/* General Styles */
:root {
    --primary-color: #6a0dad; /* A deep purple, symbolizing intelligence */
    --secondary-color: #9370db; /* A lighter purple for accents */
    --dark-bg: #1a1a2e; /* Dark background for sections */
    --light-bg: #ffffff; /* Light background for sections */
    --text-color: #333333;
    --light-text-color: #f0f0f0;
    --accent-color: #00bcd4; /* A vibrant blue for calls to action */
    --border-radius: 8px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

.section {
    padding: 80px 5%;
    text-align: center;
}

.section.dark-bg {
    background-color: var(--dark-bg);
    color: var(--light-text-color);
}

h1, h2, h3 {
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--primary-color);
}

.dark-bg h1, .dark-bg h2, .dark-bg h3 {
    color: var(--light-text-color);
}

p {
    margin-bottom: 15px;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background-color: #0097a7;
}

.cta-button.secondary {
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.cta-button.secondary:hover {
    background-color: var(--accent-color);
    color: white;
}

/* Header & Navigation */
header {
    background-color: var(--dark-bg);
    color: var(--light-text-color);
    padding: 20px 5%;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--light-text-color);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--light-text-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--light-text-color);
    margin: 5px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 5% 80px;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5em;
    margin-bottom: 25px;
    color: var(--light-text-color);
}

.hero p {
    font-size: 1.3em;
    margin-bottom: 40px;
    color: var(--light-text-color);
}

/* Features Section */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.feature-item {
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: left;
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.dark-bg .feature-item {
    background-color: #2b2b48;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.dark-bg .feature-item h3 {
    color: var(--accent-color);
}

/* How It Works Section */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.step-item {
    text-align: center;
    color: var(--light-text-color);
}

.step-item span {
    display: inline-block;
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    background-color: var(--primary-color);
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.step-item h3 {
    color: var(--light-text-color);
    margin-bottom: 10px;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.price-card {
    background-color: var(--light-bg);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: left;
    transition: transform 0.3s ease, border-color 0.3s ease;
    border: 2px solid transparent;
}

.price-card.popular {
    border-color: var(--accent-color);
    transform: translateY(-15px);
}

.price-card:hover:not(.popular) {
    transform: translateY(-10px);
}

.price-card h3 {
    font-size: 1.8em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.price-card .price {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.price-card .price span {
    font-size: 0.5em;
    font-weight: 400;
    color: var(--text-color);
}

.price-card ul {
    list-style: none;
    margin-bottom: 30px;
}

.price-card ul li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

.price-card ul li::before {
    content: '✓';
    color: var(--accent-color);
    position: absolute;
    left: 0;
    top: 0;
}

/* Contact Section */
.contact-form {
    max-width: 600px;
    margin: 50px auto 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input, .contact-form textarea {
    padding: 15px;
    border: 1px solid #555;
    border-radius: var(--border-radius);
    background-color: #33334f;
    color: var(--light-text-color);
    font-family: 'Inter', sans-serif;
    font-size: 1em;
}

.contact-form input::placeholder, .contact-form textarea::placeholder {
    color: #bbb;
}

.contact-form button {
    align-self: flex-start;
}

/* Footer */
footer {
    background-color: #111;
    color: var(--light-text-color);
    text-align: center;
    padding: 30px 5%;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: 92vh;
        top: 8vh;
        background-color: var(--dark-bg);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        z-index: 10;
    }

    .nav-links.nav-active {
        transform: translateX(0%);
    }

    .nav-links li {
        opacity: 0;
        margin: 25px 0;
    }

    .burger {
        display: block;
    }

    .hero h1 {
        font-size: 2.5em;
    }

    .hero p {
        font-size: 1em;
    }

    .feature-grid, .steps-grid, .pricing-grid {
        grid-template-columns: 1fr;
    }

    .price-card.popular {
        transform: translateY(0);
    }
}

/* Burger Animation */
.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2 {
    opacity: 0;
}
.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}