@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{--paper:#f7f7f2;--panel:#fff;--ink:#243f34;--muted:#7a8179;--line:#e4e7dd;--green:#315641;--orange:#df793f;--pale:#edf1e8;--shadow:0 14px 38px #283e2d08;font-family:'DM Sans',Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button{border:0;background:none}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d17a3e;outline-offset:4px}button{transition:background .18s,transform .18s,color .18s}button:hover:not(:disabled){filter:brightness(.96)}button:active:not(:disabled){transform:translateY(1px)}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-defs{position:absolute;width:0;height:0}h1,h2,h3,h4,p{margin:0}h1,h2,h3{font-family:Manrope,'DM Sans',Arial,sans-serif}a{color:inherit;text-decoration:none}[hidden]{display:none!important}
.topbar{height:86px;display:flex;align-items:center;justify-content:space-between;padding:0 34px;border-bottom:1px solid var(--line);background:#fcfcf8;gap:24px}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:550;letter-spacing:-.8px;line-height:.85}.brand-mark{height:39px;width:39px;background:var(--ink);border-radius:11px;color:var(--paper);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:500;position:relative}.brand-mark span{font-size:19px;position:absolute;right:2px;top:3px;color:#e0ae70}.brand-atlas{font-weight:800}.orange-dot{color:var(--orange)}.main-nav{display:flex;align-items:center;gap:7px;padding:5px;background:#f0f2eb;border:1px solid #e8ebdf;border-radius:12px}.nav-tab{display:flex;align-items:center;gap:9px;font-size:12px;font-weight:600;padding:11px 16px;border-radius:8px;color:#7b8479;white-space:nowrap}.nav-tab svg{width:16px;height:16px}.nav-tab.active{background:white;color:var(--ink);box-shadow:0 2px 4px #243f3410}.nav-count{font-size:10px;border:1px solid #d5ddcd;border-radius:4px;padding:1px 4px}.help-button{display:flex;align-items:center;gap:8px;font-size:12px;color:#6d776d}.help-button svg{width:17px}
.app-shell{display:grid;grid-template-columns:249px minmax(0,1fr);max-width:1920px;margin:auto}.sidebar{padding:35px 23px 23px;border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:calc(100vh - 86px)}.sidebar-top{display:flex;flex-direction:column;gap:10px}.eyebrow,.section-label,.breadcrumb,.edition{font-size:9px;font-weight:700;letter-spacing:1.7px}.sidebar-top .eyebrow{color:var(--orange)}.edition{font-size:8px;letter-spacing:1.4px;color:#8b9487}.sidebar h1{font-size:27px;line-height:1.3;letter-spacing:-1.4px;margin-top:19px;font-weight:650}.intro{color:var(--muted);font-size:12px;line-height:1.8;margin-top:13px}.divider{height:1px;background:var(--line);margin:26px 0}.section-label{display:flex;align-items:center;justify-content:space-between;font-size:8px;letter-spacing:1.3px;color:#778172;margin-bottom:13px}.section-label svg{width:14px;height:14px}.section-label #progress-label{letter-spacing:.5px}.lesson-list{display:grid;gap:9px;margin:0 -9px}.lesson{display:flex;text-align:left;gap:10px;align-items:center;padding:13px 9px;border:1px solid transparent;border-radius:10px}.lesson.active{background:#eaf0e3;border-color:#dce4d5}.lesson-number{font-family:Manrope,sans-serif;color:#8a9980;font-size:11px;font-weight:700}.lesson.active .lesson-number{color:#497445}.lesson strong{display:block;font-size:11px;font-weight:650}.lesson small{display:block;font-size:9px;color:#879080;margin-top:4px}.lesson>svg{width:14px;height:14px;margin-left:auto;color:#6b8660}.lesson:not(.active)>svg{visibility:hidden}.lesson.completed .lesson-number{color:#438543}.toggle-row{position:relative;display:flex;align-items:center;justify-content:space-between;font-size:11px;padding:11px 0;cursor:pointer}.toggle-row>span:first-child{display:flex;align-items:center;gap:9px}.layer-dot{width:6px;height:6px;display:inline-block;border-radius:2px}.green{background:#527755}.orange{background:var(--orange)}.blue{background:#7d9ca4}.toggle-row input{opacity:0;position:absolute;right:0;width:32px;height:20px;z-index:1;cursor:pointer}.switch{height:16px;width:28px;background:#dce1d7;border-radius:12px;padding:3px;transition:.2s}.switch:after{content:'';display:block;background:white;border-radius:50%;height:10px;width:10px;transition:.2s;box-shadow:0 1px 2px #0002}input:checked+.switch{background:#54784b}input:checked+.switch:after{transform:translateX(12px)}input:focus-visible+.switch{outline:2px solid var(--orange);outline-offset:3px}.field-note{display:flex;gap:9px;padding:15px 10px;background:#eeefe6;border-radius:10px;margin-top:34px}.note-star{font-size:24px;color:#9cae7f}.field-note strong{font-size:10px;font-weight:600}.field-note p{font-size:10px;line-height:1.8;color:#858c7e;margin-top:5px}.sidebar-bottom{font-size:7px;letter-spacing:1.2px;color:#8a9184;display:flex;gap:6px;align-items:center;margin-top:auto;padding-top:35px}.live-dot{width:6px;height:6px;border-radius:50%;background:#769c58;display:inline-block;box-shadow:0 0 0 3px #769c580e}
