/* Ribbon Navigation */
@import url('https://fonts.googleapis.com/css2?family=Roboto+Condensed:wght@400;600;700&display=swap');

.ribbon-nav {
  position: relative;
  background: #5a0000; /* Darker maroon background */
  padding: 12px 0 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  overflow: hidden;
  font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
  font-weight: 600;
  --gold: #FFC107; /* Golden yellow */
}

.ribbon-doodles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.12;
  background-image: 
    url("data:image/svg+xml,%3Csvg width='150' height='150' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30,30 L70,30 L70,70 L30,70 Z' fill='none' stroke='%23FFC107' stroke-width='0.8'/%3E%3Cpath d='M20,50 L80,50' stroke='%23FFC107' stroke-width='0.6'/%3E%3Cpath d='M50,20 L50,80' stroke='%23FFC107' stroke-width='0.6'/%3E%3Cpath d='M30,30 L70,70' stroke='%23FFC107' stroke-width='0.8'/%3E%3Cpath d='M70,30 L30,70' stroke='%23FFC107' stroke-width='0.8'/%3E%3Ccircle cx='50' cy='50' r='15' fill='none' stroke='%23FFC107' stroke-width='0.6'/%3E%3Ctext x='10' y='20' font-size='10' fill='%23FFC107' opacity='0.6'%3Eπ%3C/text%3E%3Ctext x='80' y='30' font-size='12' fill='%23FFC107' opacity='0.6'%3EΣ%3C/text%3E%3Ctext x='20' y='80' font-size='8' fill='%23FFC107' opacity='0.5'%3E∫%3C/text%3E%3Ctext x='85' y='85' font-size='14' fill='%23FFC107' opacity='0.4'%3E∞%3C/text%3E%3Ctext x='50' y='50' font-size='16' fill='%23FFC107' opacity='0.3'%3E+%3C/text%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10,10 L90,10 L90,90 L10,90 Z' fill='none' stroke='%23FFC107' stroke-width='0.5' opacity='0.3'/%3E%3Ccircle cx='20' cy='20' r='3' fill='%23FFC107' opacity='0.4'/%3E%3Ccircle cx='80' cy='20' r='3' fill='%23FFC107' opacity='0.4'/%3E%3Ccircle cx='50' cy='50' r='3' fill='%23FFC107' opacity='0.4'/%3E%3Cpath d='M30,70 L70,30' stroke='%23FFC107' stroke-width='0.8' opacity='0.3'/%3E%3Ctext x='15' y='45' font-size='10' fill='%23FFC107' opacity='0.4'%3Eα%3C/text%3E%3Ctext x='80' y='60' font-size='12' fill='%23FFC107' opacity='0.4'%3Eβ%3C/text%3E%3Ctext x='40' y='30' font-size='8' fill='%23FFC107' opacity='0.4'%3Eγ%3C/text%3E%3C/svg%3E");
  background-size: 200px 200px, 300px 300px;
  background-blend-mode: overlay;
  pointer-events: none;
}

.ribbon-inner {
  position: relative;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

.ribbon-menu {
  display: flex;
  justify-content: flex-start;
  list-style: none;
  margin: 0;
  padding: 0 20px;
  flex-wrap: wrap;
}

.ribbon-menu li {
  margin: 0 10px;
  position: relative;
}

.ribbon-menu a {
  color: #fff;
  text-decoration: none;
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  font-weight: 500;
  padding: 10px 5px;
  display: block;
  position: relative;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ribbon-menu a:hover,
.ribbon-menu a.active {
  color: var(--gold);
}

.ribbon-menu a:after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background: #FFD700;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.ribbon-menu a:hover:after,
.ribbon-menu a.active:after {
  width: 80%;
}

.ribbon-line {
  position: relative;
  height: 4px;
  margin-top: 12px;
}

.ribbon-line .line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gold);
}

/* Vignette effect */
.ribbon-vignette {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, transparent 0%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.ribbon-nav:hover .ribbon-vignette {
  opacity: 0.3;
}

.ribbon-line .line-1 {
  top: 0;
  opacity: 0.8;
}

.ribbon-line .line-2 {
  top: 3px;
  opacity: 0.5;
}

/* Mobile menu toggle */
.ribbon-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  padding: 10px;
  position: absolute;
  right: 15px;
  top: 10px;
  z-index: 1001;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .ribbon-menu {
    display: none;
    flex-direction: column;
    padding: 10px 0;
  }
  
  .ribbon-nav.menu-open .ribbon-menu {
    display: flex;
  }
  
  .ribbon-menu li {
    margin: 5px 0;
    text-align: center;
  }
  
  .ribbon-mobile-toggle {
    display: block;
  }
  
  .ribbon-menu a {
    padding: 8px 0;
    font-size: 16px;
  }
}

/* Body styles */
body {
  font-family: 'Montserrat', sans-serif;
  /* warm paper-like background inspired by inspo.html */
  background: radial-gradient(circle at top left, #fffef9 0, #fffdf5 42%, #fffaf0 100%);
  color: #222;
  line-height: 1.7;
  padding-top: 0; /* Remove any default padding that might interfere with fixed header */
}

