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

:root {
  --primary-color: #383838ff;
  --secondary-color: #a5a5a5ff;
  --background-color: #f9fafb;
  --text-color: #1f2937;
}

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

body {
  font-family: "Noto Sans JP", sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.hero {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  padding: 6rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("assets/pattern.svg") center/cover;
  opacity: 0.1;
  pointer-events: none;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

.app-icon {
  width: 140px;
  height: 140px;
  border-radius: 28px;
  margin-bottom: 2rem;
  background-color: white;
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transform: perspective(1000px) rotateY(-15deg);
  transition: transform 0.3s ease;
}

.app-icon:hover {
  transform: perspective(1000px) rotateY(0deg);
}

.features {
  padding: 6rem 0;
  background-color: white;
  position: relative;
}

.features::before {
  content: "";
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  height: 100px;
  background: white;
  clip-path: polygon(0 50%, 100% 0, 100% 100%, 0% 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.feature-card {
  padding: 1.25rem;
  border-radius: 16px;
  background-color: var(--background-color);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  border: 1px solid rgba(0, 0, 0, 0.05);
  min-height: 120px;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
}

.feature-card h3,
.feature-card p {
  text-align: center;
  margin: 0 auto;
}

.feature-card h3 {
  color: var(--primary-color);
}

.cta-button {
  display: inline-block;
  background-color: white;
  color: var(--primary-color);
  padding: 1rem 2.5rem;
  border-radius: 9999px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.cta-button::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(45deg);
  transition: transform 0.6s;
}

.cta-button:hover::after {
  transform: rotate(45deg) translate(50%, 50%);
}

.language-switcher {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background-color: rgba(255, 255, 255, 0.9);
  padding: 0.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.language-switcher button {
  background: none;
  border: none;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  color: var(--text-color);
}

.language-switcher button.active {
  color: var(--primary-color);
  font-weight: 700;
}

@media (max-width: 768px) {
  .hero {
    padding: 4rem 0;
  }

  .features {
    padding: 4rem 0;
  }

  .app-icon {
    width: 120px;
    height: 120px;
  }

  .feature-card {
    padding: 1.5rem;
    min-height: 140px;
  }
}

.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-8 {
  margin-top: 2rem;
}

.mt-12 {
  margin-top: 3rem;
}

.solution-text {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background-color: white;
  border-radius: 16px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  line-height: 1.8;
  white-space: pre-line;
  font-size: 1.1rem;
  color: var(--text-color);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.solution-text:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .solution-text {
    padding: 1.5rem;
    font-size: 1rem;
    margin: 0 1rem;
  }
}

.solution-title {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

@media (max-width: 768px) {
  .solution-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }
}