/* ===================================
   Nicogory Website - Design System
   Deep Tech × Civic Direction
   =================================== */

:root {
  /* Color Palette */
  --color-base: #FAFBFC;
  --color-text: #2C3E50;
  --color-text-light: #6B7280;
  --color-primary: #0EA5E9;
  --color-secondary: #8B5CF6;
  --color-hero-bg: #0F172A;
  --color-white: #FFFFFF;
  --color-border: #E5E7EB;
  --color-shadow: rgba(0, 0, 0, 0.08);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro', 'Helvetica Neue', 'Noto Sans JP', sans-serif;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-h1: 56px;
  --font-size-h2: 36px;
  --font-size-h3: 24px;
  --font-size-caption: 13px;
  --line-height-base: 1.7;
  --line-height-heading: 1.2;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  --spacing-section: 120px;
  
  /* Layout */
  --container-max: 1440px;
  --content-max: 720px;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  
  /* Effects */
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 16px var(--color-shadow);
  --shadow-lg: 0 8px 32px var(--color-shadow);
  --transition: 200ms ease;
}

/* ===================================
   Reset & Base
   =================================== */

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-base);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--color-secondary);
}

/* ===================================
   Layout
   =================================== */

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

.container-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-section) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
}

.header .container {
  padding: 0 var(--spacing-lg);
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--spacing-xl);
  padding: var(--spacing-sm) 0;
  position: relative;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-lg);
  list-style: none;
  flex-wrap: nowrap;
}

.nav-menu li {
  display: flex;
  align-items: stretch;
}

.nav-link {
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  width: 100%;
  transition: color var(--transition);
}

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

.nav-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

.nav-cta .btn {
  width: auto;
}

.nav-more {
  position: relative;
}

.nav-more-toggle {
  background: none;
  border: none;
  font: inherit;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px 0;
}

.nav-more-toggle::after {
  content: '';
  display: inline-block;
  margin-left: 6px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-text);
}

.nav-more-menu {
  position: absolute;
  right: 0;
  top: calc(100% + var(--spacing-xs));
  display: none;
  flex-direction: column;
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  min-width: 220px;
  z-index: 1001;
}

.nav-more:hover .nav-more-menu,
.nav-more:focus-within .nav-more-menu {
  display: flex;
}

.nav-more:hover .nav-more-toggle::after,
.nav-more:focus-within .nav-more-toggle::after {
  border-top-color: var(--color-primary);
}

.nav-more-menu .nav-link {
  padding: 8px 0;
  color: var(--color-text);
}

.nav-more-menu .nav-link:hover {
  color: var(--color-primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  justify-self: end;
  margin-left: auto;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all var(--transition);
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--border-radius-sm);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: #0284C7;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary:visited,
.btn-primary:active,
.btn-primary:focus {
  color: var(--color-white);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-text);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-hero-bg) 0%, #1E293B 100%);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  margin-top: 0;
  padding-top: calc(72px + var(--spacing-lg));
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: 
    radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
    linear-gradient(45deg, transparent 48%, rgba(139, 92, 246, 0.05) 50%, transparent 52%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-tagline {
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.hero-title {
  font-size: 64px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  background: linear-gradient(135deg, #FFFFFF 0%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.9);
}

.hero-description {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ===================================
   Cards
   =================================== */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

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

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

.cards-grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

.card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.focus-area-card {
  padding: var(--spacing-md) var(--spacing-sm);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-description {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===================================
   Section Headings
   =================================== */

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===================================
   Steps
   =================================== */

.steps {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.step {
  flex: 1;
  position: relative;
}

.step::after {
  content: '';
  position: absolute;
  top: 24px;
  right: -32px;
  width: 32px;
  height: 2px;
  background: var(--color-border);
}

.step:last-child::after {
  display: none;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.step-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.step-description {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===================================
   Company Information
   =================================== */

.company-info-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.company-info-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.company-info-item:last-child {
  border-bottom: none;
}

.company-info-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.company-info-value {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
}

/* ===================================
   Footer
   =================================== */

.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  text-decoration: none;
  display: inline-block;
  transition: opacity var(--transition);
}

.footer-logo:hover {
  opacity: 0.8;
}

.footer-description {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.footer-section h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

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

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1100px) {
  .nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: var(--spacing-sm);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-more-toggle {
    display: none;
  }
  
  .nav-more-menu {
    position: static;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: 0;
    box-shadow: none;
    border: none;
    background: transparent;
    min-width: 0;
  }
  
  .nav-more-menu .nav-link {
    padding: 6px 0;
  }
}

@media (max-width: 1024px) {
  .cards-grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .steps {
    flex-direction: column;
  }
  
  .step::after {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-h1: 42px;
    --font-size-h2: 28px;
    --font-size-h3: 20px;
    --spacing-section: 80px;
  }
  
  .header .container {
    padding: 0 var(--spacing-lg);
  }
  
  .hero-title {
    font-size: 42px;
  }
  
  .hero-subtitle {
    font-size: 22px;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .cards-grid,
  .cards-grid-2,
  .cards-grid-3,
  .cards-grid-5 {
    grid-template-columns: 1fr;
  }
  
  /* Focus Areas: 2 columns on small screens */
  .cards-grid-5.focus-area-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .company-info-item {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .company-info-label {
    font-weight: 600;
    color: var(--color-text-light);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 18px;
  }
}

/* ===================================
   Utilities
   =================================== */

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

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

.bg-white {
  background: var(--color-white);
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }