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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Shippori Mincho", serif;
    color: #3f4a3f;
    background-color: #f8f8f4;
    line-height: 1.8;
}

img {
    width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 24px 20px;
    z-index: 10;
}

section {
    padding: 100px 80px;
}

/* ハンバーガーメニュー */

.menu-btn {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    width: 28px;
    height: 18px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 110;
}

.menu-btn span {
    display: block;
    width: 100%;
    height: 1px;
    background-color: #ffffff; /* FVでの色 */
    transition: background-color 0.4s ease;
    transform-origin: center;
    flex-shrink: 0;
}

.menu-btn.is-scrolled span {
    background-color: #333333; /* 変更後の色 */
}

.menu-btn.active span {
    background-color: #333333 !important;
}

.menu-btn.active span {
    background-color: #b4beb6;
}

.menu-btn.active span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.menu-btn.active span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
}

.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    z-index: 90;
}

.nav {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    z-index: 100;
}

.nav-menu {
    text-align: center;
}

.nav-menu li {
    margin: 20px 0;
}

.nav-menu a {
    color: #fff;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.nav-overlay.active,
.nav.active {
    opacity: 1;
    visibility: visible;
}

/* ハンバーガーメニューここまで */


/* index.html */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    background-image: url("../img/hero.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    text-align: center;
    color: #f7f5ef;
    padding: 0 20px;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(40, 48, 40, 0.18);
}

.hero h1,
.hero-copy,
.scroll {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.hero-copy {
    font-size: 0.9rem;
    letter-spacing: 0.12em;
}

.scroll {
    position: absolute;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%);
    text-align: center;
}

.scroll span {
    display: block;
}

.scroll .arrow {
    margin-top: 4px;
    font-size: 0.8rem;
}

.concept {
    padding: 100px 20px;
    text-align: center;
    background-color: #f8f8f4;
}

.concept-text {
    max-width: 520px;
    margin: 0 auto;
}

.sec-title {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: #4a5548;
    margin-bottom: 48px;
    position: relative;
}

.sec-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 1px;
    background-color: #cfcfc8;
    margin: 16px auto 0;
}

.concept p {
    font-size: 0.95rem;
    line-height: 2.4;
    letter-spacing: 0.08em;
    color: #5a6558;
}

.concept p+p {
    margin-top: 32px;
}


.season {
    padding: 140px 80px;
    background-color: #f8f8f4;
}

.season .sec-title {
    text-align: center;
    margin-bottom: 90px;
}

.season-list {
    max-width: 1100px;
    margin: 0 auto;
}

.season-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 80px;
    margin-bottom: 120px;
}

.season-item:last-child {
    margin-bottom: 0;
}

/* 交互 */
.season-list .season-item:nth-child(even) {
    flex-direction: row-reverse;
}

/* 画像 */
.season-image {
    width: 42%;
}

.season-image img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
}

/* テキスト */
.season-text {
    width: 34%;
    color: #4a5548;
}

.season-text h3 {
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    margin-bottom: 20px;
}

.season-text p {
    font-size: 0.92rem;
    line-height: 2.3;
    letter-spacing: 0.05em;
}

/* 左右で文字揃え変える */
.season-item:nth-child(odd) .season-text {
    text-align: left;
}

.season-item:nth-child(even) .season-text {
    text-align: right;
}

.season-item:nth-child(even) .season-text p {
    margin-left: auto;
}

.flow {
    padding: 100px 80px;
    background-image: url("../img/background.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.4);
    background: none;
}

.flow::before {
    content: "";
    position: absolute;
    inset: 0;

    background-image: url("../img/background.png");
    background-size: cover;
    background-position: center;

    opacity: 0.1;
    /* ←ここで調整 */
}

.flow>* {
    position: relative;
    z-index: 1;
}


.flow .sec-title {
    text-align: center;
    margin-bottom: 90px;
}

.flow-detail {
    max-width: 400px;
    margin: 0 auto;
}

.day {
    padding-bottom: 48px;
    margin-bottom: 48px;
    border-bottom: 1px dashed #b8beb4;
}

.day:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.day h3 {
    font-size: 1.15rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: #2f3a30;
    margin-bottom: 28px;
}

.flow-list {
    display: grid;
    grid-template-columns: 80px 1fr;
    row-gap: 24px;
    column-gap: 32px;
}

