/* =========================================
   Reset & Base Styles
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* パステル・ポップなカラーパレット */
    --color-primary: #ff8fab;
    /* メインピンク */
    --color-secondary: #ffc2d1;
    /* サブピンク */
    --color-accent: #fb6f92;
    /* アクセント濃いピンク */
    --color-bg: #fff0f3;
    /* 全体背景薄ピンク */
    --color-text-main: #4a4e69;
    /* メインテキスト色（濃いグレー紫） */
    --color-text-light: #9a8c98;
    --color-white: #ffffff;

    --font-heading: 'M PLUS Rounded 1c', sans-serif;
    --font-body: 'Kiwi Maru', serif;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
.logo,
.step-number {
    font-family: var(--font-heading);
    font-weight: 800;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
}

/* PC・スマホ問わず画面幅いっぱいに表示するためのラッパー */
.app-container {
    width: 100%;
    background-color: var(--color-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.main-content {
    flex: 1;
    /* コンテンツが少ない場合でもフッターを下部に押しやる */
    width: 100%;
}

/* =========================================
   Header 
   ========================================= */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 200;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px dashed var(--color-secondary);
}

.logo {
    font-size: 1.5rem;
    color: var(--color-accent);
    letter-spacing: 1px;
    z-index: 201;
}

.header-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.header-nav a {
    color: var(--color-text-main);
    font-weight: 700;
    text-decoration: none;
    transition: color 0.3s ease;
}

.header-nav a:hover {
    color: var(--color-accent);
}

.hamburger-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    padding: 0;
    z-index: 201;
}

.hamburger-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-text-main);
    border-radius: 3px;
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .hamburger-btn {
        display: flex;
    }

    .header-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 20px;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        z-index: 199;
        border-bottom: 2px dashed var(--color-secondary);
    }

    .header-nav.active {
        max-height: 400px;
        padding: 20px 0;
    }

    .header-nav a {
        font-size: 1.2rem;
    }

    .hamburger-btn.active span:nth-child(1) {
        transform: translateY(10.5px) rotate(45deg);
    }

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

    .hamburger-btn.active span:nth-child(3) {
        transform: translateY(-10.5px) rotate(-45deg);
    }
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    position: relative;
    padding: 40px 20px 60px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-secondary) 100%);
    text-align: center;
    border-bottom-left-radius: 40px;
    border-bottom-right-radius: 40px;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
}

.hero-title {
    font-size: 2rem;
    line-height: 1.4;
    margin-bottom: 15px;
    color: var(--color-text-main);
}

.hero-title .highlight {
    color: var(--color-accent);
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 12px;
    background-color: var(--color-primary);
    opacity: 0.3;
    z-index: -1;
    border-radius: 10px;
}

.hero-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
    font-weight: 500;
}

.store-badge {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    transition: transform 0.3s ease;
}

.store-badge img {
    height: 70px;
    width: auto;
}

.store-badge:hover {
    transform: scale(1.05);
}

.hero-mockup {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-mockup .mockup-img {
    border-radius: 30px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border: 8px solid var(--color-white);
    height: 400px;
    width: auto;
}

/* カルーセルコンテナと無限スクロールアニメーション */
.carousel-container {
    overflow: hidden;
    width: 100%;
    /* スマホ画面より少し広げるなど必要に応じて */
    margin-top: 20px;
    position: relative;
}

.carousel-track {
    display: flex;
    gap: 30px;
    /* モックアップ画像２セット分並べるため、自身の幅の50%分移動させる */
    animation: scrollCarousel 20s linear infinite;
    width: max-content;
}

/* 一時停止 */
.carousel-track:hover {
    animation-play-state: paused;
}

@keyframes scrollCarousel {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-50% - 15px));
    }

    /* 1セット分(全体の半分)の移動 - gapの半量考慮 */
}

/* PC等（マウス操作ができる端末）では、画面幅に関わらず自動スクロールを止め、中央揃えの手動横スクロールにする */
@media (hover: hover) {
    .carousel-container {
        overflow-x: auto;
        padding-bottom: 15px;
        /* スクロールバー用の余白 */
        -webkit-overflow-scrolling: touch;
    }

    /* スクロールバーのスタイル調整 */
    .carousel-container::-webkit-scrollbar {
        height: 8px;
    }

    .carousel-container::-webkit-scrollbar-track {
        background: var(--color-bg);
        border-radius: 4px;
    }

    .carousel-container::-webkit-scrollbar-thumb {
        background-color: var(--color-primary);
        border-radius: 4px;
    }

    .carousel-track {
        animation: none;
        width: max-content;
        min-width: 100%;
        margin: 0;
    }

    /* 要素が画面幅に収まる場合は中央揃え、あふれる場合は左側が切れないように左端からスクロールにする設定 */
    .carousel-track::before,
    .carousel-track::after {
        content: '';
        margin: auto;
    }

    .clone-img {
        display: none;
    }
}

/* =========================================
   Section Common
   ========================================= */
section:not(.hero) {
    padding: 60px 20px;
    scroll-margin-top: 80px;
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: 40px;
    position: relative;
}

