover { 
    background: linear-gradient(135deg, #616161 0%, #757575 100%); 
    transform: translateY(-2px); 
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2); 
} 

/* ══════════════════════════════════════════════════════════════ MODAL CON EFECTOS ══════════════════════════════════════════════════════════════ */ 
.modal { 
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: rgba(0, 0, 0, 0.7); 
    backdrop-filter: blur(5px); 
    z-index: 9999; 
    justify-content: center; 
    align-items: center; 
    animation: modalFadeIn 0.3s ease-out; 
} 

/* ESTA ES LA CLASE CRÍTICA QUE FALTABA - HACE QUE LOS MODALES SE MUESTREN */
.modal.active {
    display: flex !important;
}

@keyframes modalFadeIn { 
    0% { 
        opacity: 0; 
    } 
    100% { 
        opacity: 1; 
    } 
} 

.modal-content { 
    background: white; 
    border-radius: 20px; 
    padding: 40px; 
    max-width: 90%; 
    max-height: 85vh; 
    overflow-y: auto; 
    position: relative; 
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
                0 0 100px rgba(106, 27, 154, 0.3); 
    animation: modalSlideUp 0.4s ease-out; 
} 

@keyframes modalSlideUp { 
    0% { 
        transform: translateY(50px); 
        opacity: 0; 
    } 
    100% { 
        transform: translateY(0); 
        opacity: 1; 
    } 
} 

.modal-close { 
    position: absolute; 
    top: 15px; 
    right: 15px; 
    background: var(--utn-purple-main); 
    color: white; 
    border: none; 
    border-radius: 50%; 
    width: 40px; 
    height: 40px; 
    font-size: 1.5em; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    box-shadow: 0 2px 8px rgba(106, 27, 154, 0.3); 
} 

.modal-close:hover { 
    background: var(--utn-purple-dark); 
    transform: rotate(90deg) scale(1.1); 
    box-shadow: 0 4px 12px rgba(106, 27, 154, 0.4); 
} 

.modal-header { 
    text-align: center; 
    margin-bottom: 30px; 
    padding-bottom: 20px; 
    border-bottom: 2px solid var(--utn-lilac-light); 
} 

.modal-title { 
    color: var(--utn-purple-dark); 
    font-size: 2em; 
    margin-bottom: 10px; 
} 

.modal-subtitle { 
    color: #666; 
    font-size: 1.1em; 
} 

/* ══════════════════════════════════════════════════════════════ FIGURES GALLERY ══════════════════════════════════════════════════════════════ */ 
.figures-gallery { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); 
    gap: 20px; 
} 

.figure-item { 
    background: linear-gradient(135deg, var(--utn-lilac-light) 0%, white 100%); 
    border: 2px solid var(--utn-purple-main); 
    border-radius: 12px; 
    padding: 20px; 
    text-align: center; 
    transition: all 0.3s ease; 
    cursor: pointer; 
} 

.figure-item:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 8px 20px rgba(106, 27, 154, 0.3); 
    border-color: var(--utn-purple-dark); 
} 

.figure-item svg { 
    width: 100px; 
    height: 100px; 
    margin-bottom: 15px; 
    transition: transform 0.3s ease; 
} 

.figure-item:hover svg { 
    transform: scale(1.1) rotate(5deg); 
} 

.figure-3d-container { 
    width: 120px; 
    height: 120px; 
    margin: 0 auto 15px; 
} 

.figure-item h3,
.figure-item-name { 
    color: var(--utn-purple-dark); 
    font-size: 1.1em; 
    margin-bottom: 8px; 
} 

.figure-item p { 
    color: #666; 
    font-size: 0.9em; 
} 

/* ══════════════════════════════════════════════════════════════ FORMULAS LIST ══════════════════════════════════════════════════════════════ */ 
.formulas-list { 
    display: grid; 
    gap: 25px; 
} 

.formula-item,
.formula-detail { 
    background: linear-gradient(135deg, var(--utn-lilac-light) 0%, white 100%); 
    border: 2px solid var(--utn-purple-main); 
    border-radius: 12px; 
    padding: 25px; 
    transition: all 0.3s ease; 
} 

.formula-item:hover,
.formula-detail:hover { 
    box-shadow: 0 6px 20px rgba(106, 27, 154, 0.3); 
    transform: translateX(5px); 
} 

