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

html {
    scroll-behavior: smooth;
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    color: #1c252c;
    line-height: 1.75;
    background-color: #fdfbf7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color 0.9s ease, color 0.9s ease;
}

/* ==========================================================================
   ダークモード/ライトモード切り替え時に、色の変化をゆったりと滑らかにする
   ========================================================================== */
header,
.sub-header,
.about-section,
.genres-section,
.timeline-section,
footer,
.sub-page,
.history-project-box,
h1, h2, h3, p, a {
    transition: background-color 0.9s ease, color 0.9s ease, border-color 0.9s ease;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 4.5rem);
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
}

h3 {
    font-size: clamp(1.15rem, 2.5vw, 1.4rem);
}

p {
    font-size: clamp(0.9rem, 1.5vw, 0.95rem);
}

a {
    text-decoration: none;
    color: inherit;
    -webkit-tap-highlight-color: transparent;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

section {
    padding: clamp(50px, 6vw, 80px) max(20px, 4%);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ==========================================================================
   各大見出しの完全中央揃え ＆ アコーディオンホバー演出
   ========================================================================== */
h2,
[id*="main-heading"] {
    font-weight: 300;
    text-align: center;
    margin-bottom: clamp(25px, 4vw, 40px);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    position: relative;
}

h2::after,
[id*="main-heading"]::after {
    left: 50% !important;
    transform: translateX(-50%) !important;
}

/* ジャンル詳細ページのh2だけ、ホバーしたときにインタラクティブに線が伸びる演出 */
.genre-accordion-trigger {
    position: relative;
    padding-bottom: 8px;
    transition: color 0.3s ease;
}

.genre-accordion-trigger:hover {
    color: #0779b0;
}

.genre-accordion-trigger::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 40px;
    /* 初期状態の線の長さ */
    height: 1px;
    background-color: #0779b0;
    transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.genre-accordion-trigger:hover::after,
.genre-accordion-trigger:focus-visible::after {
    width: 150px;
    /* ホバーすると中央からスッと線が広がり、クリックできることをアピール */
}

.genre-accordion-trigger:focus-visible {
    outline: 2px solid #0779b0;
    outline-offset: 4px;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 12px clamp(25px, 3vw, 40px);
    border: 1px solid #0779b0;
    color: #0779b0;
    font-size: 0.85rem;
    letter-spacing: 1px;
    border-radius: 50px;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    background: transparent;
    white-space: nowrap;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.22, 1, 0.36, 1), transform 1s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(253, 251, 247, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(7, 121, 176, 0.08);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px max(20px, 4%);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    position: relative;
}

.logo-area {
    display: flex;
    align-items: center;
}

.logo {
    font-weight: 600;
    letter-spacing: 3px;
    font-size: 0.95rem;
    white-space: nowrap;
    color: #0779b0;
    z-index: 1010;
}

.header-nav ul {
    display: flex;
    list-style: none;
    align-items: center;
}

.header-nav li {
    margin-left: clamp(15px, 3vw, 40px);
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    font-weight: 500;
    text-transform: uppercase;
    white-space: nowrap;
}

.header-nav a {
    position: relative;
    transition: color 0.3s;
}

.header-nav a:hover {
    color: #0779b0;
}

.header-nav a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 0;
    height: 1px;
    background: #0779b0;
    transition: width 0.3s ease, left 0.3s ease;
}

.header-nav a:hover::after {
    width: 100%;
    left: 0;
}

.back-link {
    font-size: 0.75rem;
    letter-spacing: 1px;
    font-weight: 500;
    color: #0779b0;
    transition: color 0.3s;
    white-space: nowrap;
}

.back-link:hover {
    color: #05567d;
}

.hamburger-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 12px;
    z-index: 21000 !important;
    outline: none;
    border-radius: 6px;
}

.hamburger-btn:focus-visible {
    outline: 2px solid #0779b0;
    outline-offset: 2px;
}