.workspace{padding:30px 29px 0;min-width:0}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:24px}.breadcrumb{font-size:8px;color:#909889;letter-spacing:1.5px;margin-bottom:11px}.breadcrumb>span:first-child{padding:0 8px;color:#bec4b5}.breadcrumb>span:last-child{color:#496144}.workspace-heading h2{font-size:clamp(21px,2.1vw,34px);font-weight:650;letter-spacing:-1.2px;line-height:1.25}.workspace-heading p{color:#8b9386;font-size:11px;margin-top:8px}.level-pill{font-size:9px;color:#728065;padding:7px 10px;border:1px solid #dde5d5;border-radius:20px;white-space:nowrap;background:#f0f3e9}.level-pill>span{display:inline-block;width:5px;height:5px;background:#83a85c;border-radius:50%;margin-right:5px}
.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 252px;gap:18px}.scene-panel{height:480px;position:relative;overflow:hidden;background:#ecefe5;border:1px solid #e1e6d8;border-radius:17px;box-shadow:inset 0 0 80px #fff8}.scene-top{position:absolute;top:19px;left:21px;right:21px;display:flex;align-items:center;justify-content:space-between;z-index:2;pointer-events:none}.scene-status{display:flex;gap:7px;align-items:center;font-size:8px;letter-spacing:1.4px;font-weight:600}.scene-top>span{font-size:7px;letter-spacing:1px;color:#8f9885}#scene{position:absolute;inset:0;touch-action:none}#scene canvas{display:block;width:100%;height:100%}#device-labels{position:absolute;inset:0;pointer-events:none}.device-label{position:absolute;transform:translate(-50%,0);font-size:8px;text-align:center;white-space:nowrap;pointer-events:auto;background:#fbfcf4e8;border:1px solid #d9dfcd;border-radius:5px;padding:5px 9px;box-shadow:0 3px 8px #34473108;line-height:1.3}.device-label.active{background:var(--green);color:white;border-color:var(--green)}.device-label .ip{font-family:Consolas,monospace;font-size:8px;display:block;opacity:.7;margin-top:3px}.device-label .device-index{font-size:7px;color:#97a18d;margin-right:4px}.device-label.active .device-index{color:#bdcfae}.scene-bottom{position:absolute;bottom:15px;left:18px;right:16px;display:flex;justify-content:space-between;align-items:center;gap:8px}.scene-bottom>span{font-size:8px;color:#8a927e;display:flex;align-items:center;gap:5px}.scene-bottom>span svg{width:12px;height:12px}.scene-bottom i{font-style:normal;margin:0 2px}.camera-controls{display:flex;align-items:center;gap:2px;background:#ffffffe0;padding:4px;border:1px solid #e1e6d5;border-radius:7px}.camera-controls button{height:25px;width:25px;border-radius:4px;font-size:16px;color:#5a6c4f}.camera-controls button[aria-pressed=true]{background:#e1eacb}.camera-controls svg{height:13px;width:13px}.network-legend{position:absolute;left:21px;bottom:60px;display:flex;gap:14px;font-size:7px;color:#8a9680}.network-legend span{display:flex;gap:5px;align-items:center}.legend-line{width:15px;height:2px;background:#849c69;display:inline-block}.legend-line.orange{background:#d59e68}#scene-loading{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px;background:#eff2e9;z-index:5;font-size:12px}.loader{width:28px;height:28px;border:2px solid #dbe2cf;border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.inspector{background:#294637;color:#eaf0e3;border-radius:17px;padding:23px 22px;position:relative;overflow:hidden;display:flex;flex-direction:column}.inspector:after{content:'';position:absolute;right:-55px;top:58px;border:1px solid #ffffff08;border-radius:50%;width:150px;height:150px;pointer-events:none}.inspector-top{display:flex;justify-content:space-between;align-items:center;color:#aec3a5;font-size:8px;letter-spacing:1.5px}.inspector-top svg{width:14px;height:14px}.inspector-hero{padding-top:24px}.device-icon{display:flex;align-items:center;justify-content:center;width:47px;height:47px;border:1px solid #b5d09628;border-radius:12px;color:#ccdfae;background:#ffffff06;margin-bottom:17px}.device-icon