:root{
  --bg:#070c15; --bg2:#0a111d; --panel:#0d1626; --panel2:#111d31; --panel3:#16233a;
  --border:#1c2a42; --line:#273852; --line2:#334867;
  --text:#e8eef8; --muted:#93a4bc; --dim:#64748b; --faint:#44546b;
  --accent:#2dd4bf; --accent-strong:#14b8a6; --accent2:#38bdf8; --amber:#fbbf24; --red:#f87171; --green:#34d399; --violet:#a78bfa;
  --radius:12px; --radius-sm:8px; --radius-lg:18px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --shadow:0 18px 60px rgba(0,0,0,.45);
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--accent);text-decoration:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
.hidden{display:none!important}
.muted{color:var(--muted)}
.small{font-size:12px}
.xs{font-size:11px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#26364f;border-radius:10px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#334867}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:9px 14px;border-radius:9px;font-weight:600;font-size:13px;line-height:1;transition:background .15s,border-color .15s,transform .1s;white-space:nowrap}
.btn:hover{background:var(--panel3);border-color:var(--line2)}
.btn:active{transform:translateY(1px)}
.btn svg{width:16px;height:16px}
.btn-primary{background:linear-gradient(180deg,#2dd4bf,#14b8a6);border-color:#2dd4bf;color:#04231f}
.btn-primary:hover{background:linear-gradient(180deg,#5eead4,#2dd4bf);border-color:#5eead4}
.btn-accent{background:rgba(45,212,191,.12);border-color:rgba(45,212,191,.45);color:#7ff3e5}
.btn-accent:hover{background:rgba(45,212,191,.2)}
.btn-outline{background:rgba(255,255,255,.02);border-color:var(--line2)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,.05)}
.btn-sm{padding:7px 11px;font-size:12.5px;border-radius:8px}
.btn-xs{padding:4px 8px;font-size:11px;border-radius:6px}
.btn-lg{padding:13px 20px;font-size:14.5px;border-radius:11px}
.btn-block{width:100%}
.btn-danger{background:rgba(248,113,113,.1);border-color:rgba(248,113,113,.4);color:#fca5a5}
.btn:disabled{opacity:.45;cursor:not-allowed}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:8px;background:transparent;border:1px solid transparent;color:var(--muted)}
.icon-btn:hover{background:rgba(255,255,255,.055);color:var(--text)}
.icon-btn svg{width:17px;height:17px}
.icon-btn.sm{width:26px;height:26px}
.icon-btn.sm svg{width:14px;height:14px}
.icon-btn.accent{color:var(--accent);background:rgba(45,212,191,.08)}
.icon-tile{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:linear-gradient(180deg,rgba(45,212,191,.14),rgba(56,189,248,.06));border:1px solid rgba(45,212,191,.2);color:var(--accent);flex:none}
.icon-tile svg{width:20px;height:20px}
.icon-tile.large{width:56px;height:56px;border-radius:14px}
.icon-tile.large svg{width:26px;height:26px}
.avatar{width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2dd4bf,#38bdf8);color:#04231f;font-weight:800;font-size:12px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;text-transform:uppercase;letter-spacing:.14em;color:var(--accent);font-weight:700}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 rgba(45,212,191,.5);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(45,212,191,.45)}70%{box-shadow:0 0 0 8px rgba(45,212,191,0)}100%{box-shadow:0 0 0 0 rgba(45,212,191,0)}}
.grad{background:linear-gradient(100deg,#5eead4,#38bdf8 60%,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- branding ---------- */
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em}
.brand-mark{width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#13283f,#0b1524);border:1px solid rgba(45,212,191,.3);color:var(--accent);box-shadow:inset 0 0 18px rgba(45,212,191,.08)}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:17px}
.brand-text span{color:var(--accent)}
.brand.small .brand-mark{width:28px;height:28px;border-radius:8px}
.brand.small .brand-mark svg{width:17px;height:17px}
.brand.small{font-size:14.5px}
.brand.clickable{cursor:pointer}

/* ---------- landing ---------- */
.landing{position:relative;min-height:100vh;overflow:hidden;background:radial-gradient(1200px 700px at 80% -10%,rgba(45,212,191,.1),transparent 60%),radial-gradient(900px 600px at -10% 20%,rgba(56,189,248,.08),transparent 60%),var(--bg)}
.landing-bg{position:absolute;inset:0;pointer-events:none;opacity:.42;mask-image:linear-gradient(180deg,#000 0,#000 55%,transparent 88%)}
.landing-bg svg{width:100%;height:100%}
.landing-nav{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;max-width:1240px;margin:0 auto;padding:22px 28px}
.landing-nav-links{display:flex;align-items:center;gap:26px;font-size:13px;color:var(--muted)}
.landing-nav-links a{color:var(--muted)}
.landing-nav-links a:hover{color:var(--text)}
.hero{position:relative;z-index:2;display:grid;grid-template-columns:1.18fr .82fr;gap:56px;align-items:center;max-width:1240px;margin:0 auto;padding:50px 28px 70px}
