/* ============================================================
   Sheaf — PDF Workbench
   Design system + components
   ============================================================ */

:root{
  /* surfaces */
  --paper:#EBEAE4;
  --paper-2:#E4E3DC;
  --white:#FFFFFF;
  --line:#D8D7CF;
  --line-soft:#E4E3DC;

  /* ink */
  --ink:#1C1D19;
  --ink-soft:#54564E;
  --ink-faint:#8B8D82;

  /* category accents (muted gouache set) */
  --c-organize:#C2603F;
  --c-optimize:#6E8B3D;
  --c-convertto:#C2943A;
  --c-convertfrom:#3F8A86;
  --c-edit:#8A5A8C;
  --c-security:#3E6CA6;
  --c-intel:#7A6BC4;

  --accent:#C2603F;        /* primary brand action */
  --accent-ink:#7d3b25;

  /* type */
  --font-display:'Fraunces',Georgia,serif;
  --font-body:'Inter',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',monospace;

  /* shape */
  --r:14px;
  --r-sm:9px;
  --shadow:0 1px 2px rgba(28,29,25,.04), 0 8px 26px -16px rgba(28,29,25,.28);
  --shadow-lg:0 24px 60px -30px rgba(28,29,25,.45);

  --maxw:1240px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* paper-grain texture, very subtle */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(rgba(28,29,25,.018) 1px, transparent 1px);
  background-size:4px 4px;
}
.wrap, header, footer, main{position:relative;z-index:1}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-faint);
}

/* ============================================================
   Top nav
   ============================================================ */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(235,234,228,.82);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav__inner{display:flex;align-items:center;gap:24px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);
  font-weight:600;font-size:22px;letter-spacing:-.01em}
.brand__mark{width:30px;height:30px;flex:none}
.nav__links{display:flex;gap:26px;margin-left:8px}
.nav__links a{font-size:14px;color:var(--ink-soft)}
.nav__links a:hover{color:var(--ink)}
.nav__spacer{flex:1}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:500;
  padding:10px 18px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:.18s ease;
}
.btn--primary{background:var(--ink);color:#F5F3EC}
.btn--primary:hover{background:#2c2e27;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn--ghost:hover{background:var(--white);border-color:var(--ink-faint)}
.nav__toggle{display:none}

/* ============================================================
   Hero
   ============================================================ */
.hero{padding:68px 0 30px;position:relative;overflow:hidden}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{
  font-family:var(--font-display);
  font-weight:500;
  font-size:clamp(40px,6vw,68px);
  line-height:1.02;letter-spacing:-.02em;margin:18px 0 0;
}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero p.lede{font-size:18px;color:var(--ink-soft);max-width:46ch;margin:20px 0 28px}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero__note{font-size:13px;color:var(--ink-faint);margin-top:18px;display:flex;align-items:center;gap:8px}
.hero__note svg{width:15px;height:15px;color:var(--c-optimize)}

/* fanned page stack visual */
.fan{position:relative;height:300px}
.fan__sheet{
  position:absolute;left:50%;top:50%;width:178px;height:230px;
  background:var(--white);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);transform-origin:bottom center;
  display:flex;flex-direction:column;gap:9px;padding:20px 18px;
}
.fan__sheet .ln{height:7px;border-radius:4px;background:var(--paper-2)}
.fan__sheet .ln.s{width:60%}
.fan__sheet .ln.accent{background:color-mix(in srgb,var(--accent) 38%,var(--paper-2))}
.fan__sheet:nth-child(1){transform:translate(-50%,-50%) rotate(-13deg) translateY(6px);opacity:.85}
.fan__sheet:nth-child(2){transform:translate(-50%,-50%) rotate(-4deg)}
.fan__sheet:nth-child(3){transform:translate(-50%,-50%) rotate(7deg) translateY(-4px)}
@media (prefers-reduced-motion:no-preference){
  .fan__sheet{animation:rise .9s cubic-bezier(.2,.8,.2,1) both}
  .fan__sheet:nth-child(1){animation-delay:.05s}
  .fan__sheet:nth-child(2){animation-delay:.16s}
  .fan__sheet:nth-child(3){animation-delay:.27s}
}
@keyframes rise{from{opacity:0;transform:translate(-50%,-30%) rotate(0) }}

/* ---------- search ---------- */
.search{margin:42px 0 8px;position:relative;max-width:560px}
.search input{
  width:100%;padding:15px 16px 15px 46px;font-size:15px;font-family:inherit;
  border:1px solid var(--line);border-radius:12px;background:var(--white);color:var(--ink);
  box-shadow:var(--shadow);
}
.search input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;color:var(--ink-faint)}
.search__count{margin-top:10px;font-family:var(--font-mono);font-size:12px;color:var(--ink-faint)}

