:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #888888;
    --accent-color: #000000;
    --border-color: #e0e0e0;
    --section-padding: 0;
    --container-width: 1200px;
    --font-main: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.9;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.5;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 60px;
}

/* ========================================
   Header
======================================== */
header {
    padding: 30px 60px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.4em;
}

header h1 a {
    color: inherit;
}

header nav ul {
    display: flex;
    gap: 50px;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* ========================================
   Sections - Full Screen Style
======================================== */
section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0;
}

/* ========================================
   Hero Section - ヘッダー高さを考慮して天地中央
======================================== */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 90px; /* ヘッダーの高さ分を加算 */
    position: relative;
    overflow: hidden;
    background-color: #0a0a0a;
}

.hero-video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

#hero .container {
    position: relative;
    z-index: 2;
    max-width: 100%;
    padding: 0 40px;
}

.hero-copy {
    color: #fff;
}

/* 英語がメイン - 1行に収まるサイズ */
.hero-copy-en {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.2;
    margin-bottom: 30px;
    white-space: nowrap;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
    animation-delay: 0.3s;
}

/* 日本語がサブ */
.hero-copy-ja {
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
    animation-delay: 0.8s;
    color: rgba(255, 255, 255, 0.7);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* IP Hero (without video) */
#ip-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 90px;
    position: relative;
    overflow: hidden;
    background-color: #0a0a0a;
}

#ip-hero .hero-video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#ip-hero .hero-video-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#ip-hero .hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

#ip-hero .container {
    max-width: 900px;
    position: relative;
    z-index: 1;
}

#ip-hero h2 {
    font-size: 2.8rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    line-height: 1.5;
    margin-bottom: 0;
    color: #fff;
}

#ip-hero p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 40px;
}

#ip-hero .project-number {
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 30px;
    text-transform: uppercase;
}

#ip-hero .ip-hero-lead {
    font-size: 1.05rem;
    line-height: 2.2;
}

#ip-hero .scroll-indicator {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.project-number {
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    color: var(--text-muted);
    margin-bottom: 30px;
    text-transform: uppercase;
}

/* ========================================
   Typography
======================================== */
h3 {
    font-size: 2.4rem;
    font-weight: 400;
    margin-bottom: 60px;
    letter-spacing: 0.02em;
    line-height: 1.5;
}

h4 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 30px;
    letter-spacing: 0.02em;
}

h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    letter-spacing: 0.05em;
}

p {
    margin-bottom: 30px;
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 400;
}

/* ========================================
   Concept Section - 印象的なアニメーション
======================================== */
#concept {
    background-color: #fafafa;
    min-height: auto;
    padding: 180px 0;
}

#concept .container {
    max-width: 1000px;
}

.concept-title {
    font-size: 4rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 100px;
    letter-spacing: 0.05em;
}

/* ボディコピーを大きく */
.concept-body p {
    font-size: 1.5rem;
    line-height: 2.2;
    margin-bottom: 60px;
}

/* 印象的なアニメーション - ブラーから出現 */
.animate-text {
    opacity: 0;
    filter: blur(10px);
    transform: translateY(30px);
    transition: opacity 0.6s ease, filter 0.6s ease, transform 0.6s ease;
}

.animate-text.is-visible {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
}

.sns-links {
    margin-top: 100px;
    display: flex;
    gap: 40px;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
}

.sns-links a {
    position: relative;
    padding-bottom: 5px;
}

.sns-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--text-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.sns-links a:hover::after {
    transform: scaleX(1);
}

.sns-links a:hover {
    opacity: 1;
}

/* ========================================
   Projects Section - 縦積みレイアウト
======================================== */
#projects {
    background-color: #ffffff;
    min-height: auto;
    padding: 180px 0;
}

#projects h3 {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 100px;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 100px;
}

.project-item {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

/* 画像 */
.project-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: #f0f0f0;
    margin-bottom: 30px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-item:hover .project-image img {
    transform: scale(1.03);
}

/* タイトル + 説明 + 詳細ボタン を横並び */
.project-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.project-text {
    display: flex;
    align-items: baseline;
    gap: 40px;
    flex: 1;
}

.project-text h4 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0;
    white-space: nowrap;
}

.project-text p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.project-btn {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    padding: 15px 35px;
    border: 1px solid var(--accent-color);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.project-btn:hover {
    background-color: var(--accent-color);
    color: #fff;
    opacity: 1;
}

/* ========================================
   About Us Section - 1行に収まるサイズ
======================================== */
#partnership {
    background-color: #0a0a0a;
    color: #ffffff;
    min-height: auto;
    padding: 180px 0;
}

#partnership h3 {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 60px;
    color: #666;
}

