@keyframes overlay-fade-out{0%{opacity:1}to{opacity:0}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;z-index:1000;animation:app-fade-in var(--dur-fast) ease-out}.modal-backdrop--closing{animation:overlay-fade-out var(--dur-fast) ease-in forwards;pointer-events:none}.modal{background:var(--surface);border-radius:var(--r-lg);border:1px solid var(--border);box-shadow:var(--shadow-modal);min-width:min(320px,calc(100vw - 32px));max-width:min(480px,calc(100vw - 32px));max-height:calc(100dvh - 32px);overflow:hidden;display:flex;flex-direction:column;animation:app-modal-in var(--dur-fast) ease-out}.modal--closing{animation:app-modal-out var(--dur-fast) ease-in forwards}.modal-backdrop--backgrounded{animation:overlay-fade-out var(--dur-fast) ease-in forwards;pointer-events:none}.modal--backgrounded{animation:app-modal-out var(--dur-fast) ease-in forwards;pointer-events:none}.modal-backdrop--foregrounding{animation:app-fade-in var(--dur-fast) ease-out}.modal--foregrounding{animation:app-modal-in var(--dur-fast) ease-out}.modal__header{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 12px}.modal__title{font-family:var(--font-display);font-size:17px;font-weight:600;color:var(--text);margin:0 12px 0 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.modal__close{display:flex;align-items:center;justify-content:center;flex-shrink:0;padding:6px;margin:-6px;background:transparent;border:none;border-radius:var(--r-sm);color:var(--text-muted);cursor:pointer;transition:color var(--dur-fast),background var(--dur-fast)}.modal__close:hover{color:var(--text);background:var(--surface-2)}.modal__content{padding:8px 20px 20px;overflow-y:auto;font-size:15px;color:var(--text-dim)}.modal__scroll{min-height:0;overflow-y:auto}.ov-body{position:relative;padding:34px 34px 26px;text-align:left}.ov-close{position:absolute;top:18px;right:18px;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:transparent;border:none;color:var(--text-faint);cursor:pointer;transition:color var(--dur-fast),background var(--dur-fast)}.ov-close:hover{color:var(--text);background:var(--surface-2)}@media(max-width:768px){.ov-body{padding:4px 0 12px}.ov-close{top:0;right:4px}}.modal__footer{flex-shrink:0;padding:16px;display:flex;align-items:center;justify-content:flex-end;gap:8px}:root:has(.drawer){view-transition-name:none}.drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);z-index:1000;animation:app-fade-in var(--dur-fast) ease-out}.drawer-backdrop--closing{animation:overlay-fade-out var(--dur-fast) ease-in forwards;pointer-events:none}.drawer{position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-radius:var(--r-xl) var(--r-xl) 0 0;box-shadow:var(--shadow-modal);z-index:1001;height:var(--drawer-height, 85dvh);max-height:var(--drawer-height, 92dvh);display:flex;flex-direction:column;transform:translateY(100%);transition:transform .3s cubic-bezier(.32,.72,0,1);will-change:transform;touch-action:pan-y;overflow:hidden}.drawer--closing{pointer-events:none}.drawer--dragging,.drawer--viewport-tracking{transition:none}.drawer-backdrop--backgrounded{animation:overlay-fade-out var(--dur-fast) ease-in forwards;pointer-events:none}.drawer--backgrounded{pointer-events:none}.drawer-backdrop--foregrounding{animation:app-fade-in var(--dur-fast) ease-out}.drawer__grabber{display:flex;justify-content:center;padding:16px 0;cursor:ns-resize;touch-action:none;flex-shrink:0;-webkit-user-select:none;user-select:none}.drawer__grabber-handle{width:36px;height:4px;background:var(--border-strong);border-radius:var(--r-pill)}.drawer__header{display:flex;align-items:center;justify-content:space-between;padding:4px 20px 