/* ==========================================
   CREATIVITY UNLIMITED - Premium Monochrome Design
   Inspired by R/GA, AKQA, Goodpatch
   ========================================== */

/* ==========================================
   RESET & BASE
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors - Monochrome Base */
  --color-black: #0A0A0A;
  --color-dark: #1A1A1A;
  --color-medium: #333333;
  --color-gray: #4A4A4A; /* Improved contrast: was #666666 */
  --color-light-gray: #767676; /* WCAG AA compliant: 4.54:1 contrast ratio (was #999999: 2.8:1) */
  --color-off-white: #F5F5F5;
  --color-white: #FFFFFF;
  
  /* Accent Color - Minimal Usage */
  --color-accent: #0066FF; /* Blue accent */
  --color-accent-rgb: 0, 102, 255;
  
  /* Typography */
  --font-display: 'DM Sans', 'Inter', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', 'Inter', sans-serif;
  
  /* Font Weights */
  --weight-black: 900;
  --weight-bold: 700;
  --weight-semibold: 600;
  --weight-medium: 500;
  --weight-regular: 400;
  --weight-light: 300;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-2xl: 8rem;
  --spacing-3xl: 12rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1440px;
  --container-wide: 1600px;
  --header-height: 80px;
  
  /* Effects */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: var(--weight-regular);
  line-height: 1.7;
  color: var(--color-black);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ==========================================
   TYPOGRAPHY - Editorial Style
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0;
}

h1 {
  font-size: clamp(3rem, 10vw, 8rem);
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2rem, 6vw, 5rem);
  text-transform: uppercase;
}

h3 {
  font-size: clamp(1.5rem, 4vw, 3rem);
}

h4 {
  font-size: clamp(1.25rem, 3vw, 2rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
  margin: 0;
}

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

/* ==========================================
   LAYOUT UTILITIES
   ========================================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.container-full {
  width: 100%;
  padding: 0 var(--spacing-md);
}

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

.section-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

/* ==========================================
   HEADER - Fixed Navigation
   ========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: transparent;
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  height: 32px;
  transition: all var(--transition-base);
}

.logo img {
  height: 100%;
  width: auto;
  display: block;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

.nav-link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.nav-link:focus:not(:focus-visible) {
  outline: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

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

/* Mobile Menu Button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
}

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

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ==========================================
   HERO SECTION - Editorial Impact
   ========================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-off-white);
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  filter: grayscale(100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.hero-title {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: var(--weight-light);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-lg);
  color: var(--color-gray);
  animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.hero-description {
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.8;
  color: var(--color-gray);
  animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.6s both;
}

/* Graphic Overlays */
.hero-graphic {
  position: absolute;
  pointer-events: none;
  z-index: 1;
}

.hero-graphic-1 {
  top: 10%;
  right: 5%;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
}

.hero-graphic-2 {
  bottom: 10%;
  left: 5%;
  width: 200px;
  height: 200px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.hero-graphic-3 {
  top: 50%;
  left: 10%;
  width: 1px;
  height: 400px;
  background: linear-gradient(180deg, transparent, rgba(var(--color-accent-rgb), 0.2), transparent);
  transform: translateY(-50%) rotate(30deg);
}

/* ==========================================
   BUTTONS - Minimal & Bold
   ========================================== */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: var(--color-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn-primary:hover::before {
  width: 300px;
  height: 300px;
}

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

.btn:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn:focus:not(:focus-visible) {
  outline: none;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

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

.btn-outline:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* ==========================================
   SECTIONS - Content Blocks
   ========================================== */
.section-title {
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.section-title-small {
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.section-description {
  max-width: 800px;
  margin: var(--spacing-md) auto 0;
  text-align: center;
  color: var(--color-gray);
}

/* ==========================================
   STRENGTH SECTION - Three Pillars
   ========================================== */
.strengths {
  background-color: var(--color-off-white);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.strength-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.strength-item {
  padding: var(--spacing-lg);
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  background-color: var(--color-white);
}

.strength-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.strength-item:hover::before {
  transform: scaleX(1);
}

.strength-item:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.strength-number {
  font-size: 3rem;
  font-weight: var(--weight-black);
  color: rgba(0, 0, 0, 0.05);
  margin-bottom: var(--spacing-sm);
}

