/* KSR Website */
:root {
  --black: #000000;
  --white: #FFFFFF;
  --gray: #999999;
  --gray-light: #FAFAFA;
  --gray-dark: #333333;
  --orange: #FF7A00;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Segoe UI', Arial, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 300;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

/* Typography - Ultra Light */
h1, h2, h3, h4, h5, h6 {
  font-weight: 300;
  line-height: 1.2;
  color: var(--black);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 4rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  font-weight: 400;
}

p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray);
}

/* Header - Minimal with Fade */
header {
  background: var(--white);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--gray-light);
  transition: all 0.6s var(--ease-out-expo);
  opacity: 0;
  transform: translateY(-20px);
}

header.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===== Header Logo Fix ===== */
.logo {
  height: 40px;
  flex-shrink: 0;
}

.logo img {
  height: 40px;     /* ← 100% をやめる */
  max-height: 40px;
  width: auto;
  display: block;
}

.logo:hover {
  transform: scale(1.05);
}

.logo img:hover {
  opacity: 0.7;
}

/* Logo alignment */
.logo {
  display: flex;
  align-items: center;
}
.logo a {
  display: inline-flex;
  align-items: center;
}

@media (max-width: 768px) {
  .logo img {
    height: 32px;
    max-height: 32px;
  }
}

nav ul {
  display: flex;
  list-style: none;
  gap: 3rem;
}

nav a {
  color: var(--black);
  text-decoration: none;
  font-weight: 300;
  font-size: 0.9rem;
  transition: all 0.4s var(--ease-out-expo);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--orange);
  transition: width 0.5s var(--ease-out-expo);
}

nav a:hover::after {
  width: 100%;
}

nav a:hover {
  color: var(--orange);
  transform: translateY(-2px);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--black);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  font-weight: 200;
}

/* Hero - Animated Entry with Logo Animation */
.hero {
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  padding: 200px 3rem 200px;
  text-align: center;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(0, 0, 0, 0.7) 0%, 
    rgba(0, 0, 0, 0.5) 50%, 
    rgba(0, 0, 0, 0.7) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

/* Hero Logo Animation */
.hero-logo {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(3);
  z-index: 10000;
  opacity: 0;
  animation: logoIntro 2.5s var(--ease-out-expo) forwards;
  pointer-events: none;
}

.hero-logo img {
  height: 120px;
  width: auto;
}

@keyframes logoIntro {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(3) rotate(0deg);
  }
  30% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(2.5) rotate(360deg);
  }
  60% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(720deg);
  }
  80% {
    opacity: 1;
    transform: translate(calc(-50vw + 150px), calc(-50vh + 52px)) scale(0.42) rotate(1080deg);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50vw + 150px), calc(-50vh + 52px)) scale(0.42) rotate(1080deg);
    pointer-events: none;
  }
}

/* Hide header logo during intro */
header.logo-animating .logo {
  opacity: 0;
}

/* Hero - Animated Entry */

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  opacity: 1;
  text-align: center;
}

.hero-content.content-visible {
  opacity: 1;
  transition: opacity 0.6s ease;
}

.hero .subtitle {
  color: var(--orange);
  font-weight: 300;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 5rem;
  gap: 0.2rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero .subtitle-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
}

.hero .subtitle-grid::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 1px;
  height: 120%;
  background: var(--orange);
  opacity: 0.3;
}

.hero .subtitle-grid::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  background: var(--orange);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(255, 122, 0, 0.1);
}

.hero .subtitle-left {
  position: relative;
  padding-right: 2rem;
}

.hero .subtitle-ksr-main {
  font-size: 3.5rem;
  font-weight: 200;
  letter-spacing: 0.4em;
  color: var(--orange);
  line-height: 1;
  display: block;
  font-family: 'Arial', sans-serif;
  position: relative;
}

.hero .subtitle-ksr-main::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, 
    var(--orange) 0%, 
    var(--orange) 30%, 
    transparent 100%);
}

.hero .subtitle-right {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-left: 2rem;
  align-items: flex-start;
}

.hero .subtitle-text {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  /* color: var(--white); */
  color: #333;
  text-transform: capitalize;
  line-height: 1.5;
  display: block;
  position: relative;
  padding-left: 0;
  opacity: 0.9;
  text-align: left;
}

/* Hero animations */
.hero .subtitle {
  opacity: 1;
  transform: translateY(0);
}

.hero .subtitle.animate-in {
  opacity: 0;
  transform: translateY(15px);
  animation: fadeInUpSmooth 2s cubic-bezier(0.16, 1, 0.3, 1) 0s forwards;
}

