/* ToolNest — design system
   Palette:
   --ink:      #1C2430  (near-black text, slate not pure black)
   --paper:    #F3F5F7  (cool light background, not cream)
   --panel:    #FFFFFF  (card/panel surface)
   --line:     #DDE3E8  (hairline borders)
   --navy:     #1E3A5F  (primary brand — trust)
   --navy-ink: #14283F  (navy hover/dark)
   --amber:    #E8A33D  (accent — action / "tool" warmth)
   --amber-ink:#C6842A
   --teal:     #1E7F72  (category: QR / media)
   --green:    #2E7D4F  (category: tax / money)
   --rose:     #C1495A  (category: destructive / error)
   Type: 'Space Grotesk' for display/headings (mechanical, technical character),
         'Inter' for body/UI text.
*/

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --ink: #1C2430;
  --ink-soft: #4B5563;
  --paper: #F3F5F7;
  --panel: #FFFFFF;
  --line: #DDE3E8;
  --navy: #1E3A5F;
  --navy-ink: #14283F;
  --amber: #E8A33D;
  --amber-ink: #C6842A;
  --teal: #1E7F72;
  --green: #2E7D4F;
  --rose: #C1495A;
  --radius: 6px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 16px;
}
h1, h2, h3, h4, .display {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}
p { margin: 0 0 1em; color: var(--ink-soft); max-width: 62ch; }
a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
button { font-family: inherit; }

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

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.25rem;
  color: var(--ink);
}
.brand-mark {
  width: 30px; height: 30px; border-radius: 7px;
  background: var(--navy);
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.brand-mark svg { width: 16px; height: 16px; }
.brand:hover { text-decoration: none; }
.main-nav { display: flex; gap: 28px; }
.main-nav a {
  color: var(--ink-soft); font-weight: 500; font-size: .95rem;
}
.main-nav a:hover { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 600; font-size: .95rem;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, transform .05s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-ink); }
.btn-amber { background: var(--amber); color: var(--navy-ink); }
.btn-amber:hover { background: var(--amber-ink); color: #fff; }
.btn-outline { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--navy); color: var(--navy); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-lg { padding: 16px 28px; font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line);
}
.hero h1 { font-size: clamp(2rem, 4vw, 2.75rem); max-width: 18ch; }
.hero p { font-size: 1.1rem; max-width: 52ch; }
.hero-search {
  margin-top: 28px; max-width: 480px;
  display: flex; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); overflow: hidden;
}
.hero-search input {
  flex: 1; border: none; padding: 13px 16px; font-size: .95rem; font-family: inherit;
  outline: none; background: transparent; color: var(--ink);
}
.hero-search button {
  border: none; background: var(--navy); color: #fff; padding: 0 18px; cursor: pointer;
}

/* ---------- Tool grid ---------- */
.section { padding: 48px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 20px; }
.section-head h2 { font-size: 1.4rem; }
.eyebrow { font-size: .8rem; color: var(--ink-soft); font-weight: 500; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex; flex-direction: column; gap: 10px;
  color: var(--ink);
  transition: border-color .15s ease;
}
.tool-card:hover { border-color: var(--navy); text-decoration: none; }
.tool-icon {
  width: 40px; height: 40px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.tool-icon svg { width: 20px; height: 20px; stroke: #fff; }
.icon-pdf { background: var(--rose); }
.icon-image { background: var(--navy); }
.icon-qr { background: var(--teal); }
.icon-tax { background: var(--green); }
.tool-card h3 { font-size: 1.02rem; margin: 0; }
.tool-card p { font-size: .88rem; margin: 0; }
.tool-card .tag {
  margin-top: auto; font-size: .75rem; color: var(--ink-soft);
  border-top: 1px solid var(--line); padding-top: 10px;
}

/* ---------- Tool page shell ---------- */
.tool-page-head { padding: 40px 0 8px; }
.breadcrumb { font-size: .85rem; color: var(--ink-soft); margin-bottom: 14px; }
.breadcrumb a { color: var(--ink-soft); }
.tool-page-head h1 { font-size: 1.9rem; }
.tool-page-head p { font-size: 1.02rem; }

.tool-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px;
  margin: 24px 0 48px;
}
.drop-zone {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--navy); background: #F8FAFB; }
.drop-zone svg { width: 34px; height: 34px; stroke: var(--navy); margin-bottom: 12px; }
.drop-zone .hint { font-size: .82rem; color: var(--ink-soft); margin-top: 6px; }

