:root{
  --bg:#0A0E1A;
  --bg-soft:#0F1421;
  --bg-elev:rgba(255,255,255,.02);
  --line:rgba(255,255,255,.06);
  --line-strong:rgba(255,255,255,.12);
  --line-bright:rgba(255,255,255,.22);
  --text:#FAFAFA;
  --text-dim:#A0AABF;
  --text-mute:#6B7280;
  --accent:#3B82F6;
  --accent-2:#8B5CF6;
  --accent-3:#06B6D4;
  --ok:#10B981;
  --radius:14px;
  --ease:cubic-bezier(.16,1,.3,1);
  --nav-bg:rgba(10,14,26,.6);
  --dot-color:rgba(255,255,255,.05);
  --btn-primary-bg:#fff;
  --btn-primary-text:var(--bg);
  --grad-bg-1:rgba(59,130,246,.10);
  --grad-bg-2:rgba(139,92,246,.08);
  --grad-bg-3:rgba(6,182,212,.05);
  --particle-r:59; --particle-g:130; --particle-b:246;
  --line-r:139; --line-g:92; --line-b:246;
}
*{box-sizing:border-box;margin:0;padding:0}
::selection{background:rgba(59,130,246,.35);color:#fff}
html{scroll-behavior:smooth}
html,body{background:var(--bg);color:var(--text);font-family:'Inter','HarmonyOS Sans','PingFang SC',sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background .5s var(--ease),color .5s var(--ease)}
body{
  background-image:
    radial-gradient(1200px 600px at 80% -10%, var(--grad-bg-1), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, var(--grad-bg-2), transparent 60%),
    radial-gradient(800px 400px at 50% 100%, var(--grad-bg-3), transparent 60%);
  min-height:100vh;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;
  background-image:radial-gradient(var(--dot-color) 1px, transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(ellipse at 50% 30%, black 40%, transparent 75%);
  z-index:0;
}
canvas#net{position:fixed;inset:0;z-index:0;opacity:.5}
main{position:relative;z-index:1}
a{color:inherit;text-decoration:none}

.container{max-width:1280px;margin:0 auto;padding:0 20px}
.section{max-width:1400px;margin:0 auto;padding:80px}
.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:48px;gap:24px}
.section-head h2{font-family:'Space Grotesk';font-size:clamp(28px,3.5vw,40px);font-weight:600;letter-spacing:-.01em}
.section-head h2 .num{font-family:'JetBrains Mono';color:var(--text-mute);font-size:.55em;margin-right:14px;font-weight:500}
.section-head .meta{font-family:'JetBrains Mono';font-size:12px;color:var(--text-mute);white-space:nowrap}

.tag{font-size:11px;padding:4px 10px;border-radius:100px;background:rgba(59,130,246,.1);color:var(--accent);font-family:'JetBrains Mono';border:1px solid rgba(59,130,246,.2)}
.tag.alt{background:rgba(139,92,246,.1);color:var(--accent-2);border-color:rgba(139,92,246,.2)}
.tag.ok{background:rgba(16,185,129,.1);color:var(--ok);border-color:rgba(16,185,129,.2)}

h1{font-family:'Space Grotesk';font-size:clamp(32px,5vw,56px);font-weight:700;margin-bottom:20px}
h2{font-family:'Space Grotesk';font-size:clamp(28px,3.5vw,40px);font-weight:600}
h3{font-family:'Space Grotesk';font-size:22px;font-weight:600}
h4{font-family:'Space Grotesk';font-size:18px;font-weight:600}

p{font-size:15px;line-height:1.7;color:var(--text-dim);margin-bottom:16px}

@media (max-width:960px){
  .section{padding-left:24px;padding-right:24px}
}

/* ─── Animations ────────────────────────────────────────────────── */
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}
@keyframes shimmer{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

.anim-up{opacity:0;transform:translateY(22px);transition:opacity .72s cubic-bezier(.16,1,.3,1),transform .72s cubic-bezier(.16,1,.3,1)}
.anim-up.visible{opacity:1;transform:translateY(0)}
.anim-child{opacity:0;transform:translateY(14px);transition:opacity .5s cubic-bezier(.16,1,.3,1),transform .5s cubic-bezier(.16,1,.3,1)}
.anim-child.visible{opacity:1;transform:translateY(0)}

