/* -----------------------------------------------------------------
  Reset & Base Styles
----------------------------------------------------------------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; } /* 横スクロール防止 */
body {
    font-family: 'Noto Sans JP', sans-serif;
    color: #333333;
    line-height: 1.8;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    word-break: break-word; /* 長い英単語の折り返し */
}
a { color: inherit; text-decoration: none; transition: 0.3s ease; }
a:hover { opacity: 0.8; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; } /* 画像のレスポンシブ化 */

/* -----------------------------------------------------------------
  Layout & Utilities (Responsive-first)
----------------------------------------------------------------- */
.section-container {
    /* スマホ・タブレット・PCで余白を自動調整 */
    padding: clamp(60px, 10vw, 120px) 5%;
}

.bg-light { background-color: #f8f9fa; }
.bg-dark { background-color: #0f1e36; }
.text-white { color: #ffffff; }
.text-gold { color: #c5a880; }
.text-gray { color: #a0aec0; }
.text-center { text-align: center; }

/* 共通セクションヘッダー */
.section-header { margin-bottom: clamp(40px, 8vw, 80px); }
.section-header .en-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(0.75rem, 2vw, 0.9rem);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #c5a880;
    margin-bottom: 8px;
}
.section-header h2 {
    /* PCでは2.2rem、スマホでは1.8remになるように調整 */
    font-size: clamp(1.6rem, 5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: 0.05em;
    line-height: 1.4;
}

/* グリッドシステム（基本1カラム） */
.grid-container {
    display: grid;
    gap: 30px;
}

/* 💻 PC・タブレット向けのグリッド調整 */
@media (min-width: 600px) {
    .grid-container { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
    .grid-container.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
}

/* -----------------------------------------------------------------
  Header (📱スマホ対応ナビ)
----------------------------------------------------------------- */
.site-header {
    position: sticky; top: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    z-index: 100;
}
.header-container {
    display: flex; justify-content: space-between; align-items: center;
    max-width: 1300px; margin: 0 auto; padding: 15px 5%;
}
.site-logo .logo-en { font-family: 'Playfair Display', serif; font-size: 1.3rem; color: #0f1e36; }
.site-logo .logo-ja { font-size: 0.7rem; color: #718096; }

/* 📱 スマホ時はナビを隠す（ハンバーガーメニュー等は今回は実装せず、簡易対応） */
.site-nav {
    display: none; /* 初期状態は非表示 */
}

/* 💻 タブレット・PCではナビを表示 */
@media (min-width: 768px) {
    .site-nav { display: block; }
    .site-nav ul { display: flex; align-items: center; gap: 20px; }
    .site-nav a { font-size: clamp(0.8rem, 1vw, 0.95rem); }
    .btn-nav { background-color: #c5a880; color: #fff !important; padding: 6px 15px; border-radius: 4px; }
}

/* -----------------------------------------------------------------
  Hero Section
----------------------------------------------------------------- */
.hero-section {
    background: linear-gradient(135deg, #0f1e36 0%, #1a365d 100%);
    color: #fff;
    /* PCでは広く、スマホではコンパクトに */
    padding: clamp(100px, 15vw, 180px) 5% clamp(60px, 10vw, 120px);
    text-align: left;
}
.hero-content { max-width: 800px; margin: 0 auto; }
.hero-sub { color: #c5a880; font-size: clamp(0.9rem, 2vw, 1.1rem); display: block; margin-bottom: 15px; }
.hero-title {
    /* PCでは3rem、スマホでは2remに */
    font-size: clamp(1.8rem, 8vw, 3rem);
    font-weight: 700; line-height: 1.3; margin-bottom: 25px;
}
.hero-desc { font-size: clamp(0.95rem, 2vw, 1.05rem); color: #e2e8f0; margin-bottom: clamp(30px, 6vw, 50px); max-width: 650px; }

/* 📱 スマホではボタンを中央寄せにしても良いが、今回は左寄せのままレスポンシブ化 */
.btn-primary {
    display: inline-block; background-color: #c5a880; color: #fff;
    padding: clamp(12px, 3vw, 15px) clamp(25px, 6vw, 40px);
    font-weight: 500; border-radius: 4px; font-size: clamp(0.95rem, 2vw, 1.05rem);
    box-shadow: 0 4px 15px rgba(197, 168, 128, 0.3);
}

/* 📱 スマホでのテキストの折り返しを最適化 */
@media (max-width: 600px) {
    .hero-title br { display: none; } /* brタグを無効化 */
}

/* -----------------------------------------------------------------
  Components
----------------------------------------------------------------- */
/* Strengths Cards */
.card {
    background: #ffffff; padding: clamp(25px, 5vw, 40px);
    border-radius: 8px; box-shadow: 0 5px 20px rgba(0,0,0,0.04);
    border-top: 4px solid #c5a880;
    transition: transform 0.3s ease;
}
.card:hover { transform: translateY(-5px); }
.card-icon { font-size: 2.2rem; margin-bottom: 15px; }
.card h3 { font-size: 1.2rem; margin-bottom: 12px; }
.card p { font-size: 0.95rem; color: #666; }

/* Service Boxes */
.service-box {
    background: #ffffff; padding: 25px; border-radius: 6px;
    border: 1px solid #e2e8f0;
}
.service-box h4 { font-size: 1.1rem; margin-bottom: 12px; }
.service-box p { font-size: 0.9rem; color: #666; }

/* News List */
.news-list li {
    padding: 18px 0; border-bottom: 1px solid #eee;
    display: flex; flex-wrap: wrap; align-items: center; gap: 15px;
}
.news-date { color: #718096; font-size: 0.85rem; }
.news-category { background: #e2e8f0; font-size: 0.7rem; padding: 2px 6px; border-radius: 3px; }
.news-title { font-size: 0.95rem; flex: 1; min-width: 250px; } /* スマホでの折り返し調整 */

/* -----------------------------------------------------------------
  Contact Form
----------------------------------------------------------------- */
.contact-form {
    max-width: 650px; margin: 30px auto 0; background: #ffffff;
    /* スマホではパディングを小さく */
    padding: clamp(25px, 5vw, 40px);
    border-radius: 8px;
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 0.9rem; }
.form-group .required { background: #e53e3e; color: #fff; font-size: 0.65rem; padding: 1px 5px; border-radius: 3px; vertical-align: middle; margin-left: 5px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px; border: 1px solid #cbd5e0;
    border-radius: 4px; font-family: inherit; font-size: 0.95rem;
}
.btn-submit {
    width: 100%; background-color: #0f1e36; color: #fff;
    border: none; padding: 15px; font-size: 1rem; font-weight: 500;
    border-radius: 4px; cursor: pointer;
}

/* -----------------------------------------------------------------
  Footer
----------------------------------------------------------------- */
.site-footer {
    background-color: #0a1424; color: #718096; text-align: center;
    padding: 30px 5%; font-size: 0.8rem;
}