:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    line-height: 1.5;
    background-color: var(--white);
}

header {
    padding: 1.5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary);
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-light);
    background: #f3f4f6;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}

.hero {
    text-align: center;
    padding: 5rem 1rem;
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.highlight {
    color: var(--primary);
}

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

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

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
}

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

.btn-secondary {
    background-color: var(--white);
    color: var(--text-dark);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    border: 1px solid #d1d5db;
}

.tool-section {
    background-color: var(--bg-light);
    padding: 5rem 1rem;
    text-align: center;
}

.tool-card {
    background: var(--white);
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.tool-card input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
}

.btn-tool {
    width: 100%;
    background: var(--text-dark);
    color: var(--white);
    padding: 0.75rem;
    border: none;
    border-radius: 0.375rem;
    font-weight: 600;
    cursor: pointer;
}

.output-area {
    margin-top: 2rem;
    text-align: left;
}

.email-step {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8fafc;
    border-left: 4px solid var(--primary);
}

.email-body {
    white-space: pre-line;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.pricing-section {
    padding: 5rem 1rem;
    text-align: center;
}

.pricing-card {
    max-width: 400px;
    margin: 3rem auto;
    padding: 3rem 2rem;
    border: 2px solid var(--primary);
    border-radius: 1.5rem;
    position: relative;
}

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

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

.features {
    list-style: none;
    text-align: left;
    margin: 2rem 0;
}

.features li {
    margin-bottom: 0.75rem;
}

.limit {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 1rem;
}

footer {
    padding: 3rem;
    text-align: center;
    border-top: 1px solid #f3f4f6;
    color: var(--text-light);
}

@media (max-width: 640px) {
    h1 { font-size: 2.5rem; }
    .cta-group { flex-direction: column; }
}