*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#D946EF;--primary-dim:rgba(217,70,239,.12);
  --secondary:#E879F9;--accent:#10B981;--accent-dim:rgba(16,185,129,.12);
  --bg:#1A0A1A;--surface:#261026;--surface2:#331833;
  --border:rgba(217,70,239,.1);--text:#FAF5FF;--text-dim:#E879F9;
  --radius:12px;--font:'Inter',system-ui,sans-serif;
  --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(26,10,26,.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(38,16,38,.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}
.upload-area{cursor:pointer;text-align:center;padding:3rem 1.5rem;border:2px dashed var(--border);transition:border-color var(--transition)}
.upload-area:hover{border-color:var(--primary)}
.upload-icon{font-size:2.5rem;margin-bottom:.5rem;display:block}
.upload-hint{font-size:.7rem;color:var(--text-dim)}
.ctrl-row{display:grid;grid-template-columns:1fr 1fr auto;gap:.75rem;align-items:end}
.form-group{display:flex;flex-direction:column;gap:.3rem}
.form-group select{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}
.ctrl-label{font-size:.7rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}
.ctrl-label span{color:var(--primary);font-weight:700}
input[type="range"]{-webkit-appearance:none;appearance:none;width:100%;height:4px;background:var(--surface2);border-radius:4px;outline:none}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--primary);cursor:pointer}
.badge{font-size:.65rem;background:var(--primary-dim);color:var(--primary);padding:.15rem .5rem;border-radius:8px;font-weight:700}
.result-item{display:flex;justify-content:space-between;align-items:center;background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:.5rem .75rem;margin-bottom:.3rem;font-size:.8rem;gap:.5rem}
.ri-name{color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.ri-sizes{display:flex;gap:.5rem;font-size:.7rem;align-items:center}
.ri-original{color:var(--text-dim)}
.ri-arrow{color:var(--text-dim)}
.ri-converted{color:var(--accent);font-weight:700}
.ri-ratio{color:var(--primary);font-weight:700;font-size:.65rem}
.ri-dl{background:none;border:none;cursor:pointer;font-size:.85rem}
.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}.main{padding:1rem}}