@charset "utf-8";

/* ==========================================================================
   基本設定
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: #333;
    line-height: 1.8;
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
}

/* 見出しに明朝体を適用 */
h1, h2, h3, .logo {
    font-family: 'Shippori Mincho', serif;
    letter-spacing: 0.05em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    vertical-align: bottom;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   ヘッダー（ナビゲーション）
   ========================================================================== */
header {
    width: 100%;
    height: 90px;
    background: rgba(255, 255, 255, 0.98);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo a {
    font-size: 26px;
    font-weight: 700;
    color: #1a2a44; /* 深紺 */
}

.gnav ul {
    display: flex;
    align-items: center;
}

.gnav ul li {
    margin-left: 25px;
}

.gnav ul li a {
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
}

.gnav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: #c4a006; /* 金色 */
    transition: width 0.3s;
}

.gnav ul li a:hover::after {
    width: 100%;
}

.btn-contact {
    background: #1a2a44;
    color: #fff !important;
    padding: 12px 25px !important;
    border-radius: 2px;
}

.btn-contact:hover {
    background: #c4a006 !important;
}

/* ==========================================================================
   メインビジュアル
   ========================================================================== */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(rgba(26, 42, 68, 0.4), rgba(26, 42, 68, 0.4)), 
                url('https://images.unsplash.com/photo-1528127269322-539801943592?auto=format&fit=crop&q=80&w=2000') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
    padding-top: 90px;
}

.hero-text .sub-copy {
    font-family: 'Shippori Mincho', serif;
    font-size: 22px;
    letter-spacing: 0.6em;
    display: block;
    margin-bottom: 30px;
    text-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.hero-text h1 {
    font-size: 72px;
    margin-bottom: 25px;
    letter-spacing: 0.15em;
    font-weight: 700;
    text-shadow: 0 0 15px rgba(0,0,0,0.5);
}

.hero-text p {
    font-size: 18px;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   共通セクション
   ========================================================================== */
.section {
    padding: 120px 0;
}

.bg-light {
    background-color: #f9f7f2; /* 勾玉会のような上品な生成り色 */
}

.section-title {
    text-align: center;
    font-size: 34px;
    margin-bottom: 70px;
    color: #1a2a44;
}

.section-title span {
    display: block;
    font-size: 14px;
    color: #c4a006;
    letter-spacing: 0.3em;
    margin-top: 10px;
    font-family: 'Noto Sans JP', sans-serif;
}

/* ==========================================================================
   各コンテンツ
   ========================================================================== */

/* 概要 */
.content-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.content-box p {
    margin-bottom: 2em;
    font-size: 17px;
}

/* 設立の趣旨（グリッド） */
.purpose-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.purpose-item {
    background: #fff;
    padding: 50px 30px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.03);
    text-align: center;
    border-top: 5px solid #c4a006;
    transition: transform 0.3s ease;
}

.purpose-item:hover {
    transform: translateY(-10px);
}

.purpose-item h3 {
    margin-bottom: 25px;
    color: #1a2a44;
    font-size: 20px;
}

.purpose-item p {
    font-size: 15px;
    color: #666;
}

/* お問い合わせフォーム */
.contact-form {
    max-width: 750px;
    margin: 0 auto;
    background: #fff;
    padding: 60px;
    border: 1px solid #eee;
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 15px;
}

.form-group label span {
    color: #d93333;
    font-size: 11px;
    margin-left: 10px;
    background: #ffeeee;
    padding: 2px 6px;
    border-radius: 2px;
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 0; /* シャープな印象に */
    font-size: 16px;
    background: #fafafa;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: #c4a006;
    background: #fff;
}

.submit-btn {
    display: block;
    width: 260px;
    margin: 50px auto 0;
    padding: 18px;
    background: #c4a006;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 18px;
    font-family: 'Shippori Mincho', serif;
    transition: 0.3s;
}

.submit-btn:hover {
    background: #1a2a44;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   フッター
   ========================================================================== */
footer {
    background: #1a2a44;
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.copyright {
    font-size: 13px;
    letter-spacing: 0.1em;
    opacity: 0.7;
}

/* ==========================================================================
   レスポンシブ
   ========================================================================== */
@media (max-width: 992px) {
    .purpose-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    header { height: 70px; }
    .logo a { font-size: 20px; }
    .gnav { display: none; } /* モバイル時は非表示（必要に応じてハンバーガーを実装） */
    
    .hero-text h1 { font-size: 42px; }
    .hero-text .sub-copy { font-size: 16px; letter-spacing: 0.3em; }
    
    .section { padding: 80px 0; }
    .contact-form { padding: 30px 20px; }
}