body {
    background-color: #121212;
    color: #e0e0e0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    padding: 24px;
}

.container {
    max-width: 820px;
    margin: 0 auto;
}

.site-header {
    margin-bottom: 24px;
}
.site-header h1 {
    margin: 0 0 6px 0;
    font-size: 32px;
}
.site-tagline {
    margin: 0;
    opacity: 0.8;
}

.post-card {
    background-color: #1e1e1e;
    border: 1px solid #2a2a2a;
    padding: 16px;
    margin: 12px 0;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.06s ease;
    outline: none;
}
.post-card:hover {
    background-color: #262626;
    border-color: #333;
}
.post-card:active {
    transform: scale(0.998);
}

.post-title {
    margin: 0;
    font-size: 24px;
    line-height: 1.2;
}
.post-meta {
    margin: 6px 0 10px 0;
    font-size: 14px;
    opacity: 0.7;
}

.post-excerpt {
    margin: 8px 0 0 0;
    font-size: 18px;
    opacity: 0.9;
    transition: visibility 0.25s, opacity 0.25s ease;
}

.post-content {
    display: none;
    margin-top: 12px;
    font-size: 18px;
    line-height: 1.6;
}

.post-card.active .post-excerpt {
    visibility: hidden;
    opacity: 0;
}
.post-card.active .post-content {
    display: block;
}

.post-card:focus-visible {
    box-shadow: 0 0 0 2px #6aa9ff;
    border-color: #6aa9ff;
}