.hero-copy h1{font-size:clamp(38px,5vw,64px);line-height:1.02;letter-spacing:-.035em;margin:18px 0 22px;font-weight:800}
.lead{font-size:16.5px;color:var(--muted);max-width:600px;line-height:1.65}
.hero-actions{display:flex;gap:12px;margin:30px 0 34px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;border-top:1px solid var(--border);padding-top:22px;max-width:540px}
.hero-stats div{display:flex;flex-direction:column;gap:2px}
.hero-stats strong{font-size:22px;letter-spacing:-.02em}
.hero-stats span{font-size:11.5px;color:var(--dim);text-transform:uppercase;letter-spacing:.09em;font-weight:600}
.auth-card{position:relative;background:linear-gradient(180deg,rgba(17,29,49,.92),rgba(10,17,29,.92));border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);backdrop-filter:blur(12px)}
.auth-card::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:linear-gradient(120deg,rgba(45,212,191,.35),transparent 40%,rgba(56,189,248,.25));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.auth-tabs{display:flex;background:rgba(0,0,0,.25);border:1px solid var(--border);border-radius:10px;padding:4px;margin-bottom:22px}
.auth-tab{flex:1;background:transparent;border:0;padding:8px;border-radius:7px;color:var(--muted);font-size:13px;font-weight:600}
.auth-tab.active{background:var(--panel3);color:var(--text);box-shadow:0 2px 8px rgba(0,0,0,.25)}
.auth-form h2{font-size:21px;letter-spacing:-.02em}
.auth-form .muted{margin:4px 0 20px;font-size:13px}
.auth-form label{display:flex;flex-direction:column;gap:6px;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:13px}
.auth-form input{background:#0a1220;border:1px solid var(--line);border-radius:9px;padding:11px 12px;font-size:13.5px;color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s}
.auth-form input:focus{border-color:rgba(45,212,191,.6);box-shadow:0 0 0 3px rgba(45,212,191,.1)}
.auth-form input::placeholder{color:#4d5d74}
.auth-error{min-height:18px;color:#fca5a5;font-size:12px;margin:2px 0 10px}
.demo-hint{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:18px;padding:11px 12px;border:1px dashed var(--line2);border-radius:10px;background:rgba(56,189,248,.04)}
.demo-hint>div{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.hint-label{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--dim);font-weight:700;width:100%}
.demo-hint code{font-family:var(--mono);font-size:10.5px;background:#0a1220;border:1px solid var(--border);padding:2px 6px;border-radius:5px;color:#a5f3fc}
.fine{font-size:10.5px;color:var(--dim);margin-top:14px;line-height:1.5}
.features{position:relative;z-index:1;max-width:1240px;margin:0 auto;padding:70px 28px 30px;border-top:1px solid var(--border)}
.section-head{max-width:650px;margin-bottom:34px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);letter-spacing:-.03em;margin-top:12px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature{background:linear-gradient(180deg,rgba(17,29,49,.55),rgba(10,17,29,.35));border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.feature h3{font-size:15px;margin:14px 0 7px;letter-spacing:-.01em}
.feature p{font-size:12.5px;color:var(--muted);line-height:1.6}
.vendors{max-width:1240px;margin:20px auto 0;padding:40px 28px;text-align:center;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.vendor-row{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:20px}
.vendor-chip{border:1px solid var(--border);background:var(--panel);border-radius:100px;padding:8px 16px;font-weight:700;font-size:12.5px;letter-spacing:.01em;display:inline-flex;align-items:center;gap:8px}
.vendor-chip::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
.vendor-chip.cisco{color:#6cb6ff}.vendor-chip.arista{color:#f08c00}.vendor-chip.juniper{color:#84b135}.vendor-chip.mikrotik{color:#f87171}.vendor-chip.fortinet{color:#ff6b5b}.vendor-chip.ubiquiti{color:#5aa2ff}.vendor-chip.linux{color:#fbbf24}.vendor-chip.windows{color:#38bdf8}
.how{max-width:1240px;margin:0 auto;padding:70px 28px}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step}
.steps li{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.steps li>span{font-family:var(--mono);font-size:11px;color:var(--accent);border:1px solid rgba(45,212,191,.3);background:rgba(45,212,191,.06);padding:3px 7px;border-radius:5px}
.steps h3{font-size:14px;margin:14px 0 6px}
.steps p{font-size:12px;color:var(--muted);line-height:1.55}
.landing-footer{max-width:1240px;margin:0 auto;padding:34px 28px 50px;border-top:1px solid var(--border);display:flex;align-items:center;gap:22px;justify-content:space-between;flex-wrap:wrap}
.landing-footer p{font-size:11px;color:var(--dim);max-width:640px}

/* ---------- app shell ---------- */
.app{height:100vh;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}
.appbar{height:54px;flex:none;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 14px;background:linear-gradient(180deg,#0d1626,#0a111d);border-bottom:1px solid var(--border);position:relative;z-index:20}
