/* ===========================================================
   fastfileconversion.com — shared stylesheet
   Design concept: drafting table / technical instrument panel.
   Files are treated like specimens on a blueprint bench —
   measured, labeled, and stamped as they're converted.
=========================================================== */

:root{
  --paper: #EEF3F8;
  --paper-raised: #FFFFFF;
  --grid-line: #C7D7E5;
  --grid-line-soft: #DCE7F0;
  --ink: #16324F;
  --ink-soft: #4C6580;
  --ink-faint: #7C93A9;
  --accent: #E4A11B;
  --accent-ink: #7A5710;
  --accent-soft: #FBEBC9;
  --teal: #2E8B7A;
  --teal-soft: #DCEEEA;
  --danger: #B4432F;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius: 3px;
  --max-width: 1080px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--paper);
  background-image:
    linear-gradient(var(--grid-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-soft) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a{ color: var(--ink); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.wrap{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
.site-header{
  border-bottom: 1px solid var(--grid-line);
  background: rgba(238,243,248,0.9);
  backdrop-filter: blur(4px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
.logo{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.logo .ext{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  padding: 1px 5px;
  border-radius: var(--radius);
  margin-left: 6px;
}
.site-nav{
  display: flex;
  gap: 24px;
  font-size: 0.92rem;
}
.site-nav a{
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover{ color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- breadcrumb ---------- */
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  padding: 14px 0 0;
}
.breadcrumb a{ color: var(--ink-faint); text-decoration: none; }
.breadcrumb a:hover{ color: var(--ink); }

/* ---------- hero ---------- */
.hero{
  padding: 72px 0 56px;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 860px){
  .hero-grid{ grid-template-columns: 1fr; }
}
.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.eyebrow::before{
  content: '';
  width: 8px; height: 8px;
  background: var(--teal);
  border-radius: 50%;
  display: inline-block;
}
h1{
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
}
.hero p.lede{
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 28px;
}
.cta-row{ display: flex; gap: 14px; flex-wrap: wrap; }
.btn{
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  display: inline-block;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary{ background: var(--ink); color: var(--paper); }
.btn-primary:hover{ background: #0E263E; }
.btn-ghost{ background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover{ background: var(--paper-raised); }

/* ---------- signature element: the conversion stamp ---------- */
.stamp-panel{
  background: var(--paper-raised);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
}
.stamp-panel::before{
  content: 'SPECIMEN';
  position: absolute;
  top: 10px; left: 14px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
.stamp-row{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 96px;
}
.badge{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.3rem;
  padding: 14px 20px;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  min-width: 92px;
  text-align: center;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.stamp-arrow{
  font-size: 1.6rem;
  color: var(--accent);
}
#stampFrom, #stampTo{ display: inline-block; }
.fade{ animation: fadeSwap 0.5s ease; }
@keyframes fadeSwap{
  0%{ opacity: 0; transform: translateY(4px); }
  100%{ opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce){
  .fade{ animation: none; }
}
.stamp-caption{
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-top: 18px;
}

/* ---------- trust strip ---------- */
.trust-strip{
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  padding: 22px 0;
}
.trust-strip .wrap{
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
}
.trust-item{
  font-size: 0.88rem;
  color: var(--ink-soft);
  display: flex;
  gap: 8px;
  align-items: center;
}
.trust-item .mark{
  font-family: var(--font-mono);
  color: var(--teal);
  font-weight: 700;
}

/* ---------- category schematic panels ---------- */
.category{ padding: 64px 0; }
.category-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.category-head h2{
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin: 0;
}
.category-head p{
  color: var(--ink-soft);
  margin: 4px 0 0;
  max-width: 52ch;
}
.panel-frame{
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 28px;
  position: relative;
}
.panel-frame::before, .panel-frame::after,
.corner-tl, .corner-br{ content: ''; position: absolute; width: 14px; height: 14px; border: 1.5px solid var(--ink-faint); }
.panel-frame::before{ top: -1px; left: -1px; border-right: none; border-bottom: none; }
.panel-frame::after{ bottom: -1px; right: -1px; border-left: none; border-top: none; }

.tool-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.tool-card{
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  transition: border-color 0.15s ease, transform 0.15s ease;
  display: block;
}
.tool-card:hover{ border-color: var(--accent); transform: translateY(-2px); }
.tool-card .pair{
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tool-card .pair .arrow{ color: var(--accent); }
.tool-card .desc{
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-top: 6px;
}
.tool-card.pending{
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
  border-style: dashed;
}
.tool-card.pending .desc::after{
  content: ' — in progress';
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* ---------- converter tool page ---------- */
.tool-hero{ padding: 40px 0 8px; }
.tool-hero h1{ font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
.tool-hero p.lede{ font-size: 1rem; }

.converter{
  padding: 32px 0 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 780px){
  .converter{ grid-template-columns: 1fr; }
}
.io-panel{
  background: var(--paper-raised);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
}
.io-panel-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
}
textarea{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  width: 100%;
  min-height: 320px;
  resize: vertical;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--paper);
  color: var(--ink);
}
.dropzone{
  border: 1.5px dashed var(--grid-line);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-bottom: 12px;
  cursor: pointer;
}
.dropzone.drag{ border-color: var(--accent); color: var(--accent-ink); background: var(--accent-soft); }
.io-actions{
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.btn-small{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}
.btn-small:hover{ background: var(--ink); color: var(--paper); }
.btn-small.accent{ border-color: var(--accent); background: var(--accent); color: var(--ink); }
.btn-small.accent:hover{ background: var(--accent-ink); color: var(--paper); }
.status-line{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin-top: 10px;
  min-height: 18px;
}
.status-line.ok{ color: var(--teal); }
.status-line.err{ color: var(--danger); }

/* ---------- image converter ---------- */
.image-drop{
  border: 1.5px dashed var(--grid-line);
  border-radius: var(--radius);
  padding: 32px 16px;
  text-align: center;
  color: var(--ink-faint);
  cursor: pointer;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.image-drop.drag{ border-color: var(--accent); color: var(--accent-ink); background: var(--accent-soft); }
.image-drop .hint{ font-size: 0.82rem; }
.image-drop .hint-sub{ font-family: var(--font-mono); font-size: 0.72rem; }
.preview-wrap{
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.preview-wrap img{
  max-width: 100%;
  max-height: 320px;
  display: block;
}
.quality-row{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.quality-row input[type="range"]{ flex: 1; accent-color: var(--accent); }

/* ---------- faq ---------- */
.faq{ padding: 0 0 64px; }
.faq h2{ font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 18px; }
.faq-item{
  border-top: 1px solid var(--grid-line);
  padding: 18px 0;
}
.faq-item:last-child{ border-bottom: 1px solid var(--grid-line); }
.faq-item h3{ font-size: 1rem; margin: 0 0 8px; }
.faq-item p{ margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- footer ---------- */
.site-footer{
  border-top: 1px solid var(--grid-line);
  padding: 32px 0 48px;
}
.site-footer .wrap{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.footer-links{ display: flex; gap: 20px; font-size: 0.85rem; }
.footer-links a{ color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover{ color: var(--ink); }
.footer-note{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

/* ---------- related converters ---------- */
.related{ padding: 0 0 48px; }
.related h2{
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 16px;
}
.related-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}