.hero .hero-message {
  margin-bottom: 0;
  display: block !important;
  visibility: visible !important;
  opacity: 1;
  transform: translateY(0);
}

.hero .hero-message.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUpSmooth 2.2s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
}

.hero .hero-message p {
  font-size: clamp(1.05rem, 2.7vw, 1.8rem);
  line-height: clamp(1.7, 3vw, 1.8);
  color: var(--gray-dark);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 0;
  margin-bottom: clamp(2rem, 5vw, 4rem);
  text-shadow: 0px 0px 2px rgba(0, 0, 0, 0.4);
}

.hero .hero-description {
  display: block !important;
  visibility: visible !important;
  opacity: 1;
  transform: translateY(0);
}

.hero .hero-description.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUpSmooth 2.2s cubic-bezier(0.16, 1, 0.3, 1) 1.2s forwards;
}

.hero .hero-description p {
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  line-height: clamp(1.8, 3vw, 1.9);
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
  color: var(--gray-dark);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-shadow: 0px 0px 2px rgba(0, 0, 0, 0.4);
}

.hero-description p:last-child {
  margin-bottom: 0;
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* スムーズなアニメーション */
@keyframes fadeInUpSmooth {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  60% {
    opacity: 0.8;
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero .subtitle.animate-in {
}

.hero .subtitle.animate-in .subtitle-ksr {
}

.hero .subtitle.animate-in .subtitle-line:nth-child(2) {
}

.hero .subtitle.animate-in .subtitle-line:nth-child(3) {
}

.hero .subtitle.animate-in .subtitle-line:nth-child(4) {
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* スムーズなアニメーション */
@keyframes fadeInUpSmooth {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  60% {
    opacity: 0.8;
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInFromRight {
  0% {
    opacity: 0;
    transform: translateX(30px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromLeft {
  0% {
    opacity: 0;
    transform: translateX(-60px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  0% {
    opacity: 0;
    transform: translateX(40px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.hero p {
  font-size: 1.15rem;
  line-height: 2.2;
  margin-bottom: 3rem;
  /* color: var(--gray-light); */
  color: var(--black);
  font-weight: 300;
}

.hero p:nth-of-type(2) {
  margin-bottom: 3.5rem;
}

.hero p:nth-of-type(3) {
  margin-bottom: 0;
}

.hero p.animate-in:nth-of-type(2) {
  animation: fadeInSlide 1.3s var(--ease-out-expo) 0.6s forwards;
}

.hero p.animate-in:nth-of-type(3) {
  animation: fadeInSlide 1.3s var(--ease-out-expo) 0.9s forwards;
}

@keyframes fadeInSlide {
  0% {
    opacity: 0;
    transform: translateY(30px) translateX(-10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) translateX(0);
  }
}

/* Scroll-triggered Animations */
.scroll-fade-in {
  opacity: 0;
  transform: translateY(60px);
  transition: all 1s var(--ease-out-expo);
}

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

.scroll-fade-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: all 1s var(--ease-out-expo);
}

.scroll-fade-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.scroll-fade-right {
  opacity: 0;
  transform: translateX(60px);
  transition: all 1s var(--ease-out-expo);
}

.scroll-fade-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.scroll-scale {
  opacity: 0;
  transform: scale(0.9);
  /* transition: all 1s var(--ease-out-expo); */
  transition: opacity 1s var(--ease-out-expo), transform 1s var(--ease-out-expo);
}

.scroll-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger Animation for Cards */
.stagger-item {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s var(--ease-out-expo);
}

.stagger-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-item:nth-child(1) { transition-delay: 0s; }
.stagger-item:nth-child(2) { transition-delay: 0.1s; }
.stagger-item:nth-child(3) { transition-delay: 0.2s; }
.stagger-item:nth-child(4) { transition-delay: 0.3s; }
.stagger-item:nth-child(5) { transition-delay: 0.4s; }
.stagger-item:nth-child(6) { transition-delay: 0.5s; }
.stagger-item:nth-child(7) { transition-delay: 0.6s; }
.stagger-item:nth-child(8) { transition-delay: 0.7s; }

/* Sections - Generous Spacing */
section {
  padding: 150px 3rem;
  position: relative;
}

#services {
  background: var(--gray-light);
  padding-top: 150px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 5rem;
}

.section-title h2 {
  font-weight: 200;
}

/* Services Grid - Animated Cards */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 3rem;
  margin-top: 4rem;
}

.service-card {
  background: var(--white);
  padding: 3rem 2rem;
  transition: all 0.6s var(--ease-out-expo);
  border-bottom: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--orange);
  transition: width 0.8s var(--ease-out-expo);
}