.appbar-left,.appbar-right,.appbar-center{display:flex;align-items:center;gap:10px;min-width:0}
.appbar-left{flex:1}
.appbar-right{flex:1;justify-content:flex-end}
.appbar-center{flex:none}
.tool-group{display:flex;align-items:center;gap:2px;padding:2px;border:1px solid var(--border);border-radius:9px;background:rgba(0,0,0,.15)}
.mode-toggle{display:flex;background:rgba(0,0,0,.22);border:1px solid var(--border);border-radius:9px;padding:3px}
.mode-toggle button{border:0;background:transparent;color:var(--muted);font-size:12px;font-weight:700;padding:5px 12px;border-radius:6px}
.mode-toggle button.active{background:var(--panel3);color:var(--text);box-shadow:0 1px 5px rgba(0,0,0,.3)}
.mode-toggle button[data-sim].active,.mode-toggle #mode-simulation.active{color:var(--accent)}
.sim-controls{display:flex;align-items:center;gap:4px;padding:2px 6px;border:1px solid var(--border);border-radius:9px;background:rgba(0,0,0,.15)}
.sim-controls input[type=range]{width:74px;accent-color:var(--accent);height:4px}
.lab-title-wrap{display:flex;align-items:center;gap:10px;min-width:0}
.lab-title-input{background:transparent;border:1px solid transparent;font-size:14px;font-weight:700;padding:5px 8px;border-radius:7px;min-width:130px;max-width:36vw;outline:none;color:var(--text)}
.lab-title-input:hover{border-color:var(--border)}
.lab-title-input:focus{border-color:rgba(45,212,191,.45);background:rgba(0,0,0,.2)}
.save-state{font-size:10.5px;color:var(--dim);border:1px solid var(--border);padding:2px 7px;border-radius:100px;white-space:nowrap}
.save-state.saving{color:var(--amber);border-color:rgba(251,191,36,.3)}
.save-state.unsaved{color:var(--amber);border-color:rgba(251,191,36,.3)}
.save-state.saved{color:var(--green);border-color:rgba(52,211,153,.25)}
.user-menu{position:relative}
.user-chip{display:flex;align-items:center;gap:8px;border:1px solid var(--border);background:rgba(0,0,0,.16);border-radius:100px;padding:3px 10px 3px 4px;font-size:12px;font-weight:600}
.user-chip>svg{width:14px;height:14px;color:var(--dim)}
.user-chip:hover{border-color:var(--line2)}
.user-dropdown{position:absolute;right:0;top:44px;width:240px;background:var(--panel2);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;z-index:60}
.dd-user{padding:10px;border-bottom:1px solid var(--border);margin-bottom:5px;display:flex;flex-direction:column;gap:2px}
.dd-user strong{font-size:13px}
.dd-user span{font-size:11px;color:var(--dim)}
.user-dropdown button{display:flex;align-items:center;gap:9px;width:100%;text-align:left;background:transparent;border:0;padding:9px 10px;border-radius:7px;font-size:12.5px;color:var(--muted)}
.user-dropdown button:hover{background:rgba(255,255,255,.05);color:var(--text)}
.user-dropdown button svg{width:15px;height:15px}

/* ---------- dashboard ---------- */
.dashboard{flex:1;overflow:auto;padding:34px 38px 70px;max-width:1320px;width:100%;margin:0 auto}
.dash-hero{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:6px 0 36px}
.dash-actions{display:flex;gap:8px;align-items:center;flex:none}
.dash-hero h1{font-size:clamp(26px,3.2vw,36px);letter-spacing:-.03em;margin:10px 0 6px}
.dash-hero .muted{font-size:13px}
.section-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px}
.section-row h2{font-size:16px;letter-spacing:-.01em}
.template-section{margin-bottom:38px}
.template-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.template-card{position:relative;background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:left;transition:border-color .15s,transform .15s}
.template-card:hover{border-color:rgba(45,212,191,.45);transform:translateY(-2px)}
.template-card .tpl-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.tpl-badge{font-size:9.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:3px 7px;border-radius:5px;background:rgba(56,189,248,.1);color:#7dd3fc;border:1px solid rgba(56,189,248,.2)}
.tpl-badge.security{background:rgba(248,113,113,.08);color:#fca5a5;border-color:rgba(248,113,113,.25)}
.tpl-badge.multivendor{background:rgba(167,139,250,.1);color:#c4b5fd;border-color:rgba(167,139,250,.25)}
.template-card h3{font-size:13.5px;margin-bottom:5px}
.template-card p{font-size:11.5px;color:var(--muted);line-height:1.5;min-height:34px}
.tpl-meta{display:flex;gap:10px;margin-top:13px;font-size:10.5px;color:var(--dim);font-family:var(--mono)}
.lab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:13px}
.lab-card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .15s,transform .15s;display:flex;flex-direction:column}
.lab-card:hover{border-color:var(--line2);transform:translateY(-2px)}
.lab-preview{height:86px;background:radial-gradient(circle at 30% 50%,rgba(45,212,191,.12),transparent 60%),linear-gradient(135deg,#0a1626,#0c1a2c);border-bottom:1px solid var(--border);position:relative;overflow:hidden}
.lab-preview svg{width:100%;height:100%}