.hamburger-btn .bar {
    display: block;
    width: 22px;
    height: 1px;
    background-color: #0779b0;
    margin-bottom: 6px;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease, margin 0.4s ease;
    pointer-events: none;
}

.hamburger-btn .bar:last-child {
    margin-bottom: 0;
}

.hamburger-btn.is-active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.hamburger-btn.is-active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.darkmode-toggle {
    background: #e4dfd5;
    border: none;
    width: 46px;
    height: 24px;
    border-radius: 50px;
    cursor: pointer;
    position: relative;
    padding: 0;
    outline: none;
    transition: background 0.8s ease;
    z-index: 1010;
    display: inline-flex;
    align-items: center;
    margin-right: clamp(75px, 10vw, 100px);
}

.darkmode-toggle:focus-visible {
    outline: 2px solid #0779b0;
    outline-offset: 3px;
}

.dark-theme .darkmode-toggle:focus-visible {
    outline-color: #50b6ff;
}

.darkmode-toggle .toggle-icon {
    display: block;
    width: 18px;
    height: 18px;
    background: #ffffff;
    border-radius: 50%;
    position: absolute;
    top: 3px;
    left: 3px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), background 0.8s ease;
}

.darkmode-toggle.is-dark {
    background: #0779b0;
}

.darkmode-toggle.is-dark .toggle-icon {
    transform: translateX(22px);
    background: #161f26;
}

.toggle-text {
    position: absolute;
    left: 56px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;
    color: #61737a;
    transition: color 0.8s ease;
}

/* Hero */
.hero {
    height: 100vh;
    min-height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f7f4ed;
    text-align: center;
    padding: 0 20px;
    max-width: 100% !important;
    width: 100% !important;
}

.hero-content h1 {
    font-weight: 200;
    letter-spacing: 4px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content h1 span {
    color: #0779b0;
    font-weight: 600;
}

.hero-content p {
    color: #61737a;
    letter-spacing: 0.4em;
    text-transform: uppercase;
}

.typed-cursor {
    font-weight: 200;
    color: #0779b0;
    animation: blink 0.8s infinite;
    margin-left: 2px;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

/* About Me (Top) */
.about-section {
    max-width: 100% !important;
    background-color: #ffffff;
    border-bottom: 1px solid rgba(7, 121, 176, 0.04);
}

.about-section .about-card-link {
    max-width: 1200px;
    margin: 0 auto;
}

.about-bento-card {
    position: relative;
    background: #fdfbf7;
    padding: clamp(30px, 5vw, 60px);
    border-radius: 12px;
    border: 1px solid rgba(7, 121, 176, 0.06);
    box-shadow: 0 10px 40px rgba(7, 121, 176, 0.01);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, background-color 0.9s ease;
}

.about-card-link:hover .about-bento-card {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(7, 121, 176, 0.04);
    border-color: rgba(7, 121, 176, 0.2);
}

.about-container {
    display: flex;
    align-items: center;
    gap: clamp(30px, 5vw, 80px);
}

.about-img {
    flex: 0 0 auto;
}

.about-img img {
    width: clamp(160px, 20vw, 240px);
    height: clamp(160px, 20vw, 240px);
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid #fdfbf7;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.about-text {
    flex: 1;
    min-width: 0;
}

.about-text h3 {
    margin-bottom: 15px;
    font-weight: 500;
    color: #0779b0;
}

.about-text .about-summary {
    color: #52626e;
    font-weight: 300;
}

/* Genre (Top 横一列3カラム) */
.genres-section {
    max-width: 100% !important;
    background-color: #fdfbf7;
}

.bento-grid-genre {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: max(16px, 2vw);
    max-width: 1200px;
    margin: 0 auto;
}

.genre-card-link {
    display: block;
    color: inherit;
    height: 100%;
}

.genre-card {
    position: relative;
    background: #ffffff;
    padding: clamp(35px, 4vw, 60px) clamp(25px, 3vw, 40px);
    border-radius: 12px;
    border: 1px solid rgba(7, 121, 176, 0.06);
    box-shadow: 0 10px 40px rgba(7, 121, 176, 0.01);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 250px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.5s ease, background-color 0.9s ease;
}

