/* BREAK THE INTERNET — design tokens */
:root{
  --bg:#101114; --surface:#181A20; --panel:#1D2027; --border:#30333B;
  --text:#F2F1EC; --muted:#9AA0AB; --faint:#6B707C;
  --lime:#C8F169; --lime-dim:#9DBF4A; --cyan:#5ED3E8; --amber:#F5B942; --red:#FF5A5A;
  --radius:14px; --radius-sm:9px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.5}
button{font:inherit;cursor:pointer}
button:focus-visible, [tabindex]:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--lime);color:#101114;padding:8px 12px;border-radius:8px;z-index:50}
.skip-link:focus{left:8px}

/* Topbar */
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 28px;background:rgba(16,17,20,.94);border-bottom:1px solid var(--border);backdrop-filter:blur(6px)}
.brand{display:flex;align-items:center;gap:12px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{letter-spacing:.08em;font-size:15px}
.brand-text small{letter-spacing:.22em;font-size:10px;color:var(--muted)}
.top-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sys-status{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding:7px 12px;border:1px solid var(--border);border-radius:999px;background:var(--surface)}
.dot{width:9px;height:9px;border-radius:50%;background:var(--lime);flex:none}
.dot.ok{background:var(--lime);box-shadow:0 0 0 3px rgba(200,241,105,.18)}
.dot.warn{background:var(--amber)}
.dot.bad{background:var(--red)}
.pulse-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--lime);margin-right:6px;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* Buttons */
.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);padding:9px 16px;border-radius:9px;font-weight:600;font-size:14px;transition:transform .12s ease, background .15s ease, border-color .15s ease}
.btn:hover{transform:translateY(-1px);border-color:#4A4E58}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--lime);color:#101114;border-color:var(--lime)}
.btn-primary:hover{background:#d8fa82}
.btn-secondary{background:transparent}
.btn-ghost{background:transparent}
.btn-sm{padding:6px 11px;font-size:13px}
.btn-danger-outline{border-color:#5A3333;color:#FF8A8A}
.btn-warning-outline{border-color:#5A4A22;color:#FFD47E}
.btn-primary-outline{border-color:#3E4A22;color:var(--lime)}
.text-btn{background:none;border:none;color:var(--lime);padding:0;text-decoration:underline;text-underline-offset:3px;font-weight:600}
.text-btn:hover{color:#e2fb9e}

/* Hero */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;padding:52px 28px 34px;max-width:1280px;margin:0 auto}
.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--muted);font-weight:700;margin:0 0 14px}
.hero h1{font-size:clamp(38px,5.2vw,64px);line-height:1.02;letter-spacing:-.02em;margin:0 0 16px}
.hero-sub{font-size:18px;color:var(--muted);max-width:520px;margin:0 0 22px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{color:var(--muted);font-size:14px;margin-top:18px}
.hero-preview{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;animation:rise .5s ease both}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.preview-head{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.14em;color:var(--muted);font-weight:700}
.live{color:var(--text)}
.preview-svg{width:100%;height:auto;display:block;margin-top:8px}
.pv-node rect{fill:var(--panel);stroke:var(--border)}
.pv-node text{fill:var(--text);font-size:12px;font-weight:700;font-family:var(--font)}
.pv-node .pv-sub{fill:var(--muted);font-size:9px;letter-spacing:.12em}
.preview-caption{color:var(--muted);font-size:13px;margin:8px 0 0}

/* Workspace */
.workspace{max-width:1280px;margin:0 auto;padding:18px 28px 40px}
.workspace-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;flex-wrap:wrap;margin-bottom:14px}
.workspace-head h2{margin:0;font-size:26px;letter-spacing:-.01em}
.workspace-head p{margin:4px 0 0;color:var(--muted);font-size:14px}
.sim-state{display:flex;gap:16px;align-items:center;font-size:13px;color:var(--muted)}
.run-indicator{font-weight:800;letter-spacing:.08em;font-size:12px}
.run-indicator.running{color:var(--lime)}
.run-indicator.paused{color:var(--amber)}
.sim-clock strong{color:var(--text);font-family:var(--mono)}

