/* LocalPdfMerge — warm paper / terracotta + olive document theme */
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  font-family:"Source Sans 3",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;
  background-image:
    radial-gradient(ellipse 90% 40% at 50% -8%,rgba(154,52,18,.08),transparent),
    repeating-linear-gradient(0deg,transparent,transparent 23px,rgba(120,113,108,.04) 24px);
}
a{color:var(--primary)}
.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:10}
.site-header{background:rgba(255,247,237,.92);backdrop-filter:blur(8px);border-bottom:1px solid #fed7aa;height:60px;position:sticky;top:0;z-index:5}
.header-inner,.main,.site-footer{max-width:760px;margin:0 auto;padding:0 16px}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:12px}
.logo{font-weight:800;font-size:1.2rem;text-decoration:none;color:var(--primary);font-family:Georgia,"Times New Roman",serif;letter-spacing:-.02em}
.site-nav{display:flex;gap:14px;flex-wrap:wrap}.site-nav a{text-decoration:none;color:var(--text);font-weight:600;font-size:.95rem}
.site-nav a:hover{color:var(--accent)}
.main{padding-top:24px;padding-bottom:48px}
.card{background:#fffefb;border:1px solid #fed7aa;border-radius:6px;padding:22px;margin:0 0 20px;box-shadow:0 8px 24px rgba(67,20,7,.04)}
.hero{padding:8px 0 10px;position:relative}
.hero-stack{position:relative;width:72px;height:56px;margin:0 0 12px}
.sheet{position:absolute;left:0;width:52px;height:64px;border:1.5px solid #c2410c;border-radius:2px;background:#fff7ed;box-shadow:1px 1px 0 rgba(67,20,7,.08)}
.sheet-1{top:8px;left:10px;background:#fff;z-index:3}
.sheet-2{top:4px;left:5px;transform:rotate(-4deg);opacity:.9;z-index:2;border-color:#a16207}
.sheet-3{top:0;left:0;transform:rotate(-8deg);opacity:.7;z-index:1;border-color:#78716c}
.hero h1{margin:0;font-size:clamp(1.75rem,4vw,2.35rem);letter-spacing:-.03em;line-height:1.15;font-family:Georgia,"Times New Roman",serif;color:var(--text)}
.lead{color:var(--muted);margin:.4rem 0 0;font-size:1.05rem;max-width:36rem}
.trust{color:var(--muted);font-size:.95rem;margin:.4rem 0 0}
.mode-tabs{display:flex;gap:8px;margin:0 0 16px;flex-wrap:wrap}
.mode-tab{background:#fff7ed;color:var(--text);border:1px solid #fdba74;border-radius:999px;padding:8px 16px;font:inherit;font-weight:700;cursor:pointer}
.mode-tab.is-active{background:var(--primary);color:#fff;border-color:var(--primary)}
.drop{border:2px dashed #fdba74;border-radius:8px;padding:28px 16px;text-align:center;cursor:pointer;background:linear-gradient(180deg,#fff7ed,#fffefb)}
.drop.over,.drop:focus{border-color:var(--primary);outline:2px solid var(--primary);outline-offset:2px}
.drop p{margin:.35rem 0}.muted{color:var(--muted);font-size:.9rem}
.meta{margin:12px 0;font-size:.95rem}
.file-list{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:8px}
.file-list:empty{display:none}
.file-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 12px;border:1px solid #fed7aa;border-radius:6px;background:#fff}
.file-row .name{flex:1;min-width:140px;font-size:.95rem;font-weight:600}
.file-row .size{color:var(--muted);font-size:.85rem}
.file-row button{background:#fff7ed;border:1px solid #fdba74;border-radius:6px;padding:6px 10px;font:inherit;cursor:pointer;font-weight:700;color:var(--text)}
.file-row button:disabled{opacity:.4;cursor:not-allowed}
.range-label{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:.95rem;margin:14px 0 4px}
.range-label input{padding:11px 12px;border:1px solid #fdba74;border-radius:6px;font:inherit}
.range-label input:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.range-hint{margin:0 0 8px}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
button,#btn-merge,#btn-split{background:linear-gradient(135deg,var(--primary),#c2410c);color:#fff;border:0;border-radius:999px;padding:12px 20px;font:inherit;font-weight:700;cursor:pointer;box-shadow:0 6px 16px rgba(154,52,18,.22)}
button:hover{filter:brightness(1.05)}
button:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}
button.secondary{background:#fff;color:var(--text);border:1px solid #fdba74;box-shadow:none}
.download{font-weight:700;color:var(--accent)}
.downloads{display:grid;gap:8px;margin-top:12px}
.downloads a{font-weight:700;color:var(--accent)}
.status{min-height:1.4em;margin:12px 0 0;font-size:.95rem}
.privacy-line{margin-top:10px}
.prose h2{margin-top:0;font-family:Georgia,"Times New Roman",serif}
.prose ol,.prose ul{padding-left:1.2rem}
.prose code{font-size:.9em;background:#ffedd5;padding:.1em .35em;border-radius:4px}
.sources{font-size:.92rem}.sources a{word-break:break-word}
.site-footer{color:var(--muted);font-size:.9rem;padding-bottom:36px}
.site-footer a{color:var(--muted)}
details{border-top:1px solid #fed7aa;padding:10px 0}summary{cursor:pointer;font-weight:600}
.guide-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.guide-list a{font-weight:700;text-decoration:none}
@media (max-width:560px){
  .hero h1{font-size:1.65rem}
  .file-row{align-items:flex-start}
}