:root {
    --bg: #0f172a;
    --fg: #f8fafc;
    --accent: #38bdf8;
    --muted: #94a3b8;
    --card: #1e293b;
}

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

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

.hero {
    text-align: center;
    padding: 8rem 1rem 5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.25rem;
    color: var(--muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.15s, opacity 0.15s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn:hover { transform: translateY(-2px); }

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

.btn-secondary {
    background: var(--card);
    color: var(--fg);
    border: 1px solid #334155;
}

.newsletter {
    max-width: 480px;
    margin: 0 auto;
    padding: 4rem 1rem;
    text-align: center;
}

.newsletter h2 { font-size: 1.875rem; margin-bottom: 0.5rem; }

.signup-form {
    display: flex;
    gap: 0.5rem;
    margin: 1.5rem 0 1rem;
    flex-wrap: wrap;
}

.signup-form input {
    flex: 1;
    min-width: 240px;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    border: 1px solid #334155;
    background: var(--card);
    color: var(--fg);
    font-size: 1rem;
}

.signup-form input:focus {
    outline: none;
    border-color: var(--accent);
}

.signup-form button {
    font-size: 1rem;
}

.muted { color: var(--muted); font-size: 0.875rem; }

.features {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 1rem;
}

.features h2 {
    text-align: center;
    font-size: 1.875rem;
    margin-bottom: 2.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.feature {
    background: var(--card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #334155;
}

.feature h3 {
    color: var(--accent);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.feature p { color: var(--muted); }

.pricing {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 1rem;
    text-align: center;
}

.pricing h2 {
    font-size: 1.875rem;
    margin-bottom: 0.5rem;
}

.pricing-sub {
    color: var(--muted);
    margin-bottom: 2.5rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: var(--card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #334155;
    text-align: left;
    display: flex;
    flex-direction: column;
    position: relative;
}

.pricing-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.1);
}

.badge {
    position: absolute;
    top: -12px;
    right: 1.5rem;
    background: var(--accent);
    color: var(--bg);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
}

.pricing-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

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

.pricing-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pricing-card li {
    padding: 0.375rem 0 0.375rem 1.5rem;
    color: var(--muted);
    font-size: 0.9375rem;
    position: relative;
}

.pricing-card li::before {
    content: "\2713";
    color: var(--accent);
    font-weight: 700;
    position: absolute;
    left: 0;
    top: 0.375rem;
    width: 1rem;
    text-align: center;
}

.pricing-card .btn {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: auto;
    font-family: inherit;
}

.pricing-card button.btn {
    border: none;
    outline: none;
}

footer {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--muted);
    font-size: 0.875rem;
    border-top: 1px solid #1e293b;
}

@media (max-width: 600px) {
    .hero h1 { font-size: 2.25rem; }
    .hero { padding-top: 5rem; }
}