.sidebar-chess{width:100%;background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md, 10px);padding:12px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-card);transition:border-color .2s ease,box-shadow .2s ease;-webkit-user-select:none;user-select:none}.sidebar-chess:hover{border-color:var(--border-strong)}.sidebar-chess__header{display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-chess__title-group{display:flex;align-items:center;gap:6px;min-width:0}.sidebar-chess__icon{font-size:1rem;line-height:1}.sidebar-chess__title{font-family:var(--font-pixel, var(--font-mono));font-size:.8rem;color:var(--text);letter-spacing:.04em;white-space:nowrap}.sidebar-chess__status-row{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:2px 0 4px}.sidebar-chess__badge{font-family:var(--font-mono);font-size:.62rem;padding:3px 8px;border-radius:4px;background:var(--surface);border:1px solid var(--border);color:var(--text-muted);white-space:nowrap}.sidebar-chess__badge--white{color:var(--text);background:var(--surface);border-color:var(--accent)}.sidebar-chess__badge--black{color:#f59e0b;border-color:#f59e0b66}.sidebar-chess__header-actions{display:flex;align-items:center;gap:5px;flex-shrink:0}.sidebar-chess__body{display:flex;flex-direction:column;gap:8px;overflow:hidden}.sidebar-chess__controls{display:flex;align-items:center;justify-content:space-between;gap:6px;flex-wrap:wrap;padding:4px 0 6px;border-bottom:1px solid var(--border-soft, var(--border))}.sidebar-chess__mode-toggle{display:flex;background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:2px;gap:2px}.sidebar-chess__mode-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;font-family:var(--font-mono);font-size:.64rem;border-radius:3px;border:none;background:transparent;color:var(--text-muted);cursor:pointer;transition:all .15s ease}.sidebar-chess__mode-btn:hover{color:var(--text)}.sidebar-chess__mode-btn.is-active{background:var(--text);color:var(--bg);font-weight:600;box-shadow:0 1px 3px #00000026}.sidebar-chess__difficulty{font-family:var(--font-mono);font-size:.64rem;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:3px 6px;outline:none;cursor:pointer}.sidebar-chess__action-btns{display:flex;align-items:center;gap:4px}.sidebar-chess__btn{display:inline-flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--border);color:var(--text-muted);border-radius:4px;cursor:pointer;transition:all .15s ease;font-family:var(--font-mono)}.sidebar-chess__btn:hover{background:var(--surface-raised);color:var(--text);border-color:var(--border-strong)}.sidebar-chess__btn--icon{width:26px;height:26px;font-size:.78rem;padding:0}.sidebar-chess__btn--new{font-size:.65rem;padding:3px 8px;font-weight:600;color:var(--text);background:var(--surface);border-color:var(--border)}.sidebar-chess__btn--new:hover{background:var(--text);color:var(--bg);border-color:var(--text)}.sidebar-chess__tray{display:flex;flex-wrap:wrap;align-items:center;gap:2px;min-height:16px;padding:2px 4px;font-size:.82rem;color:var(--text-faint);line-height:1}.sidebar-chess__captured-piece{display:inline-block;opacity:.85}.sidebar-chess__board-wrap{width:100%;aspect-ratio:1 / 1;position:relative;background:#0f172a;border:1px solid var(--border-strong);border-radius:6px;padding:4px;box-shadow:inset 0 2px 8px #00000059}.sidebar-chess__board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);width:100%;height:100%;border-radius:4px;overflow:hidden}.sidebar-chess__square{position:relative;width:100%;height:100%;padding:0;border:none;background:transparent;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color .12s ease}.sidebar-chess__square.is-light{background:#ffffff1a}.sidebar-chess__square.is-dark{background:#00000061}.sidebar-chess__square:hover{filter:brightness(1.18)}.sidebar-chess__square.is-selected{background:#00ffcc4d!important;box-shadow:inset 0 0 0 2px var(--accent)}.sidebar-chess__square.is-last-move{background:#f59e0b40}.sidebar-chess__square.is-check{background:#ef444473!important;box-shadow:inset 0 0 8px #ef4444;animation:chess-check-pulse 1.2s infinite ease-in-out}@keyframes