/* ---------- Tokens ---------- */
:root {
  --ink: #14171c;
  --ink-soft: #3c4149;
  --paper: #eeece3;
  --paper-raised: #f8f7f2;
  --line: #d7d3c4;
  --moss: #0b6e4f;
  --moss-dark: #08543c;
  --brass: #b9852e;
  --danger: #a4372a;
  --radius: 3px;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --sans: "Inter", -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--moss-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 2px;
}

/* ---------- Layout shell ---------- */
.shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
}

.site-nav {
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.wordmark span { color: var(--moss); }

.site-nav nav {
  display: flex;
  gap: 20px;
  font-size: 0.92rem;
}
.site-nav nav a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px solid transparent; }
.site-nav nav a:hover { border-bottom-color: var(--moss); color: var(--ink); }

/* ---------- Hero / tool header ---------- */
.tool-hero {
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--line);
}
.tool-hero h1 {
  font-family: var(--serif);
  font-size: 2.4rem;
  line-height: 1.15;
  margin: 0 0 14px;
  max-width: 20ch;
}
.tool-hero p.lede {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0;
}

/* ---------- Tool card ---------- */
.tool-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  margin: 32px 0;
}

.dropzone {
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  background: var(--paper);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone.drag-over { border-color: var(--moss); background: #e7f1eb; }
.dropzone p { margin: 6px 0; }
.dropzone .hint { color: var(--ink-soft); font-size: 0.88rem; }
.dropzone input[type="file"] { display: none; }

.file-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 0.88rem;
}
.file-list li {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px dotted var(--line);
}
.file-list li .size { color: var(--ink-soft); }

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 20px;
  align-items: center;
}
.field-row label {
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.field-row input[type="text"],
.field-row input[type="number"],
.field-row select {
  font-family: var(--mono);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 10px;
  background: #fff;
  font-size: 0.92rem;
  width: 110px;
}
.field-row input[type="text"] { width: 200px; }

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.98rem;
  background: var(--moss);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 12px 24px;
  cursor: pointer;
  margin-top: 24px;
}
.btn:hover { background: var(--moss-dark); }
.btn:disabled { background: #9aa09a; cursor: not-allowed; }

.status {
  margin-top: 18px;
  font-size: 0.92rem;
  min-height: 1.4em;
}
.status.error { color: var(--danger); }
.status.success { color: var(--moss-dark); }

.result-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  display: none;
}
.result-box.show { display: block; }
.result-box .stat { font-family: var(--mono); font-size: 0.9rem; color: var(--ink-soft); }
.result-box a.download {
  display: inline-block;
  margin-top: 10px;
  font-weight: 600;
}

/* ---------- Content sections (SEO copy) ---------- */
.copy-section {
  padding: 20px 0 36px;
}
.copy-section h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  margin: 32px 0 10px;
}
.copy-section p { color: var(--ink-soft); max-width: 68ch; }

.faq dt {
  font-weight: 600;
  margin-top: 16px;
}
.faq dd {
  margin: 4px 0 0;
  color: var(--ink-soft);
  max-width: 65ch;
}

/* ---------- Home tool grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 32px 0;
}
.tool-grid a {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--paper-raised);
  text-decoration: none;
  color: var(--ink);
}
.tool-grid a:hover { border-color: var(--moss); }
.tool-grid h3 {
  font-family: var(--serif);
  margin: 0 0 6px;
  font-size: 1.15rem;
}
.tool-grid p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 28px 0 40px;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

@media (max-width: 620px) {
  .tool-hero h1 { font-size: 1.8rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; align-items: flex-start; }
}

/* ---------- Corner ad popup ---------- */
.ad-popup {
  position: fixed;
  bottom: 18px;
  right: 18px;
  width: 260px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(20, 23, 28, 0.18);
  z-index: 1000;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.ad-popup.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.ad-popup .ad-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  padding: 8px 10px 0;
}
.ad-popup .ad-close {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 20px;
  height: 20px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius);
}
.ad-popup .ad-close:hover { background: var(--paper); color: var(--ink); }
.ad-popup .ad-slot {
  padding: 6px 14px 14px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.82rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  margin: 0 12px 12px;
}
 
@media (max-width: 480px) {
  .ad-popup { left: 12px; right: 12px; width: auto; bottom: 12px; }
}
 
/* ---------- Corner ad slot ---------- */
#ad-corner {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 999;
  width: 300px;
  max-width: calc(100vw - 32px);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(20, 23, 28, 0.14);
  overflow: hidden;
}
#ad-corner .ad-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  font-size: 10.5px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
#ad-corner .ad-close {
  border: none;
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 2px 4px;
}
#ad-corner .ad-close:hover { color: var(--ink); }
#ad-corner .ad-slot {
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
#ad-corner.hidden { display: none; }
 
@media (max-width: 480px) {
  #ad-corner { width: calc(100vw - 24px); right: 12px; bottom: 12px; }
}