.service-card:hover {
  transform: translateY(-8px);
}

.service-card:hover::before {
  width: 100%;
}

.service-card h3 {
  margin-bottom: 1rem;
  color: var(--black);
  font-weight: 400;
  transition: all 0.4s var(--ease-out-expo);
}

.service-card:hover h3 {
  color: var(--orange);
  transform: translateX(5px);
}

.service-card p {
  color: var(--gray);
  line-height: 1.8;
  font-size: 0.95rem;
  font-weight: 300;
}
.service-card .service-link {
  text-align: left;
  margin-top:0.8rem;
}

.service-card .service-link img {
  width: 60%;
  max-width: 288px;
}

.service-link + a.btn {
  width: 60%;
  display: block;
  text-align: center;
  margin:0.8rem 0 0;
}

@media (max-width: 768px) {
.service-card .service-link {
  text-align: center;
  margin-top:1.2rem;
}

.service-card .service-link img {
  width: 100%;
}
.service-link + a.btn {
  width: 100%;
  margin:1.2rem auto 0;
}


}


/* Works Grid - GYRE-inspired Advanced Gallery */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.work-card {
  background: var(--white);
  transition: all 0.6s var(--ease-out-expo);
  border: 1px solid var(--gray-light);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.work-card-image {
  width: 100%;
  height: 280px;
  overflow: hidden;
  position: relative;
  background: var(--black);
}

.work-card-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.3) 100%);
  z-index: 1;
  opacity: 0;
  transition: opacity 0.6s var(--ease-out-expo);
}

.work-card:hover .work-card-image::before {
  opacity: 1;
}

.work-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.8s var(--ease-out-expo);
  filter: grayscale(0%);
}

.work-card:hover .work-card-image img {
  transform: scale(1.1);
  filter: grayscale(20%);
}

/* Image Overlay Effect */
.work-card-image::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  border: 2px solid var(--white);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: all 0.5s var(--ease-out-expo);
  z-index: 2;
}

.work-card:hover .work-card-image::after {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.work-card-content {
  padding: 2rem;
  position: relative;
  background: var(--white);
  transition: all 0.4s var(--ease-out-expo);
}

/* Orange Line Reveal */
.work-card::before {
  content: '';
  position: absolute;
  top: 280px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--orange);
  transition: width 0.6s var(--ease-out-expo);
  z-index: 2;
}

.work-card:hover::before {
  width: 100%;
}

/* Border Animation */
.work-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 2px solid var(--orange);
  opacity: 0;
  transform: scale(0.95);
  transition: all 0.5s var(--ease-out-expo);
  pointer-events: none;
}

.work-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border-color: transparent;
}

.work-card:hover::after {
  opacity: 1;
  transform: scale(1);
}

.work-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--black);
  font-weight: 400;
  transition: all 0.4s var(--ease-out-expo);
  transform: translateY(0);
}

.work-card:hover h3 {
  color: var(--orange);
  transform: translateY(-3px);
}

.work-card .project-name {
  font-size: 0.95rem;
  color: var(--gray);
  font-weight: 300;
  margin-bottom: 0.3rem;
  transition: all 0.3s var(--ease-out-expo);
  opacity: 1;
}

.work-card:hover .project-name {
  color: var(--black);
  opacity: 0.8;
}

.work-card .role {
  font-size: 0.85rem;
  color: var(--gray);
  font-weight: 300;
  transition: all 0.3s var(--ease-out-expo);
  display: inline-block;
}

.work-card:hover .role {
  color: var(--orange);
  transform: translateX(5px);
}

/* Parallax Effect for Work Cards */
.work-card.parallax-card {
  transition: transform 0.3s ease-out;
}

/* Loading Animation for Images */
.work-card-image img {
  animation: imageReveal 0.8s var(--ease-out-expo) forwards;
}

@keyframes imageReveal {
  from {
    opacity: 0;
    transform: scale(1.1);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Stagger Animation Enhancement */
.work-card.stagger-item {
  opacity: 0;
  transform: translateY(60px) scale(0.95);
  transition: all 0.8s var(--ease-out-expo);
}

.work-card.stagger-item.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Number Counter (optional) */
.work-card-number {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 3rem;
  font-weight: 200;
  color: var(--white);
  opacity: 0;
  transition: all 0.5s var(--ease-out-expo);
  z-index: 3;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.work-card:hover .work-card-number {
  opacity: 0.5;
}

/* Responsive Grid Adjustments */
@media (max-width: 768px) {
  .work-card-image {
    height: 220px;
  }
  