svg{width:25px;height:25px}#inspector-badge{font-size:7px;letter-spacing:1.5px;color:#a3bd94}.inspector h3{font-size:26px;font-weight:500;letter-spacing:-.7px;margin-top:7px}.inspector-hero p{font-size:11px;line-height:1.85;color:#bac9b3;margin-top:12px}.inspector-content{margin-top:22px}#inspector-content{margin-top:22px}.spec-row{display:flex;justify-content:space-between;font-size:9px;border-bottom:1px solid #ffffff12;padding:10px 0;color:#a6bda0;gap:10px}.spec-row span:last-child{font-family:Consolas,monospace;color:#e4ecda;text-align:right}.did-you-know{border:1px solid #abc49d25;border-radius:8px;padding:12px;margin-top:19px;background:#ffffff03}.did-you-know strong{font-size:8px;letter-spacing:1px;color:#d5e3bb;display:flex;gap:6px;align-items:center}.did-you-know svg{width:12px;height:12px}.did-you-know p{font-size:10px;line-height:1.7;color:#a8bca1;margin-top:6px}.inspect-action{margin-top:16px;display:flex;gap:8px;align-items:center;font-size:10px;color:#e4eebf;padding:0}.inspect-action svg{width:14px;height:14px}
.journey-panel,.packet-guide,.challenge-panel{border:1px solid var(--line);border-radius:15px;background:#fdfdf9;padding:22px 23px;margin-top:20px;box-shadow:var(--shadow)}.journey-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.journey-heading .eyebrow,.packet-guide .eyebrow,.challenge-panel .eyebrow{font-size:7px;color:#8b9881;letter-spacing:1.5px}.journey-heading h3,.packet-guide h3,.challenge-panel h3{font-size:16px;font-weight:600;letter-spacing:-.35px;margin-top:6px}.journey-actions{display:flex;align-items:center;gap:10px}.icon-button{padding:5px}.icon-button svg{height:15px;width:15px;color:#94a084}.journey-actions select{font-size:9px;color:#7f8b74;border:0;background:transparent;padding:7px 1px;cursor:pointer}.primary-button{display:flex;align-items:center;justify-content:center;gap:9px;background:#df7942;color:white;border:1px solid #d8753e;border-radius:8px;padding:11px 17px;font-size:10px;font-weight:600;box-shadow:0 3px 6px #a1602315;white-space:nowrap}.primary-button svg{width:13px;height:13px}.timeline{display:flex;margin:25px 0 19px;position:relative;gap:0}.timeline:before{content:'';position:absolute;left:20px;right:20px;top:13px;height:1px;background:#e5e8dc}.timeline-step{flex:1;position:relative;text-align:left;display:flex;flex-direction:column;align-items:flex-start;padding:0 5px;font-size:9px;gap:8px;color:#8c9583}.timeline-step>span{width:27px;height:27px;display:flex;align-items:center;justify-content:center;border:1px solid #e0e5d6;border-radius:50%;background:#fcfcf7;font-size:8px;position:relative;z-index:1}.timeline-step.active>span{background:var(--green);border-color:var(--green);color:white;box-shadow:0 0 0 4px #dbe8d380}.timeline-step.done>span{background:#e9f0df;color:#52743e;border-color:#d7e3ca}.timeline-step.active{color:var(--ink);font-weight:650}.timeline-step:last-child{align-items:flex-end}.step-explanation{border-top:1px solid #e9ece1;padding-top:14px;display:grid;grid-template-columns:125px 1fr auto;gap:14px;align-items:center}.step-explanation>span{font-size:7px;letter-spacing:1px;color:#81946f;font-weight:600}.step-explanation p{font-size:10px;color:#87907e;line-height:1.7}.step-explanation button{display:flex;align-items:center;gap:6px;font-size:9px;white-space:nowrap}.step-explanation svg{width:13px;height:13px}.workspace-footer{display:flex;justify-content:space-between;gap:14px;padding:19px 0;font-size:7px;letter-spacing:.7px;color:#9ba391}.workspace-footer>span:last-child{letter-spacing:0}.workspace-footer i{font-style:normal;margin:0 6px}.workspace-footer button{color:#708565;font-size:7px;margin-left:7px;padding:0}
#packet-caption{position:absolute;top:65px;left:23px;pointer-events:none}#packet-caption .eyebrow{font-size:7px;color:#8e9b7c}#packet-caption h3{font-size:22px;font-weight:550;letter-spacing:-.7px;margin-top:8px}#packet-caption p{font-size:10px;color:#8d9883;margin-top:6px}#explode-controls{position:absolute;bottom:58px;left:50%;transform:translateX(-50%);width:70%;max-width:340px;background:#ffffffeb;border:1px solid #e2e7d9;padding:13px 17px;border-radius:11px;box-shadow:var(--shadow)}#explode-controls label{display:flex;align-items:center;gap:8px;font-size:10px;font-weight:600}#explode-controls svg{width:14px;height:14px}#explode-value{margin-left:auto;color:var(--orange);font-family:Consolas,monospace}input[type=range]{width:100%;accent-color:var(--green);height:4px;margin:17px 