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

:root {
    --color-primary: #6c3ce0;
    --color-primary-dark: #5a2dc5;
    --color-bg: #0e0e1a;
    --color-surface: #1a1a2e;
    --color-surface-light: #25253d;
    --color-text: #e2e2f0;
    --color-text-muted: #9999b3;
    --color-accent: #f0c040;
    --radius: 12px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(14, 14, 26, 0.85);
    backdrop-filter: blur(12px);
    z-index: 100;
    padding: 16px 0;
    transition: box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, rgba(108, 60, 224, 0.2) 0%, transparent 70%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 520px;
    margin: 0 auto 36px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--color-primary);
    color: #fff;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.btn:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
}

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

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

/* Sections */
section {
    padding: 100px 0;
}

section h2 {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: 48px;
}

/* Features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--color-surface);
    padding: 36px 28px;
    border-radius: var(--radius);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 30px rgba(108, 60, 224, 0.15);
}

.feature-card.visible:hover {
    transform: translateY(-6px);
}

/* Pricing */
.pricing {
    background: var(--color-surface);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.toggle-label {
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.toggle-label.active {
    color: var(--color-text);
}

.toggle-switch {
    width: 52px;
    height: 28px;
    background: var(--color-surface-light);
    border: 2px solid var(--color-primary);
    border-radius: 14px;
    cursor: pointer;
    position: relative;
    padding: 0;
}

.toggle-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle-switch.yearly .toggle-knob {
    transform: translateX(24px);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: start;
}

.pricing-card {
    background: var(--color-bg);
    padding: 36px 28px;
    border-radius: var(--radius);
    text-align: center;
    border: 2px solid transparent;
    position: relative;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.featured {
    border-color: var(--color-primary);
}

.badge {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 20px;
}

.pricing-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-card li {
    padding: 8px 0;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-surface-light);
}

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

/* Contact */
.contact-form {
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 14px 18px;
    background: var(--color-surface);
    border: 2px solid var(--color-surface-light);
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-status {
    text-align: center;
    font-weight: 600;
    min-height: 24px;
}

.form-status.success {
    color: #4ade80;
}

/* Footer */
.footer {
    padding: 32px 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--color-surface-light);
}

/* Scroll to top */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 50;
}

.scroll-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.scroll-top:hover {
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
    }

    .nav-links.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .feature-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}