.flow-list dt {
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    color: #6c7468;
}

.flow-list dd {
    font-size: 0.92rem;
    line-height: 2;
    letter-spacing: 0.05em;
    color: #2f3a30;
}

.bottom-nav {
    padding: 100px 80px 120px;
    background-color: #f8f8f4;
}

.nav-lead {
    text-align: center;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    color: #6a7368;
    margin-bottom: 56px;
}

.nav-list {
    max-width: 820px;
    margin: 0 auto;
}

.nav-list li {
    border-bottom: none;
}

.nav-list li:first-child {
    border-top: none;
}

.nav-list a {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px 0;
    transition: 0.3s;
}

.nav-text {
    font-size: 1.2rem;
    letter-spacing: 0.08em;
    color: #4a5548;
}

.nav-line {
    flex: 1;
    border-bottom: 1px dashed #b8beb4;
}

.nav-arrow {
    font-size: 1rem;
    color: #4a5548;
    transition: 0.3s;
}


.footer {
    padding: 48px 20px 60px;
    text-align: center;
    background-color: #f8f8f4;
}

.copyright {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    color: #7b8479;
}

/* index.htmlここまで */


/* program.html */

/* hero */
.program-hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    background-image: url("../img/lake.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    display: flex;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
    color: #f7f5ef;
}

.program-hero::before {
    content: "";
    position: absolute;
    inset: 0;

    background: rgba(0, 0, 0, 0.2);
    /* ←ここで濃さ調整 */

    z-index: 0;
}

.hero-inner {
    margin-top: 80px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.hero-inner h1 {
    margin-bottom: 50px;
    font-size: 50px;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.08rem;
}

.lead {
    font-size: 30px;
    line-height: 1.6;
}

.desc {
    font-size: 16px;
    line-height: 2;
}

.lead,
.desc {
    margin-block: 35px;
}

/* heroここまで */

/* detail */

.program-detail {
    padding: 120px 80px;
    background-color: #f8f8f4;
}

.program-list {
    max-width: 1280px;
    margin: 0 auto;
}

.program-item {
    display: grid;
    grid-template-columns: 0.5fr 520px 0.5fr;
    align-items: center;
    margin-bottom: 70px;
    padding-bottom: 50px;
    position: relative;
}

.program-image,
.program-text {
    grid-row: 1;
}

.program-item::after {
    content: "";
    position: absolute;
    left: calc(50% - 260px);
    right: calc(50% - 260px);
    bottom: 0;
    border-bottom: 1px dashed #bdbdb6;
}

.program-item:last-child::after {
    display: none;
}

.program-image {
    width: 300px;
}

.program-image img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
}

/* 奇数：画像左 */
.program-item:nth-child(odd) .program-image {
    grid-column: 1;
    justify-self: start;
}

.program-item:nth-child(odd) .program-text {
    grid-column: 2;
}

/* 偶数：画像右 */
.program-item:nth-child(even) .program-image {
    grid-column: 3;
    justify-self: end;
}

.program-item:nth-child(even) .program-text {
    grid-column: 2;
}

.program-text {
    max-width: 520px;
    justify-self: start;
    color: #4a5548;
}

.program-head {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.program-number {
    width: 56px;
    flex-shrink: 0;
    font-size: 1.15rem;
    line-height: 1;
    color: #9a9a94;
    letter-spacing: 0.08em;
    margin: 0;
    padding: 0;
}

.program-body {
    border-left: 1px dashed #bdbdb6;
    padding-left: 28px;
    flex: 1;
}

.program-body h2 {
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    line-height: 1.2;
    margin: 0 0 12px 0;
}

.program-sub {
    font-size: 1rem;
    color: #5e665d;
    margin-bottom: 24px;
}

.program-body ul {
    margin: 0 0 30px 0;
    padding-left: 1.1em;
}

.program-body li {
    font-size: 0.95rem;
    line-height: 1.9;
    margin-bottom: 2px;
}

.program-note {
    font-size: 0.92rem;
    line-height: 2;
    color: #6c7368;
    margin-top: 28px;
}

/* detailここまで */

/* include */

.include {
    padding: 40px 60px;
    background-color: #f8f8f4;
}

.include .sec-title {
    text-align: center;
    margin-bottom: 24px;
}

.include-lead {
    text-align: center;
    font-size: 1rem;
    line-height: 1.8;
    color: #6c7368;
    margin-bottom: 80px;
}

