@import "https://fonts.googleapis.com/css2?family=Balsamiq+Sans&display=swap";
:root{--font-ui:"Balsamiq Sans",cursive;--font-sketch:"Balsamiq Sans",cursive;--header-height:4.55rem;--training-board-size:560px;--move-list-body-height:calc(var(--training-board-size)*.85);--logo-blue:#2ea4ff;--logo-red:#a22020;--logo-light:#f6f6f6;--logo-cream:bisque;--logo-bg:#1a1918;--ink:#f6f6f6;--ink-muted:#f6f6f6b8;--ink-faint:#f6f6f67a;--bg-deep:#1a1918;--bg-page:radial-gradient(120% 90% at 50% 0%,#222120 0%,#1a1918 55%,#141312 100%);--surface:#ffffff0f;--surface-raised:#2c2b2a;--surface-active:#333231;--explanation-tooltip-bg:#333231;--line:#ffe4c459;--line-strong:var(--logo-red);--accent:var(--logo-red);--accent-soft:#a2202038;--gold:var(--logo-cream);--gold-soft:#ffe4c433;--sketch-shadow:3px 3px 0 #00000059;--sketch-radius:8px 4px 6px 10px;--btn-radius:18px 9px 22px 11px/11px 22px 10px 16px;--btn-radius-lg:26px 12px 30px 16px/15px 28px 14px 20px;--btn-sketch-ring:0 0 0 2px #a22020eb,2px -1px 0 0 #a2202094,-2px 2px 0 0 #a2202085,-3px -2px 0 0 #a2202057,3px 2px 0 0 #a220204d,1px 2px 0 0 #a2202038,-2px -1px 0 0 #a2202061,0 2px 0 0 #a220202e;--btn-sketch-ring-lg:0 0 0 2px #a22020eb,3px -2px 0 0 #a220208c,-3px 3px 0 0 #a220207a,-4px -3px 0 0 #a2202052,4px 3px 0 0 #a2202047,2px 3px 0 0 #a2202038,-2px -3px 0 0 #a2202042,0 3px 0 0 #a2202033,-3px 0 0 0 #a2202029,3px 0 0 0 #a2202024;--btn-sketch-ring-primary:0 0 0 2px #7a1818,2px -2px 0 0 #7a1818e0,-2px 2px 0 0 #c83030ad,0 0 0 1px #ffffff1f inset,3px 1px 0 0 #5a141461,-1px -3px 0 0 #8c282847;--btn-sketch-ring-primary-lg:0 0 0 2px #7a1818,3px -3px 0 0 #7a1818d9,-3px 3px 0 0 #c83030a6,0 0 0 1px #ffffff1f inset,4px 2px 0 0 #5a141459,-2px -4px 0 0 #8c282842,2px 4px 0 0 #3c0f0f38;--btn-sketch-ring-blue:0 0 0 2px #2ea4ffe6,2px -2px 0 0 #2ea4ff94,-2px 2px 0 0 #2ea4ff7a,-2px -3px 0 0 #2ea4ff47,3px 2px 0 0 #2ea4ff38;--btn-sketch-ring-muted:0 0 0 2px #ffe4c461,2px -1px 0 0 #ffe4c43d,-2px 2px 0 0 #a220205c,-1px -2px 0 0 #ffe4c42e;--font-main:var(--font-ui);--text-color-main:var(--ink);--text-color-header:var(--logo-red);--text-color-highlight:var(--gold);--text-color-link:#f0a8a8;--bg-main:var(--bg-deep);--bg-button:var(--surface-raised);--bg-small-button:var(--surface);--bg-hover:#2a2928;--bg-active:#323130;--bg-dropdown:var(--surface);--bg-highlight:#a2202047;--bg-last-move:#ffe4c459;--bg-can-move:#a2202038;--bg-premove:#a2202026;--border-soft:2px solid var(--line);--border-strong:2px solid var(--line-strong);--border-muted:1px solid #ffe4c440;--border-danger:2px solid var(--logo-red);--box-shadow-soft:var(--sketch-shadow);--box-shadow-strong:4px 4px 0 #00000073;--box-shadow-glow:0 0 0 2px var(--accent-soft);--box-shadow-heavy:5px 5px 0 #00000059;--box-shadow-error:var(--logo-red)0 0 0 2px;--focus-ring:0 0 0 3px #a220208c,0 0 0 5px #f6f6f61f;--white-square:bisque;--black-square:#6b4528;--eval-best:#4ade80;--eval-mid:#facc15;--eval-bad:#fb923c;--eval-worst:#ef4444;--eval-on-cream:#2a1a10}
*,:before,:after{box-sizing:border-box}html{-webkit-font-smoothing:antialiased;background-color:var(--bg-deep);overscroll-behavior-y:none}body{min-height:100vh;font-family:var(--font-ui);color:var(--ink);background:var(--bg-page);background-color:var(--bg-deep);overscroll-behavior-y:none;margin:0;font-size:16px;line-height:1.5}main{min-height:calc(100vh - var(--header-height))}a{color:var(--text-color-link)}a:hover{text-decoration:underline}a.practice-box:hover,a.time-box:hover,a.btn:hover,a.buy-coffee:hover,a.logo-container:hover,a.dropdown-item:hover,a.leaderboard-player-link:hover,a.notification-card__link:hover,button:hover,.btn:hover,.dropbtn:hover,.leaderboard-cat-btn:hover{text-decoration:none}code{font-family:ui-monospace,monospace;font-size:.9em}button:focus-visible{outline:none}input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--logo-red);outline-offset:2px}input,textarea,[contenteditable]{caret-color:var(--ink)}#fullScreenLoadingOverlay{z-index:9999;color:var(--ink);text-align:center;background:#000000bf;justify-content:center;align-items:center;font-size:1.5rem;display:none;position:fixed;inset:0}#fullScreenLoadingOverlay .loader{margin-bottom:1rem}
