@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');
:root{--n950:#050A18;--n900:#0A1628;--n800:#0C2E58;--blue:#0681CD;--cyan:#22D3EE;--green:#10B981;--amber:#FBBF24;--red:#EF4444;--purple:#A78BFA;--txt:#fff;--txt2:#94A3B8;--txt3:#64748B;--glass:rgba(255,255,255,0.04);--border:rgba(255,255,255,0.08);--r:12px}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;background:var(--n950);color:var(--txt);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}

/* NAV */
.sim-nav{position:fixed;top:0;width:100%;z-index:100;padding:.75rem 2rem;background:rgba(5,10,24,.95);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.sim-nav-logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-family:'Space Grotesk',sans-serif;font-weight:700;color:var(--blue);font-size:1rem}
.sim-nav-logo img{width:32px;height:32px;object-fit:contain}
.sim-nav-badge{font-size:.65rem;padding:3px 10px;background:rgba(6,129,205,.15);border:1px solid rgba(6,129,205,.3);border-radius:20px;color:var(--cyan);font-weight:600;text-transform:uppercase;letter-spacing:.08em}
.sim-nav-back{color:var(--txt2);text-decoration:none;font-size:.85rem;font-weight:500;transition:color .2s}
.sim-nav-back:hover{color:#fff}

/* HERO */
.sim-hero{padding:6rem 2rem 3rem;text-align:center;background:radial-gradient(ellipse 70% 50% at 50% 0%,rgba(6,129,205,.1),transparent 60%),var(--n950)}
.sim-hero h1{font-family:'Space Grotesk',sans-serif;font-size:clamp(1.5rem,4vw,2.5rem);font-weight:800;margin-bottom:.75rem;letter-spacing:-.02em}
.sim-hero h1 span{background:linear-gradient(135deg,var(--blue),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sim-hero p{color:var(--txt2);max-width:600px;margin:0 auto 2rem;font-size:.95rem}

/* CONTROLS */
.sim-controls{display:flex;justify-content:center;gap:1rem;margin-bottom:2rem;flex-wrap:wrap;padding:0 1rem}
.sim-btn{padding:.6rem 1.4rem;border-radius:var(--r);font-weight:600;font-size:.85rem;cursor:pointer;transition:all .25s;border:none;font-family:inherit}
.sim-btn-start{background:var(--blue);color:var(--n950)}
.sim-btn-start:hover{background:#fff;transform:translateY(-1px)}
.sim-btn-reset{background:transparent;color:var(--txt2);border:1px solid var(--border)}
.sim-btn-reset:hover{border-color:var(--blue);color:#fff}
.sim-btn-speed{background:var(--glass);color:var(--txt2);border:1px solid var(--border)}
.sim-btn-speed.active{border-color:var(--cyan);color:var(--cyan)}

/* STATUS BAR */
.sim-status{text-align:center;margin-bottom:2.5rem;padding:0 1rem}
.sim-status-text{font-family:'JetBrains Mono',monospace;font-size:.8rem;color:var(--cyan);padding:.5rem 1.25rem;background:rgba(34,211,238,.06);border:1px solid rgba(34,211,238,.15);border-radius:var(--r);display:inline-block}

/* PIPELINE */
.sim-pipeline{max-width:1200px;margin:0 auto;padding:0 1.5rem 4rem;display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem}

.sim-stage{background:var(--glass);border:1px solid var(--border);border-radius:16px;padding:1.5rem;min-height:420px;display:flex;flex-direction:column;transition:all .4s}
.sim-stage.active{border-color:var(--blue);box-shadow:0 0 30px rgba(6,129,205,.1)}
.sim-stage.complete{border-color:var(--green)}

.sim-stage-header{display:flex;align-items:center;gap:.6rem;margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:1px solid var(--border)}
.sim-stage-num{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:.7rem;font-weight:700;flex-shrink:0;border:2px solid var(--border);color:var(--txt3);transition:all .3s}
.sim-stage.active .sim-stage-num{background:var(--blue);color:var(--n950);border-color:var(--blue)}
.sim-stage.complete .sim-stage-num{background:var(--green);color:var(--n950);border-color:var(--green)}
.sim-stage-title{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:.95rem}
.sim-stage-sub{font-size:.72rem;color:var(--txt3);text-transform:uppercase;letter-spacing:.08em}

