:root {
    /* WhatsLink+ Color Palette */
    --whatsapp-primary: #25d366;
    --whatsapp-dark: #128c7e;
    --whatsapp-deeper: #075e54;
    --accent-red: #ff6b6b;
    --accent-red-dark: #ff5252;

    /* Neutral Colors */
    --neutral-900: #0a0a0a;
    --neutral-800: #1a1a1a;
    --neutral-700: #2a2a2a;
    --neutral-600: #3a3a3a;
    --neutral-500: #6b7280;
    --neutral-400: #9ca3af;
    --neutral-300: #d1d5db;
    --neutral-200: #e5e7eb;
    --neutral-100: #f3f4f6;
    --white: #ffffff;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing Scale - UI/UX Best Practices */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    --space-16: 4rem;    /* 64px */
    --space-20: 5rem;    /* 80px */
    --space-24: 6rem;    /* 96px */

    /* Layout Spacing */
    --header-height: 80px;
    --container-padding: var(--space-4);
    --section-padding: var(--space-16);
    --card-padding: var(--space-8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--neutral-900);
    color: var(--white);
    line-height: 1.6;
    padding: 0;
    margin: 0;
}

.page-wrapper {
    max-width: 1440px;
    margin: 0 auto;
    padding-top: var(--header-height);
}

/* Adiciona distância automática pra navegação de âncora não ser coberta */
.hero,
.features,
.testimonials,
.faq,
.cta-final {
    scroll-margin-top: var(--header-height);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* Navigation - Fixed Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--neutral-800);
    padding: var(--space-4) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, box-shadow 0.3s;
}

.header.scrolled {
    background-color: rgba(26, 26, 26, 0.95);
    backdrop-filter: saturate(180%) blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.nav__logo {
    display: flex;
    align-items: center;
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
    gap: var(--space-4);
}

.nav__logo img {
    width: var(--space-12);
    height: var(--space-12);
    border-radius: var(--space-3);
    flex-shrink: 0;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.nav__link {
    color: var(--neutral-300);
    text-decoration: none;
    transition: color 0.3s;
}

.nav__link:hover {
    color: var(--whatsapp-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--space-3);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.5;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--whatsapp-primary), var(--whatsapp-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

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

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37, 211, 102, 0.3);
}

.btn--secondary:hover {
    background: rgba(37, 211, 102, 0.1);
    transform: translateY(-1px);
}

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

.btn--large {
    font-size: 1.1rem;
    padding: var(--space-4) var(--space-8);
    min-height: var(--space-12);
}

.btn--extra-large {
    font-size: 1.25rem;
    padding: var(--space-5) var(--space-10);
    min-height: var(--space-16);
}

.hero {
    padding: var(--space-20) 0 var(--space-24) 0;
    background-color: var(--neutral-800);
    position: relative;
    overflow: hidden;
}

.hero__content {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    position: relative;
    z-index: 2;
}

.hero__text {
    flex: 1;
    padding-right: var(--space-4);
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--whatsapp-primary);
    margin-bottom: var(--space-6);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--neutral-300);
    margin-bottom: var(--space-10);
    line-height: 1.6;
    max-width: 600px;
}

.hero__cta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

.hero__visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__visual img {
    max-width: 100%;
    height: auto;
    border-radius: var(--space-5);
    box-shadow: 0 var(--space-4) var(--space-8) rgba(37, 211, 102, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero__visual img:hover {
    transform: translateY(-4px);
    box-shadow: 0 var(--space-6) var(--space-12) rgba(37, 211, 102, 0.25);
}

.hero__social-proof {
    display: flex;
    gap: var(--space-12);
    flex-wrap: wrap;
    justify-content: flex-start;
}

.social-proof__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 120px;
}

.social-proof__number {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--whatsapp-primary);
    margin-bottom: var(--space-1);
    line-height: 1.2;
}

.social-proof__label {
    color: var(--neutral-400);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.features {
    background-color: var(--neutral-900);
    padding: var(--space-20) 0;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
    align-items: start;
}

.feature-card {
    background-color: var(--neutral-800);
    padding: var(--card-padding);
    border-radius: var(--space-5);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--neutral-700);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--whatsapp-primary), var(--whatsapp-dark));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--whatsapp-primary);
    box-shadow: 0 var(--space-4) var(--space-8) rgba(37, 211, 102, 0.15);
}

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

.feature-card__icon {
    font-size: 3.5rem;
    margin-bottom: var(--space-5);
    display: block;
    line-height: 1;
}

.feature-card__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--whatsapp-primary);
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.feature-card__description {
    color: var(--neutral-300);
    font-size: 1rem;
    line-height: 1.6;
}

.testimonials {
    background-color: var(--neutral-800);
    padding: var(--space-20) 0;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-8);
    align-items: start;
}

