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

article {
    overflow: hidden;
    transition: height 0.4s ease;
    border: 1px solid #ccc;
    padding: 1em;
    margin-bottom: 1em;
    border-radius: 8px;
    position: relative;
}

article:hover {
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: system-ui, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

code {
    font-size: 1.20em;
}

.collapsed-child {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.4s ease;
}

.container {
    width: 90%;
    margin: 0 auto;
    padding: 2rem 0;
}

.expanded-child {
    max-height: 200px; /* enough to show */
    opacity: 1;
}

header, footer {
    background: #222;
    color: #fff;
    padding: 1rem 0;
}

header h1 {
    margin-bottom: 0.5rem;
}

.hero {
    background: #eee;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.narrow-column {
    width: 20%;
    min-width: 20%;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav a {
    color: #fff;
    text-decoration: none;
}

ol {
    margin-left: 3rem;
    margin-bottom: 0.7rem;
}

p {
    margin-bottom: 0.5rem;
}

.posts .post {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #ccc;
}

.post h3 {
    margin-bottom: 0.5rem;
}

.post .meta {
    font-size: 0.7rem;
    color: #666;
}

pre {
    font-size: 1.165em;
    background-color: #777777;
    color: white;
    padding: 1rem;
    margin-bottom: 0.7rem;
}

.strikethrough {
    text-decoration: line-through;
    color: #888;
    position: relative;
    cursor: help;
    transition: color 0.3s ease;
}

.strikethrough:hover {
    color: #666;
}

.strikethrough:hover .tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

table {
    border-collapse: collapse;
    width: 100%;
    font-family: Arial, sans-serif;
    border: none;
    margin-bottom: 1rem;
}

tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

tbody tr:hover {
    background-color: #e0f7fa;
}

td:first-child, th:first-child {
    white-space: nowrap;
}

td:nth-child(2), th:nth-child(2) {
    text-align: left;
}

th, td {
    padding: 0;
    font-family: inherit;
    border: none;
    text-align: left;
}

thead {
    background-color: #f2f2f2;
}

.toggle-btn {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 0.4em 0.8em;
    border-radius: 5px;
    font-size: 0.9em;
    cursor: pointer;
    margin-bottom: 1em;
    transition: background-color 0.3s;
}

.toggle-btn:hover {
    background-color: #0056b3;
}

.toggle-control {
    font-size: 0.85em;
    color: #007bff;
    cursor: pointer;
    margin-left: 1em;
    user-select: none;
    float: right;
}

.toggle-control:hover {
    text-decoration: underline;
}

.tooltip {
    position: absolute;
    top: -50px;
    left: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform: translateX(-50%) translateY(-10px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: #667eea;
}


.wide-column {
    width: 80%;
    min-width: 80%;
}