12px;flex-shrink:0}.drawer__title{font-family:var(--font-display);font-size:16px;font-weight:600;color:var(--text);margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.drawer__content{padding:0 20px;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;touch-action:pan-y;min-height:0;font-size:15px;color:var(--text-dim)}.drawer__content--locked{overflow-y:hidden;touch-action:none}.drawer--dragging .drawer__content{overflow-y:hidden}.drawer__content-inner{display:block;padding-bottom:calc(12px + env(safe-area-inset-bottom,0px))}.drawer:has(.drawer__footer) .drawer__content-inner{padding-bottom:0}.drawer__footer{flex-shrink:0;padding:8px 20px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;gap:8px}.upm-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.05em;color:var(--accent);background:var(--accent-soft);padding:5px 11px;border-radius:var(--r-pill);margin-bottom:18px}.upm-title{font-family:var(--font-display);font-weight:600;font-size:25px;letter-spacing:-.02em;line-height:1.15;margin:0 0 8px;color:var(--text)}.upm-copy{font-size:15px;line-height:1.55;color:var(--text-dim);margin:0 0 20px}.upm-points{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-direction:column;gap:10px}.upm-point{display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--text)}.upm-point-check{flex-shrink:0;color:var(--accent)}.upm-billing{display:flex;gap:4px;background:var(--surface-3);padding:4px;border-radius:var(--r);margin-bottom:16px}.upm-seg{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px;border:none;border-radius:var(--r-sm);background:transparent;font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--text-muted);cursor:pointer;transition:background var(--dur-fast),color var(--dur-fast)}.upm-seg--active{background:var(--surface);color:var(--text);box-shadow:0 1px 2px #0f172014}.upm-seg-save{font-size:11px;font-weight:700;color:var(--accent);background:var(--accent-soft);padding:2px 6px;border-radius:var(--r-pill)}.upm-price{display:flex;align-items:baseline;gap:4px;margin-bottom:18px}.upm-price-amount{font-family:var(--font-display);font-weight:600;font-size:30px;letter-spacing:-.02em;color:var(--text)}.upm-price-period{font-size:15px;color:var(--text-muted)}.upm-price-sub{margin-left:auto;font-size:13px;color:var(--text-muted)}.upm-error{margin:0 0 10px;font-size:13px;color:var(--q-blunder)}.upm-cta{width:100%;padding:15px}.upm-learn{width:100%;margin-top:8px;padding:12px;background:none;border:none;font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--text-muted);cursor:pointer}.upm-learn:hover{color:var(--text-dim)}.pg-wrap{position:relative;aspect-ratio:1 / 1;container-type:size;box-sizing:border-box;user-select:none;-webkit-user-select:none;touch-action:none}.pg-board{position:absolute;top:0;right:0;bottom:0;left:0;background-color:var(--pg-light);background-image:repeating-conic-gradient(var(--pg-dark) 0 25%,var(--pg-light) 0 50%);background-size:25% 25%;cursor:pointer}.pg-view .pg-board{cursor:default}.pg-sq{position:absolute;top:0;left:0;width:12.5%;height:12.5%;pointer-events:none;z-index:0}.pg-last{background:#0c8a5729}.pg-selected{background:#0c8a5738}.pg-check{background:radial-gradient(ellipse at center,#ff0000e6,#e70000cc 25%,#a9000000 89%)}.pg-dest{background:radial-gradient(rgba(12,138,87,.32) 22%,transparent 