#partnership .container {
    max-width: 1200px;
}

/* 1行に収まるサイズ */
.about-lead {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 400;
    line-height: 1.4;
    margin-bottom: 40px;
    color: #fff;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.about-intro {
    font-size: 1rem;
    color: #888;
    margin-bottom: 120px;
}

.partner-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    margin-bottom: 120px;
}

.partner-item {
    margin-bottom: 0;
    padding: 50px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid #222;
    transition: all 0.3s ease;
}

.partner-item:hover {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: #444;
}

.partner-number {
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: #555;
    margin-bottom: 30px;
}

.partner-label {
    display: block;
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: #fff;
    margin-bottom: 25px;
    border-bottom: none;
    padding-bottom: 0;
}

.partner-item p {
    color: #888;
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 0;
}

.about-closing {
    font-size: 1rem;
    color: #888;
    line-height: 2;
    text-align: center;
    margin-top: 80px;
}

/* ========================================
   Contact / IP募集フォーム
======================================== */
#contact {
    background-color: #f5f5f5;
    min-height: auto;
    padding: 180px 0;
}

#contact h3 {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 60px;
}

#contact .container {
    max-width: 800px;
}

.contact-lead {
    font-size: 2.5rem;
    font-weight: 400;
    line-height: 1.4;
    margin-bottom: 30px;
    letter-spacing: 0.03em;
}

.contact-intro {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 80px;
    line-height: 2;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    padding: 20px;
    border: 1px solid var(--border-color);
    background-color: #fff;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #ccc;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.btn-submit {
    align-self: flex-start;
    margin-top: 20px;
}

/* ========================================
   IP Page - Messages Section with Avatar
======================================== */
#messages {
    background-color: #fafafa;
}

#messages .container {
    max-width: 900px;
}

.message-item {
    display: flex;
    gap: 40px;
    margin-bottom: 100px;
    align-items: flex-start;
}

.message-item:last-child {
    margin-bottom: 0;
}

.message-avatar {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #ddd;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    flex: 1;
}

.message-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.message-content p {
    font-size: 1.1rem;
    line-height: 2.2;
    margin-bottom: 0;
}

.message-group-photo {
    margin-top: 40px;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: #eee;
}

.message-item.with-photo {
    flex-wrap: wrap;
}

.message-item.with-photo .message-group-photo {
    width: 100%;
    margin-left: 0;
}

.message-group-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========================================
   IP Page - Prototypes Section (2カラム)
======================================== */
#prototypes {
    min-height: auto;
    padding: 180px 0;
}

#prototypes h3 {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 80px;
}

.member-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px;
}

.member-card {
    background-color: #fff;
    border: 1px solid var(--border-color);
}

.member-card-image {
    aspect-ratio: 1/1;
    overflow: hidden;
    background-color: #f0f0f0;
}

.member-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.member-card:hover .member-card-image img {
    transform: scale(1.03);
}

.member-card-content {
    padding: 30px;
}

.member-card-content h4 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.member-comment {
    display: flex;
    gap: 15px;
    align-items: flex-start;
    margin-bottom: 25px;
}

.member-avatar {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #ddd;
}

.member-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-comment p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 0;
}

.member-card .btn {
    margin-top: 0;
    padding: 15px 40px;
    font-size: 0.7rem;
}

/* Legacy member-item styles (for other pages) */
.member-item, .desc-item {
    margin-bottom: 120px;
}

/* ========================================
   IP Page - Prototypes Section
======================================== */
#prototypes {
    min-height: auto;
    padding: 150px 0;
}

#prototypes h3 {
    margin-bottom: 100px;
}

.member-item {
    max-width: 800px;
    padding-bottom: 80px;
    border-bottom: 1px solid var(--border-color);
}

.member-item:last-child {
    border-bottom: none;
}

.member-item h4 {
    font-size: 1.3rem;
    font-weight: 500;
}

.member-item p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ========================================
   CTA Section
======================================== */
#cta {
    background-color: #f5f5f5;
    text-align: center;
}

#cta .container {
    max-width: 1000px;
}

#cta h3 {
    font-size: 2.2rem;
    margin-bottom: 50px;
}

#cta p {
    font-size: 1.05rem;
    line-height: 2.2;
}

.cta-image {
    aspect-ratio: 16/9;
    overflow: hidden;
    margin: 60px 0;
    background-color: #ddd;
}

.cta-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========================================
   Button
======================================== */
.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    padding: 22px 60px;
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    margin-top: 40px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #333;
    opacity: 1;
}

/* ========================================
   Auction Page - Media Gallery
======================================== */
#media-gallery {
    min-height: auto;
    padding: 150px 0;
    padding-top: 180px;
}

#media-gallery h2 {
    font-size: 2.4rem;
    font-weight: 400;
    margin-bottom: 80px;
}

.main-visual {
    margin-bottom: 120px;
}

.caption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 30px;
    text-align: center;
}

