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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --background: #ffffff;
    --background-alt: #f9fafb;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #000000;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 0.5rem 2rem 0;
    text-align: center;
    background-color: var(--background);
}

.logo {
    max-width: 600px;
    height: auto;
    display: block;
    margin: 0 auto;
}

main {
    flex: 1;
    padding: 0 2rem 2rem;
}

.header-image-link {
    display: block;
    margin: 0;
    text-decoration: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.header-image-link:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.header-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    cursor: pointer;
}

.content {
    text-align: center;
    margin: 2rem 0 3rem;
}

.content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.benefit-item {
    padding: 1.5rem 1rem;
}

.benefit-item strong {
    display: block;
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.benefit-item p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
}

.cta-early {
    max-width: 500px;
    margin: 3rem auto 0;
    text-align: center;
}

.cta-early h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.newsletter-form-inline {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.newsletter-form-inline input[type="email"] {
    flex: 1;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--background);
}

.newsletter-form-inline input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-btn-inline {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    white-space: nowrap;
}

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

.submit-btn-inline:active {
    transform: scale(0.98);
}

.submit-btn-inline:disabled {
    background-color: var(--text-light);
    cursor: not-allowed;
}

.form-note {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

.value-section {
    max-width: 700px;
    margin: 3rem auto;
    padding: 0 2rem;
}

.value-section h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
    text-align: center;
}

.value-intro {
    font-size: 1.125rem;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.value-content {
    background-color: var(--background-alt);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 2rem;
}

.value-content p {
    color: var(--text-color);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.value-content p:last-child {
    margin-bottom: 0;
}

.value-content strong {
    color: var(--text-color);
    font-weight: 600;
}

.value-note {
    font-size: 0.95rem;
    color: var(--text-light);
    text-align: center;
    font-style: italic;
    line-height: 1.6;
}

.bio-section {
    max-width: 700px;
    margin: 3rem auto;
    padding: 2.5rem 2rem;
    background-color: var(--background-alt);
    border-radius: 8px;
    border-top: 3px solid var(--primary-color);
}

.bio-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.bio-content p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.bio-content p:last-child {
    margin-bottom: 0;
}

.bio-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.bio-content a:hover {
    border-bottom-color: var(--primary-color);
}

.signup-section {
    background-color: var(--background-alt);
    padding: 3rem 2rem;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin: 2rem 0;
}

.signup-section h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.signup-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--background);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    margin-top: 0.5rem;
}

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

.submit-btn:active {
    transform: scale(0.98);
}

.submit-btn:disabled {
    background-color: var(--text-light);
    cursor: not-allowed;
}

.form-message {
    margin-top: 1rem;
    padding: 0.875rem;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.form-message.error {
    display: block;
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--error-color);
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        max-width: 100%;
    }

    header {
        padding: 0.5rem 1rem 0;
    }

    .logo {
        max-width: 450px;
    }

    main {
        padding: 0 1rem 1rem;
    }

    .content h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

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

    .benefit-item {
        padding: 1rem 0.5rem;
    }

    .benefit-item strong {
        font-size: 1.125rem;
    }

    .value-section {
        padding: 0 1rem;
        margin: 2rem auto;
    }

    .value-section h2 {
        font-size: 1.75rem;
    }

    .value-intro {
        font-size: 1rem;
    }

    .value-content {
        padding: 1.5rem;
    }

    .value-content p {
        font-size: 0.95rem;
    }

    .cta-early {
        margin: 2rem auto 0;
        padding: 0 1rem;
    }

    .cta-early h3 {
        font-size: 1.25rem;
    }

    .newsletter-form-inline {
        flex-direction: column;
        gap: 0.75rem;
    }

    .submit-btn-inline {
        width: 100%;
        padding: 1rem;
    }

    .bio-section {
        margin: 2rem auto;
        padding: 2rem 1.5rem;
    }

    .bio-section h2 {
        font-size: 1.5rem;
    }

    .bio-content p {
        font-size: 0.95rem;
    }

    .signup-section {
        padding: 2rem 1rem;
        margin: 1rem 0;
    }

    .signup-section h2 {
        font-size: 1.5rem;
    }

    .form-group input {
        padding: 0.75rem;
    }

    .submit-btn {
        padding: 0.875rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .content h1 {
        font-size: 1.75rem;
    }

    .logo {
        max-width: 360px;
    }
}