24%)}.pg-mark{opacity:.5}.pg-piece{position:absolute;top:0;left:0;width:12.5%;height:12.5%;background-size:cover;z-index:2;pointer-events:none;will-change:transform;transition-property:transform,opacity;transition-timing-function:cubic-bezier(.25,.46,.35,1);transition-duration:0ms}.pg-piece.pg-dragging{z-index:11;cursor:grabbing;transition-duration:0ms}.pg-piece.pg-fade{opacity:0;z-index:1}.pg-piece.pg-ghost{opacity:.35;z-index:1}.pg-shapes{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none;overflow:visible;opacity:.8;z-index:3}.pg-coords{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:4}.pg-coord{position:absolute;top:0;left:0;width:12.5%;height:12.5%;display:flex;font-size:1.9cqmin;font-weight:700;line-height:1;text-transform:uppercase}.pg-coord-file{align-items:flex-end;justify-content:flex-start;padding:0 0 .5cqmin .6cqmin}.pg-coord-rank{align-items:flex-start;justify-content:flex-start;padding:.5cqmin 0 0 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0;padding:8px;text-align:center;font-size:13px;font-weight:600;color:var(--text-muted)}.up-cancel{margin-top:10px;padding:8px;background:none;border:none;font-family:var(--font-body);font-size:13px;font-weight:600;color:var(--text-muted);cursor:pointer}.up-trust{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:32px;font-size:13.5px;color:var(--text-muted)}.up-trust-dot{color:var(--border-strong)}:root[data-theme=dark] .up-plan--plus{border:1.5px solid var(--accent);color:var(--text)}:root[data-theme=dark] .up-feature-text--plus{color:var(--text-dim)}:root[data-theme=dark] .up-toggle--active{background:var(--surface-3);color:var(--text)}@media(max-width:860px){.up-container{padding:48px 24px 64px}.up-hero{margin-bottom:40px}.up-hero-title{font-size:36px}.up-hero-sub{font-size:16px}.up-preview-grid{grid-template-columns:repeat(2,1fr);margin-bottom:44px}.up-preview-card--col{grid-column:1 / -1}.up-infinity-wrap{padding:16px 0}}@media(max-width:560px){.up-container{padding:36px 16px 56px}.up-hero-title{font-size:30px}.up-preview-grid,.up-plans{grid-template-columns:1fr}.up-plan,.up-plan--plus{padding:26px 22px}.up-trust{flex-wrap:wrap;gap:8px 16px}}.lg-page{min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--font-body)}.lg-closebar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 32px;background:var(--surface)}.lg-brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:inherit}.lg-brand-name{font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:.02em}.lg-close{width:34px;height:34px;border-radius:100px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:18px;text-decoration:none}.lg-close:hover{background:var(--surface-2);color:var(--text)}.lg-container{max-width:720px;margin:0 auto;padding:56px 32px 80px}.lg-title{font-family:var(--font-display);font-weight:700;font-size:30px;letter-spacing:-.01em;margin:0 0 16px}.lg-placeholder{font-size:13px;font-weight:600;color:var(--text-dim);background:var(--surface-2);border:1px dashed var(--border-strong);border-radius:10px;padding:10px 14px;margin-bottom:28px}.lg-body{color:var(--text-dim);font-size:15px;line-height:1.7}.lg-body h2{font-family:var(--font-display);font-weight:700;font-size:18px;color:var(--text);margin:32px 0 8px}.lg-body p{margin:0 0 14px}.lg-body a{color:var(--accent);text-decoration:none;font-weight:600}.lg-body a:hover{color:var(--accent-hover);text-decoration:underline}.lic-title{font-family:var(--font-display);font-weight:700;font-size:30px;letter-spacing:-.01em;margin:0 0 12px}.lic-intro{color:var(--text-dim);font-size:15px;line-height:1.6;margin:0 0 32px}.lic-list{display:flex;flex-direction:column;gap:14px}.lic-card{border:1px solid var(--border);border-radius:14px;padding:18px 20px;background:var(--surface)}.lic-card-head{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}.lic-name{font-family:var(--font-display);font-weight:700;font-size:17px}.lic-version{font-size:13px;color:var(--text-muted)}.lic-badge{margin-left:auto;font-size:12px;font-weight:600;padding:3px 9px;border-radius:100px;background:var(--surface-2);color:var(--text-dim);border:1px