.prep-countdown-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:1rem}.prep-countdown{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;margin-bottom:2.25rem}.prep-countdown-unit{border:1px solid var(--color-border);background:var(--color-bg-alt);border-radius:.75rem;padding:.85rem .25rem .7rem}.prep-countdown-value{display:block;font-family:var(--font-mono);font-size:clamp(1.75rem,8vw,2.5rem);font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--color-text);font-variant-numeric:tabular-nums}.prep-countdown-unit-label{display:block;margin-top:.5rem;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-muted)}.prep-prose{color:var(--color-text-secondary);font-size:15px;line-height:1.75;text-align:left}.prep-prose>*:first-child{margin-top:0}.prep-prose>.prep-md:first-child>*:first-child{margin-top:0}.prep-prose h1{font-family:var(--font-display);font-size:clamp(1.6rem,5vw,2.25rem);font-weight:700;line-height:1.15;color:var(--color-text);margin:2.5rem 0 1rem}.prep-prose h2{font-family:var(--font-display);font-size:clamp(1.2rem,3.5vw,1.5rem);font-weight:600;line-height:1.25;color:var(--color-text);margin:2.5rem 0 .75rem;padding-top:1.25rem;border-top:1px solid var(--color-border)}.prep-prose h3{font-family:var(--font-display);font-size:1.05rem;font-weight:600;color:var(--color-text);margin:1.75rem 0 .5rem}.prep-prose h4{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-muted);margin:1.5rem 0 .5rem}.prep-prose p{margin:0 0 1.1rem}.prep-prose strong{color:var(--color-text);font-weight:650}.prep-prose em{font-style:italic}.prep-prose a{color:var(--color-accent);text-decoration:underline;text-underline-offset:2px}.prep-prose ul,.prep-prose ol{margin:0 0 1.1rem;padding-left:1.35rem}.prep-prose ul{list-style:disc}.prep-prose ol{list-style:decimal}.prep-prose li{margin-bottom:.4rem}.prep-prose li::marker{color:var(--color-text-muted)}.prep-prose blockquote{margin:0 0 1.1rem;padding:.35rem 0 .35rem 1rem;border-left:2px solid var(--color-accent);color:var(--color-text)}.prep-prose code{font-family:var(--font-mono);font-size:.85em;background:var(--color-surface-hover);border-radius:.25rem;padding:.1rem .35rem;color:var(--color-text)}.prep-prose pre{background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:.75rem;padding:.9rem 1rem;overflow-x:auto;margin:0 0 1.1rem}.prep-prose pre code{background:none;padding:0;font-size:12.5px;line-height:1.6}.prep-prose hr{border:none;border-top:1px solid var(--color-border);margin:2rem 0}.prep-prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:0 0 1.25rem;font-size:13px}.prep-prose th,.prep-prose td{border-bottom:1px solid var(--color-border);padding:.5rem .75rem;text-align:left;white-space:nowrap}@media(max-width:640px){.prep-prose td{white-space:normal}}.prep-prose th{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-text-muted);font-weight:500}.prep-prose td{color:var(--color-text-secondary)}.prep-prose tr:last-child td{border-bottom:none}.prep-block{margin:2rem 0;padding:.85rem 1rem 1.05rem;border:1px solid var(--color-border);border-radius:1rem;background:var(--color-bg-alt)}.prep-block-head{display:flex;align-items:baseline;flex-wrap:wrap;gap:.5rem .7rem;margin-bottom:.85rem}.prep-block-kind{flex:none;padding:.18rem .5rem;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);font-family:var(--font-mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-muted)}.prep-block-title{font-family:var(--font-display);font-size:.95rem;font-weight:600;line-height:1.35;color:var(--color-text)}.prep-diagram{display:grid;gap:.9rem}.prep-diagram-side{display:flex;flex-direction:column;gap:.85rem}@media(min-width:620px){.prep-diagram{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:1.25rem;align-items:start}}.prep-board-caption{margin:0;font-size:13.5px;line-height:1.6;color:var(--color-text-secondary);text-align:left}.prep-board-caption strong{color:var(--color-text);font-weight:650}.prep-diagram-try{display:inline-flex;align-self:start;align-items:center;gap:.3rem;padding:.1rem 0;border:0;background:none;font-family:var(--font-display);font-size:11.5px;font-weight:500;color:var(--color-text-muted);cursor:pointer;transition:color .16s ease}.prep-diagram-try:hover{color:var(--color-accent)}.prep-diagram-try:focus-visible{outline:2px solid