@import"https://fonts.googleapis.com/css2?family=Lora:wght@400;600;700;800&display=swap";body{margin:0;font-family:Arial,sans-serif;background:#f2ebdd}*{box-sizing:border-box}button{font:inherit}.app-shell{min-height:100vh;display:grid;grid-template-columns:360px 1fr;gap:36px;padding:28px;align-items:start}.left-column{display:flex;flex-direction:column;justify-content:flex-start;gap:22px;max-width:500px}.board-column{display:flex;justify-content:flex-end;align-items:flex-start;min-width:0}.board-shell{width:min(650px,100%);padding:18px;border-radius:28px;background:#e0d4bd;box-shadow:0 20px 50px #0000004d,inset 0 1px #ffffff0a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.tutor-panel{display:flex;flex-direction:column;align-items:flex-start;gap:12px;position:relative}.tutor-card{background:#ff66c4;padding:12px;display:flex;flex-direction:row;align-items:center;width:510px}.tutor-text{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 12px;gap:6px}.tutor-title{font-family:Lora,serif;margin:0;font-size:55px;font-weight:800;color:#fff}.tutor-subtitle{font-family:Lora,serif;margin:0;font-size:19px;font-weight:600;color:#fff;text-align:center}.tutor-image-box{width:200px;flex:0 0 auto}.tutor-image-wrap{width:100%;aspect-ratio:1 / 1;background:#fff6ef}.tutor-image{width:100%;height:100%;object-fit:cover;display:block}.control-navbar{display:flex;align-items:center;gap:8px;width:280px;background:#ab9585;border-radius:10px;padding:8px 10px;box-shadow:0 4px 16px #00000040}.nav-icon-btn{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border:none;border-radius:10px;background:#ffffff14;cursor:pointer;transition:background .15s ease,transform .12s ease,opacity .15s ease;flex-shrink:0;padding:0}.nav-icon-btn:hover:not(:disabled){background:#ffffff29;transform:translateY(-1px)}.nav-icon-btn:active:not(:disabled){transform:scale(.94)}.nav-icon-btn--disabled,.nav-icon-btn:disabled{opacity:.35;cursor:not-allowed}.nav-icon-img{width:35px;height:35px;object-fit:contain;filter:brightness(0) invert(1)}.new-game-button{flex:1;border:none;border-radius:10px;padding:10px;background:#fff;color:#111827;font-weight:700;font-size:15px;cursor:pointer;white-space:nowrap;transition:transform .15s ease,box-shadow .15s ease}.new-game-button:hover{transform:translateY(-1px);box-shadow:0 6px 18px #f50bed61}.new-game-button:active{transform:scale(.96)}.settings-overlay{position:fixed;inset:0;background:#0000008c;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);z-index:1000;display:flex;align-items:center;justify-content:center}.settings-modal{background:#fdf6ec;border-radius:20px;padding:28px 28px 24px;width:320px;max-width:90vw;box-shadow:0 24px 60px #00000059;display:flex;flex-direction:column;gap:20px;animation:modal-pop .2s cubic-bezier(.34,1.56,.64,1) both}@keyframes modal-pop{0%{opacity:0;transform:scale(.88) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.settings-title{margin:0;font-size:18px;font-weight:800;color:#1a1512;letter-spacing:-.3px}.settings-section{display:flex;flex-direction:column;gap:10px}.settings-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:#6b5c4e}.settings-options{display:flex;gap:8px;flex-wrap:wrap}.settings-option-btn{flex:1;min-width:60px;padding:9px 10px;border:2px solid #d4c4b0;border-radius:10px;background:transparent;color:#3d2e22;font-size:13px;font-weight:600;cursor:pointer;transition:all .14s ease}.settings-option-btn:hover{border-color:#ff66c4;color:#c0006e;background:#ff66c40f}.settings-option-btn--active{border-color:#ff66c4;background:#ff66c4;color:#fff}.settings-option-btn--active:hover{background:#e558b0;border-color:#e558b0;color:#fff}.settings-actions{display:flex;gap:10px;margin-top:4px}.settings-cancel-btn{flex:1;padding:11px;border:2px solid #d4c4b0;border-radius:10px;background:transparent;color:#6b5c4e;font-size:13px;font-weight:600;cursor:pointer;transition:all .14s ease}.settings-cancel-btn:hover{border-color:#a09080;color:#3d2e22}.settings-apply-btn{flex:2;padding:11px;border:none;border-radius:10px;background:#ff66c4;color:#fff;font-size:13px;font-weight:700;cursor:pointer;box-shadow:0 4px 12px #f59e0b4d;transition:transform .14s ease,box-shadow .14s ease}.settings-apply-btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px #f50bab61}.analysis-square{background:#ab9585;border:1px solid rgba(255,255,255,.08);padding:18px;display:flex;flex-direction:column;gap:14px;box-shadow:0 18px 40px #00000038;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.analysis-header h2{margin:0;font-size:24px}.analysis-block{padding:14px;background:#fff;border:1px solid rgba(255,255,255,.06)}.analysis-kicker{display:block;margin-bottom:8px;font-size:12px;color:#000;text-transform:uppercase;letter-spacing:1px}.analysis-main{margin:0;font-size:22px;font-weight:700;color:#000}.rating-accent{color:#ff66c4}.analysis-subtext{margin:8px 0 0;color:#000;line-height:1.45;font-size:14px}@media(max-width:1100px){.app-shell{grid-template-columns:1fr;gap:24px}.left-column{max-width:none}.board-column{justify-content:center}.analysis-square{aspect-ratio:auto;min-height:360px}}.controls-wrap{width:280px}.analysis-wrap{width:495px}.checkmate-message{font-family:Lora,serif;margin:0 0 1rem;text-align:center;font-size:1.5rem;line-height:1.5;color:#000}.settings-title{text-align:center}.promotion-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.promotion-option-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:14px 10px;border:2px solid #d4c4b0;border-radius:10px;background:transparent;color:#3d2e22;cursor:pointer;transition:all .14s ease}.promotion-option-btn:hover{border-color:#ff66c4;color:#c0006e;background:#ff66c40f;transform:translateY(-1px)}.promotion-option-btn:active{transform:scale(.95)}.promotion-symbol{font-size:38px;line-height:1}.promotion-piece-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:#6b5c4e}.promotion-option-btn:hover .promotion-piece-label{color:#c0006e}@media(min-width:900px)and (max-width:1199px){.app-shell{grid-template-columns:360px 1fr;gap:36px;padding:28px}.controls-wrap{width:280px}.analysis-wrap{width:460px}.tutor-card{width:430px}.tutor-title{font-size:45px}.tutor-subtitle{font-size:16px}.tutor-image-box{width:190px}.control-navbar{width:100%}.board-shell{width:min(620px,100%);padding:12px}}@media(max-width:599px){.app-shell{grid-template-columns:1fr;gap:16px;padding:12px}.board-column{order:3;justify-content:center}.left-column{order:1}.board-shell{width:100%;padding:10px;border-radius:18px}.controls-wrap{width:100%;order:2}.analysis-wrap{width:100%;order:3}.tutor-card,.control-navbar{width:100%}.tutor-title{font-size:36px}.tutor-subtitle{font-size:14px}.tutor-image-box{width:140px}.analysis-square{padding:10px;gap:6px;min-height:0}.analysis-block{padding:8px}.analysis-header h2{font-size:16px}.analysis-kicker{font-size:10px;margin-bottom:2px}.analysis-main{font-size:15px;margin:0}.analysis-subtext{font-size:12px;margin:2px 0 0}}