/* ============================================================
   Tools grid — folder cards
   ============================================================ */
.tools{padding:26px 0 70px}
.grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:42px 32px;
  align-items:start;
}
.cat{
  position:relative;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:0 var(--r) var(--r) var(--r);
  padding:22px 20px 12px;
  margin-top:30px;
  box-shadow:var(--shadow);
  transition:.2s ease;
}
.cat:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.cat__tab{
  position:absolute;top:-29px;left:-1px;height:30px;
  display:flex;align-items:center;padding:0 16px;
  border-radius:10px 12px 0 0;
  background:var(--cat,#888);color:#fff;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  box-shadow:0 -2px 6px -4px rgba(0,0,0,.3);
}
.cat__tab::after{ /* little fold accent */
  content:"";position:absolute;right:-9px;bottom:0;width:10px;height:30px;
  background:var(--cat,#888);
  clip-path:polygon(0 0,100% 100%,0 100%);
  border-radius:0 0 0 2px;opacity:.85;
}
.tool{
  display:flex;align-items:center;gap:13px;
  padding:9px 10px;border-radius:var(--r-sm);
  color:var(--ink);transition:.14s ease;
}
.tool:hover{background:color-mix(in srgb,var(--cat) 9%,var(--white))}
.tool:focus-visible{outline:2px solid var(--cat);outline-offset:1px}
.tool__ic{
  width:34px;height:34px;flex:none;border-radius:9px;
  display:grid;place-items:center;
  background:color-mix(in srgb,var(--cat) 14%,var(--white));
  color:var(--cat);
}
.tool__ic svg{width:19px;height:19px}
.tool__name{font-size:14.5px;font-weight:500}
.tool__name small{display:block;font-weight:400;font-size:11.5px;color:var(--ink-faint);
  letter-spacing:0}
.tool .badge{margin-left:auto;font-family:var(--font-mono);font-size:9.5px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);
  border:1px solid var(--line);border-radius:5px;padding:2px 6px}
.tool .badge.live{color:var(--c-optimize);border-color:color-mix(in srgb,var(--c-optimize) 40%,var(--line))}

/* assign accents */
.cat.organize{--cat:var(--c-organize)}
.cat.optimize{--cat:var(--c-optimize)}
.cat.convertto{--cat:var(--c-convertto)}
.cat.convertfrom{--cat:var(--c-convertfrom)}
.cat.edit{--cat:var(--c-edit)}
.cat.security{--cat:var(--c-security)}
.cat.intel{--cat:var(--c-intel)}

.cat.hide{display:none}
.tool.hide{display:none}

/* ============================================================
   Trust strip
   ============================================================ */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--paper-2)}
.strip__inner{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:40px 0}
.feat{display:flex;gap:14px;align-items:flex-start}
.feat__ic{width:38px;height:38px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:var(--white);border:1px solid var(--line);color:var(--ink)}
.feat__ic svg{width:20px;height:20px}
.feat h3{margin:2px 0 4px;font-size:15px;font-family:var(--font-display);font-weight:600}
.feat p{margin:0;font-size:13.5px;color:var(--ink-soft);line-height:1.45}

/* ============================================================
   Footer
   ============================================================ */
footer{background:var(--ink);color:#D9D7CD;padding:54px 0 30px}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot .brand{color:#F4F1E8}
.foot p{font-size:13.5px;color:#A6A89C;max-width:34ch;margin:14px 0 0}
.foot h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:#83857a;margin:0 0 14px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.foot ul a{font-size:13.5px;color:#C9C7BD}
.foot ul a:hover{color:#fff}
.foot__bottom{display:flex;justify-content:space-between;align-items:center;
  margin-top:42px;padding-top:22px;border-top:1px solid #34362f;
  font-size:12.5px;color:#83857a;flex-wrap:wrap;gap:10px}

/* ============================================================
   Tool runner page (tool.html)
   ============================================================ */
.run{padding:40px 0 80px;min-height:60vh}
.crumbs{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);margin-bottom:18px}
.crumbs a:hover{color:var(--ink)}
.run__head{max-width:720px;margin-bottom:26px}
.run__head .run__ic{width:54px;height:54px;border-radius:13px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--cat,var(--accent)) 14%,var(--white));color:var(--cat,var(--accent));
  border:1px solid color-mix(in srgb,var(--cat,var(--accent)) 30%,var(--line));margin-bottom:16px}
.run__ic svg{width:28px;height:28px}
.run h1{font-family:var(--font-display);font-weight:500;font-size:clamp(28px,4vw,40px);
  letter-spacing:-.02em;margin:0}
.run__head p{color:var(--ink-soft);font-size:16px;margin:10px 0 0;max-width:60ch}

