:root {
    --bg-color: #f7f9fa;
    --text-color: #222d35;
    --heading-color: #11181f;
    --accent-color: #1b4965;
    --accent-hover: #123548;
    --card-bg: #ffffff;
    --border-color: #d0d7de;
    --success-color: #198754;
    --error-color: #b02a37;
    --max-width: 800px;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0d1117;
        --text-color: #c9d1d9;
        --heading-color: #f0f6fc;
        --accent-color: #58a6ff;
        --accent-hover: #79c0ff;
        --card-bg: #161b22;
        --border-color: #30363d;
    }
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

.site-nav {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--heading-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.5rem 0;
}

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

.main-content {
    max-width: var(--max-width);
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex: 1;
}

h1 {
    font-size: 2rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
    line-height: 1.3;
}

h2 {
    font-size: 1.4rem;
    color: var(--heading-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
}

ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

.hero {
    margin-bottom: 2rem;
}

.content-section {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.subscribe-box {
    margin-top: 2rem;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

input[type="email"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    min-height: 44px;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: #ffffff;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    min-height: 44px;
    min-width: 44px;
    line-height: normal;
    text-align: center;
}

@media (prefers-color-scheme: dark) {
    .btn {
        color: #0d1117;
    }
}

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

.form-message {
    margin-top: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.site-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
}

.footer-links {
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

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

.footer-links a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
    }
}