:root {
  /* Sophisticated Modern Palette */
  --color-bg-base: #010103;

  /* Unified Deep Gradient Background - Enhanced depth */
  --gradient-body: radial-gradient(
    ellipse at top,
    #0a1628 0%,
    #020408 50%,
    #000000 100%
  );

  /* Text - Enhanced contrast */
  --color-text-primary: #ffffff;
  --color-text-secondary: #c5cad5;
  --color-text-muted: #7a8394;

  /* Accents - Scientific Blue/Cyan with refined tones */
  --color-accent-primary: #0a84ff; /* Refined Tech Blue */
  --color-accent-secondary: #00e5ff; /* Enhanced Cyan Glow */
  --color-accent-tertiary: #5e5ce6; /* Deep Purple accent */
  --color-border-subtle: rgba(255, 255, 255, 0.06);
  --color-border-glow: rgba(10, 132, 255, 0.15);

  /* Glassmorphism - Enhanced translucency */
  --glass-bg: rgba(15, 20, 35, 0.45);
  --glass-bg-strong: rgba(15, 20, 35, 0.65);
  --glass-border: 1px solid rgba(255, 255, 255, 0.06);
  --glass-border-bright: 1px solid rgba(255, 255, 255, 0.12);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --glass-shadow-strong: 0 12px 48px 0 rgba(0, 0, 0, 0.5);

  /* Font Families */
  --font-primary: "Inter", "Noto Sans JP", sans-serif;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 60px;

  /* Transitions */
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-base);
  background-image: var(--gradient-body);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(1, 1, 3, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border-subtle);
  transition: all 0.3s var(--transition-smooth);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-container {
  width: 100%;
  max-width: 100%;
  padding: 0 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  font-style: italic;
  display: flex;
  align-items: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s var(--transition-smooth);
}

.header-logo:hover {
  opacity: 0.8;
  transform: translateY(-2px);
}

.logo-img {
  height: 55px;
  width: auto;
  object-fit: contain;
  display: block;
}

.header-logo:hover .logo-img {
  opacity: 0.8;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Base Buttons */
.btn-black-sm {
  background: linear-gradient(135deg, #0a84ff 0%, #0066cc 100%);
  color: #fff;
  padding: 11px 28px;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  letter-spacing: 0.08em;
  border-radius: 50px;
  transition: all 0.4s var(--transition-smooth);
  border: none;
  box-shadow: 0 4px 16px rgba(10, 132, 255, 0.25), 0 2px 4px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}

.btn-black-sm::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 var(--transition-smooth);
}

.btn-black-sm:hover::before {
  left: 100%;
}

.btn-black-sm:hover {
  box-shadow: 0 6px 24px rgba(10, 132, 255, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
  filter: brightness(1.15);
  transform: translateY(-2px);
}

/* Menu Button */
.menu-button {
  background: transparent;
  color: #fff;
  border: none;
  font-size: 28px;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  transition: opacity 0.3s ease;
}
.menu-button:hover {
  opacity: 0.8;
}

.hamburger-icon {
  font-size: 28px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s 0.4s, opacity 0.4s var(--transition-smooth);
}

.mobile-menu.active {
  visibility: visible;
  opacity: 1;
  transition: visibility 0s, opacity 0.4s var(--transition-smooth);
}

.mobile-menu-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px) saturate(120%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
}

.mobile-menu-content {
  position: fixed;
  top: 0;
  right: 0;
  width: 360px;
  max-width: 90vw;
  height: 100vh;
  background: linear-gradient(
    165deg,
    rgba(10, 26, 56, 0.95) 0%,
    rgba(3, 8, 18, 0.98) 100%
  );
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-left: 1px solid rgba(10, 132, 255, 0.15);
  box-shadow: -12px 0 48px rgba(0, 0, 0, 0.6),
    -2px 0 16px rgba(10, 132, 255, 0.1);
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 10001;
}

/* Animated gradient background */
.mobile-menu-content::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at 30% 50%,
    rgba(10, 132, 255, 0.08) 0%,
    transparent 50%
  );
  animation: menuGlow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes menuGlow {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.3;
  }
  100% {
    transform: translate(-20px, 20px) scale(1.1);
    opacity: 0.5;
  }
}

.mobile-menu.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(10, 20, 40, 0.4) 0%,
    transparent 100%
  );
}

