:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg-light: #f8fafc;--bg-white: #ffffff;--glass-bg: rgba(255, 255, 255, .8);--glass-border: rgba(0, 0, 0, .05);--text-main: #1e293b;--text-muted: #64748b;--accent: #059669}*{margin:0;padding:0;box-sizing:border-box;font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background-color:var(--bg-light);color:var(--text-main);min-height:100vh;display:flex;justify-content:center;align-items:center;background-image:radial-gradient(circle at 10% 10%,rgba(79,70,229,.05) 0%,transparent 30%),radial-gradient(circle at 90% 90%,rgba(5,150,105,.03) 0%,transparent 30%);overflow-x:hidden}#root{width:100%;max-width:600px;padding:20px}.container{width:100%}.glass-card{background:var(--bg-white);border:1px solid var(--glass-border);border-radius:24px;padding:40px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}h1.title{font-size:2.5rem;font-weight:850;text-align:center;margin-bottom:8px;color:var(--text-main);letter-spacing:-.025em}.subtitle{text-align:center;color:var(--text-muted);margin-bottom:40px;font-size:1rem;font-weight:500}.loading-screen{display:flex;flex-direction:column;align-items:center;padding:2.5rem 0}.loading-spinner{animation:spin 1s linear infinite;color:var(--primary);margin-bottom:1rem}.loading-text{color:var(--text-muted)}.error-banner{display:flex;align-items:flex-start;gap:.75rem;background:#fef2f2;border:1px solid #fecaca;color:#dc2626;padding:1.25rem;border-radius:1rem;margin-bottom:1.5rem;font-size:.875rem}.error-banner-icon{margin-top:.125rem;flex-shrink:0}.error-banner-title{font-weight:700;margin-bottom:.25rem}.error-banner-message{opacity:.8}.error-banner-retry{margin-top:.75rem;font-size:.75rem;font-weight:700;text-decoration:underline;cursor:pointer;background:none;border:none;color:inherit}.upload-zone{border:2px dashed #cbd5e1;border-radius:24px;padding:48px 24px;text-align:center;transition:all .3s cubic-bezier(.4,0,.2,1);background:#f8fafc}.upload-zone.dragging{border-color:var(--primary);background:#eef2ff;border-style:solid}.upload-icon{width:48px;height:48px;color:var(--primary);margin:0 auto 16px}.upload-copy{margin-bottom:1rem}.upload-title{font-weight:700;font-size:1.125rem;color:var(--text-main)}.upload-subtitle{font-size:.75rem;color:var(--text-muted);margin-top:.25rem}.upload-btn{background:#fff;color:var(--primary);border:1px solid #e2e8f0;padding:10px 24px;border-radius:12px;font-weight:700;font-size:.95rem;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 6px -1px #0000000d}.upload-btn:hover{background:#f8fafc;border-color:#cbd5e1;transform:translateY(-1px)}.split-options{margin-top:2rem}.field-label{display:block;font-size:.875rem;font-weight:700;color:var(--text-muted);margin-bottom:.75rem}.segmented-control{display:flex;background:#ffffff80;padding:.25rem;border-radius:.75rem;margin-bottom:1.5rem;box-shadow:0 1px 2px #0000000d;border:1px solid rgba(255,255,255,.2)}.segmented-control-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.5rem .75rem;border-radius:.5rem;border:none;background:transparent;font-size:.875rem;font-weight:700;color:var(--text-muted);cursor:pointer;transition:all .2s ease}.segmented-control-btn.active{background:#fff;box-shadow:0 4px 6px -1px #0000001a;color:var(--primary)}.segmented-control-btn:hover:not(:disabled):not(.active){background:#fff6}.segmented-control-btn:disabled{opacity:.6;cursor:not-allowed}.info-badge{display:inline-flex;align-items:center;gap:.35rem;padding:.5rem .75rem;border-radius:999px;font-size:.75rem;font-weight:600}.info-badge-compatible{background:#22c55e14;color:#16a34a;border:1px solid rgba(34,197,94,.2);margin-bottom:1rem}.info-badge-fast{background:#eab30814;color:#ca8a04;border:1px solid rgba(234,179,8,.2);margin-bottom:1rem}.split-info-row{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;margin-bottom:1rem}.total-info,.part-info{background:#4f46e514;color:var(--text-main);border:1px solid rgba(79,70,229,.15)}.divider{margin:0 .25rem}.counter-section{display:flex;justify-content:center;margin:32px 0}.counter-container{display:flex;align-items:center;background:#f1f5f9;padding:8px;border-radius:20px;gap:16px;box-shadow:inset 