:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --bg-color: #020617;
    --card-bg: #0f172a;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
}

.logo span {
    color: var(--primary-color);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.control-item {
    padding: 0.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-main);
    cursor: pointer;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

main {
    padding: 4rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.05em;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Tool Section */
.generator-card {
    background: var(--card-bg);
    border-radius: 1.5rem;
    padding: 3rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    margin-bottom: 5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

input, textarea, select {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    background: var(--bg-color);
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
}

.cta-button {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 700;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: background 0.2s;
}

.cta-button:hover {
    background: var(--primary-hover);
}

/* Stats Section */
.stats-section {
    display: flex;
    justify-content: space-around;
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 5rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Testimonials */
.testimonials {
    margin-bottom: 6rem;
}

.testimonials h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 3rem;
    letter-spacing: -0.03em;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.testimonial-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.testimonial-card p {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info strong {
    font-size: 1rem;
}

.user-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Newsletter */
.newsletter-section {
    background: linear-gradient(135deg, var(--primary-color), #6366f1);
    padding: 5rem 3rem;
    border-radius: 2rem;
    color: white;
    text-align: center;
}

.newsletter-content h3 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.newsletter-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2.5rem;
}

.newsletter-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 1rem;
}

.newsletter-form input {
    background: white;
    color: black;
    border: none;
}

.newsletter-form button {
    background: #0f172a;
    width: auto;
    padding: 0 2rem;
}

/* Footer */
footer {
    padding: 5rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
}

footer p {
    font-size: 0.8rem;
    color: #94a3b8;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .form-grid, .testimonial-grid, .stats-section {
        grid-template-columns: 1fr;
        flex-direction: column;
        gap: 2rem;
    }
    .newsletter-form {
        flex-direction: column;
    }
}