/* YWS GLOBAL GROUP - Corporate Website Styles */

:root {
  /* Color Palette */
  --color-off-white: #F8F7F4;
  --color-primary: #2C3E50;
  --color-accent: #34495E;
  --color-text-dark: #1A1A1A;
  --color-text-light: #666666;
  --color-border: #E0DFD9;
  
  /* Typography - Optimized for single line display */
  --font-primary: 'Noto Sans JP', 'Noto Sans TC', 'Roboto', sans-serif;
  --font-size-hero: clamp(1.75rem, 4vw, 2.5rem);
  --font-size-h1: clamp(1.5rem, 3vw, 2rem);
  --font-size-h2: clamp(1.25rem, 2.5vw, 1.75rem);
  --font-size-h3: clamp(1.1rem, 2vw, 1.35rem);
  --font-size-body: 1rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 140px;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-body);
  line-height: 1.7;
  color: var(--color-text-dark);
  background-color: var(--color-off-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  -webkit-tap-highlight-color: rgba(44, 62, 80, 0.1);
}

ul {
  list-style: none;
}

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

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(248, 247, 244, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: all 0.3s ease;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo img,
.logo-original {
  height: 120px;
  width: auto;
  display: block;
}

/* Remove white background using CSS filters */
.logo-original {
  filter: 
    brightness(1.1)
    contrast(1.2);
  background: transparent;
  mix-blend-mode: darken;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-menu a {
  padding: var(--spacing-xs) 1rem;
  color: var(--color-text-dark);
  font-weight: 500;
  position: relative;
  font-size: 0.9rem;
  white-space: nowrap;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 80%;
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
  margin-left: 1.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--color-border);
}

.lang-switcher button {
  padding: 0.4rem 0.8rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.lang-switcher button.active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.lang-switcher button:hover:not(.active) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(135deg, rgba(44, 62, 80, 0.4) 0%, rgba(52, 73, 94, 0.3) 100%), 
              url('../images/hero-bg.jpg') center/cover no-repeat;
  background-attachment: fixed;
  margin-top: var(--header-height);
  position: relative;
  overflow: hidden;
  animation: heroFadeIn 1s ease-out;
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: slideUpFadeIn 1s ease-out 0.3s both;
}

.hero-content h1 {
  font-size: var(--font-size-hero);
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
}

.hero-content p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUpFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  text-align: center;
  position: relative;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(44, 62, 80, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-accent);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(44, 62, 80, 0.3);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.98);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 20px rgba(44, 62, 80, 0.2);
}

/* Section Styles */
.section {
  padding: var(--spacing-xl) 0;
  opacity: 0;
  animation: sectionFadeIn 0.8s ease-out forwards;
}

@keyframes sectionFadeIn {
  to {
    opacity: 1;
  }
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-md);
  opacity: 0;
  animation: slideDown 0.8s ease-out 0.2s forwards;
  white-space: nowrap;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60px;
  height: 3px;
  background-color: var(--color-primary);
  animation: lineExpand 0.6s ease-out 0.5s forwards;
}

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

@keyframes lineExpand {
  to {
    transform: translateX(-50%) scaleX(1);
  }
}

.section-description {
  text-align: center;
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.1rem;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(30px);
  animation: cardFadeInUp 0.6s ease-out forwards;
  position: relative;
  overflow: hidden;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(44, 62, 80, 0.05), transparent);
  transition: left 0.5s;
}

.card:hover::before {
  left: 100%;
}

.card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.card-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  animation: iconFloat 3s ease-in-out infinite;
}

.card:hover .card-icon {
  animation: iconBounce 0.6s ease;
  color: var(--color-accent);
}

.card h3 {
  font-size: var(--font-size-h3);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  transition: color 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card:hover h3 {
  color: var(--color-accent);
}

.card p {
  color: var(--color-text-light);
  line-height: 1.7;
}

@keyframes cardFadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes iconFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes iconBounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.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: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}

/* Form Styles */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
  background-color: white;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --header-height: 120px;
    --font-size-hero: clamp(1.3rem, 5vw, 1.6rem);
    --font-size-h1: clamp(1.2rem, 4vw, 1.5rem);
    --font-size-h2: clamp(1.1rem, 3.5vw, 1.35rem);
    --font-size-h3: clamp(1rem, 3vw, 1.2rem);
  }
  
  body {
    font-size: 0.95rem;
  }
  
  .logo {
    font-size: clamp(0.85rem, 2.5vw, 1rem);
  }
  
  .logo img,
  .logo-original {
    height: 96px;
    display: block;
  }
  
  .nav-menu a {
    font-size: 0.95rem;
  }
  
  .lang-switcher {
    gap: 0.5rem;
  }
  
  .hero-content h1 {
    white-space: normal;
    line-height: 1.4;
  }
  
  .section-title {
    white-space: normal;
    line-height: 1.4;
  }
  
  .card h3 {
    white-space: normal;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-off-white);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--spacing-lg);
    transition: left 0.3s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .lang-switcher {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: var(--spacing-md);
    margin-left: 0;
    margin-top: var(--spacing-md);
  }
  
  .menu-toggle {
    display: flex;
    touch-action: manipulation;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    min-height: calc(100vh - var(--header-height));
    padding: var(--spacing-lg) var(--spacing-md);
    background-attachment: scroll;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  /* Mobile-specific improvements */
  .btn {
    padding: 0.9rem 2rem;
    font-size: 0.95rem;
  }
  
  /* Improve touch targets */
  .nav-menu a,
  .lang-switcher button {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

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

.fade-in {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Additional Animations */
.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  animation: slideInLeft 0.8s ease-out forwards;
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  animation: slideInRight 0.8s ease-out forwards;
}

@keyframes slideInLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Parallax & Scroll Effects */
.parallax-bg {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

/* Image Cards with Overlay */
.image-card {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  height: 300px;
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-card:hover img {
  transform: scale(1.1);
}

.image-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(44, 62, 80, 0.9), transparent);
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.image-card:hover .image-card-overlay {
  transform: translateY(0);
}

.image-card-overlay h3 {
  color: white;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-h3);
}

.image-card-overlay p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

/* Loading Animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Smooth Page Transitions */
@keyframes pageLoad {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body {
  animation: pageLoad 0.5s ease-out;
}

/* Header Animation on Scroll */
.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  background-color: rgba(248, 247, 244, 0.98);
}

/* CTA Section Enhancement */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}