/* Scenarios */
.scenarios{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.chip{border:1px solid var(--border);background:var(--surface);color:var(--muted);padding:8px 13px;border-radius:999px;font-size:13px;font-weight:600}
.chip:hover{color:var(--text)}
.chip.active{background:var(--lime);color:#101114;border-color:var(--lime)}

/* Metrics */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}
.metric{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:13px 15px;display:flex;flex-direction:column;min-width:0}
.m-label{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700}
.m-label small{letter-spacing:0;text-transform:none;font-weight:400}
.m-value{font-size:30px;line-height:1.15;font-family:var(--mono);font-weight:700;transition:color .2s}
.m-hint{font-size:12px;color:var(--faint)}
.ok-text{color:var(--lime)} .bad-text{color:#FF8A8A} .warn-text{color:var(--amber)}
.metric-wide{grid-column:span 2}
#spark{width:100%;height:44px;display:block}
#sparkLine{transition:all .3s}

/* Main grid */
.grid-main{display:grid;grid-template-columns:2fr 1fr;gap:14px;align-items:start}
.grid-bottom{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px;align-items:start}
.diagram-panel,.controls,.timeline-panel,.edu-panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.panel-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:12px}
.panel-head h3{margin:0;font-size:18px}
.panel-head p{margin:3px 0 0;color:var(--muted);font-size:13px}
.legend{font-size:12px;color:var(--muted);white-space:nowrap}
.leg{display:inline-block;width:10px;height:3px;border-radius:2px;margin:0 2px 0 10px;vertical-align:middle}
.leg.req{background:var(--cyan)} .leg.res{background:var(--lime)} .leg.fail{background:var(--red)}

.diagram-scroll{overflow-x:auto}
#diagram{width:100%;min-width:760px;height:auto;display:block}
.link{fill:none;stroke:#3A3E47;stroke-width:2}
.link.backup-link{stroke-dasharray:6 5;stroke:#3A3E47}
.link.backup-link.active{stroke:var(--cyan);stroke-width:2.5}
.node{cursor:pointer}
.node rect{fill:var(--surface);stroke:var(--border);stroke-width:1.5;transition:stroke .2s, fill .2s}
.node:hover rect,.node.selected rect{stroke:var(--lime);fill:#20232B}
.node.failed rect{stroke:var(--red)}
.node.warning rect{stroke:var(--amber)}
.node.standby rect{stroke-dasharray:5 4}
.node-name{fill:var(--text);font-size:14px;font-weight:700;font-family:var(--font)}
.node-id{fill:var(--muted);font-size:10px;letter-spacing:.1em;font-family:var(--mono)}
.node-status{fill:var(--lime);font-size:11px;font-weight:800;letter-spacing:.06em;font-family:var(--font)}
.node.failed .node-status{fill:var(--red)}
.node.warning .node-status{fill:var(--amber)}
.node.standby .node-status{fill:var(--muted)}
.queue-badge rect{fill:var(--amber);stroke:none}
.queue-badge text{fill:#101114;font-size:11px;font-weight:800;font-family:var(--mono)}
.diagram-foot{color:var(--faint);font-size:12px;margin:8px 0 0}
.queue-meter{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.queue-meter span:first-child{font-weight:800;letter-spacing:.1em}
.meter{flex:1;min-width:140px;height:10px;background:var(--surface);border:1px solid var(--border);border-radius:999px;overflow:hidden}
.meter div{height:100%;background:var(--lime);transition:width .35s ease}
.meter div.warn{background:var(--amber)} .meter div.full{background:var(--red)}
.queue-warn{color:var(--amber);font-weight:600}