.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:26px;max-width:820px}

.drop{
  border:2px dashed var(--line);border-radius:12px;padding:46px 24px;text-align:center;
  background:var(--paper);transition:.16s ease;cursor:pointer;
}
.drop.drag{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,var(--paper))}
.drop svg{width:40px;height:40px;color:var(--ink-faint);margin-bottom:12px}
.drop h3{margin:0 0 6px;font-size:17px}
.drop p{margin:0;color:var(--ink-faint);font-size:13.5px}
.drop input{display:none}

.files{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:8px}
.file{display:flex;align-items:center;gap:12px;background:var(--paper);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;font-size:14px}
.file .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file .sz{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint)}
.file .x{cursor:pointer;color:var(--ink-faint);border:none;background:none;font-size:18px;line-height:1}
.file .x:hover{color:var(--c-organize)}
.file .drag-handle{cursor:grab;color:var(--ink-faint)}
.file.dragging{opacity:.5}

.opts{display:grid;gap:16px;margin-top:22px}
.opt{display:grid;gap:6px}
.opt label{font-size:13px;font-weight:500}
.opt .hint{font-size:12px;color:var(--ink-faint)}
.opt input[type=text],.opt input[type=number],.opt select{
  padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-family:inherit;font-size:14px;
  background:var(--white);color:var(--ink);max-width:340px}
.opt input:focus,.opt select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.opt-row{display:flex;gap:18px;flex-wrap:wrap}
.opt-inline{display:flex;align-items:center;gap:8px}
.opt-inline input[type=range]{width:200px}

.actions{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.actions .btn--primary{background:var(--accent);color:#fff;padding:13px 26px;font-size:15px}
.actions .btn--primary:hover{background:var(--accent-ink)}
.actions .btn--primary:disabled{opacity:.5;cursor:not-allowed;transform:none}

.status{margin-top:16px;font-size:14px;min-height:22px}
.status.err{color:var(--c-organize)}
.status.ok{color:var(--c-optimize)}

.result{margin-top:20px;background:color-mix(in srgb,var(--c-optimize) 9%,var(--white));
  border:1px solid color-mix(in srgb,var(--c-optimize) 30%,var(--line));border-radius:12px;
  padding:18px;display:none}
.result.show{display:block}
.result a.dl{display:inline-flex;align-items:center;gap:8px}

.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:14px;margin-top:20px}
.thumb{position:relative;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--paper);cursor:grab}
.thumb canvas,.thumb img{width:100%;display:block}
.thumb .pg{position:absolute;bottom:0;left:0;right:0;background:rgba(28,29,25,.7);color:#fff;
  font-family:var(--font-mono);font-size:11px;text-align:center;padding:2px}
.thumb.dragging{opacity:.4}
.thumb .del{position:absolute;top:5px;right:5px;background:rgba(28,29,25,.7);color:#fff;border:none;
  width:22px;height:22px;border-radius:6px;cursor:pointer;font-size:13px;line-height:1}

/* server-engine notice */
.notice{background:color-mix(in srgb,var(--c-security) 8%,var(--white));
  border:1px solid color-mix(in srgb,var(--c-security) 28%,var(--line));
  border-radius:12px;padding:20px;display:flex;gap:14px;margin-top:8px}
.notice svg{width:24px;height:24px;color:var(--c-security);flex:none;margin-top:2px}
.notice h3{margin:0 0 6px;font-size:16px}
.notice p{margin:0;color:var(--ink-soft);font-size:14px}
.notice code{font-family:var(--font-mono);font-size:12.5px;background:var(--paper-2);
  padding:2px 6px;border-radius:5px}

.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;
  border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* simple content pages */
.doc{padding:56px 0 80px;max-width:760px}
.doc h1{font-family:var(--font-display);font-weight:500;font-size:clamp(30px,5vw,46px);
  letter-spacing:-.02em;margin:0 0 8px}
.doc h2{font-family:var(--font-display);font-weight:600;font-size:22px;margin:34px 0 10px}
.doc p,.doc li{color:var(--ink-soft);font-size:16px;line-height:1.65}
.doc ul{padding-left:20px}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:980px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .hero__grid{grid-template-columns:1fr}
  .fan{display:none}
  .foot{grid-template-columns:1fr 1fr}
  .strip__inner{grid-template-columns:1fr}
}
@media (max-width:680px){
  .wrap{padding:0 18px}
  .grid{grid-template-columns:1fr}
  .nav__links{display:none}
  .foot{grid-template-columns:1fr 1fr}
  .hero{padding:44px 0 18px}
  .hero h1{font-size:clamp(34px,9vw,48px)}
}