.mobile-menu-logo {
  font-size: 24px;
  font-weight: 700;
  font-style: italic;
  display: flex;
  align-items: center;
}

.mobile-menu-logo .logo-img {
  height: 48px;
}

.menu-close {
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  padding: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s var(--transition-smooth);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.menu-close:hover {
  background: linear-gradient(
    135deg,
    rgba(10, 132, 255, 0.2),
    rgba(0, 229, 255, 0.15)
  );
  border-color: var(--color-accent-primary);
  transform: rotate(90deg) scale(1.05);
  box-shadow: 0 4px 16px rgba(10, 132, 255, 0.3);
}

.menu-close:active {
  transform: rotate(90deg) scale(0.95);
}

.mobile-menu-list {
  list-style: none;
  padding: 24px 0;
  margin: 0;
  flex: 1;
  overflow-y: auto;
  position: relative;
  z-index: 1;
}

.mobile-menu-list::-webkit-scrollbar {
  width: 4px;
}

.mobile-menu-list::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}

.mobile-menu-list::-webkit-scrollbar-thumb {
  background: rgba(10, 132, 255, 0.3);
  border-radius: 2px;
}

.mobile-menu-list::-webkit-scrollbar-thumb:hover {
  background: rgba(10, 132, 255, 0.5);
}

.mobile-menu-list li {
  margin: 0;
  position: relative;
}

.mobile-menu-link {
  display: block;
  padding: 20px 32px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all 0.4s var(--transition-smooth);
  border-left: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.mobile-menu-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(
    180deg,
    var(--color-accent-primary),
    var(--color-accent-secondary)
  );
  opacity: 0;
  transition: all 0.4s var(--transition-smooth);
  box-shadow: 0 0 12px var(--color-accent-primary);
}

.mobile-menu-link::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(10, 132, 255, 0.12) 0%,
    rgba(0, 229, 255, 0.06) 50%,
    transparent 100%
  );
  opacity: 0;
  transform: translateX(-100%);
  transition: all 0.5s var(--transition-smooth);
}

.mobile-menu-link:hover {
  color: #fff;
  padding-left: 40px;
  transform: translateX(4px);
}

.mobile-menu-link:hover::before {
  opacity: 1;
}

.mobile-menu-link:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.mobile-menu-link-highlight {
  color: var(--color-accent-primary);
  font-weight: 600;
  margin-top: 16px;
  background: linear-gradient(
    90deg,
    rgba(10, 132, 255, 0.15) 0%,
    rgba(0, 229, 255, 0.08) 70%,
    transparent 100%
  );
  border-left-color: var(--color-accent-primary);
  border-radius: 0 8px 8px 0;
}

.mobile-menu-link-highlight::before {
  opacity: 0.8;
  width: 4px;
}

.mobile-menu-link-highlight::after {
  background: linear-gradient(
    90deg,
    rgba(10, 132, 255, 0.18) 0%,
    rgba(0, 229, 255, 0.12) 50%,
    transparent 100%
  );
}

.mobile-menu-link-highlight:hover {
  color: #fff;
  background: linear-gradient(
    90deg,
    rgba(10, 132, 255, 0.25) 0%,
    rgba(0, 229, 255, 0.15) 60%,
    transparent 100%
  );
  box-shadow: inset 4px 0 12px rgba(10, 132, 255, 0.2);
}

.mobile-menu-link-highlight:hover::before {
  opacity: 1;
  box-shadow: 0 0 16px var(--color-accent-primary),
    0 0 8px var(--color-accent-secondary);
}

/* Hero Section - STRICTLY PRESERVED AS PER USER REQUEST */
/* Ensuring no global gradient interference */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  /* Force specific transparent background to show image only */
  background: transparent;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  /* User manually removed filter/opacity changes, so we respect that */
}

/* Overlay gradient - User removed this in previous manual edit, so keeping it generic or empty if they deleted content */
.hero-bg::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* No background overlay as per user revision */
}

.hero-content {
  color: #fff;
  padding: 0 80px;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 60px;
  position: relative;
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 5px;
  /* Keeping simple white or subtle gradient */
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}

.hero-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-bottom {
  position: absolute;
  bottom: 10px;
  left: 80px;
  right: 0;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.hero-tagline {
  font-size: 32px;
  font-weight: 500;

  margin: 0;
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  letter-spacing: 0.5px;
  text-align: left;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border: 1px solid currentColor;
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
}

