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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans', sans-serif;
    color: #3C3C3C;
    background-color: #16476A;
    line-height: 1.5;
}

.container {
    max-width: 390px;
    margin: 0 auto;
    background-color: #fff;
}

/* バナー */
.banner {
    width: 100%;
}

.banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* ナビゲーション */
.nav {
    width: 100%;
    padding: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(180deg, rgba(1, 228, 221, 1) 0%, rgba(1, 228, 221, 0) 81%);
    background-image: url(images/bg_navi.png);
}

.nav-buttons {
    width: 100%;
    max-width: 390px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.nav-row {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-row-top {
    gap: 16px;
}

.nav-row-bottom {
    gap: 8px;
}

.nav-button {
    display: inline-block;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-button img {
    width: 100%;
    height: auto;
    display: block;
}

.nav-button-large img {
    max-width: 172px;
}

.nav-button-small img {
    max-width: 114px;
}

/* 賞品セクション */
.prize {
    background-image: url(images/bg_prize.png8.png);
    padding: 32px 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.title-img {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.title-img img {
    width: 100%;
    max-width: 358px;
    height: auto;
    display: block;
}

.prize-card {
    width: 100%;
    background-color: #FFFBF0;
    border: 1px solid #FFAB3D;
    border-radius: 16px;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.prize-card img {
    width: 100%;
    height: auto;
    display: block;
}

.prize-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.prize-content img {
    width: 100%;
    height: auto;
    display: block;
}

.prize-text {
    width: 100%;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

.prize-text p {
    margin-bottom: 8px;
}

.prize-text p:last-child {
    margin-bottom: 0;
}

.divider {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.divider-buttons {
    width: 100%;
    max-width: 360px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 16px;
    align-items: center;
}

.divider-button {
    display: inline-block;
    text-decoration: none;
    flex-shrink: 0;
}

.divider-button img {
    width: 100%;
    max-width: 172px;
    height: auto;
    display: block;
}

/* 応募セクション */
.apply {
    background-color: #fff;
    background-image: url(images/bg_mint.png);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.apply-box {
    width: 100%;
    background-color: #E8FFFE;
    border: 2px solid #31C2BB;
    border-radius: 16px;
    padding: 16px 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.apply-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.apply-section h3 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.125;
    color: #0DA39B;
    margin-bottom: 8px;
}

.apply-section h4 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.333;
    color: #0DA39B;
    margin-bottom: 8px;
}

.apply-section p {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

.apply-steps {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.apply-step {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.apply-step img {
    width: 100%;
    max-width: 326px;
    height: auto;
    display: block;
}

.apply-step p {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.571;
    text-align: center;
    color: #3C3C3C;
}

.apply-button {
    width: 100%;
    display: flex;
    justify-content: center;
}

.apply-button a {
    display: inline-block;
    text-decoration: none;
}

.apply-button img {
    width: 100%;
    max-width: 326px;
    height: auto;
    display: block;
}

.apply-arrow {
    width: 100%;
    display: flex;
    justify-content: center;
}

.apply-arrow img {
    width: 100%;
    max-width: 326px;
    height: auto;
    display: block;
}

.apply-note {
    width: 100%;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

.apply-info-box {
    width: 100%;
    background-color: #E8FFFE;
    border: 2px solid #31C2BB;
    border-radius: 16px;
    padding: 16px 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-section h4 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.333;
    color: #16476A;
    margin-bottom: 8px;
}

.info-section p {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

/* 詳細セクション */
.detail {
    background-color: #FFF9EF;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.detail-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.detail-content h3 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.333;
    color: #0DA39B;
    margin-bottom: 8px;
}

.detail-text {
    width: 100%;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

.detail-text p {
    margin-bottom: 8px;
}

.detail-text p:last-child {
    margin-bottom: 0;
}

/* Q&Aセクション */
.qanda {
    background-color: #FFF9EF;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.qanda-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.qanda-content h3 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.333;
    color: #0DA39B;
    margin-bottom: 8px;
}

.qa-item {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.question {
    font-size: 12px;
    font-weight: 600;
    line-height: 1.5;
    color: #3C3C3C;
}

.answer {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    color: #3C3C3C;
}

/* レスポンシブ対応 */
@media (max-width: 390px) {
    .container {
        width: 100%;
    }
}