:root {
    --primary-pink: #FFC0CB;
    --light-pink: #FFE8EE;
    --pastel-blue: #ADD8E6;
    --pastel-lavender: #E6E6FA;
    --pastel-green: #D0F0C0;
    --text-dark: #4A4A4A;
    --text-light: #FFFFFF;
    --font-rounded: 'M PLUS Rounded 1c', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-rounded);
    color: var(--text-dark);
    line-height: 1.6;
    background: linear-gradient(180deg, var(--light-pink) 0%, var(--pastel-lavender) 100%);
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
}


.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.flying-decorations-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 999;
}

.flying-deco {
    position: absolute;
    font-size: 3.5em;
    opacity: 0;
    animation: fly-up 8s ease-out forwards;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

@keyframes fly-up {
    0% {
        transform: translate(var(--initial-x), var(--initial-y)) scale(0.5) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    80% {
        transform: translate(var(--final-x), var(--final-y)) scale(1.2) rotate(var(--final-rotation, 360deg));
        opacity: 0.8;
    }
    100% {
        transform: translate(var(--final-x), var(--final-y)) scale(1.5) rotate(var(--final-rotation, 360deg));
        opacity: 0;
    }
}

.flying-deco:nth-child(1) { --initial-x: 10vw; --initial-y: 80vh; --final-x: 5vw; --final-y: -10vh; --final-rotation: 720deg; animation-delay: 0.5s; }
.flying-deco:nth-child(2) { --initial-x: 80vw; --initial-y: 90vh; --final-x: 70vw; --final-y: -20vh; --final-rotation: -540deg; animation-delay: 1s; }
.flying-deco:nth-child(3) { --initial-x: 30vw; --initial-y: 100vh; --final-x: 40vw; --final-y: -30vh; --final-rotation: 360deg; animation-delay: 1.5s; }
.flying-deco:nth-child(4) { --initial-x: 50vw; --initial-y: 70vh; --final-x: 60vw; --final-y: -5vh; --final-rotation: 480deg; animation-delay: 2s; }
.flying-deco:nth-child(5) { --initial-x: 15vw; --initial-y: 95vh; --final-x: 20vw; --final-y: -25vh; --final-rotation: -720deg; animation-delay: 2.5s; }
.flying-deco:nth-child(6) { --initial-x: 90vw; --initial-y: 85vh; --final-x: 85vw; --final-y: -15vh; --final-rotation: 360deg; animation-delay: 3s; }
.flying-deco:nth-child(7) { --initial-x: 45vw; --initial-y: 75vh; --final-x: 35vw; --final-y: -8vh; --final-rotation: 600deg; animation-delay: 3.5s; }
.flying-deco:nth-child(8) { --initial-x: 60vw; --initial-y: 105vh; --final-x: 50vw; --final-y: -35vh; --final-rotation: -360deg; animation-delay: 4s; }
.flying-deco:nth-child(9) { --initial-x: 5vw; --initial-y: 70vh; --final-x: 10vw; --final-y: -5vh; --final-rotation: 540deg; animation-delay: 4.5s; }

.header {
    background-color: var(--primary-pink);
    padding: 15px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 2.2em;
    color: var(--text-light);
    margin: 0;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-link {
    color: var(--text-light);
    transition: color 0.3s ease, transform 0.2s ease;
    display: inline-block;
}

.logo-link:hover {
    color: var(--pastel-blue);
    transform: scale(1.03);
}


.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.nav-list li {
    margin-left: 35px;
}

.nav-list a {
    color: var(--text-light);
    font-weight: 700;
    font-size: 1.1em;
    position: relative;
    padding-bottom: 8px;
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: var(--pastel-blue);
}

.nav-list a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 3px;
    background-color: var(--pastel-blue);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-list a:hover::after {
    width: 100%;
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger-menu span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-light);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu.active .nav-list {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(255, 192, 203, 0.95);
    box-shadow: none;
    padding: 80px 0 20px;
    border-top: none;
    justify-content: center;
    align-items: center;
}

.nav-menu.active .nav-list li {
    margin: 20px 0;
    text-align: center;
}
.nav-menu.active .nav-list a {
    font-size: 1.5em;
    color: var(--text-dark);
}
.nav-menu.active .nav-list a:hover {
    color: var(--text-light);
}
.nav-menu.active .nav-list a::after {
    background-color: var(--text-light);
}


.hero-section {
    background: linear-gradient(160deg, var(--primary-pink) 0%, var(--pastel-lavender) 50%, var(--pastel-blue) 100%);
    color: var(--text-light);
    text-align: center;
    padding: 120px 20px;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s forwards;
}
.delay-1 { animation-delay: 0.3s; }
.delay-2 { animation-delay: 0.6s; }

.hero-content {
    z-index: 10;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.25);
}

.hero-section h2 {
    font-size: 4em;
    margin-bottom: 25px;
    letter-spacing: 2px;
}

.hero-section p {
    font-size: 1.6em;
    margin-bottom: 50px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--pastel-blue);
    color: var(--text-light);
    padding: 18px 45px;
    border-radius: 50px;
    font-size: 1.3em;
    font-weight: 700;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    border: 3px solid var(--text-light);
}

