/* ============================================
   UNIVERSIDAD POLITÉCNICA DIGITAL
   Design System & Landing Page Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Brand Colors */
  --upd-blue: #2B5EA7;
  --upd-blue-dark: #1A3A6C;
  --upd-blue-deeper: #0F2447;
  --upd-blue-light: #4A7EC7;
  --upd-blue-pale: #E8F0FA;
  --upd-gold: #C9A84C;
  --upd-gold-light: #E0CB7E;
  --upd-gold-dark: #9A7E2E;
  
  /* Neutrals */
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  
  /* Semantic */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --shadow-glow: 0 0 30px rgba(43, 94, 167, 0.3);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol { list-style: none; }

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

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

.section-title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--upd-blue-dark);
  text-align: center;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-500);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--upd-blue), var(--upd-blue-dark));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(43, 94, 167, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(43, 94, 167, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.6);
  backdrop-filter: blur(4px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--white);
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--upd-gold), var(--upd-gold-dark));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(201, 168, 76, 0.4);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201, 168, 76, 0.5);
}

/* ── Animate on scroll ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(15, 36, 71, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.15);
  padding: var(--space-sm) 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-icon {
  width: 50px;
  height: 50px;
  transition: transform var(--transition-base);
}

.logo:hover .logo-icon {
  transform: scale(1.05);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}

.logo-motto {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--upd-gold);
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--upd-gold);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--white);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--upd-gold), var(--upd-gold-dark)) !important;
  color: var(--white) !important;
  padding: 0.6rem 1.4rem !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(201, 168, 76, 0.4);
}

/* Mobile Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: var(--space-sm);
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

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

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

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--upd-blue-deeper) 0%, var(--upd-blue-dark) 40%, var(--upd-blue) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(201, 168, 76, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(74, 126, 199, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255,255,255,0.03) 0%, transparent 70%);
  z-index: 1;
}

/* Animated particles */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(201, 168, 76, 0.4);
  border-radius: 50%;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 850px;
  margin: 0 auto;
  padding: var(--space-4xl) var(--space-xl);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(201, 168, 76, 0.15);
  border: 1px solid rgba(201, 168, 76, 0.3);
  color: var(--upd-gold-light);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-xl);
  backdrop-filter: blur(10px);
  animation: fadeInDown 0.8s ease 0.2s both;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--upd-gold-light), var(--upd-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-description {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s ease infinite;
}

.hero-scroll svg {
  width: 28px;
  height: 28px;
  color: rgba(255,255,255,0.5);
}

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

/* Geometric decorations */
.hero-decoration {
  position: absolute;
  z-index: 1;
  opacity: 0.08;
}

.hero-decoration-1 {
  top: 10%;
  right: 5%;
  width: 300px;
  height: 300px;
  border: 2px solid var(--upd-gold);
  border-radius: 50%;
  animation: spin-slow 30s linear infinite;
}

.hero-decoration-2 {
  bottom: 15%;
  left: 3%;
  width: 200px;
  height: 200px;
  border: 2px solid var(--white);
  transform: rotate(45deg);
  animation: spin-slow 25s linear infinite reverse;
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ============================================
   PROGRAMS SECTION
   ============================================ */
.programs {
  padding: var(--space-4xl) 0;
  background: var(--gray-50);
  position: relative;
}

.programs::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--upd-blue), var(--upd-gold), var(--upd-blue));
}

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

.program-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--gray-200);
  cursor: pointer;
}

.program-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--upd-blue), var(--upd-blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.program-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.program-card:hover::before {
  transform: scaleX(1);
}

.program-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--space-lg);
  background: var(--upd-blue-pale);
  transition: all var(--transition-base);
}

.program-card:hover .program-icon {
  background: linear-gradient(135deg, var(--upd-blue), var(--upd-blue-dark));
  transform: scale(1.1);
}

.program-card:hover .program-icon span {
  filter: brightness(10);
}

.program-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: var(--space-sm);
}

