:root {
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-dark: #070a13;
  --color-bg-darker: #020408;

  --color-text-primary: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-text-light: #f8fafc;

  --color-accent-primary: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: rgba(37, 99, 235, 0.1);
  --color-border: #e2e8f0;
  --color-border-dark: rgba(255, 255, 255, 0.1);

  --font-family-en: 'Inter', sans-serif;
  --font-family-jp: 'Noto Sans JP', sans-serif;
  
  --container-max: 1200px;
  --container-md: 900px;
  --container-sm: 760px;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-family-jp);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; letter-spacing: 0.05em; margin-bottom: 1rem; }
p { margin-bottom: 1rem; }
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.text-center { text-align: center; }
.text-primary { color: var(--color-accent-primary); }
.text-white { color: var(--color-text-light); }
.text-white-50 { color: rgba(255, 255, 255, 0.7); }
.text-muted { color: var(--color-text-muted); }
.lead { font-size: 1.15rem; font-weight: 500; margin-bottom: 1.5rem; }
.small { font-size: 0.875rem; }

/* Layout Utilities */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 5%; }
.container-md { max-width: var(--container-md); }
.container-sm { max-width: var(--container-sm); }

.section { padding: 100px 0; }
.bg-light { background-color: var(--color-bg-secondary); }
.dark-section { background-color: var(--color-bg-dark); color: var(--color-text-light); }

.mt-sm { margin-top: 1.5rem; } .mt-md { margin-top: 3rem; } .mt-lg { margin-top: 5rem; } .mt-xl { margin-top: 8rem; }
.mb-sm { margin-bottom: 1.5rem; } .mb-md { margin-bottom: 3rem; } .mb-lg { margin-bottom: 5rem; } .mb-xl { margin-bottom: 8rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.8rem 2.5rem; border-radius: 4px; font-weight: 700;
  letter-spacing: 0.05em; cursor: pointer; transition: var(--transition-normal);
}
.btn-primary { background-color: var(--color-accent-primary); color: #fff; border: 1px solid var(--color-accent-primary); }
.btn-primary:hover { background-color: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2); color: #fff; }
.btn-outline { background-color: transparent; color: var(--color-text-primary); border: 2px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-accent-primary); color: var(--color-accent-primary); }
.dark-section .btn-outline { color: var(--color-text-light); border-color: rgba(255,255,255,0.3); }
.dark-section .btn-outline:hover { background-color: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }

/* ================= Header & Nav ================= */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 15px 0; transition: var(--transition-normal); border-bottom: 1px solid rgba(255,255,255,0.1); }
.header.scrolled, .header.solid { background-color: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); border-bottom: 1px solid var(--color-border); }
.header-container { display: flex; justify-content: space-between; align-items: center; max-width: 1400px; margin: 0 auto; padding: 0 3%; }

.logo { font-family: var(--font-family-en); font-size: 1.2rem; font-weight: 900; color: var(--color-text-light); line-height: 1.1; }
.logo span { font-family: var(--font-family-jp); font-size: 0.7rem; display: block; opacity: 0.9; font-weight: 500; }
.header.scrolled .logo, .header.solid .logo { color: var(--color-text-primary); }

.nav-menu ul { display: flex; align-items: center; gap: 1.5rem; }
.nav-menu > ul > li { position: relative; }
.nav-menu a { color: var(--color-text-light); font-weight: 500; font-size: 0.95rem; padding: 0.5rem 0; display: flex; align-items: center; gap: 0.3rem;}
.header.scrolled .nav-menu a, .header.solid .nav-menu a { color: var(--color-text-primary); }
.nav-menu a:hover { color: var(--color-accent-primary); }

/* Dropdown styling */
.nav-menu .has-dropdown .dropdown-icon { font-size: 0.7em; transition: transform 0.2s; }
.nav-menu li:hover .dropdown-icon { transform: rotate(180deg); }
.dropdown {
  position: absolute; top: 100%; left: 0; background: #fff;
  min-width: 260px; border-radius: 4px; box-shadow: 0 10px 40px rgba(0,0,0,0.1);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all 0.3s ease; display: flex; flex-direction: column; gap: 0;
  padding: 10px 0; border: 1px solid var(--color-border);
}
.nav-menu li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a { color: var(--color-text-primary) !important; padding: 12px 20px; font-size: 0.9rem; border-bottom: 1px solid var(--color-border); }
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover { background-color: var(--color-bg-secondary); color: var(--color-accent-primary) !important; padding-left: 25px; }

