:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --link-color: #0066cc;
    --accent-color: #f4f4f5;
    --border-color: #e4e4e7;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --max-width: 800px;
    --spacing: 1.5rem;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

header {
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
}

header h1 a {
    color: var(--text-color);
    text-decoration: none;
}

header nav {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
}

header nav a {
    color: #666;
    font-size: 0.95rem;
}

header nav a:hover {
    color: var(--text-color);
}

main {
    min-height: 60vh;
}

article {
    margin-bottom: 4rem;
}

article h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

article h2 a {
    color: var(--text-color);
    text-decoration: none;
}

article h2 a:hover {
    color: var(--link-color);
    text-decoration: none;
}

.post-meta {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.post-summary {
    color: #444;
}

.post-content {
    font-size: 1.1rem;
}

.post-content h2 {
    margin-top: 2rem;
}

.post-content p {
    margin-bottom: 1.5rem;
}

footer {
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    padding: 2rem 0;
    text-align: center;
    color: #888;
    font-size: 0.9rem;
}

/* Login Form */
.login-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: #fafafa;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    box-sizing: border-box;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--text-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
}

.btn:hover {
    background-color: #333;
    text-decoration: none;
}