.lab-card-body{padding:13px 14px 8px;display:flex;flex-direction:column;gap:4px}
.lab-card-body h3{font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lab-card-meta{display:flex;gap:12px;font-size:10.5px;color:var(--dim);font-family:var(--mono)}
.lab-card-actions{display:flex;gap:4px;padding:8px 10px 10px;margin-top:auto}
.lab-card-actions .btn{flex:1;padding:6px;font-size:11.5px}
.lab-card-actions .icon-btn{width:29px;height:29px;border:1px solid var(--border);border-radius:7px}
.empty-state{text-align:center;padding:60px 20px;border:1px dashed var(--line);border-radius:var(--radius);background:rgba(13,22,38,.4)}
.empty-state h3{margin:14px 0 5px;font-size:15px}
.empty-state p{color:var(--muted);font-size:12.5px;margin-bottom:18px}

/* ---------- workspace ---------- */
.workspace{flex:1;display:flex;flex-direction:column;min-height:0;background:var(--bg2)}
.ws-toolbar{height:48px;flex:none;display:flex;align-items:center;gap:14px;padding:0 12px;border-bottom:1px solid var(--border);background:rgba(10,17,29,.9)}
.tool-label{display:flex;align-items:center;gap:7px;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.tool-label svg{width:14px;height:14px;color:var(--accent)}
.palette-search{position:relative;flex:0 0 210px}
.palette-search svg{position:absolute;left:9px;top:50%;transform:translateY(-50%);width:14px;height:14px;color:var(--dim)}
.palette-search input{width:100%;background:#0a1220;border:1px solid var(--border);border-radius:8px;padding:6px 9px 6px 29px;font-size:12px;outline:none}
.palette-search input:focus{border-color:rgba(45,212,191,.45)}
.palette-cats{display:flex;gap:2px;flex:1;overflow-x:auto;min-width:0}
.palette-cat{border:1px solid transparent;background:transparent;color:var(--muted);padding:5px 10px;border-radius:7px;font-size:11.5px;font-weight:600;white-space:nowrap}
.palette-cat:hover{background:rgba(255,255,255,.04);color:var(--text)}
.palette-cat.active{background:rgba(45,212,191,.1);color:#7ff3e5;border-color:rgba(45,212,191,.25)}
.ws-hint{font-size:10.5px;color:var(--dim);white-space:nowrap;padding-left:10px;border-left:1px solid var(--border)}
.ws-body{flex:1;display:flex;min-height:0;position:relative}
.palette{width:252px;flex:none;background:linear-gradient(180deg,#0b1322,#0a111d);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}
.palette-list{flex:1;overflow:auto;padding:10px;display:flex;flex-direction:column;gap:6px}
.palette-group-title{font-size:9.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);padding:8px 5px 3px}
.device-card{display:flex;align-items:center;gap:9px;padding:7px 8px;border:1px solid var(--border);border-radius:9px;background:rgba(17,29,49,.5);cursor:grab;user-select:none;transition:border-color .12s,background .12s;text-align:left;width:100%}
.device-card:hover{border-color:var(--line2);background:rgba(22,35,58,.75)}
.device-card.selected{border-color:rgba(45,212,191,.55);background:rgba(45,212,191,.07);box-shadow:0 0 0 1px rgba(45,212,191,.15)}
.device-card .d-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex:none;border:1px solid color-mix(in srgb,var(--brand) 35%,transparent);background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand)}
.device-card .d-icon svg{width:20px;height:20px}
.device-card>span:last-child{display:flex;flex-direction:column;min-width:0;flex:1;text-align:left}
.device-card .d-name{display:block;font-size:12px;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.device-card .d-meta{display:block;font-size:10px;color:var(--dim);font-family:var(--mono);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.palette-foot{padding:10px;border-top:1px solid var(--border)}
.canvas-wrap{flex:1;position:relative;min-width:0;overflow:hidden;background:radial-gradient(900px 500px at 50% 0,rgba(56,189,248,.04),transparent 70%),#080e18}
#canvas{width:100%;height:100%;display:block;touch-action:none;cursor:default}
#canvas.panning{cursor:grabbing}
#canvas.cable-mode{cursor:crosshair}
#canvas.pdu-mode{cursor:crosshair}
.canvas-overlay{position:absolute;inset:0;pointer-events:none;display:flex;flex-direction:column;justify-content:space-between;padding:12px}
.canvas-legend{display:flex;gap:12px;font-size:10px;color:var(--dim);background:rgba(8,14,24,.65);border:1px solid var(--border);padding:5px 9px;border-radius:7px;align-self:flex-start;backdrop-filter:blur(4px)}
.canvas-legend span{display:flex;align-items:center;gap:5px}
.led{width:6px;height:6px;border-radius:50%;display:inline-block;background:#475569}
.led.up{background:var(--green);box-shadow:0 0 6px rgba(52,211,153,.6)}
.led.blocked{background:var(--amber);box-shadow:0 0 6px rgba(251,191,36,.5)}
.led.down{background:var(--red)}
.canvas-empty{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);text-align:center;color:var(--muted);background:rgba(8,14,24,.7);border:1px dashed var(--line);border-radius:16px;padding:28px 34px;backdrop-filter:blur(6px);pointer-events:none}
