:root {
    --main-color: #2E86AB;
    --main-color-light: #A8DADC;
    --main-color-dark: #1D5F85;
    --secondary-color: #457B9D;
    --accent-color: #F1FAEE;
    --sub-color: #aecf98;
    --sub-color-light: #c8e0b8;
    --sub-color-dark: #8fb577;
    --deep-blue: #1D3557;
    --light-blue: #E3F2FD;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --bg-light: #f8f9fa;
    --bg-very-light: #fafbfc;
}

body {
    font-family: 'Hiragino Sans', 'Yu Gothic UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
}

.rocknroll-font {
    font-family: 'RocknRoll One', cursive;
}

/* 固定背景 */
.fixed-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(to bottom, #ffffff 0%, #ffffff 60%, #87cefa 100%);
    z-index: -1;
}

/* 水玉 */
.bubble {
    position: fixed;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    filter: blur(2px);
    color: rgba(255, 255, 255, 0.7);
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: "Orbitron", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
    letter-spacing: -2px;
    line-height: 1.2;
    text-shadow: 0 0 3px rgba(255, 255, 255, 0.3);
}

.bubble1 { font-size: 14px; }
.bubble2 { font-size: 18px; }
.bubble3 { font-size: 12px; }
.bubble4 { font-size: 20px; }
.bubble5 { font-size: 16px; }
.bubble6 { font-size: 22px; }

@keyframes bubble-fall1 {
    0% {
        top: -50px;
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    90% {
        opacity: 0.7;
    }
    100% {
        top: 100vh;
        opacity: 0;
    }
}

@keyframes bubble-fall2 {
    0% {
        top: -50px;
        opacity: 0;
    }
    15% {
        opacity: 0.6;
    }
    85% {
        opacity: 0.6;
    }
    100% {
        top: 100vh;
        opacity: 0;
    }
}

@keyframes bubble-fall3 {
    0% {
        top: -50px;
        opacity: 0;
    }
    20% {
        opacity: 0.8;
    }
    80% {
        opacity: 0.8;
    }
    100% {
        top: 100vh;
        opacity: 0;
    }
}

.bubble-animation1 {
    animation: bubble-fall1 12s infinite linear;
}

.bubble-animation2 {
    animation: bubble-fall2 16s infinite linear;
}

.bubble-animation3 {
    animation: bubble-fall3 10s infinite linear;
}

/* ナビゲーション */
.navbar {
    --bs-navbar-padding-y: 0 !important;
    background-color: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--main-color-dark);
    transition: all 0.3s ease;
    z-index: 1000;
}

.navbar-brand {
    font-weight: bold;
    color: var(--main-color) !important;
}

.navbar-brand img {
    height: 80px;
    width: auto;
}

.navbar-nav .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--main-color) !important;
}

/* メインビジュアル */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    color: white;
}

.logo-container {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

.hero-logo {
    max-width: 90vw;
    width: 800px;
    height: auto;
}

.reflection {
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.reflection:after {
    content: "";
    height: 100%;
    width: 30px;
    position: absolute;
    top: -100px;
    left: 50%;
    background-color: #fff;
    opacity: 0;
    transform: rotate(45deg);
    animation: reflection 4s ease-in-out infinite;
}
     
@keyframes reflection {
    0% { transform: scale(2) rotate(45deg); opacity: 0; }
    2% { transform: scale(20) rotate(45deg); opacity: 0.5; }
    4% { transform: scale(30) rotate(45deg); opacity: 0.3; }
    10% { transform: scale(45) rotate(45deg); opacity: 0.1; }
    100% { transform: scale(50) rotate(45deg); opacity: 0; }
}

.hero-subtitle-overlay {
    position: absolute;
    top: 95%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: white;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.5rem;
    z-index: 4;
    white-space: nowrap;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    animation: subtitleZoom 4s ease-in-out infinite;
}

@keyframes subtitleZoom {
    0%, 90%, 100% {
        transform: translateX(-50%) scale(1);
    }
    95% {
        transform: translateX(-50%) scale(1.05);
    }
}

