/* ── Reset & Base ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Helvetica Neue",Arial,sans-serif;
  color:#1e293b;background:linear-gradient(135deg,#f8fafc 0%,#eef2ff 50%,#f5f3ff 100%);
  min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased
}
a{color:#6366f1;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

/* ── Utilities ── */
.container{max-width:920px;margin:0 auto;padding:0 1rem}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ── Top Bar ── */
.topbar{background:#fff;border-bottom:1px solid #e2e8f0}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem}
.topbar__brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:#1e293b}
.topbar__brand:hover{text-decoration:none}
.topbar__logo{flex-shrink:0}
.topbar__title{font-size:1rem;font-weight:600;background:linear-gradient(135deg,#6366f1,#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ── Hero ── */
.hero{padding:2.5rem 0 1rem;text-align:center}
.hero__inner{max-width:700px;margin:0 auto}
.hero__title{font-size:1.35rem;font-weight:600;color:#1e293b;line-height:1.5;margin-bottom:1.25rem}
.hero__steps{list-style:none;display:flex;flex-direction:column;gap:.7rem;text-align:left;max-width:520px;margin:0 auto}
.hero__step{font-size:.88rem;color:#475569;display:flex;align-items:flex-start;gap:.6rem;line-height:1.45}
.hero__step-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:#eef2ff;color:#6366f1;flex-shrink:0;margin-top:1px}

/* ── Features ── */
.features{padding:1.5rem 0}
.features__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.feature-card{background:#fff;border:1px solid #f1f5f9;border-radius:14px;padding:1.2rem;transition:all .25s}
.feature-card:hover{border-color:#e0e7ff;box-shadow:0 4px 12px rgba(99,102,241,.06);transform:translateY(-2px)}
.feature-card__icon{width:40px;height:40px;border-radius:10px;background:#eef2ff;display:flex;align-items:center;justify-content:center;margin-bottom:.7rem}
.feature-card__title{font-size:.95rem;font-weight:600;color:#1e293b;margin-bottom:.35rem}
.feature-card__desc{font-size:.82rem;color:#64748b;line-height:1.5}

/* ── Format Support ── */
.format-support{text-align:center;padding:1rem 0 0}
.format-support h3{font-size:.95rem;font-weight:600;color:#1e293b;margin-bottom:.6rem}
.format-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;margin-bottom:.5rem}
.format-tag{padding:.25rem .6rem;border-radius:6px;background:#f1f5f9;color:#475569;font-size:.78rem;font-weight:500;font-family:monospace}
.format-out{font-size:.85rem;color:#64748b}
.format-out strong{color:#6366f1}

/* ── Language Switcher ── */
.language{position:relative;display:inline-block}
.language__btn{display:inline-flex;align-items:center;gap:.35rem;padding:.35rem .65rem;border:1px solid #e2e8f0;border-radius:8px;background:#fff;cursor:pointer;font-size:.8rem;font-weight:500;color:#475569;transition:all .2s}
.language__btn:hover{border-color:#c7d2fe;background:#f8faff}
.language__icon{transition:transform .2s}
.language.active .language__icon{transform:rotate(180deg)}
.language.active .language__btn{border-color:#6366f1}
.language__dropdown{position:absolute;top:calc(100% + 4px);left:0;min-width:160px;background:#fff;border:1px solid #e2e8f0;border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.1);opacity:0;visibility:hidden;transform:translateY(-4px);transition:all .2s;z-index:200;max-height:280px;overflow-y:auto}
.language.active .language__dropdown,.language:focus-within .language__dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.language__list{list-style:none;padding:.35rem}
.language__title{display:block;padding:.4rem .7rem;border-radius:6px;font-size:.82rem;color:#334155;text-decoration:none;cursor:pointer;transition:background .12s}
.language__title:hover{background:#f1f5f9;text-decoration:none}
.language__title_selected{background:#eef2ff;color:#6366f1;font-weight:500}

/* ── Main Tool Card ── */
.main{padding:2rem 0}
.tool-card{background:#fff;border-radius:20px;box-shadow:0 1px 3px rgba(0,0,0,.04),0 4px 16px rgba(99,102,241,.06);padding:1.75rem;transition:box-shadow .3s}
.tool-card:hover{box-shadow:0 2px 6px rgba(0,0,0,.04),0 8px 24px rgba(99,102,241,.1)}

