.tool-page{ padding: 150px 0 100px; }
.tool-header{ text-align: center; max-width: 600px; margin: 0 auto 40px; }
.tool-header h1{ font-size: clamp(2rem, 4.5vw, 2.8rem); font-weight: 900; letter-spacing: -0.03em; margin-bottom: 12px; }
.tool-header p{ color: var(--ink-soft); font-size: 1rem; }
.back-link{ display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; font-weight: 700; color: var(--ink-faint); margin-bottom: 18px; transition: color .2s ease, gap .2s ease; }
.back-link:hover{ color: var(--ink); gap: 10px; }
.back-link svg{ width: 14px; height: 14px; }

.inv-page{ max-width: 1280px; }

.inv-layout{
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 32px;
  align-items: start;
}

.inv-form-col{
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  padding: 32px; max-height: 78vh; overflow-y: auto;
}
.inv-block{ margin-bottom: 26px; }
.inv-block:last-of-type{ margin-bottom: 20px; }
.inv-block-title{ font-size: 0.78rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; color: var(--marketing); margin-bottom: 12px; }
.inv-grid-2{ display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.inv-form-col label{ font-weight: 700; font-size: 0.85rem; margin-bottom: 6px; display: block; color: var(--ink); }
.inv-form-col input[type="text"], .inv-form-col input[type="date"], .inv-form-col textarea{
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 0.92rem; font-family: inherit; background: #fff; color: var(--ink);
  margin-bottom: 14px; resize: vertical; transition: border-color .2s ease;
}
.inv-form-col input:focus, .inv-form-col textarea:focus{ outline: none; border-color: var(--marketing); }

.pill-options{ display: flex; gap: 8px; flex-wrap: wrap; }
.pill-option{
  font-family: inherit; border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 9px 14px; border-radius: 999px; font-weight: 700; font-size: 0.8rem; cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.pill-option.active{ background: var(--ink); color: var(--yellow); border-color: var(--ink); }
.pill-option:hover:not(.active){ border-color: var(--yellow-line); background: var(--yellow-soft); }

.inv-items{ display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.inv-item-row{
  display: grid; grid-template-columns: 1fr 50px 90px 28px; gap: 8px; align-items: center;
}
.inv-item-row input{ margin-bottom: 0 !important; padding: 9px 10px !important; font-size: 0.85rem !important; }
.inv-item-remove{
  width: 28px; height: 28px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-faint); cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; transition: background .2s ease, color .2s ease;
}
.inv-item-remove:hover{ background: var(--marketing); color: #fff; border-color: var(--marketing); }
.inv-add-btn{ width: 100%; padding: 10px; font-size: 0.85rem; }

.btn-block{ width: 100%; justify-content: center; }

/* ---------- preview column ---------- */
.inv-preview-col{ position: relative; }
.inv-preview-sticky{ position: sticky; top: 110px; }
.inv-preview-frame{
  background: #efece2; border-radius: var(--radius-lg); padding: 26px;
  box-shadow: inset 0 2px 12px rgba(27,21,8,0.06);
  max-height: 82vh; overflow-y: auto;
}
.inv-preview{
  width: 100%; max-width: 720px; margin: 0 auto;
  background: #fff; padding: 48px; font-family: 'Figtree', sans-serif; color: #1B1508;
  box-shadow: 0 20px 50px -20px rgba(27,21,8,0.25);
}

.inv-header{ display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 34px; }
.inv-biz-name{ font-size: 1.3rem; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 6px; }
.inv-biz-address{ font-size: 0.82rem; color: #67604C; white-space: pre-line; line-height: 1.5; }
.inv-title-block{ text-align: right; }
.inv-title{ font-size: 1.6rem; font-weight: 900; letter-spacing: 0.04em; }
.inv-number{ font-size: 0.85rem; color: #67604C; font-weight: 600; margin-top: 4px; }

