/* styles.css */

:root {
    --primary: #2C3E50;
    --secondary: #8B4513;
    --accent: #D4A574;
    --gold: #C9A961;
    --dark: #1A1A2E;
    --light: #F5F5F0;
    --text: #333333;
    --text-light: #666666;
    --white: #FFFFFF;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 40px rgba(0,0,0,0.1);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Canvas Background */
#geologyCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.2;
}

.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--secondary);
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

.section-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1rem;
    height: 2px;
    background: var(--gold);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--primary);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    line-height: 1.7;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo i {
    color: var(--secondary);
    font-size: 1.75rem;
}

.logo .accent {
    color: var(--gold);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(212, 165, 116, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: var(--primary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.gradient-text {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 600px;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--secondary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.3);
}

.btn-primary:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 69, 19, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--white);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Hero Section - ESTABLE Y FIJO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    position: relative;
    overflow: hidden;
    /* Eliminar cualquier transformación que cause movimiento */
    transform: none !important;
    /* Asegurar que ocupe el espacio correcto */
    width: 100%;
    box-sizing: border-box;
}

/* Contenedor del hero para mantener contenido centrado y estable */
.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
    /* Asegurar que no se mueva con scroll */
    transform: none !important;
    will-change: auto;
}

/* Eliminar animaciones que causen inestabilidad visual */
.hero-badge,
.hero-title,
.hero-subtitle,
.hero-cta,
.hero-stats {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
}

/* Si quieres mantener las animaciones de entrada pero que sean estáticas después */
.hero-badge,
.hero-title,
.hero-subtitle,
.hero-cta,
.hero-stats {
    animation: fadeInUp 0.8s ease forwards;
}

/* Visual del hero - posición absoluta fija */
.hero-visual {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    opacity: 0.1;
    pointer-events: none;
    /* Prevenir cualquier movimiento */
    will-change: auto;
    z-index: 1;
}

/* Capas estratigráficas estáticas */
.stratigraphy-layer {
    position: absolute;
    width: 100%;
    height: 20%;
    border-radius: 100px;
    opacity: 0.6;
    /* Eliminar transiciones que puedan causar movimiento */
    transition: none;
    transform: none !important;
}

.layer-1 { background: var(--primary); top: 0; }
.layer-2 { background: var(--secondary); top: 25%; width: 90%; left: 5%; }
.layer-3 { background: var(--accent); top: 50%; width: 80%; left: 10%; }
.layer-4 { background: var(--gold); top: 75%; width: 70%; left: 15%; }

/* Rosa de los vientos - rotación suave y constante o estática */
.compass-rose {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    opacity: 0.3;
    /* Opción 1: Eliminar rotación para que sea completamente estática */
    animation: none;
}

/* Opción 2: Si quieres que gire muy suavemente pero sea estable */
.compass-circle {
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary);
    border-radius: 50%;
    position: relative;
    /* Rotación muy lenta y suave */
    animation: rotate 60s linear infinite;
    /* Suavizar la animación */
    will-change: transform;
}

/* Estadísticas - layout estable */
.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 3rem;
    /* Asegurar que no se desplacen */
    position: relative;
    bottom: auto;
    left: auto;
}

.stat-item {
    text-align: center;
    /* Evitar saltos de layout */
    min-width: 120px;
}

.stat-number {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1;
    /* Contenedor estable para el contador */
    min-height: 2.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;
    margin-top: 0.5rem;
}

/* Responsive estable */
@media (max-width: 968px) {
    .hero {
        min-height: auto;
        padding: 6rem 0 4rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        justify-content: center;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 5rem 0 3rem;
    }
    
    .hero-content {
        width: 100%;
        padding: 0 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
}

.stratigraphy-layer {
    position: absolute;
    width: 100%;
    height: 20%;
    border-radius: 100px;
    opacity: 0.6;
}

.layer-1 { background: var(--primary); top: 0; }
.layer-2 { background: var(--secondary); top: 25%; width: 90%; left: 5%; }
.layer-3 { background: var(--accent); top: 50%; width: 80%; left: 10%; }
.layer-4 { background: var(--gold); top: 75%; width: 70%; left: 15%; }

.compass-rose {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    opacity: 0.3;
}

.compass-circle {
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary);
    border-radius: 50%;
    position: relative;
    animation: rotate 20s linear infinite;
}