/* Layout */
.container {
  margin-top: 32px;
}

.main-content {
  background: #fffef9;
  padding: 24px 28px;
  border-radius: 10px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(139, 0, 0, 0.08);
  transition: box-shadow 0.18s ease, transform 0.15s ease;
}

.main-content:hover {
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
}

.sidebar {
  background: #fffef9;
  padding: 18px 20px;
  border-radius: 8px;
  border: 1px solid rgba(139, 0, 0, 0.06);
}

/* Photo/card */
.bordered-photo {
  margin-bottom: 24px;
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.10);
  border: 1px solid rgba(139, 0, 0, 0.08);
}

.bordered-photo img,
.img-responsive {
  width: 100% !important;
  height: auto !important;
  display: block;
}

/* Teaching page enhancements */
.teaching-section-heading {
  margin-top: 12px;
  margin-bottom: 8px;
}

.course-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-left: 6px;
}

.course-badge-current {
  background: linear-gradient(135deg, #8b0000, darkgoldenrod);
  color: #fffdf8;
}

.course-badge-past {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
}

.course-badge-ta {
  background: #e0f2fe;
  color: #1d4ed8;
  border: 1px solid #93c5fd;
}

.collapse-toggle {
  display: inline-block;
  margin: 0;
  cursor: pointer;
  color: #8b0000;
  text-decoration: none;
}

.collapse-toggle:hover,
.collapse-toggle:focus {
  color: darkgoldenrod;
  text-decoration: none;
}

/* Card-like wrappers for dropdown sections on teaching page */
.collapse-card {
  background: #fffef9;
  border-radius: 10px;
  border: 1px solid rgba(139, 0, 0, 0.08);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  margin-top: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.collapse-card:hover {
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.collapse-card-header {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(90deg, #fdf7ec, #fffef9);
  border-bottom: 1px solid rgba(139, 0, 0, 0.06);
}

.collapse-card-title {
  display: flex;
  align-items: center;
  gap: 6px;
}

.collapse-icon {
  font-size: 11px;
  margin-left: 8px;
  transition: transform 0.18s ease;
}

/* Bootstrap adds .collapsed on the toggle when the target is closed */
.collapse-toggle.collapsed .collapse-icon {
  transform: rotate(0deg);
}

.collapse-toggle .collapse-icon {
  transform: rotate(180deg);
}

.collapse-card-body {
  padding: 8px 16px 12px 16px;
}

.name-address {
  text-align: center;
  color: #8b0000;
  font-size: 18px;
  margin-top: 12px;
}

/* Typography */
h1,
.h1,
h2,
.h2,
h3,
.h3 {
  color: #1b1b1f;
  font-weight: 600;
}

h2.work-description {
  color: #8b0000;
  margin-top: 0;
  margin-bottom: 16px;
}

p {
  margin-bottom: 10px;
}

.work-description,
.publications-list,
.main-content,
.container,
.sidebar {
  font-size: 17px;
}

.publications-list ul,
.main-content ul,
.container ul {
  padding-left: 22px;
}

.publications-list li,
.main-content li {
  margin-bottom: 6px;
}

.publications-list a {
  color: #8b0000;
}

.publications-list a:hover,
.publications-list a:focus {
  color: darkgoldenrod;
  text-decoration: underline;
}

.warning-message {
  font-style: italic;
  margin-top: 16px;
  color: #555;
}

/* Navbar + ribbon */
nav.navbar {
  background: linear-gradient(90deg, #4b0000, #8b0000);
  border: none;
  height: 70px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35);
}

.navbar-nav > li > a {
  color: #fffdf8 !important;
  font-weight: 500;
  font-size: 15px;
  padding: 22px 20px;
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
}

.navbar-nav > li > a:hover,
.navbar-nav > li > a:focus {
  background-color: rgba(255, 255, 255, 0.06);
  color: #fffaf0 !important;
  box-shadow: inset 0 -3px 0 #ffd966;
}

.navbar-nav > .active > a,
.navbar-nav > .active > a:focus,
.navbar-nav > .active > a:hover {
  background-color: rgba(255, 255, 255, 0.10) !important;
  color: #ffffff !important;
  box-shadow: inset 0 -3px 0 #ffd966;
}

.ribbon {
  background: linear-gradient(90deg, goldenrod, darkgoldenrod);
  height: 6px;
  width: 100%;
}

/* Buttons / links */
.btn-primary {
  background: linear-gradient(135deg, #8b0000, darkgoldenrod);
  border-color: #8b0000;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease;
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(135deg, #a00000, #e0b13b);
  border-color: #5f0000;
  box-shadow: 0 10px 24px rgba(139, 0, 0, 0.4);
  transform: translateY(-1px);
}

/* Notes button that uses Caveat */
.notes-cta {
  font-family: 'Caveat', cursive;
  margin: 20px 0;
  padding: 15px 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, #8b0000, darkgoldenrod);
  border-color: #8b0000;
  font-size: 22px;
}

/* Small utility for centered page titles */
.page-title {
  text-align: center;
  margin-bottom: 24px;
}

/* Subtle global link styling */
a {
  color: #8b0000;
}

a:hover,
a:focus {
  color: darkgoldenrod;
}