.genre-card-link:hover .genre-card {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(7, 121, 176, 0.04);
    border-color: rgba(7, 121, 176, 0.2);
}

.genre-card h3 {
    font-weight: 400;
    letter-spacing: 1px;
    color: #0779b0;
}

.genre-card p {
    color: #52626e;
    margin-top: 12px;
    font-weight: 300;
}

.view-more {
    font-size: 0.75rem;
    color: #0779b0;
    letter-spacing: 2px;
    font-weight: 600;
    text-transform: uppercase;
    margin-top: 30px;
    display: inline-block;
}

/* History Timeline */
.timeline-section {
    background-color: #ffffff;
    max-width: 100% !important;
    border-top: 1px solid rgba(7, 121, 176, 0.04);
    border-bottom: 1px solid rgba(7, 121, 176, 0.04);
}

.timeline-container {
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    padding-left: clamp(30px, 5vw, 50px);
}

.timeline-container::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 20px;
    width: 1px;
    height: calc(100% - 35px);
    background-color: rgba(7, 121, 176, 0.15);
}

.timeline-item {
    position: relative;
    margin-bottom: clamp(40px, 5vw, 60px);
}

.timeline-dot {
    position: absolute;
    left: -34px;
    top: 9px;
    width: 8px;
    height: 8px;
    background-color: #0779b0;
    border-radius: 50%;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: #0779b0;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: #1c252c;
}

.timeline-content p {
    color: #52626e;
    font-size: 0.9rem;
    font-weight: 300;
}

.more-link-container {
    text-align: center;
    margin-top: clamp(30px, 4vw, 50px);
}

.btn-more {
    font-weight: 500;
    border-color: rgba(7, 121, 176, 0.3);
    color: #0779b0;
    border-radius: 4px;
}

.btn-more:hover {
    border-color: #0779b0;
    background: rgba(7, 121, 176, 0.03);
    transform: translateY(-2px);
}

/* Contact */
.contact-section {
    text-align: center;
}

.contact-section p {
    margin-bottom: 40px;
    color: #52626e;
    font-size: 0.95rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: max(15px, 2vw);
    flex-wrap: wrap;
    width: 100%;
}

.btn-social {
    padding: 16px 45px;
    font-size: 0.85rem;
    letter-spacing: 2px;
    font-weight: 500;
    text-align: center;
    border-radius: 50px;
    flex: 0 1 220px;
}

.btn-x {
    border: 1px solid #0779b0;
    color: #0779b0;
}

.btn-x:hover {
    background: #0779b0;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(7, 121, 176, 0.2);
}

.btn-discord {
    border: 1px solid #5865F2;
    color: #5865F2;
}

.btn-discord:hover {
    background: #5865F2;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(88, 101, 242, 0.12);
}

footer {
    text-align: center;
    padding: 50px 24px;
    font-size: 0.75rem;
    color: #61737a;
    border-top: 1px solid rgba(7, 121, 176, 0.05);
    background: #ffffff;
    letter-spacing: 1px;
}

/* 下層詳細設定共通 */
.sub-page {
    background-color: #fdfbf7;
}

.sub-header {
    background-color: #ffffff;
}

.history-main,
.genre-main,
.about-detail-main {
    padding-top: clamp(100px, 12vw, 150px);
}

/* About Detail */
.about-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.about-detail-visual img {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.02);
}

.about-detail-content h2 {
    text-align: left;
    margin-bottom: 30px;
    color: #0779b0;
}

.about-detail-content h2::after {
    left: 0;
    transform: none;
    background-color: #0779b0;
}

.about-lead-text {
    font-size: 1.1rem;
    color: #1c252c;
    line-height: 1.7;
    margin-bottom: 40px;
    font-weight: 400;
}

.about-story-block {
    margin-bottom: 35px;
}

.about-story-block h3 {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: #0779b0;
}