.formula-item h3,
.formula-detail-title { 
    color: var(--utn-purple-dark); 
    font-size: 1.3em; 
    margin-bottom: 15px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
} 

.formula-title-icon { 
    font-size: 1.5em; 
} 

.formula-desc,
.formula-explanation { 
    color: #666; 
    margin-bottom: 15px; 
    line-height: 1.6; 
} 

.formula-math,
.formula-expression { 
    background: white; 
    padding: 15px; 
    border-radius: 8px; 
    margin: 10px 0; 
    border: 2px dashed var(--utn-purple-main); 
} 

.formula-vars,
.formula-variables { 
    background: #f5f7fa; 
    padding: 15px; 
    border-radius: 8px; 
    margin: 15px 0; 
} 

.formula-vars h4,
.formula-variables h4 { 
    color: var(--utn-purple-main); 
    margin-bottom: 10px; 
} 

.formula-var-item,
.formula-variables ul li { 
    padding: 5px 0; 
    color: #444; 
} 

.formula-example { 
    background: white; 
    padding: 20px; 
    border-radius: 10px; 
    margin: 15px 0; 
    border: 2px dashed var(--utn-purple-main); 
} 

.formula-example h4 { 
    color: var(--utn-purple-main); 
    margin-bottom: 15px; 
} 

.example-step { 
    margin: 10px 0; 
    padding-left: 15px; 
    color: #444; 
    line-height: 1.8; 
} 

/* ══════════════════════════════════════════════════════════════ RESPONSIVE DESIGN ══════════════════════════════════════════════════════════════ */ 
@media (max-width: 768px) { 
    body { 
        padding: 10px; 
    } 
    
    .title-header { 
        margin: -15px -15px 15px -15px; 
        padding: 90px 15px 15px 15px; 
        min-height: 80px; 
    } 
    
    .utn-banner { 
        width: 200px; 
        height: 120px; 
        padding: 15px; 
    } 
    
    .utn-logo { 
        width: 120px; 
    } 
    
    .fmt-logo-container { 
        top: 15px; 
        right: 15px; 
    } 
    
    .fmt-logo { 
        height: 50px; 
    } 
    
    .container { 
        padding: 15px; 
    } 
    
    h1 { 
        font-size: 1.5em; 
        margin-bottom: 5px; 
    } 
    
    .subtitle { 
        font-size: 0.85em; 
        margin-bottom: 15px; 
    } 
    
    .scoreboard { 
        padding: 12px; 
        margin-bottom: 15px; 
        gap: 10px; 
    } 
    
    .score-label { 
        font-size: 0.7em; 
    } 
    
    .score-value, .streak-value { 
        font-size: 1.3em; 
    } 
    
    .fire-emoji { 
        font-size: 1em; 
    } 
    
    .game-board { 
        grid-template-columns: repeat(2, 1fr); 
        gap: 10px; 
    } 
    
    .section-title { 
        font-size: 0.95em; 
        padding: 6px; 
        margin-bottom: 5px; 
    } 
    
    .card { 
        height: 70px; 
        padding: 8px; 
    } 
    
    .figure-name { 
        font-size: 0.75em; 
        min-width: 70px; 
    } 
    
    .figure-content { 
        gap: 8px; 
    } 
    
    .formula-content { 
        font-size: 0.65em; 
    } 
    
    svg { 
        width: 40px; 
        height: 40px; 
    } 
    
    .function-icon { 
        font-size: 1.5em; 
        margin-bottom: 2px; 
    } 
    
    .function-card-wrapper { 
        padding: 6px; 
        gap: 3px; 
    } 
    
    .function-name { 
        font-size: 0.68em; 
        line-height: 1.15; 
    } 
    
    button { 
        padding: 10px 20px; 
        font-size: 0.9em; 
    } 
    
    .success-message { 
        font-size: 1em; 
        margin-top: 10px; 
    } 
    
    .tip-toast { 
        max-width: 95%; 
    } 
    
    .modal-content { 
        padding: 20px; 
        max-width: 95%; 
    } 
    
    .modal-title { 
        font-size: 1.8em; 
    } 
    
    .figures-gallery { 
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); 
        gap: 15px; 
    } 
    