.inv-meta-row{ display: flex; justify-content: space-between; gap: 20px; padding: 20px 0; border-top: 1px solid #eee; border-bottom: 1px solid #eee; margin-bottom: 26px; }
.inv-meta-label{ font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; color: #9A927A; margin-bottom: 6px; }
.inv-meta-value{ font-weight: 700; font-size: 0.98rem; }
.inv-meta-sub{ font-size: 0.82rem; color: #67604C; white-space: pre-line; margin-top: 3px; line-height: 1.5; }
.inv-meta-dates{ text-align: right; font-size: 0.82rem; }
.inv-meta-dates div{ margin-bottom: 6px; }
.inv-meta-dates span{ display: block; color: #9A927A; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.inv-meta-dates strong{ font-size: 0.9rem; }

.inv-table{ width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.inv-table th{ text-align: left; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: #9A927A; padding: 0 0 10px; border-bottom: 2px solid #1B1508; }
.inv-table th.right, .inv-table td.right{ text-align: right; }
.inv-table td{ padding: 12px 0; border-bottom: 1px solid #eee; font-size: 0.92rem; }
.inv-table td:first-child{ font-weight: 600; }

.inv-totals{ margin-left: auto; width: 260px; margin-bottom: 30px; }
.inv-totals > div{ display: flex; justify-content: space-between; font-size: 0.9rem; padding: 6px 0; color: #67604C; }
.inv-totals .hide{ display: none; }
.inv-total-final{ border-top: 2px solid #1B1508; margin-top: 6px; padding-top: 12px !important; font-size: 1.05rem !important; font-weight: 800; color: #1B1508 !important; }

.inv-footer{ border-top: 1px solid #eee; padding-top: 20px; font-size: 0.82rem; color: #67604C; line-height: 1.6; }
.inv-footer > div{ white-space: pre-line; margin-bottom: 10px; }

/* ---------- STYLE VARIANTS ---------- */

/* Minimal Gold (matches portfolio brand) */
.inv-preview[data-style="minimal-gold"] .inv-title{ color: #C1790A; }
.inv-preview[data-style="minimal-gold"] .inv-table th{ border-bottom-color: #C1790A; }
.inv-preview[data-style="minimal-gold"] .inv-total-final{ border-top-color: #C1790A; color: #C1790A !important; }
.inv-preview[data-style="minimal-gold"] .inv-meta-row{ border-color: #EADFB3; }

/* Modern Dark */
.inv-preview[data-style="modern-dark"]{ background: #fff; }
.inv-preview[data-style="modern-dark"] .inv-header{
  background: #1B1508; color: #F2E2B1; margin: -48px -48px 34px; padding: 40px 48px;
}
.inv-preview[data-style="modern-dark"] .inv-biz-address{ color: rgba(242,226,177,0.65); }
.inv-preview[data-style="modern-dark"] .inv-number{ color: rgba(242,226,177,0.65); }
.inv-preview[data-style="modern-dark"] .inv-table th{ border-bottom-color: #1B1508; }
.inv-preview[data-style="modern-dark"] .inv-total-final{ border-top-color: #1B1508; }

/* Classic Simple */
.inv-preview[data-style="classic-simple"] .inv-title{ color: #1B1508; font-weight: 700; letter-spacing: 0.02em; }
.inv-preview[data-style="classic-simple"] .inv-table th{ border-bottom-color: #333; }
.inv-preview[data-style="classic-simple"] .inv-total-final{ border-top-color: #333; }

@media (max-width: 980px){
  .inv-layout{ grid-template-columns: 1fr; }
  .inv-form-col{ max-height: none; }
  .inv-preview-sticky{ position: static; }
  .inv-preview{ padding: 28px; }
  .inv-preview[data-style="modern-dark"] .inv-header{ margin: -28px -28px 26px; padding: 26px 28px; }
}
@media (max-width: 540px){
  .inv-item-row{ grid-template-columns: 1fr 40px 70px 26px; }
}