header{background:var(--surface);box-shadow:var(--sketch-shadow);height:var(--header-height);min-height:var(--header-height);border-bottom:2px solid #a2202073;justify-content:space-between;align-items:center;padding:.5rem 1rem;display:flex;position:relative}.logo-container{align-items:center;gap:.5rem;height:100%;margin:.5rem 0;text-decoration:none;display:flex;position:absolute;left:50%;overflow:visible;transform:translate(-50%)}.logo-img{object-fit:contain;width:4.5rem;height:3.5rem}.logo-text{color:var(--text-color-header);font-size:2.25rem;font-family:var(--font-sketch);text-align:center;letter-spacing:.02em;align-items:center;height:100%;font-weight:700;line-height:1;text-decoration:none;display:flex}.dropdown{z-index:60;display:inline-block;position:relative}.header-dropdown-wrap{z-index:60;position:absolute;top:50%;right:1rem;transform:translateY(-50%)}.dropbtn{color:var(--ink);border-radius:var(--btn-radius);cursor:pointer;white-space:nowrap;min-height:2.4rem;font-size:.98rem;font-weight:500;font-family:var(--font-ui);background:0 0;border:2px solid #0000;justify-content:center;align-items:center;gap:.45rem;padding:.5rem .7rem;transition:background .15s,border-color .15s;display:inline-flex}.dropbtn:hover{box-shadow:var(--btn-sketch-ring);background:#ffffff0d}.dropbtn:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-muted)}.dropbtn-label{text-overflow:ellipsis;max-width:9.5rem;overflow:hidden}.dropbtn-chevron{opacity:.75;font-size:.72rem;line-height:1}.dropdown-content{background:var(--surface);border:var(--border-soft);border-radius:var(--sketch-radius);min-width:min(220px,86vw);box-shadow:var(--box-shadow-heavy);padding:.35rem 0;position:absolute;top:calc(100% + 6px);right:0;overflow:hidden}.dropdown-section{padding:.25rem 0}.dropdown-section+.dropdown-section{border-top:1px solid var(--line)}.dropdown-section-title{letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);font-size:.65rem;font-weight:700;font-family:var(--font-ui);padding:.45rem .85rem .2rem}.dropdown-section:first-child .dropdown-section-title{padding-top:.2rem}.dropdown-item{box-sizing:border-box;text-align:left;width:100%;color:var(--ink);font-family:var(--font-ui);cursor:pointer;background:0 0;border:none;padding:.45rem .85rem;font-size:.92rem;font-weight:500;text-decoration:none;transition:background .12s;display:block}.dropdown-item:hover{background:var(--bg-hover);color:var(--ink)}.dropdown-item--with-notify{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.notification-pip{background:radial-gradient(circle at 38% 36%,#ff5c5c,var(--logo-red)65%);border-radius:55% 45% 48% 52%/50% 52% 46% 54%;flex-shrink:0;width:10px;height:10px;transform:rotate(-12deg);box-shadow:0 0 0 1px #0000004d,inset -1px -1px #ffffff1f}.dropdown-section--footer{border-top:1px solid var(--line);margin-top:.15rem;padding-top:.35rem}.dropdown-item--signout{color:#f6f6f6eb}.dropdown-item--signout:hover{color:var(--logo-light);background:#a2202059}.buy-coffee{border-radius:var(--btn-radius-lg);color:var(--ink);font-weight:600;font-family:var(--font-ui);box-shadow:none;letter-spacing:.02em;cursor:pointer;background:0 0;border:2px solid #0000;align-items:center;gap:.55rem;margin-top:.2rem;padding:.55rem 