/* White Box Button - Preserved Style */
.btn-white-box {
  background: transparent;
  color: #fff;
  border: 1px solid #fff;
  display: inline-block;
  padding: 12px 30px;
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
}

.btn-white-box:hover {
  background: #fff;
  color: #000;
}

/* Intro Section */
.section-intro {
  padding: 120px 80px;
  position: relative;
  text-align: center;
  background: radial-gradient(
      ellipse at 50% 30%,
      rgba(10, 132, 255, 0.06) 0%,
      transparent 60%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(0, 229, 255, 0.03) 0%,
      transparent 50%
    );
}

.section-intro::before {
  display: none;
}

.intro-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 5px;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: #fff;
  background: linear-gradient(
    135deg,
    #ffffff 0%,
    #e0e8f8 40%,
    #94d7ff 80%,
    #5eb8e8 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 4px 32px rgba(10, 132, 255, 0.25));
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  animation: titleGlow 3s ease-in-out infinite alternate;
}

.intro-subtitle {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 90px;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

@keyframes titleGlow {
  0% {
    filter: drop-shadow(0 4px 32px rgba(10, 132, 255, 0.25));
  }
  100% {
    filter: drop-shadow(0 4px 40px rgba(10, 132, 255, 0.4));
  }
}

/* Vision Styles */
.intro-vision {
  display: flex;
  flex-direction: column;
  gap: 90px;
  align-items: center; /* Center items flex-wise */
}

.vision-group {
  max-width: 800px;
  padding-left: 0;
  border-left: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.vision-heading {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--color-accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  display: flex;
  align-items: center;
  gap: 15px;
  border-bottom: none;
  padding-bottom: 0;
}

.vision-heading::before,
.vision-heading::after {
  content: "";
  display: block;
  width: 4px;
  height: 4px;
  background: var(--color-accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--color-accent-secondary);
  opacity: 0.8;
}

/* Add symmetrical dots for centered look */
.vision-heading::before {
  margin-right: 5px;
}
.vision-heading::after {
  margin-left: 5px;
}

.vision-text {
  font-size: 20px;
  line-height: 2;
  color: #e0e0e0;
  font-weight: 300;
  letter-spacing: 0.02em;
  text-align: center;
}

.vision-highlight {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.vision-text-small {
  font-size: 15px;
  line-height: 1.8;
  color: #8899a6;
  margin-top: 16px;
  font-weight: 400;
  text-align: center;
  max-width: 700px;
}

.vision-text-japanese {
  font-size: 16px;
  line-height: 2;
  color: #b0b8c0;
  font-weight: 400;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.divider {
  width: 48px;
  height: 48px;
  background: transparent;
  margin-top: 60px;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  transform: rotate(45deg);
  position: relative;
  border-radius: 6px;
  transition: all 0.5s var(--transition-smooth);
}

.divider::before {
  content: "";
  position: absolute;
  inset: -1.5px;
  border-radius: 6px;
  background: linear-gradient(
    135deg,
    var(--color-accent-primary),
    var(--color-accent-secondary)
  );
  opacity: 0;
  transition: opacity 0.5s var(--transition-smooth);
  animation: rotateBorder 4s linear infinite;
}

.divider:hover::before {
  opacity: 0.3;
}

.divider::after {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  width: 14px;
  height: 14px;
  background: var(--color-accent-secondary);
  opacity: 0.3;
  box-shadow: 0 0 16px var(--color-accent-secondary);
  transition: all 0.5s var(--transition-smooth);
}

.divider:hover::after {
  opacity: 0.6;
  box-shadow: 0 0 24px var(--color-accent-secondary);
}

@keyframes rotateBorder {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Science Section */
.section-science {
  padding: 80px 80px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 80px;
  background: linear-gradient(
      to bottom,
      transparent 0%,
      rgba(10, 132, 255, 0.03) 50%,
      transparent 100%
    ),
    radial-gradient(
      circle at 20% 80%,
      rgba(94, 92, 230, 0.05) 0%,
      transparent 50%
    );
}

.science-content {
  flex: 1;
  padding-top: 20px;
}

.science-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 40px;
  letter-spacing: 0.02em;
  color: #fff;
}

.science-body {
  max-width: 600px;
}

.science-text {
  font-size: 15px;
  line-height: 2;
  margin-bottom: 30px;
  color: #d1d5db;
  text-align: justify;
}