.file-list { list-style: none; padding: 0; margin: 20px 0 0; display: flex; flex-direction: column; gap: 8px; }
.file-row {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 14px; font-size: .9rem;
}
.file-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .size { color: var(--ink-soft); font-size: .82rem; }
.file-row .remove { color: var(--rose); cursor: pointer; background: none; border: none; font-size: .85rem; }

.form-row { margin: 18px 0; }
.form-row label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 8px; }
.form-row input[type=text], .form-row input[type=number], .form-row select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  font-family: inherit; font-size: .95rem; background: var(--paper);
}
.form-row .field-note { font-size: .8rem; color: var(--ink-soft); margin-top: 6px; }
.radio-group { display: flex; gap: 10px; flex-wrap: wrap; }
.radio-group label {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 14px; font-weight: 500; font-size: .88rem; cursor: pointer;
  background: var(--paper);
}
.radio-group input { accent-color: var(--navy); }
.radio-group label:has(input:checked) { border-color: var(--navy); background: #EAF0F6; }

.progress-track {
  width: 100%; height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; margin: 18px 0;
  display: none;
}
.progress-track.active { display: block; }
.progress-bar { height: 100%; width: 0%; background: var(--navy); transition: width .2s ease; }

.result-box {
  margin-top: 20px; padding: 20px; border-radius: var(--radius);
  background: #EFF7F1; border: 1px solid #CFE7D6; display: none;
}
.result-box.active { display: block; }
.result-box.error { background: #FBECEC; border-color: #F0CBCB; }
.result-box h4 { margin: 0 0 6px; font-size: 1rem; }
.result-box p { margin: 0 0 14px; font-size: .9rem; }

.status-line { font-size: .88rem; color: var(--ink-soft); margin-top: 10px; min-height: 1.2em; }

/* GST calculator */
.gst-result {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px;
}
.gst-result .cell {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; text-align: center;
}
.gst-result .cell .amount { font-family: 'Space Grotesk', sans-serif; font-size: 1.3rem; font-weight: 600; }
.gst-result .cell .label { font-size: .8rem; color: var(--ink-soft); margin-top: 4px; }

/* Preview thumbnails (PDF split/merge) */
.thumb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px,1fr)); gap: 12px; margin-top: 18px; }
.thumb {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--paper);
  display: flex; flex-direction: column; align-items: center; padding: 8px; font-size: .75rem; color: var(--ink-soft);
}
.thumb canvas, .thumb img { width: 100%; border: 1px solid var(--line); background: #fff; }
.thumb.selected { border-color: var(--rose); }
.thumb .idx { margin-top: 6px; }

/* ---------- Trust strip ---------- */
.trust-strip { border-top: 1px solid var(--line); background: var(--panel); padding: 28px 0; }
.trust-strip .wrap { display: flex; gap: 32px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 10px; font-size: .88rem; color: var(--ink-soft); }
.trust-item svg { width: 18px; height: 18px; stroke: var(--navy); flex: none; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 24px; }
.footer-grid h5 { font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); margin: 0 0 12px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-grid a { color: var(--ink-soft); font-size: .88rem; }
.footer-grid a:hover { color: var(--navy); }
.footer-bottom {
  margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line);
  font-size: .82rem; color: var(--ink-soft);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .main-nav { position: fixed; inset: 64px 0 0 0; background: var(--panel); flex-direction: column;
    padding: 24px; transform: translateY(-110%); transition: transform .2s ease; gap: 18px; }
  .main-nav.open { transform: translateY(0); }
  .nav-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border: 1px solid var(--line); border-radius: var(--radius);
    background: none; cursor: pointer;
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .tool-panel { padding: 20px; }
  .gst-result { grid-template-columns: 1fr; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--navy); outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* SEO navigation helpers */
.breadcrumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:.85rem;color:var(--ink-soft);margin:0 0 18px}
.breadcrumbs a{color:var(--navy)}
.pagination{display:flex;gap:7px;justify-content:center;align-items:center;margin-top:28px;flex-wrap:wrap}
.pagination a{display:inline-flex;min-width:38px;height:38px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:7px;color:var(--ink);text-decoration:none}
.pagination a.active{background:var(--navy);color:#fff;border-color:var(--navy)}