/* ========================================
   RECHANCE Corporate Site - Main Styles
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #599191;
  --primary-dark: #4A7A7A;
  --primary-light: #6BA3A3;
  --accent-pink: #E94B8A;
  --accent-blue: #4A90E2;
  --background: #F8F9FA;
  --text: #333333;
  --text-light: #666666;
  --white: #FFFFFF;
  --border: #E0E0E0;
  --shadow: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-h1: 48px;
  --font-size-h2: 36px;
  --font-size-h3: 28px;
  --font-size-h4: 24px;
  --line-height: 1.8;

  /* Spacing */
  --section-padding: 100px;
  --container-max-width: 1200px;
  --border-radius: 8px;
  --border-radius-small: 4px;

  /* Transitions */
  --transition: all 0.3s ease;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

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

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

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

h4 {
  font-size: var(--font-size-h4);
}

p {
  margin-bottom: 1rem;
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Section */
.section {
  padding: var(--section-padding) 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.section-title h2 {
  font-size: var(--font-size-h2);
  margin-bottom: 15px;
  color: var(--primary);
}

.section-title p {
  font-size: var(--font-size-large);
  color: var(--text-light);
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  margin: 20px auto 0;
  border-radius: 2px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--white);
  box-shadow: 0 2px 10px var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

/* Transparent Header for Home Page (top of page) */
.header.header-transparent {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  box-shadow: none;
}

.header.header-transparent .nav-link {
  color: var(--white);
}

.header.header-transparent .nav-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

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

.header.header-transparent .btn-primary:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary);
}

.header.header-transparent .dropdown-menu {
  background: var(--white);
}

.header.header-transparent .dropdown-menu a {
  color: var(--text);
}

.header.header-transparent .dropdown-menu a:hover {
  color: var(--primary);
  background: var(--background);
}

/* When scrolled, revert to white background */
.header.header-transparent.scrolled {
  background: var(--white);
  box-shadow: 0 2px 10px var(--shadow);
}

.header.header-transparent.scrolled .nav-link {
  color: var(--text);
}

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

.header.header-transparent.scrolled .btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.header.header-transparent.scrolled .btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* Mobile menu toggle for transparent header */
.header.header-transparent .menu-toggle span {
  background: var(--white);
}

.header.header-transparent.scrolled .menu-toggle span {
  background: var(--primary);
}

/* Logo style for transparent header */
.header.header-transparent .logo img {
  filter: brightness(0) invert(1);
  transition: filter 0.3s ease;
}

.header.header-transparent.scrolled .logo img {
  filter: none;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  display: block;
}

.logo img {
  height: 70px;
  width: auto;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--text);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

/* Dropdown menu */
.nav-links li {
  position: relative;
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--white);
  min-width: 320px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  padding: 10px 0;
  margin-top: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  white-space: nowrap;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 12px 20px;
  color: var(--text);
  font-weight: 500;
  transition: background 0.2s ease;
}

.dropdown-menu a:hover {
  background: var(--background);
  color: var(--primary);
}

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

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--primary);
  transition: var(--transition);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(89, 145, 145, 0.3);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(89, 145, 145, 0.3);
}

/* Hero section button style */
.hero .btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.hero .btn-outline:hover {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
  transform: none;
  box-shadow: none;
}

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

.btn-white:hover {
  background: var(--background);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.btn-large {
  padding: 18px 40px;
  font-size: var(--font-size-large);
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: 0 2px 8px var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.card-icon {
  width: 100%;
  max-width: 500px;
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 30px;
  overflow: hidden;
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-icon.pink {
  background: transparent;
}

.card-icon.blue {
  background: transparent;
}

.card-icon.primary {
  background: rgba(89, 145, 145, 0.1);
}

.card-title {
  font-size: var(--font-size-h4);
  margin-bottom: 15px;
  color: var(--text);
}

.card-subtitle {
  font-size: var(--font-size-large);
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 10px;
}

.card-description {
  color: var(--text-light);
  margin-bottom: 20px;
}

/* Grid */
.grid {
  display: grid;
  gap: 30px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.03) 0px, rgba(255, 255, 255, 0.03) 10px, transparent 10px, transparent 20px),
    linear-gradient(135deg, #599191 0%, #4A7A7A 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 40%;
  height: 100%;
  background: rgba(255, 255, 255, 0.05);
  transform: skewX(-15deg);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.15) 0%, transparent 30%),
    radial-gradient(circle at 60% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.12) 0%, transparent 35%),
    radial-gradient(ellipse at 40% 60%, rgba(74, 122, 122, 0.3) 0%, transparent 50%);
  pointer-events: none;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  width: 100%;
}

