:root {
    --tabmenu-font: 'Shadows Into Light', cursive;
    --heading-font: 'Shadows Into Light', cursive;
    --body-font: 'Fira Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --code-font: 'Space Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  
    --weight-body: 300;
    --weight-body-strong: 400;
    --weight-heading: 500;
    --weight-tabmenu: 300;
  
    --spacing-body: 0.05em;
    --spacing-tabmenu: 0.10em;
    --spacing-heading: 0.15em;
  
    --lineheight-body: 1.6;
  
    --blue-border: #667D92;
    --text-color: #1c4666;
    --background: #ffffff;
  }
  
  /* Layout */
  
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  html,
  body {
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: var(--body-font);
    font-weight: var(--weight-body);
    letter-spacing: var(--spacing-body);
    line-height: var(--lineheight-body);
    background-color: var(--background);
    color: var(--text-color);
  }
  
  .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 0;
  }
  
  /* Header */
  
  .site-header {
    border: none;
    padding: 0.75rem 1.5rem 0.25rem;
    margin-bottom: 1.25rem;
  }
  
  .header-inner {
    display: flex;
    align-items: stretch;
  }
  
  .logo-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0px 2px 2px;;
    border: 1px solid var(--blue-border);
  }
  
  .logo-emoji {
    display: block;
    width: 75px;
    height: 75px;
    object-fit: contain;
  }
  
  .title-wrapper {
    flex: 1;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding-left: 1rem;
  }
  
  .site-header h1 {
    margin: 0 0 0.2rem;
    font-family: var(--heading-font);
    font-weight: var(--weight-heading);
    letter-spacing: var(--spacing-heading);
    font-size: 1.8rem;
    text-align: right;
  }

  .datestamp {
    display: block;
    text-align: right;
    font-family: var(--body-font);
    font-weight: var(--weight-body);
    letter-spacing: 0.08em;
    font-size: 0.75rem;
    text-transform: lowercase;
    opacity: 0.7;
    margin: -1.0rem 0 -0.5rem;
  }
  
  /* Navigation */
  
  .tab-menu {
    display: flex;
    justify-content: space-around;
    margin: 0.75rem 0 3rem;
    font-family: var(--tabmenu-font);
    font-weight: var(--weight-tabmenu);
    letter-spacing: var(--spacing-tabmenu);
    font-size: 1.2rem;
  }
  
  .tab-link {
    cursor: pointer;
    position: relative;
    padding-bottom: 4px;
    color: var(--text-color);
    transition: opacity 0.2s;
    text-decoration: none;
  }
  
  .tab-link:hover {
    opacity: 0.3;
  }
  
  .tab-link.active-tab::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 2px;
    width: 100%;
    background-color: var(--blue-border);
  }
  
  /* Sections */
  
  .section {
    margin-bottom: 2.5rem;
  }
  
  /* Footer */
  
  .site-footer {
    text-align: center;
    font-size: 0.75rem;
    margin: 2rem 0 1.5rem;
    opacity: 0.7;
  }

  .footer-social {
    display: flex;
    justify-content: center;
    gap: 0.9rem;
    margin-bottom: 0.35rem;
  }
  
  .social-link {
    color: var(--text-color);
    opacity: 0.55;
    display: inline-flex;
    align-items: center;
    transition: opacity 0.2s;
  }
  
  .social-link:hover {
    opacity: 1;
  }
  
  .social-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
  }
  
  .footer-copy {
    opacity: 0.7;
  }
  
  /* Markdown and content */
  
  .markdown-body {
    font-family: var(--body-font);
    font-weight: var(--weight-body);
    letter-spacing: var(--spacing-body);
    line-height: var(--lineheight-body);
  }
  
  .markdown-body h1,
  .markdown-body h2,
  .markdown-body h3 {
    font-family: var(--body-font);
  }
  
  /* # title at top of a page */
  .markdown-body h1 {
    font-family: var(--heading-font);
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 0rem;
    opacity: 0.8;
  }
  
  /* ## main section heading */
  .markdown-body h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--blue-border);
    opacity: 0.8;
  }
  
  /* ### subheading */
  .markdown-body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1rem 0 -1rem;
    opacity: 0.8;
  }
  
  .markdown-body p {
    margin-bottom: 0.75rem;
  }

  .markdown-body a, a:visited {
    color: var(--text-color);
    text-decoration: none;
    opacity: 0.5;
  }

  .markdown-body a:hover {
    opacity: 1.0;
  }
  
  .markdown-body ul,
  .markdown-body ol {
    margin: -0.25rem 0 0 0.5rem;
  }
  
  .markdown-body strong,
  .markdown-body b {
    font-weight: var(--weight-body-strong);
    letter-spacing: 0.05em;
    opacity: 0.8;
  }
  
  .markdown-body hr {
    border: 0;
    border-top: 1px solid var(--blue-border);
    margin: 2rem 0;
    opacity: 0.8;
  }
  
  .markdown-body blockquote {
    margin-left: 1.5rem;
    margin-right: 1.5rem;
    padding: 1rem;
    opacity: 0.6;
    background-color: rgba(12, 42, 66, 0.05);
    border-radius: 6px;
  }

  .markdown-body blockquote p {
    margin: 0.25rem;
  }

  .markdown-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border: 1px solid rgba(12, 42, 66, 0.15);
    border-radius: 6px;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.22);
  }
  