/* Controls */
.controls{position:sticky;top:74px}
.control{border:1px solid var(--border);border-radius:12px;padding:13px 14px;margin-bottom:10px;background:var(--surface)}
.control-head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.control h4{margin:0;font-size:15px}
.control p{margin:6px 0 10px;color:var(--muted);font-size:13px}
.control .btn{width:100%}
.state-pill{font-size:11px;font-weight:800;letter-spacing:.08em;padding:4px 9px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.state-pill.on{color:#101114;background:var(--lime);border-color:var(--lime)}
.state-pill.bad{color:#fff;background:var(--red);border-color:var(--red)}
.state-pill.warn{color:#101114;background:var(--amber);border-color:var(--amber)}
.control-actions{display:flex;gap:8px}
.control-actions .btn{flex:1}
.controls-note{color:var(--faint);font-size:12px;margin:10px 0 0}

/* Timeline + education */
.log{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;max-height:420px;overflow-y:auto}
.log li{display:grid;grid-template-columns:64px 76px 1fr;gap:10px;font-size:13px;padding:9px 10px;background:var(--surface);border:1px solid var(--border);border-radius:9px}
.log time{font-family:var(--mono);color:var(--muted);font-size:12px}
.sev{font-weight:800;font-size:11px;letter-spacing:.06em}
.sev.INFO{color:var(--muted)} .sev.SUCCESS{color:var(--lime)} .sev.WARNING{color:var(--amber)} .sev.ERROR{color:#FF8A8A}
.empty-log{color:var(--muted);font-size:14px;border:1px dashed var(--border);border-radius:9px;padding:14px;text-align:center}
.edu-panel h4{margin:0 0 8px;font-size:17px}
.edu-panel p{font-size:14px;color:#D8D8D2;margin:0 0 8px}
.edu-panel p strong{color:var(--text)}
.glossary{margin:14px 0 0;padding-top:12px;border-top:1px solid var(--border);display:grid;grid-template-columns:1fr 1fr;gap:10px}
.glossary div{font-size:13px}
.glossary dt{font-weight:800;color:var(--lime);cursor:help}
.glossary dd{margin:2px 0 0;color:var(--muted)}

.footer{border-top:1px solid var(--border);padding:22px 28px;color:var(--muted);font-size:13px;text-align:center}
.footer code{color:var(--text);font-family:var(--mono)}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:var(--text);color:#101114;padding:11px 18px;border-radius:999px;font-weight:700;font-size:14px;box-shadow:0 10px 30px rgba(0,0,0,.45);z-index:40;max-width:calc(100vw - 32px);text-align:center}

