:root{--ycs-accent:#0d9488;--ycs-accent-soft:rgba(13,148,136,0.12);--ycs-accent-border:rgba(13,148,136,0.35);--ycs-code-surface:rgba(15,23,42,0.04);--ycs-code-surface-dark:rgba(15,23,42,0.85);--ycs-radius:14px;--ycs-radius-sm:10px;--ycs-font-mono:ui-monospace,"Cascadia Code","Source Code Pro",Menlo,Consolas,monospace;--text-main:#0f172a;--text-muted:#64748b;--surface:#ffffff;--surface-muted:#f1f5f9;--border:#e2e8f0;--shadow-soft:0 8px 30px rgba(15,23,42,0.08);--primary:#0d9488;--success:#059669;--danger:#dc2626;}
.ycs-page{padding-bottom:2.5rem;}
.ycs-rail-wrap{margin:0 -0.75rem 1rem;padding:0 0.75rem;overflow:hidden;}
@media (min-width:768px){.ycs-rail-wrap{margin:0 0 1.25rem;padding:0;}}
.ycs-rail{display:flex;gap:0.5rem;overflow-x:auto;padding-bottom:0.35rem;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:thin;}
.ycs-rail::-webkit-scrollbar{height:4px;}
.ycs-rail::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px;}
.ycs-rail-link{flex:0 0 auto;scroll-snap-align:start;display:inline-flex;align-items:center;gap:0.35rem;padding:0.5rem 0.85rem;border-radius:999px;font-size:0.8125rem;font-weight:600;text-decoration:none;color:var(--text-main);background:var(--surface);border:1px solid var(--border);transition:background 0.15s ease,border-color 0.15s ease,color 0.15s ease;}
.ycs-rail-link:hover,.ycs-rail-link:focus-visible{color:var(--ycs-accent);border-color:var(--ycs-accent-border);background:var(--ycs-accent-soft);outline:none;}
.ycs-rail-dot{width:6px;height:6px;border-radius:50%;background:var(--ycs-accent);}
.ycs-tool-surface{display:flex;flex-direction:column;gap:1.5rem;margin-bottom:2rem;}
.ycs-play-dock{border-radius:var(--ycs-radius);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-soft,0 8px 30px rgba(15,23,42,0.06));overflow:hidden;}
.ycs-play-head{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:0.75rem;padding:1rem 1.1rem;border-bottom:1px solid var(--border);background:linear-gradient(180deg,var(--ycs-accent-soft),transparent);}
.ycs-play-kicker{font-size:0.7rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--ycs-accent);margin:0 0 0.2rem;}
.ycs-play-title{margin:0;font-size:1.05rem;font-weight:700;line-height:1.3;color:var(--text-main);}
.ycs-play-meta{margin:0.15rem 0 0;font-size:0.8125rem;color:var(--text-muted);max-width:36rem;}
.ycs-kbd{font-family:var(--ycs-font-mono);font-size:0.7rem;padding:0.15rem 0.4rem;border-radius:6px;border:1px solid var(--border);background:var(--surface-muted,var(--surface));color:var(--text-muted);}
.ycs-play-body{padding:1rem 1.1rem 1.1rem;}
.ycs-form{display:flex;flex-direction:column;gap:0.85rem;}
.ycs-label-row{display:flex;align-items:center;justify-content:space-between;gap:0.75rem;flex-wrap:wrap;}
.ycs-label{display:block;font-size:0.875rem;font-weight:600;color:var(--text-main);}
.ycs-hint{display:flex;align-items:flex-start;gap:0.5rem;padding:0.65rem 0.75rem;border-radius:var(--ycs-radius-sm);font-size:0.8125rem;line-height:1.45;color:var(--text-muted);background:var(--surface-muted,var(--surface));border:1px solid var(--border);}
.ycs-hint svg{flex-shrink:0;margin-top:0.1rem;opacity:0.75;}
.ycs-textarea{width:100%;min-height:min(52vh,420px);padding:0.85rem 1rem;border-radius:var(--ycs-radius-sm);border:1px solid var(--border);background:var(--ycs-code-surface);color:var(--text-main);font-family:var(--ycs-font-mono);font-size:0.8125rem;line-height:1.55;resize:vertical;transition:border-color 0.15s ease,box-shadow 0.15s ease;}