.include-list {
    max-width: 980px;
    margin: 0 auto;
}

.include-item {
    display: grid;
    grid-template-columns: 220px 1fr;
    align-items: center;
    column-gap: 48px;
    padding: 20px 0;
}


.include-image img {
    width: 100%;
    display: block;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.include-text {
    border-bottom: 1px dashed #bdbdb6;
    padding-bottom: 20px;
}

.include-text h3 {
    font-size: 1.35rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: #4a5548;
    margin: 0 0 16px 0;
}

.include-text p {
    font-size: 0.95rem;
    line-height: 2;
    color: #6a7167;
    margin: 0;
}

/* includeここまで */

/* price */

/* hero */
.price-hero {
    position: relative;
    height: 60vh;
    min-height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    overflow: hidden;
}

.price-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("../img/lake.png");
    background-size: cover;
    background-position: center;

    -webkit-mask-image: linear-gradient(to bottom,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 50%,
            rgba(0, 0, 0, 0) 100%);
    mask-image: linear-gradient(to bottom,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 50%,
            rgba(0, 0, 0, 0) 100%);

    z-index: 0;
}

.price-hero .hero-inner {
    position: relative;
    z-index: 1;
    color: #f7f5ef;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.price-hero .hero-inner h1 {
    font-size: 2.5rem;
    margin-bottom: 32px;
    letter-spacing: 0.08em;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.price-hero .lead {
    font-size: 1.2rem;
    line-height: 1.8;
    margin: 0;
}

/* summary */
.price-summary {
    text-align: center;
    padding: 120px 20px;
}

.price-label {
    font-size: 1.2rem;
    color: #6c7368;
    margin-bottom: 16px;
}

.price-amount {
    font-size: 2rem;
    letter-spacing: 0.05em;
    color: #4a5548;
    margin-bottom: 40px;
}

.price-amount span {
    font-size: 1rem;
    margin-left: 6px;
}

.price-detail {
    margin-top: 60px;
}

.price-detail h2 {
    font-size: 1.2rem;
    margin-bottom: 24px;
    letter-spacing: 0.08em;
}

.price-detail ul {
    max-width: 420px;
    margin: 0 auto;
}

.price-detail li {
    font-size: 0.95rem;
    line-height: 2.4;
    color: #6a7167;
    position: relative;
    padding-left: 24px;
    text-align: left;
    margin-left: 50px;
}

.price-detail li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #8a9486;
}

/* priceここまで */

/* reserve-flow */
.reserve-flow {
    padding: 100px 80px;
}

.sec-title {
    text-align: center;
}

.reserve-flow-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 80px;
}

.flow-item {
    width: 280px;
    text-align: center;
    position: relative;
}

.flow-number {
    font-size: 1rem;
    color: #f8faf8;
    margin-bottom: 16px;
    background-color: #7F9083;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;

    position: absolute;
    top: -24px;
    left: -24px;
}

.flow-card {
    padding: 40px 24px;
    background-color: #f1f1ec;
}

.flow-card h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.flow-card p {
    font-size: 0.9rem;
    line-height: 2;
}

/* button */
.reserve-button-wrap {
    text-align: center;
    margin-top: 80px;
    margin-inline: auto;
}

.reserve-button {
    display: inline-block;
    padding: 16px 40px;
    border: 1px solid #7F9083;
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    border-radius: 30px;

    max-width: 400px;
    width: 100%;
    margin: 0 auto;

    transition: 0.3s;
}

.reserve-button:hover {
    background-color: #7F9083;
    color: #f8faf8;
    cursor: pointer;
}

/* reserve-flowここまで */

/* faq */
.faq {
    padding: 140px 80px;
}

.faq-list {
    max-width: 900px;
    margin: 60px auto 0;
}

.faq-item {
    border-bottom: 1px solid #e5e5df;
}

.faq-item:first-child {
    border-top: 1px solid #e5e5df;
}

.faq-question {
    width: 100%;
    padding: 24px 16px;
    background: transparent;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease, opacity 0.3s ease;
}

.faq-answer p {
    padding: 16px 16px 24px;
    margin: 0;
    line-height: 2;
    color: #6a7167;
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    padding: 16px 24px 24px;
    opacity: 1;
}

.faq-icon {
    transition: 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}