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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #262626;
    background: #fff;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
}

.gradient-bg {
    background: linear-gradient(135deg, #81C8E6 0%, #A4C8E1 100%);
}

.gradient-text {
    background: linear-gradient(135deg, #3B9EBF 0%, #5BA8CC 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.hero-section {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    padding: 2rem 0 8rem;
}

.hero-grid {
    display: grid;
    gap: 3rem;
    align-items: center;
    padding-top: 2rem;
}

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    text-align: center;
}

@media (min-width: 1024px) {
    .hero-content {
        text-align: left;
    }
}

.badge {
    display: inline-block;
    background: white;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    margin-bottom: 2rem;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 3rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3.75rem;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 600px;
}

@media (min-width: 640px) {
    .hero-subtitle {
        font-size: 1.5rem;
    }
}

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .btn-group {
        flex-direction: row;
    }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem 2rem;
    border-radius: 1rem;
    font-weight: 700;
    font-size: 1.125rem;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(to right, #EF4444, #A855F7, #3B82F6);
    color: white;
    box-shadow: 0 20px 50px rgba(147, 51, 234, 0.5);
    animation: btnGlow 2s infinite;
}

@keyframes btnGlow {
    0%, 100% {
        box-shadow: 0 10px 40px rgba(239, 68, 68, 0.5);
    }
    50% {
        box-shadow: 0 10px 50px rgba(59, 130, 246, 0.6);
    }
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(147, 51, 234, 0.8);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #3B9EBF;
}

.btn-secondary:hover {
    background: white;
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stars {
    display: flex;
    color: #F59E0B;
}

.star {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.wave-separator {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
}

section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

@media (min-width: 640px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: #666;
    margin-bottom: 4rem;
}

.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-3 {
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    background: white;
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
    text-align: center;
    height: 100%;
}

.card:hover {
    transform: translateY(-8px);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.icon {
    width: 48px;
    height: 48px;
}

.testimonial-carousel {
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

.testimonial-track {
    display: flex;
    gap: 1rem;
    animation: scroll 20s linear infinite;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.testimonial-item {
    flex: 0 0 350px;
}

.testimonial-img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    border-radius: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.pricing-card {
    background: white;
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 4px solid #3B9EBF;
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.popular-badge {
    position: absolute;
    top: -1rem;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(to right, #3B9EBF, #81C8E6);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.price-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin: 1.5rem 0;
}

.price-currency {
    font-size: 1.875rem;
    font-weight: 700;
}

.price-value {
    font-size: 4.5rem;
    font-weight: 700;
}

.price-cents {
    font-size: 1.875rem;
    font-weight: 700;
}

.feature-list {
    list-style: none;
    margin: 2rem 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    color: #374151;
}

.check-icon {
    width: 24px;
    height: 24px;
    color: #10B981;
    flex-shrink: 0;
    margin-top: 2px;
}

.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: #F3F4F6;
    border-radius: 1rem;
    margin-bottom: 1rem;
    padding: 1.5rem;
}

.accordion-header {
    cursor: pointer;
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    color: #666;
    padding-top: 0;
}

.accordion-content.active {
    max-height: 500px;
    padding-top: 1rem;
}

.accordion-icon {
    transition: transform 0.3s;
}

.accordion-icon.active {
    transform: rotate(180deg);
}

footer {
    background: #111827;
    color: white;
    padding: 3rem 0;
}

.footer-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

.footer-link {
    color: #9CA3AF;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-link:hover {
    color: white;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 2rem 0;
    border-top: 1px solid #374151;
}

.social-link {
    width: 48px;
    height: 48px;
    background: #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
    text-decoration: none;
    color: white;
}

.social-link:hover {
    background: #3B9EBF;
}

.promo-box {
    background: linear-gradient(to right, #3B9EBF, #81C8E6);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    margin: 2rem 0;
    color: white;
}

.copyright {
    text-align: center;
    color: #9CA3AF;
    padding-top: 2rem;
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #4B5563;
    font-weight: 600;
}

.guarantee-section {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
}

.guarantee-card {
    background: white;
    border-radius: 1.5rem;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

@media (min-width: 768px) {
    .guarantee-card {
        flex-direction: row;
    }
}

.shield-icon {
    width: 128px;
    height: 128px;
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.3);
    flex-shrink: 0;
}

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

@media (min-width: 768px) {
    .guarantee-content {
        text-align: left;
    }
}

.guarantee-badge {
    display: inline-block;
    background: linear-gradient(to right, #10B981, #059669);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.guarantee-features {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

@media (min-width: 640px) {
    .guarantee-features {
        grid-template-columns: repeat(3, 1fr);
    }
}

.guarantee-feature {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    padding: 1rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.book-sample {
    position: relative;
    overflow: hidden;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s;
}

.book-sample:hover {
    transform: translateY(-8px);
}

.book-img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.book-img.contain {
    object-fit: contain;
    background: white;
}

.book-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    padding: 1.5rem;
    color: white;
}

.hero-image {
    width: 100%;
    border-radius: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

@media (max-width: 1023px) {
    .hero-image-desktop {
        display: none;
    }
}

@media (min-width: 1024px) {
    .hero-image-mobile {
        display: none;
    }
}

@keyframes btnGlowGreen {
    0%, 100% {
        box-shadow: 0 10px 40px rgba(34, 197, 94, 0.4);
    }
    50% {
        box-shadow: 0 10px 50px rgba(34, 197, 94, 0.6);
    }
}