@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6366F1;--primary-light:#818CF8;--primary-glow:rgba(99,102,241,.18);
  --accent:#22D3EE;--green:#22C55E;
  --bg:#0F1117;--bg2:#1A1D2E;--bg-card:rgba(26,29,46,.85);
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;
  --border:rgba(148,163,184,.1);--radius:12px;--radius-sm:8px;
  --font:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',monospace;
  --tr:.25s ease;
}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,.04) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:1060px;margin:0 auto;padding:24px 20px 60px}
.hdr{text-align:center;padding:40px 0 24px}
.hdr__icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),var(--accent));font-size:32px;margin-bottom:16px;box-shadow:0 8px 30px var(--primary-glow);animation:fl 3s ease-in-out infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.hdr h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--text),var(--primary-light));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hdr p{color:var(--text2);font-size:.95rem;margin:8px auto 0}
.main-grid{display:grid;grid-template-columns:320px 1fr;gap:16px;align-items:start}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;backdrop-filter:blur(16px);margin-bottom:12px}
.card-title{font-size:.9rem;font-weight:700;margin-bottom:10px}
.chart-card{padding:8px;position:sticky;top:20px}
#histCanvas{width:100%;border-radius:var(--radius-sm);background:var(--bg)}
.code-area{width:100%;padding:12px;font-family:var(--mono);font-size:.78rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none;resize:vertical;line-height:1.5}
.code-area:focus{border-color:var(--primary)}
.btn{padding:9px 16px;font-family:var(--font);font-size:.82rem;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#4F46E5}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.ctrl{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.ctrl label{font-size:.72rem;font-weight:600;color:var(--text3);min-width:40px}
.ctrl input[type="range"]{flex:1;accent-color:var(--primary)}
.ctrl span{font-size:.72rem;color:var(--text2);min-width:36px}
.input-sm{width:80px;padding:6px 8px;font-family:var(--font);font-size:.78rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none}
.input-sm:focus{border-color:var(--primary)}
.check{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--text2);cursor:pointer;margin-bottom:6px}
.check input{accent-color:var(--primary)}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.stat{background:var(--bg);border-radius:var(--radius-sm);padding:8px}
.stat-label{font-size:.64rem;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.5px}
.stat-value{font-size:.88rem;font-weight:700;margin-top:2px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);padding:10px 20px;background:var(--bg2);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--text);font-size:.85rem;font-weight:500;z-index:1000;opacity:0;transition:all .3s ease;pointer-events:none}
.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:700px){.main-grid{grid-template-columns:1fr}.chart-card{position:static}.app{padding:16px 12px 48px}.hdr h1{font-size:1.5rem}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--bg2);border-radius:3px}
::selection{background:var(--primary);color:var(--bg)}