:root {
    --primary: #ff4757;
    --secondary: #2f3542;
    --accent: #1e90ff;
    --bg-dark: rgba(0, 0, 0, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #ced4da;
    --font-family: 'Meiryo', 'メイリオ', 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-image: url('../assets/bg.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Background Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 100%);
    z-index: -1;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
}

nav a:hover, nav a.active {
    color: var(--text-main);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Main Content */
main {
    padding: 120px 2rem 60px;
    max-width: 1000px;
    margin: 0 auto;
    min-height: 100vh;
}

section {
    display: none;
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

section.active {
    display: block;
}

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

/* Typography */
h1, h2, h3 {
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; color: #fff; }
h2 { font-size: 2rem; color: var(--accent); border-left: 4px solid var(--accent); padding-left: 1rem; }

p { margin-bottom: 1.2rem; }

/* Glass Card */
.content-card {
    background: rgba(0, 0, 0, 0.7); /* 不透明度を上げて文字を読みやすく */
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
}

/* Illustration Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); /* サムネイルを小さくして列数を増やす */
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease;
    aspect-ratio: 1;
}

.gallery-item:hover {
    transform: scale(1.03);
}

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

/* Embeds */
.embed-container {
    margin: 2rem 0;
    width: 100%;
}

.youtube-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.youtube-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.twitter-embed {
    margin: 1.5rem 0;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

/* Modal / Lightbox */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 85vh;
    border-radius: 10px;
    animation: zoom 0.3s ease;
}

@keyframes zoom {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

.contact-link {
    color: var(--accent);
    font-size: 1.2rem;
    text-decoration: none;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
    text-align: center;
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: var(--accent);
}

/* Guide Styles */
.guide-item {
    margin-top: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.guide-item h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.guide-item h4 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    opacity: 0.9;
}

.guide-item ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.guide-item p {
    line-height: 1.8;
}

/* List Styles */
.award-list, .work-list {
    list-style: none;
}

.award-item {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.award-date {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--glass-border);
}

/* Responsive */
@media (max-width: 768px) {
    nav { padding: 1rem; }
    nav ul { gap: 1rem; }
    nav a { font-size: 0.8rem; }
    main { padding-top: 140px; }
    .content-card { padding: 1.5rem; }
}


/* Twitter Embed Fix */
.twitter-tweet {
    margin: 1rem auto !important;
    min-height: 250px;
    min-width: 250px;
}