/* ============================================
   MAYOOR MOHAN - ELEVATED DESIGN SYSTEM
   Contemporary Academic Portfolio
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Refined color palette */
  --color-cream: #FAF8F5;
  --color-cream-warm: #F5F2ED;
  --color-cream-dark: #EDE8E0;
  --color-accent: #8B5A2B;
  --color-accent-light: #B8956C;
  --color-accent-muted: rgba(139, 90, 43, 0.08);
  --color-dark: #1C1917;
  --color-text: #44403C;
  --color-text-light: #78716C;
  --color-text-muted: #A8A29E;
  --color-border: rgba(139, 90, 43, 0.12);
  
  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  
  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.4s;
  --duration-slow: 0.8s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--color-accent);
  color: var(--color-cream);
}

body {
  font-family: var(--font-body);
  background-color: var(--color-cream);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

/* Subtle noise texture overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.03;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ---------- Links & Buttons ---------- */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out-quart);
}

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

/* ---------- Scroll Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- Navigation ---------- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 24px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, var(--color-cream) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
  pointer-events: none;
}

nav.scrolled::before {
  opacity: 1;
}

nav.scrolled {
  padding: 16px 48px;
  background: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  text-decoration: none;
  position: relative;
  z-index: 1;
}

.nav-links {
  display: flex;
  gap: 48px;
  position: relative;
  z-index: 1;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-light);
  text-decoration: none;
  position: relative;
  padding: 4px 0;
  transition: color var(--duration-fast) var(--ease-out-quart);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-dark);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Mobile menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
  position: relative;
  z-index: 1;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 1.5px;
  background-color: var(--color-dark);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

/* ---------- Layout ---------- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-3xl) var(--space-xl);
  position: relative;
}

.section-alt {
  background-color: var(--color-cream-warm);
}

.section-dark {
  background-color: var(--color-dark);
  color: var(--color-cream);
}

/* ---------- Typography ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--color-accent);
}

.section-dark .eyebrow {
  color: var(--color-accent-light);
}

.section-dark .eyebrow::before {
  background: var(--color-accent-light);
}

.headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.headline em {
  font-style: italic;
}

.section-dark .headline {
  color: var(--color-cream);
}

.divider {
  width: 48px;
  height: 1px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  margin-bottom: var(--space-xl);
}

.body-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.body-text p {
  margin-bottom: var(--space-lg);
}

.body-text p:last-child {
  margin-bottom: 0;
}

.body-text strong {
  font-weight: 600;
  color: var(--color-dark);
}

.body-text em {
  color: var(--color-text-light);
}

/* ---------- Page Header ---------- */
.page-header {
  padding: 160px var(--space-xl) var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-muted) 0%, transparent 70%);
  pointer-events: none;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  position: relative;
}

.page-header h1 em {
  font-style: italic;
}

.page-header .subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-top: var(--space-md);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px var(--space-xl) var(--space-2xl);
  position: relative;
  overflow: hidden;
}

/* Decorative elements */
.hero-decoration {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero-decoration-1 {
  top: 10%;
  right: 5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-accent-muted) 0%, transparent 70%);
}

.hero-decoration-2 {
  bottom: 15%;
  left: 8%;
  width: 200px;
  height: 200px;
  border: 1px solid var(--color-border);
  opacity: 0.5;
}

.hero-decoration-3 {
  top: 30%;
  left: 15%;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  opacity: 0.3;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
  max-width: 1000px;
  width: 100%;
  position: relative;
}

.hero-content {
  position: relative;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.hero-eyebrow::before {
  content: '';
  width: 40px;
  height: 1px;
  background: var(--color-accent);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.hero-title em {
  font-style: italic;
  font-weight: 400;
}

.hero-subtitle {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  max-width: 480px;
}

.hero-text {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
  max-width: 520px;
}

.hero-image-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-frame {
  position: relative;
}

.hero-image-frame::before {
  content: '';
  position: absolute;
  top: -12px;
  right: -12px;
  width: 100%;
  height: 100%;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  opacity: 0.3;
}

