:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --primary-color: #000000;
    --secondary-color: #f5f5f5;
    --accent-color: #333333;
    --border-color: #e0e0e0;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    margin-bottom: 1rem;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 0.8rem 5%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}

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

.nav-links li {
    margin: 0 1.5rem;
}

.nav-links a {
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Buttons */
.btn-primary, .btn-outline {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-color);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

/* Hamburger */
.hamburger {
    display: none;
    cursor: pointer;
}

.line {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px;
    transition: var(--transition);
}

/* Sections */
.section {
    padding: 5rem 5%;
}

.bg-light {
    background-color: var(--secondary-color);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--primary-color);
    margin: 10px auto 0;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    overflow: hidden;
}

.hero-content {
    z-index: 2;
    max-width: 800px;
    animation: fadeIn 1.5s ease;
}

.hero h1 {
    font-size: 4rem;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

/* Cards */
.card {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Pricing */
.pricing-card {
    position: relative;
    padding: 3rem 2rem;
}

.pricing-card.popular {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 1rem 0;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
}

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

.pricing-features li {
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.5rem;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Reviews */
.review-card {
    text-align: left;
}

.stars {
    color: #000;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.author {
    margin-top: 1rem;
    font-weight: 600;
    color: var(--accent-color);
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 1rem 0;
}

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

.faq-answer p {
    padding-bottom: 1rem;
    color: var(--accent-color);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .toggle {
    transform: rotate(45deg);
}

.toggle {
    transition: transform 0.3s ease;
    font-size: 1.5rem;
}

/* Knowledge Base */
.kb-card {
    display: block;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    transition: var(--transition);
}

.kb-card:hover {
    background: var(--primary-color);
    color: var(--bg-color);
}

.kb-card h4 {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: white;
    padding: 2rem 5%;
    text-align: center;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: white;
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Glitch Effect */
.glitch {
    position: relative;
}
.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
}
.glitch::before {
    left: 2px;
    text-shadow: -1px 0 #888;
    animation: glitch-anim 2s infinite linear alternate-reverse;
}
.glitch::after {
    left: -2px;
    text-shadow: 1px 0 #555;
    animation: glitch-anim-2 3s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip-path: inset(20% 0 80% 0); }
    20% { clip-path: inset(60% 0 10% 0); }
    40% { clip-path: inset(40% 0 50% 0); }
    60% { clip-path: inset(80% 0 5% 0); }
    80% { clip-path: inset(10% 0 70% 0); }
    100% { clip-path: inset(30% 0 20% 0); }
}

@keyframes glitch-anim-2 {
    0% { clip-path: inset(10% 0 60% 0); }
    20% { clip-path: inset(30% 0 20% 0); }
    40% { clip-path: inset(70% 0 10% 0); }
    60% { clip-path: inset(20% 0 50% 0); }
    80% { clip-path: inset(50% 0 30% 0); }
    100% { clip-path: inset(5% 0 80% 0); }
}

/* Responsive */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0px;
        height: 100vh;
        top: 0;
        background-color: var(--bg-color);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        padding-top: 100px;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .nav-links li {
        margin: 2rem 0;
    }

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

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .nav-btn {
        display: none;
    }

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

    .pricing-card.popular {
        transform: scale(1);
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }
}