:root {
    /* Color Palette */
    --navy: #0F2547;       /* 深海のような濃紺 */
    --gold: #A88B4D;       /* 落ち着いたゴールド */
    --light-gold: #F3EFE6; /* ゴールドのハイライト */
    --text-main: #0A192F;
    --text-sub: #0A192F;
    --white: #FFFFFF;
}

.fade-in-up,
#nav-menu,
.menu-toggle .bar {
    will-change: transform, opacity;
    backface-visibility: hidden; /* GPUでの描画を安定させる */
}

/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: 100px;}
body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-main);
    line-height: 2.0;
    background-color: var(--white);
    letter-spacing: 0.08em;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    /* --- 以下を追加 --- */
    font-display: swap; 
}
h1, h2, h3, h4, .serif { font-family: 'Noto Serif JP', serif; }

/* 英語・数字・技術的要素にRoboto Monoを適用 */
.mono, .hero-subtitle, .section-header span, .biz-num, .norm-en, .blog-date, nav a, .read-more, .btn-outline, footer p { 
    font-family: 'Roboto Mono', monospace; 
    letter-spacing: 0.1em;
}

a { text-decoration: none; color: inherit; transition: opacity 0.3s; }
a:hover { opacity: 0.7; }

/* ナビゲーション全体のレイアウト */
nav ul {
    display: flex;
    align-items: center; /* 縦方向の中央揃え */
    gap: 25px;
    list-style: none;
}


/* スマホ表示（ハンバーガーメニュー内）の調整 */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 30px;
    }
}

/* Utilities */
.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 6%;
    position: relative;
    z-index: 2;
}
.text-center { text-align: center; }
.text-vertical {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.3em;
    line-height: 2.8;
}
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.2, 1, 0.3, 1), transform 1s cubic-bezier(0.2, 1, 0.3, 1);
}
.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Background Grid (固定背景) */
.bg-hex {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(30deg, #f5f5f5 12%, transparent 12.5%, transparent 87%, #f5f5f5 87.5%, #f5f5f5),
        linear-gradient(150deg, #f5f5f5 12%, transparent 12.5%, transparent 87%, #f5f5f5 87.5%, #f5f5f5),
        linear-gradient(30deg, #f5f5f5 12%, transparent 12.5%, transparent 87%, #f5f5f5 87.5%, #f5f5f5),
        linear-gradient(150deg, #f5f5f5 12%, transparent 12.5%, transparent 87%, #f5f5f5 87.5%, #f5f5f5),
        linear-gradient(60deg, rgba(25, 50, 102, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(25, 50, 102, 0.03) 75%, rgba(25, 50, 102, 0.03));
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0;
    z-index: 0;
    pointer-events: none;
    /* --- 以下を追加 --- */
    will-change: transform;
    transform: translateZ(0);
}

/* Header */
header {
    position: fixed;
    top: 0; width: 100%;
    padding: 25px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(0,0,0,0.03);
}
/* ロゴエリア全体の調整 */
.logo {
    display: flex;
    align-items: center;
    /* 以前の before（六角形）や font 関連の設定は不要になるので削除または無視してOKです */
}

/* 画像自体のサイズ調整 */
.logo-img {
    height: 40px; /* ヘッダーの高さに合わせて調整してください */
    width: auto;  /* アスペクト比を維持 */
    display: block;
}
.logo {
    font-family: 'Noto Serif JP', serif;
    font-weight: 900;
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    color: var(--navy);
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 既存の .logo::before (六角形のアイコン) を消したい場合は以下を追加 */
.logo::before {
    display: none;
}
/*
.logo::before {
    content: '';
    width: 18px; height: 18px;
    background-color: var(--navy);
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}
*/
nav ul {
    display: flex;
    gap: 30px;
    list-style: none;
}
nav a {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-main); /* var(--navy)より一段深い #0A192F を使用 */
    position: relative;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -5px; left: 0; width: 0; height: 1px;
    background: var(--gold);
    transition: width 0.3s;
}
nav a:hover::after { width: 100%; }
/* --- ハンバーガーボタンの基本スタイル --- */
.menu-toggle {
    display: none; /* デスクトップでは隠す */
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
    z-index: 101;
}

.menu-toggle .bar {
    width: 25px;
    height: 2px;
    background-color: var(--navy);
    transition: all 0.3s ease;
}

/* --- スマホ時のレイアウト調整 --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex; /* スマホで表示 */
    }

    nav {
        position: fixed;
        top: 0;
        right: -100%; /* 初期状態は画面外 */
        width: 80%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        box-shadow: -10px 0 20px rgba(0,0,0,0.05);
        transition: 0.4s cubic-bezier(0.2, 1, 0.3, 1);
        z-index: 100;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    nav.active {
        right: 0; /* メニュー表示 */
    }

    nav ul {
        flex-direction: column; /* 縦並びに変更 */
        text-align: center;
        gap: 40px;
    }

    nav a {
        font-size: 1.3rem;   /* 視認性を高めるため少し大きく */
        font-weight: 700;   /* モバイルでは太字の方がコントラスト判定に有利です */
        color: #0A192F;    /* 変数ではなく直接指定して確実に */
    }
    

