:root{--primary: #e94560;--primary-light: #ff6b6b;--bg-dark: #1a1a2e;--bg-darker: #16213e;--bg-darkest: #0f3460;--text-primary: #ffffff;--text-secondary: #a0a0a0;--text-muted: #6b6b6b}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-darker) 50%,var(--bg-darkest) 100%);color:var(--text-primary);min-height:100vh;line-height:1.6}#root{min-height:100vh;display:flex;flex-direction:column}a{color:var(--primary);text-decoration:none;transition:color .3s ease}a:hover{color:var(--primary-light)}h1,h2,h3,h4,h5,h6{line-height:1.2}.header{position:fixed;top:0;left:0;right:0;z-index:100;background:#1a1a2ef2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(233,69,96,.2)}.header-content{max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.header .logo{font-size:1.5rem;font-weight:700;background:linear-gradient(90deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav{display:flex;gap:2rem}.nav a{color:var(--text-secondary);font-weight:500;transition:color .3s ease}.nav a:hover{color:var(--primary)}.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:6rem 2rem 4rem}.hero-content{max-width:800px}.hero-title{font-size:clamp(3rem,10vw,6rem);font-weight:700;background:linear-gradient(90deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem}.hero-tagline{font-size:clamp(1.2rem,3vw,1.8rem);color:var(--text-secondary);margin-bottom:2rem}.hero-icons{font-size:3rem;margin-bottom:2rem;display:flex;justify-content:center;gap:1rem}.hero-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn{display:inline-block;padding:.8rem 2rem;border-radius:50px;font-weight:600;transition:all .3s ease}.btn-primary{background:linear-gradient(90deg,var(--primary),var(--primary-light));color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px #e945604d;color:#fff}.btn-secondary{border:2px solid var(--primary);color:var(--primary)}.btn-secondary:hover{background:var(--primary);color:#fff}.section-content{max-width:1200px;margin:0 auto;padding:6rem 2rem}.section-title{font-size:2.5rem;text-align:center;margin-bottom:3rem;background:linear-gradient(90deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.demo{background:#0f34604d}.demo-description{text-align:center;color:var(--text-secondary);margin-bottom:2rem;font-size:1.1rem}.demo-viewer{display:flex;justify-content:center;padding:2rem;background:#1a1a2e99;border-radius:16px;border:1px solid rgba(233,69,96,.2)}.demo-caption{text-align:center;color:var(--text-muted);margin-top:1.5rem;font-size:.9rem}.features{background:#16213e80}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card{background:#1a1a2ecc;border:1px solid rgba(233,69,96,.2);border-radius:16px;padding:2rem;text-align:center;transition:all .3s ease}.feature-card:hover{transform:translateY(-5px);border-color:var(--primary);box-shadow:0 10px 40px #e9456033}.feature-icon{font-size:3rem;display:block;margin-bottom:1rem}.feature-title{font-size:1.3rem;margin-bottom:.5rem;color:var(--text-primary)}.feature-description{color:var(--text-secondary);font-size:.95rem;line-height:1.6}.about-content{max-width:700px;margin:0 auto;text-align:center}.about-content p{font-size:1.1rem;color:var(--text-secondary);line-height:1.8;margin-bottom:2rem}.status-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 1.5rem;background:#e9456033;border:1px solid var(--primary);border-radius:50px;color:var(--primary);font-weight:500}.status-icon{font-size:1.2rem}.footer{margin-top:auto;background:#0f346080;border-top:1px solid rgba(233,69,96,.2)}.footer-content{max-width:1200px;margin:0 auto;padding:2rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.footer p{color:var(--text-muted)}.footer-links{display:flex;gap:1.5rem}.footer-links a{color:var(--text-secondary)}.footer-links