0 11px;cursor:pointer}#explode-controls>div{display:flex;justify-content:space-between;font-size:8px;color:#8b9481}.packet-guide p,.challenge-panel>div>p{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.7}.layer-buttons{display:flex;gap:12px;margin-top:20px}.layer-button{flex:1;text-align:left;padding:13px;border:1px solid #e3e8d9;background:#f4f6ee;border-radius:8px;font-size:10px}.layer-button.active{border-color:#789168;background:#e8f0de}.layer-button strong{display:block;margin-bottom:5px;font-weight:600}.layer-button small{color:#869579;font-size:9px}.layer-button i{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:5px;background:var(--dot)}
.challenge-options{display:flex;gap:9px;margin-top:18px}.challenge-choice{flex:1;border:1px solid #e0e5d8;background:#f5f6ef;border-radius:8px;padding:13px 12px;text-align:left;font-size:11px;line-height:1.5;display:flex;gap:9px;align-items:center}.challenge-choice>span{width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:white;border:1px solid #dde5d2;border-radius:5px;font-size:9px;flex-shrink:0}.challenge-choice.correct{background:#e6efdb;border-color:#92ac75}.challenge-choice.wrong{background:#fbebe1;border-color:#dba17d}.challenge-footer{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:16px;font-size:10px;color:#839475;line-height:1.7}.secondary-button{display:flex;align-items:center;gap:7px;white-space:nowrap;font-size:10px;color:var(--green);padding:8px 0}.secondary-button svg{width:13px}.fault-badge{color:#ebac73!important}dialog{max-width:550px;width:calc(100% - 32px);padding:40px;border:1px solid var(--line);border-radius:22px;background:var(--paper);color:var(--ink);box-shadow:0 25px 90px #17291e30}dialog::backdrop{background:#263f3266;backdrop-filter:blur(6px)}.dialog-close{position:absolute;right:16px;top:13px;font-size:26px;color:#809078}dialog>.eyebrow{color:var(--orange);font-size:8px}dialog h2{font-size:31px;letter-spacing:-1.3px;line-height:1.3;margin:15px 0}dialog>p{font-size:12px;line-height:1.8;color:#7f8c75}.help-steps{display:grid;gap:15px;margin:24px 0}.help-steps>div{display:flex;gap:14px;font-size:11px;line-height:1.7;color:#7b8870}.help-steps span{color:var(--orange);font-size:10px;font-weight:600;padding-top:3px}.help-steps strong{color:var(--ink)}.model-note{font-size:9px;line-height:1.8;color:#909a85;border-top:1px solid var(--line);padding-top:16px;margin-bottom:23px}#toast{position:fixed;bottom:23px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:white;padding:12px 20px;border-radius:10px;font-size:12px;box-shadow:0 8px 25px #0002;transition:.3s;z-index:20}#toast.visible{transform:translate(-50%,0);opacity:1}
@media(min-width:1500px){.sidebar{padding:40px 28px}.app-shell{grid-template-columns:270px minmax(0,1fr)}.workspace{padding:36px 38px 0}.lab-grid{grid-template-columns:minmax(0,1fr) 290px;gap:23px}.scene-panel{height:530px}.inspector{padding:26px}.inspector-hero p{font-size:12px}.inspector h3{font-size:30px}.spec-row{font-size:11px}.did-you-know p{font-size:11px}.lesson strong{font-size:12px}.scene-top>span,.scene-status{font-size:9px}.device-label{font-size:10px}.scene-bottom>span{font-size:9px}.network-legend{font-size:9px}.journey-heading h3{font-size:19px}.timeline-step{font-size:11px}.step-explanation p{font-size:11px}}
@media(max-width:1150px){.app-shell{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding:27px 17px}.sidebar h1{font-size:24px}.workspace{padding:25px 20px 0}.lab-grid{grid-template-columns:minmax(0,1fr) 215px;gap:12px}.inspector{padding:19px 17px}.inspector h3{font-size:23px}.scene-panel{height:475px}.topbar{padding:0 22px;gap:12px}.nav-tab{padding:10px;font-size:11px}.level-pill{display:none}.scene-bottom>span{max-width:145px;font-size:7px;flex-wrap:wrap}.journey-heading{align-items:flex-start}.journey-heading h3{max-width:260px}.primary-button{padding:10px 12px}.step-explanation{grid-template-columns:100px 1fr auto;gap:8px}}
@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}.topbar{height:72px}.help-button span{display:none}.workspace{padding:22px}.lab-grid{grid-template-columns:minmax(0,1fr) 235px}.scene-panel{height:470px}.workspace-heading h2{font-size:28px}.scene-top>span{font-size:6px}.workspace-footer{padding-bottom:22px}}