/* ─── Demo Page Components ───────────────────────────────────────── */

/* Gradient section title */
.demo-section-title{
  background:linear-gradient(120deg,var(--text) 0%,rgba(250,250,250,.9) 45%,var(--accent) 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  display:inline-block;
}

/* Inline keyword highlight */
.kw-num{
  font-family:'Space Grotesk';font-weight:700;color:var(--accent);
  background:rgba(59,130,246,.12);padding:1px 5px;border-radius:4px;font-size:1.02em;
  white-space:nowrap;
}
.kw-ok{font-weight:700;color:var(--ok)}
.kw-warn{font-weight:700;color:#f59e0b}
.kw-2{font-weight:700;color:var(--accent-2)}

/* Metric value glow */
.metric-card-v2 .mval{transition:text-shadow .4s}
.metric-card-v2 .mval{text-shadow:0 0 18px rgba(59,130,246,.25)}
.metric-card-v2:hover .mval{text-shadow:0 0 32px rgba(59,130,246,.55)}
.metric-card-v2 .mval.purple{text-shadow:0 0 18px rgba(139,92,246,.3)}
.metric-card-v2:hover .mval.purple{text-shadow:0 0 32px rgba(139,92,246,.6)}
.metric-card-v2 .mval.green{text-shadow:0 0 18px rgba(16,185,129,.3)}
.metric-card-v2:hover .mval.green{text-shadow:0 0 32px rgba(16,185,129,.6)}
.metric-card-v2 .mval.cyan{text-shadow:0 0 18px rgba(6,182,212,.3)}
.metric-card-v2:hover .mval.cyan{text-shadow:0 0 32px rgba(6,182,212,.6)}

/* Flow box enhanced hover */
.flow-box{transition:all .25s cubic-bezier(.16,1,.3,1)}
.flow-box:hover{transform:translateY(-2px);color:var(--text)}
.flow-box.accent:hover{background:rgba(59,130,246,.14);border-color:rgba(59,130,246,.7)}
.flow-box.purple:hover{background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.7)}
.flow-box.ok:hover{background:rgba(16,185,129,.14);border-color:rgba(16,185,129,.7)}
.flow-box:not(.accent):not(.purple):not(.ok):hover{border-color:var(--line-strong)}

/* Card enhanced */
.card-v2{transition:border-color .3s,transform .3s,box-shadow .3s}
.card-v2:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,0,0,.18)}

/* Table row */
.data-table tbody tr{transition:background .15s}
.data-table tbody tr:hover td{background:rgba(59,130,246,.04)!important}

/* Bullet list hover */
.bullet-list-v2 li{transition:color .2s;cursor:default}
.bullet-list-v2 li:hover{color:var(--text)}

/* Toggle v2 hover */
.toggle-v2{transition:background .2s}
.toggle-v2:hover{background:rgba(255,255,255,.015)}

/* Callout shimmer border */
.callout{position:relative;overflow:hidden}
.callout::after{
  content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.04),transparent);
  animation:shimmer 3s ease infinite;pointer-events:none;
}

/* Sticky nav */
.demo-nav{position:sticky;top:0;z-index:100;background:rgba(10,14,26,.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.demo-nav .inner{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:54px}
.demo-nav-back{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);transition:color .2s}
.demo-nav-back:hover{color:var(--text)}
.demo-nav-tags{display:flex;gap:8px}

/* Hero */
.demo-hero{padding:80px 0 56px;text-align:center;border-bottom:1px solid var(--line);background:linear-gradient(135deg,rgba(59,130,246,.06) 0%,rgba(139,92,246,.06) 50%,rgba(6,182,212,.04) 100%)}
.demo-eyebrow{font-family:'JetBrains Mono';font-size:11px;color:var(--text-mute);letter-spacing:.1em;text-transform:uppercase;margin-bottom:20px}
.demo-hero h1{font-size:clamp(2rem,5vw,3.8rem);margin-bottom:14px;background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.demo-subtitle{font-size:1.05rem;color:var(--text-dim);margin-bottom:24px;max-width:660px;margin-left:auto;margin-right:auto}
.demo-tags{display:flex;justify-content:center;flex-wrap:wrap;gap:8px}