    .figure-item svg { 
        width: 80px; 
        height: 80px; 
    } 
    
    .figure-3d-container { 
        width: 100px; 
        height: 100px; 
    } 
    
    .exercise-card { 
        padding: 18px 14px; 
    } 
    
    .exercise-svg-box { 
        width: 90px; 
        height: 90px; 
    } 
    
    .options-grid { 
        gap: 8px; 
    } 
    
    .option-btn { 
        font-size: 0.92em; 
        padding: 11px 6px; 
    } 
    
    .exercise-question { 
        font-size: 1em; 
    } 
} 

@media (max-width: 480px) { 
    .title-header { 
        margin: -12px -12px 12px -12px; 
        padding: 75px 12px 12px 12px; 
        min-height: 70px; 
    } 
    
    .utn-banner { 
        width: 160px; 
        height: 100px; 
        padding: 12px; 
    } 
    
    .utn-logo { 
        width: 85px; 
    } 
    
    .fmt-logo-container { 
        top: 10px; 
        right: 10px; 
    } 
    
    .fmt-logo { 
        height: 35px; 
    } 
    
    .container { 
        padding: 12px; 
    } 
    
    h1 { 
        font-size: 1.2em; 
    } 
    
    .subtitle { 
        font-size: 0.8em; 
    } 
    
    .scoreboard { 
        padding: 8px; 
        gap: 8px; 
    } 
    
    .score-label { 
        font-size: 0.65em; 
    } 
    
    .score-value, .streak-value { 
        font-size: 1em; 
    } 
    
    .fire-emoji { 
        font-size: 0.9em; 
    } 
    
    .game-board { 
        gap: 8px; 
    } 
    
    .section-title { 
        font-size: 0.8em; 
        padding: 5px; 
    } 
    
    .card { 
        height: 60px; 
        padding: 5px; 
    } 
    
    .figure-name { 
        font-size: 0.65em; 
        min-width: 55px; 
    } 
    
    .figure-content { 
        gap: 6px; 
    } 
    
    .formula-content { 
        font-size: 0.55em; 
    } 
    
    svg { 
        width: 32px; 
        height: 32px; 
    } 
    
    .function-icon { 
        font-size: 1.15em; 
        margin-bottom: 0; 
    } 
    
    .function-card-wrapper { 
        padding: 3px; 
        gap: 1px; 
    } 
    
    .function-name { 
        font-size: 0.58em; 
        line-height: 1.05; 
    } 
    
    button { 
        padding: 8px 18px; 
        font-size: 0.85em; 
    } 
    
    .mode-selector-wrap { 
        flex-wrap: wrap; 
        gap: 6px; 
    } 
    
    .options-grid { 
        grid-template-columns: 1fr; 
    } 
} 

.fire-emoji { 
    width: 28px; 
    height: 28px; 
    vertical-align: middle; 
    margin-right: 6px; 
} 

/* ══════════════════════════════════════════════════════════════ ESTILOS ADICIONALES PARA FUNCIONES ══════════════════════════════════════════════════════════════ */ 
.function-icon-large { 
    font-size: 3em; 
    text-align: center; 
    margin: 10px 0; 
} 

.formula-svg-example { 
    background: #f5f7fa; 
    border-radius: 8px; 
    padding: 15px; 
    margin: 15px 0; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
} 

.formula-svg-example svg { 
    max-width: 100%; 
    height: auto; 
}
body {
    background: linear-gradient(45deg,
        #4a148c 0%,
        #6a1b9a 20%,
        #8e24aa 40%,
        #ab47bc 60%,
        #6a1b9a 80%,
        #4a148c 100%);
    background-size: 600% 600%;
    animation: gradientRotate 25s ease infinite;
}

@keyframes gradientRotate {
    0% {
        background-position: 0% 0%;
    }
    25% {
        background-position: 100% 0%;
    }
    50% {
        background-position: 100% 100%;
    }
    75% {
        background-position: 0% 100%;
    }
    100% {
        background-position: 0% 0%;
    }
}
/* Animación para el fueguito cuando aumenta la racha */
@keyframes fireExcited {
    0% {
        transform: scale(1) rotate(0deg);
    }
    25% {
        transform: scale(1.3) rotate(-10deg);
    }
    50% {
        transform: scale(1.5) rotate(10deg);
    }
    75% {
        transform: scale(1.3) rotate(-5deg);
    }
    100% {
        transform: scale(1) rotate(0deg);
    }
}

@keyframes fireJump {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-10px) scale(1.2);
    }
}

.fire-emoji.excited {
    animation: fireExcited 0.6s ease-in-out;
}

.fire-emoji.jump {
    animation: fireJump 0.4s ease-out;
}