.pr-video {
    margin-bottom: 120px;
}

.pr-video h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 40px;
}

.video-placeholder {
    aspect-ratio: 16/9;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
}

.detail-photos h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 50px;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.photo-item {
    padding: 40px;
    border: 1px solid var(--border-color);
    background-color: #fff;
}

.photo-item h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.photo-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ========================================
   Auction Main - 2カラムレイアウト
======================================== */
#auction-main {
    min-height: auto;
    padding: 150px 0 100px;
    padding-top: 180px;
}

#auction-main .project-number {
    margin-bottom: 50px;
}

.auction-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: start;
}

/* 左カラム - ギャラリー */
.auction-left {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.product-gallery {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.gallery-main {
    aspect-ratio: 1/1;
    overflow: hidden;
    background-color: #f0f0f0;
}

.gallery-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-thumbnails {
    display: flex;
    gap: 10px;
}

.gallery-thumbnails .thumb {
    width: 80px;
    height: 80px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
    background-color: #f0f0f0;
}

.gallery-thumbnails .thumb.active,
.gallery-thumbnails .thumb:hover {
    opacity: 1;
}

.gallery-thumbnails .thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 作品解説 */
.product-description h3 {
    font-size: 1.6rem;
    margin-bottom: 40px;
}

.desc-block {
    margin-bottom: 40px;
}

.desc-block h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.desc-block p {
    font-size: 1rem;
    line-height: 2;
    color: var(--text-muted);
}

/* 動画 */
.product-video h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.video-wrapper {
    aspect-ratio: 16/9;
    background-color: #000;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 右カラム - 入札等 */
.auction-right {
    position: sticky;
    top: 120px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* 入札セクション */
.bid-section {
    background-color: #fff;
    border: 1px solid var(--border-color);
    padding: 35px;
}

.bid-section h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 25px;
    letter-spacing: 0.02em;
}

.bid-status {
    margin-bottom: 25px;
}

.current-price {
    margin-bottom: 20px;
}

.current-price .label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.current-price .price {
    font-size: 2.4rem;
    font-weight: 400;
    letter-spacing: 0.03em;
}

.bid-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.bid-info strong {
    color: var(--text-color);
    font-weight: 500;
}

.bid-section .bid-form {
    flex-direction: column;
    gap: 12px;
    margin-top: 0;
}

.bid-section .bid-form input {
    padding: 15px 18px;
    font-size: 0.95rem;
}

.btn-bid {
    width: 100%;
    text-align: center;
    padding: 18px !important;
}

/* Product Spec */
.spec-section {
    background-color: #fafafa;
    padding: 35px;
}

.spec-section h4 {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 25px;
}

.spec-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.spec-row {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row dt {
    width: 100px;
    flex-shrink: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.spec-row dd {
    font-size: 0.85rem;
}

/* Comment Section */
.comment-section {
    background-color: #fff;
    border: 1px solid var(--border-color);
    padding: 35px;
}

.comment-section h4 {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.comment-lead {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.comment-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 25px;
}

.comment-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background-color: #ddd;
}

.comment-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comment-content p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comment-form textarea {
    padding: 15px;
    border: 1px solid var(--border-color);
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    min-height: 80px;
    outline: none;
    transition: border-color 0.3s ease;
}

.comment-form textarea:focus {
    border-color: var(--accent-color);
}

.view-all-comments {
    display: block;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 15px 0;
    margin-bottom: 20px;
    border-top: 1px solid var(--border-color);
    transition: color 0.3s ease;
}

.view-all-comments:hover {
    color: var(--accent-color);
}

.btn-comment {
    align-self: flex-end;
    padding: 12px 25px !important;
    font-size: 0.7rem !important;
}

/* Legacy Auction Status - 削除可能 */
#auction-status {
    background-color: #fafafa;
}

#auction-status h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 50px;
}

.status-board {
    background-color: #ffffff;
    padding: 60px;
    border: 1px solid var(--border-color);
    max-width: 600px;
}

.status-board p {
    font-size: 0.9rem;
    margin-bottom: 25px;
    color: var(--text-muted);
}

.status-board strong {
    font-size: 2.8rem;
    font-weight: 400;
    color: var(--text-color);
    display: block;
    margin-top: 10px;
    letter-spacing: 0.05em;
}

.bid-form {
    margin-top: 50px;
    display: flex;
    gap: 15px;
}

.bid-form input {
    padding: 18px 25px;
    border: 1px solid var(--border-color);
    flex-grow: 1;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.bid-form input:focus {
    border-color: var(--accent-color);
}

.bid-form .btn {
    margin-top: 0;
}

/* ========================================
   Description Section
======================================== */
#description {
    min-height: auto;
    padding: 150px 0;
}

