:root {
  --primary-color: #0E2A47;
  --bg-color: #F8F9FA;
  --secondary-bg: #E6E9ED;
  --text-secondary: #6B7280;
  --text-primary: #1F2933;
  --accent-green: #2FA66A;
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 80px;
  --bottom-nav-height: 0px;
  --safe-area-bottom: env(safe-area-inset-bottom);
  --safe-area-top: env(safe-area-inset-top);
  --safe-area-left: env(safe-area-inset-left);
  --safe-area-right: env(safe-area-inset-right);
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: rgba(47, 166, 106, 0.1);
  touch-action: manipulation;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
  height: 100%;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  min-height: 100vh;
  min-height: -webkit-fill-available;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1;
  font-kerning: normal;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary-color);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 8vw, 3.5rem);
  hyphens: auto;
  font-weight: 800;
  letter-spacing: -0.03em;
}

h1.no-underline::after,
h2.no-underline::after,
.no-underline::after {
  display: none !important;
}

h2 {
  font-size: clamp(1.5rem, 6vw, 2.5rem);
  position: relative;
  display: block;
  margin-bottom: var(--spacing-xl);
  font-weight: 700;
}

h2:not(.no-underline)::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 48px;
  height: 4px;
  background: var(--accent-green);
  border-radius: 2px;
}

h3 {
  font-size: clamp(1.2rem, 4vw, 1.4rem);
  letter-spacing: -0.01em;
  font-weight: 600;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition-fast);
  -webkit-touch-callout: default;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  padding-left: max(var(--spacing-lg), var(--safe-area-left));
  padding-right: max(var(--spacing-lg), var(--safe-area-right));
}

section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.cta-button {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 2rem;
  border: none;
  cursor: pointer;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  border-radius: 8px;
  min-height: 48px;
  position: relative;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

.cta-button:hover {
  background-color: var(--text-primary);
  color: white;
  transform: translateY(-1px);
}

.cta-button:active {
  transform: translateY(0);
}

input, textarea {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--secondary-bg);
  background: white;
  font-family: inherit;
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-fast);
  border-radius: 12px;
  font-size: 16px;
  -webkit-appearance: none;
  appearance: none;
  min-height: 48px;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(47, 166, 106, 0.1);
}

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

.card {
  background: white;
  padding: var(--spacing-xl);
  border: 1px solid var(--secondary-bg);
  transition: all var(--transition-smooth);
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.img-placeholder {
  background: #e2e8f0;
  width: 100%;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 2rem;
  border: 1px solid var(--secondary-bg);
  border-radius: 8px;
  content-visibility: auto;
  padding: var(--spacing-md);
  text-align: center;
  word-break: break-word;
  overflow: hidden;
}

.nav-link {
  position: relative;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.nav-link:hover {
  color: var(--accent-green);
}

.badge {
  display: block;
  color: var(--accent-green);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 250, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--secondary-bg);
  padding-top: var(--safe-area-top);
}

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

.mobile-nav {
  display: none;
}

.scroll-top-btn {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom) + 20px);
  right: 20px;
  width: 56px;
  height: 56px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  box-shadow: 0 8px 24px rgba(14, 42, 71, 0.2);
  transition: all var(--transition-smooth);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  transform: translateY(-4px);
  background: var(--accent-green);
  box-shadow: 0 12px 32px rgba(47, 166, 106, 0.3);
}

.scroll-top-btn:active {
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .scroll-top-btn {
    bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom) + 16px);
    right: 16px;
    width: 48px;
    height: 48px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --bottom-nav-height: 72px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
  }

  section {
    padding: clamp(2.5rem, 6vw, 3.5rem) 0;
  }
  
  .grid {
    gap: var(--spacing-lg);
  }
  
  .container {
    padding: 0 var(--spacing-md);
    padding-left: max(var(--spacing-md), var(--safe-area-left));
    padding-right: max(var(--spacing-md), var(--safe-area-right));
  }
  
  header .container {
    padding: 0 var(--spacing-md);
    justify-content: center;
  }

  header nav {
    display: none !important;
  }

  header img {
    height: 52px !important;
  }
  
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 0.5px solid rgba(0, 0, 0, 0.08);
    justify-content: space-around;
    align-items: flex-start;
    z-index: 1000;
    padding-top: 8px;
    padding-bottom: max(8px, var(--safe-area-bottom));
    box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.04);
  }

  .mobile-nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    color: #9ca3af;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex: 1;
    padding: 8px 4px;
    min-width: 64px;
    min-height: 56px;
    transition: all var(--transition-fast);
    position: relative;
  }

  .mobile-nav-link svg {
    transition: all var(--transition-fast);
  }

  .mobile-nav-link.active {
    color: var(--primary-color);
  }

  .mobile-nav-link.active svg {
    color: var(--accent-green);
    transform: scale(1.1);
  }

  .mobile-nav-link:active {
    transform: scale(0.95);
  }

  main {
    padding-bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
  }

  .cta-button {
    width: 100%;
    padding: 1.125rem 1.5rem;
    font-size: 0.875rem;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(14, 42, 71, 0.12);
    font-weight: 700;
    letter-spacing: 0.08em;
  }

  .cta-button:active {
    transform: scale(0.97);
  }

  .hero {
    padding: 0 !important;
    min-height: auto !important;
    display: block !important;
  }

  .hero-bg {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
  }

  .hero-content {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: left !important;
    order: 2;
  }

  .hero-content h1 {
    font-size: clamp(1.875rem, 9vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    text-align: left !important;
  }

  .hero-content p {
    font-size: 1.0625rem !important;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    color: #4b5563;
    text-align: left !important;
    max-width: none !important;
  }