.section-title::after {
    content: '♥';
    display: block;
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-top: 5px;
}

/* =========================================
   Features Section
   ========================================= */
.features {
    background-color: var(--color-white);
}

.feature-cards {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

/* PC等の大画面では横並びにする */
@media (min-width: 768px) {
    .feature-cards {
        flex-direction: row;
        justify-content: center;
    }

    .card {
        flex: 1;
    }
}

.card {
    background-color: var(--color-bg);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    border: 2px dashed var(--color-secondary);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--color-text-main);
    line-height: 1.4;
}

.card-desc {
    font-size: 0.95rem;
}

/* =========================================
   How To Use Section
   ========================================= */
.how-to-use {
    background-color: #fafcfc;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .steps-container {
        flex-direction: row;
        gap: 30px;
    }

    .step {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
}

.step {
    position: relative;
    background: var(--color-white);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    border-top: 5px solid var(--color-primary);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 20px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 1.1rem;
    box-shadow: 0 5px 15px rgba(255, 143, 171, 0.4);
}

.step-img {
    margin: 20px auto;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    max-width: 200px;
}

.step-text {
    text-align: center;
    margin-top: 20px;
}

.step-text h4 {
    color: var(--color-accent);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.step-text p {
    font-size: 0.95rem;
}

/* =========================================
   How To Print Section
   ========================================= */
.how-to-print {
    background: linear-gradient(to bottom, #fff, var(--color-bg));
}

.print-guide-card {
    background: var(--color-white);
    border: 3px solid var(--color-secondary);
    border-radius: 20px;
    padding: 30px;
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.print-guide-card::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px dashed var(--color-primary);
    border-radius: 12px;
    pointer-events: none;
}

.print-desc {
    font-size: 1rem;
    line-height: 1.8;
}

.print-desc strong {
    color: var(--color-accent);
    font-family: var(--font-heading);
}

/* =========================================
   CTA Bottom
   ========================================= */
.cta-bottom {
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    border-top-left-radius: 40px;
    border-top-right-radius: 40px;
}

.cta-bottom h2 {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.cta-bottom h2::after {
    display: none;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: #fff;
    font-size: 0.8rem;
}

/* =========================================
   Animations
   ========================================= */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   Guide Page Styles
   ========================================= */
.guide-header {
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 200;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    border-bottom: 2px dashed var(--color-secondary);
}

.back-link {
    position: absolute;
    left: 20px;
    color: var(--color-text-light);
    font-weight: bold;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--color-accent);
}

@media (max-width: 600px) {
    .guide-header {
        flex-direction: column;
        gap: 10px;
        padding-top: 15px;
        padding-bottom: 10px;
    }

    .back-link {
        position: relative;
        left: 0;
        align-self: flex-start;
    }
}

.guide-hero {
    padding: 30px 20px 40px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-secondary) 100%);
    text-align: center;
    border-bottom-left-radius: 40px;
    border-bottom-right-radius: 40px;
    margin-bottom: 40px;
}

.guide-hero-title {
    font-size: 1.8rem;
    color: var(--color-text-main);
}

.guide-toc {
    background-color: var(--color-white);
    border: 3px solid var(--color-secondary);
    border-radius: 20px;
    padding: 25px;
    margin: 0 auto 50px;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.guide-toc h3 {
    text-align: center;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.guide-toc ul {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

@media (min-width: 768px) {
    .guide-toc ul {
        grid-template-columns: 1fr 1fr;
    }
}

.guide-toc a {
    display: block;
    background-color: var(--color-bg);
    padding: 12px 20px;
    border-radius: 10px;
    color: var(--color-text-main);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 5px solid var(--color-primary);
}

.guide-toc a:hover {
    background-color: var(--color-secondary);
    transform: translateX(5px);
}

.guide-sections {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 50px;
    padding: 0 20px 60px;
}

.guide-card {
    background-color: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(255, 194, 209, 0.5);
    scroll-margin-top: 100px;
}

.guide-card-inner {
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .guide-card-inner {
        flex-direction: row;
    }

    .guide-card:nth-child(even) .guide-card-inner {
        flex-direction: row-reverse;
    }
}

.guide-card-content {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.guide-card-number {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-white);
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    border-radius: 50%;
    font-weight: bold;
    margin-bottom: 15px;
}

.guide-card-title {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.guide-card-desc {
    font-size: 1rem;
    line-height: 1.8;
}

.guide-card-desc ul,
.guide-card-desc ol {
    margin-left: 25px;
    margin-top: 15px;
}

.guide-card-desc li {
    margin-bottom: 10px;
}

.guide-card-image {
    flex: 1;
    background-color: var(--color-bg);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.guide-card-image img {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    height: auto;
}

/* トップページ用のリンクボタンスタイル */
.guide-link-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 25px;
    background-color: var(--color-white);
    color: var(--color-accent);
    border: 2px solid var(--color-primary);
    border-radius: 30px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(255, 143, 171, 0.2);
}

.guide-link-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255, 143, 171, 0.4);
}