.program-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.program-tag {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--upd-blue-pale);
  color: var(--upd-blue);
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--upd-blue-deeper) 0%, var(--upd-blue-dark) 100%);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.1), transparent 70%);
  border-radius: 50%;
}

.stats .section-title {
  color: var(--white);
}

.stats .section-subtitle {
  color: rgba(255,255,255,0.6);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.stat-item {
  text-align: center;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.stat-item:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-5px);
  border-color: rgba(201, 168, 76, 0.3);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--upd-gold-light);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  font-weight: 500;
}

/* ============================================
   ABOUT / WHY SECTION
   ============================================ */
.why-section {
  padding: var(--space-4xl) 0;
  background: var(--white);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.why-content h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--upd-blue-dark);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

.why-content p {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.why-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.why-feature {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.why-feature-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  background: var(--upd-blue-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.why-feature-text h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 0.2rem;
}

.why-feature-text p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 0;
}

.why-visual {
  position: relative;
}

.why-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.why-image-wrapper img {
  width: 100%;
  height: 450px;
  object-fit: cover;
}

.why-floating-card {
  position: absolute;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.why-floating-card.card-1 {
  bottom: -20px;
  left: -20px;
}

.why-floating-card.card-2 {
  top: -20px;
  right: -20px;
}

.why-floating-card .card-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.card-1 .card-icon {
  background: rgba(16, 185, 129, 0.15);
}

.card-2 .card-icon {
  background: rgba(201, 168, 76, 0.15);
}

.why-floating-card .card-info strong {
  display: block;
  font-size: 1.1rem;
  color: var(--gray-800);
}

.why-floating-card .card-info span {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */
.testimonials {
  padding: var(--space-4xl) 0;
  background: var(--gray-50);
}

.testimonials-carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonial-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.testimonial-slide {
  min-width: 100%;
  padding: 0 var(--space-xl);
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-3xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 20px;
  left: 30px;
  font-family: var(--font-serif);
  font-size: 5rem;
  color: var(--upd-blue-pale);
  line-height: 1;
}

.testimonial-card p {
  font-size: 1.1rem;
  color: var(--gray-600);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: var(--space-xl);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--upd-blue), var(--upd-blue-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
}

.testimonial-info strong {
  display: block;
  font-size: 0.95rem;
  color: var(--gray-800);
}

.testimonial-info span {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  color: var(--gray-600);
}

.carousel-btn:hover {
  background: var(--upd-blue);
  color: var(--white);
  border-color: var(--upd-blue);
}

.carousel-dots {
  display: flex;
  gap: var(--space-sm);
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-300);
  border: none;
  transition: all var(--transition-base);
  padding: 0;
}

.carousel-dot.active {
  background: var(--upd-blue);
  width: 28px;
  border-radius: 5px;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--upd-blue-dark) 0%, var(--upd-blue) 50%, var(--upd-blue-dark) 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.08), transparent 60%);
  border-radius: 50%;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  color: var(--white);
  margin-bottom: var(--space-md);
}

.cta-content p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  max-width: 550px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand .logo-name {
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
}

.footer-brand .logo-motto {
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray-500);
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: var(--gray-500);
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--upd-gold);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  color: var(--gray-400);
}

.social-icon:hover {
  background: var(--upd-blue);
  border-color: var(--upd-blue);
  color: var(--white);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

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

.footer-bottom-links a:hover {
  color: var(--upd-gold);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .hero-title { font-size: 3rem; }
  .programs-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: var(--upd-blue-deeper);
    flex-direction: column;
    padding: 5rem var(--space-2xl) var(--space-2xl);
    gap: var(--space-lg);
    transition: right var(--transition-base);
    box-shadow: -10px 0 40px rgba(0,0,0,0.3);
  }

  .nav-links.active {
    right: 0;
  }

  .hero-title { font-size: 2.25rem; }
  .hero-description { font-size: 1rem; }
  .section-title { font-size: 2rem; }
  .programs-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-number { font-size: 2.25rem; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .hero-title { font-size: 1.85rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .cta-content h2 { font-size: 2rem; }
}