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

html {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; /* System fonts for speed */
  line-height: 1.5;
  color: #111;
  background-color: #fcfcfc; /* Slight off-white like paper */
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
}

/* Layout */
main {
  max-width: 85ch; /* Wider layout */
  margin: 4rem auto;
  padding: 0 1.5rem;
}

article {
  margin-bottom: 1.5rem;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  margin-top: 0;
  border-bottom: 1px solid #eee;
  padding-bottom: 1rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 3rem;
}

p {
  margin-bottom: 1.5rem;
}

ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Links */
a {
  color: #000;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  background-color: #000;
  color: #fff;
  text-decoration: none;
}

/* Navigation */
nav {
  margin-bottom: 4rem;
  border-bottom: 1px solid #111;
  padding-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.5rem;
}

nav .brand {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
}

/* Note Specifics */
.note-meta {
  font-size: 0.875rem;
  color: #666;
  margin-bottom: 2rem;
  font-family: "Courier New", Courier, monospace;
}

.note-list {
  list-style: none;
  padding: 0;
  border-top: 1px solid #eee;
}

.note-list li {
  border-bottom: 1px solid #eee;
  padding: 1rem 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.note-list a {
  text-decoration: none;
  font-weight: 500;
}

.note-list a:hover {
  background-color: transparent;
  text-decoration: underline;
  color: #000;
}

.note-date {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.875rem;
  color: #666;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid #ccc;
  padding: 0.6rem 0.8rem;
  text-align: left;
}

th {
  background-color: #f5f5f5;
  font-weight: bold;
}

td:first-child {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.85rem;
  color: #555;
  white-space: nowrap;
}

@media (max-width: 640px) {
  table {
    font-size: 0.8rem;
  }
  th, td {
    padding: 0.4rem 0.5rem;
  }
}

/* Footer */
footer {
  margin-top: 4rem;
  padding: 2rem 0 1rem;
  border-top: 1px solid #e0e0e0;
  font-size: 0.78rem;
  color: #999;
  line-height: 1.6;
}

footer p {
  margin: 0.2rem 0;
}

/* Utilities */
.mono {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9em;
}

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  main {
    margin: 2rem auto;
  }
}