/* Carolyn Merchant Faculty Site - UC Berkeley Branded */
/* WCAG 2.1 AA Compliant */

:root {
  /* UC Berkeley brand colors - adjusted for WCAG AA contrast */
  --berkeley-blue: #003262;
  --california-gold: #FDB515;
  --founders-rock: #2B6A90; /* Darkened from #3B7EA1 for 4.5:1 contrast */
  --bay-fog: #DDD5C7;
  --lawrence: #00B0DA;
  --white: #FFFFFF;
  --black: #000000;
  --gray-light: #F5F5F5;
  --gray-dark: #595959; /* Darkened from #666666 for 4.5:1 contrast */
  --text-color: #222222;
  --focus-color: #FDB515; /* California Gold for focus indicator */
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--white);
}

/* Skip Link - Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--berkeley-blue);
  color: var(--white);
  padding: 0.5rem 1rem;
  z-index: 100;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--focus-color);
  outline-offset: 2px;
}

/* Visually hidden but accessible to screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus Indicators - Accessibility */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 3px solid var(--focus-color);
  outline-offset: 2px;
}

/* Remove outline for mouse users, keep for keyboard */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-color);
  outline-offset: 2px;
}

/* Header */
header {
  background-color: var(--berkeley-blue);
  color: var(--white);
  padding: 1.5rem 0;
  border-bottom: 4px solid var(--california-gold);
}

.header-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header with Photo */
.header-with-photo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.header-photo {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--california-gold);
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

header .subtitle {
  font-size: 1rem;
  color: var(--white); /* Changed from bay-fog for better contrast */
  opacity: 0.9;
}

/* Navigation */
nav {
  background-color: var(--founders-rock);
}

nav ul {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
}

nav li {
  margin: 0;
}

nav a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.2s;
}

nav a:hover,
nav a:focus,
nav a.active,
nav a[aria-current="page"] {
  background-color: var(--berkeley-blue);
}

nav a:focus {
  outline-offset: -3px;
}

/* Main Content */
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: calc(100vh - 300px);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--berkeley-blue);
  margin-bottom: 1rem;
  line-height: 1.3;
}

h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--california-gold);
  padding-bottom: 0.5rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--founders-rock);
  text-decoration: underline; /* Always underline links for accessibility */
}

a:hover {
  color: var(--berkeley-blue);
}

/* External link indicator */
a[target="_blank"]::after {
  content: " (opens in new tab)";
  font-size: 0;
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Visual external link icon (optional, visible) */
.external-link::after {
  content: " ↗";
  font-size: 0.75em;
  vertical-align: super;
}

/* Lists */
ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Publication/Article Lists */
.pub-list {
  list-style: none;
  padding-left: 0;
}

.pub-list li {
  margin-bottom: 1rem;
  padding-left: 2rem;
  text-indent: -2rem;
}

.pub-list .year {
  font-weight: 600;
  color: var(--berkeley-blue);
}

.pub-list .title {
  font-style: italic;
}

.pub-list a {
  color: var(--founders-rock);
}

.pub-list a:hover {
  color: var(--berkeley-blue);
}

/* PDF Links */
.pdf-link {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background-color: var(--gray-light);
  border-radius: 3px;
  font-size: 0.875rem;
  margin-left: 0.5rem;
  text-decoration: none;
  border: 1px solid var(--gray-dark);
}

.pdf-link:hover,
.pdf-link:focus {
  background-color: var(--california-gold);
  text-decoration: none;
  border-color: var(--berkeley-blue);
}

/* Bio/Profile Section */
.profile-section {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.profile-photo {
  flex-shrink: 0;
}

.profile-photo img {
  max-width: 200px;
  height: auto;
  border: 3px solid var(--berkeley-blue);
}

.profile-info {
  flex: 1;
}

/* Home Page Profile Intro */
.profile-intro {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.profile-intro .profile-photo {
  max-width: 180px;
  height: auto;
  border: 3px solid var(--berkeley-blue);
  border-radius: 4px;
  flex-shrink: 0;
}

.profile-intro .profile-text {
  flex: 1;
}

.profile-intro .profile-text h2 {
  margin-top: 0;
}

@media (max-width: 600px) {
  .profile-intro {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-intro .profile-photo {
    max-width: 150px;
  }
}

/* Contact Info */
.contact-info {
  background-color: var(--gray-light);
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--california-gold);
  margin-bottom: 1.5rem;
}

.contact-info p {
  margin-bottom: 0.25rem;
}

/* Archive Notice */
.archive-notice {
  background-color: #FFF8E1;
  border: 1px solid var(--california-gold);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 4px;
}

.archive-notice strong {
  color: var(--berkeley-blue);
}

/* Book Sections */
.book-section {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--bay-fog);
}

.book-section:last-child {
  border-bottom: none;
}

.book-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--berkeley-blue);
  font-style: italic;
}

