@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --primary:#EF4444;--secondary:#F87171;--accent:#FECACA;
  --bg:#1C1917;--surface:#292524;--surface2:#34302E;
  --text:#FEF2F2;--text-dim:#A8A29E;--border:#44403C;
  --changed:#3B82F6;--missing:#EF4444;--extra:#FBBF24;--identical:#22C55E;
  --radius:10px;--font:'Inter',system-ui,sans-serif;
}

html{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6}
body{min-height:100vh;display:flex;flex-direction:column}

.header{padding:.75rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:.5rem;border-bottom:1px solid var(--border);flex-wrap:wrap}
.header h1{font-size:1rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--extra));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.header-actions{display:flex;gap:.3rem;flex-wrap:wrap}

.btn{padding:.35rem .7rem;border-radius:8px;font-size:.72rem;font-weight:600;cursor:pointer;border:none;transition:all .15s;display:inline-flex;align-items:center;gap:.3rem;font-family:var(--font)}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--secondary)}
.btn-ghost{background:transparent;color:var(--text-dim);border:1px solid var(--border)}.btn-ghost:hover{background:var(--surface2);color:var(--text)}

.main{flex:1;max-width:1000px;width:100%;margin:0 auto;padding:1rem}

/* Input panels */
.input-panels{display:grid;grid-template-columns:1fr auto 1fr;gap:.5rem;margin-bottom:1rem;align-items:start}
.input-panel{display:flex;flex-direction:column;gap:.3rem}
.input-panel label{font-size:.72rem;font-weight:700;color:var(--text-dim)}
.input-panel textarea{width:100%;min-height:120px;padding:.6rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-family:'Courier New',monospace;font-size:.78rem;resize:vertical;outline:none}
.input-panel textarea:focus{border-color:var(--primary)}
.swap-btn{align-self:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text-dim);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all .15s;margin-top:1.2rem}
.swap-btn:hover{border-color:var(--primary);color:var(--primary)}

/* Filter bar */
.filter-bar{display:flex;gap:.3rem;margin-bottom:.75rem;flex-wrap:wrap;align-items:center}
.filter-btn{padding:.3rem .6rem;border-radius:6px;font-size:.68rem;font-weight:600;cursor:pointer;border:1px solid var(--border);background:transparent;color:var(--text-dim);transition:all .15s;font-family:var(--font)}
.filter-btn.active{border-color:var(--primary);color:var(--primary);background:rgba(239,68,68,.08)}
.filter-btn .count{font-weight:800}

/* Stats */
.stats-row{display:flex;gap:.5rem;margin-bottom:.75rem;flex-wrap:wrap}
.stat{padding:.3rem .6rem;border-radius:6px;font-size:.68rem;font-weight:700}
.stat-identical{background:rgba(34,197,94,.1);color:var(--identical)}
.stat-changed{background:rgba(59,130,246,.1);color:var(--changed)}
.stat-missing{background:rgba(239,68,68,.1);color:var(--missing)}
.stat-extra{background:rgba(251,191,36,.1);color:var(--extra)}

/* Results */
.results{display:flex;flex-direction:column;gap:2px}
.diff-row{display:grid;grid-template-columns:24px 180px 1fr 1fr;gap:.3rem;padding:.35rem .5rem;border-radius:6px;font-size:.75rem;align-items:center;font-family:'Courier New',monospace;transition:background .1s}
.diff-row:hover{background:var(--surface)}
.diff-row .status-dot{width:10px;height:10px;border-radius:50%}
.dot-identical{background:var(--identical)}.dot-changed{background:var(--changed)}
.dot-missing{background:var(--missing)}.dot-extra{background:var(--extra)}
.diff-row .key{font-weight:700;color:var(--text);overflow:hidden;text-overflow:ellipsis}
.diff-row .val{color:var(--text-dim);overflow:hidden;text-overflow:ellipsis}
.val-masked{color:var(--text-dim);letter-spacing:2px}

.toggle-sm{padding:.25rem .5rem;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text-dim);font-size:.68rem;font-weight:600;cursor:pointer;font-family:var(--font);transition:all .15s}
.toggle-sm.on{background:var(--primary);color:#fff;border-color:transparent}

.toast{position:fixed;bottom:1.5rem;right:1.5rem;background:var(--surface);border:1px solid var(--primary);color:var(--primary);padding:.4rem .8rem;border-radius:8px;font-size:.72rem;font-weight:500;z-index:200;transform:translateY(80px);opacity:0;transition:all .3s}
.toast.show{transform:translateY(0);opacity:1}
@media(max-width:768px){.input-panels{grid-template-columns:1fr}.swap-btn{margin:0 auto;transform:rotate(90deg)}.diff-row{grid-template-columns:20px 120px 1fr}}