    /* ボタンが押された時のアニメーション (X印にする) */
    .menu-toggle.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}
/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-title-area {
    text-align: center;
    margin-bottom: 2rem;
}
.hero h1 {
    font-size: 3.2rem;
    font-weight: 900;
    color: var(--navy);
    margin-bottom: 1.5rem;
    line-height: 1.4;
    letter-spacing: 0.15em;
}
.hero-subtitle {
    font-size: 1rem;
    color: var(--gold);
    font-family: 'Noto Serif JP', serif;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    display: block;
}
.hero-scroll {
    position: absolute;
    bottom: 50px;
    font-size: 0.7rem;
    color: var(--navy);
    letter-spacing: 0.2em;
    opacity: 0.6;
    animation: bounce 2s infinite;
}
.hero-scroll::after {
    content: '';
    display: block;
    width: 1px; height: 60px;
    background: var(--navy);
    margin: 15px auto 0;
}

/* Section Common */
.section-header {
    text-align: center;
    margin-bottom: 5rem;
    position: relative;
}
.section-header h2 {
    font-size: 2.2rem;
    color: var(--navy);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}
.section-header span {
    font-size: 0.8rem;
    color: var(--gold);
    letter-spacing: 0.2em;
    display: block;
}
.section-line {
    width: 1px; height: 60px;
    background: var(--gold);
    margin: 30px auto 0;
}

/* Origin */
#origin {
    padding: 140px 0;
    background: var(--white);
    position: relative;
    z-index: 2;
}
.philosophy-vertical-wrapper {
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 80px;
}
.philosophy-quote {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
    border-right: 1px solid var(--gold);
    padding-right: 40px;
    margin-right: 20px;
}
.philosophy-text {
    max-width: 680px;
    margin: 0 auto;
    text-align: justify;
}
.founder-sign {
    text-align: right;
    margin-top: 3rem;
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
}

/* Vision */
#vision {
    padding: 140px 0;
    background-color: var(--navy);
    color: var(--white);
    clip-path: polygon(0 50px, 100% 0, 100% calc(100% - 50px), 0 100%);
    position: relative;
    z-index: 2;
}
#vision .section-header h2 { color: var(--white); }
.vision-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.vision-concept h3 {
    font-size: 1.8rem;
    color: var(--gold);
    margin-bottom: 2rem;
}
.vision-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 3rem;
    position: relative;
}

/* Business Section */
#business {
    padding: 140px 0;
    position: relative;
    z-index: 2;
}
.business-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
}
.business-card {
    display: flex;
    align-items: flex-start;
    gap: 50px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(15, 37, 71, 0.1);
}
.biz-num {
    font-family: 'Noto Serif JP', serif;
    font-size: 3rem;
    font-weight: 900;
    color: var(--navy);
    width: 80px;
    flex-shrink: 0;
}
.biz-content h3 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 0.5rem;
}
.biz-jp {
    display: block;
    font-size: 0.9rem;
    color: var(--gold);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: 0.2em;
}

/* Norms */
#norms {
    padding: 140px 0;
    position: relative;
    z-index: 2;
}
.norms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.norm-item {
    background: var(--white);
    padding: 50px 30px;
    text-align: center;
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}
.norm-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border-color: var(--gold);
}
.norm-en {
    display: block;
    font-family: 'Noto Serif JP', serif;
    color: var(--gold);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-style: italic;
}
.norm-jp {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 1.5rem;
}

/* Founder Section */
#founder {
    padding: 140px 0;
    position: relative;
    z-index: 2;
}
.founder-wrapper {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 60px;
    align-items: center;
}
.founder-info h3 {
    font-size: 2rem;
    color: var(--navy);
    margin-bottom: 5px;
}
.founder-info h3 span {
    font-size: 1rem;
    color: var(--gold);
    margin-left: 20px;
    font-family: 'Roboto Mono', monospace;
}
.founder-title {
    font-size: 0.9rem;
    color: var(--gold);
    font-weight: 700;
    margin-bottom: 30px;
    display: block;
}
.founder-bio p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    text-align: justify;
}
.founder-qualifications {
    list-style: none;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(15, 37, 71, 0.1);
    font-size: 0.8rem;
    color: var(--text-sub);
}
.founder-qualifications li {
    margin-bottom: 5px;
}

@media (max-width: 768px) {
    .founder-wrapper {
        flex-direction: column;
        gap: 30px;
    }
}