/* Tables (for CV) */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

th, td {
  padding: 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--bay-fog);
}

th {
  background-color: var(--berkeley-blue);
  color: var(--white);
}

/* Footer */
footer {
  background-color: var(--berkeley-blue);
  color: var(--white);
  padding: 1.5rem 0;
  margin-top: 3rem;
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}

footer a {
  color: var(--california-gold);
}

footer .berkeley-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-photo {
    width: 100px;
    height: 100px;
  }

  header h1 {
    font-size: 1.5rem;
  }

  nav ul {
    flex-direction: column;
  }

  nav a {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .profile-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-photo img {
    max-width: 150px;
  }

  main {
    padding: 1.5rem 1rem;
  }

  h2 {
    font-size: 1.25rem;
  }
}

/* Print Styles */
@media print {
  header, nav, footer, .skip-link {
    display: none;
  }

  main {
    max-width: 100%;
    padding: 0;
  }

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

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }

  .pdf-link {
    display: none;
  }
}

/* Reduced Motion - Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===========================================
   COURSE PAGES
   =========================================== */

/* Course Sub-Navigation */
.course-nav {
  background-color: var(--bay-fog);
  border-bottom: 2px solid var(--california-gold);
}

.course-nav ul {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.course-nav li {
  margin: 0;
}

.course-nav a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--berkeley-blue);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 3px;
}

.course-nav a:hover,
.course-nav a:focus,
.course-nav a[aria-current="page"] {
  background-color: var(--berkeley-blue);
  color: var(--white);
}

/* Archive Banner */
.archive-banner {
  background-color: #FFF3CD;
  border: 1px solid #FFECB5;
  border-left: 4px solid var(--california-gold);
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  border-radius: 0 4px 4px 0;
}

.archive-banner strong {
  color: var(--berkeley-blue);
}

/* Course Cards */
.course-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.course-card {
  background-color: var(--gray-light);
  border: 1px solid var(--bay-fog);
  border-left: 4px solid var(--founders-rock);
  padding: 1.5rem;
  border-radius: 0 4px 4px 0;
}

.course-card h3 {
  margin-top: 0;
  color: var(--berkeley-blue);
}

.course-card p {
  margin-bottom: 1rem;
  color: var(--gray-dark);
}

.course-card a {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--berkeley-blue);
  color: var(--white);
  text-decoration: none;
  border-radius: 3px;
}

.course-card a:hover,
.course-card a:focus {
  background-color: var(--founders-rock);
}

/* Lecture List */
.lecture-list {
  list-style: none;
  padding: 0;
}

.lecture-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--bay-fog);
}

.lecture-list li:last-child {
  border-bottom: none;
}

.lecture-list a {
  font-weight: 500;
}

.lecture-list .week-label {
  display: inline-block;
  width: 80px;
  font-weight: 600;
  color: var(--berkeley-blue);
}

/* Slide Gallery */
.slide-gallery {
  margin: 2rem 0;
}

.slides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.slides-grid a {
  display: block;
  border: 2px solid var(--bay-fog);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.slides-grid a:hover,
.slides-grid a:focus {
  border-color: var(--california-gold);
}

.slides-grid img {
  width: 100%;
  height: auto;
  display: block;
}

.slide-number {
  display: block;
  text-align: center;
  padding: 0.25rem;
  background-color: var(--gray-light);
  font-size: 0.8rem;
  color: var(--gray-dark);
}

/* Study Guide Styles */
.study-questions {
  background-color: var(--gray-light);
  padding: 1.5rem;
  border-radius: 4px;
  margin: 1.5rem 0;
}

.study-questions h4 {
  margin-top: 0;
  color: var(--berkeley-blue);
}

.study-questions ol {
  margin-bottom: 0;
}

.study-questions li {
  margin-bottom: 0.75rem;
}

/* Course Content */
.course-content h4 {
  color: var(--berkeley-blue);
  margin-top: 1.5rem;
  border-bottom: 1px solid var(--bay-fog);
  padding-bottom: 0.5rem;
}

.course-content ul {
  margin-bottom: 1.5rem;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.9rem;
  margin-bottom: 1rem;
  color: var(--gray-dark);
}

.breadcrumb a {
  color: var(--founders-rock);
}

.breadcrumb span {
  margin: 0 0.5rem;
}

/* Course Page Responsive */
@media (max-width: 768px) {
  .course-nav ul {
    flex-direction: column;
  }

  .course-nav a {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(0, 50, 98, 0.1);
  }

  .slides-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .lecture-list .week-label {
    display: block;
    width: auto;
    margin-bottom: 0.25rem;
  }
}

/* Lecture Outline Styles */
.lecture-outline h2 {
  color: var(--berkeley-blue);
  border-bottom: 3px solid var(--california-gold);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.lecture-outline h4 {
  color: var(--berkeley-blue);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.lecture-outline ul {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.lecture-outline ul ul {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.lecture-outline li {
  margin-bottom: 0.4rem;
}

/* Outline Navigation */
.outline-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--bay-fog);
}

.outline-nav a {
  color: var(--founders-rock);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid var(--founders-rock);
  border-radius: 4px;
  transition: background-color 0.2s, color 0.2s;
}

.outline-nav a:hover,
.outline-nav a:focus {
  background-color: var(--founders-rock);
  color: var(--white);
}