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

:root {
    --primary-color: #FF4D00;      /* メインオレンジ */
    --primary-dark: #E65528;       /* ダークオレンジ */
    --text-primary: #333333;       /* メインテキスト */
    --text-secondary: #666666;     /* サブテキスト */
    --text-light: #999999;         /* ライトテキスト */
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-gray: #E9ECEF;
    --border-color: #DEE2E6;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-primary);
    line-height: 1.8;
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   ヘッダー
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    cursor: pointer;
}

.logo img {
    height: 70px;
    display: block;
}

.logo h1 {
    font-size: 14px;
    font-weight: 200;
    color: var(--bg-white);
    margin: 0;
}

/* ナビゲーション */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--bg-white);
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--bg-white);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
}

.nav-menu li a:hover {
    color: var(--text-primary);
    opacity: 0.8;
}

/* ========================================
   ヒーローセクション
======================================== */
.hero {
    margin-top: 64px;
    padding: 100px 0;
    background-image: url('../images/fv_background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
    position: relative;
}

/* 背景画像のオーバーレイ（一時的に無効化）*/
/*
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    z-index: 0;
}
*/

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.4;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 30px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
}

/* ========================================
   共通セクションスタイル
======================================== */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 10px;
}

.section-title-en {
    font-size: 14px;
    color: var(--primary-color);
    text-align: center;
    font-weight: 500;
    margin-bottom: 60px;
    letter-spacing: 0.1em;
}

/* ========================================
   企業理念・ビジョンセクション
======================================== */
.vision-section {
    background-color: var(--bg-white);
}

.vision-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.vision-item {
    padding: 40px;
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
}

.vision-item-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.vision-item-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
}

/* ========================================
   事業内容セクション
======================================== */
.business-section {
    background-color: var(--bg-light);
}

.business-description {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.business-items {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.business-item {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.business-item-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--bg-gray);
    text-align: center;
}

.business-item-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   会社概要セクション
======================================== */
.company-section {
    background-color: var(--bg-white);
}

.company-table {
    max-width: 900px;
    margin: 0 auto;
}

.company-table table {
    width: 100%;
    border-collapse: collapse;
}

.company-table th,
.company-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.company-table th {
    background-color: var(--bg-light);
    font-weight: 700;
    color: var(--text-primary);
    width: 200px;
    font-size: 15px;
}

.company-table td {
    color: var(--text-secondary);
    font-size: 15px;
}

.company-table td a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.company-table td a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ========================================
   お問い合わせセクション
======================================== */
.contact-section {
    background-color: var(--bg-light);
}

.contact-description {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-item {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    display: flex;
    gap: 20px;
}

.contact-item-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    border-radius: 50%;
    color: var(--bg-white);
}

.contact-item-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item-content {
    flex: 1;
}

.contact-item-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.contact-item-text {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 5px;
}

.contact-item-text a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item-text a:hover {
    color: var(--primary-dark);
}

.contact-item-note {
    font-size: 14px;
    color: var(--text-light);
}

/* ========================================
   フッター
======================================== */
.footer {
    background-color: var(--text-primary);
    color: var(--bg-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-address {
    font-size: 14px;
    color: var(--bg-gray);
    line-height: 1.8;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.footer-nav a {
    color: var(--bg-white);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    font-size: 13px;
    color: var(--bg-gray);
}

/* ========================================
   レスポンシブデザイン
======================================== */

/* タブレット */
@media (max-width: 768px) {
    /* ナビゲーション */
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    /* メニューオーバーレイ */
    .nav::before {
        content: '';
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        height: calc(100vh - 64px);
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 999;
    }

    .nav.active::before {
        opacity: 1;
        visibility: visible;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        right: -100%;
        width: 100%;
        max-width: 320px;
        height: calc(100vh - 64px);
        background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
        flex-direction: column;
        padding: 0;
        gap: 0;
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        padding: 0;
        border-bottom: 1px solid var(--border-color);
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .nav-menu.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-menu.active li:nth-child(1) { transition-delay: 0.1s; }
    .nav-menu.active li:nth-child(2) { transition-delay: 0.15s; }
    .nav-menu.active li:nth-child(3) { transition-delay: 0.2s; }
    .nav-menu.active li:nth-child(4) { transition-delay: 0.25s; }

    .nav-menu li:first-child {
        margin-top: 20px;
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu li a {
        display: block;
        padding: 20px 24px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-primary);
        position: relative;
        transition: all 0.3s ease;
    }

    .nav-menu li a::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        width: 4px;
        background-color: var(--primary-color);
        transform: scaleY(0);
        transition: transform 0.3s ease;
    }

    .nav-menu li a:hover,
    .nav-menu li a:active {
        background-color: rgba(255, 77, 0, 0.05);
        color: var(--primary-color);
        padding-left: 32px;
    }

    .nav-menu li a:hover::before,
    .nav-menu li a:active::before {
        transform: scaleY(1);
    }

    /* ヒーローセクション */
    .hero {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    /* セクション */
    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    /* 企業理念・ビジョン */
    .vision-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .vision-item {
        padding: 30px;
    }

    /* 事業内容 */
    .business-items {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 会社概要 */
    .company-table th {
        width: 120px;
        font-size: 14px;
    }

    .company-table td {
        font-size: 14px;
    }

    /* お問い合わせ */
    .contact-info {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* フッター */
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 15px;
    }
}

/* モバイル */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .header-content {
        padding: 10px 0;
    }

    .logo img {
        height: 32px;
    }

    .logo h1 {
        font-size: 14px;
    }

    .hero {
        margin-top: 52px;
        padding: 40px 0;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .hero-description {
        font-size: 14px;
    }

    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 24px;
    }

    .section-title-en {
        margin-bottom: 40px;
    }

    .vision-item {
        padding: 25px;
    }

    .vision-item-title {
        font-size: 20px;
    }

    .business-item {
        padding: 30px 20px;
    }

    .company-table th,
    .company-table td {
        padding: 15px;
        font-size: 13px;
    }

    .company-table th {
        width: 100px;
    }

    .contact-item {
        padding: 30px 20px;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer {
        padding: 40px 0 20px;
    }
}

/* PC用のみ表示 */
.pc-only {
    display: inline;
}

@media (max-width: 768px) {
    .pc-only {
        display: none;
    }
}