:root{--primary:#2563eb;--primary-dark:#1d4ed8;--accent:#0ea5e9;--surface:#ffffff;--surface-muted:#f1f5f9;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--text-subtle:#334155;--shadow-soft:0 20px 45px rgba(15,23,42,0.08);--shadow-tight:0 1px 3px rgba(15,23,42,0.06);--gradient:linear-gradient(135deg,#2563eb 0%,#1d4ed8 100%);--hero-subtitle-max:840px;--inr-stage:#f8fafc;--inr-stage-elevated:var(--surface);--inr-stage-line:var(--border);--inr-stage-radial-a:rgba(37,99,235,0.07);--inr-stage-radial-b:rgba(14,165,233,0.05);--inr-noise-opacity:0.04;--inr-accent:#0284c7;--inr-accent-dim:#0369a1;--inr-accent-rgb:2,132,199;--inr-glow:rgba(2,132,199,0.22);--inr-drop-icon-bg:var(--inr-stage-elevated);--inr-drop-icon-border:var(--border);--inr-drop-heading:var(--text-main);--inr-drop-body:var(--text-muted);--inr-drop-em:var(--inr-accent);--inr-drop-active-bg:rgba(var(--inr-accent-rgb),0.08);--inr-actbar-bg:var(--surface-muted);--inr-actbar-label:var(--text-muted);--inr-btn-bg:var(--surface);--inr-btn-border:var(--border);--inr-btn-text:var(--text-subtle);--inr-btn-hover-border:var(--inr-accent);--inr-btn-hover-text:var(--text-main);--inr-primary-btn-text:#ffffff;--inr-primary-btn-bg:linear-gradient(135deg,var(--inr-accent) 0%,var(--inr-accent-dim) 100%);--inr-tabbar-bg:var(--surface-muted);--inr-tab-text:var(--text-muted);--inr-tab-text-hover:var(--text-subtle);--inr-tab-active-bg:var(--surface);--inr-tab-active-text:var(--text-main);--inr-tab-active-shadow:var(--shadow-tight);--inr-pane-bg:#fafbfc;--inr-pane-cap:var(--text-muted);--inr-badge-bg:rgba(var(--inr-accent-rgb),0.12);--inr-badge-text:var(--inr-accent-dim);--inr-canvas-bg:#eef2f7;--inr-canvas-border:var(--border);--inr-seg-active-bg:rgba(var(--inr-accent-rgb),0.1);--inr-seg-shadow:var(--shadow-tight);--inr-focus-ring:rgba(37,99,235,0.28);}
.inr-tool{margin-bottom:2.75rem;}
.inr-shell{border-radius:20px;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-soft);overflow:hidden;}
.inr-stage{position:relative;background:var(--inr-stage);min-height:min(52vh,420px);background-image:radial-gradient(circle at 20% 20%,var(--inr-stage-radial-a) 0%,transparent 45%),radial-gradient(circle at 80% 60%,var(--inr-stage-radial-b) 0%,transparent 40%);}
.inr-stage::before{content:"";position:absolute;inset:0;opacity:var(--inr-noise-opacity);background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");pointer-events:none;}
.inr-drop{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:min(52vh,420px);padding:clamp(24px,6vw,48px) 20px;text-align:center;cursor:pointer;transition:background .2s ease;border-radius:0;}
.inr-drop:focus{outline:none;}
.inr-drop:focus-visible{box-shadow:inset 0 0 0 2px var(--inr-accent);}
.inr-drop--active{background:var(--inr-drop-active-bg);}
.inr-drop-icon{width:52px;height:52px;border-radius:16px;border:1px solid var(--inr-drop-icon-border);background:var(--inr-drop-icon-bg);display:flex;align-items:center;justify-content:center;color:var(--inr-accent);font-size:1.35rem;box-shadow:var(--inr-tab-active-shadow);}
.inr-drop h2{margin:0;font-size:clamp(1.05rem,3.2vw,1.25rem);font-weight:700;color:var(--inr-drop-heading);}
.inr-drop p{margin:0;font-size:14px;color:var(--inr-drop-body);max-width:280px;line-height:1.5;}
.inr-drop .inr-drop-em{color:var(--inr-drop-em);font-weight:600;}
.inr-file{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none;}