a:hover{color:var(--primary)}@media(max-width:768px){.header-content{flex-direction:column;gap:1rem}.nav{gap:1rem}.hero{padding-top:8rem}.footer-content{flex-direction:column;text-align:center}}.shogi-container{display:flex;flex-direction:column;align-items:center;gap:12px;padding:16px;font-family:Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif}.shogi-board-wrapper{display:flex;flex-direction:column;align-items:center}.shogi-col-labels{display:flex;align-items:center;margin-bottom:4px}.shogi-label-spacer{width:0}.shogi-col-label{width:42px;text-align:center;font-size:14px;color:#333}.shogi-board-with-rows{display:flex;align-items:center}.shogi-board{display:flex;flex-direction:column;border:2px solid #8B4513;background:#deb887;box-shadow:inset 0 0 10px #0000001a,3px 3px 8px #0000004d}.shogi-row{display:flex}.shogi-square{width:42px;height:42px;border:1px solid #8B4513;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color .15s ease;background:transparent}.shogi-square:hover{background-color:#ffd7004d}.shogi-square.highlighted{background-color:#32cd3266}.shogi-square.last-move{background-color:#ffa50059}.shogi-row-labels{display:flex;flex-direction:column;margin-left:6px}.shogi-row-label{height:42px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#333;width:20px}.shogi-hand{display:flex;flex-direction:column;align-items:center;padding:8px 16px;background:#faebd7;border:1px solid #8B4513;border-radius:4px;min-width:200px}.shogi-hand-label{font-size:14px;font-weight:700;color:#333;margin-bottom:4px}.shogi-hand-pieces{display:flex;flex-wrap:wrap;gap:4px;justify-content:center;min-height:36px;align-items:center}.shogi-hand-piece{position:relative;display:flex;align-items:center}.shogi-hand-count{position:absolute;bottom:-2px;right:-4px;font-size:11px;font-weight:700;color:#fff;background:#8b4513;border-radius:50%;width:16px;height:16px;display:flex;align-items:center;justify-content:center}.shogi-hand-empty{font-size:12px;color:#888}.kifu-viewer{display:flex;gap:20px;justify-content:center;align-items:flex-start;flex-wrap:wrap;padding:20px}.kifu-viewer-main{display:flex;flex-direction:column;align-items:center;gap:16px}.kifu-controls{display:flex;gap:8px;justify-content:center;align-items:center}.kifu-control-btn{width:44px;height:44px;border:1px solid #8B4513;border-radius:6px;background:#faebd7;color:#333;font-size:18px;cursor:pointer;transition:all .15s ease;display:flex;align-items:center;justify-content:center}.kifu-control-btn:hover:not(:disabled){background:wheat;border-color:#654321}.kifu-control-btn:disabled{opacity:.4;cursor:not-allowed}.kifu-control-btn.active{background:#8b4513;color:#fff}.kifu-move-info{font-size:14px;color:#666;font-family:Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif}.kifu-moves-panel{width:180px;max-height:500px;border:1px solid #8B4513;border-radius:8px;overflow:hidden;background:#faebd7}.kifu-moves-header{background:#8b4513;color:#fff;padding:10px 12px;font-weight:700;font-size:14px;text-align:center}.kifu-moves-list{max-height:440px;overflow-y:auto}.kifu-move-item{padding:8px 12px;cursor:pointer;border-bottom:1px solid rgba(139,69,19,.2);font-size:13px;transition:background-color .15s ease;font-family:monospace}.kifu-move-item:hover{background:#8b45131a}.kifu-move-item.active{background:#ffa5004d;font-weight:700}.kifu-move-number{color:#888;margin-right:8px;min-width:28px;display:inline-block}.kifu-move-text{color:#333}.kifu-moves-list::-webkit-scrollbar{width:8px}.kifu-moves-list::-webkit-scrollbar-track{background:#8b45131a}.kifu-moves-list::-webkit-scrollbar-thumb{background:#8b4513;border-radius:4px}.kifu-moves-list::-webkit-scrollbar-thumb:hover{background:#654321}