solid var(--border-strong);white-space:nowrap}.lic-badge--copyleft{background:var(--accent-soft);color:var(--accent);border-color:transparent}.lic-desc{color:var(--text-dim);font-size:14px;line-height:1.55;margin:12px 0 14px}.lic-links{display:flex;gap:20px}.lic-links a{color:var(--accent);font-size:14px;font-weight:600;text-decoration:none}.lic-links a:hover{color:var(--accent-hover);text-decoration:underline}.lic-foot{margin-top:32px;color:var(--text-muted);font-size:13px;line-height:1.6}:root{--font-body: "Hanken Grotesk", system-ui, -apple-system, sans-serif;--font-display: "Space Grotesk", "Hanken Grotesk", sans-serif;--bg: #ffffff;--surface: #ffffff;--surface-2: #fafbfc;--surface-3: #f4f6f8;--border: #eef0f2;--border-strong: #dfe3e8;--border-faint: #f1f3f5;--text: #0f1720;--text-dim: #5a6573;--text-muted: #86909c;--text-faint: #aab2bd;--accent: #0c8a57;--accent-hover: #0a7a4d;--accent-soft: rgba(12, 138, 87, .1);--accent-soft-2: rgba(12, 138, 87, .06);--brand-spectrum-green: #0c8a57;--brand-spectrum-cyan: #35aed2;--brand-spectrum-blue: #6aa6ff;--brand-spectrum-purple: #b48bff;--brand-mark-green: #0c8a57;--q-good: #0c8a57;--q-inaccuracy: #b8862b;--q-mistake: #cc6b3a;--q-blunder: #cc4d44;--phase-openings: #0c8a57;--phase-structure: #2f8f8a;--phase-middlegame: #3b6fd0;--phase-tactics: #9a5bd0;--phase-endgame: #c0852a;--phase-technique: #cc6b3a;--flame: #cf6e22;--activity-0: var(--border);--activity-1: #bfe3d1;--activity-2: #6cc69a;--activity-3: var(--accent);--r-sm: 9px;--r: 12px;--r-md: 14px;--r-lg: 16px;--r-xl: 22px;--r-pill: 100px;--board-radius: 1.6%;--shadow-card: 0 1px 3px rgba(15, 23, 32, .05);--shadow-pop: 0 16px 40px -12px rgba(15, 23, 32, .4);--shadow-modal: 0 30px 70px -24px rgba(15, 23, 32, .5);--overlay: rgba(15, 23, 32, .45);--ink-panel: #0f1720;--ink-panel-2: #131c26;--pg-light: #f3e9cf;--pg-dark: #cda878;--dur-fast: .15s;--dur-normal: .2s;--dur-slow: .3s;--ease-out-quint: cubic-bezier(.22, 1, .36, 1);--ease-soft: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);color-scheme:light}:root[data-theme=dark]{color-scheme:dark;--bg: #181818;--surface: #161616;--surface-2: #1f1f1f;--surface-3: #272727;--border: #272727;--border-strong: #373737;--border-faint: #1e1e1e;--text: #ece9e5;--text-dim: #b2ada7;--text-muted: #8a857f;--text-faint: #6a655f;--accent: #1a9b62;--accent-hover: #20a96c;--accent-soft: rgba(26, 155, 98, .15);--accent-soft-2: rgba(26, 155, 98, .08);--brand-mark-green: #17a06b;--q-good: #2bb87b;--q-inaccuracy: #d8a544;--q-mistake: #e2854f;--q-blunder: #e46159;--flame: #e08842;--activity-1: #234a3a;--activity-2: #2a8a5f;--activity-3: var(--accent);--shadow-card: 0 1px 3px rgba(0, 0, 0, .4);--shadow-pop: 0 16px 40px -12px rgba(0, 0, 0, .6);--shadow-modal: 0 30px 70px -24px rgba(0, 0, 0, .7);--overlay: rgba(0, 0, 0, .6);--ink-panel: #161616;--ink-panel-2: #161616;--pg-light: #ecdcb8;--pg-dark: #c8a473}@keyframes app-fade-in{0%{opacity:0}to{opacity:1}}@keyframes app-pop-in{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}@keyframes app-pop-out{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.92)}}@keyframes app-modal-in{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes app-modal-out{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.95)}}.app-pop{animation:app-pop-in var(--dur-fast) var(--ease-out-quint) forwards}.app-pop--closing{animation:app-pop-out var(--dur-fast) var(--ease-out-quint) forwards;pointer-events:none}.app-backdrop{animation:app-fade-in var(--dur-fast) ease-out}.app-backdrop--closing{animation:app-fade-in var(--dur-fast) ease-in reverse forwards;pointer-events:none}.app-modal{animation:app-modal-in var(--dur-fast) ease-out}.app-modal--closing{animation:app-modal-out