.ycs-textarea:focus{outline:none;border-color:var(--ycs-accent);box-shadow:0 0 0 3px var(--ycs-accent-soft);}
.ycs-textarea::placeholder{color:var(--text-muted);opacity:0.7;}
.ycs-status-line{display:flex;align-items:center;gap:0.4rem;font-size:0.8125rem;color:var(--text-muted);}
.ycs-status-line svg{flex-shrink:0;}
.ycs-actions{display:flex;flex-wrap:wrap;gap:0.5rem;}
.ycs-btn{display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;padding:0.65rem 1rem;border-radius:var(--ycs-radius-sm);font-size:0.875rem;font-weight:600;border:none;cursor:pointer;transition:transform 0.12s ease,opacity 0.12s ease,background 0.15s ease;}
.ycs-btn:active{transform:scale(0.98);}
.ycs-btn-primary{background:var(--ycs-accent);color:#fff;}
.ycs-btn-primary:hover,.ycs-btn-primary:focus-visible{background:#0f766e;outline:none;}
.ycs-btn-ghost{background:transparent;color:var(--text-main);border:1px solid var(--border);}
.ycs-btn-ghost:hover,.ycs-btn-ghost:focus-visible{border-color:var(--ycs-accent-border);color:var(--ycs-accent);background:var(--ycs-accent-soft);outline:none;}
.ycs-validation-banner{border-radius:var(--ycs-radius-sm);padding:0.75rem 0.9rem;font-size:0.875rem;line-height:1.45;margin-top:0.25rem;display:none;}
.ycs-validation-banner.success{border:1px solid rgba(16,185,129,0.45);background:rgba(16,185,129,0.1);}
.ycs-validation-banner.error{border:1px solid rgba(239,68,68,0.45);background:rgba(239,68,68,0.08);}
.validation-banner{border-radius:var(--ycs-radius-sm);padding:0.75rem 0.9rem;font-size:0.875rem;line-height:1.45;margin-top:0.25rem;}
.validation-message{font-weight:600;white-space:pre-wrap;}
.validation-message.success{color:var(--success,#059669);}
.validation-message.error{color:var(--danger,#dc2626);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.ycs-atlas{border-radius:var(--ycs-radius);border:1px solid var(--border);background:var(--surface);overflow:hidden;}
.ycs-atlas-head{padding:1rem 1.1rem;border-bottom:1px solid var(--border);}
.ycs-atlas-title{margin:0;font-size:1.05rem;font-weight:700;color:var(--text-main);}
.ycs-atlas-lead{margin:0.35rem 0 0;font-size:0.875rem;color:var(--text-muted);line-height:1.5;}
.ycs-details{border-bottom:1px solid var(--border);}
.ycs-details:last-child{border-bottom:none;}
.ycs-details>summary{list-style:none;cursor:pointer;padding:0.9rem 1.1rem;font-weight:600;font-size:0.9375rem;color:var(--text-main);display:flex;align-items:center;justify-content:space-between;gap:0.75rem;user-select:none;}
.ycs-details>summary::-webkit-details-marker{display:none;}
.ycs-details>summary::after{content:"+";font-weight:400;font-size:1.15rem;color:var(--text-muted);transition:transform 0.2s ease;}
.ycs-details[open]>summary::after{transform:rotate(45deg);color:var(--ycs-accent);}
.ycs-details>summary:hover,.ycs-details>summary:focus-visible{background:var(--surface-muted,var(--surface));outline:none;}
.ycs-details-body{padding:0 1.1rem 1rem;font-size:0.875rem;line-height:1.55;color:var(--text-muted);}
.ycs-snippet{display:block;margin:0.5rem 0;padding:0.65rem 0.75rem;border-radius:var(--ycs-radius-sm);background:var(--ycs-code-surface);border:1px solid var(--border);font-family:var(--ycs-font-mono);font-size:0.78rem;line-height:1.5;color:var(--text-main);overflow-x:auto;}