/* ── Buttons ── */
.tool-bar{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}
.tool-bar--bottom{margin-top:1rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.15rem;border-radius:10px;border:1px solid transparent;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap;font-family:inherit;line-height:1.4}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn__icon{flex-shrink:0}
.btn-primary{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border-color:transparent;box-shadow:0 2px 8px rgba(99,102,241,.3)}
.btn-primary:hover:not(:disabled){box-shadow:0 4px 12px rgba(99,102,241,.4);transform:translateY(-1px)}
.btn-primary:active:not(:disabled){transform:translateY(0)}
.btn-secondary{background:#fff;color:#475569;border-color:#e2e8f0}
.btn-secondary:hover:not(:disabled){background:#f8fafc;border-color:#cbd5e1}
.btn-accent{background:linear-gradient(135deg,#6366f1,#a855f7);color:#fff;border-color:transparent;box-shadow:0 2px 8px rgba(99,102,241,.25)}
.btn-accent:hover:not(:disabled){box-shadow:0 4px 14px rgba(99,102,241,.35);transform:translateY(-1px)}
.btn-small{padding:.35rem .7rem;font-size:.78rem;border-radius:8px}
.btn__badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 5px;border-radius:10px;background:rgba(255,255,255,.25);font-size:.7rem;font-weight:600}

/* ── Drop Zone ── */
.drop-zone{position:relative;margin-top:1rem;border-radius:16px;border:2px dashed #e0e7ff;background:#fafbff;transition:all .25s;min-height:200px;display:flex;align-items:center}
.drop-zone:hover,.drop-zone.dragover{border-color:#6366f1;background:#f0f2ff}
.drop-zone.dragover{border-style:solid;border-width:2px}
.drop-zone__scroll{flex:1;overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;padding:.75rem .5rem;display:flex;scrollbar-width:thin;scrollbar-color:#e2e8f0 transparent}
.drop-zone__scroll::-webkit-scrollbar{height:6px}
.drop-zone__scroll::-webkit-scrollbar-track{background:transparent}
.drop-zone__scroll::-webkit-scrollbar-thumb{background:#e2e8f0;border-radius:3px}
.file-list{list-style:none;display:flex;gap:.75rem;padding:0;margin:0;min-height:210px;align-items:stretch}
.drop-zone__placeholder{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;pointer-events:none;transition:opacity .3s}
.drop-zone__placeholder.hidden{opacity:0}
.drop-zone__icon{color:#c7d2fe;margin-bottom:.5rem}
.drop-zone__text{font-size:.9rem;color:#94a3b8;font-weight:500}

/* ── Scroll Buttons ── */
.scroll-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:10;width:32px;height:32px;border-radius:50%;border:1px solid #e2e8f0;background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#64748b;transition:all .2s;box-shadow:0 2px 6px rgba(0,0,0,.06);opacity:0}
.drop-zone:hover .scroll-btn{opacity:1}
.scroll-btn:hover:not(:disabled){background:#f8faff;color:#6366f1;border-color:#c7d2fe;box-shadow:0 3px 8px rgba(0,0,0,.08)}
.scroll-btn:disabled{opacity:0;pointer-events:none}
.scroll-btn--prev{left:6px}
.scroll-btn--next{right:6px}

