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

:root {
    /* Cores da bandeira da Inglaterra */
    --red: #C8102E;
    --blue: #012169;
    --white: #FFFFFF;
    --light-blue: #E8F0F8;
    --dark-red: #A00D25;
    --dark-blue: #001A4A;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 100px 0;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-blue);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blue);
}

.flag-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    line-height: 1;
    vertical-align: middle;
    opacity: 1;
    visibility: visible;
    width: 32px;
    height: 24px;
    flex-shrink: 0;
}

.flag-icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

.nav-brand:hover .flag-icon {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.15));
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-blue);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:not(.btn-nav)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--red);
    transition: var(--transition);
}

.nav-menu a:not(.btn-nav):hover::after {
    width: 100%;
}

.btn-nav {
    background: var(--red);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 25px;
    transition: var(--transition);
}

.btn-nav:hover {
    background: var(--dark-red);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(200, 16, 46, 0.3);
}

.btn-nav::after {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    width: 40px;
    height: 40px;
    position: relative;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--blue);
    border-radius: 3px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
    position: absolute;
    left: 50%;
    margin-left: -12.5px;
}

.mobile-menu-toggle span:nth-child(1) {
    top: 11px;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 18px;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 25px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    top: 18px;
    transform: translateX(-50%) rotate(45deg);
    margin-left: 0;
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-50%) scaleX(0);
    margin-left: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    top: 18px;
    transform: translateX(-50%) rotate(-45deg);
    margin-left: 0;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
    z-index: -1;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(200, 16, 46, 0.03) 35px, rgba(200, 16, 46, 0.03) 70px);
    opacity: 0.5;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark-blue);
}

.highlight {
    color: var(--red);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    height: 12px;
    background: rgba(200, 16, 46, 0.2);
    z-index: -1;
    border-radius: 2px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    padding: 15px 35px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--red);
    color: var(--white);
    box-shadow: 0 5px 20px rgba(200, 16, 46, 0.3);
}

.btn-primary:hover {
    background: var(--dark-red);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(200, 16, 46, 0.4);
}

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

.btn-secondary:hover {
    background: var(--blue);
    color: var(--white);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 45px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    margin-top: 40px;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--red);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--blue);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--blue);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

/* Methodology Section */
.methodology {
    padding: var(--section-padding);
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.step-card {
    background: var(--white);
    border: 2px solid var(--light-blue);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--red), var(--blue));
    transform: scaleX(0);
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--red);
}

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

.step-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--red);
    opacity: 0.5;
    margin-bottom: 15px;
}

.step-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    display: block;
}

.step-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.step-description {
    color: #666;
    line-height: 1.8;
}

.methodology-flow {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
}

.flow-arrow {
    font-size: 3rem;
    color: var(--red);
    margin-bottom: 10px;
    animation: pulse 2s infinite;
}

.flow-text {
    font-size: 1.1rem;
    color: var(--blue);
    font-weight: 600;
}

/* Teacher Section */
.teacher-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
}

.teacher-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.teacher-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.teacher-badge {
    position: absolute;
    top: -20px;
    right: -20px;
    background: var(--red);
    color: var(--white);
    padding: 15px 25px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(200, 16, 46, 0.3);
    z-index: 10;
    animation: pulse 2s infinite;
}

.badge-icon {
    font-size: 1.5rem;
}

.teacher-placeholder {
    width: 450px;
    height: 450px;
    background: linear-gradient(135deg, var(--blue) 0%, var(--dark-blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.teacher-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.05) 10px,
        rgba(255, 255, 255, 0.05) 20px
    );
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.teacher-icon {
    font-size: 8rem;
    z-index: 1;
    position: relative;
}

.teacher-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    z-index: 1;
    position: relative;
}

.teacher-info {
    padding: 20px 0;
}

.teacher-description {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.teacher-benefits {
    list-style: none;
    margin-bottom: 30px;
}

.teacher-benefits li {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    align-items: flex-start;
}

