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

body {
    font-family:
        "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
    background: #fafaf8;
    color: #333;
    min-height: 100vh;
}

header {
    background: #fff;
    border-bottom: 2px solid #f0c040;
    padding: 12px 24px;
}

.header-contents {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.header-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feed-link {
    font-size: 0.75rem;
    color: #aaa;
    text-decoration: none;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 1px 6px;
}

.feed-link:hover {
    color: #c0682a;
    border-color: #c0682a;
}

.site-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: #c0682a;
    text-decoration: none;
}

.site-title:hover {
    opacity: 0.8;
}

main {
    max-width: 680px;
    margin: 0 auto;
    padding: 24px 16px;
}

/* Post form */
.post-form {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 24px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.post-form form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.post-form textarea {
    width: 100%;
    min-height: 80px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    resize: vertical;
    font-family: inherit;
}

.post-form textarea:focus {
    outline: none;
    border-color: #f0c040;
}

.btn-submit {
    align-self: flex-end;
    padding: 8px 20px;
    background: #f0c040;
    color: #333;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: bold;
    cursor: pointer;
}

.btn-submit:hover {
    background: #e0b030;
}

.error {
    color: #c0392b;
    font-size: 0.9rem;
}

/* Post groups */
.post-groups {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.post-group {
    margin-bottom: 8px;
}

.group-date {
    font-size: 0.95rem;
    font-weight: bold;
    color: #888;
    padding: 6px 0 8px;
    border-bottom: 2px solid #c8c8c0;
    margin-bottom: 0;
    letter-spacing: 0.03em;
}

.post-group-body {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-top: none;
    border-radius: 0 0 10px 10px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

/* 投稿間の破線区切り */
.post-divider {
    border: none;
    border-top: 1px dashed #d8d8d0;
    margin: 0 16px;
}

.empty {
    color: #999;
    text-align: center;
    padding: 32px 0;
}

/* Post card */
.post-card {
    padding: 14px 16px;
}

/* Markdown レンダリング結果 */
.markdown {
    font-size: 1rem;
    line-height: 1.7;
    word-break: break-word;
}

.markdown p {
    margin: 0 0 0.6em;
}

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

.markdown a {
    color: #c0682a;
}

.markdown ul,
.markdown ol {
    margin: 0 0 0.6em 1.4em;
}

.markdown code {
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.88em;
    background: #f4f4f0;
    padding: 0.1em 0.35em;
    border-radius: 3px;
}

.markdown pre {
    background: #f4f4f0;
    padding: 10px 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 0 0 0.6em;
}

.markdown pre code {
    background: none;
    padding: 0;
}

.markdown blockquote {
    border-left: 3px solid #d0d0c8;
    margin: 0 0 0.6em;
    padding: 0 0 0 0.8em;
    color: #888;
}

.markdown h1,
.markdown h2,
.markdown h3 {
    font-weight: bold;
    margin: 0.4em 0;
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
}

.post-meta time {
    font-size: 0.8rem;
    color: #999;
}

.inline {
    display: inline;
}

.post-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-like {
    background: none;
    border: 1px solid #e0d0c0;
    border-radius: 12px;
    padding: 2px 10px;
    font-size: 0.8rem;
    color: #bbb;
    cursor: pointer;
    transition:
        color 0.15s,
        border-color 0.15s,
        background 0.15s;
}

.btn-like:hover {
    border-color: #e08060;
    color: #e08060;
    background: #fff5f0;
}

.btn-like.liked {
    color: #c0392b;
    border-color: #e08060;
    background: #fff5f0;
}

.like-count {
    font-size: 0.8rem;
    color: #c0392b;
}

.btn-permalink {
    background: none;
    border: none;
    padding: 2px 6px;
    font-size: 0.8rem;
    color: #bbb;
    cursor: pointer;
    font-family: monospace;
    border-radius: 4px;
}

.btn-permalink:hover {
    background: #f0f0e8;
    color: #666;
}

.btn-edit {
    display: inline-block;
    background: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 2px 10px;
    font-size: 0.8rem;
    color: #999;
    cursor: pointer;
    text-decoration: none;
    line-height: 1.6;
}

.btn-edit:hover {
    background: #f0f8ff;
    border-color: #5a9fd4;
    color: #2b6cb0;
}

.btn-delete {
    background: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 2px 10px;
    font-size: 0.8rem;
    color: #999;
    cursor: pointer;
}

.btn-delete:hover {
    background: #fee;
    border-color: #c0392b;
    color: #c0392b;
}

/* Edit page */
.edit-heading {
    font-size: 1.1rem;
    font-weight: bold;
    color: #555;
    margin-bottom: 16px;
}

.edit-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
}

.btn-cancel {
    font-size: 0.95rem;
    color: #888;
    text-decoration: none;
}

.btn-cancel:hover {
    color: #555;
    text-decoration: underline;
}

/* Post detail */
.post-detail {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.post-detail .post-body {
    font-size: 1.05rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
    margin-bottom: 16px;
}

.month-heading {
    font-size: 1.2rem;
    font-weight: bold;
    color: #555;
    margin-bottom: 20px;
}

.back-link {
    color: #c0682a;
    text-decoration: none;
    font-size: 0.9rem;
}

.back-link:hover {
    text-decoration: underline;
}