.canvas-empty h3{font-size:14px;margin:12px 0 4px;color:var(--text)}
.canvas-empty p{font-size:11.5px;max-width:260px}
.cable-cursor{position:absolute;width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(45,212,191,.15);pointer-events:none;transform:translate(-50%,-50%);z-index:5}
.packet-tooltip{position:absolute;z-index:10;background:#0b1524;border:1px solid var(--line2);border-radius:8px;padding:7px 9px;font-family:var(--mono);font-size:10px;line-height:1.5;pointer-events:none;box-shadow:0 8px 24px rgba(0,0,0,.4);max-width:240px}
.inspector{width:336px;flex:none;background:linear-gradient(180deg,#0b1322,#0a111d);border-left:1px solid var(--border);overflow:auto;min-height:0}
.inspector-empty{padding:44px 28px;text-align:center;color:var(--muted)}
.inspector-empty h3{font-size:13.5px;margin:13px 0 6px;color:var(--text)}
.inspector-empty p{font-size:11.5px;line-height:1.6}
.inspector-body{padding:14px}
.insp-head{display:flex;gap:11px;align-items:flex-start;padding-bottom:12px;border-bottom:1px solid var(--border)}
.insp-head .d-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex:none;border:1px solid color-mix(in srgb,var(--brand) 35%,transparent);background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand)}
.insp-head .d-icon svg{width:24px;height:24px}
.insp-title{flex:1;min-width:0}
.insp-title h3{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.insp-title .sub{font-size:10.5px;color:var(--dim);font-family:var(--mono);margin-top:2px}
.insp-actions{display:flex;gap:5px;padding:10px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}
.insp-section{padding:12px 0;border-bottom:1px solid var(--border)}
.insp-section:last-child{border-bottom:0}
.insp-section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.insp-section h4{font-size:10px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:var(--dim)}
.insp-kv{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:11px}
.insp-kv dt{color:var(--dim)}
.insp-kv dd{margin:0;font-family:var(--mono);font-size:10.5px;color:var(--text);overflow-wrap:anywhere}
.iface-table{width:100%;border-collapse:collapse;font-size:10px;font-family:var(--mono)}
.iface-table th{text-align:left;color:var(--dim);font-weight:600;padding:4px 5px;border-bottom:1px solid var(--border);font-size:9px;text-transform:uppercase;letter-spacing:.06em}
.iface-table td{padding:4px 5px;border-bottom:1px solid rgba(28,42,66,.6);vertical-align:middle;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:120px}
.iface-table tr:last-child td{border-bottom:0}
.iface-name{color:#bae6fd}
.iface-state{display:inline-flex;align-items:center;gap:4px}
.badge{display:inline-flex;align-items:center;padding:1px 5px;border-radius:4px;font-size:9px;font-weight:700;letter-spacing:.02em;border:1px solid transparent;white-space:nowrap}
.badge.up{background:rgba(52,211,153,.1);color:#6ee7b7;border-color:rgba(52,211,153,.2)}
.badge.down{background:rgba(248,113,113,.08);color:#fca5a5;border-color:rgba(248,113,113,.2)}
.badge.blocked{background:rgba(251,191,36,.09);color:#fcd34d;border-color:rgba(251,191,36,.2)}
.badge.vlan{background:rgba(56,189,248,.08);color:#7dd3fc;border-color:rgba(56,189,248,.2)}
.badge.trunk{background:rgba(167,139,250,.09);color:#c4b5fd;border-color:rgba(167,139,250,.2)}
.badge.brand{background:rgba(255,255,255,.04);color:var(--muted);border-color:var(--border)}
.quick-form{display:grid;gap:7px}
.quick-form .row2{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.field{display:flex;flex-direction:column;gap:3px}
.field label{font-size:9.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--dim)}
.field input,.field select,.field textarea{background:#0a1220;border:1px solid var(--border);border-radius:7px;padding:6px 8px;font-size:11.5px;outline:none;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(45,212,191,.5)}
.field textarea{resize:vertical;min-height:56px;font-family:var(--mono);font-size:10.5px}
.insp-note{font-size:10px;color:var(--dim);line-height:1.5;margin-top:6px}
.chip-row{display:flex;flex-wrap:wrap;gap:4px}
.chip{font-size:9.5px;font-family:var(--mono);padding:2px 6px;border:1px solid var(--border);border-radius:4px;background:rgba(0,0,0,.15);color:var(--muted)}
.service-tabs{display:flex;gap:3px;margin-bottom:8px}
.service-tabs button{flex:1;background:rgba(0,0,0,.18);border:1px solid var(--border);color:var(--muted);font-size:10px;font-weight:700;padding:4px;border-radius:5px}
.service-tabs button.active{background:rgba(45,212,191,.1);border-color:rgba(45,212,191,.3);color:#7ff3e5}
.small-btn{background:rgba(45,212,191,.08);border:1px solid rgba(45,212,191,.25);color:#7ff3e5;border-radius:5px;font-size:9.5px;padding:3px 7px;font-weight:700}
.small-btn:hover{background:rgba(45,212,191,.15)}
.danger-btn{background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.25);color:#fca5a5;border-radius:5px;font-size:9.5px;padding:3px 7px;font-weight:700}