  .markdown-body img.img-half {
    max-width: 50%;
    margin: 1rem auto;
  }
  
  /* Code blocks and inline code */
  
  .markdown-body pre {
    margin: 0;
    background-color: transparent;
    border: none;
    border-radius: 0;
    padding: 0.75rem 1rem 0.9rem;
    overflow-x: auto;
    font-family: var(--code-font);
    font-size: 0.9rem;
  }
  
  .markdown-body code {
    font-family: var(--code-font);
    font-size: 0.9em;
  }
  
  /* Code card wrapper */
  
  .code-block {
    position: relative;
    margin: 1.5rem 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(12, 42, 66, 0.15);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
    background: #f8fafc;
  }
  
  .code-block .code-title {
    margin: 0;
    padding: 0.4rem 0.75rem;
    background: #e3edf5;
    border-bottom: 1px solid rgba(12, 42, 66, 0.08);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
  }
  
  /* Copy code button */
  
  .code-copy {
    position: absolute;
    top: 0.4rem;
    right: 0.6rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--body-font);
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    border: none;
    outline: none;
    background: transparent;
    padding: 0;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 150ms ease, color 150ms ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
  }
  
  .code-copy:hover {
    opacity: 1;
  }
  
  .code-copy-icon {
    width: 0.8em;
    height: 0.8em;
    border: 1px solid currentColor;
    border-radius: 2px;
    box-shadow: -2px 2px 0 0 currentColor;
  }
  
  .code-copy-label {
    white-space: nowrap;
  }

  .code-copy.code-copy-success {
    opacity: 1;
    color: var(--blue-border);
  }
  
  /* Code index in code tab */
  
  .code-index {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
  }
  
  .code-index h3 {
    margin-bottom: 0.5rem;
  }
  
  .code-index ul {
    list-style: disc;
    /* padding-left: 0; */
    margin: 0;
  }
  
  .code-index li {
    margin-bottom: 0.25rem;
  }
  
  .code-index a, a:visited {
    color: var(--text-color);
    text-decoration: none;
    opacity: 0.5;
  }
  
  .code-index a:hover {
    opacity: 1.0;
  }
  
  /* contact form */

.contact-form {
  max-width: 540px;
  margin: 1.5rem 0;
}

.contact-row {
  margin-bottom: 1rem;
}

.contact-row label {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--body-font);
  font-weight: var(--weight-body);
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  text-transform: uppercase;
  opacity: 0.8;
}

.contact-row input,
.contact-row textarea {
  width: 100%;
  padding: 0.45rem 0.6rem;
  font-family: var(--body-font);
  font-size: 0.9rem;
  border: 1px solid rgba(12, 42, 66, 0.3);
  border-radius: 4px;
  outline: none;
}

.contact-row input:focus,
.contact-row textarea:focus {
  border-color: var(--blue-border);
}

.contact-submit {
  margin-top: 0.5rem;
  padding: 0.4rem 0.9rem;
  font-family: var(--heading-font);
  font-weight: var(--weight-heading);
  color: var(--text-color);
  font-size: 1rem;
  letter-spacing: var(--spacing-heading);
  text-transform: lowercase;
  border: 1px solid var(--blue-border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  opacity: 0.7;
}

.contact-submit:hover {
  opacity: 1;
}

/* status message under the form */
.contact-status {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* honeypot: hide from humans, bots will still see the field */
.contact-robot-check {
  position: absolute;
  left: -9999px;
  top: -9999px;
  height: 0;
  overflow: hidden;
}

/* for mobile */

@media (max-width: 600px) {
  .container {
    padding: 1rem 0.75rem 2rem;
  }

  .site-header h1 {
    font-size: 1.4rem;
  }

  .tab-menu {
    flex-wrap: wrap;
    row-gap: 0.25rem;
    font-size: 1rem;
  }

  .tab-link {
    padding: 0 0.25rem 4px;
  }

  .markdown-body {
    font-size: 0.95rem;
  }

  .markdown-body pre {
    font-size: 0.85rem;
  }
}

/* 404 page card */

.notfound-card {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(12, 42, 66, 0.15);
  border-radius: 10px;
  background: #f8fafc;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.notfound-card h1 {
  font-weight: var(--weight-heading);
  font-size: 3rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.notfound-card p {
  text-align: center;
}

@media (max-width: 600px) {
  .notfound-card {
    padding: 1rem 1rem;
  }
}

/* Moonphase styling */

.moonphase-bar {
  margin: 0.75rem 0 3rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid rgba(12, 42, 66, 0.15);
  border-radius: 10px;
  background: #f8fafc;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.moonphase-items {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.moonphase-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  opacity: 0.85;
}

.moonphase-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--blue-border);
  background: transparent;
}

.moon-new {
  background: var(--text-color);
  border-color: var(--text-color);
}

.moon-full {
  background: transparent;
}

.moon-first {
  background: linear-gradient(90deg, var(--text-color) 50%, transparent 50%);
  border-color: var(--text-color);
}

.moon-last {
  background: linear-gradient(90deg, transparent 50%, var(--text-color) 50%);
  border-color: var(--text-color);
}

.moonphase-date {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  opacity: 0.75;
}