@media(max-width:620px){.topbar{height:auto;min-height:114px;padding:15px 17px 11px;flex-wrap:wrap;gap:14px}.brand{font-size:21px}.brand-mark{width:33px;height:33px;font-size:21px}.main-nav{order:3;width:100%;justify-content:space-between;padding:3px;gap:1px}.nav-tab{font-size:10px;padding:8px 9px;gap:5px}.nav-tab svg{width:13px}.nav-count{display:none}.workspace{padding:22px 14px 0}.workspace-heading{margin-bottom:18px}.workspace-heading h2{font-size:25px;letter-spacing:-.9px}.workspace-heading p{font-size:10px;line-height:1.6}.lab-grid{grid-template-columns:1fr}.scene-panel{height:400px;border-radius:13px}.inspector{padding:19px;border-radius:13px}.inspector-hero{padding-top:14px;position:relative}.device-icon{float:left;margin-right:14px;margin-bottom:5px;width:40px;height:40px}.inspector h3{font-size:23px;margin-top:3px}.inspector-hero p{clear:both;padding-top:9px;font-size:11px}.inspector-content,#inspector-content{margin-top:10px}.did-you-know{margin-top:13px}.inspector .spec-row{font-size:10px;padding:8px 0}.journey-panel,.packet-guide,.challenge-panel{padding:18px 15px}.journey-heading{flex-direction:column;gap:16px}.journey-heading h3{max-width:none;font-size:16px}.journey-actions{width:100%;justify-content:flex-end}.journey-actions .primary-button{margin-left:auto}.timeline{margin:23px 0 18px}.timeline-step{font-size:8px;padding:0 3px;gap:7px}.timeline-step>span{width:24px;height:24px}.step-explanation{grid-template-columns:1fr auto}.step-explanation>span{grid-column:1/-1}.step-explanation p{font-size:10px}.workspace-footer{flex-direction:column;gap:9px;line-height:1.6}.layer-buttons{display:grid;grid-template-columns:1fr 1fr;gap:8px}.challenge-options{flex-direction:column}.challenge-footer{align-items:flex-start}.device-label{font-size:7px;padding:4px 6px}.scene-top{left:15px;right:15px}.scene-status{font-size:7px}.scene-bottom{left:13px;right:12px}.scene-bottom>span{max-width:190px}.network-legend{bottom:55px;left:15px}.scene-panel #packet-caption h3{font-size:20px}#explode-controls{width:78%}dialog{padding:30px 24px}dialog h2{font-size:28px}}
.scene-panel{height:520px}.inspector{height:520px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#607656 transparent}.inspector-hero p{font-size:12px;line-height:1.75}.spec-row{font-size:10px}.did-you-know p{font-size:11px}.device-label{font-size:10px}.timeline-step{font-size:11px}.step-explanation p{font-size:12px}.primary-button{font-size:12px}.lesson strong{font-size:12px}.lesson small{font-size:10px}.toggle-row{font-size:12px}.scene-top>span{font-size:8px}.scene-status{font-size:9px}.scene-bottom>span{font-size:9px}.network-legend{font-size:9px}#packet-caption h3{font-size:17px}#packet-caption p{display:none}
@media(min-width:1500px){.scene-panel,.inspector{height:550px}}
@media(max-width:900px){.scene-panel,.inspector{height:500px}}
@media(max-width:620px){.scene-panel{height:400px}.inspector{height:auto;max-height:none;overflow:visible}.device-label{font-size:8px}.scene-status,.scene-top>span{font-size:7px}.scene-bottom>span,.network-legend{font-size:8px}.timeline-step{font-size:8px}.step-explanation p{font-size:11px}#packet-caption h3{display:none}.primary-button{font-size:11px}}
/* Packet Lab: readable field diagrams complement the rotatable 3D model. */
.packet-mode .scene-panel,.packet-mode .inspector{height:620px}
#packet-tools{position:absolute;top:58px;right:18px;z-index:3;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
#packet-tools button{font-size:10px;font-weight:600;border:1px solid #cdd9bf;background:#f9fbf1;padding:10px 12px;border-radius:8px;box-shadow:0 3px 8px #253d2910}
#packet-tools button[aria-pressed=true]{background:#315641;color:#fff}
#packet-tools>span{font-size:8px;letter-spacing:.2px;color:#7f9273}
.packet-mode #packet-caption{top:61px;left:20px}.packet-mode #packet-caption h3{font-size:14px;margin-top:7px}
.packet-mode .inspector-hero{padding-top:16px}.packet-mode .device-icon{height:36px;width:36px;margin-bottom:12px}.packet-mode .device-icon svg{width:21px;height:21px}
.packet-mode .inspector h3{font-size:24px}.packet-mode .inspector-hero p{font-size:11px;line-height:1.7}
.inspector-field{border-top:1px solid #c2d5ab30;padding-top:17px}
.inspector-field>span{font-size:8px;letter-spacing:1.3px;color:#c4d39b}
.inspector-field h4{font-size:15px;margin:10px 0 7px;color:#f0f1db}
.inspector-field code{display:block;padding:11px 9px;font-size:12px;border:1px solid #aec59926;background:#17332480;color:#eed7a4;border-radius:7px;overflow-wrap:anywhere;line-height:1.6}
