/* ============================================
   mjbooth.com - Professional Portfolio Styles
   University of Michigan Color Palette
   ============================================ */

/* CSS Custom Properties (Variables) */
:root {
  /* Michigan Colors */
  --blue-dark: #00274C;
  --blue-medium: #003A70;
  --blue-light: #004B8D;
  --maize: #E1B74A;
  --white: #FFFFFF;
  --gray-dark: #1F2933;
  --gray-medium: #52606D;
  --gray-light: #F5F7FA;

  /* Typography */
  --font-primary: "IBM Plex Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 39, 76, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 39, 76, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 39, 76, 0.2);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.6;
  color: var(--gray-dark);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--blue-dark);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

p {
  margin-bottom: var(--space-sm);
}

a {
  color: var(--blue-medium);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--maize);
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
}

.section-alt {
  background-color: var(--gray-light);
}

.text-center { text-align: center; }
.text-maize { color: var(--maize); }

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-medium);
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  transition: height var(--transition-medium);
}

.nav.scrolled .nav-inner {
  height: 60px;
}

.nav-logo {
  height: 40px;
  width: auto;
  transition: transform var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.02);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-link {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--gray-dark);
  padding: var(--space-xs) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--maize);
  transition: width var(--transition-medium);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--blue-dark);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--blue-dark);
  transition: all var(--transition-fast);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--blue-dark);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--blue-medium);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--blue-dark);
  border: 2px solid var(--blue-dark);
}

.btn-secondary:hover {
  background: var(--blue-dark);
  color: var(--white);
}

.btn-maize {
  background: var(--maize);
  color: var(--blue-dark);
}

.btn-maize:hover {
  background: #c9a142;
  color: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-icon {
  width: 18px;
  height: 18px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-medium) 50%, var(--blue-light) 100%);
  overflow: hidden;
}

/* Subtle animated background pattern */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(225, 183, 74, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  animation: heroShift 20s ease-in-out infinite alternate;
}

@keyframes heroShift {
  0% { opacity: 0.5; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-lg);
  max-width: 800px;
}

.hero-logo {
  width: min(350px, 80vw);
  height: auto;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--space-sm);
  font-size: clamp(2.5rem, 6vw, 4rem);
}

.hero-tagline {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: var(--space-lg);
  font-weight: 300;
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  color: var(--white);
  opacity: 0.7;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  margin-bottom: var(--space-xs);
}

.section-header p {
  color: var(--gray-medium);
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px;
  height: 3px;
  background: var(--maize);
  margin: var(--space-sm) auto 0;
}

/* ============================================
   About Section
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .about-content {
    grid-template-columns: 2fr 1fr;
  }
}

.about-text p {
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-image {
  text-align: center;
}

.about-image img {
  width: 100%;
  max-width: 280px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

/* Centered intro card */
.about-intro-card {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-lg);
}

.about-intro-card img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  object-position: center 45%;
  border-radius: 50%;
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-lg);
}

.about-intro-card p {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--gray-dark);
}

/* Full-width content sections */
.about-section-block {
  max-width: 800px;
  margin: 0 auto var(--space-lg);
}

.about-section-block h3 {
  text-align: center;
  color: var(--maize);
  margin-bottom: var(--space-sm);
}

.about-section-block p {
  font-size: 1.05rem;
  line-height: 1.8;
  text-align: center;
}

.about-section-block ul {
  margin-left: 1.5rem;
  margin-bottom: var(--space-md);
}

.about-section-block li {
  margin-bottom: var(--space-xs);
  line-height: 1.7;
}

/* Expertise badges */
.expertise-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: var(--gray-light);
  color: var(--blue-dark);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 20px;
  border: 1px solid rgba(0, 39, 76, 0.1);
}

/* ============================================
   Expertise Cards
   ============================================ */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.expertise-card {
  background: var(--white);
  padding: var(--space-md);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 39, 76, 0.05);
  transition: all var(--transition-medium);
}

.expertise-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--maize);
}

.expertise-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-medium));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.expertise-icon svg {
  width: 24px;
  height: 24px;
  color: var(--white);
}

.expertise-card h3 {
  margin-bottom: var(--space-xs);
}

.expertise-card p {
  color: var(--gray-medium);
  font-size: 0.95rem;
}

/* ============================================
   Publications / Accordion
   ============================================ */
.publications-list {
  max-width: 800px;
  margin: 0 auto;
}

.publication-item {
  background: var(--white);
  border-radius: 8px;
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.publication-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.publication-header:hover {
  background: var(--gray-light);
}

.publication-title {
  font-weight: 600;
  color: var(--blue-dark);
  font-size: 0.95rem;
}

.publication-year {
  color: var(--gray-medium);
  font-size: 0.85rem;
  margin-left: var(--space-sm);
  flex-shrink: 0;
}

.publication-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-medium);
  transition: transform var(--transition-fast);
}

.publication-item.open .publication-toggle {
  transform: rotate(180deg);
}

.publication-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-medium);
}

.publication-item.open .publication-content {
  max-height: 500px;
}

.publication-details {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--gray-medium);
  font-size: 0.9rem;
  line-height: 1.7;
  border-top: 1px solid var(--gray-light);
}

.publication-details a {
  color: var(--blue-medium);
  text-decoration: underline;
}

/* ============================================
   Athletics Section
   ============================================ */
.athletics-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.athletics-card {
  background: var(--white);
  padding: var(--space-md);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-medium);
}

.athletics-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.athletics-stat {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--maize);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.athletics-label {
  font-size: 0.9rem;
  color: var(--gray-medium);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.contact-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.contact-email {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--blue-dark);
  margin-top: var(--space-md);
}

.contact-email a {
  color: var(--blue-medium);
  border-bottom: 2px solid var(--maize);
  padding-bottom: 2px;
}

.contact-email a:hover {
  color: var(--maize);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--blue-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-md) 0;
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  margin: 0;
}

.footer a {
  color: var(--maize);
}

/* ============================================
   Mobile Responsive
   ============================================ */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .section {
    padding: var(--space-lg) 0;
  }
}

/* ============================================
   AOS Animation Overrides
   ============================================ */
[data-aos] {
  pointer-events: none;
}

[data-aos].aos-animate {
  pointer-events: auto;
}

/* Print Styles */
@media print {
  .nav, .hero, .scroll-indicator, .btn {
    display: none;
  }

  .section {
    padding: var(--space-md) 0;
  }
}