.hero-title {
  font-size: 56px;
  margin-bottom: 25px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 20px;
  margin-bottom: 40px;
  opacity: 0.95;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: var(--text);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  height: 50px;
  width: auto;
  margin-bottom: 15px;
}

.footer-section h3 {
  font-size: var(--font-size-h4);
  margin-bottom: 20px;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 10px;
  display: block;
}

.footer-section a:hover {
  color: var(--primary-light);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-small);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 15px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
}

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

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 50%;
  height: 200%;
  background: rgba(255, 255, 255, 0.05);
  transform: rotate(15deg);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: var(--font-size-h2);
  margin-bottom: 30px;
}

.cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.active {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.active {
  opacity: 1;
  transform: translateX(0);
}

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

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

.bg-primary {
  background: var(--primary);
}

.bg-light {
  background: var(--background);
}

.mb-1 {
  margin-bottom: 1rem;
}

.mb-2 {
  margin-bottom: 2rem;
}

.mb-3 {
  margin-bottom: 3rem;
}

.mt-1 {
  margin-top: 1rem;
}

.mt-2 {
  margin-top: 2rem;
}

.mt-3 {
  margin-top: 3rem;
}

/* Form Elements */
.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 2px solid var(--border);
  border-radius: var(--border-radius-small);
  transition: var(--transition);
  background: var(--white);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(89, 145, 145, 0.1);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.form-checkbox input[type="checkbox"] {
  margin-top: 5px;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-checkbox label {
  cursor: pointer;
  user-select: none;
}

/* Stats/Numbers */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item {
  padding: 20px;
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  display: block;
}

.stat-label {
  font-size: var(--font-size-base);
  color: var(--text-light);
}

/* Breadcrumb */
.breadcrumb {
  padding: 20px 0;
  background: var(--background);
}

.breadcrumb-list {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-light);
  font-size: var(--font-size-small);
}

.breadcrumb-item::after {
  content: '/';
  color: var(--text-light);
}

.breadcrumb-item:last-child::after {
  content: '';
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-item.active {
  color: var(--text);
}

/* Tags */
.tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--background);
  color: var(--text);
  border-radius: 20px;
  font-size: var(--font-size-small);
  transition: var(--transition);
}

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

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 120px 0 60px;
  margin-top: 70px;
  text-align: center;
}

.page-header h1 {
  font-size: var(--font-size-h1);
  margin-bottom: 15px;
}

.page-header p {
  font-size: var(--font-size-large);
  opacity: 0.9;
}

/* Client Logo Carousel */
.client-carousel {
  padding: 60px 0;
  background: var(--white);
  overflow: hidden;
}

.client-carousel .section-title {
  margin-bottom: 40px;
}

.client-carousel .section-title h2 {
  font-size: 24px;
  color: var(--text-light);
  font-weight: 500;
}

.client-carousel .section-title::after {
  display: none;
}

.carousel-track-wrapper {
  overflow: hidden;
  position: relative;
}

.carousel-track-wrapper::before,
.carousel-track-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}

.carousel-track-wrapper::before {
  left: 0;
  background: linear-gradient(to right, var(--white), transparent);
}

.carousel-track-wrapper::after {
  right: 0;
  background: linear-gradient(to left, var(--white), transparent);
}

.carousel-track {
  display: flex;
  gap: 60px;
  animation: scroll-logos 20s linear infinite;
}

.carousel-track:hover {
  animation-play-state: paused;
}

.client-logo {
  flex-shrink: 0;
  width: 180px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
  transition: all 0.3s ease;
}

.client-logo:hover {
  opacity: 1;
}

.client-logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Placeholder style for logos without images */
.client-logo-placeholder {
  width: 180px;
  height: 80px;
  background: var(--background);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-weight: 600;
  font-size: 14px;
}

@keyframes scroll-logos {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(calc(-180px * 5 - 60px * 5));
  }
}

@media (max-width: 768px) {
  .carousel-track {
    gap: 40px;
  }

  .client-logo {
    width: 140px;
    height: 60px;
  }

  @keyframes scroll-logos {
    0% {
      transform: translateX(0);
    }
    100% {
      transform: translateX(calc(-140px * 5 - 40px * 5));
    }
  }
}