/* CARDS INSIDE STAGES */
.sim-cards{flex:1;display:flex;flex-direction:column;gap:.6rem;overflow-y:auto;max-height:340px}
.sim-card{padding:.75rem;background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.06);border-radius:8px;font-size:.8rem;animation:cardIn .4s ease-out;transition:all .3s}
.sim-card:hover{border-color:rgba(255,255,255,.15)}
.sim-card-label{font-size:.65rem;text-transform:uppercase;letter-spacing:.06em;color:var(--txt3);margin-bottom:4px;font-weight:600}
.sim-card-value{color:var(--txt);font-weight:500;font-size:.82rem;line-height:1.4}
.sim-card-meta{font-family:'JetBrains Mono',monospace;font-size:.65rem;color:var(--txt3);margin-top:4px}
.sim-card-tag{display:inline-block;font-size:.6rem;padding:2px 6px;border-radius:4px;font-weight:600;margin-top:4px}
.sim-card-tag.signal{background:rgba(6,129,205,.15);color:var(--blue)}
.sim-card-tag.action{background:rgba(34,211,238,.12);color:var(--cyan)}
.sim-card-tag.guardrail{background:rgba(16,185,129,.12);color:var(--green)}
.sim-card-tag.alert{background:rgba(251,191,36,.12);color:var(--amber)}
.sim-card-tag.risk{background:rgba(239,68,68,.12);color:var(--red)}

@keyframes cardIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* METRICS BAR */
.sim-metrics{max-width:1200px;margin:0 auto 3rem;padding:0 1.5rem;display:grid;grid-template-columns:repeat(5,1fr);gap:1rem}
.sim-metric{background:var(--glass);border:1px solid var(--border);border-radius:var(--r);padding:1.25rem;text-align:center;transition:all .3s}
.sim-metric-val{font-family:'Space Grotesk',sans-serif;font-size:1.5rem;font-weight:700;color:var(--blue);margin-bottom:.25rem}
.sim-metric-label{font-size:.7rem;color:var(--txt3);text-transform:uppercase;letter-spacing:.06em;font-weight:600}

/* GUARDRAIL LOG */
.sim-log{max-width:1200px;margin:0 auto 3rem;padding:0 1.5rem}
.sim-log h3{font-family:'Space Grotesk',sans-serif;font-size:1.1rem;margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}
.sim-log h3::before{content:'';width:20px;height:1px;background:var(--green)}
.sim-log-entries{background:var(--glass);border:1px solid var(--border);border-radius:var(--r);padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.72rem;max-height:200px;overflow-y:auto;color:var(--txt3);line-height:1.8}
.sim-log-entry{animation:cardIn .3s ease-out}
.sim-log-entry .time{color:var(--txt3)}
.sim-log-entry .ok{color:var(--green)}
.sim-log-entry .warn{color:var(--amber)}
.sim-log-entry .block{color:var(--red)}
.sim-log-entry .info{color:var(--cyan)}

/* CTA */
.sim-cta{text-align:center;padding:3rem 2rem 5rem;background:linear-gradient(180deg,var(--n950),var(--n900))}
.sim-cta h2{font-family:'Space Grotesk',sans-serif;font-size:clamp(1.3rem,3vw,2rem);margin-bottom:.75rem}
.sim-cta p{color:var(--txt2);margin-bottom:1.5rem;font-size:.9rem}
.sim-cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:var(--n950);padding:.8rem 1.6rem;border-radius:var(--r);text-decoration:none;font-weight:700;font-size:.9rem;transition:all .3s}
.sim-cta-btn:hover{background:#fff;transform:translateY(-2px)}

/* RESPONSIVE */
@media(max-width:1024px){.sim-pipeline{grid-template-columns:1fr 1fr}.sim-metrics{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){.sim-pipeline{grid-template-columns:1fr}.sim-metrics{grid-template-columns:1fr 1fr}.sim-stage{min-height:auto}.sim-controls{flex-direction:column;align-items:center}}
@media(max-width:480px){.sim-metrics{grid-template-columns:1fr}}