1.1rem;text-decoration:none;transition:background .15s,border-color .15s,box-shadow .15s;display:inline-flex}.buy-coffee:hover{box-shadow:var(--btn-sketch-ring-lg);color:var(--ink);background:#ffffff0d}.buy-coffee:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-muted)}.coffee-icon{color:var(--logo-red);font-size:1.25rem}.header-buy-coffee{position:absolute;top:50%;left:1rem;transform:translateY(-50%)}.header-buy-coffee.buy-coffee{margin-top:0}.header-buy-coffee.buy-coffee:hover{transform:translateY(-50%)}.page-shell{max-width:1180px;margin:0 auto;padding:1.25rem 1rem 2rem}.page-shell--narrow{max-width:760px}.page-shell--auth{max-width:460px;margin:8vh auto;padding:0 1rem}.page-shell--notifications{max-width:980px}.page-shell--center{flex-direction:column;align-items:center;margin-top:4rem;padding:0 1rem;display:flex}.page-shell--mock{max-width:1100px;margin:0 auto;padding:2rem 1rem 3rem}.page-shell--mock-inner{max-width:1000px;margin:0 auto}.play{text-align:center;margin:2rem auto}.practice{text-align:center;margin:2rem}.practice .section-title,.play .section-title{margin-bottom:.75rem}.section-title__heading--home{margin:2rem 0 1rem}.practice-grid{flex-wrap:wrap;justify-content:center;gap:2rem;display:flex}.practice-card{width:300px;max-width:100%;position:relative}.practice-card__explain{z-index:3;position:absolute;top:1rem;right:1rem}.practice-box{background:var(--surface);border-radius:var(--btn-radius-lg);text-align:center;width:300px;max-width:100%;min-height:6.5rem;color:var(--ink);box-shadow:var(--btn-sketch-ring-lg),var(--sketch-shadow);border:none;flex-direction:column;justify-content:center;align-items:center;padding:2rem;text-decoration:none;transition:transform .15s,box-shadow .15s;display:flex}.practice-box:hover{background:var(--bg-hover);box-shadow:var(--btn-sketch-ring-lg),5px 5px 0 #00000073;transform:translate(-1px,-1px)}.practice-box:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-lg),var(--sketch-shadow)}.practice-box h3{font-size:1.65rem;font-family:var(--font-sketch);color:var(--ink);align-items:center;gap:.4rem;margin:0;display:flex}.practice-desc{margin-bottom:auto;font-size:.95rem;line-height:1.4}.emphasis{color:var(--text-color-link);font-weight:600}.tiny-note{color:var(--ink-muted);margin-top:auto;font-size:.75rem;font-style:italic}.time-grid{grid-template-columns:repeat(4,1fr);justify-content:center;gap:.75rem;max-width:500px;margin:1rem auto;display:grid}.time-grid a{background:var(--surface);border-radius:var(--btn-radius);box-shadow:var(--btn-sketch-ring),var(--sketch-shadow);color:var(--ink);aspect-ratio:1;border:none;flex-direction:column;justify-content:center;align-items:center;padding:1rem;font-size:1.5rem;font-weight:700;text-decoration:none;transition:background .15s,transform .1s;display:flex}.time-grid a small{color:var(--ink-muted);margin-top:.2rem;font-size:1rem;font-weight:500}.time-grid a:hover{background:var(--bg-hover);box-shadow:var(--btn-sketch-ring-lg),4px 4px 0 #0000006b;transform:translate(-1px,-1px)}.time-grid a:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-lg),var(--sketch-shadow)}.time-box{background:var(--surface)}@media (max-width:768px){.time-grid{grid-template-columns:repeat(2,1fr)}.practice-card,.practice-box{width:100%}}