.compass-needle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2px;
    height: 80%;
    background: var(--secondary);
    transform: translate(-50%, -50%);
}

.compass-needle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -4px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 20px solid var(--secondary);
}

/* Services Section */
.services {
    padding: 6rem 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header .section-tag {
    padding-left: 0;
}

.section-header .section-tag::before {
    display: none;
}

.section-header .section-tag::after {
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    background: var(--gold);
    margin: 0.5rem auto 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--light);
    padding: 2.5rem;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary), var(--gold));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--white);
    font-size: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.service-hover {
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.service-card:hover .service-hover {
    opacity: 1;
    transform: translateY(0);
}

.learn-more {
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: linear-gradient(180deg, var(--light) 0%, var(--white) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text .section-tag {
    padding-left: 0;
}

.about-text .section-tag::before {
    display: none;
}

.about-lead {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.credentials {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.credential-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.credential-item i {
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.credential-item strong {
    display: block;
    color: var(--primary);
}

.credential-item span {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline-line {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--secondary), var(--gold));
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
    padding-left: 2rem;
}

.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: var(--gold);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--gold);
    transform: translateX(-5px);
}

.timeline-content {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-hover);
}

.timeline-year {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-card {
    background: var(--light);
    padding: 1.5rem;
    border-radius: 15px;
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.info-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary), var(--gold));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.info-card h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.info-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.availability-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(39, 174, 96, 0.1);
    border-radius: 50px;
    color: #27ae60;
    font-weight: 600;
    font-size: 0.9rem;
}

.pulse {
    width: 10px;
    height: 10px;
    background: #27ae60;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

/* Contact Form */
.contact-form {
    background: var(--light);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem 0;
    border: none;
    border-bottom: 2px solid #ddd;
    background: transparent;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.form-group label {
    position: absolute;
    left: 0;
    top: 1rem;
    color: var(--text-light);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus,
.form-group input:valid,
.form-group select:focus,
.form-group select:valid,
.form-group textarea:focus,
.form-group textarea:valid {
    border-bottom-color: var(--secondary);
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
    top: -0.5rem;
    font-size: 0.875rem;
    color: var(--secondary);
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}

.form-group input:focus ~ .form-line,
.form-group textarea:focus ~ .form-line {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--primary);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.footer-links h4,
.footer-social h4 {
    color: var(--gold);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--gold);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    font-size: 1.25rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.1);
    transform: scale(0);
    transition: var(--transition);
    border-radius: 50%;
}

.social-link:hover::before {
    transform: scale(1);
}

.youtube { background: #FF0000; }
.instagram { background: #E4405F; }
.tiktok { background: #000000; border: 1px solid rgba(255,255,255,0.2); }
.whatsapp { background: #25D366; }

.social-link:hover {
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.6);
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: var(--transition);
}

.footer-legal a:hover {
    color: var(--gold);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(39, 174, 96, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(39, 174, 96, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(39, 174, 96, 0); }
}

/* Responsive */
@media (max-width: 968px) {
    .hero-visual {
        display: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 5rem 2rem;
        transition: var(--transition);
        box-shadow: -5px 0 30px rgba(0,0,0,0.1);
    }
    
    .nav-list.active {
        right: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
        z-index: 1001;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
    }
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.robot-check{
margin:20px 0;
font-size:0.9rem;
color:var(--text-light);
display:flex;
align-items:center;
gap:10px;
}

.robot-check input{
width:18px;
height:18px;
cursor:pointer;
}

button:disabled{
opacity:0.5;
cursor:not-allowed;
}

/* ===== BOTÓN HAMBURGUESA -> X ===== */

.mobile-menu-btn{
    position: relative;
    width: 35px;
    height: 30px;
    justify-content: center;
    align-items: center;
}

.mobile-menu-btn span{
    position: absolute;
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: .35s ease;
}

.mobile-menu-btn span:nth-child(1){
    transform: translateY(-8px);
}

.mobile-menu-btn span:nth-child(2){
    transform: translateY(0);
}

.mobile-menu-btn span:nth-child(3){
    transform: translateY(8px);
}

/* Estado abierto */

.mobile-menu-btn.active span:nth-child(1){
    transform: rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2){
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3){
    transform: rotate(-45deg);
}