/* ---------- bottom dock ---------- */
.dock{height:280px;flex:none;display:flex;flex-direction:column;border-top:1px solid var(--border);background:#080e18;min-height:34px;transition:height .18s}
.dock.collapsed{height:35px}
.dock-tabs{height:34px;flex:none;display:flex;align-items:center;justify-content:space-between;background:#0b1322;border-bottom:1px solid var(--border);padding:0 6px}
.dock-tab-list{display:flex;align-items:center;gap:2px;overflow-x:auto;min-width:0;height:100%}
.dock-tab{display:flex;align-items:center;gap:6px;border:1px solid transparent;border-bottom:0;background:transparent;color:var(--dim);font-size:10.5px;padding:0 9px;height:100%;border-radius:0;white-space:nowrap}
.dock-tab svg{width:12px;height:12px}
.dock-tab:hover{color:var(--muted);background:rgba(255,255,255,.03)}
.dock-tab.active{color:var(--text);background:#080e18;border-color:var(--border);position:relative}
.dock-tab.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:#080e18}
.dock-tab .tab-close{width:14px;height:14px;border-radius:3px;display:inline-flex;align-items:center;justify-content:center;margin-left:2px;color:var(--faint)}
.dock-tab .tab-close:hover{background:rgba(255,255,255,.1);color:var(--text)}
.dock-tab .tab-close svg{width:10px;height:10px}
.dock-content{flex:1;position:relative;min-height:0;overflow:hidden}
.dock.collapsed .dock-content{display:none}
.dock-actions{display:flex;gap:2px;color:var(--dim)}
.dock.collapsed #btn-dock-collapse svg{transform:rotate(180deg)}
.statusbar{height:25px;flex:none;display:flex;align-items:center;gap:10px;padding:0 12px;background:#0b1322;border-top:1px solid var(--border);font-size:10px;color:var(--dim);font-family:var(--mono)}
.statusbar .divider{width:1px;height:11px;background:var(--border)}
.statusbar-right{margin-left:auto;color:var(--faint)}
.terminal{display:flex;flex-direction:column;height:100%;background:#050a12}
.term-toolbar{display:flex;align-items:center;justify-content:space-between;padding:4px 10px;border-bottom:1px solid var(--border);background:#0a1220;flex:none}
.term-title{font-family:var(--mono);font-size:10px;color:var(--muted);display:flex;align-items:center;gap:6px}
.term-title .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 5px rgba(52,211,153,.5)}
.term-title .dot.off{background:var(--red);box-shadow:none}
.term-scroll{flex:1;overflow:auto;padding:9px 13px;font-family:var(--mono);font-size:12px;line-height:1.5;white-space:pre-wrap;word-break:break-word;color:#c7d5e8}
.term-line{min-height:1.5em}
.t-green{color:#6ee7b7}.t-red{color:#fca5a5}.t-amber{color:#fcd34d}.t-cyan{color:#67e8f9}.t-violet{color:#c4b5fd}.t-dim{color:#5d6f88}.t-white{color:#e8eef8}.t-bright{color:#fff;font-weight:700}
.term-input-row{flex:none;display:flex;align-items:center;gap:7px;padding:7px 13px;border-top:1px solid var(--border);background:#070d17}
.term-prompt{font-family:var(--mono);font-size:12px;color:#7ff3e5;white-space:nowrap;max-width:55%;overflow:hidden;text-overflow:ellipsis}
.term-input{flex:1;background:transparent;border:0;outline:none;color:#e8eef8;font-family:var(--mono);font-size:12px;caret-color:var(--accent);min-width:0}
.term-hint{font-size:9px;color:var(--faint);padding:3px 13px;border-top:1px solid rgba(28,42,66,.5);background:#060c15;flex:none}
.events-view{height:100%;display:flex;flex-direction:column;background:#080e18}
.events-toolbar{display:flex;align-items:center;gap:8px;padding:5px 10px;border-bottom:1px solid var(--border);flex:none;background:#0a1220}
.events-toolbar .filters{display:flex;gap:3px;flex-wrap:wrap}
.filter-chip{border:1px solid var(--border);background:transparent;color:var(--dim);font-size:9px;font-family:var(--mono);padding:2px 6px;border-radius:4px}
.filter-chip.active{border-color:rgba(45,212,191,.35);background:rgba(45,212,191,.08);color:#7ff3e5}
.events-toolbar .spacer{flex:1}
.events-list{flex:1;overflow:auto;font-family:var(--mono);font-size:10.5px}
.event-row{display:grid;grid-template-columns:56px 128px 1fr 130px;gap:8px;padding:4px 10px;border-bottom:1px solid rgba(28,42,66,.45);cursor:pointer;align-items:center}
.event-row:hover{background:rgba(56,189,248,.04)}
.event-row.selected{background:rgba(45,212,191,.07)}
.event-row .e-time{color:var(--faint)}
.event-row .e-device{color:#7dd3fc;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.event-row .e-summary{color:#c7d5e8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.event-row .e-proto{justify-self:end}
.event-row.highlight{animation:eventIn .35s ease}
@keyframes eventIn{from{background:rgba(45,212,191,.18)}to{background:transparent}}
.proto-pill{font-size:8.5px;font-weight:700;padding:1px 5px;border-radius:3px;border:1px solid}
.proto-arp{color:#fcd34d;border-color:rgba(251,191,36,.3);background:rgba(251,191,36,.07)}