var(--color-accent);outline-offset:3px;border-radius:.3rem}.prep-diagram-try[aria-expanded=true]{color:var(--color-accent)}.prep-diagram-sandbox{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--color-border)}.prep-solution{margin:0}.prep-solution-toggle{display:inline-flex;align-items:center;gap:.45rem;min-height:38px;padding:.4rem .9rem;border:1px solid color-mix(in srgb,var(--color-accent) 38%,transparent);border-radius:.7rem;background:var(--color-accent-subtle);font-family:var(--font-display);font-size:12.5px;font-weight:600;color:var(--color-accent);cursor:pointer;transition:color .16s ease,border-color .16s ease,background .16s ease}.prep-solution-toggle:hover{border-color:var(--color-accent);background:var(--color-accent-medium)}.prep-solution-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-solution-body{display:block;margin-top:.6rem;padding:.7rem .9rem;border:1px solid var(--color-border);border-left:2px solid var(--color-accent);border-radius:.6rem;background:var(--color-surface);font-size:14px;line-height:1.65;color:var(--color-text)}.prep-solution-label{display:block;margin-bottom:.2rem;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-muted)}.prep-line{margin:0}.prep-line-placeholder{display:flex;align-items:center;justify-content:center;min-height:400px;border:1px solid var(--color-border);border-radius:.85rem;background:var(--color-surface);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-muted)}@media(min-width:768px){.prep-line-placeholder{min-height:340px}}.prep-board-placeholder{display:flex;align-items:center;justify-content:center;width:100%;aspect-ratio:1 / 1;border:1px solid var(--color-border);border-radius:.75rem;background:var(--color-surface);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-muted)}.prep-study{display:grid;gap:1rem;border-radius:.85rem;outline:none}.prep-study:focus-visible{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-accent) 45%,transparent)}@media(min-width:620px){.prep-study{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:1.25rem;align-items:start}}.prep-study-board{display:flex;flex-direction:column;gap:.6rem;min-width:0}.prep-study-now{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem .5rem;margin:.15rem 0 0;min-height:20px}.prep-study-move{font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--color-text)}.prep-study-in{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent)}.prep-study-note{margin:0;font-size:12.5px;font-style:italic;line-height:1.55;color:var(--color-text-secondary)}.prep-study-controls{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}.prep-study-try{display:inline-flex;align-items:center;gap:.35rem;min-height:34px;padding:0 .6rem;border:1px solid var(--color-border);border-radius:.7rem;background:var(--color-surface);font-family:var(--font-display);font-size:11.5px;font-weight:500;color:var(--color-text-secondary);cursor:pointer;transition:color .16s ease,border-color .16s ease,background .16s ease}.prep-study-try:hover{border-color:var(--color-border-hover);background:var(--color-surface-hover);color:var(--color-text)}.prep-study-try:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-study-try[data-active]{border-color:color-mix(in srgb,var(--color-accent) 45%,transparent);background:var(--color-accent-subtle);color:var(--color-accent)}.prep-study-sandbox{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--color-border)}.prep-study-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:34px;border:1px solid var(--color-border);border-radius:.7rem;background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;transition:color .16s ease,border-color .16s ease,background .16s ease}.prep-study-btn:hover:not(:disabled){border-color:var(--color-border-hover);background:var(--color-surface-hover);color:var(--color-text)}.prep-study-btn:disabled{opacity:.35;cursor:default}.prep-study-back{display:inline-flex;align-items:center;gap:.35rem;margin-left:auto;min-height:34px;padding:0 .6rem;border:1px solid color-mix(in srgb,var(--color-accent) 30%,transparent);border-radius:.7rem;background:var(--color-accent-subtle);font-family:var(--font-display);font-size:11.5px;font-weight:500;color:var(--color-accent);cursor:pointer;transition:background .16s ease,border-color .16s ease}.prep-study-back:hover{border-color:var(--color-accent);background:var(--color-accent-medium)}.prep-study-hint{margin:0;font-size:11px;line-height:1.45;color:var(--color-text-muted)}.prep-study-panel{min-width:0;max-height:340px;padding:.7rem .75rem .8rem;border:1px solid var(--color-border);border-radius:.85rem;background:var(--color-surface);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--color-border-hover) transparent}@media(min-width:620px){.prep-study-panel{max-height:420px}}.study-line{display:block;line-height:1.25}.study-move-wrap{display:inline-flex;align-items:center;vertical-align:middle;gap:2px;margin-right:.28rem;white-space:nowrap}.study-num{font-family:var(--font-mono);font-size:11px;font-variant-numeric:tabular-nums;color:var(--color-text-muted)}.study-move{display:inline-flex;align-items:center;min-height:30px;padding:.1rem .3rem;border-radius:.35rem;background:none;font-family:var(--font-mono);font-size:12.5px;line-height:1.3;color:var(--color-text-muted);cursor:pointer;transition:color .12s ease,background .12s ease}@media(min-width:620px){.study-move{min-height:24px}}.study-move:hover{background:var(--color-surface-hover);color:var(--color-text)}.study-move[data-path]{color:var(--color-text)}.study-move[data-active]{background:var(--color-accent-medium);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--color-accent) 40%,transparent);color:var(--color-accent);font-weight:600}.study-move:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}.study-eval{padding:.05rem .28rem;border-radius:.3rem;background:var(--color-surface-hover);font-family:var(--font-mono);font-size:10.5px;font-variant-numeric:tabular-nums;color:var(--color-text-muted)}.study-branches{display:block;margin:.3rem 0 .4rem}.study-branch{margin:.3rem 0;padding-left:.6rem;border-left:2px solid var(--color-border)}.study-branch[data-emphasis]{border-left-color:color-mix(in srgb,var(--color-accent) 55%,transparent)}.study-branch-head{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem;margin:0 0 .1rem}.study-branch-label{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-text-muted)}.study-src-chip{max-width:100%;padding:.05rem .3rem;border:1px solid var(--color-border);border-radius:.3rem;background:var(--color-surface);font-family:var(--font-mono);font-size:9.5px;letter-spacing:.04em;line-height:1.5;color:var(--color-text-muted);overflow-wrap:anywhere}.study-branch[data-emphasis]>.study-branch-head .study-branch-label{color:var(--color-accent)}.study-main-head{margin-bottom:.25rem}.study-main-head .study-branch-label{color:var(--color-text-secondary)}.study-branch-note{margin:.15rem 0 0;font-size:12px;font-style:italic;line-height:1.5;color:var(--color-text-muted)}.prep-study-warning{grid-column:1 / -1;display:flex;align-items:flex-start;gap:.4rem;margin:0;padding-top:.1rem;font-size:11.5px;line-height:1.45;color:var(--color-text-muted)}.prep-study-warning svg{flex:none;margin-top:2px;color:var(--color-error)}.prep-drill{display:grid;gap:.9rem}@media(min-width:620px){.prep-drill{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:1.25rem;align-items:start}}.prep-drill-board{min-width:0}.prep-drill-side{display:flex;flex-direction:column;gap:.7rem;min-width:0}.prep-drill-status{display:flex;flex-direction:column;gap:.35rem;min-height:52px}.prep-drill-ask,.prep-drill-solved,.prep-drill-revealed{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem .6rem;margin:0}.prep-drill-turn{font-family:var(--font-display);font-size:13.5px;font-weight:600;color:var(--color-text)}.prep-drill-progress{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;font-variant-numeric:tabular-nums;color:var(--color-text-muted)}.prep-drill-check{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:999px;background:color-mix(in srgb,var(--color-success, #16a34a) 18%,transparent);color:var(--color-success, #16a34a)}.prep-drill-solved-label{font-family:var(--font-display);font-size:13.5px;font-weight:600;color:var(--color-text)}.prep-drill-firsttry{padding:.05rem .35rem;border-radius:.3rem;background:var(--color-accent-subtle);font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent)}.prep-drill-line{display:flex;flex-wrap:wrap;align-items:baseline;gap:.35rem;margin:0;font-size:12.5px;line-height:1.55;color:var(--color-text-secondary)}.prep-drill-line--muted{align-items:center;color:var(--color-text-muted)}.prep-drill-line--wrong{color:var(--color-error)}.prep-drill-line--good{color:var(--color-text)}.prep-drill-accepted{display:flex;flex-direction:column;gap:.15rem;margin:0;padding:.3rem 