.about-story-block p {
    color: #44515c;
    font-size: 0.95rem;
    line-height: 1.8;
    font-weight: 300;
}

.about-action-area {
    margin-top: 80px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.btn-history-link {
    display: inline-block;
    font-weight: 500;
    border: 1px solid #0779b0;
    color: #0779b0;
    padding: 14px 40px;
    border-radius: 4px;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    white-space: nowrap;
}

.btn-history-link:hover {
    background: #0779b0;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(7, 121, 176, 0.15);
}

/* History Detail */
.history-title-area {
    text-align: center;
    margin-bottom: 70px;
}

.history-sub-title {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #888;
    margin-bottom: 5px;
}

.history-wrapper {
    max-width: 850px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

.history-card-block {
    background: #ffffff;
    padding: clamp(25px, 4vw, 50px) clamp(20px, 4vw, 45px);
    border-radius: 12px;
    border: 1px solid rgba(7, 121, 176, 0.05);
}

.history-card-header {
    display: flex;
    align-items: flex-start;
    gap: clamp(20px, 4vw, 40px);
    border-bottom: 1px solid rgba(7, 121, 176, 0.06);
    padding-bottom: 20px;
    margin-bottom: 20px;
    position: relative;
    padding-right: 30px;
    cursor: pointer;
}

.history-card-header::after {
    content: '';
    position: absolute;
    right: 4px;
    top: 8px;
    width: 9px;
    height: 9px;
    border-right: 2px solid #0779b0;
    border-bottom: 2px solid #0779b0;
    transform: rotate(45deg);
    transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.history-card-header[aria-expanded="true"]::after {
    transform: rotate(225deg);
    top: 12px;
}

.history-card-header:focus-visible {
    outline: 2px solid #0779b0;
    outline-offset: 4px;
    border-radius: 4px;
}

.dark-theme .history-card-header::after {
    border-color: #50b6ff;
}

.dark-theme .history-card-header:focus-visible {
    outline-color: #50b6ff;
}

/* 【最重要】初期状態では高さをゼロにして非表示。history-card-headerクリックで開閉する */
.history-card-body {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 1.1s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s ease;
}

.history-card-body.is-visible {
    max-height: 2000px;
    opacity: 1;
}

.history-time-badge {
    flex: 0 0 clamp(130px, 18vw, 160px);
}

.history-time-badge .date {
    font-weight: 600;
    color: #0779b0;
}

.history-time-badge .status-badge {
    display: inline-block;
    background: #0779b0;
    color: #fff;
    font-size: 0.65rem;
    padding: 2px 10px;
    border-radius: 50px;
    margin-top: 6px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.history-info-meta {
    flex: 1;
    min-width: 0;
}

.history-info-meta h3 {
    font-weight: 500;
    line-height: 1.3;
    color: #1c252c;
}

.history-info-meta .role {
    font-size: 0.85rem;
    color: #61737a;
    margin-top: 4px;
}

.history-card-body .description {
    color: #44515c;
    font-weight: 300;
}

.history-project-box {
    background-color: #fdfbf7;
    padding: clamp(15px, 3vw, 30px);
    border-radius: 8px;
    margin-top: 20px;
    border: 1px solid rgba(7, 121, 176, 0.04);
}

.history-project-box h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #0779b0;
    margin-bottom: 10px;
}

.history-project-box ul {
    list-style-type: none;
}

.history-project-box li {
    font-size: 0.9rem;
    color: #44515c;
    position: relative;
    padding-left: 18px;
    margin-bottom: 8px;
    font-weight: 300;
}

.history-project-box li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: rgba(7, 121, 176, 0.4);
}

/* ==========================================================================Genre 各詳細ページのカード分割 ＆ アコーディオンアニメーション設定========================================================================== */
.genre-lead {
    text-align: center;
    color: #666;
    margin-bottom: clamp(30px, 5vw, 65px);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-size: max(0.9rem, 1.4vw);
    font-weight: 300;
}

