@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6C5CE7;--primary-light:#A29BFE;--primary-glow:rgba(108,92,231,.18);
  --accent:#FD79A8;--green:#00B894;--red:#D63031;--yellow:#FDCB6E;
  --bg:#1A0D2E;--bg2:#2D1B4E;--bg-card:rgba(45,27,78,.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(108,92,231,.04) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:900px;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),#5B4CD4);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}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;backdrop-filter:blur(16px);margin-bottom:12px}
.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;flex-wrap:wrap;gap:8px}
.card-title{font-size:.9rem;font-weight:700;margin-bottom:0}
.code-area{width:100%;padding:12px;font-family:var(--mono);font-size:.76rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--primary-light);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-sm{padding:6px 12px;font-size:.75rem}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#5B4CD4}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
/* Stats */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px;text-align:center;backdrop-filter:blur(16px)}
.stat-num{font-size:1.3rem;font-weight:800;margin-bottom:2px}
.stat-label{font-size:.66rem;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.5px}
/* Plan tree */
.node{margin-left:20px;border-left:2px solid var(--border);padding-left:12px;margin-bottom:6px}
.node-header{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--bg);border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.node-header:hover{background:rgba(108,92,231,.08)}
.node-header.slowest{border-left:3px solid var(--accent);background:rgba(253,121,168,.06)}
.node-type{font-weight:700;font-size:.82rem}
.node-rel{font-family:var(--mono);font-size:.72rem;color:var(--primary-light)}
.node-metrics{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}
.metric{font-size:.66rem;padding:2px 6px;border-radius:4px;font-weight:600}
.metric-cost{background:rgba(108,92,231,.12);color:var(--primary-light)}
.metric-time{background:rgba(253,121,168,.12);color:var(--accent)}
.metric-rows{background:rgba(0,184,148,.12);color:var(--green)}
.metric-bad{background:rgba(214,48,49,.12);color:var(--red)}
.node-details{padding:6px 10px;font-size:.72rem;color:var(--text3);line-height:1.5}
.bar-bg{height:4px;background:var(--border);border-radius:2px;margin-top:4px}
.bar-fill{height:4px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .3s ease}
.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:640px){.stats-row{grid-template-columns:1fr 1fr}.app{padding:16px 12px 48px}.hdr h1{font-size:1.5rem}.node{margin-left:10px;padding-left:8px}}
::-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)}