.btn{font-size:1rem;font-family:var(--font-ui);background:var(--surface-raised);color:var(--ink);border-radius:var(--btn-radius);cursor:pointer;--btn-ring:var(--btn-sketch-ring);box-shadow:var(--btn-ring),var(--sketch-shadow);border:none;padding:.65rem 1.35rem;font-weight:600;text-decoration:none;transition:background .15s,box-shadow .15s,opacity .15s}.btn:hover:not(:disabled){background:var(--bg-hover);box-shadow:var(--btn-ring),var(--sketch-shadow)}.btn:active:not(:disabled){box-shadow:var(--btn-ring),1px 1px 0 #0000006b}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:focus-visible{box-shadow:var(--focus-ring),var(--btn-ring),var(--sketch-shadow)}.btn--primary{--btn-ring:var(--btn-sketch-ring-primary);background:var(--logo-red);color:var(--logo-light)}.btn--primary:hover:not(:disabled){background:#b82828}.btn--success{--btn-ring:var(--btn-sketch-ring-blue);color:var(--logo-light);background:#2ea4ff38}.btn--muted{--btn-ring:var(--btn-sketch-ring-muted);background:var(--surface);color:var(--ink-muted)}.btn--danger{--btn-ring:var(--btn-sketch-ring);color:var(--logo-light);background:#a2202073}.btn--block{width:100%}.btn--tactic-next{--btn-ring:var(--btn-sketch-ring);color:var(--logo-light);background:#a2202047}.btn--tactic-lichess{--btn-ring:var(--btn-sketch-ring-blue);color:var(--logo-light);background:#2ea4ff1f}.link-button{color:var(--text-color-link);cursor:pointer;text-align:left;font:inherit;background:0 0;border:none;border-bottom:2px solid #a220208c;padding:0;text-decoration:none}.link-button:hover{border-bottom-color:var(--logo-red);color:var(--logo-light)}.section-title{text-align:center;margin:0 0 .75rem}.section-title--home{margin:0}.section-title__heading{font-size:2.4rem;font-family:var(--font-sketch);color:var(--ink);letter-spacing:.03em;margin:0;font-weight:700}.section-title__heading--clickable{cursor:pointer;-webkit-user-select:none;user-select:none}.section-title__heading--home{margin:2rem 0 1rem}.section-title__heading:after{content:"";background:var(--logo-blue);opacity:.85;border-radius:2px;width:72px;height:3px;margin:.4rem auto 0;display:block;transform:rotate(-.5deg)}.explanation{flex-shrink:0;display:inline-flex;position:relative}.explanation__trigger{cursor:help;font:inherit;background:0 0;border:none;justify-content:center;align-items:center;margin:0;padding:0;line-height:1;display:inline-flex}.explanation__i{border:2px solid var(--ink-muted);width:1.38rem;height:1.38rem;color:var(--ink-muted);box-shadow:var(--btn-sketch-ring);background:var(--surface);border-radius:50%;justify-content:center;align-items:center;font-family:Georgia,Times New Roman,serif;font-size:.82rem;font-style:italic;font-weight:800;transition:color .12s,border-color .12s,background .12s;display:flex}.explanation__trigger:hover .explanation__i,.explanation__trigger:focus-visible .explanation__i{color:var(--ink);border-color:var(--logo-blue);background:var(--bg-hover)}.explanation__trigger:focus-visible{outline:none}.explanation__trigger:focus-visible .explanation__i{box-shadow:var(--focus-ring),var(--btn-sketch-ring)}.explanation__tooltip{z-index:80;background:var(--explanation-tooltip-bg);border:var(--border-soft);border-radius:var(--sketch-radius);min-width:min(16rem,100vw - 2rem);max-width:min(22rem,100vw - 2rem);box-shadow:var(--box-shadow-heavy);color:var(--ink);text-align:left;font-size:.88rem;font-weight:500;line-height:1.5;font-family:var(--font-ui);opacity:0;visibility:hidden;pointer-events:none;padding:.75rem .95rem;font-style:normal;transition:opacity .14s,visibility .14s;position:absolute;bottom:calc(100% + 10px);left:50%;transform:translate(-50%)}.explanation:hover .explanation__tooltip,.explanation:focus-within .explanation__tooltip{opacity:1;visibility:visible;pointer-events:auto}.explanation__tooltip-inner p{margin:0 0 .5rem}.explanation__tooltip-inner p:last-child{margin-bottom:0}.auth-card{background:var(--surface);border:var(--border-soft);border-radius:var(--sketch-radius);box-shadow:var(--box-shadow-heavy);flex-direction:column;gap:.75rem;padding:1.15rem;display:flex}.auth-card--wide{max-width:460px;margin:0 