/* Base styles */
:root {
  /* Site colours resolve to the portfolio's category palette (assets/theme-tokens.css, ember),
     dark by default; the header toggle (assets/theme-toggle.js) pins the light variant. */
  --primary-color: var(--accent);
  --secondary-color: var(--accent-2);
  --accent-color: var(--accent-2);
  --dark-color: var(--text);
  --light-color: var(--panel);
  --grey-color: var(--muted);
  --success-color: var(--ok);
  --warning-color: var(--warn);
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Manrope', sans-serif;
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--dark-color);
  background-color: var(--bg);
  background-image: linear-gradient(135deg, var(--bg) 0%, var(--panel-2) 100%);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

h1 {
  font-size: 3.2rem;
  font-weight: 700;
}

h2 {
  font-size: 2.4rem;
  font-weight: 600;
}

h3 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Site Header */
.site-header {
  background-color: var(--panel);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}

.main-nav a {
  color: var(--dark-color);
  font-weight: 500;
  padding: 0.5rem;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  text-decoration: none;
}

/* Main Content */
.main-content {
  padding: 3rem 0;
}

.tagline {
  font-size: 1.8rem;
  color: var(--secondary-color);
  opacity: 0.8;
  margin-bottom: 2rem;
}

/* Course Card */
.course-card {
  background-color: var(--panel);
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  margin-bottom: 3rem;
  transition: transform 0.3s, box-shadow 0.3s;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

/* Featured Sections */
.featured-sections {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.section-card {
  background-color: var(--panel);
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  transition: transform 0.3s, box-shadow 0.3s;
  height: 100%;
}

.section-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.section-card h3 {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 0.5rem;
}

.read-more {
  display: inline-block;
  margin-top: 1rem;
  color: var(--primary-color);
  font-weight: 600;
  position: relative;
}

.read-more:after {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s;
}

.read-more:hover {
  text-decoration: none;
}

.read-more:hover:after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

/* Buttons */
.button {
  display: inline-block;
  background-color: var(--primary-color);
  color: var(--on-accent);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.3s;
  margin-right: 1rem;
  margin-top: 1rem;
  border: 2px solid var(--primary-color);
}

.button:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  text-decoration: none;
  color: var(--on-accent);
}

.button-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.button-outline:hover {
  background-color: var(--primary-color);
  color: var(--on-accent);
}

/* Footer */
.site-footer {
  background-color: var(--panel-2);
  color: var(--text);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .featured-sections {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .tagline {
    font-size: 1.4rem;
  }
}

/* Unpublished items: shown as plain, non-interactive notes rather than dead links */
.is-pending { opacity: 0.75; }
.button.is-pending { cursor: default; }
.module-schedule { padding-left: 1.25rem; }
.module-schedule li { margin: 0.4rem 0; }
.site-footer a { color: inherit; }