/* ── Reset & Base ─────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem 6rem;
    color: #1a1a2e;
    background: #fafafa;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: inherit;
}

a {
    color: #1a1a2e;
    text-decoration-color: #c0c0d0;
    text-underline-offset: 3px;
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
a:hover {
    color: #4a4a6a;
    text-decoration-color: #4a4a6a;
}

/* ── Header ──────────────────────────────────────── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid #e8e8ee;
}

.logo {
    width: 48px;
    flex-shrink: 0;
}
.logo img {
    width: 48px;
    height: auto;
    opacity: 0.85;
    transition: opacity 0.2s ease;
}
.logo img:hover {
    opacity: 1;
}

/* ── Navigation ──────────────────────────────────── */
.menu ul {
    list-style: none;
    display: flex;
    gap: 0.25rem;
}

.menu li {
    display: inline;
}

.menu a {
    text-decoration: none;
    color: #5a5a7a;
    padding: 0.4em 0.9em;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: background 0.15s ease, color 0.15s ease;
}
.menu a:hover {
    background: #eeeef4;
    color: #1a1a2e;
}

/* ── Article Cards (index) ───────────────────────── */
.article {
    margin: 0 0 1px;
    padding: 1.75rem 0;
    border-bottom: 1px solid #e8e8ee;
}
.article:first-of-type {
    padding-top: 0;
}
.article:last-of-type {
    border-bottom: none;
}

.article h2 {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.35;
    margin: 0;
}
.article h2 a {
    text-decoration: none;
    color: #1a1a2e;
}
.article h2 a:hover {
    color: #4a4a6a;
}

.article p {
    margin: 0.75em 0;
    line-height: 1.7;
    color: #3a3a5a;
}

.article-content-inner {
    padding-top: 0.75em;
    color: #3a3a5a;
}
.article-content-inner img {
    max-width: 100%;
    border-radius: 6px;
    margin: 1em 0;
}

/* ── Timestamp ───────────────────────────────────── */
.timestamp {
    font-size: 0.8rem;
    color: #8a8aa0;
    margin-top: 0.3em;
    letter-spacing: 0.01em;
}

/* ── Pagination ──────────────────────────────────── */
.pagination {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e8e8ee;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75em;
}
.pagination a {
    padding: 0.45em 1em;
    text-decoration: none;
    border: 1px solid #d8d8e4;
    border-radius: 6px;
    color: #3a3a5a;
    font-size: 0.875rem;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.pagination a:hover {
    background: #eeeef4;
    border-color: #c0c0d0;
}
.pagination .current {
    padding: 0.45em 1em;
    background: #1a1a2e;
    color: #fff;
    border-radius: 6px;
    font-size: 0.875rem;
}
.pagination .disabled {
    color: #c0c0d0;
    pointer-events: none;
    border-color: #eeeef4;
}

/* ── Single Post ─────────────────────────────────── */
.post {
    margin: 0;
    padding: 0;
}
.post h1 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.15em;
    color: #1a1a2e;
}
.post h2 {
    display: block;
    font-size: 1.35rem;
    font-weight: 600;
    margin: 1.5em 0 0.5em;
}
.post p {
    margin: 0.75em 0;
    line-height: 1.7;
    color: #3a3a5a;
}
.post-content {
    padding-top: 1.25em;
    color: #3a3a5a;
}
.post-content img {
    max-width: 100%;
    border-radius: 6px;
    margin: 1em 0;
}
.post-content a {
    color: #4a4a6a;
    text-decoration-color: #b0b0c8;
}
.post-content a:hover {
    color: #1a1a2e;
    text-decoration-color: #1a1a2e;
}

/* ── Auth Bar ────────────────────────────────────── */
.auth {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background: rgba(250, 250, 250, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid #e8e8ee;
    text-align: center;
    font-size: 0.75rem;
    padding: 0.4em 0;
    color: #8a8aa0;
}
.auth a {
    color: #5a5a7a;
    text-decoration: none;
    font-weight: 500;
}
.auth a:hover {
    color: #1a1a2e;
}
.auth form {
    display: inline;
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 640px) {
    body {
        padding: 1.25rem 1rem 5rem;
    }

    .logo, .logo img {
        width: 36px;
    }

    .menu a {
        font-size: 0.78rem;
        padding: 0.35em 0.65em;
    }

    .menu ul {
        gap: 0.15rem;
    }

    .header {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }

    .article {
        padding: 1.25rem 0;
    }
    .article h2 {
        font-size: 1.1rem;
    }

    .post h1 {
        font-size: 1.25rem;
    }
}