.strength-title {
  font-size: 1.5rem;
  font-weight: var(--weight-bold);
  margin-bottom: var(--spacing-sm);
}

.strength-description {
  color: var(--color-gray);
  line-height: 1.8;
}

/* ==========================================
   SERVICES - Card Grid
   ========================================== */
.services {
  background-color: var(--color-white);
}

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

.service-card {
  background-color: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transform: scaleX(0);
  transition: transform var(--transition-slow);
}

.service-card:hover::after {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-accent);
  border: 1px solid currentColor;
}

.service-title {
  font-size: 1.5rem;
  font-weight: var(--weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-black);
}

.service-description {
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.service-link {
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.service-link::after {
  content: '→';
  transition: transform var(--transition-base);
}

.service-link:hover::after {
  transform: translateX(4px);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  font-size: 1rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

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

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-base);
}

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

.footer-bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-note {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   RESPONSIVE - Mobile First
   ========================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 5rem;
  }
  
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    border-left: 1px solid rgba(0, 0, 0, 0.1);
  }
  
  .nav.active {
    transform: translateX(0);
  }
  
  .menu-toggle {
    display: block;
  }
  
  .strength-grid {
    grid-template-columns: 1fr;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .service-detail-content ul {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .strength-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================
   PAGE SPECIFIC STYLES
   ========================================== */

/* Services Detail Page */
.service-detail-hero {
  padding-top: calc(var(--header-height) + var(--spacing-xl));
  padding-bottom: var(--spacing-xl);
  background-color: var(--color-off-white);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.service-detail-content {
  padding: var(--spacing-xl) 0;
}

.service-detail-content h2 {
  margin-bottom: var(--spacing-md);
}

.service-detail-content ul {
  list-style: none;
  margin: var(--spacing-md) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.service-detail-content li {
  padding: var(--spacing-md);
  position: relative;
  color: var(--color-gray);
  background-color: var(--color-white);
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  transition: all var(--transition-base);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-weight: var(--weight-medium);
  line-height: 1.6;
}

.service-detail-content li:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.15);
}

.service-detail-content li::before {
  content: '✓';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-weight: var(--weight-bold);
  border-radius: 50%;
  font-size: 0.875rem;
  margin-top: 2px;
}

/* About Page */
.about-hero {
  padding-top: calc(var(--header-height) + var(--spacing-xl));
  padding-bottom: var(--spacing-xl);
}

.company-info {
  background-color: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-lg);
}

.company-info table {
  width: 100%;
  border-collapse: collapse;
}

.company-info th,
.company-info td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.company-info th {
  font-weight: var(--weight-semibold);
  width: 200px;
  color: var(--color-gray);
}

.company-info td {
  color: var(--color-black);
}

/* Contact Page */
.contact-form {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-lg);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm);
  background-color: var(--color-off-white);
  border: 1px solid rgba(0, 0, 0, 0.2);
  color: var(--color-black);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.form-checkbox input {
  width: auto;
  margin-top: 4px;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center {
  text-align: center;
}

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

.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-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); }

/* ==========================================
   INLINE STYLES TO CLASSES - REFACTORING
   ========================================== */

/* Footer company info text */
.footer-company-info {
  color: var(--color-light-gray);
  margin-top: var(--spacing-sm);
  line-height: 1.8;
}

/* Service detail page description */
.service-detail-description {
  color: var(--color-light-gray);
  line-height: 1.8;
}

/* About page map container */
.map-container {
  background-color: var(--color-white);
  border: 1px solid rgba(0,0,0,0.1);
  padding: var(--spacing-lg);
}

.map-container-text {
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
}

.map-container-address {
  color: var(--color-black);
}

.map-iframe-wrapper {
  width: 100%;
  height: 400px;
  border: 1px solid rgba(0,0,0,0.1);
  overflow: hidden;
}

.map-iframe {
  border: 0;
}

/* Contact page info box */
.contact-info-box {
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  background-color: var(--color-dark);
  border: 1px solid rgba(255,255,255,0.05);
  padding: var(--spacing-lg);
}

.contact-info-box h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
}

.contact-info-text {
  color: var(--color-light-gray);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.contact-info-note {
  color: var(--color-light-gray);
  line-height: 1.8;
  font-size: 0.875rem;
}

/* Google Forms container */
.google-form-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.google-form-container iframe {
  border: none;
}