.teacher-check {
    width: 35px;
    height: 35px;
    background: var(--red);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 5px;
}

.teacher-benefits li strong {
    display: block;
    color: var(--dark-blue);
    font-size: 1.2rem;
    margin-bottom: 5px;
    font-weight: 700;
}

.teacher-benefits li p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.teacher-cta {
    background: var(--light-blue);
    padding: 25px 30px;
    border-radius: 15px;
    border-left: 5px solid var(--red);
    margin-top: 30px;
}

.teacher-highlight {
    font-size: 1.1rem;
    color: var(--dark-blue);
    line-height: 1.8;
    margin: 0;
}

.teacher-highlight strong {
    color: var(--red);
    font-weight: 700;
}

/* Video Section */
.video-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
}

.video-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    background: var(--dark-blue);
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blue) 0%, var(--dark-blue) 100%);
    cursor: pointer;
    transition: var(--transition);
}

.video-placeholder:hover {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--blue) 100%);
}

.play-button {
    margin-bottom: 20px;
    transition: var(--transition);
}

.video-placeholder:hover .play-button {
    transform: scale(1.1);
}

.video-placeholder-text {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.video-note {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    text-align: center;
    padding: 0 20px;
}

.video-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.video-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--dark-blue);
    font-weight: 500;
}

.feature-icon {
    font-size: 1.5rem;
}

/* Test Class Section */
.test-class {
    padding: var(--section-padding);
    background: var(--white);
}

.test-class-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.test-class-benefits {
    list-style: none;
    margin-top: 30px;
}

.test-class-benefits li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.check-icon {
    width: 30px;
    height: 30px;
    background: var(--red);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.test-class-form-wrapper {
    background: var(--light-blue);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.test-class-form h3 {
    font-size: 1.8rem;
    color: var(--dark-blue);
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-blue);
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    font-family: var(--font-family);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--red);
    box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
}

.form-note {
    text-align: center;
    font-size: 0.85rem;
    color: #666;
    margin-top: 15px;
}

/* Benefits Section */
.benefits {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.benefit-card h3 {
    font-size: 1.3rem;
    color: var(--dark-blue);
    margin-bottom: 15px;
    font-weight: 700;
}

.benefit-card p {
    color: #666;
    line-height: 1.8;
}

/* Testimonials Section */
.testimonials {
    padding: var(--section-padding);
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--light-blue);
    padding: 40px 30px;
    border-radius: 20px;
    border-left: 5px solid var(--red);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.testimonial-stars {
    color: var(--red);
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 1.1rem;
    color: var(--dark-blue);
    line-height: 1.8;
    margin-bottom: 25px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--red);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.author-name {
    font-weight: 700;
    color: var(--dark-blue);
}

.author-role {
    font-size: 0.9rem;
    color: #666;
}

/* CTA Section */
.cta-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.cta-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.cta-section .btn-secondary:hover {
    background: var(--white);
    color: var(--blue);
}

/* About the Name Section */
.about-name-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
}

.about-name-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.name-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    display: block;
}

.about-name-section .section-title {
    margin-bottom: 30px;
}

.name-explanation {
    text-align: left;
}

.name-intro {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--dark-blue);
    margin-bottom: 40px;
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.name-intro strong {
    color: var(--red);
    font-weight: 700;
}

.name-details {
    display: grid;
    gap: 30px;
    margin-bottom: 40px;
}

.name-detail-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.name-detail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.detail-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.name-detail-item h3 {
    font-size: 1.4rem;
    color: var(--dark-blue);
    margin-bottom: 15px;
    font-weight: 700;
}

.name-detail-item p {
    color: #666;
    line-height: 1.8;
    font-size: 1.05rem;
}

.name-detail-item strong {
    color: var(--red);
    font-weight: 600;
}

.name-cta {
    background: linear-gradient(135deg, var(--red) 0%, var(--dark-red) 100%);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(200, 16, 46, 0.3);
}

