*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#10B981;--primary-light:#34D399;--accent:#F59E0B;--accent-light:#FBBF24;
  --bg:#0F172A;--bg-surface:#1E293B;--bg-card:#1E293B;--bg-elevated:#334155;
  --text:#F1F5F9;--text-secondary:#94A3B8;--text-muted:#64748B;
  --border:rgba(16,185,129,0.15);--border-accent:rgba(16,185,129,0.35);
  --success:#10B981;--error:#EF4444;--warning:#F59E0B;
  --radius:10px;--transition:0.2s ease;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
.app{max-width:900px;margin:0 auto;padding:2rem 1.5rem;min-height:100vh;display:flex;flex-direction:column}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;flex-wrap:wrap;gap:0.75rem}
.logo{display:flex;align-items:center;gap:0.75rem}
.logo h1{font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.header-actions{display:flex;gap:0.375rem}
.btn{padding:0.625rem 1.125rem;border:none;border-radius:8px;font-family:inherit;font-size:0.8125rem;font-weight:600;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:0.375rem}
.btn-primary{background:linear-gradient(135deg,var(--primary),#059669);color:#fff;box-shadow:0 2px 12px rgba(16,185,129,0.35)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(16,185,129,0.5)}
.btn-sm{padding:0.5rem 0.875rem;background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);border-radius:8px}
.btn-sm:hover{border-color:var(--primary);color:var(--text)}
.converter-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:center;margin-bottom:1.5rem}
.converter-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;display:flex;flex-direction:column;gap:0.75rem}
.card-header{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em}
.source-header{color:var(--primary-light)}
.target-header{color:var(--accent)}
.arrow-divider{color:var(--text-muted);display:flex;align-items:center;justify-content:center}
.field label{display:block;font-size:0.75rem;color:var(--text-muted);margin-bottom:0.25rem;font-weight:600}
.field select{width:100%;padding:0.625rem 2rem 0.625rem 0.75rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:inherit;font-size:0.8125rem;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 0.625rem center;cursor:pointer}
.field select:focus,.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(16,185,129,0.12)}
.salary-row{display:flex;align-items:center;gap:0.375rem}
.currency-symbol{font-family:'JetBrains Mono',monospace;font-weight:700;color:var(--primary-light);font-size:1.125rem}
.salary-row input{flex:1;padding:0.625rem 0.75rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:600}
.result-value{font-family:'JetBrains Mono',monospace;font-size:1.5rem;font-weight:800;color:var(--accent);padding:0.5rem 0}
h2{font-size:1rem;font-weight:700;margin-bottom:0.75rem}
.breakdown-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0.75rem;margin-bottom:1.5rem}
.breakdown-item{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:0.875rem}
.breakdown-item .label{font-size:0.75rem;color:var(--text-muted);margin-bottom:0.25rem}
.breakdown-item .value{font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:700}
.breakdown-item .value.positive{color:var(--success)}
.breakdown-item .value.negative{color:var(--error)}
.costs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:0.75rem;margin-bottom:1.5rem}
.cost-card{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:0.875rem}
.cost-card .cost-label{font-size:0.75rem;color:var(--text-muted);margin-bottom:0.375rem}
.cost-card .cost-values{display:flex;justify-content:space-between;gap:0.5rem}
.cost-card .cost-val{font-family:'JetBrains Mono',monospace;font-size:0.875rem;font-weight:600}
.cost-card .source-val{color:var(--primary-light)}
.cost-card .target-val{color:var(--accent)}
.periods-table-wrap{overflow-x:auto;margin-bottom:1.5rem}
.periods-table{width:100%;border-collapse:collapse;font-size:0.875rem}
.periods-table th{text-align:left;padding:0.625rem 0.75rem;background:var(--bg-elevated);color:var(--text-secondary);font-weight:600;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em;border-bottom:1px solid var(--border)}
.periods-table td{padding:0.5rem 0.75rem;border-bottom:1px solid var(--border);font-family:'JetBrains Mono',monospace}
.saved-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.75rem}
.saved-list{display:flex;flex-direction:column;gap:0.375rem}
.saved-item{display:flex;justify-content:space-between;align-items:center;padding:0.625rem 0.75rem;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all var(--transition)}
.saved-item:hover{border-color:var(--primary)}
.saved-item .s-info{font-size:0.8125rem;font-weight:600}
.saved-item .s-meta{font-size:0.75rem;color:var(--text-muted)}
.hidden{display:none!important}
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--bg-card);border:1px solid var(--border-accent);border-radius:8px;padding:0.75rem 1.5rem;font-size:0.875rem;font-weight:500;box-shadow:0 8px 30px rgba(0,0,0,0.5);z-index:100;transition:transform 0.3s cubic-bezier(0.34,1.56,0.64,1);pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.hidden{display:block;transform:translateX(-50%) translateY(100px)}
.footer{margin-top:auto;padding-top:2rem;text-align:center;font-size:0.75rem;color:var(--text-muted)}
@media(max-width:768px){
  .converter-grid{grid-template-columns:1fr}
  .arrow-divider{transform:rotate(90deg)}
  .breakdown-grid{grid-template-columns:1fr 1fr}
  .costs-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .breakdown-grid,.costs-grid{grid-template-columns:1fr}
}