.proto-icmp{color:#6ee7b7;border-color:rgba(52,211,153,.3);background:rgba(52,211,153,.07)}
.proto-tcp{color:#7dd3fc;border-color:rgba(56,189,248,.3);background:rgba(56,189,248,.07)}
.proto-udp{color:#c4b5fd;border-color:rgba(167,139,250,.3);background:rgba(167,139,250,.07)}
.proto-dhcp{color:#fca5a5;border-color:rgba(248,113,113,.3);background:rgba(248,113,113,.07)}
.proto-dns{color:#f9a8d4;border-color:rgba(244,114,182,.3);background:rgba(244,114,182,.07)}
.proto-http{color:#fdba74;border-color:rgba(251,146,60,.3);background:rgba(251,146,60,.07)}
.proto-stp{color:#94a3b8;border-color:rgba(148,163,184,.3);background:rgba(148,163,184,.07)}
.packet-view{height:100%;display:grid;grid-template-columns:320px 1fr;min-height:0}
.packet-side{border-right:1px solid var(--border);overflow:auto;padding:12px}
.packet-side h4{font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.packet-main{overflow:auto;padding:14px 18px}
.packet-placeholder{color:var(--dim);font-size:11.5px;padding:24px;text-align:center}
.layer-card{border:1px solid var(--border);border-radius:8px;margin-bottom:8px;overflow:hidden;background:rgba(13,22,38,.5)}
.layer-head{display:flex;align-items:center;justify-content:space-between;padding:6px 9px;background:rgba(22,35,58,.7);border-bottom:1px solid var(--border)}
.layer-head strong{font-size:10.5px}
.layer-head .layer-num{font-family:var(--mono);font-size:9px;color:var(--accent)}
.layer-body{padding:7px 9px;font-family:var(--mono);font-size:10px;line-height:1.7;color:var(--muted)}
.layer-body .kv{display:grid;grid-template-columns:130px 1fr;gap:1px 8px}
.layer-body .kv span:nth-child(odd){color:var(--faint)}
.layer-body .kv span:nth-child(even){color:#c7d5e8;overflow-wrap:anywhere}
.flow-summary{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.flow-summary h3{font-size:13px;margin:0}
.flow-summary .arrow{color:var(--dim)}
.flow-meta{font-size:10px;color:var(--dim);font-family:var(--mono)}
details.pdu-row{border:1px solid var(--border);border-radius:7px;margin-bottom:5px;background:rgba(13,22,38,.35)}
details.pdu-row>summary{padding:6px 8px;font-size:10.5px;cursor:pointer;display:flex;align-items:center;gap:7px;list-style:none}
details.pdu-row>summary::-webkit-details-marker{display:none}
details.pdu-row .step-info{padding:5px 10px 7px;font-family:var(--mono);font-size:9.5px;color:var(--muted);border-top:1px solid var(--border);line-height:1.6}

/* ---------- modals, menus, toasts ---------- */
.modal-root{position:fixed;inset:0;z-index:100;pointer-events:none}
.modal-backdrop{position:absolute;inset:0;background:rgba(3,7,14,.7);backdrop-filter:blur(4px);pointer-events:auto;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{width:min(520px,100%);max-height:86vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#101c2f,#0b1422);border:1px solid var(--line2);border-radius:16px;box-shadow:var(--shadow);pointer-events:auto;overflow:hidden}
.modal.wide{width:min(760px,100%)}
.modal.narrow{width:min(400px,100%)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-head h2{font-size:16px;letter-spacing:-.01em}
.modal-head p{font-size:11.5px;color:var(--dim);margin-top:2px}
.modal-body{padding:18px 20px;overflow:auto}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;padding:13px 20px;border-top:1px solid var(--border);background:rgba(0,0,0,.14)}
.modal .field{margin-bottom:11px}
.modal .field label{font-size:10.5px}
.modal .field input,.modal .field select,.modal .field textarea{font-size:12.5px;padding:9px 10px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.port-list{display:flex;flex-direction:column;gap:5px}
.port-option{display:flex;align-items:center;justify-content:space-between;gap:10px;background:rgba(0,0,0,.16);border:1px solid var(--border);border-radius:8px;padding:8px 10px;text-align:left;width:100%}
.port-option:hover{border-color:rgba(45,212,191,.45);background:rgba(45,212,191,.05)}
.port-option.unavailable{opacity:.4;pointer-events:none}
.port-option .p-name{font-family:var(--mono);font-size:11px;color:#bae6fd}
.port-option .p-desc{font-family:var(--mono);font-size:9px;color:var(--dim);margin-top:2px}
.port-option .p-side{font-size:9px;color:var(--faint);font-family:var(--mono);text-align:right;white-space:nowrap}
.inline-note{font-size:11px;color:var(--dim);background:rgba(56,189,248,.05);border:1px solid rgba(56,189,248,.15);border-radius:8px;padding:9px 11px;line-height:1.55}
.inline-note.warn{background:rgba(251,191,36,.06);border-color:rgba(251,191,36,.2);color:#e2c07a}
.switch-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:12px}
.switch-row:last-child{border-bottom:0}
.toggle{position:relative;width:34px;height:19px;background:#26364f;border-radius:20px;border:0;flex:none}
.toggle::after{content:"";position:absolute;left:2px;top:2px;width:15px;height:15px;border-radius:50%;background:#94a3b8;transition:.15s}
.toggle.on{background:rgba(45,212,191,.35)}