.testimonial-card {
    background-color: var(--neutral-900);
    padding: var(--card-padding);
    border-radius: var(--space-5);
    border: 1px solid var(--neutral-700);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    border-color: var(--whatsapp-primary);
    box-shadow: 0 var(--space-3) var(--space-6) rgba(37, 211, 102, 0.1);
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    font-size: 4rem;
    color: var(--whatsapp-primary);
    opacity: 0.1;
    font-family: serif;
    line-height: 1;
}

.testimonial-card p {
    color: var(--neutral-300);
    margin-bottom: var(--space-6);
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    position: relative;
    z-index: 2;
}

.testimonial-author img {
    width: var(--space-12);
    height: var(--space-12);
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--whatsapp-primary);
    flex-shrink: 0;
}

.testimonial-author span {
    color: var(--neutral-400);
    font-weight: 500;
    font-size: 0.95rem;
}

.cta-final {
    background-color: var(--neutral-900);
    padding: var(--space-20) 0 var(--space-24) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-final::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--whatsapp-primary), var(--whatsapp-dark));
    border-radius: 2px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-10);
    flex-wrap: wrap;
}

.footer {
    background-color: var(--neutral-800);
    padding: var(--space-16) 0 var(--space-12) 0;
    text-align: center;
    border-top: 1px solid var(--neutral-700);
}

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.footer__copyright {
    color: var(--neutral-400);
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer__copyright a {
    color: var(--whatsapp-primary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer__copyright a:hover {
    color: var(--white);
}

.footer__links {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
    justify-content: center;
}

.footer__links a {
    color: var(--neutral-300);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--space-2);
}

.footer__links a:hover {
    color: var(--whatsapp-primary);
    background-color: rgba(37, 211, 102, 0.1);
}

/* Typography utilities for consistent spacing */
.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--whatsapp-primary);
    margin-bottom: var(--space-4);
    text-align: center;
    line-height: 1.2;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--neutral-300);
    text-align: center;
    margin-bottom: var(--space-8);
    line-height: 1.5;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero__content {
        gap: var(--space-12);
    }

    .features__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: var(--space-12);
        --card-padding: var(--space-6);
    }
    .page-wrapper {
        padding-top: 68px; /* tamanho real header mobile aproximadamente */
    }
    .header {
        padding: var(--space-3) 0;
        min-height: 56px;
    }
    .nav {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .nav__actions {
        margin-top: var(--space-2);
    }

    .hero {
        padding: calc(var(--space-14) + 20px) 0 var(--space-20) 0; /* mais espaço no topo pra garantir */
    }

    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

    .hero__content {
        flex-direction: column;
        gap: var(--space-12);
        text-align: center;
    }

    .hero__text {
        padding-right: 0;
    }

    .hero__title {
        margin-bottom: var(--space-4);
    }

    .hero__subtitle {
        margin-bottom: var(--space-8);
    }

    .hero__social-proof {
        justify-content: center;
        gap: var(--space-8);
    }

    .features__grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    /* Added extra for mobile card comfort */
    .feature-card,
    .testimonial-card,
    .faq-item {
        padding-left: var(--space-5);
        padding-right: var(--space-5);
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
    }

    .footer__links {
        gap: var(--space-4);
    }
}

@media (max-width: 480px) {
    :root {
        --section-padding: var(--space-8);
        --card-padding: var(--space-5);
    }
    .page-wrapper {
        padding-top: 56px; /* header mínimo mobile estreito */
    }
    .hero {
        padding: calc(var(--space-12) + 24px) 0 var(--space-16) 0;
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .hero__social-proof {
        flex-direction: column;
        gap: var(--space-4);
        align-items: center;
    }

    .social-proof__item {
        min-width: auto;
    }

    .btn--large,
    .btn--extra-large {
        width: 100%;
        max-width: 300px;
    }

    .feature-card,
    .testimonial-card,
    .faq-item {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

    .footer {
        padding: var(--space-12) 0 var(--space-8) 0;
    }

    .footer__links {
        flex-direction: column;
        gap: var(--space-3);
    }
} 

/* Accessibility and Focus States */
.btn:focus,
.nav__link:focus {
    outline: 2px solid var(--whatsapp-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .btn,
    .footer {
        display: none;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .section-title {
        color: black !important;
        border-bottom: 2px solid #000;
        padding-bottom: 10px;
    }
} 

.faq {
    background: var(--neutral-800);
    padding: var(--space-20) 0;
  }
  .faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-10);
  }
  .faq-item {
    background: var(--neutral-900);
    border-radius: var(--space-3);
    padding: var(--space-6);
    border: 1px solid var(--neutral-700);
    box-shadow: 0 2px 8px rgba(37, 211, 102, 0.08);
    transition: box-shadow .2s;
  }
  .faq-item:hover {
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.18);
  }
  .faq-question {
    font-size: 1.13rem;
    font-weight: 600;
    color: var(--whatsapp-primary);
    margin-bottom: var(--space-2);
  }
  .faq-answer {
    color: var(--neutral-300);
    font-size: 1rem;
    line-height: 1.5;
  }