0 .3rem .55rem;border-left:2px solid var(--color-accent);font-size:12.5px;line-height:1.55}.prep-drill-accepted-verdict{font-family:var(--font-display);font-weight:600;color:var(--color-text);font-variant-numeric:tabular-nums}.prep-drill-accepted-lesson{color:var(--color-text-muted)}.prep-drill-dots{flex:none;width:7px;height:7px;border-radius:999px;background:currentColor;animation:prep-drill-pulse 1s ease-in-out infinite}@keyframes prep-drill-pulse{0%,to{opacity:.25}50%{opacity:1}}.prep-drill-hint-btn,.prep-drill-retry{display:inline-flex;align-self:flex-start;align-items:center;gap:.45rem;min-height:36px;padding:.35rem .85rem;border:1px solid color-mix(in srgb,var(--color-accent) 38%,transparent);border-radius:.7rem;background:var(--color-accent-subtle);font-family:var(--font-display);font-size:12.5px;font-weight:600;color:var(--color-accent);cursor:pointer;transition:border-color .16s ease,background .16s ease}.prep-drill-hint-btn:hover,.prep-drill-retry:hover{border-color:var(--color-accent);background:var(--color-accent-medium)}.prep-drill-hint-btn:focus-visible,.prep-drill-retry:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-drill-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem .9rem}.prep-drill-reveal-btn{display:inline-flex;align-items:center;gap:.4rem;min-height:36px;padding:.35rem .15rem;border:0;border-radius:.4rem;background:none;font-family:var(--font-display);font-size:12px;font-weight:500;color:var(--color-text-muted);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--color-text-muted) 45%,transparent);text-underline-offset:3px;cursor:pointer;transition:color .16s ease}.prep-drill-reveal-btn:hover{color:var(--color-text)}.prep-drill-reveal-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-drill-solution{display:flex;flex-direction:column;gap:.3rem;margin:.1rem 0 0;padding:0;list-style:none;counter-reset:prep-drill-move}.prep-drill-solution li{display:flex;flex-wrap:wrap;align-items:baseline;gap:.35rem;font-size:12.5px;line-height:1.55;color:var(--color-text-secondary)}.prep-drill-solution li:before{counter-increment:prep-drill-move;content:counter(prep-drill-move) ".";flex:none;min-width:1.05em;font-family:var(--font-mono);font-size:10px;color:var(--color-text-muted)}.prep-drill-solution-san{font-family:var(--font-mono);font-size:12px;font-weight:600;color:var(--color-text)}.prep-drill-hint{padding:.6rem .8rem;border:1px solid var(--color-border);border-left:2px solid var(--color-accent);border-radius:.6rem;background:var(--color-surface);font-size:13px;line-height:1.6;color:var(--color-text)}.prep-drill-board[data-shake=true]{animation:prep-drill-shake .42s cubic-bezier(.36,.07,.19,.97)}@keyframes prep-drill-shake{10%,90%{transform:translate(-2px)}20%,80%{transform:translate(4px)}30%,50%,70%{transform:translate(-6px)}40%,60%{transform:translate(6px)}}@media(prefers-reduced-motion:reduce){.prep-drill-board[data-shake=true]{animation:none}.prep-drill-dots{animation:none;opacity:.6}}.prep-gauntlet-launch{display:flex;flex-direction:column;align-items:flex-start;gap:.6rem}.prep-gauntlet-launch-blurb{margin:0;font-size:13.5px;line-height:1.6;color:var(--color-text-secondary)}.prep-gauntlet-launch-best{margin:0;font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;font-variant-numeric:tabular-nums;color:var(--color-text-muted)}.prep-gauntlet-scrim{position:fixed;inset:0;z-index:70;display:flex;align-items:center;justify-content:center;padding:max(.75rem,env(safe-area-inset-top)) .75rem max(.75rem,env(safe-area-inset-bottom));background:#020617c7;backdrop-filter:blur(6px)}[data-theme=light] .prep-gauntlet-scrim{background:#0f172a8c}.prep-gauntlet{display:flex;flex-direction:column;gap:.75rem;width:100%;max-width:28rem;max-height:100%;overflow-y:auto;padding:.85rem .9rem 1rem;border:1px solid var(--color-border);border-radius:1rem;background:var(--color-bg-alt);box-shadow:0 30px 70px -30px #000000b3}.prep-gauntlet:focus{outline:none}.prep-gauntlet-head{display:flex;align-items:center;gap:.6rem}.prep-gauntlet-step{flex:none;padding:.18rem .5rem;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);font-family:var(--font-mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-muted)}.prep-gauntlet-clock{flex:1;font-family:var(--font-mono);font-size:13px;font-variant-numeric:tabular-nums;letter-spacing:.06em;color:var(--color-text-secondary)}.prep-gauntlet-close{display:inline-flex;flex:none;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--color-border);border-radius:.6rem;background:var(--color-surface);color:var(--color-text-muted);cursor:pointer;transition:color .16s ease,border-color .16s ease}.prep-gauntlet-close:hover{color:var(--color-text);border-color:var(--color-text-muted)}.prep-gauntlet-close:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-gauntlet-body{display:flex;flex-direction:column;gap:.7rem;min-width:0}.prep-gauntlet-board{position:relative;min-width:0}.prep-gauntlet-board[data-shake=true]{animation:prep-drill-shake .42s cubic-bezier(.36,.07,.19,.97)}.prep-gauntlet-flash{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;border-radius:.75rem;background:color-mix(in srgb,var(--color-success, #16a34a) 26%,rgba(2,6,23,.45));animation:prep-gauntlet-flash-in .18s ease-out}.prep-gauntlet-flash-check{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:999px;background:#fff;color:var(--color-success, #16a34a)}.prep-gauntlet-flash-tag{padding:.1rem .45rem;border-radius:.35rem;background:#ffffffeb;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:#0f172a}@keyframes prep-gauntlet-flash-in{0%{opacity:0}to{opacity:1}}.prep-gauntlet-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}.prep-gauntlet-primary{display:inline-flex;align-items:center;gap:.45rem;min-height:40px;padding:.4rem 1rem;border:1px solid color-mix(in srgb,var(--color-accent) 38%,transparent);border-radius:.7rem;background:var(--color-accent-subtle);font-family:var(--font-display);font-size:13px;font-weight:600;color:var(--color-accent);cursor:pointer;transition:border-color .16s ease,background .16s ease}.prep-gauntlet-primary:hover{border-color:var(--color-accent);background:var(--color-accent-medium)}.prep-gauntlet-skip,.prep-gauntlet-ghost{display:inline-flex;align-items:center;gap:.4rem;min-height:36px;margin-left:auto;padding:.35rem .8rem;border:1px solid var(--color-border);border-radius:.7rem;background:var(--color-surface);font-family:var(--font-display);font-size:12.5px;font-weight:500;color:var(--color-text-muted);cursor:pointer;transition:color .16s ease,border-color .16s ease}.prep-gauntlet-skip:hover,.prep-gauntlet-ghost:hover{color:var(--color-text);border-color:var(--color-text-muted)}.prep-gauntlet-primary:focus-visible,.prep-gauntlet-skip:focus-visible,.prep-gauntlet-ghost:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.prep-gauntlet-end{display:flex;flex-direction:column;align-items:flex-start;gap:.5rem;padding:.5rem 0 .25rem}.prep-gauntlet-score{margin:0;font-family:var(--font-display);font-size:1.35rem;font-weight:650;font-variant-numeric:tabular-nums;line-height:1.25;color:var(--color-text)}.prep-gauntlet-newbest{margin:0;padding:.1rem .45rem;border-radius:.35rem;background:var(--color-accent-subtle);font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent)}.prep-gauntlet-sub{margin:0;font-size:12.5px;line-height:1.55;font-variant-numeric:tabular-nums;color:var(--color-text-muted)}.prep-gauntlet-end .prep-gauntlet-actions{width:100%;margin-top:.35rem}@media(prefers-reduced-motion:reduce){.prep-gauntlet-board[data-shake=true],.prep-gauntlet-flash{animation:none}}.prep-block-error{margin:1.75rem 0;padding:.85rem 1rem;border:1px solid var(--color-border);border-left:2px solid var(--color-error);border-radius:.75rem;background:var(--color-bg-alt)}.prep-block-error-title{display:flex;align-items:center;gap:.4rem;margin:0;font-family:var(--font-display);font-size:13px;font-weight:600;color:var(--color-text)}.prep-block-error-reason{margin:.25rem 0 0;font-size:12.5px;line-height:1.55;color:var(--color-text-muted)}.prep-block-error pre{margin:.6rem 0 0;padding:.6rem .75rem;border:1px solid var(--color-border);border-radius:.5rem;background:var(--color-surface);overflow-x:auto;white-space:pre-wrap;word-break:break-word;font-family:var(--font-mono);font-size:11.5px;line-height:1.6;color:var(--color-text-secondary)}.prep-lang-note{display:flex;align-items:center;gap:.45rem;margin:0 0 1.5rem;padding:.55rem .75rem;border:1px solid var(--color-border);border-radius:.5rem;background:var(--color-surface);font-size:12.5px;line-height:1.55;color:var(--color-text-muted)}.prep-lang-note svg{flex-shrink:0;color:var(--color-accent)}