.science-image-wrapper {
  flex: 1;
}

.science-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6), 0 8px 24px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.5s var(--transition-smooth);
}

.science-image:hover {
  transform: translateY(-4px);
  box-shadow: 0 32px 80px rgba(10, 132, 255, 0.25),
    0 12px 32px rgba(0, 0, 0, 0.5);
  border-color: rgba(10, 132, 255, 0.2);
}

/* Feature Sections */
.section-features {
  padding-top: 60px;
  padding-bottom: 80px;
  padding-left: 80px;
  padding-right: 80px;
  background-color: transparent;
}

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

.section-subtitle {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
  text-transform: uppercase;
  color: var(--color-accent-secondary);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 30px;
  color: #fff;
}

.section-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

/* Problem Card Styles - Refined Glassmorphism */
.problem-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.5s var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
}

.problem-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 16px;
  padding: 1px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.02) 50%,
    rgba(10, 132, 255, 0.1) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s var(--transition-smooth);
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 229, 255, 0.2),
    0 8px 24px rgba(10, 132, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  background: var(--glass-bg-strong);
}

.problem-card:hover::before {
  opacity: 1;
}

.problem-card-header {
  background: #1c2f40;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 220px;
  width: 100%;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.problem-card-header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(10, 132, 255, 0.08) 0%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.5s var(--transition-smooth);
}

.problem-card:hover .problem-card-header::before {
  opacity: 1;
}

.problem-card-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-accent-secondary),
    transparent
  );
  opacity: 0.5;
  transition: opacity 0.5s var(--transition-smooth);
}

.problem-card:hover .problem-card-header::after {
  opacity: 1;
}

.problem-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: invert(0);
}

.problem-card-body {
  padding: 30px 25px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.problem-meta {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
  border-bottom: none;
  padding-bottom: 0;
}

.problem-number {
  width: 36px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 15px;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    rgba(10, 132, 255, 0.15) 0%,
    rgba(0, 229, 255, 0.15) 100%
  );
  color: var(--color-accent-secondary);
  border: 1.5px solid var(--color-accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.3),
    inset 0 1px 2px rgba(255, 255, 255, 0.2);
  transition: all 0.3s var(--transition-smooth);
  flex-shrink: 0;
}

.problem-card:hover .problem-number {
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.5),
    inset 0 1px 2px rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.problem-en-title {
  font-size: 11px;
  font-weight: 600;
  color: #8fa0b0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.problem-jp-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.5;
  color: #fff;
}

.problem-text {
  font-size: 13px;
  line-height: 2;
  color: var(--color-text-secondary);
  text-align: left;
}

/* Header variant for Metabolism cards */
.card-header-metabolism {
  justify-content: center;
  align-items: center;
}

.problem-icon-large {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: invert(0);
}

/* Application Section */
.section-application {
  padding-bottom: 100px;
  padding-left: 80px;
  padding-right: 80px;
  background: transparent;
}

.app-card {
  background: transparent;
  display: flex;
  flex-direction: column;
}

.app-image-wrapper {
  margin-bottom: 25px;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.2);
  position: relative;
  transition: all 0.5s var(--transition-smooth);
}

.app-image-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: linear-gradient(
    135deg,
    rgba(10, 132, 255, 0.1) 0%,
    rgba(0, 229, 255, 0.05) 100%
  );
  opacity: 0;
  transition: opacity 0.5s var(--transition-smooth);
}

.app-card:hover .app-image-wrapper {
  box-shadow: 0 16px 48px rgba(10, 132, 255, 0.3), 0 4px 16px rgba(0, 0, 0, 0.3);
  border-color: rgba(10, 132, 255, 0.2);
}

.app-card:hover .app-image-wrapper::after {
  opacity: 1;
}

.app-image {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
  z-index: 1;
}

.app-card:hover .app-image {
  transform: scale(1.08);
}

.app-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.app-tag {
  background: linear-gradient(
    135deg,
    rgba(10, 132, 255, 0.15) 0%,
    rgba(0, 229, 255, 0.1) 100%
  );
  color: #5db4ff;
  border: 1px solid rgba(10, 132, 255, 0.4);
  font-size: 10px;
  font-weight: 700;
  padding: 7px 14px;
  margin-bottom: 20px;
  display: inline-block;
  border-radius: 20px;
  letter-spacing: 0.08em;
  box-shadow: 0 2px 8px rgba(10, 132, 255, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: all 0.3s var(--transition-smooth);
}

