:root {
    --primary: #0a192f;
    --primary-light: #172a46;
    --secondary: #00b4d8;
    --accent: #fbbf24;
    --text-main: #334155;
    --text-light: #94a3b8;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--primary);
    line-height: 1.2;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--secondary);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(0, 180, 216, 0.39);
}

.btn-primary:hover {
    background-color: #0096c7;
    transform: translateY(-2px);
}

.btn-accent {
    background-color: var(--accent);
    color: var(--primary);
    box-shadow: 0 4px 14px 0 rgba(251, 191, 36, 0.39);
}

.btn-accent:hover {
    background-color: #f59e0b;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background-color: var(--primary);
    color: var(--white);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.6;
    /* Subtle effect */
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 10;
}

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero .tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

/* Section General */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Learning Points */
.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--secondary);
}

/* Target Audience */
.audience {
    background-color: var(--white);
}

.check-list li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.check-list li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--secondary);
    color: white;
    border-radius: 50%;
    margin-right: 1rem;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* Difference Section */
.difference {
    background-color: var(--primary-light);
    color: var(--white);
}

.difference h2 {
    color: var(--white);
}

.difference p {
    color: var(--text-light);
}

/* Pricing */
.pricing-card {
    background: var(--white);
    max-width: 500px;
    margin: 0 auto;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 2px solid var(--accent);
    position: relative;
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--primary);
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.875rem;
}

.price-old {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 1.25rem;
}

.price-new {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin: 0.5rem 0 1.5rem;
}

.price-new span {
    font-size: 1.5rem;
    font-weight: 600;
}

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

.testimonial-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.testimonial-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.testimonial-header img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 1rem;
    border: 2px solid var(--secondary);
}

.testimonial-header h4 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.stars {
    font-size: 0.875rem;
}

/* Author */
.author-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.author-img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* FAQ */
.faq-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--secondary);
}

.faq-item.active .faq-question::after {
    content: "-";
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding-bottom: 1.5rem;
    max-height: 200px;
}

/* Footer */
footer {
    background-color: var(--primary);
    color: var(--text-light);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.875rem;
}

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

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

/* Card Animations */
.reveal-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

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

/* Staggered delays for cards */
.reveal-card:nth-child(1) {
    transition-delay: 0.1s;
}

.reveal-card:nth-child(2) {
    transition-delay: 0.2s;
}

.reveal-card:nth-child(3) {
    transition-delay: 0.3s;
}

.reveal-card:nth-child(4) {
    transition-delay: 0.4s;
}

.reveal-card:nth-child(5) {
    transition-delay: 0.5s;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

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

    .author-img {
        max-width: 400px;
        margin: 0 auto;
    }

    /* Center author button on mobile */
    #autor .author-grid>div:last-child>div:last-child {
        text-align: center;
    }
}