.genre-detail-body {
    max-width: 750px;
    margin: 0 auto;
    background: transparent;
    padding: 0;
    border: none;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.genre-detail-block {
    background: #ffffff;
    padding: clamp(25px, 4vw, 40px) clamp(20px, 4vw, 35px);
    border-radius: 12px;
    border: 1px solid rgba(7, 121, 176, 0.05);
    box-shadow: 0 10px 30px rgba(7, 121, 176, 0.005);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, background-color 0.9s ease;
}

.genre-detail-block:hover {
    transform: translateY(-3px);
    border-color: rgba(7, 121, 176, 0.15);
}

.genre-detail-block h3 {
    font-weight: 500;
    margin-bottom: 12px;
    border-left: 3px solid #0779b0;
    padding-left: 15px;
    color: #0779b0;
}

/* 【最重要】初期状態では高さをゼロ、文字まではみ出しをカットして完全に非表示にする命令 */
.genre-detail-block p {
    color: #44515c;
    font-weight: 300;
    padding-left: 18px;
    line-height: 1.8;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 1.1s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s ease, margin-top 0.8s ease;
}

.genre-detail-block p.is-visible {
    max-height: 300px;
    opacity: 1;
    margin-top: 12px;
}

/* 想いブロック（stance-block） */
.stance-block {
    background-color: #f0f7fa;
    padding: clamp(30px, 4vw, 45px) clamp(20px, 4vw, 35px);
    border-radius: 12px;
    margin-top: 12px;
    border: 1px solid rgba(7, 121, 176, 0.1);
    box-shadow: 0 10px 30px rgba(7, 121, 176, 0.01);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, background-color 0.9s ease;
}

.stance-block:hover {
    transform: translateY(-3px);
    border-color: rgba(7, 121, 176, 0.25);
}

.stance-block h3 {
    border-left: none;
    padding-left: 0;
    text-align: center;
    color: #0779b0;
    margin-bottom: 15px;
    cursor: default;
}

/* 想いブロックの中のpタグも同様に最初は隠し、h2クリックで連動展開させます */
.stance-block p {
    padding-left: 0;
    text-align: center;
    color: #33414d;
        max-height: none !important; /* 隠蔽を無効化 */
    opacity: 1 !important; /* 常に透明度100% */
    overflow: visible !important;
    margin-top: 0;
}

.stance-block p.is-visible {
    max-height: 300px;
    opacity: 1;
    margin-top: 12px;
}

.genre-navigation {
    max-width: 750px;
    margin: 40px auto 80px auto;
    width: 100%;
    padding: 0 max(20px, 4%);
}

.genre-nav-container {
    display: flex;
    gap: 20px;
    width: 100%;
}

.genre-nav-item {
    flex: 1;
    background: #ffffff;
    padding: 25px 30px;
    border-radius: 12px;
    border: 1px solid rgba(7, 121, 176, 0.05);
    box-shadow: 0 10px 30px rgba(7, 121, 176, 0.005);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, background-color 0.9s ease;
}

.genre-nav-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(7, 121, 176, 0.05);
    border-color: rgba(7, 121, 176, 0.2);
}

.genre-nav-item .nav-label {
    font-size: 0.7rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: #888;
    margin-bottom: 4px;
    font-weight: 500;
}

.genre-nav-item .nav-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: #0779b0;
    letter-spacing: 0.5px;
}

/* ==========================================================================5. レスポンシブ対応 (ブレイクポイント)========================================================================== */
@media (max-width: 1024px) {
    .about-container {
        gap: 40px;
    }

    .bento-grid-genre {
        gap: 20px;
    }

    .about-detail-grid {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 18px 15px;
    }

    .hamburger-btn {
        display: block !important;
    }

    .darkmode-toggle {
        margin-right: 0 !important;
    }

    .toggle-text {
        position: absolute !important;
        left: 50% !important;
        top: -15px !important;
        transform: translateX(-50%) !important;
        font-size: 0.55rem !important;
        letter-spacing: 0.5px !important;
    }