chess-check-pulse{0%,to{opacity:1}50%{opacity:.65}}.sidebar-chess__piece{font-size:clamp(1.15rem,3.2vw,1.55rem);line-height:1;pointer-events:none;transition:transform .15s ease;-webkit-user-select:none;user-select:none;display:inline-block}.sidebar-chess__piece--w{color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.9),0 0 6px rgba(255,255,255,.3);filter:drop-shadow(0 2px 2px rgba(0,0,0,.6))}.sidebar-chess__piece--b{color:#111827;text-shadow:0 0 2px rgba(255,255,255,.9);-webkit-text-stroke:.8px rgba(255,255,255,.85);filter:drop-shadow(0 2px 3px rgba(0,0,0,.7))}[data-theme=light] .sidebar-chess__board-wrap{background:#64748b;border-color:#94a3b8}[data-theme=light] .sidebar-chess__square.is-light{background:#fff}[data-theme=light] .sidebar-chess__square.is-dark{background:#cbd5e1}[data-theme=light] .sidebar-chess__piece--w{color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.4);-webkit-text-stroke:1.2px #1e293b;filter:drop-shadow(0 2px 3px rgba(0,0,0,.35))}[data-theme=light] .sidebar-chess__piece--b{color:#0f172a;text-shadow:none;-webkit-text-stroke:.6px #0f172a;filter:drop-shadow(0 1px 2px rgba(0,0,0,.25))}[data-theme=light] .sidebar-chess__square.is-selected{background:#0ea5e947!important;box-shadow:inset 0 0 0 2px #0284c7}[data-theme=light] .sidebar-chess__square.is-last-move{background:#f59e0b52}.sidebar-chess__legal-dot{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--accent, #00ffcc);box-shadow:0 0 6px var(--accent, #00ffcc);pointer-events:none;opacity:.9}[data-theme=light] .sidebar-chess__legal-dot{background:#0284c7;box-shadow:0 0 5px #0284c799}.sidebar-chess__capture-ring{position:absolute;top:2px;right:2px;bottom:2px;left:2px;border:2px solid #ef4444;border-radius:4px;box-shadow:0 0 6px #ef444499;pointer-events:none;animation:capture-pulse 1.2s infinite ease-in-out}@keyframes capture-pulse{0%,to{transform:scale(1)}50%{transform:scale(.92)}}.sidebar-chess__coord{position:absolute;font-family:var(--font-mono);font-size:.52rem;line-height:1;color:var(--text-faint);opacity:.55;pointer-events:none}.sidebar-chess__coord--rank{top:2px;left:2px}.sidebar-chess__coord--file{bottom:2px;right:2px}.sidebar-chess--modal{background:transparent;border:none;box-shadow:none;padding:0;max-width:480px;margin:0 auto}.sidebar-chess--modal .sidebar-chess__board-wrap{max-width:440px;margin:0 auto}.sidebar-chess--modal .sidebar-chess__piece{font-size:2.3rem}.sidebar-chess--modal .sidebar-chess__legal-dot{width:14px;height:14px}.bounce-cards{position:relative;touch-action:pan-y;-webkit-tap-highlight-color:transparent}.bounce-cards__card{position:absolute;top:50%;left:50%;width:var(--bounce-cards-size);aspect-ratio:1;overflow:hidden;border:var(--bounce-cards-border) solid var(--bounce-cards-border-color);border-radius:var(--bounce-cards-radius);background:var(--bounce-cards-border-color);box-shadow:var(--bounce-cards-shadow);transform:translate(-50%,-50%) scale(0);transition:box-shadow .3s ease;will-change:transform}.bounce-cards__card[data-active]{box-shadow:var(--bounce-cards-shadow-active)}.bounce-cards__card--clickable{cursor:pointer}.bounce-cards__card--clickable:focus-visible{outline:2px solid var(--bounce-cards-border-color);outline-offset:3px}.bounce-cards__card img{display:block;width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-select:none;user-select:none}.stack{position:relative;width:100%;height:100%;outline:none}.stack:focus-visible .stack-card[data-top] .stack-card-face{outline:2px solid currentColor;outline-offset:4px}.stack-card{position:absolute;top:0;right:0;bottom:0;left:0;will-change:transform;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}.stack-card-face{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;will-change:transform}.stack-card-content{position:relative;width:100%;height:100%;overflow:hidden}.stack-card-content img{display:block;width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none}.stack-card-shade{position:absolute;top:0;right:0;bottom:0;left:0;background:#000;pointer-events:none}.star-border{position:relative;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;margin:0;padding:.875rem 