*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#7C3AED;--primary-dim:rgba(124,58,237,.12);
  --secondary:#A78BFA;--accent:#34D399;--accent-dim:rgba(52,211,153,.12);
  --bg:#0F0A1F;--surface:#1A1230;--surface2:#241A40;
  --border:rgba(124,58,237,.1);--text:#EDE9FE;--text-dim:#C4B5FD;
  --radius:12px;--font:'Inter',system-ui,sans-serif;--mono:'Fira Code',monospace;
  --transition:250ms ease;
}
html{font-size:16px;scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6;min-height:100vh}
.header{position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);background:rgba(15,10,31,.8);border-bottom:1px solid var(--border)}
.header-inner{max-width:800px;margin:0 auto;padding:.75rem 1.5rem;display:flex;align-items:center}
.logo{display:flex;align-items:center;gap:.5rem}
.logo-icon{font-size:1.25rem}
.logo h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn{display:inline-flex;align-items:center;gap:.3rem;padding:.45rem .85rem;border:none;border-radius:8px;font-size:.8rem;font-weight:600;cursor:pointer;transition:all var(--transition);font-family:var(--font)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff}
.btn-primary:hover{filter:brightness(1.15);transform:translateY(-1px)}
.btn-sm{background:var(--surface2);color:var(--text-dim);border:1px solid var(--border)}
.btn-sm:hover{border-color:var(--primary);color:var(--primary)}
.main{max-width:800px;margin:0 auto;padding:1.5rem}
.glass-card{background:rgba(26,18,48,.6);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.25rem}
.section-title{font-size:.9rem;font-weight:700;margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}
.section-title::before{content:'';width:4px;height:18px;background:linear-gradient(to bottom,var(--primary),var(--secondary));border-radius:2px}
.ctrl-row{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem;align-items:end}
.form-group{display:flex;flex-direction:column;gap:.3rem}
.form-group select,.form-group input{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:.5rem;color:var(--text);font-family:var(--font);font-size:.8rem;outline:none}
.form-group select:focus,.form-group input:focus{border-color:var(--primary)}
.ctrl-label{font-size:.7rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}
.badge{font-size:.65rem;background:var(--primary-dim);color:var(--primary);padding:.15rem .5rem;border-radius:8px;font-weight:700}
.output-area{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.75rem;font-family:var(--mono);font-size:.75rem;color:var(--accent);white-space:pre-wrap;max-height:400px;overflow-y:auto;margin-bottom:.75rem}
.actions-row{display:flex;gap:.5rem}
.val-input{width:100%;background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:.5rem;color:var(--text);font-family:var(--mono);font-size:.8rem;outline:none;margin-bottom:.5rem}
.val-input:focus{border-color:var(--primary)}
.val-result{font-size:.8rem;color:var(--text-dim);min-height:20px}
.val-result .valid{color:var(--accent);font-weight:700}
.val-result .invalid{color:#EF4444;font-weight:700}
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--surface2);color:var(--text);padding:.6rem 1.25rem;border-radius:var(--radius);font-size:.8rem;font-weight:500;border:1px solid var(--primary);box-shadow:0 8px 32px rgba(0,0,0,.4);transition:transform 300ms ease;z-index:9999;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}
@media(max-width:600px){.ctrl-row{grid-template-columns:1fr 1fr}.main{padding:1rem}}