:root {
  --bg: #0b0f14;
  --bg-elevated: #121820;
  --bg-card: #161d27;
  --border: #243041;
  --text: #e8eef7;
  --muted: #8b9bb0;
  --accent: #3dffa8;
  --accent-dim: #1f9e68;
  --accent-soft: rgba(61, 255, 168, 0.12);
  --danger: #ff6b7a;
  --warn: #ffc857;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #143024 0%, transparent 50%),
              radial-gradient(900px 500px at 100% 0%, #1a2740 0%, transparent 45%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: min(1100px, calc(100% - 2rem)); margin: 0 auto; }

header.site {
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 20, 0.75);
  position: sticky;
  top: 0;
  z-index: 20;
}
header.site .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #5ad0ff);
  display: grid; place-items: center;
  color: #062016;
  font-weight: 800;
  font-size: 0.95rem;
}
.badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(61,255,168,0.25);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
nav.top a {
  color: var(--muted);
  margin-left: 1rem;
  font-size: 0.92rem;
}
nav.top a:hover { color: var(--text); }

.hero {
  padding: 3.5rem 0 2rem;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}
.hero h1 span { color: var(--accent); }
.hero p.lead {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 42rem;
  margin: 0 0 1.5rem;
}
.pills { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.pill {
  font-size: 0.82rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}

.section-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 2rem 0 0.9rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  transition: border-color 0.15s, transform 0.15s;
  color: inherit;
  text-decoration: none;
  display: block;
  box-shadow: var(--shadow);
}
a.card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  text-decoration: none;
}
.card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}
.card .ico {
  font-size: 1.35rem;
  margin-bottom: 0.55rem;
}

.tool-page { padding: 2rem 0 4rem; }
.tool-page h1 {
  font-size: 1.85rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}
.tool-page .sub {
  color: var(--muted);
  margin: 0 0 1.5rem;
  max-width: 40rem;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: calc(var(--radius) - 4px);
  padding: 2.2rem 1rem;
  text-align: center;
  cursor: pointer;
  background: rgba(255,255,255,0.02);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone strong { color: var(--accent); }
.dropzone p { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.9rem; }
.dropzone input { display: none; }

.file-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}
.file-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}
.file-list .meta { color: var(--muted); font-family: var(--mono); font-size: 0.8rem; }
.file-list button {
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 0.85rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: end;
  margin-top: 1rem;
}
label.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.82rem;
  color: var(--muted);
}
label.field input, label.field select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  min-width: 8rem;
  font: inherit;
}
label.field input[type="range"] { min-width: 12rem; padding: 0; }

.btn {
  appearance: none;
  border: none;
  border-radius: 10px;
  padding: 0.65rem 1.15rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:not(:disabled):hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5ad0ff);
  color: #062016;
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.status {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.4em;
}
.status.err { color: var(--danger); }
.status.ok { color: var(--accent); }

.privacy {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(61,255,168,0.2);
  color: var(--text);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}
.privacy strong { color: var(--accent); }

footer.site {
  border-top: 1px solid var(--border);
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.88rem;
}
footer.site .inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.loading-wasm {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--warn);
  font-size: 0.88rem;
}

.sig-pad {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: crosshair;
  touch-action: none;
  display: block;
  width: 100%;
  max-width: 480px;
  height: 160px;
}
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}
.editor-toolbar .btn { padding: 0.45rem 0.8rem; font-size: 0.88rem; }
.editor-toolbar .btn.active {
  outline: 2px solid var(--accent);
}
.preview-frame {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #1a1a1a;
  min-height: 200px;
  max-height: 480px;
  overflow: auto;
  padding: 0.5rem;
}
.preview-frame canvas { max-width: 100%; display: block; margin: 0 auto; }
.note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}
textarea.big {
  width: 100%;
  min-height: 160px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.65rem;
  font: inherit;
  resize: vertical;
}


.seo-block{margin:2.5rem 0;max-width:42rem}
.seo-block h2{font-size:1.25rem;margin:0 0 .75rem;letter-spacing:-.02em}
.seo-block ol,.seo-block ul{color:var(--muted);padding-left:1.25rem}
.seo-block li{margin:.4rem 0}
.faq details{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:.75rem 1rem;margin:.5rem 0}
.faq summary{cursor:pointer;font-weight:600;color:var(--text)}
.faq p{color:var(--muted);margin:.5rem 0 0;font-size:.92rem}
.trust-row{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 1.25rem}
.breadcrumb{font-size:.85rem;color:var(--muted);margin:1rem 0 .5rem}
.breadcrumb a{color:var(--muted)}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.6rem;margin:1rem 0 2rem}
.related-grid a{display:block;padding:.65rem .75rem;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;color:var(--text);text-decoration:none;font-size:.88rem;font-weight:600}
.related-grid a:hover{border-color:var(--accent-dim)}

/* GroundPDF brand */
.logo-mark { background: linear-gradient(135deg, #3dffa8, #7cffa0 40%, #c8f560); }
.badge { letter-spacing: 0.02em; }

.eyebrow {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}
.logo-mark {
  box-shadow: 0 0 0 2px rgba(61,255,168,0.25);
}