/* ================================================
   基本スタイル - 海・サーフカルチャーテーマ
================================================ */
:root {
    /* カラーパレット - 海・ビーチテーマ */
    --color-primary: #4ECDC4;
    --color-primary-dark: #3AAFA9;
    --color-secondary: #FFE66D;
    --color-accent: #FF6B6B;
    --color-ocean: #2B7A78;
    --color-sand: #F4E4C1;
    --color-wood: #8B6F47;
    --color-bg: #FAFAFA;
    --color-bg-dark: #17252A;
    --color-text: #2B2D42;
    --color-text-light: #6C757D;
    --color-white: #FFFFFF;
    --color-border: #DEE2E6;
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-display: 'Playfair Display', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* ボーダー */
    --border-radius: 12px;
    --border-radius-lg: 24px;
    
    /* トランジション */
    --transition: all 0.3s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    
    /* z-index */
    --z-header: 100;
    --z-modal: 1000;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ================================================
   共通スタイル
================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section__title {
    font-family: var(--font-display);
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-ocean);
    letter-spacing: 0.05em;
    position: relative;
}

.section__title::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* ================================================
   ヘッダー / ナビゲーション
================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-header);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scroll-header {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-ocean);
    font-weight: 700;
}

.nav__logo i {
    font-size: 1.8rem;
    color: var(--color-primary);
}

.nav__list {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav__link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.nav__link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--color-primary);
    transition: var(--transition);
    border-radius: 2px;
}

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

.nav__link:hover::before {
    width: 80%;
}

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

.nav__toggle,
.nav__close {
    display: none;
}

/* ================================================
   ヒーローセクション
================================================ */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 80px;
}

.hero__image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.4) 0%, rgba(43, 122, 120, 0.6) 100%);
    z-index: 2;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(23, 37, 42, 0.3) 100%);
    z-index: 3;
}

.hero__content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-md);
}

.hero__title {
    font-family: var(--font-display);
    font-size: 5.5rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease-out;
}

.hero__subtitle {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
    animation: fadeInUp 1s ease-out 0.2s both;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    font-weight: 400;
}

.hero__description {
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease-out 0.4s both;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero__button {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.hero__button.primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-ocean));
    color: var(--color-white);
}

.hero__button.secondary {
    background: var(--color-white);
    color: var(--color-ocean);
    border: 2px solid var(--color-white);
}

.hero__button:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--color-white);
    animation: bounce 2s infinite;
    z-index: 10;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-15px);
    }
    60% {
        transform: translateX(-50%) translateY(-8px);
    }
}

/* ================================================
   Aboutセクション
================================================ */
.about {
    background: var(--color-white);
}

.about__container {
    display: grid;
    gap: var(--spacing-lg);
}

.about__content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.about__subtitle {
    font-size: 2rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.about__text {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    line-height: 2;
}

.about__features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature__card {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.feature__card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.feature__icon {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.feature__title {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.feature__description {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* ================================================
   メニューセクション
================================================ */
.menu {
    background: var(--color-bg);
}

.menu__tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.menu__tab {
    padding: 1rem 2rem;
    background: var(--color-white);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.menu__tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.menu__tab.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-ocean));
    color: var(--color-white);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.menu__content {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.menu__content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.menu__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.menu__subtitle {
    font-size: 2rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.menu__badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: var(--color-text);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.menu__price-tag {
    font-size: 1.5rem;
    color: var(--color-ocean);
    font-weight: 700;
}

.menu__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.menu__item {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.menu__item:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.menu__item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.menu__item-name {
    font-size: 1.1rem;
    color: var(--color-text);
    flex: 1;
    font-weight: 600;
}

.menu__item-price {
    font-size: 1.3rem;
    color: var(--color-primary);
    font-weight: 700;
    white-space: nowrap;
}

.menu__columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.menu__column {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.menu__list {
    list-style: none;
}

.menu__list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text);
    font-size: 1rem;
    position: relative;
    padding-left: var(--spacing-md);
}

.menu__list li::before {
    content: '🍹';
    position: absolute;
    left: 0;
}

.menu__sections {
    display: grid;
    gap: var(--spacing-lg);
}

.menu__section {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.menu__section-title {
    font-size: 1.8rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--color-primary);
    font-weight: 700;
}

.menu__note {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

/* ================================================
   飲み放題セクション
================================================ */
.nomihoudai {
    background: var(--color-white);
}

.nomihoudai__card {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.nomihoudai__header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-ocean));
    padding: var(--spacing-lg);
    text-align: center;
}

.nomihoudai__title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.nomihoudai__benefits {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.benefit__badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    color: var(--color-white);
    font-weight: 700;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.nomihoudai__pricing {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg);
    flex-wrap: wrap;
}

.price__item {
    text-align: center;
}

.price__label {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.price__amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-display);
}

.price__tax {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.price__divider {
    font-size: 2rem;
    color: var(--color-ocean);
    font-weight: 700;
}

.nomihoudai__content {
    padding: var(--spacing-lg);
}

.nomihoudai__subtitle {
    font-size: 1.8rem;
    color: var(--color-ocean);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.nomihoudai__categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.category {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
}

.category__title {
    font-size: 1.3rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-primary);
    font-weight: 700;
}

.category__list {
    list-style: none;
}

.category__list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text);
    position: relative;
    padding-left: var(--spacing-md);
}

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

.nomihoudai__note {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

/* ================================================
   ギャラリーセクション
================================================ */
.gallery {
    background: var(--color-bg);
}