    .header-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: rgba(253, 251, 247, 0.98) !important;
        backdrop-filter: blur(30px) !important;
        -webkit-backdrop-filter: blur(30px) !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        z-index: 20000 !important;
        transform: scale(0.95);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.6s;
    }

    .header-nav.is-open {
        transform: scale(1) !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
    }

    .header-nav ul {
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        gap: 35px;
        width: 100%;
        padding: 0;
        margin: 0;
        list-style: none;
    }

    .header-nav li {
        margin-left: 0;
        font-size: 1.1rem;
        letter-spacing: 4px;
    }

    .header-nav a::after {
        display: none;
    }

    section {
        padding: 90px 20px;
    }

    h2 {
        font-size: 1.6rem;
        margin-bottom: 50px;
    }

    .hero-content h1 {
        font-size: 2.8rem;
    }

    .hero-content p {
        font-size: 0.95rem;
    }

    .about-container {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .bento-grid-genre {
        grid-template-columns: 1fr !important;
        gap: 16px;
    }

    .about-bento-card {
        padding: 40px 24px;
    }

    .timeline-container {
        padding-left: 30px;
    }

    .timeline-container::after {
        left: 8px;
    }

    .timeline-dot {
        left: -25px;
        top: 10px;
        width: 6px;
        height: 6px;
    }

    .about-detail-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-detail-visual {
        text-align: center;
    }

    .history-card-header {
        flex-direction: column;
        gap: 12px;
    }

    .history-time-badge {
        flex: none;
    }

    /* スマホ時はアコーディオン展開時の文字のインデントをリセット */
    .genre-detail-block p {
        padding-left: 0;
    }

    .stance-block p {
        text-align: left;
    }

    .btn-social {
        flex: 1 1 100%;
    }
}

@media (max-width: 550px) {
    .genre-nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .genre-navigation {
        margin: 30px auto 60px auto;
    }

    .genre-nav-item {
        padding: 20px;
    }
}

@media (max-width: 360px) {
    .logo {
        font-size: 0.8rem;
        letter-spacing: 1px;
    }

    header li {
        margin-left: 10px;
        font-size: 0.7rem;
    }

    .btn-social {
        padding: 14px 20px;
    }
}

/* ==========================================================================6. ダークモード設定 (.dark-theme)========================================================================== */
.dark-theme {
    background-color: #12181d !important;
    color: #e4e9f0 !important;
}

.dark-theme .hero {
    background: #161f26 !important;
}

.dark-theme .about-section {
    background-color: #12181d !important;
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

.dark-theme .genres-section {
    background-color: #161f26 !important;
}

.dark-theme .timeline-section {
    background-color: #12181d !important;
    border-top-color: rgba(255, 255, 255, 0.05);
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

.dark-theme footer {
    background: #161f26 !important;
    border-top-color: rgba(255, 255, 255, 0.05);
    color: #8fa0ad;
}

.dark-theme header {
    background-color: rgba(18, 24, 29, 0.85) !important;
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

.dark-theme header a:hover {
    color: #50b6ff;
}

.dark-theme header a::after {
    background: #50b6ff;
}

.dark-theme .hamburger-btn .bar {
    background-color: #50b6ff !important;
}

.dark-theme .about-bento-card {
    background: #161f26 !important;
    border-color: rgba(255, 255, 255, 0.05);
}

.dark-theme .about-text .about-summary {
    color: #a3b3bf;
}

.dark-theme .genre-card {
    background: #12181d !important;
    border-color: rgba(255, 255, 255, 0.05);
}

.dark-theme .genre-card p {
    color: #a3b3bf;
}

.dark-theme .timeline-container::after {
    background-color: rgba(255, 255, 255, 0.1);
}