0 2px 4px #0000000d}.counter-btn{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #e2e8f0;border-radius:16px;color:var(--primary);cursor:pointer;transition:all .2s ease;box-shadow:0 4px 6px -1px #0000001a}.counter-btn:hover:not(:disabled){background:var(--primary);color:#fff;transform:translateY(-2px)}.counter-btn:disabled{opacity:.5;cursor:not-allowed;background:#f8fafc;color:#cbd5e1}.counter-value{display:flex;align-items:baseline;gap:4px;min-width:100px;justify-content:center}.counter-value .number{font-size:2.5rem;font-weight:850;color:var(--text-main);font-variant-numeric:tabular-nums}.counter-value .unit{font-size:1.1rem;font-weight:700;color:var(--text-muted)}.split-btn{width:100%;padding:16px;border-radius:16px;background:linear-gradient(45deg,var(--primary),#6366f1);border:none;color:#fff;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all .3s ease;display:flex;justify-content:center;align-items:center;gap:8px}.split-btn-spaced{margin-top:1.5rem}.split-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 10px 15px -3px #4f46e54d}.split-btn:disabled{opacity:.5;background:#cbd5e1;cursor:not-allowed}.progress-container{margin-top:32px}.progress-bar{height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .3s ease}.status-text{font-size:.9rem;color:var(--text-muted);margin-bottom:8px;text-align:center;font-weight:600}.result-panel{margin-top:2rem}.result-heading{display:flex;align-items:center;justify-content:center;gap:.5rem;color:var(--accent);margin-bottom:1.5rem;font-weight:700;font-size:1.125rem}.result-list{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.result-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#f8fafc;border-radius:12px;border:1px solid #e2e8f0}.result-name{flex:1;margin-right:1rem;font-weight:500;font-size:.875rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.result-download{display:inline-flex;align-items:center;gap:.25rem;background:var(--primary);color:#fff;padding:.375rem .75rem;border-radius:.5rem;font-size:.75rem;font-weight:700;text-decoration:none;transition:background .2s ease}.result-download:hover{background:var(--primary-hover)}.reset-btn{width:100%;margin-top:1rem;background:none;border:none;color:var(--text-muted);font-size:.875rem;font-weight:500;cursor:pointer;transition:color .2s ease}.reset-btn:hover{color:var(--primary)}.faq-wrapper{margin-top:3rem;max-width:42rem;margin-left:auto;margin-right:auto;display:flex;flex-direction:column;gap:2rem;text-align:left}.faq-card{background:#fff6;padding:1.5rem;border-radius:1rem;border:1px solid rgba(255,255,255,.2);box-shadow:0 1px 2px #0000000d;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.faq-title{display:flex;align-items:center;gap:.5rem;font-size:1.25rem;font-weight:700;color:var(--text-main);margin-bottom:1rem}.faq-title svg{color:var(--primary)}.faq-text,.faq-answer{color:var(--text-muted);font-size:.875rem;line-height:1.6}.faq-text+.faq-text{margin-top:1rem}.faq-list{display:flex;flex-direction:column;gap:1rem}.faq-question{font-weight:700;color:var(--text-main);font-size:.875rem}.faq-answer{margin-top:.25rem}.app-footer{margin-top:2.5rem;text-align:center;font-size:.875rem;color:var(--text-muted);padding-bottom:2rem;max-width:42rem;margin-left:auto;margin-right:auto}.footer-badge{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:.75rem;background:#ffffff80;padding:.5rem 1rem;border-radius:999px;border:1px solid rgba(255,255,255,.2);box-shadow:0 1px 2px #0000000d;font-weight:600;color:var(--text-main)}.footer-badge-icon{color:#16a34a}.footer-copy{margin-bottom:.5rem}.footer-copy strong{display:inline-flex;align-items:center;gap:.25rem;color:var(--text-main);font-weight:700}.footer-note{font-size:.75rem;opacity:.7}.footer-break{display:none}.font-black{font-weight:900}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media(min-width:640px){.footer-break{display:block}}@media(max-width:480px){#root{padding:10px}.glass-card{padding:20px 16px}h1.title{font-size:1.8rem}.subtitle{font-size:.9rem;margin-bottom:24px}.upload-zone{padding:32px 16px}.info-badge{width:100%;justify-content:center}.counter-value .number{font-size:2rem}}
