/* InvoLite — app demo */
:root {
  --accent: #4f46e5;
  --ink: #16181d;
  --muted: #5c6470;
  --bg-soft: #f4f5f7;
  --line: #e3e6eb;
}

body { background: var(--bg-soft); color: var(--ink); }

/* Nav */
.app-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.app-nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.app-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.01em; }
.app-brand-mark {
  display: grid; place-items: center; width: 30px; height: 30px;
  border-radius: 8px; background: var(--accent); color: #fff;
}
.app-nav-actions { display: flex; align-items: center; gap: 10px; }
.app-nav-actions .btn { padding: 8px 14px; font-size: 0.88rem; }
.app-nav-actions .btn-ghost { color: var(--muted); border-color: var(--line); background: #fff; }
.app-nav-actions .btn-ghost:hover { color: var(--ink); }

/* Layout */
.app-main {
  display: grid; grid-template-columns: minmax(340px, 460px) 1fr;
  gap: 28px; padding: 32px 0 64px; align-items: start;
}

/* Form */
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 24px; display: grid; gap: 18px;
}
.form-title { margin: 0; font-size: 1.05rem; font-weight: 700; }
.form-subtitle { margin: 6px 0 0; font-size: 0.95rem; font-weight: 700; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid-2 { margin-top: 4px; }
.form-card label { display: grid; gap: 6px; font-size: 0.82rem; font-weight: 600; color: var(--muted); }
.label-block { display: grid; gap: 6px; font-size: 0.82rem; font-weight: 600; color: var(--muted); }

.form-card input, .form-card textarea {
  font: inherit; color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 11px; background: #fff; width: 100%;
}
.form-card input:focus, .form-card textarea:focus {
  outline: 2px solid rgba(79,70,229,0.35); border-color: var(--accent);
}

/* Line items */
#items { display: grid; gap: 10px; }
.item-row {
  display: grid; grid-template-columns: 1fr 74px 96px 30px; gap: 8px; align-items: center;
}
.item-row input {
  font: inherit; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%;
}
.item-row input:focus { outline: 2px solid rgba(79,70,229,0.35); border-color: var(--accent); }
.item-remove {
  border: none; background: transparent; color: var(--muted);
  font-size: 1.1rem; line-height: 1; padding: 4px;
}
.item-remove:hover { color: #dc2626; }
.add-item { justify-self: start; padding: 8px 14px; font-size: 0.88rem; }

/* Preview */
.app-preview-wrap { position: sticky; top: 88px; }
.paper {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  box-shadow: 0 18px 50px rgba(22,24,29,0.10);
  padding: 40px 44px; min-height: 560px;
}
.paper-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; }
.paper-eyebrow { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.2em; color: var(--accent); margin: 0 0 4px; font-weight: 600; }
.paper-number { margin: 0; font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.paper-dates { display: grid; gap: 8px; text-align: right; }
.paper-dates span { display: block; font-size: 0.75rem; color: var(--muted); }
.paper-dates strong { font-size: 0.9rem; }

.paper-parties { display: flex; justify-content: space-between; gap: 24px; margin: 28px 0; }
.paper-label { display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.paper-parties strong { font-size: 0.98rem; }
.paper-sub { display: block; font-size: 0.85rem; color: var(--muted); }

.paper-table { width: 100%; border-collapse: collapse; }
.paper-table th {
  text-align: left; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); border-bottom: 2px solid var(--ink); padding: 8px 6px;
}
.paper-table th.num, .paper-table td.num { text-align: right; font-family: var(--font-mono); font-size: 0.86rem; }
.paper-table td { padding: 10px 6px; border-bottom: 1px solid var(--line); font-size: 0.92rem; vertical-align: top; }
.paper-table td.desc { font-weight: 500; }

.paper-totals { margin-top: 18px; margin-left: auto; width: 260px; display: grid; gap: 8px; }
.totals-row { display: flex; justify-content: space-between; font-size: 0.92rem; color: var(--muted); }
.totals-row strong { color: var(--ink); font-family: var(--font-mono); font-size: 0.9rem; }
.totals-grand {
  border-top: 2px solid var(--ink); margin-top: 6px; padding-top: 10px;
  font-size: 1.02rem; color: var(--ink); font-weight: 700;
}
.totals-grand strong { font-size: 1.15rem; font-weight: 700; }

.paper-notes {
  margin: 26px 0 0; padding: 14px 16px; background: var(--bg-soft);
  border-radius: 8px; font-size: 0.88rem; color: var(--muted); white-space: pre-wrap;
}

.app-footer { border-top: 1px solid var(--line); background: #fff; padding: 20px 0; color: var(--muted); font-size: 0.85rem; }

@media (max-width: 980px) {
  .app-main { grid-template-columns: 1fr; }
  .app-preview-wrap { position: static; }
  .paper { padding: 24px 18px; }
  .paper-table th, .paper-table td { padding: 8px 4px; }
  .paper-table th.num, .paper-table td.num { font-size: 0.78rem; }
  .paper-totals { width: 100%; }
  .app-nav-inner { height: auto; min-height: 64px; padding: 8px 0; flex-wrap: wrap; gap: 10px; }
  .app-nav-actions { flex-wrap: wrap; }
  .app-nav-actions .btn { padding: 7px 10px; font-size: 0.8rem; }
}

/* Print: only the invoice paper */
@media print {
  body { background: #fff; }
  .app-nav, .app-form, .app-footer { display: none !important; }
  .app-main { display: block; padding: 0; }
  .app-preview-wrap { position: static; }
  .paper { border: none; box-shadow: none; border-radius: 0; padding: 0; }
}