/* PDF Tools — styled with the SeptemberTotSeptember design language.
   The s2s shell + base primitives are ported in directly (rather than linked
   from the main domain) so the tool stays standalone and offline-capable. */

:root {
  --s2s-bg:           #f0f2f5;
  --s2s-surface:      #ffffff;
  --s2s-border:       #e5e7eb;
  --s2s-border-soft:  #f3f4f6;

  --s2s-text:         #1a1a1a;
  --s2s-text-muted:   #6b7280;
  --s2s-text-strong:  #1a1a2e;

  --s2s-primary:      #2563eb;
  --s2s-primary-hover:#1d4ed8;
  --s2s-primary-soft: #e0e7ff;

  --s2s-danger:       #b91c1c;
  --s2s-danger-soft:  #fee2e2;

  --s2s-radius:       8px;
  --s2s-radius-sm:    6px;
  --s2s-shadow-sm:    0 1px 3px rgba(0,0,0,.08);
  --s2s-shadow-md:    0 4px 12px rgba(0,0,0,.12);

  --s2s-font:         system-ui, -apple-system, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--s2s-font);
  font-size: 14px;
  background: var(--s2s-bg);
  color: var(--s2s-text);
  min-height: 100vh;
  line-height: 1.45;
}

h1, h2, h3, h4 { color: var(--s2s-text-strong); margin: 0; }

/* The navy shell header + .app-nav base come from the shared /assets/s2s-shell.css. */

/* ── Buttons (s2s) ──────────────────────────────────────────────────────── */
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  font: inherit;
  font-weight: 500;
  padding: .45rem .9rem;
  border: 1px solid var(--s2s-border);
  border-radius: var(--s2s-radius-sm);
  background: var(--s2s-surface);
  color: var(--s2s-text-strong);
  cursor: pointer;
  text-decoration: none;
  transition: background .12s, box-shadow .12s, transform .04s, border-color .12s;
}
button:hover, .btn:hover { background: var(--s2s-border-soft); }
button:active, .btn:active { transform: translateY(1px); }
button:disabled, .btn:disabled { opacity: .55; cursor: not-allowed; }
button:disabled:hover { background: var(--s2s-surface); }

.btn-primary { background: var(--s2s-primary); color: #fff; border-color: var(--s2s-primary); }
.btn-primary:hover { background: var(--s2s-primary-hover); border-color: var(--s2s-primary-hover); }
.btn-sm { padding: .3rem .6rem; font-size: .82rem; }

/* ── Toolbar (sits under the shell header like an app-nav) ──────────────── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: .65rem 2rem;
  background: var(--s2s-surface);
  border-bottom: 1px solid var(--s2s-border);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
#toolbar strong { color: var(--s2s-text-strong); font-size: 1rem; }
#toolbar .status { margin-left: auto; color: var(--s2s-text-muted); font-size: .85rem; }

/* ── Zones (cards) ──────────────────────────────────────────────────────── */
main { padding: 1.5rem 2rem; max-width: 1200px; margin: 0 auto; }
.zone {
  background: var(--s2s-surface);
  border: 1px solid var(--s2s-border);
  border-radius: var(--s2s-radius);
  box-shadow: var(--s2s-shadow-sm);
  padding: 1.1rem 1.3rem;
  margin-bottom: 1.5rem;
}
.zone-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--s2s-border-soft);
}
.zone-head h2 { font-size: 1.05rem; font-weight: 600; }
.zone-head .hint { color: var(--s2s-text-muted); font-size: .78rem; }
.zone-head .spacer { flex: 1; }

.empty { color: var(--s2s-text-muted); padding: .5rem 0; }

/* ── Input file rows ────────────────────────────────────────────────────── */
.file {
  border: 1px solid var(--s2s-border);
  border-radius: var(--s2s-radius-sm);
  margin-bottom: 10px;
  background: var(--s2s-surface);
  overflow: hidden;
}
.file.dragging { opacity: 0.4; }
.file.insert-before { box-shadow: 0 -3px 0 var(--s2s-primary); }
.file.insert-after  { box-shadow: 0  3px 0 var(--s2s-primary); }

.file-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: .5rem .65rem;
  background: var(--s2s-border-soft);
  border-bottom: 1px solid var(--s2s-border);
  flex-wrap: wrap;
  cursor: grab;
}
.file.collapsed .file-header { border-bottom: none; }
.file-title {
  font-weight: 600;
  color: var(--s2s-text-strong);
  margin-right: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 40ch;
}
.file-header button { padding: .2rem .5rem; font-size: .82rem; }
.file.collapsed .file-pages { display: none; }

/* small read-only previews inside an input file */
.file-pages {
  display: grid;
  grid-template-columns: repeat(auto-fill, 90px);
  gap: 8px;
  padding: .8rem;
}
.file-pages .mini {
  width: 90px;
  height: 110px;
  border: 1px solid var(--s2s-border);
  border-radius: 4px;
  background: var(--s2s-border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: grab;
  transition: box-shadow .12s, border-color .12s;
}
.file-pages .mini:hover { border-color: var(--s2s-primary); box-shadow: var(--s2s-shadow-sm); }
.file-pages .mini.dragging { opacity: 0.4; }
.file-pages .mini img { max-width: 90%; max-height: 90%; background: #fff; }

/* ── Page grid (output) ─────────────────────────────────────────────────── */
.pages {
  display: grid;
  grid-template-columns: repeat(auto-fill, 150px);
  gap: 12px;
  min-height: 70px;
}

.page {
  width: 150px;
  border: 1px solid var(--s2s-border);
  border-radius: var(--s2s-radius-sm);
  background: var(--s2s-surface);
  box-shadow: var(--s2s-shadow-sm);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: grab;
  transition: box-shadow .15s;
}
.page:hover { box-shadow: var(--s2s-shadow-md); }
.page.dragging { opacity: 0.4; }
.page.insert-before { box-shadow: -3px 0 0 var(--s2s-primary); }
.page.insert-after  { box-shadow:  3px 0 0 var(--s2s-primary); }

.thumb-wrap {
  width: 100%;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--s2s-border-soft);
}
.thumb-wrap img {
  max-width: 90%;
  max-height: 90%;
  transition: transform 0.1s;
  background: #fff;
  box-shadow: var(--s2s-shadow-sm);
}
.thumb-wrap.blank {
  background: repeating-linear-gradient(45deg, #f0f0f0, #f0f0f0 8px, #e6e6e6 8px, #e6e6e6 16px);
  color: var(--s2s-text-muted);
}

.page-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 4px;
  border-top: 1px solid var(--s2s-border-soft);
}
.page-toolbar button { padding: .1rem .4rem; font-size: 12px; }
.page-label {
  font-size: 11px;
  color: var(--s2s-text-muted);
  padding: .25rem .4rem;
  text-align: center;
}

#outputPages.drop-target { outline: 2px dashed var(--s2s-primary); outline-offset: 4px; border-radius: var(--s2s-radius-sm); }

/* ── Drag & drop file overlay ───────────────────────────────────────────── */
#dropOverlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(37, 99, 235, 0.18);
  border: 4px dashed var(--s2s-primary);
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
#dropOverlay.active { display: flex; }
#dropOverlay .drop-msg {
  background: var(--s2s-primary);
  color: #fff;
  font-size: 22px;
  font-weight: 600;
  padding: 16px 28px;
  border-radius: var(--s2s-radius);
  box-shadow: var(--s2s-shadow-md);
}