var(--dur-fast) ease-in forwards}::view-transition-old(root){animation:app-vt-exit var(--dur-fast) ease-out forwards}::view-transition-new(root){animation:app-vt-enter var(--dur-normal) var(--ease-out-quint) forwards}@keyframes app-vt-exit{to{opacity:0;transform:scale(.98)}}@keyframes app-vt-enter{0%{opacity:0;transform:scale(.98)}}::view-transition-group(topbar){animation:none}::view-transition-old(topbar){display:none}::view-transition-new(topbar){animation:none}::view-transition-group(board-morph){animation-duration:.36s;animation-timing-function:cubic-bezier(.32,.72,0,1)}::view-transition-old(board-morph){animation:none}::view-transition-new(board-morph){animation:none;opacity:0}@media(prefers-reduced-motion:reduce){::view-transition-old(root),::view-transition-new(root),::view-transition-group(board-morph),::view-transition-old(board-morph),::view-transition-new(board-morph){animation:none!important}.app-pop,.app-pop--closing,.app-modal,.app-backdrop{animation-duration:.001ms!important}}*{box-sizing:border-box}html{scrollbar-gutter:stable}html:has(.login-page),html:has(.ld-page),html:has(.ob-root){scrollbar-gutter:auto}@media(max-width:600px){html{scrollbar-gutter:auto}}html:has(.ld-page){overflow-x:clip}html,body{margin:0;background:var(--bg)}body{font-family:var(--font-body);color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{text-decoration:none;color:inherit}button{font-family:inherit}.display{font-family:var(--font-display);letter-spacing:-.02em}.num{font-family:var(--font-display);font-variant-numeric:tabular-nums}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-size:15px;font-weight:600;border:none;border-radius:var(--r);cursor:pointer;transition:background var(--dur-fast) ease,border-color var(--dur-fast) ease,color var(--dur-fast) ease,box-shadow var(--dur-normal) ease,transform var(--dur-normal) ease;white-space:nowrap}.btn:active:not(:disabled){transform:scale(.97);transition-duration:60ms}.btn:disabled{opacity:.55;cursor:default}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-lg:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-card)}@media(prefers-reduced-motion:reduce){.btn:active:not(:disabled),.btn-lg:hover:not(:disabled){transform:none}}.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--border-strong)}.btn-ghost:hover{background:var(--surface-3)}.btn-lg{font-size:17px;padding:16px 36px;border-radius:13px}.btn-md{font-size:15px;padding:13px 26px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card)}.eyebrow{font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--accent)}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);font-weight:600}.center-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:16px;color:var(--text-dim);padding:24px;text-align:center}.spinner{width:30px;height:30px;border-radius:50%;border:3px solid var(--border-strong);border-top-color:var(--accent);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes stepin{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes fbin{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}input[type=range].app-range{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;border-radius:var(--r-pill);background:var(--surface-3);outline:none}input[type=range].app-range::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:26px;height:26px;border-radius:var(--r-pill);background:var(--accent);border:4px solid var(--surface);box-shadow:0 2px 6px #0c8a5766;cursor:pointer}input[type=range].app-range::-moz-range-thumb{width:22px;height:22px;border-radius:var(--r-pill);background:var(--accent);border:4px solid var(--surface);box-shadow:0 2px 6px #0c8a5766;cursor:pointer}