:root{--sh-bg-primary: #2d1b4e;--sh-bg-secondary: #1a1a2e;--sh-bg-surface: #3d2a5e;--sh-border: #6b4aa3;--sh-accent: #ffd700;--sh-accent-hover: #ffb300;--sh-text-primary: #ffffff;--sh-text-secondary: #c9a0dc;--sh-text-muted: #8a6fb0;--sh-success-bg: #1a472a;--sh-success-border: #4ade80;--sh-success-text: #4ade80;--sh-error-bg: #4a1a1a;--sh-error-border: #ff6b6b;--sh-error-text: #ff6b6b;--sh-warning-bg: #4a3a1a;--sh-warning-border: #ffd700;--sh-warning-text: #ffd700;--sh-font-display: "Bungee", Impact, sans-serif;--sh-font-heading: "Space Grotesk", sans-serif;--sh-font-body: "DM Sans", "Segoe UI", Arial, sans-serif;--sh-weight-display: 700;--sh-weight-heading: 600;--sh-weight-body: 400;--sh-transform-display: none;--sh-transform-heading: none;--sh-transform-body: none;--sh-radius-sm: 8px;--sh-radius-md: 12px;--sh-radius-lg: 16px;--sh-radius-xl: 20px;--sh-shadow-card: 0 4px 20px rgba(0, 0, 0, .3);--sh-shadow-glow: 0 0 40px rgba(107, 74, 163, .4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--sh-font-body);background:var(--sh-bg-secondary);color:var(--sh-text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}.sh-card{background:linear-gradient(135deg,var(--sh-bg-primary) 0%,var(--sh-bg-secondary) 100%);border:2px solid var(--sh-border);border-radius:var(--sh-radius-lg);padding:24px;box-shadow:var(--sh-shadow-card)}.sh-title{font-family:var(--sh-font-display);font-weight:var(--sh-weight-display);text-transform:var(--sh-transform-display);color:var(--sh-accent);text-shadow:0 2px 4px rgba(0,0,0,.5)}.sh-subtitle{font-family:var(--sh-font-heading);font-weight:var(--sh-weight-heading);text-transform:var(--sh-transform-heading);color:var(--sh-text-secondary)}.sh-btn{padding:10px 24px;font-size:14px;font-weight:var(--sh-weight-heading);font-family:var(--sh-font-body);border:none;border-radius:var(--sh-radius-sm);cursor:pointer;transition:all .15s ease;text-decoration:none;display:inline-flex;align-items:center;gap:8px}.sh-btn-primary{background:linear-gradient(135deg,gold,#ffb300);color:#1a1a2e}.sh-btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px #ffd70066}.sh-btn-secondary{background:#ffffff14;color:var(--sh-text-secondary);border:1px solid rgba(107,74,163,.4)}.sh-btn-secondary:hover{background:#ffffff1f}.sh-btn-danger{background:linear-gradient(135deg,#f44,#c00);color:#fff}.sh-btn-danger:hover{transform:translateY(-1px);box-shadow:0 4px 12px #f446}.sh-input{width:100%;padding:10px 14px;font-size:15px;font-family:var(--sh-font-body);border:2px solid var(--sh-border);border-radius:var(--sh-radius-sm);background:#ffffff0f;color:var(--sh-text-primary);outline:none;transition:border-color .15s}.sh-input:focus{border-color:var(--sh-accent);box-shadow:0 0 8px #ffd70033}.sh-label{display:block;font-size:13px;font-weight:var(--sh-weight-heading);color:var(--sh-text-secondary);margin-bottom:6px}.sh-badge{display:inline-block;padding:3px 10px;font-size:11px;font-weight:var(--sh-weight-display);border-radius:20px;text-transform:var(--sh-transform-display);letter-spacing:.5px}.sh-badge-gold{background:#ffd70026;color:var(--sh-accent)}.sh-badge-green{background:#4ade8026;color:var(--sh-success-text)}.sh-badge-red{background:#ff6b6b26;color:var(--sh-error-text)}.sh-icon{display:inline-block;vertical-align:middle;flex-shrink:0}.sh-icon.spin{animation:sh-spin 1s linear infinite}@keyframes sh-spin{to{transform:rotate(360deg)}}:root{--app-bg: #1a0f2e;--app-surface: #2a1a4a;--app-surface-2: #332258;--app-text: #f3e8d6;--app-text-dim: #b8a890;--app-accent: #d4af37;--app-border: #4a3a6a;--app-radius: 10px;--app-danger: #ff7b7b;--app-ok: #6ee7a0;--sq-light: #e9dcc0;--sq-dark: #8a6fb0;--sq-last: rgba(212, 175, 55, .45);--sq-sel: rgba(212, 175, 55, .7);--sq-check: radial-gradient(circle, rgba(255, 70, 70, .9) 0%, rgba(255, 70, 70, 0) 75%);--piece-w-fill: #fbf6ea;--piece-w-line: #2a1a4a;--piece-b-fill: #241640;--piece-b-line: #f3e8d6}*{box-sizing:border-box}html,body{margin:0;background:var(--app-bg);color:var(--app-text);font-family:DM Sans,system-ui,sans-serif;min-height:100vh}a{color:var(--app-accent)}h1{font-size:1.5rem;margin:0 0 12px}h2{font-size:1.1rem;margin:0 0 8px}h3{font-size:1rem;margin:0 0 4px}.dim{color:var(--app-text-dim)}.small{font-size:13px}[hidden]{display:none!important}.app-header{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--app-border)}.brand{font-weight:800;font-size:20px;letter-spacing:.04em;color:var(--app-text);text-decoration:none}.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}.nav a{color:var(--app-text-dim);text-decoration:none;padding:6px 10px;border-radius:8px;font-size:14px}.nav a[aria-current=page],.nav a:hover{color:var(--app-text);background:var(--app-surface)}.container{padding:20px 16px 48px;max-width:820px;margin:0 auto}.loading{color:var(--app-text-dim)}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:8px;border:1px solid var(--app-border);background:var(--app-surface);color:var(--app-text);font:inherit;font-size:14px;cursor:pointer;text-decoration:none}.btn:hover{background:var(--app-surface-2)}.btn:disabled{opacity:.5;cursor:default}.btn.primary{background:var(--app-accent);border-color:var(--app-accent);color:#1a0f2e;font-weight:600}.btn.primary:hover{filter:brightness(1.08)}.btn.danger{color:var(--app-danger)}.btn.ghost{background:none;border-color:transparent;padding-left:0;color:var(--app-text-dim)}.btn.small{padding:5px 10px;font-size:13px}.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:8px;border:0;background:none;color:var(--app-text-dim);cursor:pointer}.icon-btn:hover{background:var(--app-surface);color:var(--app-text)}.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}select,input{padding:9px 10px;border-radius:8px;border:1px solid var(--app-border);background:var(--app-bg);color:var(--app-text);font:inherit;font-size:14px}.field{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--app-text-dim)}.field.inline{flex-direction:row;align-items:center;gap:8px}.form{display:flex;flex-direction:column;gap:10px}.form.row{flex-direction:row}.form-msg{margin:6px 0 0;font-size:13px;min-height:1em}.form-msg.ok{color:var(--app-ok)}.form-msg.err{color:var(--app-danger)}.card{background:var(--app-surface);border:1px solid var(--app-border);border-radius:var(--app-radius);padding:18px;margin-bottom:16px}.tag{display:inline-block;margin-left:6px;padding:1px 6px;border-radius:999px;background:var(--app-surface-2);color:var(--app-text-dim);font-size:11px;vertical-align:middle}[data-tip]{position:relative}[data-tip]:hover:after,[data-tip]:focus-visible:after{content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%);white-space:nowrap;padding:4px 8px;border-radius:6px;background:#000c;color:#fff;font-size:12px;pointer-events:none;z-index:10}.new-options{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}.opt{background:var(--app-bg);border:1px solid var(--app-border);border-radius:8px;padding:14px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}.opt p{margin:0}@media (max-width: 560px){.new-options{grid-template-columns:1fr}}.list{margin:22px 0}.list ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.count{color:var(--app-text-dim);font-weight:400;font-size:14px}.game-row{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--app-surface);border:1px solid var(--app-border);border-radius:8px;color:var(--app-text);text-decoration:none}.game-row:hover{border-color:var(--app-accent)}.g-main{flex:1;display:flex;flex-direction:column;min-width:0}.g-opp{font-weight:600}.g-meta{color:var(--app-text-dim);font-size:13px}.swatch{display:inline-block;width:14px;height:14px;border-radius:4px;border:1px solid var(--app-border);flex:none}.swatch.w{background:var(--piece-w-fill)}.swatch.b{background:var(--piece-b-fill);border-color:var(--app-text-dim)}.swatch.to-move{box-shadow:0 0 0 2px var(--app-accent)}.board-wrap{width:100%;max-width:min(560px,calc(100vh - 220px));min-width:260px;margin:0 auto}.board{position:relative;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);aspect-ratio:1;border-radius:6px;overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:none;box-shadow:0 6px 24px #0006}.sq{position:relative;min-width:0;min-height:0;overflow:hidden}.sq.light{background:var(--sq-light)}.sq.dark{background:var(--sq-dark)}.sq.last:before,.sq.selected:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--sq-last)}.sq.selected:before{background:var(--sq-sel)}.sq.check{background-image:var(--sq-check)}.sq.own{cursor:grab}.sq.target:after{content:"";position:absolute;left:35%;top:35%;width:30%;height:30%;border-radius:50%;background:#1a0f2e59;pointer-events:none}.sq.target.capture:after{left:4%;top:4%;width:92%;height:92%;box-sizing:border-box;background:none;border:4px solid rgba(26,15,46,.4)}.sq.target{cursor:pointer}.piece{position:absolute;left:6%;top:6%;width:88%;height:88%;z-index:1;pointer-events:none;transition:transform .08s}.piece.dragging{z-index:5;transition:none;filter:drop-shadow(0 6px 6px #0007)}.piece path,.piece circle{stroke-width:1.5;stroke-linejoin:round;stroke-linecap:round}.piece-w path,.piece-w circle{fill:var(--piece-w-fill);stroke:var(--piece-w-line)}.piece-b path,.piece-b circle{fill:var(--piece-b-fill);stroke:var(--piece-b-line)}.piece .line{fill:none!important}.piece-w .eye{fill:var(--piece-w-line);stroke:none}.piece-b .eye{fill:var(--piece-b-line);stroke:none}.coord{position:absolute;font-size:10px;font-weight:700;z-index:2;pointer-events:none}.coord.f{right:3px;bottom:1px}.coord.r{left:3px;top:1px}.sq.light .coord{color:var(--sq-dark)}.sq.dark .coord{color:var(--sq-light)}.promo{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;display:grid;place-items:center;background:#000a}.promo-card{background:var(--app-surface);border-radius:10px;padding:12px;text-align:center}.promo-card p{margin:0 0 8px}.promo-row{display:flex;gap:6px}.promo-row button{width:56px;height:56px;padding:4px;border-radius:8px;border:1px solid var(--app-border);background:var(--sq-light);cursor:pointer}.promo-row .piece{width:100%;height:100%}.promo-cancel{margin-top:8px;background:none;border:0;color:var(--app-text-dim);cursor:pointer;font:inherit}.play{padding:12px 16px 32px;max-width:1000px;margin:0 auto}.table{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:20px;align-items:start}@media (max-width: 760px){.table{grid-template-columns:1fr}}.board-col{display:flex;flex-direction:column;gap:8px}.player{display:flex;align-items:center;gap:8px;min-height:28px;max-width:min(560px,calc(100vh - 220px));width:100%;margin:0 auto}.pname{font-weight:600}.status{font-size:1.05rem;font-weight:600;margin:0 0 