.gallery__subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.gallery__item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    aspect-ratio: 4/3;
}

.gallery__item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery__item:hover img {
    transform: scale(1.1);
}

/* ================================================
   アクセスセクション
================================================ */
.access {
    background: var(--color-white);
}

.access__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.access__info {
    display: grid;
    gap: var(--spacing-md);
}

.info__item {
    display: flex;
    gap: var(--spacing-md);
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.info__item:hover {
    border-color: var(--color-primary);
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.info__icon {
    font-size: 2rem;
    color: var(--color-primary);
    min-width: 40px;
}

.info__content {
    flex: 1;
}

.info__title {
    font-size: 1.2rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.info__text {
    color: var(--color-text);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.info__note {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.access__map {
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-border);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.map__placeholder {
    text-align: center;
    color: var(--color-text-light);
    padding: var(--spacing-lg);
}

.map__placeholder i {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

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

.contact__container-center {
    max-width: 900px;
    margin: 0 auto;
}

.contact__info-full {
    text-align: center;
}

.contact__subtitle {
    font-size: 2.5rem;
    color: var(--color-ocean);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.contact__text {
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.contact__text strong {
    color: var(--color-primary);
    font-weight: 700;
}

.contact__methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.sns__card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 3px solid var(--color-border);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.sns__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition);
}

.sns__card:hover::before {
    left: 100%;
}

.sns__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.sns__card.instagram {
    border-color: #E1306C;
}

.sns__card.instagram:hover {
    border-color: #E1306C;
    background: linear-gradient(135deg, rgba(225, 48, 108, 0.05), rgba(253, 29, 29, 0.05));
}

.sns__card.tiktok {
    border-color: #000000;
}

.sns__card.tiktok:hover {
    border-color: #000000;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.03), rgba(254, 44, 85, 0.05));
}

.sns__icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    flex-shrink: 0;
}

.instagram .sns__icon-wrapper {
    background: linear-gradient(135deg, #E1306C, #FD1D1D, #F77737);
}

.tiktok .sns__icon-wrapper {
    background: linear-gradient(135deg, #000000, #FE2C55);
}

.sns__icon {
    font-size: 2.5rem;
    color: var(--color-white);
}

.sns__content {
    flex: 1;
    text-align: left;
}

.sns__title {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.sns__handle {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    font-family: monospace;
}

.sns__text {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 600;
}

.sns__arrow {
    font-size: 1.5rem;
    color: var(--color-text-light);
    transition: var(--transition);
}

.sns__card:hover .sns__arrow {
    color: var(--color-primary);
    transform: translateX(10px);
}

.contact__note {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-primary);
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.contact__note i {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-top: 2px;
}

.contact__note p {
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.8;
    margin: 0;
}

/* ================================================
   フッター
================================================ */
.footer {
    background: var(--color-bg-dark);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 4px solid var(--color-primary);
}

.footer__content {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.footer__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.footer__logo i {
    font-size: 2rem;
}

.footer__text {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
}

.footer__social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social__link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ================================================
   トップに戻るボタン
================================================ */
.scrolltop {
    position: fixed;
    right: 2rem;
    bottom: -20%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-ocean));
    color: var(--color-white);
    border-radius: 50%;
    font-size: 1.5rem;
    z-index: 50;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.scrolltop:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(78, 205, 196, 0.4);
}

.scrolltop.show-scroll {
    bottom: 2rem;
}

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

/* タブレット */
@media screen and (max-width: 968px) {
    .section__title {
        font-size: 2.5rem;
    }
    
    .hero__title {
        font-size: 4rem;
    }
    
    .hero__subtitle {
        font-size: 1.5rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--spacing-lg) var(--spacing-md);
        transition: 0.4s;
        box-shadow: var(--shadow-lg);
    }
    
    .nav__menu.show-menu {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav__close,
    .nav__toggle {
        display: block;
        font-size: 1.5rem;
        color: var(--color-text);
        cursor: pointer;
        transition: var(--transition);
    }
    
    .nav__close {
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
    }
    
    .nav__close:hover,
    .nav__toggle:hover {
        color: var(--color-primary);
    }
    
    .menu__grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .gallery__grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* モバイル */
@media screen and (max-width: 576px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .section__title {
        font-size: 2rem;
    }
    
    .hero__title {
        font-size: 3rem;
    }
    
    .hero__subtitle {
        font-size: 1.2rem;
    }
    
    .hero__description {
        font-size: 1rem;
    }
    
    .hero__buttons {
        flex-direction: column;
    }
    
    .hero__button {
        width: 100%;
    }
    
    .nav__menu {
        width: 100%;
    }
    
    .nav__logo span {
        font-size: 1.2rem;
    }
    
    .menu__grid {
        grid-template-columns: 1fr;
    }
    
    .menu__columns {
        grid-template-columns: 1fr;
    }
    
    .access__container {
        grid-template-columns: 1fr;
    }
    
    .contact__methods-grid {
        grid-template-columns: 1fr;
    }
    
    .nomihoudai__pricing {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .price__divider {
        transform: rotate(90deg);
    }
    
    .about__features {
        grid-template-columns: 1fr;
    }
    
    .gallery__grid {
        grid-template-columns: 1fr;
    }
    
    .scrolltop {
        right: 1rem;
    }
    
    .scrolltop.show-scroll {
        bottom: 1rem;
    }
}

/* 小さいモバイル */
@media screen and (max-width: 350px) {
    .hero__title {
        font-size: 2.5rem;
    }
    
    .section__title {
        font-size: 1.8rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}