.name-message {
    font-size: 1.2rem;
    color: var(--white);
    line-height: 1.8;
    margin: 0;
    text-align: center;
}

.name-message strong {
    font-weight: 700;
    font-size: 1.3rem;
}

/* Footer */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .nav-brand {
    color: var(--white);
    margin-bottom: 15px;
}

.footer-description {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-column h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

/* Floating WhatsApp Button */
.floating-whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(37, 211, 102, 0.4);
    z-index: 999;
    cursor: pointer;
    transition: var(--transition);
    animation: float 3s ease-in-out infinite;
    text-decoration: none;
}

.floating-whatsapp:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.6);
    animation: none;
    background: #20BA5A;
}

.floating-whatsapp svg {
    width: 32px;
    height: 32px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        overflow: hidden;
        transition: max-height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .navbar:not(.active) {
        max-height: 70px;
        min-height: 70px;
    }

    .navbar.active {
        max-height: 100vh;
        box-shadow: 0 5px 30px rgba(0, 0, 0, 0.15);
    }

    .navbar .container {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        min-height: 70px;
        flex-wrap: wrap;
        width: 100%;
        box-sizing: border-box;
    }

    .navbar.active .container {
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .nav-brand {
        flex-shrink: 0;
        white-space: nowrap;
        font-size: 1.3rem;
        order: 1;
        gap: 10px;
    }

    .nav-brand .flag-icon {
        width: 26px;
        height: 20px;
    }

    .mobile-menu-toggle {
        flex-shrink: 0;
        margin-left: 10px;
        order: 2;
    }

    .nav-menu {
        order: 3;
        width: 100%;
    }

    .mobile-menu-toggle {
        flex-shrink: 0;
        margin-left: 10px;
    }

    .nav-menu {
        display: flex;
        flex-direction: column;
        width: 100%;
        list-style: none;
        gap: 0;
        padding: 0;
        margin: 0;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        transition: max-height 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity 0.6s ease 0.2s;
    }

    .navbar.active .nav-menu {
        max-height: 500px;
        opacity: 1;
        padding: 0;
    }

    .nav-menu li {
        width: 100%;
        margin-bottom: 0;
    }

    .nav-menu a {
        display: block;
        padding: 15px 0;
        text-align: center;
        font-size: 1.1rem;
        width: 100%;
    }

    .nav-menu a:not(.btn-nav)::after {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
        position: relative;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .hero-stats {
        gap: 30px;
    }

    .test-class-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .steps-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .teacher-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .teacher-image-wrapper {
        order: -1;
    }

    .teacher-placeholder {
        width: 350px;
        height: 350px;
    }

    .teacher-icon {
        font-size: 6rem;
    }

    .benefits-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .name-details {
        grid-template-columns: 1fr;
    }

    .name-intro {
        font-size: 1.1rem;
        padding: 20px;
    }

    .name-detail-item {
        flex-direction: column;
        text-align: center;
    }

    .name-cta {
        padding: 30px 20px;
    }

    .name-message {
        font-size: 1.1rem;
    }

    .name-message strong {
        font-size: 1.2rem;
    }

    .floating-whatsapp {
        width: 56px;
        height: 56px;
        bottom: 20px;
        right: 20px;
    }

    .floating-whatsapp svg {
        width: 28px;
        height: 28px;
    }
}

@media (max-width: 1024px) {
    .steps-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .steps-container {
        grid-template-columns: 1fr;
    }

    .highlight::after {
        bottom: 6px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    :root {
        --section-padding: 60px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .test-class-form-wrapper {
        padding: 25px;
    }

    .highlight::after {
        bottom: 4px;
        height: 8px;
        opacity: 0.3;
    }
}

    .teacher-placeholder {
        width: 280px;
        height: 280px;
    }

    .teacher-icon {
        font-size: 5rem;
    }

    .teacher-badge {
        padding: 12px 20px;
        font-size: 1rem;
        top: -15px;
        right: -15px;
    }
}