.btn-primary:hover {
    background-color: #8EC0D7;
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.hero-decoration {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    filter: blur(25px);
    opacity: 0.8;
    z-index: 5;
    animation: pulse 4s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.1); opacity: 0.9; }
}

.hero-decoration.ribbon-top-left {
    width: 180px;
    height: 100px;
    top: 10%;
    left: -70px;
    transform: rotate(20deg);
    animation-delay: 0s;
}

.hero-decoration.ribbon-bottom-right {
    width: 200px;
    height: 110px;
    bottom: 5%;
    right: -80px;
    transform: rotate(-30deg);
    animation-delay: 0.5s;
}

.hero-decoration.dot-pattern {
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.7) 10%, transparent 10%);
    background-size: 30px 30px;
    filter: none;
    border-radius: 0;
    opacity: 0.4;
    animation: none;
}

.hero-decoration.dot-pattern.top-right {
    width: 150px;
    height: 150px;
    top: 5%;
    right: 5%;
    transform: rotate(10deg);
}

.hero-decoration.dot-pattern.bottom-left {
    width: 120px;
    height: 120px;
    bottom: 10%;
    left: 8%;
    transform: rotate(-20deg);
}

.common-section {
    padding: 80px 20px;
    background-color: var(--text-light);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.section-title {
    font-size: 2.8em;
    color: var(--primary-pink);
    margin-bottom: 60px;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background-color: var(--pastel-blue);
    border-radius: 3px;
}

.section-divider {
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--light-pink);
    overflow: hidden;
}

.section-divider img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.section-divider.ribbon-divider img {
    filter: drop-shadow(2px 2px 3px rgba(0,0,0,0.1));
}

.section-divider.ribbon-divider.reverse img {
    transform: rotateY(180deg);
}

.section-divider.dot-divider {
    background: linear-gradient(90deg, var(--pastel-lavender) 0%, var(--primary-pink) 50%, var(--pastel-blue) 100%);
}

.section-divider .dot-pink,
.section-divider .dot-blue {
    display: inline-block;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    margin: 0 5px;
    opacity: 0.8;
    animation: bounce 1.5s infinite alternate;
}

.section-divider .dot-pink {
    background-color: var(--primary-pink);
    animation-delay: 0s;
}
.section-divider .dot-blue {
    background-color: var(--pastel-blue);
    animation-delay: 0.2s;
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-5px); }
}


.about-section .about-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1em;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    line-height: 1.8;
}

.about-section .about-content p {
    margin-bottom: 15px;
}

.features-section {
    padding-top: 80px;
}

.feature-grid {
    display: flex;
    flex-wrap: nowrap; /* PCで折り返さないように変更 */
    gap: 20px;
    padding-bottom: 0px;
    justify-content: center;
    align-items: flex-start;
}

.feature-item {
    background-color: var(--light-pink);
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    justify-content: center;
    flex-shrink: 0;
    width: 250px; /* 固定幅に設定するか、必要に応じて調整 */
    min-width: 200px; /* 最小幅を設定 */
    aspect-ratio: 1 / 1;
    padding: 20px;
    box-sizing: border-box;
}

@media (min-width: 1024px) { 
    .feature-grid {
        flex-wrap: nowrap; 
        justify-content: center; 
    }
    .feature-item {
        width: 23%;
        min-width: 200px; 
    }
}

.feature-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: 40px;
    height: 40px;
    background-color: var(--pastel-green);
    border-radius: 50%;
    opacity: 0.6;
    filter: blur(10px);
}
.feature-item:nth-child(even)::before {
    top: auto;
    bottom: -10px;
    left: auto;
    right: -10px;
    background-color: var(--pastel-blue);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.2);
    background-color: var(--pastel-blue);
    color: var(--text-light);
}

.feature-item:hover .feature-emoji {
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.7));
}
.feature-item:hover h4 {
    color: var(--text-light);
}
.feature-item:hover p {
    color: var(--text-light);
}

.feature-emoji {
    font-size: 4em;
    margin-bottom: 5px;
    line-height: 1;
    transition: transform 0.3s ease;
}

.feature-item:hover .feature-emoji {
    animation: shake 0.5s infinite alternate;
}
@keyframes shake {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(3deg); }
    75% { transform: rotate(-3deg); }
    100% { transform: rotate(0deg); }
}

.feature-text-content {
    display: block;
    width: 100%;
    padding: 0;
    text-align: center;
}

.feature-item h4 {
    font-size: 1.3em;
    color: var(--primary-pink);
    margin: 0;
    padding-bottom: 0px;
    transition: color 0.3s ease;
    line-height: 1.1;
    white-space: normal;
    word-break: normal;
}

.feature-item p {
    font-size: 0.9em;
    color: var(--text-dark);
    margin: 0;
    padding-top: 0px;
    line-height: 1.3;
    white-space: normal;
    word-break: normal;
}