.inspector-field p{font-size:11px;line-height:1.85;color:#c4d2b9;margin-top:12px}
.packet-detail-heading{border-top:1px solid var(--line);margin-top:24px;padding-top:23px;display:flex;align-items:center;justify-content:space-between;gap:15px}
.packet-detail-heading h3{font-size:19px;margin-top:7px}
.packet-location{font-size:9px;border:1px solid #dce4d0;border-radius:20px;padding:8px 12px;color:#7e8c6c;white-space:nowrap}
.packet-field-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin-top:21px}
.field-cell{position:relative;text-align:left;background:#f1f4e9;border:1px solid #dce4cf;border-radius:9px;padding:13px 15px;min-width:0}
.field-cell>span{font-size:7px;letter-spacing:1.5px;color:#869974;display:block}
.field-cell strong{display:block;font-size:11px;font-weight:550;margin:7px 0}
.field-cell code{font-family:Consolas,monospace;display:block;font-size:14px;font-weight:600;color:#315641;overflow-wrap:anywhere}
.field-cell.active{outline:2px solid #779a50;outline-offset:1px;background:#e7efd8}
.field-cell.payload{grid-column:1/-1;background:#294637;color:#e8eedc;padding-right:210px}
.field-cell.payload>span{color:#9fbb8e}.field-cell.payload code{color:#e3d7ad}.field-cell.payload.active{background:#365844}
.cipher-preview{position:absolute;right:17px;top:21px;font-family:Consolas,monospace;font-size:11px;letter-spacing:1px;line-height:1.9;color:#a2ba8c}
.nested-preview{top:10px;font-size:9px;line-height:1.4;letter-spacing:0;display:flex;flex-direction:column;gap:3px}.nested-preview span{display:block;padding:4px 10px;background:#64826a;color:#eef0d8;border-radius:3px}.nested-preview span:last-child{background:#b7ba8b;color:#263e30}
.field-cell.trailer{grid-column:1/-1;background:#fbeddc;border-color:#ebcba4}.field-cell.trailer code{color:#a26531}.field-cell.trailer.active{outline-color:#c99150}
.field-explanation{display:flex;gap:13px;margin-top:19px;padding:17px 19px;border:1px solid #e2e7d8;background:#f7f8f1;border-radius:9px}
.field-explanation-icon{font-size:26px;color:#9cb37d;line-height:1}
.field-explanation strong{font-size:12px}.field-explanation p{font-size:12px;color:#718263;line-height:1.85;margin-top:6px}
.encapsulation-strip{display:flex;gap:20px;align-items:center;border-top:1px solid var(--line);margin-top:21px;padding-top:17px}
.encapsulation-strip>span{font-size:8px;color:#94a27e;letter-spacing:1.2px}.encapsulation-strip p{font-family:Consolas,monospace;font-size:11px!important;line-height:1.8;color:#547449!important;margin:0!important}
.packet-diagram-note{font-size:9px!important;line-height:1.8!important;color:#919b84!important;margin-top:15px!important}
@media(max-width:1150px){.packet-mode #packet-caption h3{display:none}.packet-mode #packet-caption .eyebrow{font-size:6px}.packet-mode .inspector h3{font-size:20px}}
@media(max-width:620px){.packet-mode .scene-panel{height:520px}.packet-mode .inspector{height:auto}.packet-mode #packet-caption{top:63px;max-width:130px;line-height:1.8}.packet-mode #packet-caption .eyebrow{font-size:7px}#packet-tools{top:55px;right:13px}#packet-tools button{font-size:9px;padding:8px 9px}.packet-detail-heading{flex-direction:column;align-items:flex-start;gap:12px}.packet-detail-heading h3{font-size:18px}.packet-field-map{grid-template-columns:1fr 1fr;gap:8px}.field-cell{padding:12px 10px}.field-cell code{font-size:12px}.field-cell.payload{padding-right:12px}.cipher-preview{position:static;margin-top:10px;font-size:10px}.encapsulation-strip{flex-direction:column;align-items:flex-start;gap:7px}.field-explanation{padding:13px}.field-explanation p{font-size:11px}}
.journey-context-banner{margin:0 0 20px;padding:17px 21px;border:1px solid #d8e2cb;background:#eaf0e1;border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.journey-context-banner .eyebrow{display:block;font-size:8px;color:#849371}
.journey-context-banner strong{display:block;font-family:Manrope,sans-serif;font-size:17px;margin-top:7px}
.journey-context-banner p{font-size:10px;line-height:1.8;color:#7c8b6d;margin-top:7px;max-width:680px}
.live-journey-hud{position:absolute;top:53px;left:20px;right:20px;pointer-events:none;display:flex;flex-direction:column;gap:6px;z-index:2}
.live-journey-hud>span:first-child{font-size:8px;font-weight:700;color:#c5783c;letter-spacing:1px;text-transform:uppercase}
.live-journey-hud strong{font-family:Manrope,sans-serif;font-size:15px;letter-spacing:-.3px}.live-journey-hud>span:last-child{font-size:7px;color:#8a967d;letter-spacing:1px}
