@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Shippori+Mincho:wght@400;600;700&display=swap');

:root {
  --color-primary: #6B2D4B;
  --color-primary-dark: #4A1D33;
  --color-accent: #A68B5B;
  --color-accent-light: #C2A979;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F9F7F5;
  --font-base: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Sans JP', 'Shippori Mincho', serif;
  --section-padding: 80px 20px;
  --container-width: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.sp-br {
  display: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
}

.section-title {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 3rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  letter-spacing: 1px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 0 4px 15px rgba(107, 45, 75, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(107, 45, 75, 0.4);
}

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

.btn-outline:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 15px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: var(--transition);
  background-color: var(--color-primary);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header .btn-outline {
  border-color: #FFFFFF;
  color: #FFFFFF;
}

header .btn-outline:hover {
  background-color: #FFFFFF;
  color: var(--color-primary);
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 58px;
  width: auto;
}

/* Hero Section */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-size: cover;
  background-position: center;
  color: var(--color-bg);
  padding: 0 20px;
  background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('./images/heroimage.webp');
}

.hero-content {
  text-align: center;
  z-index: 2;
  max-width: 840px;
  animation: fadeUp 1s ease forwards;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.4rem;
  margin-bottom: 3rem;
  line-height: 1.2;
}

.hero h2 {
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.badge {
  background-color: rgba(166, 139, 91, 0.9);
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Proposals */
.proposals {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.proposals-grid {
  display: grid;
  grid-template-columns: repeat(2, 500px);
  justify-content: center;
  gap: 30px;
}

.proposal-card {
  background: var(--color-bg);
  padding: 40px 30px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  text-align: center;
}

.proposal-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.proposal-card img {
  height: 150px;
  margin: 0 auto 20px;
  object-fit: contain;
}

.proposal-card h3 {
  color: var(--color-primary);
  margin-bottom: 15px;
  font-size: 1.2rem;
}

/* Production Plans */
.plans {
  padding: var(--section-padding);
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.plan-card {
  border: 1px solid #EAEAEA;
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.plan-header {
  background-color: var(--color-primary);
  color: var(--color-bg);
  padding: 30px;
  text-align: center;
}

.plan-body {
  padding: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.plan-body ul {
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-body li {
  margin-bottom: 15px;
  padding-left: 25px;
  position: relative;
}

.plan-body li::before {
  content: '✓';
  color: var(--color-accent);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* Image Areas */
.image-area {
  height: 400px;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.image-area-1 {
  background-image: url('./images/oemimg_2.webp');
}

.image-area-2 {
  background-image: url('./images/oemimg_5.webp');
}

/* Case Studies */
.cases {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.case-card {
  background: var(--color-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.case-img {
  width: 100%;
  height: 250px;
  object-fit: contain;
  margin-top: 3em;
}

.case-info {
  padding: 20px;
}

.case-info h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  margin-bottom: 10px;
  text-align: center;
}

/* Process Flow */
.process {
  padding: var(--section-padding);
}

.process-steps {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  background-color: #F8E8EC;
  border-radius: 12px;
  padding: 40px 20px 20px;
  text-align: center;
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -25px;
  transform: translateY(-50%);
  border-width: 10px 0 10px 15px;
  border-style: solid;
  border-color: transparent transparent transparent #E4BAC5;
  z-index: 2;
}

.step-number {
  width: 40px;
  height: 40px;
  background-color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: bold;
  color: #FFFFFF;
  position: absolute;
  top: -15px;
  left: -15px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.step-icon {
  height: 80px;
  width: 100%;
  margin-bottom: 15px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.step-icon img {
  max-height: 100%;
  object-fit: contain;
}

.step h4 {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
}

/* Contact */
.contact {
  padding: 100px 20px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.contact h2 {
  font-family: var(--font-serif);
  margin-bottom: 20px;
  font-size: 2.5rem;
}

.contact .tel {
  font-size: 3rem;
  font-weight: 700;
  margin-top: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.tel-icon {
  height: 1em;
  width: auto;
}

/* Footer */
footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 20px 20px;
  text-align: center;
}

.footer-content {
  margin-bottom: 40px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--color-bg);
  margin-bottom: 20px;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

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

/* Responsive */
@media (max-width: 768px) {
  .section-title {
    font-size: 2.0rem;
    margin-bottom: 2rem;
  }

  header {
    justify-content: center;
  }

  header .btn {
    display: none;
  }

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

  .hero h2 {
    font-size: 1.5rem;
  }

  .hero-badges {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .process-steps {
    flex-direction: column;
    align-items: stretch;
    gap: 40px;
    padding: 0 20px;
  }

  .step:not(:last-child)::after {
    top: auto;
    bottom: -30px;
    left: 50%;
    right: auto;
    transform: translateX(-50%) rotate(90deg);
  }

  .contact h2 {
    font-size: 1.5rem;
  }

  .contact .tel {
    font-size: 2rem;
  }

  .proposals-grid {
    grid-template-columns: 1fr;
    justify-content: center;
  }

  .proposal-card {
    padding: 40px 20px;
  }

  .hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('./images/OEM_image_01.webp');
    background-attachment: scroll;
    background-size: cover;
  }

  .image-area {
    background-attachment: scroll !important;
  }

  .image-area-1 {
    background-image: url('./images/OEM_image_02.webp');
  }

  .image-area-2 {
    background-image: url('./images/OEM_image_03.webp');
  }

  .sp-br {
    display: inline;
  }
}