.hero-info {
    font-size: 1.3rem;
    margin-top: 5rem;
    margin-bottom: 1rem;
}

.hero-date {
    color: var(--text-dark);
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-location {
    color: var(--text-dark);
    font-size: 1.4rem;
    opacity: 0.9;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 4;
    animation: bounce 2s infinite;
    cursor: pointer;
}

.scroll-indicator i {
    font-size: 2rem;
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.broadcast iframe {
    width: 100%;
    aspect-ratio: 16/9;
}

.info-date {
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--deep-blue);
    margin-bottom: 0;
}

.collapse {
    transition: height 0.5s ease, opacity 0.5s ease;
}

.collapsing {
    transition: height 0.5s ease, opacity 0.5s ease;
    opacity: 0.5;
}

/* 区切りバー */
.divider-section {
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    z-index: 1;
    padding: 3rem;
    margin: 6rem 0;
}

.section-slogan {
    position: relative;
    margin-top: -8rem;
    margin-left: calc(35dvw - 15rem);
    margin-right: 2dvw;
    margin-bottom: -6rem;
    z-index: 3;
}

.text-slogan {
    display: inline;
    font-size: 2.3rem;
    font-weight: 600;
    line-height: 1.9em;
    padding: 5px;
    background: rgba(255, 255, 255, 0.95);
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.text-gradient {
    background: linear-gradient(90deg, var(--main-color), var(--sub-color-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* コンテンツセクション（カード風） */
.content-section {
    margin: 4rem 0;
    padding: 0;
    z-index: 2;
    position: relative;
}

.section-card {
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    padding: 4rem 3rem;
    margin: 0 auto;
    max-width: 1200px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.section-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--deep-blue);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--main-color), var(--sub-color));
    border-radius: 2px;
}

.section-subtitle {
    margin-top: 2rem;
    font-size: 1.5rem;
    text-align: center;
    color: var(--deep-blue);
    position: relative;
    padding-bottom: 1rem;
}

.section-subtitle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--main-color), var(--sub-color));
    border-radius: 2px;
}

.lead {
    font-size: 1.5rem;
    font-weight: 600;
}

.thumbnail {
    box-shadow: rgba(0, 0, 0, 0.7) 0px 0px 15px -5px;
    width: 95%;
    object-fit: cover;
    transition: 0.5s all;
}

.thumbnail:hover {
    transform: scale(1.05);
    transition: 0.5s all;
}

.img-note {
    height: 300px;
}

.description {
    color: var(--deep-blue);
    margin-top: 1.5dvh;
    margin-bottom: 0.5dvh;
    text-align: center;
    padding: 1rem;
}

.img-title {
    position: relative;
}

.img-title p {
    font-size: 0.9rem;
    text-align: left;
    position: absolute;
    color: white;
    top: 0;
    left: 0;
    background: var(--sub-color-dark);
    padding: 0.3rem 0.5rem;
    margin: 1rem 1.5rem;
    transition: 0.5s all;
}

.svg {
    width: 6rem;
    height: auto;
}

.point-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 4px solid var(--sub-color);
    backdrop-filter: blur(10px);
}

.point-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.point-title {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.point-number {
    display: inline-flex;
    background: var(--sub-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.schedule-header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.schedule-time {
    font-size: 1.8rem;
    font-weight: 700;
    min-width: 120px;
    display: flex;
    align-items: center;
}

.schedule-genre {
    display: inline-block;
    padding: 6px 15px;
    background: linear-gradient(135deg, var(--main-color), var(--sub-color-dark));
    border: 1px solid var(--main-color-light);
    border-radius: 20px;
    font-size: 0.95rem;
    color: white;
    font-weight: 500;
    letter-spacing: 1px;
}

.schedule-tales {
    display: inline-block;
    padding: 6px 10px;
    margin: 0 3px 8px 0;
    background: linear-gradient(135deg, var(--sub-color-light), var(--sub-color));
    border: 1px solid var(--main-color-light);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 1px;
}