.app-card:hover .app-tag {
  background: linear-gradient(
    135deg,
    rgba(10, 132, 255, 0.25) 0%,
    rgba(0, 229, 255, 0.15) 100%
  );
  border-color: rgba(10, 132, 255, 0.6);
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.app-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 20px;
  color: #fff;
}

.app-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  text-align: left;
}

/* Form Section */
.section-form {
  background: linear-gradient(
    135deg,
    rgba(25, 30, 45, 0.4) 0%,
    rgba(10, 12, 18, 0.4) 100%
  );
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
  padding: 80px 80px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.form-wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-right: 80px;
}

.form-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 30px;
  line-height: 1.3;
  color: #fff;
}

.form-desc {
  margin-bottom: 40px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.contact-form {
  width: 100%;
}

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  font-weight: 500;
  font-size: 13px;
  color: #ccc;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 16px;
  font-family: inherit;
  border-radius: 6px;
  color: #fff;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  background: rgba(10, 132, 255, 0.08);
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.15),
    0 4px 12px rgba(10, 132, 255, 0.1);
  transform: translateY(-1px);
}

.form-group textarea {
  height: 150px;
  resize: vertical;
}

/* Checkbox */
.form-group-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
}

.form-group-checkbox input {
  width: auto;
  margin: 0;
  accent-color: var(--color-accent-primary);
}

.form-group-checkbox label {
  font-size: 12px;
  margin: 0;
  color: #ccc;
}

.btn-black {
  background: linear-gradient(135deg, #0a84ff 0%, #0066cc 100%);
  color: #fff;
  border: none;
  padding: 16px 48px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  min-width: 140px;
  letter-spacing: 0.05em;
  border-radius: 8px;
  transition: all 0.4s var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(10, 132, 255, 0.35), 0 2px 8px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}

.btn-black::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 0.6s var(--transition-smooth);
}

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

.btn-black:hover {
  box-shadow: 0 6px 32px rgba(10, 132, 255, 0.5), 0 2px 12px rgba(0, 0, 0, 0.3);
  transform: translateY(-3px);
  filter: brightness(1.15);
}

.btn-black:active {
  transform: translateY(-1px);
  box-shadow: 0 2px 16px rgba(10, 132, 255, 0.4);
}

.form-image-wrapper {
  background: #020204;
  height: auto;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08); /* Subtle border */
  position: relative;
  overflow: hidden;
}

/* Decorative element for form image wrapper */
.form-image-wrapper::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(41, 121, 255, 0.1), transparent 60%);
  animation: pulse 10s infinite alternate;
}

.form-placeholder-image {
  width: 120px;
  height: 120px;
  background: rgba(30, 35, 50, 0.5);
  border-radius: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1;
  backdrop-filter: blur(5px);
}

.form-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  position: relative;
  z-index: 1;
}

/* Footer */
.footer {
  background: #000;
  padding: 60px 80px 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-container {
  width: 100%;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.footer-logo {
  font-family: cursive;
  font-weight: 700;
  font-size: 32px;
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
}

.footer-logo .logo-img {
  height: 60px;
  width: auto;
  object-fit: contain;
}

.footer-nav {
  display: flex;
  gap: 30px;
}

.footer-nav a {
  text-decoration: none;
  color: #9ca3af;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-social {
  display: flex;
  gap: 20px;
}

.social-icon {
  font-size: 20px;
  color: #9ca3af;
  text-decoration: none;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: all 0.4s var(--transition-smooth);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(4px);
}

.social-icon:hover {
  background: linear-gradient(135deg, #0a84ff 0%, #00e5ff 100%);
  color: #fff;
  border-color: var(--color-accent-primary);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 20px rgba(10, 132, 255, 0.4);
}

.social-icon-img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  transition: filter 0.3s ease;
}

.social-icon:hover .social-icon-img {
  filter: brightness(0) invert(1);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin-bottom: 30px;
}

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.copyright {
  font-size: 11px;
  color: #6b7280;
}

.privacy-link {
  font-size: 11px;
  color: #6b7280;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}
.privacy-link:hover {
  color: #fff;
}

