/* webm-mp4.com — core stylesheet */

:root{
  --paper:#F2F3F0;
  --surface:#FFFFFF;
  --ink:#15191E;
  --ink-2:#545C66;
  --ink-3:#69717B;
  --rule:#DDDFDA;
  --rule-2:#E9EAE6;
  --accent:#D2145A;
  --accent-dark:#A50E47;
  --accent-wash:#FCEEF3;
  --ok:#0F7A57;
  --ok-wash:#E8F5F0;
  --warn:#8A5A00;
  --warn-wash:#FBF2DF;

  --w:1080px;
  --prose:68ch;
  --r:4px;
  --gap:clamp(2.25rem,5vw,3.5rem);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;overflow-x:hidden}

/* No webfont by design: zero third-party requests, no render blocking,
   no layout shift from a font swap. */
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.6;
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}

img,svg,video{max-width:100%;height:auto;display:block}

a{color:var(--accent-dark);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--accent)}

:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:2px}

.wrap{width:100%;max-width:var(--w);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.prose{max-width:var(--prose)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;position:fixed;z-index:99;background:var(--ink);color:#fff;padding:.6rem 1rem;border-radius:var(--r)}

/* ---------- masthead ---------- */

.masthead{border-bottom:1px solid var(--rule);background:var(--surface)}
.masthead .wrap{display:flex;align-items:center;gap:1.5rem;min-height:60px;flex-wrap:wrap}

.wordmark{
  font-weight:700;font-size:1.0625rem;letter-spacing:-.03em;
  color:var(--ink);text-decoration:none;white-space:nowrap;
}
.wordmark:hover{color:var(--ink)}
.wordmark .arrow{color:var(--accent);padding-inline:.15em}

.mainnav{margin-left:auto}
.mainnav ul{display:flex;gap:1.25rem;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.mainnav a{
  color:var(--ink-2);text-decoration:none;font-size:.875rem;font-weight:500;
  padding-block:.35rem;border-bottom:2px solid transparent;
}
.mainnav a:hover{color:var(--ink);border-bottom-color:var(--accent)}
.mainnav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--ink)}

/* ---------- hero + tool ---------- */

.hero{padding-block:clamp(1.75rem,5vw,3rem) 0}

h1{
  font-size:clamp(1.9rem,4.4vw,3rem);
  line-height:1.05;letter-spacing:-.035em;font-weight:700;
  margin:0 0 .6rem;text-wrap:balance;
}
.standfirst{
  font-size:clamp(1rem,2vw,1.1875rem);color:var(--ink-2);
  margin:0 0 1.75rem;max-width:58ch;line-height:1.5;
}

/* the filmstrip converter */

.strip{
  background:var(--surface);
  border:1px solid var(--rule);
  border-radius:var(--r);
  overflow:hidden;
  margin-bottom:1rem;
}

.rail{
  height:15px;
  background:var(--ink);
  position:relative;
  overflow:hidden;
}
.rail::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(
    to right,
    transparent 0 8px,
    var(--paper) 8px 20px,
    transparent 20px 28px
  );
  -webkit-mask-image:linear-gradient(#000 0 0);
  mask-image:linear-gradient(#000 0 0);
}
.rail .fill{
  position:absolute;inset:0 auto 0 0;width:0;
  background:var(--accent);
  transition:width .25s linear;
}
.is-done .rail .fill{background:var(--ok)}

.strip-body{padding:clamp(1.25rem,3.5vw,2rem)}

.drop{
  border:2px dashed var(--rule);
  border-radius:var(--r);
  background:var(--paper);
  padding:clamp(1.5rem,5vw,3rem) 1.25rem;
  text-align:center;
  cursor:pointer;
  transition:border-color .15s,background .15s;
}
.drop:hover,.drop.dragover{border-color:var(--accent);background:var(--accent-wash)}
.drop.dragover{border-style:solid}

.drop-head{font-size:clamp(1.0625rem,2.4vw,1.3125rem);font-weight:600;letter-spacing:-.02em;margin:0 0 .35rem}
.drop-sub{color:var(--ink-2);font-size:.9375rem;margin:0}
.drop input[type=file]{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}

.btn{
  display:inline-block;border:1px solid transparent;border-radius:var(--r);
  font:inherit;font-weight:600;font-size:.9375rem;letter-spacing:-.01em;
  padding:.7rem 1.35rem;cursor:pointer;text-decoration:none;
  background:var(--accent);color:#fff;
}
.btn:hover{background:var(--accent-dark);color:#fff}
.btn:disabled{background:var(--rule);color:var(--ink-3);cursor:not-allowed}
.btn-quiet{background:transparent;color:var(--ink-2);border-color:var(--rule)}
.btn-quiet:hover{background:var(--paper);color:var(--ink);border-color:var(--ink-3)}
.btn-ok{background:var(--ok)}
.btn-ok:hover{background:#0B5F43;color:#fff}
.btn-row{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;margin-top:1.25rem}

.filecard{display:flex;gap:1rem;align-items:flex-start;flex-wrap:wrap}
.filecard .meta{min-width:0;flex:1}
.filename{
  font-weight:600;letter-spacing:-.015em;margin:0 0 .2rem;
  overflow-wrap:anywhere;
}
.filesize{color:var(--ink-2);font-size:.875rem;margin:0}

.status{
  margin:1rem 0 0;font-size:.9375rem;color:var(--ink-2);
  min-height:1.4em;
}
.status:empty{display:none}
.status.err{color:var(--accent-dark)}
.status.ok{color:var(--ok);font-weight:500}

.log{
  margin-top:.85rem;background:var(--ink);color:#C9CFD6;
  border-radius:var(--r);padding:.75rem .9rem;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.75rem;line-height:1.5;max-height:150px;overflow:auto;
  white-space:pre-wrap;word-break:break-all;
}
.log:empty{display:none}