#description h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 50px;
}

#description h4 {
    font-size: 1.6rem;
    font-weight: 400;
    margin-bottom: 60px;
}

.desc-item {
    max-width: 800px;
    margin-bottom: 80px;
}

.desc-item h5 {
    font-size: 1rem;
    margin-bottom: 20px;
}

.desc-item p {
    line-height: 2.2;
}

/* ========================================
   Spec Table
======================================== */
#spec {
    background-color: #fafafa;
    min-height: auto;
    padding: 150px 0;
}

#spec h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 50px;
}

table {
    width: 100%;
    max-width: 800px;
    border-collapse: collapse;
    border: none;
}

th, td {
    padding: 30px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 500;
    width: 30%;
    color: var(--text-muted);
    font-size: 0.9rem;
    background: transparent;
}

td {
    font-size: 1rem;
}

/* ========================================
   Comments
======================================== */
#comments {
    min-height: auto;
    padding: 150px 0;
}

#comments h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 30px;
}

#comments > .container > p {
    margin-bottom: 60px;
}

blockquote {
    font-size: 1.1rem;
    line-height: 2;
    padding: 50px;
    background-color: #fafafa;
    margin-bottom: 30px;
    border-radius: 0;
}

/* ========================================
   Footer
======================================== */
footer {
    padding: 120px 60px;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
}

footer nav ul {
    display: flex;
    gap: 50px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.company-info {
    text-align: center;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

/* ========================================
   Scroll Indicator - ヒーロー下部にピッタリ
======================================== */
.scroll-indicator {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    padding-bottom: 30px;
}

.scroll-indicator span {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, #fff, transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% {
        top: -100%;
    }
    100% {
        top: 100%;
    }
}

/* ========================================
   Back to Top Button - 矢印
======================================== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 999;
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #333;
    opacity: 1;
}

.back-to-top-arrow {
    font-size: 1.2rem;
    line-height: 1;
}

/* ========================================
   Image Modal
======================================== */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.image-modal.is-active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    cursor: pointer;
}

.modal-content {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 90vh;
}

.modal-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 50%;
    box-shadow: 0 0 60px rgba(255, 255, 255, 0.1);
}

.modal-close {
    position: absolute;
    top: -50px;
    right: -50px;
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background-color: #fff;
    color: #000;
    border-color: #fff;
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 1024px) {
    .partner-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .project-text {
        flex-direction: column;
        gap: 10px;
    }
    
    .about-lead {
        white-space: normal;
    }
    
    .member-grid {
        gap: 40px;
    }
    
    /* Auction 2カラム → 1カラム */
    .auction-layout {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .auction-right {
        position: static;
    }
}

@media (max-width: 768px) {
    header {
        padding: 20px 30px;
        flex-direction: column;
        gap: 20px;
    }

    header nav ul {
        gap: 25px;
    }

    .container {
        padding: 0 30px;
    }

    section {
        min-height: auto;
        padding: 100px 0;
    }

    #hero {
        min-height: 100vh;
    }
    
    .hero-copy-en {
        font-size: 1.8rem;
        white-space: normal;
    }
    
    .hero-copy-ja {
        font-size: 0.9rem;
    }

    #ip-hero {
        min-height: 100vh;
        padding-top: 100px;
    }

    #ip-hero h2 {
        font-size: 1.8rem;
    }
    
    #ip-hero .ip-hero-lead {
        font-size: 0.95rem;
    }

    h3 {
        font-size: 1.8rem;
    }
    
    .concept-title {
        font-size: 2.4rem;
    }
    
    .concept-body p {
        font-size: 1.2rem;
    }
    
    .about-lead {
        font-size: 1.6rem;
    }
    
    .contact-lead {
        font-size: 1.8rem;
    }
    
    .partner-list {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .partner-item {
        padding: 30px;
    }

    .project-item, .member-item {
        margin-bottom: 80px;
        padding-bottom: 60px;
    }

    .photo-grid {
        grid-template-columns: 1fr;
    }

    .bid-form {
        flex-direction: column;
    }

    .status-board {
        padding: 40px;
    }

    footer {
        padding: 80px 30px;
    }
    
    /* IP Page - Messages */
    .message-item {
        flex-direction: column;
        gap: 20px;
    }
    
    .message-avatar {
        width: 60px;
        height: 60px;
    }
    
    /* IP Page - Prototypes */
    .member-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .member-card-content {
        padding: 25px;
    }
    
    .member-comment {
        flex-direction: column;
        gap: 15px;
    }
    
    /* Auction Page */
    #auction-main {
        padding-top: 120px;
    }
    
    .gallery-thumbnails .thumb {
        width: 60px;
        height: 60px;
    }
    
    .bid-section,
    .spec-section,
    .comment-section {
        padding: 25px;
    }
    
    .current-price .price {
        font-size: 2rem;
    }
}