auto}.auth-field{flex-direction:column;gap:.35rem;display:flex}.auth-field__label{color:var(--ink-muted);font-size:.82rem;font-weight:600}.auth-field__input{box-sizing:border-box;border-radius:var(--sketch-radius);border:var(--border-muted);background:var(--bg-deep);width:100%;color:var(--ink);font-size:.95rem;font-family:var(--font-ui);outline:none;padding:.55rem .65rem}.auth-field__input:focus{border-color:var(--line-strong);box-shadow:0 0 0 2px var(--accent-soft)}.alert{font-size:.82rem;font-weight:600}.alert--error,.alert--info{color:#f6f6f6eb}.alert--success{color:#86efac}.feedback-card{max-width:640px;margin:0 auto}.feedback-form__select{box-sizing:border-box;width:100%}.form-textarea{box-sizing:border-box;border-radius:var(--sketch-radius);border:var(--border-muted);background:var(--bg-deep);width:100%;min-height:8rem;color:var(--ink);font-size:.95rem;font-family:var(--font-ui);resize:vertical;outline:none;padding:.55rem .65rem;line-height:1.55}.form-textarea:focus{border-color:var(--line-strong);box-shadow:0 0 0 2px var(--accent-soft)}.field-hint{margin:-.15rem 0 0;font-size:.82rem}.friends-panel{background:var(--surface);border:var(--border-soft);border-radius:var(--sketch-radius);max-width:560px;box-shadow:var(--sketch-shadow);margin:0 auto;padding:.85rem .95rem}.friends-panel__title{color:var(--ink);font-weight:700;font-family:var(--font-sketch);margin-bottom:.5rem;font-size:1.35rem}.friends-panel__list{color:var(--ink-muted);margin:0;padding-left:1.1rem}.friends-panel__list li{margin-bottom:.35rem}.friends-panel__list a{color:var(--text-color-link);text-decoration:none}.friends-panel__list a:hover{text-decoration:underline}.friends-panel__empty{color:var(--ink-faint);font-size:.85rem}.profile-action-slot{justify-content:center;margin:6px 0 8px;display:flex}.friend-request-banner{border-radius:var(--sketch-radius);border:2px solid var(--line);max-width:560px;margin:.75rem auto 0;padding:.65rem .8rem;font-size:.82rem;font-weight:600}.friend-request-banner--success{border-color:var(--logo-red);color:var(--logo-light);background:#a2202047}.friend-request-banner--info{border-color:var(--line);color:var(--ink-muted);background:#ffffff0d}.friend-request-banner--error{border-color:var(--logo-red);color:#f6f6f6eb;background:#a2202047}.rating-display{border:var(--border-soft);border-radius:var(--sketch-radius);background:var(--surface);box-shadow:var(--sketch-shadow);box-sizing:border-box;flex-direction:row;justify-content:space-between;align-items:center;gap:.5rem;padding:.65rem .85rem;display:flex}.rating-display--panel{width:100%;max-width:var(--training-board-size)}.rating-display__label{color:var(--ink-muted);font-size:.88rem;font-weight:600}.rating-display__value{font-size:1.35rem;font-weight:800;font-family:var(--font-sketch);flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.5rem;display:inline-flex}.rating-display__value-inner{align-items:center;gap:.25rem;display:inline-flex}.rating-established-hint{width:1.2em;height:1.2em;font-size:.62em;font-weight:800;line-height:1;font-family:var(--font-ui);color:var(--ink-muted);border:1px solid var(--line);cursor:help;vertical-align:middle;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex;transform:translateY(-.05em)}.rating-display__delta{margin-left:.5rem;font-size:1rem;font-weight:700}.rating-display__delta--up{color:var(--eval-best)}.rating-display__delta--down{color:var(--eval-worst)}.panel-label{color:var(--ink-muted);font-size:.82rem;font-weight:600}.panel-label--spaced{margin-top:4px}.mode-block{flex-direction:column;gap:12px;display:flex}.mode-chip{border-radius:var(--btn-radius);border:2px solid