/* Responsive */
@media (max-width:1000px){
  .hero{grid-template-columns:1fr;padding-top:34px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric-wide{grid-column:span 2}
  .grid-main{grid-template-columns:1fr}
  .controls{position:static}
  .grid-bottom{grid-template-columns:1fr}
}
@media (max-width:640px){
  .topbar{padding:12px 16px;flex-wrap:wrap}
  .brand-text small{display:none}
  .sys-status{font-size:12px}
  .hero,.workspace{padding-left:16px;padding-right:16px}
  .metrics{grid-template-columns:1fr 1fr}
  .metric-wide{grid-column:span 2}
  .m-value{font-size:24px}
  .log li{grid-template-columns:52px 1fr}
  .log li .sev{grid-column:2}
  .btn{min-height:44px}
  .chip{min-height:40px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* ===== v2: dynamic frontend, Attack Lab, traffic, demo, uptime ===== */
body{
  background-image:
    radial-gradient(900px 420px at 15% -10%, rgba(200,241,105,.07), transparent 60%),
    radial-gradient(900px 420px at 90% 0%, rgba(94,211,232,.06), transparent 60%),
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:auto, auto, 44px 44px, 44px 44px;
}
body.attack-mode .diagram-panel{border-color:#5A3333}
body.attack-mode .ticker{border-color:#5A3333}
.hl{color:var(--lime);text-decoration:underline;text-decoration-color:rgba(200,241,105,.45);text-underline-offset:6px}
.ticker{display:flex;gap:12px;align-items:center;max-width:1280px;margin:0 auto;padding:9px 28px;border-bottom:1px solid var(--border);font-size:13px;color:var(--muted);background:var(--surface)}
.ticker-label{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--lime);flex:none}
#tickerText{color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#tickerText.flash{animation:tickflash .45s ease}
@keyframes tickflash{from{color:var(--lime)}to{color:var(--text)}}
.traffic-panel{display:grid;grid-template-columns:1.2fr 1fr 1fr 1.2fr;gap:16px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;margin-bottom:14px;align-items:end}
.traffic-field label{display:block;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--muted);margin-bottom:6px}
.traffic-field label span{color:var(--text);font-family:var(--mono)}
.traffic-field input[type="range"]{width:100%;accent-color:var(--lime)}
.traffic-field select{width:100%;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:9px;padding:9px 10px;font:inherit}
.traffic-export{display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.traffic-note{font-size:12px;color:var(--faint)}
.demo-banner{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#23291A;border:1px solid #3E4A22;border-radius:10px;padding:9px 13px;margin-bottom:12px;font-size:14px;font-weight:600}
.demo-banner .btn{width:auto}
.attack-lab{border-top:1px solid var(--border);margin-top:16px;padding-top:14px}
.attack-lab .panel-head{margin-bottom:8px}
.attack-stats{font-size:13px;font-family:var(--mono);color:var(--text);background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:9px 12px;margin:0 0 10px}
.control.attack{border-color:#4A3333}
.control.attack .mitigation{margin-top:8px}
.mitigation.on{border-color:#3E4A22;color:var(--lime)}
.link.attack-link{stroke:#5A3333;stroke-dasharray:6 5}
.link.spoof-link{stroke:#5A4A22;stroke-dasharray:6 5}
.link.spoof-link.active{stroke:var(--amber);stroke-width:2.5}
.link.attack-link.active{stroke:var(--red);stroke-width:2.5}
.node.active rect{stroke:var(--lime);stroke-width:3}
.node.attacking rect{stroke:var(--red)}
.inspector{margin-top:14px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:11px 13px;font-size:13px;display:flex;gap:10px;flex-wrap:wrap}
.inspector-label{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--lime);flex:none}
#inspectorText{font-family:var(--mono);color:var(--text)}
.uptime-panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:14px}
.uptime-panel h3{margin:0 0 12px;font-size:18px}
.uptime-panel h3 span{font-size:13px;font-weight:400;color:var(--muted);margin-left:8px}
.uptime-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 24px}
.uptime-row{display:grid;grid-template-columns:74px 1fr 52px;gap:10px;align-items:center;font-size:13px}
.uptime-row span{color:var(--muted)}
.uptime-row strong{text-align:right;font-family:var(--mono)}
.uptime-bar{height:8px;background:var(--surface);border:1px solid var(--border);border-radius:999px;overflow:hidden}
.uptime-bar div{height:100%;background:var(--lime);transition:width .4s ease}
.uptime-note{color:var(--faint);font-size:12px;margin:12px 0 0}
.m-value.bump{animation:bump .35s ease}
@keyframes bump{0%{transform:scale(1)}40%{transform:scale(1.12)}100%{transform:scale(1)}}
.btn-primary{box-shadow:0 0 0 0 rgba(200,241,105,.35);transition:transform .12s ease, box-shadow .25s ease, background .15s ease}
.btn-primary:hover{box-shadow:0 4px 22px rgba(200,241,105,.22)}
@media (max-width:1000px){
  .traffic-panel{grid-template-columns:1fr 1fr}
  .uptime-grid{grid-template-columns:1fr 1fr}
  .ticker{padding:9px 16px}
}
@media (max-width:640px){
  .traffic-panel{grid-template-columns:1fr}
  .uptime-grid{grid-template-columns:1fr}
}