/* Keyframes */
@keyframes pulse {
  0% {
    transform: scale(0.95);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.7;
  }
  100% {
    transform: scale(0.95);
    opacity: 0.4;
  }
}

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .footer-top {
    flex-direction: column;
    gap: 30px;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 768px) {
  /* Header adjustments for mobile */
  .header-container {
    padding: 0 20px;
  }

  .header-logo {
    font-size: 20px;
  }

  .header-logo .logo-img {
    height: 42px;
  }

  .mobile-menu-logo .logo-img {
    height: 38px;
  }

  .btn-black-sm {
    padding: 9px 20px;
    font-size: 11px;
  }

  .menu-button {
    font-size: 26px;
  }

  .hamburger-icon {
    font-size: 26px;
  }

  .header-actions {
    gap: 12px;
  }

  /* Section padding adjustments */
  .section-science,
  .section-form {
    flex-direction: column;
    padding-left: 20px;
    padding-right: 20px;
  }

  .section-intro,
  .section-features,
  .section-application {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section-intro {
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .section-form {
    grid-template-columns: 1fr;
    padding: 60px 20px;
  }

  .form-wrapper {
    padding-right: 0;
    margin-bottom: 40px;
  }

  .form-image-wrapper {
    display: none;
    min-height: 200px;
  }

  .hero-content {
    padding: 0 20px;
    padding-bottom: 40px;
  }

  .hero-bottom {
    bottom: 10px;
    left: 20px;
  }

  .grid-3 {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Mobile text adjustments */
  .hero-title {
    font-size: 28px;
    margin-bottom: 5px;
  }

  .hero-subtitle {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .hero-tagline {
    font-size: 20px;
  }

  .intro-title {
    font-size: 28px;
    margin-bottom: 5px;
  }

  .intro-subtitle {
    font-size: 14px;
    margin-bottom: 60px;
  }

  .vision-highlight {
    font-size: 20px;
  }

  .vision-text-japanese {
    font-size: 14px;
    line-height: 1.9;
  }

  .science-title {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .section-title {
    font-size: 28px;
  }

  .form-title {
    font-size: 28px;
  }

  .footer {
    padding: 40px 20px 30px;
  }

  .footer-logo {
    font-size: 28px;
  }

  .footer-logo .logo-img {
    height: 48px;
  }
}

/* ===== Privacy Policy Page ===== */
.privacy-policy-section {
  background: #000;
  min-height: 100vh;
  padding: 120px 0 80px;
}

.privacy-title {
  font-size: 48px;
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.privacy-date {
  text-align: center;
  color: #999;
  font-size: 14px;
  margin-bottom: 60px;
}

.privacy-content {
  max-width: 800px;
  margin: 0 auto;
}

.privacy-section {
  margin-bottom: 48px;
}

.privacy-heading {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(10, 132, 255, 0.5);
}

.privacy-text {
  font-size: 16px;
  line-height: 1.8;
  color: #ccc;
  margin-bottom: 16px;
}

.privacy-list {
  list-style: none;
  padding-left: 0;
  margin: 16px 0;
}

.privacy-list li {
  font-size: 16px;
  line-height: 1.8;
  color: #ccc;
  padding-left: 24px;
  position: relative;
  margin-bottom: 12px;
}

.privacy-list li::before {
  content: "•";
  position: absolute;
  left: 8px;
  color: #0a84ff;
  font-weight: bold;
}

.privacy-contact {
  background: rgba(10, 132, 255, 0.05);
  border: 1px solid rgba(10, 132, 255, 0.2);
  border-radius: 8px;
  padding: 24px;
  margin-top: 16px;
}

.privacy-contact p {
  font-size: 16px;
  color: #ccc;
  margin-bottom: 8px;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
  .privacy-policy-section {
    padding: 100px 0 60px;
  }

  .privacy-title {
    font-size: 32px;
  }

  .privacy-heading {
    font-size: 20px;
  }

  .privacy-text,
  .privacy-list li {
    font-size: 14px;
  }

  .privacy-content {
    padding: 0 20px;
  }
}

/* Privacy Policy Layout Enhancements */
.privacy-text-intro {
  font-size: 16px;
  line-height: 1.8;
  color: #ccc;
  margin-bottom: 32px;
}

.lang-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent-primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.privacy-divider {
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  margin: 60px 0;
  width: 100%;
}

.privacy-section .privacy-heading {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(10, 132, 255, 0.3);
}