  .hero-actions {
    justify-content: flex-start !important;
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md) !important;
    align-items: flex-start !important;
  }

  .hero-actions .secondary-link {
    padding: var(--spacing-md);
    width: 100%;
    justify-content: center;
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  .hero-img {
    display: block !important;
    width: 100vw !important;
    margin-left: calc(-1 * var(--spacing-md)) !important;
    margin-right: calc(-1 * var(--spacing-md)) !important;
    border-radius: 0 !important;
    order: 1;
    height: 50vh !important;
    max-height: 400px !important;
  }

  .section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl) !important;
    padding: 0 var(--spacing-sm);
  }

  .section-header h2 {
    margin-bottom: var(--spacing-lg);
  }

  .section-header p {
    font-size: 1.0625rem;
    line-height: 1.65;
    margin: 0 auto;
  }

  .section-header h2::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .portfolio-grid {
    grid-template-columns: 1fr !important;
  }

  .portfolio-card {
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
  }

  .split-grid {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
  }

  .split-img {
    width: 100vw !important;
    margin-left: calc(-1 * var(--spacing-md)) !important;
    margin-right: calc(-1 * var(--spacing-md)) !important;
    height: 50vh !important;
    max-height: 350px !important;
    border-radius: 0 !important;
    order: 1;
  }

  .split-content {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    order: 2;
  }

  .split-content h2 {
    font-size: clamp(1.5rem, 7vw, 1.875rem);
  }

  .split-content p {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.65;
  }

  .target-grid {
    grid-template-columns: 1fr !important;
    text-align: left;
    max-width: 100%;
    margin: 0;
    gap: var(--spacing-sm) !important;
  }

  .target-item {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid rgba(47, 166, 106, 0.15);
    border-left: 3px solid var(--accent-green);
    border-radius: 12px;
    width: 100%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    transition: all var(--transition-smooth);
  }

  .target-item:active {
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(47, 166, 106, 0.15);
    border-left-width: 4px;
  }

  .spec-grid {
    grid-template-columns: 1fr !important;
  }

  .spec-card {
    padding: var(--spacing-2xl) var(--spacing-lg) !important;
    text-align: center;
    border-radius: 20px;
    background: rgba(255,255,255,0.04) !important;
    border: 1px solid rgba(255,255,255,0.1) !important;
  }

  .principles-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-lg) !important;
  }

  .principle-item {
    text-align: left;
    border-left: 4px solid var(--accent-green) !important;
    border-top: none !important;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-lg) var(--spacing-lg) !important;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    transition: all var(--transition-smooth);
  }

  .principle-item:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  }

  .cta-section {
    padding: var(--spacing-3xl) 0 !important;
  }

  .cta-section h2 {
    font-size: clamp(1.5rem, 8vw, 2rem) !important;
    line-height: 1.2;
  }

  .cta-section p {
    font-size: 1.0625rem !important;
    line-height: 1.65;
  }

  footer {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-xs) 0 !important;
    margin-top: var(--spacing-lg) !important;
  }

  footer .grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-md) !important;
    margin-bottom: var(--spacing-sm) !important;
  }

  footer .grid div {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  footer .grid div h4 {
    font-size: 0.875rem !important;
    margin-bottom: 0.5rem !important;
  }

  footer .grid div nav {
    gap: 0.375rem !important;
  }

  footer .grid div nav a {
    font-size: 0.8125rem !important;
  }

  footer .grid div img {
    height: 56px !important;
    margin-bottom: var(--spacing-sm) !important;
  }

  footer .grid div p {
    font-size: 0.8125rem !important;
  }

  footer .container > div:last-child {
    flex-direction: column;
    gap: 0.375rem;
    text-align: center;
    padding-top: var(--spacing-sm) !important;
    font-size: 0.75rem !important;
  }

  .card {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: 18px;
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  }

  .portfolio-card {
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
  }

  .about-hero-grid {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
    text-align: center;
  }

  .about-hero-grid > div:first-child {
    order: 2;
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .about-hero-grid h1 {
    font-size: clamp(2rem, 9vw, 2.5rem);
  }

  .about-hero-grid p {
    font-size: 1.0625rem;
    line-height: 1.65;
  }

  .about-hero-img {
    width: 100vw !important;
    margin-left: calc(-1 * var(--spacing-md)) !important;
    margin-right: calc(-1 * var(--spacing-md)) !important;
    height: 50vh !important;
    max-height: 400px !important;
    border-radius: 0 !important;
    order: 1;
  }

  .team-grid {
    grid-template-columns: 1fr !important;
  }

  .team-card-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-md) !important;
  }

  .manifest-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-lg) !important;
  }

  .manifest-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: white;
    border-radius: 20px;
    border: 1px solid rgba(0,0,0,0.04);
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  }

  .contact-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-2xl) !important;
  }

  .contact-form-grid {
    grid-template-columns: 1fr !important;
  }

  .contact-info-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: white;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: 20px;
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 4px 16px rgba(0,0,0,0.03);
    transition: all var(--transition-fast);
  }

  .contact-info-item:active {
    transform: scale(0.98);
  }

  .badge {
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    font-weight: 700;
  }

  h3 {
    font-size: clamp(1.125rem, 4vw, 1.25rem);
  }

  .legal-content {
    padding: var(--spacing-lg);
    background: white;
    border-radius: 20px;
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 4px 16px rgba(0,0,0,0.03);
  }

  .legal-content h2 {
    font-size: clamp(1.25rem, 5vw, 1.5rem);
    margin-top: var(--spacing-xl);
  }

  .legal-content p {
    font-size: 1rem;
    line-height: 1.75;
  }

  .legal-content ul, .legal-content ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
  }

  .legal-content li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.75;
  }
}