  .work-card::before {
    top: 220px;
  }
}

/* Company Info - Smooth Reveal */
.company-info {
  background: var(--white);
  border: 1px solid var(--gray-light);
  padding: 4rem;
  max-width: 800px;
  margin: 0 auto;
  transition: all 0.6s var(--ease-out-expo);
}

.company-info:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
  transform: translateY(-5px);
}

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

.company-info tr {
  border-bottom: 1px solid var(--gray-light);
  transition: all 0.3s var(--ease-out-expo);
}

.company-info tr:hover {
  background: var(--gray-light);
}

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

.company-info th,
.company-info td {
  padding: 2rem 1rem;
  text-align: left;
}

.company-info th {
  font-weight: 400;
  width: 200px;
  color: var(--black);
  font-size: 0.9rem;
}

.company-info td {
  color: var(--gray);
  font-weight: 300;
  font-size: 0.95rem;
}

/* Privacy Policy */
.privacy-content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 2;
}

.privacy-content h3 {
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--black);
  font-size: 1.25rem;
  font-weight: 400;
}

.privacy-content p {
  margin-bottom: 1.5rem;
  color: var(--gray);
  font-weight: 300;
}

.privacy-content ol {
  margin-left: 2rem;
  margin-bottom: 2rem;
}

.privacy-content li {
  margin-bottom: 1rem;
  color: var(--gray);
  font-weight: 300;
}

/* Footer - Minimal */
footer {
  background: var(--white);
  color: var(--gray);
  padding: 4rem 3rem;
  text-align: center;
  border-top: 1px solid var(--gray-light);
}

footer p {
  color: var(--gray);
  font-size: 0.85rem;
  font-weight: 300;
}

/* Buttons - Animated (fixed for iOS Safari) */
.btn {
  -webkit-appearance: none;
  appearance: none;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  line-height: 1;

  padding: 1rem 3rem;
  background: var(--black);
  color: var(--white);
  text-decoration: none;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.1em;

  border: 1px solid var(--black);
  font-size: 0.85rem;

  position: relative;
  overflow: hidden;

  transition: transform 0.5s var(--ease-out-expo),
              box-shadow 0.5s var(--ease-out-expo),
              border-color 0.5s var(--ease-out-expo),
              color 0.5s var(--ease-out-expo);

  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}
.btn span { position: relative; z-index: 1; }

.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--black);
}

@media (hover: hover) and (pointer: fine) {
  .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--orange);
    transform: translate(-50%, -50%);
    transition: all 0.6s var(--ease-out-expo);
  }

  .btn:hover::before {
    width: 300%;
    height: 300%;
  }

  .btn:hover {
    color: var(--white);
    border-color: var(--orange);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 122, 0, 0.2);
  }

}

/* タッチ端末では、hover/active/focusで見た目が変わらないように固定 */
@media (hover: none), (pointer: coarse) {
  .btn::before { content: none !important; display: none !important; }
  .btn:hover,
  .btn:active,
  .btn:focus,
  .btn:focus-visible {
    transform: none !important;
    box-shadow: none !important;
  }
}

/* Orange Accent Elements */
.accent {
  color: var(--orange);
}

/* CTA Sections with Parallax */
.cta-section {
  background: var(--gray-dark);
  color: var(--white);
  text-align: center;
  padding: 120px 3rem;
  position: relative;
  overflow: hidden;
}

.cta-section .container {
  max-width: 800px;
  margin: 0 auto;
}

.cta-section h2 {
  color: var(--white);
  font-weight: 200;
  margin-bottom: 2rem;
}

.cta-section p {
  color: #CCCCCC;
}

.cta-dark {
  background: var(--black);
  color: var(--white);
}

.cta-dark h2 {
  color: var(--white);
}

.cta-dark p {
  color: var(--gray);
}

/* Parallax Elements */
.parallax {
  transition: transform 0.3s ease-out;
  will-change: transform;
}

/* Smooth page reveal */
body {
  opacity: 1;
  transition: opacity 0.6s ease-in;
}

body.loaded {
  opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }

  /* Mobile nav overlay (fade + blur) */
  nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;

    padding-top: 89px;

    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    transform: translateY(-8px);
    transition:
      opacity 0.45s var(--ease-out-expo),
      transform 0.45s var(--ease-out-expo),
      visibility 0s linear 0.45s;

    border-top: 1px solid rgba(0,0,0,0.06);
    z-index: 1100;
  }

  nav.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition:
      opacity 0.45s var(--ease-out-expo),
      transform 0.45s var(--ease-out-expo),
      visibility 0s;
  }

  nav ul {
    flex-direction: column;
    padding: 3rem;
    gap: 0;
  }

  nav li {
    border-bottom: 1px solid var(--gray-light);
    padding: 1.5rem 0;
  }

  nav a {
    display: block;
    font-size: 1rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero {
    padding: 140px 2rem 80px;
    min-height: 60vh;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero .subtitle {
    font-size: 0.9rem;
  }

