/* ===== リセット・基本スタイル ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #0891b2;
    --accent-color: #f59e0b;

    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;

    --bg-white: #ffffff;
    --bg-gray-50: #f9fafb;
    --bg-gray-100: #f3f4f6;
    --bg-gray-900: #111827;

    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* タイポグラフィ */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* スペーシング */
    --header-height: 4.5rem;
    --section-padding: 5rem 0;
    --container-width: 1200px;

    /* トランジション */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

/* ===== 再利用可能なクラス ===== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: var(--section-padding);
}

.section__header {
    text-align: center;
    margin-bottom: 3rem;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.button {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.button--primary {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.button--primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.button--block {
    width: 100%;
}

/* ===== ヘッダー・ナビゲーション ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 100;
    transition: var(--transition);
}

.nav {
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    height: var(--header-height);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-image {
    max-height: 45px;
    height: auto;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
}

.nav__menu {
    display: flex;
    align-items: center;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav__link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav__link:hover::after,
.nav__link.active-link::after {
    width: 100%;
}

.nav__link:hover,
.nav__link.active-link {
    color: var(--primary-color);
}

.nav__toggle,
.nav__close {
    display: none;
}

/* ===== ヒーローセクション ===== */
.home {
    padding-top: calc(var(--header-height) + 3rem);
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
}

.home__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.home__data {
    max-width: 600px;
}

.home__title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.home__title-accent {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.home__description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.home__image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.home__blob {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation: blob-animation 8s ease-in-out infinite;
    opacity: 0.15;
}

@keyframes blob-animation {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    50% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
}

/* ===== サービスセクション ===== */
.services {
    background-color: var(--bg-white);
}

.services__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service__card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.service__card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    height: 100%;
}

.service__card-link:hover .service__card {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.service__card--featured {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    border-color: var(--primary-color);
}

.service__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-color);
    color: var(--bg-white);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.service__icon-box {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service__icon {
    width: 2rem;
    height: 2rem;
    color: var(--bg-white);
}

.service__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.service__description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service__features {
    list-style: none;
    padding-left: 0;
}

.service__features li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.service__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.service__link {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.service__card-link:hover .service__link {
    color: var(--primary-dark);
    transform: translateX(4px);
}

/* ===== 特徴セクション ===== */
.features {
    background-color: var(--bg-gray-50);
}

.features__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature__item {
    text-align: center;
    padding: 2rem;
}

.feature__number {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.feature__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.feature__text {
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.about__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about__heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.about__text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about__table {
    width: 100%;
    border-collapse: collapse;
}

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

.about__table th {
    background-color: var(--bg-gray-50);
    color: var(--text-primary);
    font-weight: 600;
    width: 35%;
}

.about__table td {
    color: var(--text-secondary);
}

/* ===== お問い合わせセクション ===== */
.contact {
    background-color: var(--bg-gray-50);
}

.contact__container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
}

.contact__heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact__text {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact__detail {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.contact__icon {
    width: 2rem;
    height: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact__detail h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.contact__detail p {
    color: var(--text-secondary);
}

/* フォームスタイル */
.contact__form {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.form__group {
    margin-bottom: 1.5rem;
}

.form__label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.required {
    color: #ef4444;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== フッター ===== */
.footer {
    background-color: var(--bg-gray-900);
    color: var(--bg-gray-100);
    padding: 3rem 0 1rem;
}

.footer__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer__logo {
    display: inline-block;
}

.footer__logo .logo-text {
    -webkit-text-fill-color: var(--bg-white);
}

.footer__logo .logo-image {
    max-height: 40px;
    height: auto;
    width: auto;
    max-width: 180px;
    object-fit: contain;
}

.footer__description {
    color: var(--text-light);
    margin-top: 1rem;
    line-height: 1.7;
}

.footer__title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--bg-white);
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: 0.75rem;
}

.footer__links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer__links a:hover {
    color: var(--primary-light);
}

.footer__copy {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer__copy p {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===== トップに戻るボタン ===== */
.scrolltop {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-color);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 99;
}

.scrolltop.show {
    opacity: 1;
    visibility: visible;
}

.scrolltop:hover {
    background-color: var(--primary-dark);
    transform: translateY(-4px);
}

.scrolltop svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--bg-white);
}

/* ===== レスポンシブデザイン ===== */
@media screen and (max-width: 968px) {
    :root {
        --section-padding: 3.5rem 0;
    }

    .section__title {
        font-size: 2rem;
    }

    .home__container,
    .about__container,
    .contact__container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .home__title {
        font-size: 2.5rem;
    }

    .home__blob {
        width: 300px;
        height: 300px;
    }

    .services__container {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .logo-image {
        max-height: 35px;
        max-width: 150px;
    }

    .footer__logo .logo-image {
        max-height: 30px;
        max-width: 140px;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--bg-white);
        box-shadow: var(--shadow-xl);
        padding: 4rem 2rem;
        transition: var(--transition);
    }

    .nav__menu.show-menu {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav__close,
    .nav__toggle {
        display: block;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--text-primary);
    }

    .nav__close {
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
    }

    .home {
        padding-top: calc(var(--header-height) + 2rem);
    }

    .home__title {
        font-size: 2rem;
    }

    .features__container {
        grid-template-columns: 1fr;
    }

    .about__container,
    .contact__container {
        grid-template-columns: 1fr;
    }

    .footer__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .logo-image {
        max-height: 30px;
        max-width: 120px;
    }

    .footer__logo .logo-image {
        max-height: 25px;
        max-width: 110px;
    }

    .home__title {
        font-size: 1.75rem;
    }

    .section__title {
        font-size: 1.75rem;
    }

    .service__card {
        padding: 1.5rem;
    }
}

/* ===== 共通コンポーネント（全ページで使用） ===== */

/* パンくずナビゲーション */
.breadcrumb {
    background-color: var(--bg-gray-50);
    padding: 1rem 0;
    margin-top: var(--header-height);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.breadcrumb__separator {
    margin: 0 0.5rem;
    color: var(--text-light);
}

.breadcrumb__current {
    color: var(--text-primary);
    font-weight: 500;
}

/* ページヒーローセクション（共通ベース） */
.page-hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    padding: 5rem 0 4rem;
    text-align: center;
}

.page-hero--compact {
    padding: 4rem 0 3rem;
}

.page-hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.page-hero__subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.page-hero__text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* カード共通スタイル */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card__icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.card__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.card__text {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* レスポンシブ対応: 共通コンポーネント */
@media screen and (max-width: 768px) {
    .page-hero__title {
        font-size: 2.5rem;
    }

    .page-hero__subtitle {
        font-size: 1.125rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }
}