:root{--text: #24293b;--text-strong: #1f2740;--muted: #5a6478;--hint: #777;--accent: #3562d6;--accent-ink: #33507d;--accent-soft: #eef3fc;--accent-border: #a9c2f0;--border: #c7d2e8;--border-soft: #e6eaf3;--surface: #fff;--surface-alt: #f6f8fc;--error: #b3261e;--error-bg: #fdecea;--square-dark: #b58863;--square-light: #f0d9b5;--frame: #8a5a2b;--amber: rgba(255, 183, 3, .45);--amber-strong: rgba(255, 183, 3, .75);--amber-border: #e0a800;--radius: 10px;--radius-lg: 18px;--shadow-card: 0 1px 2px rgba(15, 23, 42, .06), 0 10px 28px rgba(15, 23, 42, .08);--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", system-ui, sans-serif;--font-book: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, Cambria, "Times New Roman", serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font-ui);background:linear-gradient(160deg,#f4f7fc,#eef3fb 55%,#f6f9f4);background-attachment:fixed;min-height:100vh;color:var(--text)}#root{min-height:100vh}button,input,select{font-family:inherit}button{cursor:pointer}a{color:var(--accent)}.card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:24px 28px}.hint{color:var(--hint);font-size:.9rem}.error{color:var(--error);background:var(--error-bg);border-radius:var(--radius);padding:10px 12px}.splash{display:grid;place-items:center;min-height:60vh;color:var(--hint)}.big-btn{display:inline-block;font-size:1rem;font-weight:700;padding:12px 22px;border:none;border-radius:var(--radius);background:var(--accent);color:#fff;text-decoration:none;letter-spacing:.01em;box-shadow:0 2px 8px #3562d647;transition:transform .08s ease,box-shadow .15s ease}.big-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #3562d652}.big-btn:disabled{opacity:.5;cursor:default;box-shadow:none;transform:none}.big-btn.small{font-size:.9rem;padding:8px 16px}.nav-btn{display:inline-block;font-size:.9rem;font-weight:600;padding:9px 16px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--accent-ink);text-decoration:none;white-space:nowrap;transition:transform .08s ease,background .15s ease,border-color .15s ease}.nav-btn:hover:not(:disabled):not(.disabled){background:var(--accent-soft);border-color:var(--accent-border);transform:translateY(-1px)}.nav-btn:disabled,.nav-btn.disabled{opacity:.5;cursor:default}.nav-btn.small{font-size:.85rem;padding:6px 12px}.app-header{display:flex;align-items:center;gap:16px;min-height:56px;padding:8px 20px;background:#ffffffeb;border-bottom:1px solid var(--border-soft);box-shadow:0 1px 2px #0f172a0a}.brand{display:flex;align-items:center;gap:8px;color:var(--text-strong);font-weight:700;font-size:1.05rem;text-decoration:none;white-space:nowrap}.brand-icon{font-size:1.5rem;line-height:1;color:var(--frame)}.header-middle{flex:1;min-width:0}.header-user{display:flex;align-items:center;gap:10px}.username{font-weight:600;color:var(--muted);font-size:.9rem}.page-body{max-width:1040px;margin:0 auto;padding:24px 16px 48px}.page-title{font-size:1.6rem;margin:8px 0 20px}.crumbs{margin:0 0 14px;font-weight:600;font-size:.9rem}.crumbs a{text-decoration:none}.notice{text-align:center;max-width:520px;margin:40px auto}.login-page{min-height:100vh;display:grid;place-items:center;padding:16px}.login-card{width:min(100%,380px);display:flex;flex-direction:column;gap:14px;text-align:center}.login-card h1{margin:0;font-size:1.6rem}.login-icon{font-size:2.6rem;line-height:1;color:var(--frame)}.subtitle{margin:0;color:var(--muted)}.login-card label{display:flex;flex-direction:column;gap:6px;text-align:left;font-weight:600;font-size:.9rem;color:var(--muted)}.login-card input{font-size:1.05rem;padding:11px 13px;border:2px solid var(--border);border-radius:var(--radius);color:var(--text)}.login-card input:focus{outline:none;border-color:var(--accent)}.login-card .error{margin:0}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}.book-card{display:flex;flex-direction:column;background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden;transition:transform .1s ease,box-shadow .15s ease}.book-card:hover{transform:translateY(-2px);box-shadow:0 2px 4px #0f172a0f,0 14px 32px #0f172a1f}.book-card-open{display:flex;flex-direction:column;color:inherit;text-decoration:none;flex:1}.book-cover{width:100%;aspect-ratio:2 / 3;object-fit:cover;background:var(--surface-alt);display:block}.book-cover.placeholder,.book-hero-cover.placeholder{display:grid;place-items:center;font-size:4rem;color:var(--frame);background:linear-gradient(160deg,var(--square-light),#e2c49a)}.book-card-body{padding:14px 16px 6px}.book-card-title{margin:0 0 4px;font-size:1.05rem;line-height:1.3}.book-card-author{margin:0 0 4px;color:var(--muted)}.book-card-meta{margin:0;font-size:.82rem;color:var(--hint)}.continue-btn{margin:10px 16px 16px;text-align:center;font-size:.9rem;padding:10px 14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.book-hero{display:flex;gap:24px;align-items:flex-start;margin-bottom:20px}.book-hero-cover{width:150px;flex:none;aspect-ratio:2 / 3;object-fit:cover;border-radius:8px;box-shadow:0 4px 14px #0f172a2e}.book-hero-body{min-width:0}.book-hero h1{margin:0 0 6px;font-size:1.6rem}.book-hero .continue-btn{margin:16px 0 0;max-width:100%}.toc-title{margin:0 0 12px;font-size:1.1rem}.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.toc-list .toc-list{padding:4px 0 6px 20px}.toc-chapter{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;border-radius:var(--radius);color:var(--text);text-decoration:none;border:1.5px solid transparent}.toc-chapter:hover{background:var(--accent-soft);border-color:var(--accent-border)}.toc-chapter.last-read{background:#fff8e1;border-color:#ffd166}.toc-badge{flex:none;font-size:.72rem;font-weight:700;color:#8a5a00;background:#ffe08a;border-radius:999px;padding:2px 8px}.toc-part-head{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border:0;border-radius:var(--radius);background:var(--surface-alt);font:inherit;font-weight:700;text-align:left;color:var(--text-strong)}.toc-part-head:hover{background:var(--accent-soft)}.toc-caret{color:#7b87a8;width:1em}.toc-part-title{flex:1}.toc-count{font-size:.8rem;color:var(--hint);font-weight:600}.reader{height:100dvh;display:flex;flex-direction:column;overflow:hidden}.reader-status{padding:24px;text-align:center}.reader-nav{display:flex;align-items:center;gap:16px;min-width:0}.reader-book{font-weight:700;color:var(--accent-ink);text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;flex:0 1 auto}.reader-book:hover{text-decoration:underline}.reader-chapter-nav{display:flex;align-items:center;gap:8px;min-width:0;flex:1 1 auto}.chapter-select{min-width:0;flex:0 1 360px;font-size:.9rem;padding:6px 8px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text)}.reader-main{flex:1;min-height:0;width:100%;max-width:1560px;margin:0 auto;display:flex;gap:24px;padding:16px 20px}.board-column{--board-chrome: 216px;flex:none;width:min(54vw,760px,max(280px,calc(100dvh - var(--board-chrome))));display:flex;flex-direction:column}.board-area{width:100%}.board-wrap{width:100%;margin:0 auto;border-radius:10px;border:4px solid var(--frame);overflow:hidden;position:relative;transition:box-shadow .15s ease}.board-wrap.exploring{box-shadow:0 0 0 3px #7dc4ffcc}.promo-picker{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;background:#ffffffeb;font-size:1.1rem;font-weight:700;z-index:10}.promo-picker button{font-size:2rem;line-height:1;padding:8px 12px;border:2px solid var(--border);border-radius:var(--radius);background:var(--surface)}.promo-picker button:hover{background:#eaf3ff;transform:scale(1.08)}.promo-picker .promo-cancel{font-size:1rem;padding:8px 10px}.board-controls{display:flex;gap:8px;margin-top:12px;justify-content:center;align-items:center}.board-controls .nav-btn{padding:8px 14px}.move-indicator{min-width:110px;text-align:center;font-weight:600;font-size:.9rem;color:#4a5568;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.board-extras{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin-top:10px;min-height:40px;max-height:88px;overflow-y:auto}.chips{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.chip{font-size:.85rem;font-weight:600;padding:5px 12px;border-radius:999px;border:1px solid #cfe0ff;background:#eef4ff;color:#35507d;transition:background .15s ease,border-color .15s ease}.chip:hover{background:#dfeaff;border-color:var(--accent-border)}.board-hint{margin:0}.text-column{flex:1;min-width:0;overflow-y:auto;overscroll-behavior:contain;border-radius:var(--radius-lg)}.chapter-text{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:28px 36px;max-width:760px;font-family:var(--font-book);font-size:1.06rem;line-height:1.6}.chapter-title{font-family:var(--font-ui);font-size:1.5rem;margin:0 0 18px;color:var(--text-strong)}.chapter-text h2,.chapter-text h3,.chapter-text h4,.chapter-text h5{font-family:var(--font-ui);color:var(--text-strong);line-height:1.3;margin:1.4em 0 .5em}.chapter-text p{margin:0 0 .8em}.chapter-text .main-line{font-weight:700}.chapter-text .indent-1{margin-left:1.5em}.chapter-text .indent-2{margin-left:3em}.chapter-text .indent-3{margin-left:4.5em}.chapter-text .indent-4{margin-left:6em}.chapter-text .center{text-align:center}.chapter-text .caption{text-align:center;font-style:italic;font-size:.9em;color:var(--muted)}.chapter-text table{border-collapse:collapse;margin:0 0 1em}.chapter-text td,.chapter-text th{padding:4px 10px;border-bottom:1px solid var(--border-soft);text-align:left}.chapter-text blockquote{margin:0 0 1em;padding-left:1em;border-left:3px solid var(--border-soft);color:var(--muted)}.chapter-text hr{border:0;border-top:1px solid var(--border-soft);margin:1.5em 0}.move-ref{display:inline;font:inherit;color:var(--accent);background:none;border:0;padding:0 2px;margin:0 -2px;border-radius:4px;text-align:inherit;transition:background .12s ease}.move-ref:hover{background:var(--accent-soft);text-decoration:underline}.move-ref.current{color:var(--text-strong);background:var(--amber-strong);box-shadow:0 0 0 1px var(--amber-border);text-decoration:none}.internal-link{font-weight:600}.diagram{margin:1.2em auto;text-align:center}.diagram img{display:block;margin:0 auto;width:100%;max-width:320px;height:auto}.diagram-btn{display:block;width:min(100%,328px);margin:0 auto;padding:2px;background:none;border:2px solid transparent;border-radius:8px;transition:border-color .15s ease,transform .08s ease}.diagram-btn:hover{border-color:var(--accent-border);transform:translateY(-1px)}.diagram-btn.current{border-color:var(--amber-border);background:var(--amber)}.diagram figcaption{margin-top:6px;font-family:var(--font-ui);font-size:.85rem;color:var(--muted);font-style:italic}.game-card{margin:1.4em 0 1em;padding:14px 18px;border:1.5px solid var(--border-soft);border-radius:12px;background:var(--surface-alt);font-family:var(--font-ui);line-height:1.4}.game-card.active{border-color:#ffd166;background:#fffbef}.game-card p{margin:0 0 4px}.game-card-title{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#8a6a3a}.game-card-players{font-size:1.15rem;font-weight:700;color:var(--text-strong)}.game-card-meta{font-size:.9rem;color:var(--muted)}.game-card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px}.game-card-foot .big-btn{margin-left:auto}.game-card-result{font-weight:700;font-size:1rem;color:var(--text-strong)}.chapter-end{max-width:760px;padding:20px 0 28px;display:flex;justify-content:center}@media(max-width:760px){.app-header{padding:6px 10px;gap:10px;min-height:48px}.brand-name,.username{display:none}.reader-nav{gap:8px}.reader-book{display:none}.reader-chapter-nav{gap:6px}.reader-chapter-nav .nav-btn.small{padding:6px 8px}.chapter-select{flex:1 1 auto}.reader-main{flex-direction:column;gap:8px;padding:8px 8px 0}.board-column{width:min(100%,46dvh);align-self:center}.board-controls{margin-top:6px;gap:6px}.board-controls .nav-btn{padding:5px 12px}.board-extras{margin-top:6px;min-height:32px;max-height:64px}.board-extras .board-hint{display:none}.text-column{border-radius:12px 12px 0 0}.chapter-text{padding:18px 16px;border-radius:12px 12px 0 0;font-size:1rem}.chapter-text .indent-1{margin-left:1em}.chapter-text .indent-2{margin-left:2em}.chapter-text .indent-3{margin-left:3em}.chapter-text .indent-4{margin-left:4em}.book-hero{flex-direction:column;align-items:center;text-align:center}.card{padding:18px 16px}.book-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}}