.trust{
  display:flex;gap:1.5rem;flex-wrap:wrap;
  font-size:.875rem;color:var(--ink-2);
  margin:0 0 var(--gap);padding:0;list-style:none;
}
.trust li{display:flex;gap:.45rem;align-items:center}
.trust svg{flex:none;color:var(--ok)}

/* ---------- content ---------- */

main section{padding-block:0 var(--gap)}
main section:first-of-type{padding-top:0}

h2{
  font-size:clamp(1.35rem,2.9vw,1.75rem);line-height:1.15;
  letter-spacing:-.028em;font-weight:700;margin:0 0 .85rem;text-wrap:balance;
}
h3{
  font-size:1.0625rem;line-height:1.3;letter-spacing:-.018em;
  font-weight:600;margin:1.6rem 0 .4rem;
}
p{margin:0 0 1rem}
.prose li{margin-bottom:.4rem}

.steps{list-style:none;counter-reset:s;margin:0;padding:0;max-width:var(--prose)}
.steps li{
  counter-increment:s;position:relative;
  padding-left:2.4rem;margin-bottom:1rem;
}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:.05rem;
  width:1.7rem;height:1.7rem;border-radius:50%;
  background:var(--ink);color:#fff;
  display:grid;place-items:center;
  font-size:.8125rem;font-weight:700;
}
.steps strong{font-weight:600}

.tablewrap{overflow-x:auto;margin-bottom:1rem}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:.9375rem}
caption{text-align:left;color:var(--ink-2);font-size:.875rem;padding-bottom:.6rem}
th,td{text-align:left;padding:.7rem .9rem;border-bottom:1px solid var(--rule)}
thead th{
  font-weight:600;font-size:.8125rem;color:var(--ink-2);
  border-bottom:1px solid var(--ink);
}
tbody th{font-weight:600;width:30%}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}

.faq{border-top:1px solid var(--rule);max-width:var(--prose)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{
  cursor:pointer;padding:1rem 2rem 1rem 0;position:relative;
  font-weight:600;letter-spacing:-.015em;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:.4rem;top:1.45rem;
  width:9px;height:9px;border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:rotate(45deg);transition:transform .18s ease;
}
.faq details[open] summary::after{transform:rotate(-135deg)}
.faq summary:hover{color:var(--accent-dark)}
.faq .answer{padding:0 0 1rem}
.faq .answer p:last-child{margin-bottom:0}

/* related grid */

.grid{
  display:grid;gap:1px;background:var(--rule);
  border:1px solid var(--rule);border-radius:var(--r);overflow:hidden;
  grid-template-columns:repeat(auto-fill,minmax(215px,1fr));
}
.grid a{
  background:var(--surface);padding:.95rem 1.1rem;text-decoration:none;
  display:block;color:var(--ink);
}
.grid a:hover{background:var(--accent-wash);color:var(--ink)}
.grid .t{font-weight:600;font-size:.9375rem;letter-spacing:-.015em;display:block}
.grid .d{color:var(--ink-2);font-size:.8125rem;display:block;margin-top:.1rem}

.note{
  border-left:3px solid var(--accent);background:var(--surface);
  padding:1rem 1.2rem;border-radius:0 var(--r) var(--r) 0;
  max-width:var(--prose);margin-bottom:1rem;
}
.note p:last-child{margin-bottom:0}
.note code,p code,li code,td code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.875em;background:var(--rule-2);padding:.1em .35em;border-radius:3px;
}
pre{
  background:var(--ink);color:#D7DCE2;padding:1rem 1.1rem;border-radius:var(--r);
  overflow-x:auto;font-size:.8125rem;line-height:1.6;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  max-width:var(--prose);
}
pre code{background:none;padding:0;font-size:inherit;color:inherit}

.crumbs{font-size:.8125rem;color:var(--ink-3);padding-block:1rem 0;margin:0}
.crumbs a{color:var(--ink-2);text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.crumbs span{padding-inline:.4rem}

/* ---------- footer ---------- */

.foot{border-top:1px solid var(--rule);background:var(--surface);padding-block:2.25rem 2.5rem;margin-top:auto}
.foot-cols{display:grid;gap:1.75rem;grid-template-columns:repeat(auto-fit,minmax(165px,1fr));margin-bottom:1.75rem}
.foot h2{font-size:.8125rem;font-weight:600;color:var(--ink-2);margin:0 0 .6rem;letter-spacing:0}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:.15rem}
/* inline-block with vertical padding so each link is a comfortable tap target */
.foot a{
  color:var(--ink);text-decoration:none;font-size:.9375rem;
  display:inline-block;padding-block:.35rem;min-height:24px;
}
.foot a:hover{color:var(--accent-dark);text-decoration:underline}
.foot-base{
  border-top:1px solid var(--rule);padding-top:1.4rem;
  display:flex;gap:1rem;flex-wrap:wrap;justify-content:space-between;
  font-size:.875rem;color:var(--ink-2);
}
.foot-base p{margin:0}

body{min-height:100vh;display:flex;flex-direction:column}
main{flex:1}

/* keep the converter close to the top on phones: one scrolling nav row */
@media (max-width:720px){
  .masthead .wrap{gap:.5rem;padding-block:.5rem;min-height:0}
  .mainnav{margin-left:0;width:100%;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
  .mainnav::-webkit-scrollbar{display:none}
  .mainnav ul{flex-wrap:nowrap;gap:1rem;padding-bottom:1px}
  .mainnav a{white-space:nowrap}
  .hero{padding-top:1.5rem}
  .trust{gap:.5rem 1.25rem}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}