body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f7f8fa;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

.header {
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 10;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    margin: 0;
    font-size: 1.4rem;
}

.nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

.hero {
    padding: 120px 0 80px;
    background: #ffffff;
}

.hero-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.hero-text {
    max-width: 480px;
}

.hero-text h2 {
    font-size: 2rem;
    line-height: 1.3;
}

.hero-text p {
    margin-top: 10px;
    color: #666;
}

.hero-img img {
    width: 300px;
    border-radius: 20px;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 28px;
    background: #007aff;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1rem;
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.features {
    padding: 80px 0;
}

.feature-list {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

.feature-item {
    width: 300px;
    background: #fff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.screens {
    padding: 80px 0;
}

.screens-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.screens-grid img {
    width: 180px;
    border-radius: 12px;
}

.download {
    padding: 80px 0;
    text-align: center;
}

.footer {
    text-align: center;
    padding: 30px 0;
    color: #777;
}

/* --- Language toggle (CSS only) --- */

#lang-toggle {
    display: none;
}

.ja { display: block; }
.en { display: none; }

#lang-toggle:checked ~ * .ja {
    display: none;
}
#lang-toggle:checked ~ * .en {
    display: block;
}

　/* --- Feature Section: 3 Columns --- */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 20px;
}

/* 各カード */
.feature-item {
    background: #fafafa;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #eee;
}

/* タイトル */
.feature-item h3 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* --- Responsive --- */

/* タブレット：2列 */
@media (max-width: 900px) {
    .feature-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* スマホ：1列 */
@media (max-width: 600px) {
    .feature-list {
        grid-template-columns: 1fr;
    }
}


/* ---How to use -- */
.feature2 {
  padding: 60px 20px;
  background: #eef3ff;
}

.feature-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.feature-text {
  flex: 1 1 300px;
}

.feature-text h2 {
  font-size: 28px;
  margin-bottom: 16px;
  font-weight: 700;
}

.feature-text p {
  font-size: 18px;
  line-height: 1.6;
  color: #444;
}

.feature-image {
  flex: 1 1 300px;
  text-align: center;
}

/* ★ 画像を完全レスポンシブに */
.feature-image img {
  width: 100%;
  height: auto;
  max-width: 460px;        /* ←PC時の最大幅（お好みで調整可） */
  border-radius: 22px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
  display: block;
  margin: 0 auto;
}

.phone-wrapper {
  background-color: #eef3ff;   /* ← お好きな色に変更 */
  padding: 40px;
  border-radius: 30px;
  text-align: center;
}

.phone-wrapper img {
  width: 100%;
  max-width: 380px;  /* スマホ画像のサイズ調整 */
  height: auto;
  display: block;
  margin: 0 auto;
}