  .hero p {
    font-size: 1rem;
  }

  section {
    padding: 80px 2rem;
  }

  .header-container {
    padding: 1.5rem 2rem;
  }

  .services-grid,
  .works-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .company-info {
    padding: 2rem;
  }

  .company-info th {
    width: 100px;
    font-size: 0.85rem;
    padding: 1.5rem 0.5rem;
  }

  .company-info td {
    padding: 1.5rem 0.5rem;
    font-size: 0.9rem;
  }

  .btn {
    padding: 0.875rem 2rem;
    font-size: 0.8rem;
  }

  .hero {
    background-attachment: scroll;
  }

  /* hero subtitle layout fix on mobile */
  .hero .subtitle-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .hero .subtitle-grid::before,
  .hero .subtitle-grid::after {
    display: none;
  }

  .hero .subtitle-left {
    padding-right: 0;
  }

  .hero .subtitle-ksr-main {
    font-size: clamp(2.2rem, 10vw, 3.0rem);
    letter-spacing: 0.25em;
  }

  .hero .subtitle-right {
    padding-left: 0;
    align-items: center;
    text-align: center;
  }

  .hero .subtitle-text {
    font-size: clamp(0.85rem, 3.5vw, 1.0rem);
    letter-spacing: 0.12em;
  }

}

/* Ultra-wide screens */
@media (min-width: 1600px) {
  .container {
    max-width: 1400px;
  }

  .hero h1 {
    font-size: 5rem;
  }

  h2 {
    font-size: 3rem;
  }
}

/* Focus styles for accessibility */
a:focus,
button:focus {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* Selection color */
::selection {
  background: var(--orange);
  color: var(--white);
}

::-moz-selection {
  background: var(--orange);
  color: var(--white);
}

/* Loading Indicator */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1s var(--ease-out-expo);
  z-index: 9999;
}

.loading.active {
  transform: scaleX(1);
}

/* Print styles */
@media print {
  header,
  footer,
  .mobile-menu-toggle {
    display: none;
  }

  body {
    color: var(--black);
    background: var(--white);
  }

  section {
    page-break-inside: avoid;
  }
}

/* =========================
   Hamburger Menu Button (smaller)
   ========================= */

.mobile-menu-toggle {
  display: none;
  width: 20px;     /* 32 -> 28 */
  height: 15px;    /* 24 -> 20 */
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1100;

  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

header.is-visible .mobile-menu-toggle {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu-toggle span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;  /* 2 -> 1.5 */
  background: var(--black);
  transition: all 0.4s var(--ease-out-expo);
}

.mobile-menu-toggle span:nth-child(1) { top: 0; }
.mobile-menu-toggle span:nth-child(2) { top: 7px; }    /* 11 -> 9 */
.mobile-menu-toggle span:nth-child(3) { bottom: 0; }

/* Active (Close icon) */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg);
  top: 7px;
}
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg);
  bottom: 7px;
}

/* Focus handling */
.mobile-menu-toggle:focus { outline: none; }
.mobile-menu-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(255, 122, 0, 0.35);
  border-radius: 6px;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
    transform: translateY(-50%); /* ★中央揃えの要 */
    z-index: 1200;
  }
}

/* --- Hamburger fade-in sync with header.is-visible --- */
.mobile-menu-toggle {
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

header.is-visible .mobile-menu-toggle {
  opacity: 1;
  transform: translateY(0);
}


body.menu-open {
  overflow: hidden;
  touch-action: none;
}

/* =========================
   Hero background: Home only
   ========================= */

.hero {
  background: var(--white);
}

.is-home .hero {
  /* background-image: url('../images/hero-bg.jpg'); */
  background-image: url('../images/hero-bg_2.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.is-home .hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.6) 0%, 
    rgba(255, 255, 255, 0.5) 50%, 
    rgba(255, 255, 255, 0.6) 100%);
  z-index: 1;
}

.hero::before {
  content: none;
}

@media (max-width: 768px) {
  .is-home .hero {
    background-attachment: scroll;
  }
}

@media (max-width: 768px) {
  .is-home nav.active {
    background: #fff !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

.logo a:focus { outline: none; }
.logo a:focus-visible {
  outline: none;
  box-shadow: none;
}

.logo a {
  -webkit-tap-highlight-color: transparent;
}

.cta-section.scroll-scale {
  opacity: 1;
  transform: none;
  transition: none;
}