/* =========================================
    基本設定
    ========================================= */
:root {
    --accent-color: #DFCEEA;
    
    /* ライトモード：文字色と同じ灰色に設定 */
    --repo-icon-color: #5D5D5D;

    /* ライトモード */
    --bg-gradient: linear-gradient(135deg, #DFCEEA 0%, #B5A0D9 100%);
    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-border: rgba(255, 255, 255, 0.4);
    --card-shadow: 0 8px 32px 0 rgba(100, 100, 150, 0.2);
    
    --text-main: #5D5D5D;
    --text-sub: #666666;
    --title-color: #5D5D5D;
    --title-shadow: none;

    --shape-1-color: #FFD1DC;
    --shape-2-color: #A890D3;
    
    --btn-bg: rgba(255, 255, 255, 0.8);
    --btn-border: 1px solid rgba(255,255,255,0.5);
    --btn-text: #555;
    --btn-hover-shadow: 0 6px 12px rgba(0,0,0,0.1);

    --line-color: rgba(255,255,255,0.5);
}

/* ダークモード */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #2a2333 100%);
        --glass-bg: rgba(20, 20, 30, 0.65);
        --glass-border: rgba(223, 206, 234, 0.15);
        --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);

        --repo-icon-color: var(--accent-color);

        --text-main: #f0f0f0;
        --text-sub: #b0b0b0;
        --title-color: var(--accent-color);
        --title-shadow: 0 0 10px rgba(223, 206, 234, 0.3);

        --shape-1-color: #4a3b69;
        --shape-2-color: #2d4059;

        --btn-bg: rgba(255, 255, 255, 0.05);
        --btn-border: 1px solid rgba(255, 255, 255, 0.1);
        --btn-text: #f0f0f0;
        --btn-hover-shadow: 0 0 15px rgba(223, 206, 234, 0.2);
        
        --line-color: rgba(255,255,255,0.15);
    }
}

/* =========================================
    レイアウト構造
    ========================================= */
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: “Helvetica Neue”, Arial, “Hiragino Kaku Gothic ProN”, “Hiragino Sans”, Meiryo, sans-serif;
    color: var(--text-main);
    overflow: hidden; 
    background-color: var(--accent-color);
}
@media (prefers-color-scheme: dark) {
    body { background-color: #1a1a2e; }
}

/* 背景固定 */
.fixed-background {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100dvh;
    background: var(--bg-gradient);
    z-index: -10;
}

/* 背景図形 */
.background-shapes div {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.7;
    animation: float 10s infinite ease-in-out alternate;
}
@media (prefers-color-scheme: dark) {
    .background-shapes div { filter: blur(90px); opacity: 0.5; animation-duration: 12s; }
}

.shape-1 { width: 300px; height: 300px; background: var(--shape-1-color); top: 10%; left: 20%; }
.shape-2 { width: 250px; height: 250px; background: var(--shape-2-color); bottom: 10%; right: 20%; animation-delay: -5s; }

@keyframes float {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(30px) scale(1.1); }
}

/* スクロールコンテナ */
.snap-container {
    width: 100%;
    height: 100dvh;
    overflow-y: scroll;
    overflow-x: hidden;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
}

/* =========================================
    前半：1画面1スナップのセクション
    ========================================= */
.snap-section {
    width: 100%;
    height: 100dvh; 
    scroll-snap-align: start; 
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    box-sizing: border-box;
}

/* 前半のカードは横に広がりすぎないように制限 */
.snap-section .card {
    max-width: 480px; 
    height: auto;
    margin: 0 auto;
}

/* =========================================
    後半：通常スクロールエリア (Bento Grid)
    ========================================= */
.flow-area {
    width: 100%;
    scroll-snap-align: start; 
    padding: 4rem 1rem 10rem; 
    box-sizing: border-box;
    
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
    /* align-items: start にして高さをコンテンツに合わせる */
    align-items: start;
}

/* カードの共通設定 */
.card {
    background: var(--glass-bg);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    padding: 2rem;
    
    width: 100%;
    box-sizing: border-box;
    text-align: left;
    position: relative;
    
    /* アニメーション用初期状態 */
    opacity: 0;
    transform: translateY(30px) scale(0.98);
    transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.active-reveal {
    opacity: 1 !important;
    transform: translateY(0) scale(1) !important;
}

