@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6366F1;--primary-glow:rgba(99,102,241,.25);
  --green:#22C55E;--red:#EF4444;--orange:#F97316;
  --bg:#0B0D14;--bg2:#151823;--bg-card:rgba(21,24,35,.75);
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;
  --border:rgba(148,163,184,.1);--radius:16px;--radius-sm:10px;
  --font:'Inter',system-ui,sans-serif;--tr:.25s cubic-bezier(.4,0,.2,1);
}
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 40% 0%,rgba(99,102,241,.08) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:960px;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:68px;height:68px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),#EC4899);font-size:34px;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));-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:460px;margin:8px auto 0}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;backdrop-filter:blur(16px);margin-bottom:20px}

/* Controls */
.controls-row{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-end}
.control-group{display:flex;flex-direction:column;gap:6px;min-width:140px}
.control-group label{font-size:.78rem;font-weight:600;color:var(--text2)}
.select,.input{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}
.select:focus,.input:focus{border-color:var(--primary)}
.slider{-webkit-appearance:none;appearance:none;width:100%;height:6px;background:var(--bg);border-radius:3px;outline:none}
.slider::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--primary);cursor:pointer;box-shadow:0 2px 8px var(--primary-glow)}

/* Drop zone */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:var(--tr);background:var(--bg-card);backdrop-filter:blur(16px);margin-bottom:20px;animation:border-pulse 3s ease-in-out infinite}
@keyframes border-pulse{0%,100%{border-color:rgba(148,163,184,.1)}50%{border-color:rgba(99,102,241,.3)}}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--primary);background:rgba(99,102,241,.06);box-shadow:0 0 40px rgba(99,102,241,.08);animation:none}
.drop-zone__icon{font-size:2.5rem;margin-bottom:12px}
.drop-zone__text{font-size:1rem;color:var(--text2);margin-bottom:6px}
.drop-zone__hint{font-size:.82rem;color:var(--text3)}

/* Buttons */
.btn{padding:10px 20px;font-family:var(--font);font-size:.85rem;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#4F46E5}
.btn-green{background:var(--green);color:#fff}.btn-green:hover{background:#16A34A}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--red);color:var(--red)}

/* Batch bar */
.batch-bar{display:flex;gap:10px;align-items:center;margin-bottom:20px;flex-wrap:wrap}
.batch-info{font-size:.88rem;color:var(--text2);flex:1}

/* Results */
.results{display:flex;flex-direction:column;gap:14px}
.file-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;backdrop-filter:blur(16px);transition:var(--tr)}
.file-item:hover{box-shadow:0 4px 20px rgba(0,0,0,.3)}
.file-item__header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.file-item__name{font-weight:600;font-size:.9rem;word-break:break-all}
.file-item__meta{font-size:.78rem;color:var(--text3);white-space:nowrap}
.file-item__progress{height:4px;background:rgba(148,163,184,.1);border-radius:2px;overflow:hidden;margin-bottom:10px}
.file-item__bar{height:100%;background:linear-gradient(90deg,var(--primary),var(--green));border-radius:2px;transition:width .4s ease;width:0%}
.file-item__result{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.file-item__sizes{font-size:.82rem;color:var(--text2)}
.file-item__sizes .saved{color:var(--green);font-weight:700}
.file-item__sizes .bigger{color:var(--red);font-weight:700}
.file-item__actions{display:flex;gap:6px}
.file-item__actions .btn{padding:6px 14px;font-size:.8rem}

/* Preview */
.preview-overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);display:none;align-items:center;justify-content:center;z-index:1000;padding:20px;backdrop-filter:blur(4px)}
.preview-overlay.visible{display:flex}
.preview-modal{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;max-width:900px;width:100%;max-height:90vh;overflow-y:auto;position:relative}
.preview-close{position:absolute;top:12px;right:16px;background:none;border:none;color:var(--text2);font-size:1.5rem;cursor:pointer}
.preview-title{font-size:1rem;font-weight:700;margin-bottom:16px}
.preview-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.preview-side{text-align:center}
.preview-label{font-size:.78rem;font-weight:700;color:var(--text3);text-transform:uppercase;margin-bottom:8px}
.preview-side img{max-width:100%;max-height:300px;border-radius:var(--radius-sm);border:1px solid var(--border)}
.preview-size{font-size:.82rem;color:var(--text2);margin-top:8px}

/* 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:1001;opacity:0;transition:all .3s ease;pointer-events:none}
.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:640px){
  .controls-row{flex-direction:column}
  .preview-compare{grid-template-columns:1fr}
  .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)}