/* ---------- Reset & Base ---------- */

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

body {
  font-family: Helvetica, Arial, sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.hr {
  border-color: #f5f5f5;
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  background: #337ab7;
  color: #ffffff;
  border-bottom: 1px solid #ddd;
  z-index: 1000;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  color: #ffffff;
  gap: 16px;
}

.header-inner a {
  color: #ffffff;
}

.back {
  font-size: 20px;
  text-decoration: none;
  color: #555;
}

.header-title {
  font-size: 18.5px;
  font-weight: 600;
  white-space: nowrap;
  padding-left: 20px;
}

/* Menu */
.menu {
  display: flex;
  gap: 12px;
  margin-left: auto;
  color: #ffffff;
}

.menu a {
  text-decoration: none;
  font-size: 14px;
  color: #ffffff;
}

.menu a:hover {
  text-decoration: underline;
}

/* Theme toggle */
.theme-toggle {
  margin-left: 8px;
  background: none;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
  color:#ffffff;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ---------- Layout ---------- */

.container {
  max-width: 900px;
  margin: 22px auto;
  padding: 0 16px;
}

.page-title {
  text-align: center;
  font-size: 42px;
  margin-bottom: 40px;
  color: #444;
  transition: color 0.3s ease;
}

/* ---------- Cards ---------- */

.card {
  background: #ffffff;
  border-radius: 8px;
  padding: 22px 26px 28px;
  margin-bottom: 3px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  font-size: 15.2px;
}

.card h1 {  
  font-size: 21.5px;
  margin-bottom: 10px;
}

.card h2 {
  font-size: 19.5px;
  margin-bottom: 10px;

  /* Underline (bottom border) style */
  border-bottom: 1.1px solid #a6cbf7; /* Adjust thickness and color as desired */
  padding-bottom: 1px; /* Space between text and underline */
  padding-left: 8px;

  /* Add some overall padding/margin for better visual appeal */
  padding-top: 0px;
  display: block; /* Ensures the borders span the full width */
}

.card h2::before {
    content: "";
    display: inline-block;

    width: 7px;  /* Thickness of the bar */
    height: 20.5px; /* Height of the bar (matches font-size) */
    background-color: #4e8ef7; /* Darker blue color */

    margin-right: 13px; /* Space between the bar and the text */
    padding-bottom: 0px;
    padding-top: 0px;

    /* Alignment: Ensures the bar sits correctly next to the text */
    vertical-align: middle;
}

.card h3 {
  font-size: 17.5px;
  margin-bottom: 3px;
}

p {
  margin-bottom: 15px;
}

table {
    /* Collapses the borders into a single border line */
    border-collapse: collapse; 
    /* width: 80%; */  /* Optional: Adjusts table width */
    margin-top: 15px; /* Optional: Adds some spacing around the table */
}

/* Apply borders to the table, header cells, and data cells */
table, th, td {
    border: 1px solid #ddd; /* Light gray border color */
    /* border-color:#ddd; */  /* Light gray border color */
    padding: 1.5px 7px; /* Optional: Adds space inside the cells */
    text-align: left; /* Optional: Aligns text to the left */
}

/* Style the table headers (th) */
thead th {
    background-color: #f2f2f2; /* A light shade of gray */
    color: #333; /* Optional: Text color for better contrast */
    font-weight: bold;  /* Optional: Ensures headers are bold */
}

pre {
    font-size: 0.85em;
}

/* Lists */
ul {
  padding-left: 24px;
  list-style-type: disc;
}

ol {
  padding-left: 30px;
}

ul ul {
  padding-left: 15px;
  list-style-type: circle;
}

li {
  /* display: block; */
  padding-left: 1px;
  margin-bottom: 0.6px;
}

/* Links */
a {
  color: #1a73e8;
  transition: color 0.3s ease;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --------- Footer ------- */

.footer {
  font-size:14.5px;
  text-align:right;
  margin: 2px;
}

/* ---------- Dark Mode ---------- */

body.dark {
  background: #121212;
  color: #d6d6d6;
}

body.dark h1,
body.dark h2,
body.dark h3 {
  color: #e0e0e0;
}

body.dark .header {
  background: #1e1e1e;
  /* border-bottom-color: #333; */
  border-bottom: 1px solid #c1c1c1;
}

body.dark .back,
body.dark .menu a {
  color: #ccc;
}

body.dark .theme-toggle {
  border-color: #555;
  color: #e0e0e0;
}

body.dark .page-title {
  color: #eaeaea;
}

body.dark .card {
  background: #1e1e1e;
  box-shadow: 0 2px 8px rgba(0,0,0,0.6);
}

body.dark a {
  color: #8ab4f8;
  text-decoration: none;
}

body.dark a:hover {
  text-decoration: underline;
}

body.dark hr {
  border-color: #848484;
}

body.dark table, 
body.dark th, 
body.dark td {
    border: 1px solid #848484;
}

/* Style the table headers (th) */
body.dark thead th {
    background-color: #adadad; /* A light shade of gray */
    color: #333; /* Optional: Text color for better contrast */
    font-weight: bold;  /* Optional: Ensures headers are bold */
}