/* --- コンテンツスタイル --- */
.text-center { text-align: center; }

hr {
    border: none;
    height: 1px;
    background-color: var(--line-color);
    margin: 1.5rem 0;
    width: 100%;
}

.avatar {
    width: 120px; height: 120px;
    object-fit: cover;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    display: block;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

h1 { font-size: 2rem; margin: 0.5rem 0; color: var(--title-color); text-align: center; font-weight: 700; }
h2 { font-size: 1.2rem; margin-bottom: 1.2rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--line-color); color: var(--title-color); display: flex; align-items: center; gap: 10px; }
.bio { font-size: 1rem; color: var(--text-sub); margin-bottom: 2rem; line-height: 1.7; text-align: center; }

.location-info { display: flex; justify-content: center; gap: 24px; margin-bottom: 2rem; font-size: 0.9rem; color: var(--text-sub); }
.location-info div { display: flex; align-items: center; gap: 8px; }

.links { display: flex; flex-direction: column; gap: 12px; }
.link-btn {
    display: flex; align-items: center; justify-content: center; text-decoration: none; padding: 14px 20px; border-radius: 50px; font-weight: bold; font-size: 1rem; transition: all 0.3s ease;
    background: var(--btn-bg); color: var(--btn-text); border: var(--btn-border);
}
.link-btn i { margin-right: 10px; font-size: 1.2rem; }
.link-btn:hover { transform: translateY(-4px); box-shadow: var(--btn-hover-shadow); }

@media (prefers-color-scheme: light) {
    .link-btn:hover { color: #fff; }
    .youtube:hover { background: #FF6B6B; }
    .github:hover { background: #333; }
    .twitter:hover { background: #000000; }
}
@media (prefers-color-scheme: dark) {
    .link-btn:hover { background: rgba(255, 255, 255, 0.1); color: var(--accent-color); border-color: var(--accent-color); }
}

/* Timeline */
.timeline { position: relative; padding-left: 1.5rem; border-left: 2px solid var(--line-color); }
.timeline-item { position: relative; margin-bottom: 1.8rem; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before { content: ''; position: absolute; left: -1.95rem; top: 0.4rem; width: 10px; height: 10px; background: var(--accent-color); border-radius: 50%; border: 3px solid var(--glass-bg); }
.time-date { font-size: 0.85rem; opacity: 0.7; margin-bottom: 0.3rem; display: block; font-weight: 600; }
.time-title { font-weight: bold; font-size: 1.05rem; }
.time-desc { font-size: 0.95rem; margin-top: 0.4rem; color: var(--text-sub); }

/* GitHub/Store Card */
.github-card {
    background: rgba(0,0,0,0.04); border-radius: 14px; padding: 1.2rem; margin-top: 0.8rem; display: flex; align-items: center; gap: 1rem; text-decoration: none; color: inherit; border: 1px solid transparent; transition: all 0.3s;
}
.github-card:hover { background: rgba(0,0,0,0.08); border-color: var(--repo-icon-color); transform: translateY(-2px); }
@media (prefers-color-scheme: dark) {
    .github-card { background: rgba(255,255,255,0.06); }
    .github-card:hover { background: rgba(255,255,255,0.1); }
}

.repo-icon { font-size: 2.2rem; color: var(--repo-icon-color); }
.repo-info h3 { margin: 0; font-size: 1rem; }
.repo-info p { margin: 0.4rem 0 0; font-size: 0.85rem; opacity: 0.8; }

/* YouTube */
.video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 14px; margin-bottom: 1.2rem; box-shadow: 0 6px 18px rgba(0,0,0,0.15); }
.video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
.video-desc { font-size: 0.95rem; color: var(--text-sub); line-height: 1.6; }

/* Bento Grid 拡張 (PC) */
@media (min-width: 769px) {
    .col-span-2 { grid-column: span 2; }
    .row-span-2 { grid-row: span 2; }
}

/* =========================================
    スマホ
   ========================================= */
@media (max-width: 768px) {
    .flow-area {
        grid-template-columns: 1fr;
        padding: 2rem 1.2rem 8rem;
        gap: 20px;
    }
    
    .card {
        padding: 1.5rem;
    }

    .snap-section .card {
        max-width: 90%;
    }

    .flow-area .reveal-target {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}