1.5rem;border:0;border-radius:var(--star-border-radius);background:transparent;color:var(--star-border-text);font:inherit;font-weight:500;line-height:1.25;text-decoration:none;-webkit-tap-highlight-color:transparent}.star-border:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:-2;border-radius:inherit;background:var(--star-border-surface);box-shadow:inset 0 0 0 var(--star-border-thickness) var(--star-border-track);pointer-events:none}.star-border__light{position:absolute;top:-48px;left:-48px;z-index:-1;width:calc(100% + 96px);height:calc(100% + 96px);pointer-events:none}button.star-border,a.star-border{cursor:pointer}.star-border:focus-visible{outline:2px solid var(--star-border-track);outline-offset:3px}.star-border:disabled{cursor:not-allowed;opacity:.5}.folder-root{--folder-ground: rgba(247, 239, 239, .42);--folder-ground-soft: rgba(248, 248, 251, .26);--folder-focus: #f9f9fe;position:relative;display:inline-block;width:var(--folder-w);height:calc(var(--folder-tab-h) + var(--folder-h));vertical-align:middle;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;font-family:var(--font-sans, system-ui, -apple-system, sans-serif)}.folder-root[data-theme=light]{--folder-ground: rgb(254, 254, 255);--folder-ground-soft: rgb(248, 248, 251);--folder-focus: #f9f9fe}.folder-stage{position:absolute;top:0;right:0;bottom:0;left:0;perspective:var(--folder-depth);perspective-origin:calc(var(--folder-w) / 2) calc(var(--folder-tab-h) + var(--folder-h) / 2);cursor:pointer;outline:none;isolation:isolate}.folder-layer{position:absolute;top:0;left:0;transform-origin:0 0;will-change:transform}.folder-ground{z-index:1;width:var(--folder-w);pointer-events:none}.folder-root[data-mode=book] .folder-ground,.folder-cast{height:var(--folder-h);border-radius:var(--folder-front-radius);box-shadow:0 calc(1px * var(--folder-scale)) calc(2px * var(--folder-scale)) var(--folder-ground),0 calc(10px * var(--folder-scale)) calc(28px * var(--folder-scale)) var(--folder-ground-soft)}.folder-cast{z-index:1;width:var(--folder-w);height:calc(var(--folder-h) - var(--folder-front-y) + var(--folder-tab-h));pointer-events:none}.folder-root[data-mode=flap] .folder-ground{height:calc(var(--folder-h) * .14);margin-top:calc(var(--folder-h) * -.07);border-radius:50%;background:var(--folder-ground);filter:blur(calc(var(--folder-h) * .05))}.folder-back{z-index:4;width:var(--folder-w);height:calc(var(--folder-tab-h) + var(--folder-h))}.folder-back-fill{position:absolute;top:0;right:0;bottom:0;left:0}.folder-gutter{position:absolute;top:var(--folder-tab-h);bottom:0;left:0;width:calc(12px * var(--folder-scale));background:linear-gradient(90deg,#fbfafa,#0000);opacity:var(--folder-gutter, 0)}.folder-back-rim{position:absolute;top:0;right:0;bottom:0;left:0;overflow:visible;pointer-events:none}.folder-focus{fill:none;stroke:none}.folder-root[data-variant=solid] .folder-focus{stroke:#dfcccc;stroke-width:1}.folder-stage:focus-visible .folder-focus{stroke:var(--folder-focus)!important;stroke-width:2!important}.folder-tab-text{position:absolute;top:0;display:flex;height:var(--folder-tab-h);box-sizing:border-box;align-items:center;justify-content:center;padding-top:calc(1px * var(--folder-scale));overflow:hidden;color:var(--folder-tab-ink);opacity:var(--folder-label, 1);font-family:var(--font-sans, system-ui, -apple-system, sans-serif);font-size:calc(11px * var(--folder-scale));font-weight:600;letter-spacing:.01em;line-height:1;text-overflow:ellipsis;white-space:nowrap}.folder-measure{left:0;width:auto;padding:0;visibility:hidden;pointer-events:none}.folder-item{z-index:10;width:var(--folder-doc-w);height:var(--folder-doc-h);overflow:hidden;border-radius:calc(7px * var(--folder-scale));background:var(--folder-paper);box-shadow:0 0 0 .5px #fffefe,0 calc(1px * var(--folder-scale)) calc(2px * var(--folder-scale)) #0000001f,0 calc((2px + var(--folder-lift, 0) * 16px) * var(--folder-scale)) calc((5px + var(--folder-lift, 0) * 26px) * var(--folder-scale)) rgba(0,0,0,calc(.1 + var(--folder-lift, 0) * .14));outline:none}.folder-root[data-open] .folder-item{cursor:pointer}.folder-root[data-draggable] .folder-item{cursor:grab;touch-action:none}.folder-root[data-dragging],.folder-root[data-dragging] *{cursor:grabbing!important}.folder-item:focus-visible{outline:2px