.schedule-icon {
    margin-top: 10px;
}

.schedule-icon img {
    border-radius: 10%;
    width: 100px;
    object-fit: cover;
    margin: 0 auto 1rem;
    aspect-ratio: 1;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    background-color: rgba(255, 255, 255, 0.9);
}

.schedule-content-section-short {
    margin-top: -2.5rem;
    padding-left: 120px;
}

.schedule-content-section {
    margin-top: -110px;
    padding-left: 120px;
}

.schedule-presenter {
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    margin-bottom: 20px;
}


.presenter-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.presenter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.presenter-header {
    background: linear-gradient(-45deg, var(--main-color-dark), var(--sub-color-light));
    color: white;
    text-align: center;
    padding: 2rem 1.5rem 1rem;
    position: relative;
}

.presenter-icon img {
    border-radius: 10%;
    width: 95%;
    object-fit: cover;
    margin: 0 auto 1rem;
    aspect-ratio: 1;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    background-color: rgba(255, 255, 255, 0.9);
}


.presenter-icon img:hover {
    transform: scale(1.05);
}

.presenter-name {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.presenter-genre {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 1rem;
    border-radius: 15px;
    display: inline-block;
}

.presenter-body {
    padding: 2rem 1.5rem;
}

.social-links {
    text-align: center;
    margin-bottom: 2rem;
}

.social-link {
    display: inline-block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    text-decoration: none;
    margin: 0 0.3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    vertical-align: top;
}

.social-link.x {
    background: #0F1419;
}

.social-link.pixiv {
    background: #0097fa;
}

.social-link.youtube {
    background: #FF0033;
}

.social-link.nicovideo {
    background: #202020;
}

.social-link.dic_nicovideo {
    background: #ffffff;
    margin: 0 0.8rem;
}

.social-link.litlink {
    background: #9594fa;
}

.social-link.xfolio {
    background: #ffffff;
}

.social-link.homepage {
    background: var(--main-color)
}

img.nicovideo {
    width: 20px;
    filter: invert(100%) sepia(1%) saturate(0%) hue-rotate(161deg) brightness(101%) contrast(102%);
}

img.dic_nicovideo {
    width: 40px;
}

img.litlink {
    width: 40px;
    border-radius: 50%;
}

img.xfolio {
    width: 40px;
}

.x-id {
    font-size: 0.7rem !important;
    color: var(--text-light) !important;
    text-decoration: none !important;
    margin: 0 0.5rem !important;
}

.presenter-title {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
}

i.fa-hand-pointo-up {
    color: var(--main-color-dark);
    margin-right: 0.5rem;
}

.presenter-list {
    list-style: none;
    padding: 0;
    margin 0;
}

.presenter-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
    position: relative;
    padding-left: 2rem;
    transition: all 0.3s ease;
}

.presenter-list li:last-child {
    border-bottom: none;
}

.presenter-list li:before {
    content: '\f00c';
    font-family: "Font Awesome 7 Free";
    font-weight: 900;
    color: #667eea;
    position: absolute;
    left: 0;
    top: 0.5rem;
}

.presenter-list li:hover {
    background: #f8f9ff;
    padding-left: 2.5rem;
}

.faq-item {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.faq-question {
    font-weight: bold;
    color: var(--deep-blue);
    margin-bottom: 0.5rem;
}

.faq-answer {
    color: var(--text-light);
    padding-left: 1rem;
    border-left: 3px solid var(--sub-color-light);
}

.faq-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
    justify-items: center;
}

.thanks-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
    justify-items: center;
}

.thanks-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease;
}

.thanks-item:hover {
    transform: scale(1.1);
}

.thanks-item img {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border-color: var(--main-color) !important;
    object-fit: cover;
}

.thanks-site-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease;
}

.thanks-site-item img {
    width: 200px;
    height: auto;
    margin: 0 auto;
    object-fit: fill;
}