.hero-image-frame::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: -20px;
  width: 80px;
  height: 80px;
  background: var(--color-accent-muted);
  border-radius: 50%;
  z-index: -1;
}

.hero-image {
  width: 280px;
  height: 280px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  filter: grayscale(10%);
  transition: filter var(--duration-normal) var(--ease-out-quart);
}

.hero-image:hover {
  filter: grayscale(0%);
}

/* ---------- Grid Layouts ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-2xl);
  align-items: start;
}

.grid-2-equal {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* ---------- Publications ---------- */
.publications-list {
  margin-top: var(--space-xl);
}

.publication-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.publication-item:hover {
  background: linear-gradient(to right, var(--color-accent-muted), transparent);
  margin-left: calc(var(--space-md) * -1);
  margin-right: calc(var(--space-md) * -1);
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.publication-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  padding-top: 4px;
}

.publication-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.45;
  margin-bottom: 6px;
  color: var(--color-dark);
  letter-spacing: -0.01em;
}

.publication-journal {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-style: italic;
}

.publication-authors {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.publication-note {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

.publication-doi {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  margin-top: 8px;
}

.publication-doi a {
  color: var(--color-text-muted);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.publication-doi a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- Awards ---------- */
.awards-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: var(--space-2xl);
  align-items: start;
}

.awards-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.award-item {
  padding: var(--space-md) var(--space-lg);
  border-left: 2px solid var(--color-accent-light);
  background: rgba(255, 255, 255, 0.03);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.award-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.award-year {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-accent-light);
  margin-bottom: 4px;
  letter-spacing: 0.1em;
}

.award-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--color-cream);
}

/* ---------- Textbook Feature ---------- */
.textbook-feature {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04),
              0 8px 24px rgba(0, 0, 0, 0.06);
  margin: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
}

.textbook-feature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-light));
}

.textbook-cover {
  width: 150px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.textbook-feature:hover .textbook-cover {
  transform: translateY(-4px) rotate(-1deg);
}

.textbook-info h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: var(--space-sm);
  color: var(--color-dark);
  letter-spacing: -0.01em;
}

.textbook-info p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.textbook-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap var(--duration-fast) var(--ease-out-quart);
}

.textbook-link:hover {
  gap: 12px;
}

/* ---------- List Sections ---------- */
.list-section {
  margin-top: var(--space-xl);
}

.list-section h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

.list-section ul {
  list-style: none;
  font-size: 0.95rem;
  line-height: 2.2;
  color: var(--color-text);
}

.list-section li strong {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-right: var(--space-sm);
}

/* Category headers */
.category-header {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  margin-top: var(--space-xl);
}

.category-header:first-child {
  margin-top: 0;
}

/* ---------- Consulting Grid ---------- */
.consulting-category h4 {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.consulting-category ul {
  list-style: none;
  font-size: 0.9rem;
  line-height: 2;
  color: var(--color-text);
}

/* ---------- Course Items ---------- */
.course-category {
  margin-bottom: var(--space-xl);
}

.course-category:last-child {
  margin-bottom: 0;
}

.course-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.course-item:last-child {
  border-bottom: none;
}

.course-name {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-dark);
}

.course-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  white-space: nowrap;
  margin-left: var(--space-md);
}

/* ---------- Leadership Items ---------- */
.leadership-item {
  margin-bottom: var(--space-xl);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border);
  transition: border-color var(--duration-fast) var(--ease-out-quart);
}

.leadership-item:hover {
  border-color: var(--color-accent);
}

.leadership-item:last-child {
  margin-bottom: 0;
}

.leadership-item h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
  color: var(--color-dark);
}

.leadership-item .dates {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.leadership-item .body-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* ---------- Centers & Labs ---------- */
.center-item {
  margin-bottom: var(--space-xl);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border);
  transition: border-color var(--duration-fast) var(--ease-out-quart);
}