solid var(--folder-focus);outline-offset:3px}.folder-shade{z-index:39;width:var(--folder-w);height:var(--folder-front-h);border-radius:var(--folder-front-radius);background:linear-gradient(90deg,#00000057,#00000029);filter:blur(calc(6px * var(--folder-scale)));opacity:0;pointer-events:none}.folder-front{z-index:40;width:var(--folder-w);height:var(--folder-front-h)}.folder-face{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;border-radius:var(--folder-front-radius)}.folder-face:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;background:linear-gradient(rgba(255,255,255,var(--folder-glint, 0)),rgba(255,255,255,var(--folder-glint, 0))),rgba(0,0,0,var(--folder-dim, 0));pointer-events:none}.folder-face-inner,.folder-front[data-face=inner] .folder-face-outer{visibility:hidden}.folder-face-inner{left:-1px}.folder-front[data-face=inner] .folder-face-inner{visibility:visible}.folder-inner-gutter{position:absolute;top:0;bottom:0;left:0;width:calc(12px * var(--folder-scale));background:linear-gradient(90deg,#0000001f,#0000)}.folder-root[data-variant=solid] .folder-back-fill,.folder-root[data-variant=solid] .folder-face-inner{background:linear-gradient(180deg,var(--folder-inside-top),var(--folder-inside-bottom))}.folder-root[data-variant=solid] .folder-face-outer{background:linear-gradient(160deg,var(--folder-front-top) 0%,var(--folder-base) 48%,var(--folder-front-bottom) 100%);box-shadow:inset 0 1px #ffffff47,inset 0 0 0 1px #ffffff1f}.folder-root[data-variant=glass] .folder-back-fill{background:linear-gradient(180deg,var(--folder-inside-top),var(--folder-inside-bottom))}.folder-root[data-variant=glass] .folder-face-outer,.folder-root[data-variant=glass] .folder-face-inner{background:linear-gradient(160deg,#ffffff57,#ffffff14 46%,#ffffff29),rgba(var(--folder-rgb),.24);box-shadow:inset 0 0 0 1px #ffffff57,inset 0 1px #fff9;-webkit-backdrop-filter:blur(var(--folder-frost)) saturate(1.8);backdrop-filter:blur(var(--folder-frost)) saturate(1.8)}.folder-root[data-gl] .folder-face{visibility:hidden}.folder-glass{position:absolute;z-index:40;pointer-events:none}.folder-root[data-variant=matte] .folder-back-fill,.folder-root[data-variant=matte] .folder-face-inner{background:var(--folder-inside-bottom)}.folder-root[data-variant=matte] .folder-face-outer{background:var(--folder-base)}.folder-doc{display:flex;height:100%;box-sizing:border-box;flex-direction:column;gap:calc(5px * var(--folder-scale));padding:calc(14px * var(--folder-scale)) calc(13px * var(--folder-scale));font-family:var(--font-sans, system-ui, -apple-system, sans-serif)}.folder-doc-title{display:block;overflow:hidden;margin-bottom:calc(4px * var(--folder-scale));color:#18181b;font-family:var(--font-sans, system-ui, -apple-system, sans-serif);font-size:calc(11.5px * var(--folder-scale));font-weight:700;letter-spacing:-.01em;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.folder-doc-text{display:block;margin:0 0 calc(4px * var(--folder-scale)) 0;color:#52525b;font-family:var(--font-sans, system-ui, -apple-system, sans-serif);font-size:calc(9.5px * var(--folder-scale));line-height:1.35}.folder-doc-heading{width:56%;height:calc(7px * var(--folder-scale));flex:none;margin-bottom:calc(4px * var(--folder-scale));border-radius:999px;background:var(--folder-paper-ink-strong)}.folder-doc-line{height:calc(4px * var(--folder-scale));flex:none;border-radius:999px;background:var(--folder-paper-ink)}.folder-doc-block{height:calc(40px * var(--folder-scale));flex:none;margin:calc(3px * var(--folder-scale)) 0;border-radius:calc(5px * var(--folder-scale));background:var(--folder-paper-ink);opacity:.75}.folder-photo{position:absolute;inset:calc(5px * var(--folder-scale));overflow:hidden;border-radius:calc(3px * var(--folder-scale))}.folder-photo img{display:block;width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none}@font-face{font-family:VCR OSD Mono;src:url(/fonts/VCR_OSD_MONO.ttf) format("truetype");font-weight:400;font-style:normal;font-display:swap}:root{--bg: #000000;--surface: #0a0a0c;--surface-2: #121215;--surface-raised: #121215;--text: #f4f4f5;--text-muted: #94949e;--line: rgba(255, 255, 255, .08);--line-strong: rgba(255, 255, 255, .16);--border: rgba(255, 255, 255, .08);--border-soft: rgba(255, 255, 255, .05);--border-strong: rgba(255, 255, 255, .16);--grid: rgba(255, 255, 255, .07);--accent: #7aa7ff;--accent-soft: rgba(122, 167, 255, .12);--ok: #4ade80;--radius: 14px;--font: "VCR OSD Mono", ui-monospace, "Courier New", monospace;--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: var(--font);--font-pixel: var(--font);--mono: var(--font);--ease: cubic-bezier(.22, 1, .36, 1);color-scheme:dark}:root[data-theme=dark]{--bg: #000000;--surface: #0a0a0c;--surface-2: #121215;--surface-raised: #121215;--text: #f4f4f5;--text-muted: #94949e;--line: rgba(255, 255, 255, .08);--line-strong: rgba(255, 255, 255, .16);--border: rgba(255, 255, 255, .08);--border-soft: rgba(255, 255, 255, .05);--border-strong: rgba(255, 255, 255, .16);--grid: rgba(255, 255, 255, .07);--accent: #7aa7ff;--accent-soft: rgba(122, 167, 255, .12);--ok: #4ade80;--font-mono: var(--font);--font-pixel: var(--font);color-scheme:dark}:root[data-theme=light]{--bg: #fafaf9;--surface: #ffffff;--surface-2: #f2f2f0;--surface-raised: #f2f2f0;--text: #18181b;--text-muted: #6b6b73;--line: #e4e2df;--line-strong: rgba(24, 24, 27, .16);--border: #e4e2df;--border-soft: #e4e2df;--border-strong: rgba(24, 24, 27, .16);--grid: rgba(24, 24, 27, .06);--accent: #2563eb;--accent-soft: rgba(37, 99, 235, .08);--ok: #16a34a;color-scheme:light}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;font-weight:400;line-height:1.6;font-synthesis:none;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}button{font-family:inherit}::selection{background:var(--text);color:var(--bg)}img,video{display:block;max-width:100%}a{color:inherit;text-decoration:none}h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0;padding:0;font-weight:400}ul,ol{list-style:none}p{font-family:var(--font-sans);font-weight:400;line-height:1.65;letter-spacing:-.01em}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}.rd-container{width:min(1120px,calc(100% - 48px));margin-inline:auto}.rd-skip{position:fixed;top:-60px;left:16px;z-index:100;padding:10px 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ease,border-color .25s ease}.rd-about-pillar-card:hover{transform:translateY(-4px);border-color:var(--accent)}.rd-about-pillar-card__index{font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:.08em}.rd-about-pillar-card h4{font-size:15px;color:var(--text);font-weight:600;line-height:1.35}.rd-about-pillar-card p{font-size:13px;color:var(--muted);line-height:1.55}.rd-about-hobbies{display:flex;flex-direction:column;gap:24px}.rd-about-hobbies-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.rd-about-hobby-item{padding:22px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);display:flex;align-items:flex-start;gap:16px;transition:border-color .2s ease}.rd-about-hobby-item:hover{border-color:var(--line-strong)}.rd-about-hobby-icon{font-size:28px;line-height:1;flex-shrink:0}.rd-about-hobby-item h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:6px}.rd-about-hobby-item p{font-size:13px;color:var(--muted);line-height:1.5}.rd-about-cta-banner{padding:36px 32px;border-radius:var(--radius);background:linear-gradient(135deg,var(--surface) 0%,var(--surface-2) 100%);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}.rd-about-cta-banner__content{display:flex;flex-direction:column;gap:8px;max-width:600px}.rd-about-cta-banner__content h3{font-size:22px;color:var(--text);font-weight:600}.rd-about-cta-banner__content p{font-size:14px;color:var(--muted);line-height:1.5}.rd-about-cta-banner__actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}@media (max-width: 1024px){.rd-about-page__hero{grid-template-columns:1fr;gap:40px}.rd-about-page__side{position:static}.rd-about-pillars-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.rd-about-pillars-grid,.rd-about-hobbies-grid{grid-template-columns:1fr}.rd-about-cta-banner{padding:24px;flex-direction:column;align-items:flex-start}.rd-about-cta-banner__actions{width:100%;flex-direction:column}.rd-about-cta-banner__actions .rd-btn{width:100%;justify-content:center}}