.toggle.on::after{left:17px;background:var(--accent)}
.context-menu{position:fixed;width:196px;background:var(--panel2);border:1px solid var(--line2);border-radius:9px;box-shadow:var(--shadow);padding:5px;z-index:150}
.context-menu button{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:transparent;border:0;border-radius:6px;padding:7px 9px;font-size:11.5px;color:var(--muted)}
.context-menu button:hover{background:rgba(255,255,255,.06);color:var(--text)}
.context-menu button svg{width:14px;height:14px}
.context-menu hr{border:0;border-top:1px solid var(--border);margin:4px 2px}
.toast-root{position:fixed;right:16px;bottom:16px;z-index:200;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{pointer-events:auto;min-width:260px;max-width:380px;background:linear-gradient(180deg,#13223a,#0d1727);border:1px solid var(--line2);border-radius:10px;padding:11px 13px;font-size:12px;box-shadow:var(--shadow);display:flex;gap:9px;align-items:flex-start;animation:toastIn .2s ease}
.toast svg{width:16px;height:16px;flex:none;margin-top:1px}
.toast.ok{border-color:rgba(52,211,153,.35)}.toast.ok svg{color:var(--green)}
.toast.err{border-color:rgba(248,113,113,.35)}.toast.err svg{color:var(--red)}
.toast.info svg{color:var(--accent2)}
.toast.warn svg{color:var(--amber)}
.toast .toast-body{flex:1}
.toast strong{display:block;font-size:11.5px;margin-bottom:1px}
.toast span{color:var(--muted);font-size:10.5px;line-height:1.45}
@keyframes toastIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.kbd{font-family:var(--mono);font-size:9.5px;background:rgba(255,255,255,.06);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:1px 4px;color:var(--muted)}
.spinner{width:15px;height:15px;border:2px solid rgba(255,255,255,.15);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* SVG canvas */
.device-group{cursor:grab}
.device-group.dragging{cursor:grabbing}
.device-group .device-label{font-family:var(--sans);font-size:11px;font-weight:700;fill:#dbe7f6;text-anchor:middle;pointer-events:none}
.device-group .device-sublabel{font-family:var(--mono);font-size:8px;fill:#7488a3;text-anchor:middle;pointer-events:none}
.device-group .hit{fill:transparent}
.device-group.selected .sel-ring{stroke:var(--accent);stroke-width:1.6;fill:none;stroke-dasharray:4 3}
.device-group:hover .sel-ring{stroke:rgba(45,212,191,.35);stroke-width:1.3;fill:none}
.link-group{cursor:pointer}
.link-path{fill:none;stroke-linecap:round}
.link-hit{fill:none;stroke:transparent;stroke-width:14}
.link-label{font-family:var(--mono);font-size:7.5px;fill:#5d6f88;text-anchor:middle;pointer-events:none}
.link-badge{font-family:var(--mono);font-size:7px;fill:#0b1422;text-anchor:middle;pointer-events:none}
.packet-token{filter:url(#glow)}
.pdu-token{animation:packetPulse 1.1s ease-in-out infinite}
@keyframes packetPulse{0%,100%{opacity:.75}50%{opacity:1}}

/* responsive */
@media (max-width:1100px){
  .hero{grid-template-columns:1fr;gap:36px}
  .auth-card{max-width:480px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .inspector{width:300px}
}
@media (max-width:900px){
  .landing-nav-links a{display:none}
  .feature-grid{grid-template-columns:1fr}
  .appbar{flex-wrap:nowrap;overflow-x:auto}
  .appbar-center{display:none}
  .ws-hint{display:none}
  .inspector{display:none}
  .palette{width:216px}
  .dashboard{padding:22px 18px 60px}
  .packet-view{grid-template-columns:1fr}
  .packet-side{display:none}
  .event-row{grid-template-columns:50px 1fr 80px}
  .event-row .e-device{display:none}
  .lab-title-input{max-width:26vw}
}
@media (max-width:700px){
  .appbar .brand-text{display:none}
  .appbar .brand-mark{width:28px;height:28px}
  #save-state{display:none}
  #user-name{display:none}
  .appbar{padding:0 8px;gap:6px}
  .appbar-left{gap:6px}
  .appbar-right{gap:6px}
  .lab-title-input{max-width:34vw;font-size:13px;padding:4px 2px;min-width:80px}
  #btn-zoom-in,#btn-zoom-out,#btn-fit,#btn-export{display:none!important}
  #workspace-tools{border:0;background:transparent;padding:0}
  .dock{height:235px}
  .event-row{grid-template-columns:52px 1fr 70px;font-size:10px}
  .events-toolbar .filters{gap:2px}
}
@media (max-width:640px){
  .landing-nav{padding:16px}
  .hero{padding:26px 16px 50px}
  .features,.how,.vendors{padding-left:16px;padding-right:16px}
  .hero-stats{gap:22px}
  .auth-card{padding:18px}
  .palette{width:64px}
  .palette-list{padding:6px;gap:5px}
  .device-card .d-name,.device-card .d-meta{display:none}
  .device-card{justify-content:center;padding:6px}
  .palette-group-title{display:none}
  .palette-foot{display:none}
  .ws-toolbar{gap:8px;padding:0 8px}
  .palette-search{flex:1}
  .palette-cats{display:none}
  .lab-title-input{max-width:20vw}
  .user-chip span:not(.avatar){display:none}
  .dashboard{padding:18px 14px 60px}
  .dash-hero{align-items:flex-start;flex-direction:column}
  .template-grid,.lab-grid{grid-template-columns:1fr}
}