.inr-active{padding:0;display:flex;flex-direction:column;}
.inr-active[hidden]{display:none !important;}
.inr-actbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--inr-stage-line);background:var(--inr-actbar-bg);}
.inr-actbar span{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--inr-actbar-label);}
.inr-actbtns{display:flex;flex-wrap:wrap;gap:8px;}
.inr-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:12px;font-size:13px;font-weight:600;border:1px solid var(--inr-btn-border);background:var(--inr-btn-bg);color:var(--inr-btn-text);cursor:pointer;transition:border-color .15s ease,background .15s ease,color .15s ease;box-shadow:var(--inr-tab-active-shadow);}
.inr-btn:hover{border-color:var(--inr-btn-hover-border);color:var(--inr-btn-hover-text);}
.inr-btn--primary{border:none;background:var(--inr-primary-btn-bg);color:var(--inr-primary-btn-text);box-shadow:0 1px 4px var(--inr-glow);}
.inr-btn--primary:disabled{opacity:.45;cursor:not-allowed;}
.inr-btn[hidden]{display:none !important;}
.inr-tab{position:absolute;width:0;height:0;opacity:0;pointer-events:none;}
.inr-tabbar{display:flex;margin:0;padding:4px;border-bottom:1px solid var(--inr-stage-line);background:var(--inr-tabbar-bg);}
@media (min-width:900px){.inr-tabbar{display:none;}}
.inr-tabbtn{flex:1;text-align:center;padding:12px 10px;font-size:13px;font-weight:650;color:var(--inr-tab-text);border-radius:10px;cursor:pointer;transition:background .15s ease,color .15s ease;}
.inr-tabbtn:hover{color:var(--inr-tab-text-hover);}
#inr-v-src:checked ~ .inr-tabbar label[for="inr-v-src"],#inr-v-out:checked ~ .inr-tabbar label[for="inr-v-out"]{background:var(--inr-tab-active-bg);color:var(--inr-tab-active-text);box-shadow:var(--inr-tab-active-shadow);}
.inr-panes{display:grid;gap:0;}
@media (min-width:900px){.inr-panes{grid-template-columns:1fr 1fr;gap:1px;background:var(--inr-stage-line);}}
.inr-pane{padding:14px;display:none;flex-direction:column;gap:10px;min-width:0;background:var(--inr-pane-bg);}
#inr-v-src:checked ~ .inr-panes .inr-pane--src{display:flex;}
#inr-v-out:checked ~ .inr-panes .inr-pane--out{display:flex;}
@media (min-width:900px){.inr-panes .inr-pane--src,.inr-panes .inr-pane--out{display:flex !important;}}
.inr-pane-cap{display:flex;align-items:center;justify-content:space-between;gap:8px;}
.inr-pane-cap span{font-size:10px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--inr-pane-cap);}
.inr-badge{font-size:10px;padding:4px 9px;border-radius:999px;background:var(--inr-badge-bg);color:var(--inr-badge-text);font-weight:650;}
.inr-canvas-slot{border-radius:14px;border:1px solid var(--inr-canvas-border);background:var(--inr-canvas-bg);overflow:auto;max-height:min(62vh,560px);-webkit-overflow-scrolling:touch;}
.inr-canvas-slot canvas{display:block;margin:0 auto;vertical-align:top;}
.inr-sheet{border-top:1px solid var(--border);background:var(--surface-muted);}
.inr-sheet summary{list-style:none;cursor:pointer;padding:16px 18px;font-size:14px;font-weight:700;color:var(--text-main);display:flex;align-items:center;justify-content:space-between;gap:12px;}
.inr-sheet summary::-webkit-details-marker{display:none;}
.inr-sheet summary::after{content:"+";font-weight:400;color:var(--text-muted);font-size:1.25rem;line-height:1;}
.inr-sheet[open] summary::after{content:"-";}
