:root {
  /* Used so the instructions sidebar sticks below the pinned nav */
  --nav-sticky-offset: 52px;
}

body {
  background-color: #0f0f23;
  color: #33ffcc;  /* ← was #ff66cc */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}


nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #1a1a2e;
  padding: 10px;
  width: 100%;
  box-sizing: border-box;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.navbar {
  list-style: none;
  display: flex;
  justify-content: space-around;
  margin: 0;
  padding: 0;
}

.navbar li a {
  text-decoration: none;
  color: #33ffcc;  /* ← was #ff66cc */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  font-weight: bold;
  transition: all 0.3s ease;
  text-shadow: 0 0 4px #33ffcc;  /* subtle teal glow */
}


.navbar li a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px #ff66cc, 0 0 20px #ff1ab3, 0 0 30px #ff1ab3;
  transform: scale(1.05);
}

main {
  padding: 40px;
  text-align: center;
}

h1, h2 {
  color: #33ffcc;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  text-shadow: 0 0 5px #ff66cc, 0 0 10px #ff1ab3;
}

h3 {
  color: #ff66cc;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  text-shadow: 0 0 4px #ff66cc;
  margin: 1.25rem 0 0.5rem;
}

/* Long-form pages (e.g. final project guide): readable column, left-aligned body */
main.main-narrow {
  max-width: 52rem;
  margin: 0 auto;
  text-align: left;
}

main.main-narrow > h1,
main.main-narrow > .page-subtitle {
  text-align: center;
}

.page-subtitle {
  color: #ff99cc;
  font-size: 18px;
  line-height: 1.6;
  margin: 0 0 1.75rem;
}

.assignment-box strong {
  color: #ff66cc;
}

/* Section table (final project report guide) */
.report-sections-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.report-sections-table th,
.report-sections-table td {
  border: 1px solid #ff66cc;
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  color: #33ffcc;
}

.report-sections-table th {
  background-color: #1a1a2e;
  color: #ff66cc;
  font-weight: bold;
  text-shadow: 0 0 4px #ff66cc;
}

.report-sections-table td strong {
  color: #ff66cc;
}

p, li, ul {
  font-size: 18px;
  line-height: 1.6;
  color: #33ffcc;  /* ← was #ff66cc or #ff99cc */
}


ul {
  padding-left: 20px;
}

img {
  margin-bottom: 30px;
  box-shadow: 0 0 15px #ff1ab3;
  border-radius: 10px;
  max-width: 100%;
  height: auto;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
  transform: scale(1.02);
  box-shadow: 0 0 30px #ff1ab3;
}
.wrapper {
  display: flex;
  flex-direction: row;
  min-height: 100vh;
}

.sidebar {
  width: 200px;
  background-color: #1a1a2e;
  padding: 20px;
  position: sticky;
  top: var(--nav-sticky-offset);
  height: calc(100vh - var(--nav-sticky-offset));
  overflow-y: auto;
  z-index: 100;
}

.sidebar a {
  display: block;
  color: #ff66cc;
  padding: 10px 0;
  text-decoration: none;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  font-weight: bold;
  transition: all 0.2s ease;
  text-shadow: 0 0 3px #ff66cc;
}

.sidebar a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px #ff66cc, 0 0 20px #ff1ab3;
}

.content {
  flex-grow: 1;
  padding: 40px;
}
.accordion-container {
  margin: 40px auto;
  max-width: 700px;
}

.accordion {
  background-color: #1a1a2e;
  border: 1px solid #ff66cc;
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.accordion-btn {
  background-color: transparent;
  color: #ff66cc;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  padding: 15px;
  text-align: left;
  width: 100%;
  border: none;
  outline: none;
  font-size: 18px;
  line-height: 1.6;
  cursor: pointer;
  text-shadow: 0 0 4px #ff66cc;
  transition: background 0.2s ease;
}

.accordion-btn:hover {
  background-color: #2c2c3e;
  text-shadow: 0 0 8px #ff1ab3;
}

.panel {
  padding: 0 15px 15px;
  background-color: #0f0f23;
  display: none;
  color: #ff99cc;
  font-size: 18px;
  line-height: 1.6;
}

.schedule-header {
  margin-top: 40px;
  color: #33ffcc;
  text-align: center;
}

.schedule-note {
  font-size: 18px;
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto 30px;
  text-align: center;
  color: #33ffcc;  /* ← was #ff99cc */
}

.assignment-box {
  background-color: #1a1a2e;
  border: 1px solid #ff66cc;
  border-radius: 10px;
  padding: 20px;
  margin: 30px 0;
  box-shadow: 0 0 10px #ff1ab3;
}

.assignment-box h2 {
  color: #ff66cc;
  margin-bottom: 10px;
}

.assignment-box ul {
  padding-left: 20px;
  color: #33ffcc;  /* ← was #ff99cc */
}

.assignment-box p {
  color: #33ffcc;  /* ← was #ff99cc */
}

.colab-link img {
  height: 20px;
  vertical-align: middle;
}

table, th, td {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}

code {
  font-family: Consolas, Monaco, 'Courier New', monospace;
  font-size: 16px;
  line-height: 1.6;
  background-color: #1a1a2e;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid #33ffcc;
}

/* Block-style code box for terminal commands */
pre.terminal {
  background-color: #1a1a2e;
  border: 1px solid #33ffcc;
  border-radius: 6px;
  padding: 12px 16px;
  margin: 8px 0;
  overflow-x: auto;
}

pre.terminal code {
  background: none;
  padding: 0;
  border: none;
  font-size: 16px;
}

a {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}

ol {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}