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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

header {
    border-bottom: 1px solid #e6e6e6;
    padding: 20px 0;
    margin-bottom: 40px;
}

p {
    margin-bottom: 20px;
}

img {
    max-width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    margin: 0 auto;
    width: auto;
    height: auto;
    border: 0;
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-content {
    text-align: center;
}

.blog-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #000;
}

.blog-subtitle {
    font-size: 16px;
    color: #666;
    font-weight: 400;
}

nav {
    margin-top: 20px;
}

nav a {
    color: #666;
    text-decoration: none;
    margin: 0 15px;
    font-size: 14px;
    transition: color 0.2s;
}

nav a:hover {
    color: #000;
}

.post {
    margin-bottom: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid #e6e6e6;
}

.post:last-child {
    border-bottom: none;
}

.post-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.3;
    color: #000;
}

.post-title a {
    color: inherit;
    text-decoration: none;
}

.post-title a:hover {
    opacity: 0.7;
}

.post-meta {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
}

.post-excerpt {
    font-size: 18px;
    line-height: 1.7;
    color: #333;
    margin-bottom: 16px;
}

.read-more, .back-link {
    color: #666;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

.read-more:hover {
    color: #000;
}

.subscribe-box {
    background-color: #f9f9f9;
    border: 1px solid #e6e6e6;
    padding: 30px;
    margin: 60px 0;
    text-align: center;
}

.subscribe-box h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: #000;
}

.subscribe-box p {
    font-size: 15px;
    color: #666;
    margin-bottom: 20px;
}

.subscribe-form {
    display: flex;
    gap: 10px;
    max-width: 400px;
    margin: 0 auto;
}

.subscribe-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #ccc;
    font-size: 15px;
    border-radius: 4px;
}

.subscribe-form button {
    padding: 12px 24px;
    background-color: #000;
    color: #fff;
    border: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
    margin: 0 auto;
}

.subscribe-form button:hover {
    background-color: #333;
}

footer {
    border-top: 1px solid #e6e6e6;
    padding: 40px 0;
    margin-top: 60px;
    text-align: center;
    color: #666;
    font-size: 14px;
}

@media (max-width: 768px) {
    .blog-title {
        font-size: 24px;
    }

    .post-title {
        font-size: 26px;
    }

    .post-excerpt {
        font-size: 16px;
    }

    .subscribe-form {
        flex-direction: column;
    }

    nav a {
        margin: 0 10px;
    }
}

.archive-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 3rem 0;
}

.archive-title {
    font-size: 2rem;
    font-weight: 700;
    color: #000;
    margin: 0;
    letter-spacing: -0.02em;
}

.archive-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

.sort-buttons {
    display: flex;
    gap: 0.5rem;
}

.sort-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #e6e6e6;
    background: #fff;
    color: #767676;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.sort-btn:hover {
    border-color: #000;
    color: #000;
}

.sort-btn.active {
    background: #000;
    color: #fff;
    border-color: #000;
}

.archive-list {
    display: flex;
    flex-direction: column;
}

.archive-item {
    border-bottom: 1px solid #e6e6e6;
}

.archive-link {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    align-items: center;
    text-decoration: none;
    gap: 1rem;
    transition: opacity 0.15s ease;
}

.archive-link img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 4px;
}

.archive-link:hover {
    opacity: 0.6;
}

.archive-item-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #000;
    margin: 0;
    letter-spacing: -0.01em;
    flex: 1;
}

.archive-item-date {
    font-size: 0.9rem;
    color: #767676;
    white-space: nowrap;
    font-weight: 400;
}

@media (max-width: 768px) {
    .archive-container {
        padding: 2rem 0;
    }

    .archive-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .archive-title {
        font-size: 1.75rem;
    }

    .sort-buttons {
        width: 100%;
    }

    .sort-btn {
        flex: 1;
    }

    .archive-item-title {
        font-size: 1.1rem;
    }

    .archive-link {
        padding: 1rem 0;
    }
}