/* Metric grid */
.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-top:44px}
.metric-card-v2{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px 14px;text-align:center;transition:border-color .3s,transform .3s}
.metric-card-v2:hover{border-color:var(--accent);transform:translateY(-3px)}
.metric-card-v2 .mval{font-family:'Space Grotesk';font-size:1.9rem;font-weight:700;color:var(--accent);line-height:1;margin-bottom:8px}
.metric-card-v2 .mval.purple{color:var(--accent-2)}
.metric-card-v2 .mval.cyan{color:var(--accent-3)}
.metric-card-v2 .mval.green{color:var(--ok)}
.metric-card-v2 .mlabel{font-size:12px;color:var(--text-dim);line-height:1.4}
.metric-card-v2 .msub{font-size:11px;color:var(--text-mute);margin-top:4px;font-family:'JetBrains Mono'}

/* Section wrapper */
.demo-section-wrap{padding:56px 0;border-bottom:1px solid var(--line)}
.demo-section-label{font-family:'JetBrains Mono';font-size:11px;color:var(--text-mute);text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px}
.demo-section-title{font-size:clamp(18px,2.5vw,26px);font-weight:700;margin-bottom:8px}
.demo-subtitle-sm{font-size:14px;color:var(--text-dim);margin-bottom:28px;line-height:1.7}

/* Layout grids */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* Card */
.card-v2{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card-v2 h4{font-size:14px;font-weight:600;margin-bottom:12px}

/* Flow chart */
.flow-wrap{display:flex;align-items:center;flex-wrap:wrap;gap:4px;margin:20px 0}
.flow-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:8px;padding:9px 14px;font-size:12px;font-weight:500;text-align:center;min-width:90px}
.flow-box.accent{border-color:rgba(59,130,246,.4);color:var(--accent);background:rgba(59,130,246,.06)}
.flow-box.purple{border-color:rgba(139,92,246,.4);color:var(--accent-2);background:rgba(139,92,246,.06)}
.flow-box.ok{border-color:rgba(16,185,129,.4);color:var(--ok);background:rgba(16,185,129,.06)}
.flow-arrow{color:var(--accent);font-size:14px;margin:0 2px;flex-shrink:0}

/* Timeline */
.tl-wrap{position:relative;padding-left:22px;margin:16px 0}
.tl-wrap::before{content:'';position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{position:relative;margin-bottom:18px}
.tl-item::before{content:'';position:absolute;left:-18px;top:5px;width:8px;height:8px;border-radius:50%;background:var(--accent);border:2px solid var(--bg)}
.tl-item.purple::before{background:var(--accent-2)}
.tl-item.green::before{background:var(--ok)}
.tl-item h4{font-size:13px;font-weight:600;margin-bottom:4px}
.tl-item p{font-size:13px;color:var(--text-dim);margin:0;line-height:1.6}

/* Table */
.data-table{width:100%;border-collapse:collapse;font-size:13px;margin:14px 0}
.data-table th{background:var(--bg-soft);border:1px solid var(--line);padding:9px 13px;font-weight:600;color:var(--text-dim);text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.06em}
.data-table td{border:1px solid var(--line);padding:9px 13px;color:var(--text-dim);vertical-align:top;line-height:1.5}
.data-table tr:hover td{background:rgba(255,255,255,.02)}
.data-table td.hl{color:var(--accent);font-weight:600}
.data-table td.hl2{color:var(--accent-2);font-weight:600}
.data-table td.ok{color:var(--ok);font-weight:600}

/* Callout */
.callout{border-left:3px solid var(--accent);padding:13px 17px;background:rgba(59,130,246,.06);border-radius:0 8px 8px 0;margin:14px 0}
.callout.ok{border-color:var(--ok);background:rgba(16,185,129,.06)}
.callout.purple{border-color:var(--accent-2);background:rgba(139,92,246,.06)}
.callout strong{color:var(--accent)}
.callout.ok strong{color:var(--ok)}
.callout.purple strong{color:var(--accent-2)}
.callout p{font-size:13px;margin:0;line-height:1.6}

/* Bullet list v2 */
.bullet-list-v2{list-style:none;display:flex;flex-direction:column;gap:9px;margin:0}
.bullet-list-v2 li{padding-left:18px;position:relative;color:var(--text-dim);font-size:13px;line-height:1.6}
.bullet-list-v2 li::before{content:'→';position:absolute;left:0;color:var(--accent);font-weight:700}