.join-section .join-intro {
    font-size: 1.2em;
    margin-bottom: 40px;
    color: var(--primary-pink);
    font-weight: 700;
}

.join-steps {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.step-item {
    background-color: var(--pastel-blue);
    color: var(--text-light);
    border-radius: 15px;
    padding: 20px 25px;
    width: 250px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.step-item:hover {
    transform: translateY(-8px) scale(1.02);
    background-color: var(--primary-pink);
}

.step-number {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--text-light);
    background-color: rgba(255, 255, 255, 0.2);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 15px;
    border: 2px solid var(--text-light);
}

.step-item p {
    font-size: 1.1em;
    margin: 0;
}

.btn-secondary {
    display: inline-block;
    background-color: var(--primary-pink);
    color: var(--text-light);
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 1.2em;
    font-weight: 700;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border: 3px solid var(--text-light);
}

.btn-secondary:hover {
    background-color: #E0A0B0;
    transform: translateY(-3px);
}


.news-list {
    max-width: 900px;
    margin: 0 auto 40px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    padding: 25px;
}

.news-item {
    display: flex;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px dashed var(--light-pink);
}
.news-item:last-child {
    border-bottom: none;
}

.news-date {
    font-size: 0.95em;
    color: #888;
    margin-right: 30px;
    min-width: 100px;
    text-align: left;
}

.news-item a {
    font-size: 1.15em;
    color: var(--text-dark);
    text-align: left;
    flex-grow: 1;
    transition: color 0.3s ease;
}
.news-item a:hover {
    color: var(--primary-pink);
    text-decoration: underline;
}

.btn-more-news {
    display: inline-block;
    background-color: var(--pastel-green);
    color: var(--text-dark);
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 1.1em;
    font-weight: 700;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.btn-more-news:hover {
    background-color: #B0E0A0;
    transform: translateY(-2px);
}


.footer {
    background-color: var(--primary-pink);
    color: var(--text-light);
    text-align: center;
    padding: 25px 0;
    font-size: 0.95em;
    position: relative;
    overflow: hidden;
}

.footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.footer-decoration {
    margin-top: 10px;
    display: flex;
    gap: 15px;
}

.footer-heart,
.footer-star {
    font-size: 1.5em;
    animation: float 3s infinite alternate ease-in-out;
}

.footer-heart { color: #FF69B4; animation-delay: 0s; }
.footer-star { color: #FFD700; animation-delay: 0.5s; }

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0px); }
}


@media (max-width: 768px) {
    .nav-list {
        display: none;
    }

    .hamburger-menu {
        display: flex;
    }

    .header .container {
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .logo {
        flex-basis: auto;
        text-align: left;
        margin-bottom: 0;
    }

    .nav-menu {
        width: auto;
    }
    
    .hero-section {
        min-height: 400px;
        padding: 80px 15px;
    }
    .hero-section h2 {
        font-size: 2.5em;
    }

    .hero-section p {
        font-size: 1.2em;
    }
    .btn-primary {
        padding: 12px 30px;
        font-size: 1.1em;
    }

    .hero-decoration.dot-pattern {
        display: none;
    }
    .hero-decoration.ribbon-top-left {
        width: 100px; height: 60px; top: 5%; left: -30px;
    }
    .hero-decoration.ribbon-bottom-right {
        width: 120px; height: 70px; bottom: 0; right: -40px;
    }


    .section-title {
        font-size: 2em;
        margin-bottom: 40px;
    }
    .section-title::after {
        width: 70px;
    }

    .feature-grid {
        flex-direction: column;
        align-items: center;
        gap: 20px;
        padding-bottom: 0;
    }
    .feature-item {
        width: 80%;
        max-width: 300px;
        padding: 20px;
    }
    .feature-emoji {
        font-size: 3.5em;
    }
    .feature-item h4 {
        font-size: 1.2em;
    }
    .feature-item p {
        font-size: 0.8em;
    }


    .join-steps {
        flex-direction: column;
        gap: 20px;
    }
    .step-item {
        width: 80%;
        max-width: 300px;
    }

    .news-list {
        padding: 20px;
    }
    .news-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 0;
    }
    .news-date {
        margin-right: 0;
        margin-bottom: 8px;
        font-size: 0.9em;
    }
    .news-item a {
        font-size: 1.05em;
    }

    .flying-deco {
        font-size: 2.5em;
        animation-duration: 6s;
    }
    .flying-deco:nth-child(1) { --initial-x: 5vw; --initial-y: 70vh; --final-x: 10vw; --final-y: -5vh; }
    .flying-deco:nth-child(2) { --initial-x: 70vw; --initial-y: 80vh; --final-x: 60vw; --final-y: -10vh; }
    .flying-deco:nth-child(3) { --initial-x: 20vw; --initial-y: 90vh; --final-x: 30vw; --final-y: -20vh; }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-section .animate-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s forwards, transform 1s forwards;
}

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

.hero-section .animate-fade-in.delay-1.is-visible {
    animation-delay: 0.3s;
}
.hero-section .animate-fade-in.delay-2.is-visible {
    animation-delay: 0.6s;
}