.packet-bubble{position:absolute;z-index:4;transform:translate(-50%,-100%);background:#fff5df;color:#976032;border:1px solid #dca767;padding:7px 10px;border-radius:7px;font-size:9px;box-shadow:0 4px 14px #92613020;white-space:nowrap}
.packet-bubble:after{content:'';position:absolute;left:50%;bottom:-5px;width:8px;height:8px;background:#fff5df;border-right:1px solid #dca767;border-bottom:1px solid #dca767;transform:rotate(45deg)}
.device-label.in-transit{box-shadow:0 0 0 3px #d9a76a60;border-color:#cd9b60}
.device-journey-action{padding:12px;border-radius:8px;background:#c3d89910;border:1px solid #c3d89925;margin-bottom:12px}.device-journey-action>span{font-size:8px;letter-spacing:1.3px;color:#ddcc9e}.device-journey-action p{font-size:11px;color:#c5d4b6;line-height:1.85;margin-top:7px}
.journey-controls-extra{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:8px 0 10px;border-top:1px solid #e8ebdf;padding-top:13px}.journey-controls-extra label{font-size:10px;color:#7b8a6d;display:flex;align-items:center;gap:6px}.journey-controls-extra input{accent-color:#54784b}
.inspect-stage{display:flex;align-items:center;gap:7px;font-size:11px;padding:9px 12px;background:#ebf0e2;border:1px solid #d7e2c9;border-radius:7px;white-space:nowrap}.inspect-stage svg{width:14px;height:14px}
.journey-scrubber{display:flex;align-items:center;gap:17px}.journey-scrubber button{font-size:10px;white-space:nowrap;color:#778b65}.journey-scrubber input{margin:13px 0;width:auto;flex:1;min-width:50px}.journey-scrubber output{font-size:9px;color:#7f916d;min-width:115px;text-align:right}
.route-strip{display:flex;align-items:center;gap:6px;overflow-x:auto;margin:13px 0;padding:5px 1px 12px;scrollbar-width:thin;scrollbar-color:#d6dfc9 transparent}
.route-node{white-space:nowrap;background:#f2f4eb;border:1px solid #e1e6d7;border-radius:5px;padding:6px 8px;color:#91a17d;font-size:8px}.route-node.here{background:#e7efd9;color:#405b31;border-color:#b0c397}.route-node.passed{color:#688357}.route-strip>span{font-size:10px;color:#b4c1a3}
@media(max-width:620px){.journey-context-banner{padding:15px;align-items:flex-start;flex-direction:column;gap:10px}.journey-context-banner strong{font-size:15px}.live-journey-hud{left:15px;right:15px}.live-journey-hud strong{font-size:12px}.packet-bubble{font-size:8px;padding:6px 8px}.journey-controls-extra{flex-wrap:wrap}.journey-controls-extra label{font-size:9px}.inspect-stage{font-size:10px}.journey-scrubber{flex-wrap:wrap;gap:10px}.journey-scrubber output{min-width:90px;font-size:8px}.journey-scrubber button{font-size:9px}.journey-context-banner p{font-size:10px}}
.topbar{position:sticky;top:0;z-index:20}.workspace-heading{scroll-margin-top:106px}
.scene-journey-dock{background:#fcfdf5;border-top:1px solid #dbe3d0;padding:14px 18px;z-index:3;flex-shrink:0}
.scene-journey-dock .primary-button{font-size:10px;padding:9px 11px;box-shadow:none;min-width:87px}
.scene-journey-dock>span{font-size:9px;color:#7e906b;flex:1}
.scene-journey-dock>button:not(.primary-button){font-size:10px;padding:7px 3px;white-space:nowrap;color:#64834e}
.network-legend{bottom:116px}
@media(max-width:620px){.workspace-heading{scroll-margin-top:138px}.scene-journey-dock{left:12px;right:12px;gap:7px;padding:8px}.scene-journey-dock>span{font-size:8px}.scene-journey-dock .primary-button{min-width:70px;padding:8px;font-size:9px}.scene-journey-dock>button:not(.primary-button){font-size:9px}.network-legend{bottom:113px}}
.scene-panel{display:flex;flex-direction:column;height:clamp(560px,calc(100dvh - 116px),760px);scroll-margin-top:100px}
.scene-viewport{position:relative;flex:1;min-height:0;overflow:hidden}
.lab-grid>.inspector{height:clamp(560px,calc(100dvh - 116px),760px)}
.dock-heading{display:flex;justify-content:space-between;gap:10px;align-items:center}
.dock-heading>span{font-size:8px;letter-spacing:1px;color:#7a8871}.dock-heading strong{font-size:11px;color:#315641}
.dock-timeline{display:flex;gap:5px;margin:10px 0}
.dock-timeline button{flex:1;padding:6px 3px;border:1px solid #e0e6d7;border-radius:5px;font-size:9px;background:#f0f3e9;color:#67745e}
.dock-timeline button.active{background:#315641;color:white;border-color:#315641}.dock-timeline button.done{background:#e0ead6}
#dock-description{font-size:12px;line-height:1.55;color:#4b6044;min-height:3.1em;margin-bottom:10px}