.thanks-site-item:hover {
    transform: scale(1.1);
}

.credit-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease;
}

.credit-item img {
    width: 130px;
    height: 130px;
    margin: 0 auto;
    border-color: var(--main-color) !important;
    object-fit: cover;
}

.credit-item:hover {
    transform: scale(1.1);
}

.thanks-name {
    font-weight: bold;
    margin-top: 0.8rem;
}

.thanks-position {
    margin-top: -0.8rem;
    font-size: 0.8rem;
    font-weight: bold;
}

.credit-name {
    font-size: 0.8rem;
    font-weight: bold;
    margin-top: 0.6rem;
}

.banner {
    box-shadow: rgba(0, 0, 0, 0.7) 0px 0px 15px -5px;
}


/* PCでの列数設定 */
@media (min-width: 992px) {
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .thanks-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
    .thanks-grid-6 {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* スマートフォンでの列数設定 */
@media (max-width: 991px) {
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .thanks-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .thanks-grid-6 {
        grid-template-columns: repeat(3, 1fr);
    }
    .section-card {
        margin: 0 1rem;
        padding: 3rem 2rem;
    }
}

@media (max-width: 576px) {
    .thanks-grid-6 {
        grid-template-columns: repeat(2, 1fr);
    }
    .section-card {
        margin: 0 0.5rem;
        padding: 3rem 1.5rem;
    }

    .schedule-content-section {
        padding-left: 0;
        margin-top: -170px;
    }

    .schedule-content-section-short {
        padding-left: 0;
        margin-top: 0;
    }

    .schedule-icon {
        text-align: center;
        vertical-align: middle;
        height: 100%;
    }

    .schedule-icon img {
        width: 150px;
        opacity: 0.2;
    }
}

/* フッター */
.footer {
    background: linear-gradient(to bottom, var(--deep-blue) 0%, #0f2027 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    position: relative;
    z-index: 3;
    margin-top: 4rem;
}

.social-links {
    margin-bottom: 2rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin: 0 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--sub-color-light);
    transform: translateY(-3px);
}

.footer-text {
    font-size: 0.8rem;
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .fixed-background {
        background-attachment: scroll;
    }

    .fixed-background::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;            
        background: linear-gradient(to bottom, #ffffff 0%, #ffffff 60%, #87cefa 100%);
        z-index: -1;
        transition: all 0.3s ease;
    }

    .hero-subtitle-overlay {
        width: 100%;
        margin-top: 0.1rem;
        font-size: 1rem;
        padding: 0.1rem 0.3rem;
        display: inline-block;
        white-space: normal;
        text-align: center;
    }
    
    .hero-logo {
        width: 90vw;
        max-width: 600px;
    }
    
    .hero-info {
        margin-top: 1rem;
    }

    .hero-date {
        font-size: 1.4rem;
    }
    
    .hero-location {
        font-size: 1.0rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }

    .section-slogan {
        margin-left: 1rem;
        margin-bottom: -5.5rem;
    }

    .text-slogan {
        font-size: 1.3rem;
    }
    
    .point-title {
        flex-direction: column;
        text-align: center;
    }
    
    .point-number {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .schedule-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .schedule-time {
        font-size: 1.3rem;
        min-width: auto;
    }

    .schedule-genre {
        font-size: 0.9rem;
    }


    .schedule-title {
        font-size: 1.3rem;
    }

    .schedule-presenter {
        font-size: 1.0rem;
    }

    .schedule-content {
        font-size: 0.9rem;
    }


    .navbar-brand img {
        height: 50px;
    }

    .thanks-item img {
        width: 135px;
        height: 135px;
    }

    .thanks-site-item img {
        width: 100%;
        height: auto;
        margin: 0 auto;
        object-fit: fill;
    }

    .credit-item img {
        width: 100px;
        height: 100px;
    }

    .banner {
        box-shadow: rgba(0, 0, 0, 0.7) 0px 0px 15px -5px;
        width: 95%;
        object-fit: cover;
    }
}