.ycs-pill-row{display:flex;flex-wrap:wrap;gap:0.4rem;margin-top:0.5rem;}
.ycs-pill{font-size:0.75rem;padding:0.2rem 0.5rem;border-radius:999px;background:var(--ycs-accent-soft);color:var(--text-main);font-weight:600;}
.ycs-dl{margin:0.5rem 0 0;padding:0;}
.ycs-dl dt{margin:0.65rem 0 0.15rem;font-weight:600;color:var(--text-main);font-size:0.8125rem;}
.ycs-dl dt:first-child{margin-top:0;}
.ycs-dl dd{margin:0;padding-left:0;color:var(--text-muted);}
.ycs-callout{margin-top:0.75rem;padding:0.65rem 0.75rem;border-left:3px solid var(--ycs-accent);border-radius:0 var(--ycs-radius-sm) var(--ycs-radius-sm) 0;background:var(--ycs-accent-soft);font-size:0.8125rem;color:var(--text-main);}
.ycs-share{border-radius:var(--ycs-radius);border:1px dashed var(--border);padding:1rem 1.1rem;background:var(--surface-muted,var(--surface));}
.ycs-share-title{margin:0 0 0.65rem;font-size:0.8125rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);}
.ycs-share-grid{display:flex;flex-wrap:wrap;gap:0.45rem;}
.ycs-share-grid .share-btn{flex:1 1 auto;min-width:calc(50% - 0.25rem);justify-content:center;}
@media (min-width:480px){.ycs-share-grid .share-btn{min-width:8.5rem;flex:0 1 auto;}}
.ycs-prose-outer{padding:2rem 0 2.5rem;margin-top:0.5rem;}
.ycs-prose{margin:0 auto;}
.ycs-prose h2{font-size:clamp(1.25rem,4vw,1.6rem);font-weight:700;margin:0 0 0.75rem;line-height:1.25;letter-spacing:-0.02em;color:var(--text-main);}
.ycs-prose h3{font-size:1rem;font-weight:700;margin:1.5rem 0 0.5rem;color:var(--text-main);}
.ycs-prose p{margin:0 0 0.85rem;font-size:0.9375rem;line-height:1.65;color:var(--text-muted);}
.ycs-prose p:last-child{margin-bottom:0;}
.ycs-prose ul{margin:0.5rem 0 1rem;padding-left:1.15rem;color:var(--text-muted);font-size:0.9375rem;line-height:1.55;}
.ycs-prose li{margin-bottom:0.35rem;}
.ycs-prose table{width:100%;border-collapse:collapse;font-size:0.8125rem;margin:0.75rem 0 1rem;}
.ycs-prose th,.ycs-prose td{padding:0.55rem 0.65rem;border:1px solid var(--border);text-align:left;vertical-align:top;}
.ycs-prose th{background:var(--surface);color:var(--text-main);font-weight:600;}
.ycs-prose td{color:var(--text-muted);}
.ycs-prose a{color:var(--primary,var(--ycs-accent));text-underline-offset:2px;}
.ycs-prose .ycs-inline-warn{margin:1rem 0;padding:0.75rem 0.85rem;border-radius:var(--ycs-radius-sm);border:1px solid rgba(234,179,8,0.45);background:rgba(234,179,8,0.1);font-size:0.875rem;color:var(--text-main);}
#ycs-play{scroll-margin-top:5.5rem;}
#ycs-atlas{scroll-margin-top:5.5rem;}
#ycs-share{scroll-margin-top:5.5rem;}
@media (prefers-color-scheme:dark){.ycs-textarea{background:rgba(255,255,255,0.04);}.ycs-snippet{background:rgba(255,255,255,0.06);}}
.ycs-share .share-btn{display:inline-flex;align-items:center;justify-content:center;padding:0.55rem 0.85rem;border-radius:var(--ycs-radius-sm);font-size:0.8125rem;font-weight:600;text-decoration:none;color:#fff;border:none;min-height:2.45rem;transition:opacity 0.15s ease,transform 0.12s ease;}
.ycs-share .share-btn:hover,.ycs-share .share-btn:focus-visible{opacity:0.92;transform:translateY(-1px);outline:none;}
.ycs-share .share-x{background:#0f1419;}
.ycs-share .share-facebook{background:#1877f2;}
.ycs-share .share-linkedin{background:#0a66c2;}
.ycs-share .share-reddit{background:#ff4500;}
.ycs-share .share-telegram{background:#0088cc;}
.ycs-share .share-whatsapp{background:#25d366;}