.header-cta { padding: 0.6rem 1.5rem; font-size: 0.9rem; }

/* ================= Hero Sections ================= */
.hero { position: relative; height: 100vh; min-height: 600px; display: flex; align-items: center; overflow: hidden; }
.hero-sub { height: 50vh; min-height: 350px; } /* For sub pages */
.hero-bg { position: absolute; inset: 0; z-index: 1; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; animation: slideScale 10s ease-out forwards; }
@keyframes slideScale { 0% { transform: scale(1.1); } 100% { transform: scale(1); } }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(2, 4, 8, 0.95), rgba(2, 4, 8, 0.7)); z-index: 2; }
.hero-content { position: relative; z-index: 3; width: 100%; padding-top: 50px; }
.hero-title { font-size: clamp(2rem, 4vw, 4rem); letter-spacing: 0.1em; line-height: 1.3; }
.hero-title .highlight { font-size: clamp(1rem, 2vw, 1.5rem); font-weight: 500; color: var(--color-accent-primary); letter-spacing: 0.15em; display: block; margin-bottom: 1rem; }

/* Sub Page Hero */
.page-title { font-size: clamp(2rem, 3.5vw, 3rem); margin-bottom: 1rem; }
.page-subtitle { font-size: 1.1rem; color: rgba(255,255,255,0.7); max-width: 600px; }

/* ================= Content Blocks & Components ================= */
.section-title { font-size: 2.2rem; margin-bottom: 3rem; text-align: center; }
.section-header { text-align: center; margin-bottom: 4rem; }

.highlight-box { background: #fff; padding: 3rem; border-radius: 8px; box-shadow: 0 20px 40px rgba(0,0,0,0.05); border-top: 4px solid var(--color-accent-primary); text-align: center;}
.highlight-box h3 { font-size: 1.4rem; color: var(--color-text-secondary); margin-bottom: 1rem; }

/* Image Text Grid */
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.content-grid.reverse .cg-img { order: -1; }
.cg-img img { border-radius: 8px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

/* Person Profiles */
.profile-box { background: #fff; padding: 2.5rem; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.03); margin-bottom: 2rem; border-left: 4px solid var(--color-accent-primary);}
.profile-title { font-size: 1.3rem; margin-bottom: 0.5rem; color: var(--color-accent-primary); }
.profile-name { font-size: 1.5rem; font-weight: 900; margin-bottom: 1rem; }
.profile-desc { color: var(--color-text-secondary); font-size: 0.95rem; }

/* Cards Grid */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.grid-cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-cols-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

.card { background: #fff; padding: 2.5rem; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.03); border: 1px solid var(--color-border); transition: var(--transition-normal); height: 100%;}
.card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
.card-icon { font-size: 2.5rem; color: var(--color-accent-primary); margin-bottom: 1.5rem; font-weight: 900; font-family: var(--font-family-en); }

/* Comparison Table (Pricing/Steps) */
.comparison-table { width: 100%; border-collapse: collapse; margin: 3rem 0; background: #fff; box-shadow: 0 10px 30px rgba(0,0,0,0.03); border-radius: 8px; overflow: hidden; }
.comparison-table th, .comparison-table td { padding: 1.5rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.comparison-table th { background: var(--color-bg-dark); color: #fff; font-weight: 500; letter-spacing: 0.05em; }
.comparison-table tr:last-child td { border-bottom: none; }
.star { color: #fbbf24; font-size: 1.2rem; }

/* Form Elements */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-weight: 700; margin-bottom: 0.5rem; font-size: 0.95rem; }
.form-label .required { color: #e11d48; margin-left: 0.5rem; font-size: 0.8em; }
.form-control { width: 100%; padding: 1rem; border: 1px solid var(--color-border); border-radius: 4px; font-family: inherit; font-size: 1rem; transition: var(--transition-fast); background: #fff; }
.form-control:focus { outline: none; border-color: var(--color-accent-primary); box-shadow: 0 0 0 3px var(--color-accent-light); }
textarea.form-control { min-height: 150px; resize: vertical; }

.form-box { background: #fff; padding: 3rem; border-radius: 8px; box-shadow: 0 20px 40px rgba(0,0,0,0.05); }

/* Case Studies Top */
.case-card { display: flex; flex-direction: column; }
.case-quote { font-style: italic; color: var(--color-text-secondary); margin: 1.5rem 0; flex-grow: 1; }

/* Submenu Links block */
.submenu-links { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; margin-top: 2rem; }

/* Footer */
.footer { background: var(--color-bg-darker); color: var(--color-text-muted); padding: 5rem 0 2rem; text-align: center; }
.footer-logo { font-size: 1.5rem; font-family: var(--font-family-en); font-weight: 900; color: #fff; margin-bottom: 2rem; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 2rem; margin-bottom: 3rem; }
.footer-links a:hover { color: #fff; }

/* Animation Reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive Settings */
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; color: inherit; }
.mobile-menu-btn svg { width: 30px; height: 30px; }

@media (max-width: 992px) {
  .nav-menu { display: none; } /* Simplified for this demo */
  .mobile-menu-btn { display: block; color: var(--color-text-light); }
  .header.scrolled .mobile-menu-btn, .header.solid .mobile-menu-btn { color: var(--color-text-primary); }
  .header-cta { display: none; }
  .content-grid { grid-template-columns: 1fr; }
  .content-grid.reverse .cg-img { order: 0; }
  .comparison-table { display: block; overflow-x: auto; white-space: nowrap; }
  .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
}