@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#546DE5;--primary-light:#778BEB;--primary-glow:rgba(84,109,229,.3);
  --accent:#F8A5C2;--green:#22C55E;--red:#EF4444;
  --bg:#0A0F1A;--bg2:#131A2B;--bg-card:rgba(19,26,43,.75);
  --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 20% 0%,rgba(84,109,229,.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 100%,rgba(248,165,194,.05) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:1200px;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;letter-spacing:-.02em}
.hdr p{color:var(--text2);font-size:.95rem;max-width:480px;margin:8px auto 0}

/* Tabs */
.tabs{display:flex;justify-content:center;gap:4px;margin-bottom:24px}
.tab{padding:10px 22px;font-family:var(--font);font-size:.85rem;font-weight:500;background:transparent;border:1px solid var(--border);color:var(--text2);border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.tab:hover{color:var(--text);border-color:var(--primary)}
.tab.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 12px var(--primary-glow)}

/* Grid */
.main-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}

/* Panel */
.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;backdrop-filter:blur(16px)}
.panel-title{font-size:1rem;font-weight:700;margin-bottom:16px}

/* Forms */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.8rem;font-weight:600;color:var(--text2);margin-bottom:6px}
.input,.select,.textarea{padding:10px 14px;font-family:var(--font);font-size:.85rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none;width:100%;transition:var(--tr)}
.textarea{resize:vertical}
.mono{font-family:var(--mono);font-size:.82rem}
.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(84,109,229,.15)}
.input-row{display:flex;gap:8px}

/* Checkbox */
.checkbox-list{display:flex;flex-wrap:wrap;gap:8px}
.checkbox{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--text2);cursor:pointer}
.checkbox input{accent-color:var(--primary)}

/* Dep search */
.dep-search{position:relative}
.dep-suggestions{position:absolute;top:100%;left:0;right:0;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);max-height:200px;overflow-y:auto;z-index:10;display:none}
.dep-suggestions.visible{display:block}
.dep-suggestion{padding:8px 14px;font-size:.82rem;cursor:pointer;transition:var(--tr)}
.dep-suggestion:hover{background:rgba(84,109,229,.15);color:var(--primary)}
.dep-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.dep-tag{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;background:rgba(84,109,229,.15);border:1px solid rgba(84,109,229,.3);border-radius:100px;font-size:.78rem;color:var(--primary-light)}
.dep-tag .remove{background:none;border:none;color:var(--text3);cursor:pointer;font-size:.85rem;padding:0;transition:var(--tr)}.dep-tag .remove:hover{color:var(--red)}

/* Env list */
.env-list{display:flex;flex-direction:column;gap:4px;margin-bottom:8px}
.env-item{display:flex;align-items:center;justify-content:space-between;padding:6px 10px;background:var(--bg);border-radius:var(--radius-sm);font-size:.82rem}
.env-item .key{font-family:var(--mono);font-weight:600;color:var(--accent)}
.env-item .val{font-family:var(--mono);color:var(--text2)}
.env-item .remove{background:none;border:none;color:var(--text3);cursor:pointer}

/* Output */
.output-col{position:sticky;top:24px}
.output-panel{min-height:400px}
.output-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.code-block{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;overflow-x:auto;max-height:70vh;overflow-y:auto;line-height:1.6}
.code-block code{font-family:var(--mono);font-size:.8rem;color:var(--text);white-space:pre}

/* Syntax highlights */
.nix-kw{color:#C792EA}.nix-str{color:#C3E88D}.nix-fn{color:#82AAFF}.nix-cmt{color:#546E7A;font-style:italic}.nix-attr{color:#F8A5C2}.nix-bool{color:#FF5370}

/* Buttons */
.btn{padding:10px 18px;font-family:var(--font);font-size:.85rem;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.btn-sm{padding:7px 14px;font-size:.8rem}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#4058D0}

/* Toast */
.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:768px){.main-grid{grid-template-columns:1fr}.output-col{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)}