.center-item:hover {
  border-color: var(--color-accent);
}

.center-item:last-child {
  margin-bottom: 0;
}

.center-item h4 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.center-item h4 a {
  color: var(--color-dark);
  transition: color var(--duration-fast) var(--ease-out-quart);
}

.center-item h4 a:hover {
  color: var(--color-accent);
}

.center-item .role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.center-item p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* ---------- Press Mentions ---------- */
.press-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.press-item:first-child {
  border-top: 1px solid var(--color-border);
}

.press-item:hover {
  padding-left: var(--space-md);
  background: linear-gradient(to right, var(--color-accent-muted), transparent);
  margin-left: calc(var(--space-md) * -1);
  margin-right: calc(var(--space-md) * -1);
  padding-right: var(--space-md);
}

.press-outlet {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.press-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.45;
  margin-bottom: 4px;
  color: var(--color-dark);
}

.press-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.contact-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.contact-title em {
  font-style: italic;
}

.contact-intro {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-light);
}

.contact-info {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--color-text);
}

.contact-group {
  margin-bottom: var(--space-xl);
}

.contact-group:last-child {
  margin-bottom: 0;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.contact-info a {
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-border);
  transition: border-color var(--duration-fast) var(--ease-out-quart);
}

.contact-info a:hover {
  border-color: var(--color-accent);
  color: var(--color-dark);
}

.profiles-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.profiles-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.profiles-links a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- Buttons & Links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-accent);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.btn span {
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.btn:hover {
  color: var(--color-dark);
  border-color: var(--color-dark);
}

.btn:hover span {
  transform: translateX(4px);
}

.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-cream);
  background-color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-accent);
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.btn-solid:hover {
  background-color: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-cream);
}

.btn-solid span {
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.btn-solid:hover span {
  transform: translateY(2px);
}

/* ---------- Footer ---------- */
footer {
  padding: var(--space-xl) var(--space-xl);
  background-color: var(--color-dark);
  color: var(--color-cream);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color var(--duration-fast) var(--ease-out-quart);
}

.footer-links a:hover {
  color: var(--color-cream);
}

/* ---------- Map ---------- */
.map-container {
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04),
              0 8px 24px rgba(0, 0, 0, 0.06);
}

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-xl);
  }
  
  .hero-image-container {
    order: -1;
  }
  
  .hero-eyebrow {
    justify-content: center;
  }
  
  .hero-eyebrow::before {
    display: none;
  }
  
  .hero-subtitle,
  .hero-text {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-image {
    width: 220px;
    height: 220px;
  }
  
  .textbook-feature {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .textbook-cover {
    margin: 0 auto;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 64px;
  }
  
  .hero,
  .section {
    padding: var(--space-2xl) var(--space-lg);
  }
  
  .page-header {
    padding: 120px var(--space-lg) var(--space-xl);
  }
  
  .grid-2,
  .awards-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .grid-2-equal,
  .awards-content {
    grid-template-columns: 1fr;
  }
  
  .eyebrow::before {
    width: 20px;
  }
  
  nav {
    padding: 16px var(--space-lg);
  }
  
  nav.scrolled {
    padding: 12px var(--space-lg);
  }
  
  .nav-links {
    gap: var(--space-lg);
  }
  
  .nav-links a {
    font-size: 0.7rem;
  }
  
  footer {
    padding: var(--space-lg);
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
  
  .footer-links {
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(250, 248, 245, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-lg);
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }
  
  .nav-links a {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  nav.menu-open .nav-links {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  /* Hamburger animation when open */
  nav.menu-open .mobile-menu-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  nav.menu-open .mobile-menu-toggle span:nth-child(2) {
    opacity: 0;
  }
  
  nav.menu-open .mobile-menu-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .publication-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
  
  .publication-year {
    font-size: 0.7rem;
  }
  
  .hero-image {
    width: 180px;
    height: 180px;
  }
}

/* ---------- Print Styles ---------- */
@media print {
  nav, footer, .hero-decoration {
    display: none;
  }
  
  body::before {
    display: none;
  }
  
  .section {
    padding: 20px 0;
  }
}