.inr-sheet-body{padding:0 18px 20px;display:flex;flex-direction:column;gap:18px;}
.inr-mode{display:flex;flex-direction:column;gap:8px;}
.inr-mode > span{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);}
.inr-segwrap{display:flex;flex-wrap:wrap;gap:6px;}
.inr-seg{position:absolute;opacity:0;width:0;height:0;}
.inr-seg:focus-visible + .inr-segl{border-color:var(--primary);box-shadow:0 0 0 2px var(--inr-focus-ring);}
.inr-segl{display:inline-flex;align-items:center;padding:10px 12px;border-radius:10px;font-size:12px;font-weight:650;color:var(--text-muted);border:1px solid var(--border);background:var(--surface);cursor:pointer;transition:all .15s ease;}
.inr-seg:checked + .inr-segl{color:var(--text-main);border-color:var(--inr-accent);background:var(--inr-seg-active-bg);box-shadow:var(--inr-seg-shadow);}
.inr-slider label{display:flex;justify-content:space-between;align-items:center;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:8px;}
.inr-slider .inr-val{font-variant-numeric:tabular-nums;color:var(--text-main);}
.inr-range{width:100%;height:6px;border-radius:99px;background:var(--border);appearance:none;cursor:pointer;}
.inr-range::-webkit-slider-thumb{appearance:none;width:20px;height:20px;border-radius:50%;background:var(--inr-accent);border:2px solid var(--surface);box-shadow:0 1px 6px var(--inr-glow);}
.inr-range::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--inr-accent);border:2px solid var(--surface);}
.inr-toggles{display:flex;flex-direction:column;gap:12px;}
.inr-switch{display:flex;align-items:flex-start;gap:12px;cursor:pointer;}
.inr-switch input{flex-shrink:0;width:18px;height:18px;margin-top:2px;accent-color:var(--inr-accent);}
.inr-switch div{display:flex;flex-direction:column;gap:2px;}
.inr-switch strong{font-size:14px;font-weight:650;color:var(--text-main);}
.inr-switch span{font-size:13px;line-height:1.45;color:var(--text-muted);}
.inr-article{margin-top:2.5rem;padding-bottom:2rem;}
.inr-article section{margin-bottom:2.5rem;}
.inr-article h2{font-size:clamp(1.2rem,3vw,1.45rem);font-weight:700;margin:0 0 .85rem;color:var(--text-main);}
.inr-article h3{font-size:1.05rem;font-weight:650;margin:1.35rem 0 .45rem;color:var(--text-main);}
.inr-article p{font-size:15px;line-height:1.68;color:var(--text-muted);margin:0 0 .9rem;}
.inr-article ul{margin:0 0 1rem;padding-left:1.2rem;color:var(--text-muted);font-size:15px;line-height:1.62;}
.inr-article li{margin-bottom:.4rem;}
.inr-callout{border-left:4px solid var(--inr-accent);padding:14px 18px;background:var(--surface-muted);border-radius:0 14px 14px 0;margin:1.35rem 0;}
.inr-callout p{margin:0;font-size:14px;line-height:1.65;color:var(--text-muted);}
.inr-callout p + p{margin-top:.65rem;}
.inr-tablewrap{overflow-x:auto;margin:1.1rem 0;border-radius:14px;border:1px solid var(--border);}
.inr-table{width:100%;border-collapse:collapse;font-size:14px;}
.inr-table th,.inr-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top;}
.inr-table th{background:var(--surface-muted);font-weight:650;color:var(--text-main);}
.inr-table td{color:var(--text-muted);}
.inr-table tr:last-child td{border-bottom:none;}
.internal-link{color:var(--primary);font-weight:600;text-decoration:underline;text-underline-offset:2px;}
.internal-link:hover{color:var(--primary-dark);}
.inr-footnote{font-size:13px;color:var(--text-muted);margin-top:2rem;}