/* Demo form */
.demo-form-wrap{background:rgba(15,20,33,.7);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:20px 0}
.form-label{display:block;margin-bottom:5px;font-weight:500;font-size:12px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em}
.form-input,.form-select,.form-textarea{width:100%;padding:9px 13px;background:var(--bg-soft);border:1px solid var(--line-strong);border-radius:8px;color:var(--text);font-family:inherit;font-size:13px;transition:border-color .2s}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--accent)}
.form-group{margin-bottom:14px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* Buttons */
.btn-primary{padding:10px 22px;background:linear-gradient(135deg,var(--accent),var(--accent-2));border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer;font-size:13px;transition:all .3s}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(59,130,246,.3)}
.btn-secondary{padding:10px 22px;background:transparent;border:1px solid var(--accent);border-radius:8px;color:var(--accent);font-weight:600;cursor:pointer;font-size:13px;transition:all .3s}
.btn-group{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}

/* Result output */
.result-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px}
.result-stat{background:var(--bg-soft);border:1px solid var(--line);border-radius:8px;padding:13px}
.result-stat .rs-label{font-size:10px;color:var(--text-mute);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px;font-family:'JetBrains Mono'}
.result-stat .rs-val{font-size:14px;font-weight:600;color:var(--ok)}
.output-box{background:var(--bg-soft);border:1px solid var(--line-strong);border-radius:8px;padding:16px;margin:10px 0;font-family:'JetBrains Mono';font-size:12px;line-height:1.8;color:var(--text-dim);white-space:pre-wrap;word-break:break-word;max-height:340px;overflow-y:auto}

/* Spinner */
.spinner-v2{display:inline-block;width:16px;height:16px;border:2px solid var(--line-strong);border-top-color:var(--accent);border-radius:50%;animation:spin2 .7s linear infinite;vertical-align:middle;margin-right:8px}
@keyframes spin2{to{transform:rotate(360deg)}}

/* Toggle v2 */
.toggle-v2{cursor:pointer;user-select:none;border-bottom:1px solid var(--line);padding:18px 0}
.toggle-v2:last-child{border-bottom:none}
.toggle-v2 h4{display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;margin:0}
.toggle-v2 h4::after{content:'▾';font-size:11px;color:var(--text-mute);transition:transform .3s}
.toggle-v2.open h4::after{transform:rotate(-180deg)}
.toggle-v2-body{display:none;padding:14px 0 4px}
.toggle-v2.open .toggle-v2-body{display:block}

/* Chat components */
.chat-wrap{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;height:540px}
.chat-head{padding:16px 20px;border-bottom:1px solid var(--line);background:rgba(15,20,33,.5);border-radius:var(--radius) var(--radius) 0 0}
.chat-head h4{font-size:14px;font-weight:600;margin:0}
.chat-head p{font-size:12px;color:var(--text-mute);margin:3px 0 0}
.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.msg{padding:10px 14px;border-radius:8px;font-size:13px;line-height:1.6;max-width:88%}
.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-radius:8px 0 8px 8px}
.msg.ai{align-self:flex-start;background:rgba(15,20,33,.7);border:1px solid var(--line-strong);border-radius:0 8px 8px 8px;color:var(--text-dim)}
.chat-input-wrap{padding:14px 16px;border-top:1px solid var(--line);display:flex;gap:8px}
.chat-input-wrap input{flex:1;padding:9px 12px;background:var(--bg-soft);border:1px solid var(--line-strong);border-radius:8px;color:var(--text);font-family:inherit;font-size:13px}
.chat-input-wrap input:focus{outline:none;border-color:var(--accent)}
.chat-input-wrap button{padding:9px 16px;background:var(--accent);border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer;font-size:13px}

/* Diagnosis panel */
.diag-panel{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.diag-item{padding:10px;margin-bottom:10px;background:rgba(15,20,33,.5);border-radius:6px;border-left:3px solid var(--accent)}
.diag-item.ok{border-left-color:var(--ok)}
.diag-item.warn{border-left-color:#f59e0b}
.diag-label{font-size:12px;font-weight:600;margin-bottom:2px}
.diag-val{font-size:11px;color:var(--text-mute);line-height:1.5}

/* Responsive */
@media(max-width:768px){
  .grid-2,.grid-3,.form-row,.result-row{grid-template-columns:1fr}
  .flow-wrap{flex-direction:column;align-items:flex-start}
  .flow-arrow{transform:rotate(90deg)}
  .demo-hero h1{font-size:2rem}
  .demo-section-wrap{padding:40px 0}
  .demo-form-wrap{padding:20px}
}