/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #0B0D1A;
  --bg-secondary: #111327;
  --bg-card: #161833;
  --bg-card-dark: #12142A;
  --bg-card-hover: #1C1F3D;
  --border-color: rgba(124, 58, 237, 0.15);
  --border-hover: rgba(124, 58, 237, 0.4);

  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;

  --accent-purple: #7C3AED;
  --accent-purple-light: #A78BFA;
  --accent-blue: #3B82F6;
  --accent-cyan: #06B6D4;
  --accent-pink: #EC4899;
  --accent-orange: #F59E0B;
  --accent-green: #10B981;

  --gradient-primary: linear-gradient(135deg, #7C3AED, #3B82F6);
  --gradient-hero: linear-gradient(135deg, #7C3AED 0%, #6366F1 50%, #3B82F6 100%);
  --gradient-text: linear-gradient(135deg, #A78BFA, #60A5FA);

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1200px;
}

/* ===== 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;
}

body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hide-mobile {
  display: inline;
}

/* ===== NAVIGATION ===== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: var(--transition);
  background: rgba(11, 13, 26, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(11, 13, 26, 0.95);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: white;
}

.logo-text {
  font-size: 1.15rem;
  letter-spacing: -0.5px;
}

.logo-highlight {
  color: var(--accent-purple-light);
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-cta {
  font-size: 0.85rem !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

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

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

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

.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 13, 26, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 40px 24px;
}

.mobile-menu-overlay.active {
  display: block;
}

.mobile-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-link {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-link:hover {
  color: var(--text-primary);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
}

.btn-outline:hover {
  border-color: var(--accent-purple-light);
  background: rgba(124, 58, 237, 0.08);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

/* ===== HERO SECTION ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.3;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  background: var(--accent-purple);
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.15;
}

.hero-glow-2 {
  width: 400px;
  height: 400px;
  background: var(--accent-blue);
  bottom: -100px;
  right: -100px;
  opacity: 0.1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(124, 58, 237, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--accent-purple-light);
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-badge i {
  font-size: 0.8rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -2px;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  margin-top: 60px;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  margin: 0 auto;
  position: relative;
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--accent-purple-light);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
  0% { opacity: 1; top: 6px; }
  50% { opacity: 0.5; top: 18px; }
  100% { opacity: 0; top: 18px; }
}

/* ===== SECTIONS ===== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.section-title.text-left {
  text-align: left;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ===== CARDS ===== */
.cards-grid {
  display: grid;
  gap: 24px;
}

.cards-3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards-3-2 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.card-dark {
  background: var(--bg-card-dark);
}

.card-hover:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.icon-blue {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

.icon-purple {
  background: rgba(124, 58, 237, 0.15);
  color: var(--accent-purple);
}

.icon-pink {
  background: rgba(236, 72, 153, 0.15);
  color: var(--accent-pink);
}

.icon-cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}

.icon-orange {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-orange);
}

.icon-green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== STATS SECTION ===== */
.stats-section {
  padding: 80px 0;
  border-top: 1px solid rgba(124, 58, 237, 0.08);
  border-bottom: 1px solid rgba(124, 58, 237, 0.08);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--text-primary);
  display: inline;
}

.stat-suffix {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--accent-purple-light);
  display: inline;
  margin-left: 2px;
}

.stat-item {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}

.stat-label {
  width: 100%;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== EDUCATION SECTION ===== */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

.edu-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.edu-featured {
  border-color: var(--accent-purple);
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.08) 0%, var(--bg-card) 100%);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.15);
}

.edu-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.edu-badge-premium {
  background: rgba(124, 58, 237, 0.2);
  color: var(--accent-purple-light);
}

.edu-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: white;
  margin-bottom: 20px;
}

.edu-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.edu-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.edu-features {
  list-style: none;
  margin-bottom: 24px;
}

.edu-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 6px 0;
}

.edu-features i {
  color: var(--accent-green);
  font-size: 0.8rem;
}

/* ===== ABOUT SECTION ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-top: 24px;
  margin-bottom: 28px;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 6px 16px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  color: var(--accent-purple-light);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-full);
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-card-stack {
  position: relative;
  width: 320px;
  height: 320px;
}

.about-center-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 50px rgba(124, 58, 237, 0.4);
}

.about-center-icon i {
  font-size: 2rem;
  margin-bottom: 6px;
}

.about-center-icon p {
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.about-float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow-card);
  animation: floatCard 6s ease-in-out infinite;
}

.about-float-card i {
  font-size: 1.1rem;
}

.about-float-card.card-1 {
  top: 10px;
  left: -10px;
  animation-delay: 0s;
}

.about-float-card.card-1 i { color: var(--accent-pink); }

.about-float-card.card-2 {
  top: 10px;
  right: -10px;
  animation-delay: 2s;
}

.about-float-card.card-2 i { color: var(--accent-blue); }

.about-float-card.card-3 {
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  animation-delay: 4s;
}

.about-float-card.card-3 i { color: var(--accent-green); }

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

.about-float-card.card-3 {
  animation-name: floatCard3;
}

@keyframes floatCard3 {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

/* ===== CTA & CONTACT SECTION ===== */
.cta-box {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 60px;
  text-align: center;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  position: relative;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  position: relative;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-input {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  border-color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.05);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(124, 58, 237, 0.08);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--accent-purple);
  color: white;
  transform: translateY(-2px);
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--accent-purple-light);
}

.footer-contact {
  list-style: none;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.footer-contact i {
  color: var(--accent-purple-light);
  width: 16px;
  text-align: center;
  font-size: 0.85rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-bottom-links a:hover {
  color: var(--accent-purple-light);
}

/* ===== ANIMATIONS ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 16px 28px;
  background: var(--bg-card);
  border: 1px solid var(--accent-green);
  border-radius: var(--radius-md);
  color: var(--accent-green);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 9999;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
  animation: toastIn 0.4s ease, toastOut 0.4s ease 2.6s forwards;
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .cards-3, .cards-3-2, .edu-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .section-title.text-left {
    text-align: center;
  }

  .about-tags {
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .hero-title {
    font-size: 2.5rem;
    letter-spacing: -1px;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hide-mobile {
    display: none;
  }

  .cards-3, .cards-3-2, .edu-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .section {
    padding: 70px 0;
  }

  .about-card-stack {
    width: 280px;
    height: 280px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}