var(--line);background:var(--bg-deep);color:var(--ink-muted);cursor:pointer;font-weight:700;font-family:var(--font-ui);padding:8px 14px;box-shadow:2px 2px #0000004d}.mode-chip--active{border-color:var(--gold);color:var(--gold);background:#c9a2271f}.mode-chip:disabled,.mode-chip--locked{opacity:.55;cursor:not-allowed;color:var(--ink-faint)}.chip-row{flex-wrap:wrap;gap:.5rem;display:flex}.chip-row--center{align-items:center}.stack{flex-direction:column;gap:.75rem;display:flex}.stack--gap-md{gap:.875rem}.hint{color:var(--ink-faint);font-size:.75rem}.position-display{flex-direction:column;gap:.35rem;display:flex}.position-display__label{color:var(--ink-muted);font-size:.82rem;font-weight:600}.position-display__value{color:var(--ink);font-size:1.15rem;font-weight:800;font-family:var(--font-sketch)}.position-display__input{border-radius:var(--sketch-radius);border:var(--border-muted);background:var(--bg-deep);max-width:8rem;color:var(--ink);padding:.45rem .55rem;font-weight:700}.position-display__wrap{background:var(--surface);border:var(--border-soft);border-radius:var(--sketch-radius);box-shadow:var(--sketch-shadow);align-items:center;gap:10px;padding:10px 12px;display:flex}.position-display__value-static{color:var(--ink);font-size:1.15rem;font-weight:800;font-family:var(--font-sketch)}.position-display__input-inline{border-radius:var(--sketch-radius);border:var(--border-muted);background:var(--bg-deep);width:56px;color:var(--ink);font-weight:800;font-family:var(--font-ui);padding:6px 8px}.position-selector{flex-direction:column;gap:14px;display:flex}.pos-mode-btn{border-radius:var(--btn-radius);border:var(--border-soft);background:var(--bg-deep);color:var(--ink-muted);cursor:pointer;font-weight:700;font-family:var(--font-ui);padding:8px 12px;box-shadow:2px 2px #00000059}.pos-mode-btn--active{border-color:var(--line-strong);color:var(--gold);background:#2ea4ff1f}.pos-mode-btn:disabled{opacity:.45;cursor:not-allowed}.file-select{border-radius:var(--sketch-radius);background:var(--bg-deep);color:var(--ink);border:var(--border-muted);font-family:var(--font-ui);padding:6px 10px}.file-letter-btn{border-radius:var(--btn-radius);border:var(--border-soft);background:var(--bg-deep);width:36px;height:36px;color:var(--ink-muted);cursor:pointer;font-weight:800;font-family:var(--font-ui);box-shadow:2px 2px #0000004d}.file-letter-btn--on{border-color:var(--gold);color:var(--gold);background:#ffe4c426}.file-letter-btn--blocked{opacity:.45;cursor:not-allowed}.file-chip{border:var(--border-muted);background:var(--surface);color:var(--ink);cursor:pointer;font-family:var(--font-ui);border-radius:4px;padding:.35rem 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22px}.start-btn:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-lg),var(--sketch-shadow)}.start-btn:disabled{background:var(--surface);color:var(--ink-faint);cursor:not-allowed;opacity:.7;box-shadow:var(--btn-sketch-ring-muted),var(--sketch-shadow)}.play-again-btn{border-radius:var(--btn-radius-lg);background:var(--bg-deep);color:var(--gold);cursor:pointer;font-weight:800;font-family:var(--font-ui);box-shadow:var(--btn-sketch-ring-lg),var(--sketch-shadow);border:none;padding:10px 18px}.play-again-btn:focus-visible{box-shadow:var(--focus-ring),var(--btn-sketch-ring-lg),var(--sketch-shadow)}.play-again-btn:disabled{opacity:.5;cursor:not-allowed}.difficulty-row{flex-wrap:wrap;gap:8px;display:flex}.diff-opt{text-transform:capitalize;border-radius:var(--btn-radius);background:var(--surface);color:var(--ink-muted);cursor:pointer;font-weight:700;font-family:var(--font-ui);box-shadow:var(--btn-sketch-ring),2px 2px 0 #00000059;border:none;padding:.5rem 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