/* ─────────────────────────────────────────────
   TOOLS, shared styles for /tools/* pages
   Dark app chrome + a light "paper" preview,
   because a printed GST invoice should look like
   a real business document, not a dark-mode UI.
───────────────────────────────────────────── */

.invoice-app {
  display: grid;
  grid-template-columns: minmax(340px, 440px) 1fr;
  gap: 32px;
  align-items: start;
  padding: 30px 48px 90px;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── form column ── */
.invoice-form { display: flex; flex-direction: column; gap: 18px; }

.inv-panel {
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 20px 22px;
}
.inv-panel-title {
  font-weight: 700; font-size: calc(12px * var(--font-scale));
  letter-spacing: 0.5px; text-transform: uppercase;
  color: var(--accent-text); margin-bottom: 14px;
}
.inv-panel label {
  display: block; font-size: calc(12.5px * var(--font-scale));
  color: var(--text-mid); margin-bottom: 12px;
}
.inv-panel label:last-child { margin-bottom: 0; }
.inv-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.inv-panel input, .inv-panel textarea, .inv-panel select {
  display: block; width: 100%; margin-top: 6px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; color: var(--text-hi);
  font-family: 'Inter', sans-serif; font-size: calc(13.5px * var(--font-scale));
  transition: border-color 0.2s, box-shadow 0.2s;
}
.inv-panel input:focus, .inv-panel textarea:focus, .inv-panel select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim);
}
.inv-panel textarea { resize: vertical; font-family: inherit; }
.inv-panel select { appearance: none; cursor: pointer; }

.inv-item-row {
  display: grid;
  grid-template-columns: 1fr 26px;
  grid-template-areas: "desc remove" "fields fields";
  gap: 6px 8px; align-items: center; margin-bottom: 14px;
}
.inv-item-row .it-desc { grid-area: desc; }
.inv-item-row .it-fields {
  grid-area: fields;
  display: grid; grid-template-columns: 84px 56px 1fr 64px; gap: 6px;
}
.inv-item-row input, .inv-item-row select {
  margin-top: 0; padding: 8px 8px; font-size: calc(12.5px * var(--font-scale));
}
.inv-item-row .it-hsn::placeholder { font-size: calc(11px * var(--font-scale)); }
.inv-item-remove {
  background: transparent; border: 1px solid var(--border); border-radius: 6px;
  color: var(--text-dim); width: 26px; height: 26px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
  transition: border-color 0.2s, color 0.2s;
}
.inv-item-remove:hover { border-color: #F87171; color: #F87171; }
.inv-add-btn { width: 100%; margin-top: 4px; padding: 10px 22px; font-size: calc(13px * var(--font-scale)); text-align: center; cursor: pointer; }

.inv-actions { display: flex; gap: 10px; }
/* .btn-primary/.btn-ghost/.btn-wa-doc default to generous standalone padding
   (14px 32px) meant for a full-width CTA - in this 3-up flex:1 row each button
   is only ~130px wide, so that padding left almost no room for the label and
   forced it onto 3+ broken lines. Override padding + font-size here, scoped to
   this row only, so standalone uses of these classes elsewhere are unaffected. */
.inv-actions .btn-primary, .inv-actions .btn-ghost, .inv-actions .btn-wa-doc {
  flex: 1; text-align: center; cursor: pointer;
  padding: 12px 8px !important; font-size: calc(12.5px * var(--font-scale)) !important;
}
.inv-savenote { font-size: calc(11.5px * var(--font-scale)); color: var(--text-dim); text-align: center; }

/* ── invoice preview: a light "paper" sheet inside the dark app ── */
.invoice-preview-wrap { position: sticky; top: 90px; }
.invoice-sheet {
  background: #FFFFFF; color: #1A1A2E;
  border-radius: 6px; padding: 40px 44px;
  font-family: 'Inter', sans-serif;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.inv-head { display: flex; justify-content: space-between; gap: 20px; border-bottom: 2px solid #1A1A2E; padding-bottom: 18px; margin-bottom: 18px; }
.inv-seller-name { font-family: 'Fraunces', serif; font-weight: 700; font-size: 20px; }
.inv-seller-meta { font-size: 12.5px; color: #555; line-height: 1.6; }
.inv-head-right { text-align: right; }
.inv-doctitle { font-weight: 700; letter-spacing: 1px; font-size: 14px; color: #8C6A1D; margin-bottom: 10px; }
.inv-meta { font-size: 12.5px; color: #555; display: flex; justify-content: flex-end; gap: 8px; }
.inv-meta strong { color: #1A1A2E; }
.inv-billto { margin-bottom: 20px; }
.inv-billto .inv-panel-title { color: #8C6A1D; }
.inv-buyer-name { font-weight: 700; font-size: 14.5px; }

.inv-table { width: 100%; border-collapse: collapse; font-size: 12px; margin-bottom: 16px; }
.inv-table th {
  background: #F3F1FA; color: #1A1A2E; font-weight: 700;
  text-align: right; padding: 8px 10px; border: 1px solid #E4E0F5;
}
.inv-table th.inv-col-desc, .inv-table td.inv-col-desc { text-align: left; }
.inv-table td { padding: 8px 10px; border: 1px solid #E4E0F5; text-align: right; }
.inv-table tbody tr:nth-child(even) { background: #FAFAFD; }

.inv-totals { max-width: 300px; margin-left: auto; margin-bottom: 18px; }
.inv-totals-row { display: flex; justify-content: space-between; font-size: 13px; padding: 5px 0; color: #555; }
.inv-totals-row.inv-grand { border-top: 2px solid #1A1A2E; margin-top: 6px; padding-top: 10px; font-size: 15px; font-weight: 700; color: #1A1A2E; }

.inv-words { font-size: 12.5px; font-style: italic; color: #555; margin-bottom: 24px; }

.inv-foot { display: flex; justify-content: space-between; gap: 30px; border-top: 1px solid #E4E0F5; padding-top: 18px; }
.inv-foot-label { font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: 0.4px; color: #8C6A1D; margin: 8px 0 2px; }
.inv-sign { text-align: right; min-width: 200px; }
.inv-sign-line { font-size: 12.5px; color: #555; }
.inv-sign-space { height: 46px; }

@media (max-width: 900px) {
  .invoice-app { grid-template-columns: 1fr; padding: 24px 20px 70px; }
  .invoice-preview-wrap { position: static; }
  .invoice-sheet { padding: 26px 22px; }
  .inv-item-row { grid-template-columns: 1fr 1fr; }
}

/* ── print: only the invoice sheet, full page, nothing else ── */
@media print {
  nav, .invoice-form, footer, section > .section-label, section > .section-title, section > .section-sub,
  .grad-bg, #scene-canvas { display: none !important; }
  body { background: #fff !important; }
  .invoice-app { display: block; padding: 0; max-width: none; }
  .invoice-preview-wrap { position: static; }
  .invoice-sheet { box-shadow: none; border-radius: 0; padding: 0; }
}