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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    scroll-behavior: smooth;
}

/* Skip link para navegação por teclado */
.skip-link {
    position: absolute;
    top: -44px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
}

.skip-link:focus {
    top: 0;
}

/* Classe para esconder visualmente mas manter acessível para leitores de tela */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

#header {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#header-img {
    width: 0;
    height: 0;
    opacity: 0;
    position: absolute;
}

.logo-text {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: transform 0.2s ease, text-shadow 0.2s ease, color 0.2s ease;
}

.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo-link:hover .logo-text,
.logo-link:focus .logo-text {
    transform: scale(1.05);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    color: #f0f0f0;
}

.logo-link:focus {
    outline: 3px solid #fff;
    outline-offset: 4px;
    border-radius: 4px;
}

.logo-text .highlight {
    color: #ff6b6b;
}

#nav-bar {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-link:hover,
.nav-link:focus {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.nav-link:focus {
    outline: 3px solid #fff;
    outline-offset: 2px;
}

main {
    margin-top: 70px;
}

section {
    padding: 4rem 2rem;
    width: 100%;
}

#hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 6rem 2rem;
}

#hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

#hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

#form {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

#email {
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    min-width: 300px;
    flex: 1;
    max-width: 400px;
    transition: box-shadow 0.3s;
}

#email:focus {
    outline: 3px solid #ff6b6b;
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.3);
}

#submit {
    padding: 1rem 2rem;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

#submit:hover,
#submit:focus {
    background: #ee5a52;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

#submit:focus {
    outline: 3px solid #fff;
    outline-offset: 2px;
}

#submit:active {
    transform: scale(0.98);
}

#features {
    background: #f8f9fa;
}

#features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #667eea;
}

.features-container {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.feature {
    flex: 1;
    min-width: 280px;
    max-width: 380px;
    padding: 3rem 2.5rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.feature:hover::before,
.feature:focus-within::before {
    transform: scaleX(1);
}

.feature:hover,
.feature:focus-within {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.2);
}

.pricing-container {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}

.pricing-card {
    flex: 1;
    min-width: 280px;
    max-width: 340px;
    padding: 2.5rem 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s;
    border: 2px solid transparent;
    position: relative;
}

.pricing-card:hover,
.pricing-card:focus-within {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    border-color: #667eea;
}

.pricing-card.featured {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: scale(1.05);
    border-color: #667eea;
}

.pricing-card.featured:hover,
.pricing-card.featured:focus-within {
    transform: scale(1.08) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #ff6b6b;
    color: white;
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-tier {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pricing-card.featured .pricing-tier {
    color: white;
}

.pricing-price {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 1.5rem 0;
    line-height: 1;
}

.pricing-currency {
    font-size: 1.8rem;
    vertical-align: super;
}

.pricing-period {
    font-size: 1rem;
    font-weight: 400;
    color: #666;
    margin-left: 0.3rem;
}

.pricing-card.featured .pricing-period {
    color: rgba(255, 255, 255, 0.8);
}

.pricing-description {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin: 1.5rem 0 2rem 0;
    min-height: 48px;
}

.pricing-card.featured .pricing-description {
    color: rgba(255, 255, 255, 0.9);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    text-align: left;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-card.featured .pricing-features li {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '✓';
    color: #667eea;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.pricing-card.featured .pricing-features li::before {
    color: #fff;
}

.pricing-cta {
    display: block;
    width: 100%;
    padding: 1rem 2rem;
    margin-top: 2rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    text-align: center;
}

.pricing-cta:hover,
.pricing-cta:focus {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.pricing-cta:focus {
    outline: 3px solid #333;
    outline-offset: 2px;
}

.pricing-card.featured .pricing-cta {
    background: white;
    color: #667eea;
}

.pricing-card.featured .pricing-cta:hover,
.pricing-card.featured .pricing-cta:focus {
    background: #f8f9fa;
    color: #5568d3;
}

.pricing-card.featured .pricing-cta:focus {
    outline: 3px solid #fff;
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    transition: all 0.4s;
    display: inline-block;
    filter: grayscale(0.3);
}

.feature:hover .feature-icon,
.feature:focus-within .feature-icon {
    transform: scale(1.2) rotate(5deg);
    filter: grayscale(0);
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
}

.feature p {
    color: #666;
    line-height: 1.7;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0 0;
    text-align: left;
}

.feature-list li {
    padding: 0.6rem 0;
    color: #555;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '→';
    color: #667eea;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: transform 0.3s;
}

.feature:hover .feature-list li::before,
.feature:focus-within .feature-list li::before {
    transform: translateX(5px);
}

#demo h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #667eea;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

#video {
    display: block;
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 8px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

#video:focus {
    outline: 3px solid #667eea;
    outline-offset: 4px;
}

#pricing {
    background: #f8f9fa;
}

#pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #667eea;
}

footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem;
}

/* Estados de foco visíveis para todos os elementos interativos */
a:focus,
button:focus,
input:focus {
    outline-width: 3px;
    outline-style: solid;
    outline-offset: 2px;
}

/* Remover animações para usuários que preferem movimento reduzido */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 768px) {
    #header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    #nav-bar {
        gap: 1rem;
    }

    #hero h1 {
        font-size: 2rem;
    }

    #hero p {
        font-size: 1rem;
    }

    #email {
        min-width: 100%;
    }

    .features-container {
        flex-direction: column;
    }

    .feature {
        max-width: 100%;
    }

    .pricing-container {
        flex-direction: column;
    }

    .pricing-card {
        max-width: 100%;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing-card.featured:hover,
    .pricing-card.featured:focus-within {
        transform: translateY(-8px);
    }
}

@media (max-width: 480px) {
    .nav-link {
        padding: 0.3rem 0.5rem;
        font-size: 0.9rem;
    }

    section {
        padding: 2rem 1rem;
    }
}