4px}.controls{margin:12px 0}.draw-offer{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px;border:1px solid var(--app-accent);border-radius:8px;margin:8px 0}.moves{list-style:none;padding:0;margin:0;max-height:40vh;overflow-y:auto;font-variant-numeric:tabular-nums}.moves li{display:grid;grid-template-columns:32px 1fr 1fr;padding:3px 6px;font-size:14px}.moves li:nth-child(odd){background:var(--app-surface);border-radius:4px}.moves .n{color:var(--app-text-dim)}.join{max-width:560px;margin:0 auto 16px}.join p{margin:0 0 10px}.join .field{margin-bottom:10px}.flash{position:fixed;left:50%;bottom:24px;transform:translate(-50%);background:var(--app-surface-2);border:1px solid var(--app-border);padding:10px 16px;border-radius:8px;z-index:50;max-width:calc(100% - 32px)}.table-wrap{overflow-x:auto}.leaderboard{width:100%;border-collapse:collapse}.leaderboard th,.leaderboard td{padding:10px 8px;text-align:left;border-bottom:1px solid var(--app-border)}.leaderboard th{color:var(--app-text-dim);font-weight:600;font-size:13px}.leaderboard .num{text-align:right;font-variant-numeric:tabular-nums}.leaderboard .rank{width:36px;color:var(--app-text-dim)}.leaderboard .ratio{font-weight:700;color:var(--app-accent)}.people{list-style:none;padding:0;margin:0}.people li{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--app-border)}.group{margin:22px 0}.group p{margin:0 0 10px}.ideas{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}.idea-card{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:14px;border-radius:8px;border:1px solid var(--app-border);background:var(--app-surface);color:var(--app-text);font:inherit;text-align:left;cursor:pointer}.idea-card:hover{border-color:var(--app-accent)}.idea-card.done{border-color:var(--app-ok)}.idea-title{font-weight:700}.idea-meta{display:inline-flex;gap:4px;align-items:center;color:var(--app-text-dim);font-size:13px}.lesson .idea-text{line-height:1.55}.lesson .when{color:var(--app-text-dim);font-size:14px}.scenario-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0 10px}.chip{display:inline-flex;align-items:center;gap:4px;padding:5px 12px;border-radius:999px;border:1px solid var(--app-border);background:var(--app-surface);color:var(--app-text-dim);font:inherit;font-size:13px;cursor:pointer}.chip.active{color:var(--app-text);border-color:var(--app-accent)}.chip.solved{color:var(--app-ok)}.prompt{font-weight:600}.lesson .board-wrap{max-width:min(480px,calc(100vh - 260px))}.feedback{min-height:1.4em;margin:12px 0}.feedback.ok{color:var(--app-ok)}.feedback.miss{color:var(--app-danger)}.feedback.hint{color:var(--app-accent)}.login-page{display:grid;place-items:center;min-height:100vh;padding:16px}.login-container{width:100%;max-width:360px;padding:32px;background:var(--app-surface);border-radius:var(--app-radius)}.login-title{text-align:center;margin:0 0 24px}.login-form{display:flex;flex-direction:column;gap:12px}.login-label{display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--app-text-dim)}.login-label input{padding:10px;border-radius:6px;border:1px solid var(--app-border);background:var(--app-bg);color:var(--app-text);font:inherit}.login-error{color:#ff6b6b;min-height:1em;margin:0;font-size:13px}.login-button{padding:12px;border:none;border-radius:6px;background:var(--app-accent);color:#1a0f2e;font-weight:600;cursor:pointer}.toggle-link{display:block;text-align:center;margin-top:16px;color:var(--app-text-dim);font-size:13px;line-height:1.5}.divider{text-align:center;color:var(--app-text-dim);margin:12px 0;font-size:13px}