.dark-theme .timeline-dot {
    background-color: #50b6ff;
}

.dark-theme .timeline-date {
    color: #50b6ff;
}

.dark-theme .timeline-content h3 {
    color: #ffffff !important;
}

.dark-theme .timeline-content p {
    color: #e4e9f0 !important;
}

.dark-theme .logo,
.dark-theme .about-text h3,
.dark-theme .genre-card h3,
.dark-theme .view-more,
.dark-theme .typed-cursor,
.dark-theme .hero-content h1 span,
.dark-theme .history-info-meta h3,
.dark-theme .history-time-badge .date,
.dark-theme .genre-accordion-trigger:hover {
    /* アコーディオンホバー時の色反転 */
    color: #50b6ff !important;
}

.dark-theme .genre-accordion-trigger::after {
    background-color: #50b6ff !important;
}

.dark-theme .genre-accordion-trigger:focus-visible {
    outline-color: #50b6ff;
}

.dark-theme .btn {
    border-color: #50b6ff !important;
    color: #50b6ff !important;
}

.dark-theme .btn-more:hover {
    color: #50b6ff !important;
    border-color: #50b6ff !important;
    background: rgba(80, 182, 255, 0.05);
}

.dark-theme .history-card-block,
.dark-theme .genre-detail-body,
.dark-theme .genre-detail-block,
.dark-theme .genre-nav-item {
    background: #161f26 !important;
    border-color: rgba(255, 255, 255, 0.05) !important;
}

.dark-theme .sub-page {
    background-color: #12181d !important;
}

.dark-theme .sub-header {
    background-color: #161f26 !important;
}

.dark-theme .back-link {
    color: #50b6ff !important;
}

.dark-theme .back-link:hover {
    color: #ffffff !important;
}

.dark-theme .genre-nav-item .nav-title {
    color: #50b6ff !important;
}

.dark-theme .genre-lead {
    color: #b2c0cc !important;
}

.dark-theme .genre-detail-block h3 {
    color: #50b6ff !important;
    border-left-color: #50b6ff !important;
}

.dark-theme .genre-detail-block p {
    color: #e4e9f0 !important;
}

.dark-theme .stance-block {
    background-color: #12181d !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

.dark-theme .stance-block h3 {
    color: #50b6ff !important;
}

.dark-theme .stance-block p {
    color: #a3b3bf !important;
}

.dark-theme .history-time-badge .status-badge {
    background: #50b6ff !important;
    color: #12181d !important;
}

.dark-theme .history-project-box {
    background-color: #12181d !important;
    border-color: rgba(255, 255, 255, 0.03) !important;
}

.dark-theme .history-project-box h4 {
    color: #50b6ff !important;
}

.dark-theme .history-project-box li {
    color: #a3b3bf !important;
}

.dark-theme .history-project-box li::before {
    color: #50b6ff !important;
}

.dark-theme .history-info-meta .role {
    color: #8fa0ad !important;
}

.dark-theme .history-card-body .description {
    color: #e4e9f0 !important;
}

@media (max-width: 768px) {
    .dark-theme .header-nav {
        background-color: rgba(18, 24, 29, 0.98) !important;
    }
}

/* 印刷用最適化 */
@media print {

    header,
    footer,
    .back-link,
    .status-badge,
    .view-more,
    .btn {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        font-size: 11pt;
        line-height: 1.5;
        padding-top: 0 !important;
    }

    section,
    .history-main,
    .genre-main {
        padding: 0 !important;
        margin: 0 !important;
        max-width: 100% !important;
    }

    .history-card-block,
    .genre-detail-body {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        background: transparent !important;
    }

    .history-card-header {
        display: flex !important;
        flex-direction: row !important;
        gap: 30px !important;
    }

    .history-card-header::after {
        display: none !important;
    }

    .history-card-body {
        max-height: none !important;
        opacity: 1 !important;
        overflow: visible !important;
    }

    .history-card-block {
        page-break-inside: avoid;
        border-bottom: 1px solid #ccc !important;
        padding-bottom: 20px !important;
        margin-bottom: 20px !important;
    }

    @page {
        size: A4 portrait;
        margin: 20mm;
    }
}