/* Company Section */
#company {
    padding: 140px 0;
    position: relative;
    z-index: 2;
}
.company-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border: 1px solid rgba(15, 37, 71, 0.08);
    padding: 60px;
}
.info-list {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px 0;
}
.info-list dt {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--gold);
    font-size: 0.95rem;
}
.info-list dd ul {
    list-style: none;
}
.info-list dd li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.2em;
}
.info-list dd li::before {
    content: '';
    position: absolute;
    left: 0; top: 0.7em;
    width: 6px; height: 1px;
    background: var(--gold);
}

/* Blog Section Styles */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}
.blog-card {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(15, 37, 71, 0.05);
    padding: 40px;
    transition: all 0.3s ease;
}
.blog-card:hover {
    background: var(--white);
    border-color: var(--gold);
    transform: translateY(-5px);
}
.blog-date {
    font-size: 0.8rem;
    color: var(--gold);
    margin-bottom: 15px;
    letter-spacing: 0.1em;
}
.blog-card h3 {
    font-size: 1.3rem;
    color: var(--navy);
    margin-bottom: 15px;
    line-height: 1.5;
}
.blog-card p {
    font-size: 0.95rem;
    color: var(--text-sub);
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.read-more {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 0.15em;
    border-bottom: 1px solid var(--gold);
}
.btn-outline {
    display: inline-block;
    padding: 15px 40px;
    border: 1px solid var(--navy);
    color: var(--navy);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.2em;
}

/* CTA & Footer */
.cta-section {
    padding: 100px 0;
    text-align: center;
    background: var(--light-gold);
    position: relative;
    z-index: 2;
}
.btn {
    display: inline-block;
    padding: 18px 60px;
    border: 2px solid var(--navy);
    font-weight: 700;
    transition: all 0.3s;
}
.btn:hover {
    background: var(--navy);
    color: var(--white);
}
footer {
    background-color: var(--navy);
    color: var(--white);
    padding: 80px 5%;
    text-align: center;
    border-top: 5px solid var(--gold);
    position: relative;
    z-index: 10;
}
.copyright { font-size: 0.85rem; opacity: 0.8; margin-top: 30px; }


@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-10px);}
    60% {transform: translateY(-5px);}
}

@media (max-width: 768px) {
    /* --- 既存の修正に追加 --- */
    .blog-grid {
        grid-template-columns: 1fr; /* 2カラムから1カラムへ変更 */
        gap: 20px; /* スマホでは間隔を少し狭くするとバランスが良いです */
    }
    .blog-card {
        padding: 30px 20px; /* カード内の余白もスマホ向けに微調整 */
    }
    .hero h1 { font-size: 2rem; }
    .philosophy-vertical-wrapper { height: auto; margin-bottom: 40px; }
    .text-vertical { writing-mode: horizontal-tb; border-right: none; border-left: 3px solid var(--gold); padding-left: 20px; }
    .vision-layout, .norms-grid { grid-template-columns: 1fr; }
    .business-card { flex-direction: column; gap: 20px; }
    .info-list { grid-template-columns: 1fr; gap: 10px 0; }
}

/* フォーム全体のコンテナ */
.contact-form {
    max-width: 600px;
    margin: 40px auto 0;
    text-align: left;
}

/* 入力グループの余白 */
.form-group {
    margin-bottom: 24px;
}

/* 入力欄（input, textarea）のスタイル */
/* id指定ではなく要素セレクタで確実に当てます */
.contact-form input, 
.contact-form textarea {
    width: 100%;
    padding: 16px;
    border: 1px solid rgba(15, 37, 71, 0.2) !important; /* ネイビーの透過 */
    background: rgba(255, 255, 255, 0.5) !important;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.95rem;
    color: var(--navy);
    outline: none;
    transition: all 0.3s ease;
    border-radius: 0 !important; /* 既存の丸みをリセット */
    display: block;
}

/* フォーカス時の挙動 */
.contact-form input:focus, 
.contact-form textarea:focus {
    border-color: var(--gold) !important;
    background: var(--white) !important;
    box-shadow: 0 4px 12px rgba(168, 139, 77, 0.1);
}

/* 送信ボタン（既存の .btn を上書き） */
#submit-btn {
    width: 100%;
    display: block;
    margin-top: 20px;
    padding: 18px;
    background-color: transparent;
    color: var(--navy);
    border: 2px solid var(--navy);
    font-family: 'Noto Serif JP', serif;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: all 0.3s;
}

#submit-btn:hover {
    background-color: var(--navy);
    color: var(--white);
}

/* 送信状態メッセージ */
#form-status {
    margin-top: 15px;
    font-size: 0.85rem;
    font-family: 'Noto Serif JP', serif;
    color: var(--gold);
    text-align: center;
}