.dock-actions{display:flex;align-items:center;gap:10px}.dock-actions>button:not(.primary-button){font-size:10px;padding:6px 0;white-space:nowrap}
.dock-actions label{margin-left:auto;font-size:9px;color:#647357;display:flex;align-items:center;gap:4px}.dock-actions select{min-width:0;max-width:125px;font-size:10px;padding:5px;border:1px solid #dce4d3;border-radius:5px;background:#f4f6ee;color:#315641}
.dock-progress{display:flex;gap:10px;align-items:center;margin-top:8px}.dock-progress input{flex:1;min-width:0;accent-color:#315641;height:12px}.dock-progress output{font-size:9px;color:#667759;min-width:32px;text-align:right}
.scene-viewport .network-legend{bottom:58px}
@media(max-width:620px){.scene-panel{height:clamp(560px,calc(100dvh - 150px),720px);scroll-margin-top:130px}.lab-grid>.inspector{height:auto}.dock-heading{align-items:flex-start;flex-direction:column;gap:4px}.scene-journey-dock{padding:12px}.dock-timeline{gap:3px}.dock-timeline button{font-size:8px;padding:5px 2px}#dock-description{font-size:11px;min-height:4.65em}.dock-actions{gap:8px;flex-wrap:wrap}.dock-actions label{margin-left:0}.dock-actions select{max-width:110px}.dock-actions>button:not(.primary-button){font-size:9px}}
.browser-preview{position:absolute;right:16px;top:70px;width:min(285px,47%);z-index:4;background:#fffef8;border:1px solid #cbd9c2;border-radius:12px;box-shadow:0 14px 32px #253d3226;overflow:hidden;pointer-events:none}
.browser-chrome{display:flex;align-items:center;gap:8px;padding:8px 10px;background:#edf2e6;color:#607453;font-size:7px;letter-spacing:.7px}.browser-dots{color:#bf9f75;font-size:8px}.browser-chrome>span:last-child{margin-left:auto;color:#315641}
.browser-address{display:flex;align-items:center;gap:4px;margin:8px 9px;padding:7px 6px;border:1px solid #dbe3d3;border-radius:5px;background:white;min-height:30px;font-size:10px}.browser-address code{font-size:10px;white-space:nowrap}.browser-address kbd{margin-left:auto;font-size:8px;border:1px solid #d6dece;border-bottom-width:3px;border-radius:4px;padding:3px;color:#7c8871}.browser-address kbd.pressed{background:#315641;color:white;border-color:#315641;border-bottom-width:1px;transform:translateY(2px)}
.browser-preview[data-phase=lookup] #browser-url{background:#e8edce;color:#355126}
.browser-load-track{height:3px;background:#e8eddf}.browser-load-track>span{display:block;height:100%;background:#d98048}
.browser-content{padding:10px 12px;height:138px}.browser-symbol{display:flex;align-items:center;justify-content:center;background:#e9efdf;border-radius:12px;width:35px;height:35px;font-size:23px;color:#628154;margin-bottom:9px}
#browser-start>strong,#browser-wait>strong{display:block;font-family:Manrope,sans-serif;font-size:17px;letter-spacing:-.5px}#browser-start>small,#browser-wait>small{display:block;font-size:10px;color:#86917d;margin-top:5px}
#browser-caption{padding:9px 12px;background:#f1f4e9;border-top:1px solid #e1e7d8;font-size:10px;line-height:1.5;min-height:49px;color:#506645}
.demo-site-nav{display:flex;justify-content:space-between;align-items:center}.demo-site-nav>b{font-size:18px;letter-spacing:-1px}.demo-site-nav>b>span{color:#d98048}.demo-site-nav>span{font-size:6px;letter-spacing:.8px}.demo-site-label{font-size:6px;letter-spacing:1px;color:#8a9878;display:block;margin:9px 0 4px}#browser-page-hero>strong{font-family:Manrope,sans-serif;font-size:23px;letter-spacing:-1px}#browser-page-hero>p{font-size:9px;margin-top:3px;color:#7c8a70}#browser-page-cards{display:flex;gap:5px;margin-top:9px}#browser-page-cards>span{flex:1;background:#eaf0de;border-radius:4px;padding:5px;font-size:7px;color:#637c4c}#browser-page-cards b{font-weight:600}
.browser-preview[data-phase=waiting] .browser-content{height:90px}.browser-preview[data-phase=waiting] .browser-symbol{display:none}
@media(max-width:620px){.browser-preview{top:108px;right:10px;width:58%;max-width:260px}.browser-chrome{font-size:6px;padding:6px}.browser-content{height:108px;padding:7px 9px}.browser-symbol{display:none}.browser-address{margin:6px;padding:4px}.browser-address code{font-size:8px}.browser-address kbd{font-size:7px}#browser-caption{font-size:9px;padding:7px 9px;min-height:40px}#browser-start>strong,#browser-wait>strong{font-size:14px}#browser-page-hero>strong{font-size:18px}.demo-site-label{margin-top:4px}.browser-preview[data-phase=waiting] .browser-content{height:60px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.loader{animation:none}}