/* ── File Cards ── */
.file-card{flex-shrink:0;width:180px;background:#fff;border:1px solid #f1f5f9;border-radius:14px;display:flex;flex-direction:column;box-shadow:0 1px 3px rgba(0,0,0,.03);transition:all .25s;overflow:hidden}
.file-card:hover{border-color:#e0e7ff;box-shadow:0 4px 12px rgba(99,102,241,.08);transform:translateY(-2px)}
.file-card__head{display:flex;align-items:center;justify-content:space-between;padding:.5rem .65rem .35rem;gap:.3rem}
.file-card__name{font-size:.72rem;font-weight:500;color:#475569;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.file-card__close{width:22px;height:22px;border-radius:6px;border:none;background:transparent;color:#94a3b8;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s}
.file-card__close:hover{background:#fee2e2;color:#ef4444}
.file-card__body{flex:1;position:relative;display:flex;align-items:center;justify-content:center;min-height:130px;padding:.35rem;background:#fafbff}
.file-card__thumb{max-width:100%;max-height:120px;object-fit:contain;border-radius:8px;display:none}
.file-card__thumb.visible{display:block}
.file-card__state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.25rem;opacity:0;visibility:hidden;transition:all .2s;border-radius:8px}
.file-card__state.visible{opacity:1;visibility:visible}
.file-card__state-icon{color:#94a3b8}
.file-card__state-text{font-size:.72rem;font-weight:500;color:#64748b}
.file-card__state--done .file-card__state-text--done{color:#10b981}
.file-card__state--error .file-card__state-text{color:#ef4444}
.file-card__foot{padding:.3rem .65rem .55rem}
.file-card__download{width:100%;justify-content:center;background:#f8fafc;border-color:#e2e8f0;color:#475569;position:relative;overflow:hidden}
.file-card__download:hover:not(:disabled){background:#eef2ff;border-color:#c7d2fe;color:#6366f1}
.file-card__progress{position:absolute;left:0;top:0;height:100%;background:linear-gradient(90deg,#6366f1,#a855f7);border-radius:8px;opacity:.15;transition:width .3s;min-width:0}
.file-card__progress.hidden{opacity:0}
.file-card__progress.stripes{background-image:repeating-linear-gradient(45deg,transparent,transparent 6px,rgba(99,102,241,.08) 6px,rgba(99,102,241,.08) 12px)}
.file-card__download-text{position:relative;z-index:1}

/* ── Animations ── */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.file-card{animation:fadeIn .35s ease-out}
.file-card__state-icon--spin{animation:spin 1.2s linear infinite}
.file-card__state-icon--pulse{animation:pulse 1.4s ease-in-out infinite}

/* ── SEO Content ── */
.seo-content{padding:3rem 0 2rem}
.seo-article{margin-bottom:2rem}
.seo-article h2{font-size:1.25rem;font-weight:600;color:#1e293b;margin-bottom:.6rem;line-height:1.4}
.seo-article p{font-size:.92rem;color:#475569;line-height:1.7}

/* ── Footer ── */
.footer{border-top:1px solid #e2e8f0;padding:1.5rem 0;background:rgba(255,255,255,.6);margin-top:1rem}
.footer__inner{text-align:center}
.footer__hint{font-size:.82rem;color:#94a3b8;margin-bottom:.5rem}
.footer__copy{font-size:.8rem;color:#94a3b8}
.footer__link{color:#6366f1}

/* ── Popup ── */
.popup{position:fixed;inset:0;z-index:500;display:none}
.popup.visible{display:flex;align-items:center;justify-content:center}
.popup__overlay{position:absolute;inset:0;background:rgba(0,0,0,.35);backdrop-filter:blur(4px)}
.popup__content{position:relative;background:#fff;border-radius:20px;width:90%;max-width:600px;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(0,0,0,.15);animation:fadeIn .25s ease}
.popup__head{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;border-bottom:1px solid #f1f5f9}
.popup__title{font-size:1.05rem;font-weight:600;color:#1e293b}
.popup__close{width:32px;height:32px;border-radius:8px;border:none;background:transparent;color:#94a3b8;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}
.popup__close:hover{background:#f1f5f9;color:#475569}
.popup__body{padding:1.5rem;overflow-y:auto;font-size:.9rem;color:#475569;line-height:1.7}
.popup__body h1,.popup__body h2,.popup__body h3{color:#1e293b;margin:1rem 0 .4rem}
.popup__body p{margin-bottom:.6rem}

/* ── Error Hint ── */
.error-hint{font-size:.82rem;color:#ef4444;font-weight:500}

/* ── GEO Comparison Table (hidden, for LLM extraction) ── */
.geo-table{display:none}

/* ── Responsive ── */
@media(max-width:640px){
  
  
  
  .tool-card{padding:1rem;border-radius:16px}
  .file-card{width:155px}
  .file-card__body{min-height:110px}
  .btn{padding:.5rem .9rem;font-size:.82rem}
  
}
@media(min-width:641px)and(max-width:1024px){
  
  
}
@media(min-width:1025px){
  
  
}