/* ===== APP SHELL ===== */
.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  background: rgba(11, 11, 15, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--fg);
}

.app-nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-page {
  padding: 5.5rem 2rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border-radius: 10px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #0B0B0F;
}

.btn-primary:hover {
  background: #e8a842;
}

.btn-ghost {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: transparent;
  color: #e05252;
  border: 1px solid rgba(224,82,82,0.3);
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-danger:hover {
  background: rgba(224,82,82,0.1);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}

/* ===== PAGE HEADER ===== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-top: 0.25rem;
}

/* ===== INVOICE LIST ===== */
.invoice-table {
  width: 100%;
  border-collapse: collapse;
}

.invoice-table th {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.invoice-table td {
  padding: 1rem;
  border-bottom: 1px solid rgba(42,42,53,0.5);
  font-size: 0.9rem;
}

.invoice-table tr:hover td {
  background: var(--surface);
}

.invoice-table tr:last-child td {
  border-bottom: none;
}

.invoice-number {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--accent);
  font-size: 0.85rem;
}

.invoice-total {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.status-draft { background: rgba(153,148,138,0.15); color: var(--fg-muted); }
.status-sent  { background: rgba(61,139,94,0.15);  color: var(--green); }
.status-paid  { background: rgba(212,148,58,0.15); color: var(--accent); }

.lang-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.empty-state {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--fg-muted);
}

.empty-state h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

/* ===== FORM ===== */
.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.form-card-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group.full { grid-column: 1 / -1; }

label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
}

input[type="text"],
input[type="email"],
input[type="number"],
textarea,
select {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  padding: 0.65rem 0.9rem;
  font-size: 0.9rem;
  font-family: var(--font-body);
  width: 100%;
  transition: border-color 0.15s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

/* ===== LANGUAGE TOGGLE ===== */
.lang-toggle {
  display: flex;
  gap: 0.5rem;
}

.lang-toggle label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--fg);
  transition: all 0.15s;
}

.lang-toggle input[type="radio"] {
  width: auto;
  accent-color: var(--accent);
}

.lang-toggle input[type="radio"]:checked + span,
.lang-toggle label:has(input:checked) {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* ===== LINE ITEMS ===== */
.line-items-header {
  display: grid;
  grid-template-columns: 2fr 1fr 0.8fr 1fr 1fr 0.5fr;
  gap: 0.5rem;
  padding: 0.5rem 0;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.line-item-row {
  display: grid;
  grid-template-columns: 2fr 1fr 0.8fr 1fr 1fr 0.5fr;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  align-items: center;
}

.line-item-row input {
  margin: 0;
}

.line-item-amount {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent);
  text-align: right;
  padding-right: 0.5rem;
}

/* AR mode — show Arabic description field */
.ar-field { display: none; }
body.lang-ar .ar-field { display: flex; }
body.lang-ar .line-items-header { grid-template-columns: 1.5fr 1.5fr 1fr 0.8fr 1fr 1fr 0.5fr; }
body.lang-ar .line-item-row    { grid-template-columns: 1.5fr 1.5fr 1fr 0.8fr 1fr 1fr 0.5fr; }

/* ===== TOTALS ===== */
.totals-box {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  min-width: 280px;
  margin-left: auto;
  margin-top: 1.25rem;
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.total-row.grand {
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
}

.total-row.grand span:last-child { color: var(--accent); }

.error-msg {
  background: rgba(224,82,82,0.1);
  border: 1px solid rgba(224,82,82,0.3);
  color: #e05252;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

/* ===== INVOICE VIEW ===== */
.invoice-doc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  max-width: 860px;
  margin: 0 auto;
}

.invoice-doc-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.invoice-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.invoice-meta {
  text-align: right;
}

.invoice-meta .inv-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.invoice-meta .inv-date {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 0.25rem;
}

.invoice-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.party-block h4 {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.party-block p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

.party-block p strong {
  color: var(--fg);
  display: block;
  font-size: 1rem;
  margin-bottom: 0.15rem;
}

.milestone-banner {
  background: var(--accent-glow);
  border: 1px solid rgba(212,148,58,0.25);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.milestone-banner .phase {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(212,148,58,0.15);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
}

.milestone-banner .name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
}

.items-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.items-table th {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.items-table td {
  padding: 0.75rem;
  font-size: 0.875rem;
  border-bottom: 1px solid rgba(42,42,53,0.5);
}

.items-table tr:last-child td { border-bottom: none; }

.items-table .num { text-align: right; font-family: var(--font-heading); }

.invoice-totals {
  margin-left: auto;
  min-width: 260px;
  padding: 1.25rem 1.5rem;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.inv-total-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  padding: 0.35rem 0;
  color: var(--fg-muted);
}

.inv-total-row.grand {
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 0.65rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
}

.inv-total-row.grand span:last-child { color: var(--accent); }

.invoice-notes {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.invoice-notes h4 {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

.invoice-notes p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

.invoice-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

/* ===== ARABIC RTL ===== */
.invoice-doc.rtl {
  direction: rtl;
  text-align: right;
}

.invoice-doc.rtl .invoice-meta { text-align: left; }
.invoice-doc.rtl .items-table th,
.invoice-doc.rtl .items-table td { text-align: right; }
.invoice-doc.rtl .items-table .num { text-align: left; }

/* ===== PRINT ===== */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .app-nav, .invoice-actions, .no-print { display: none !important; }
  .app-page { padding: 0 !important; max-width: none !important; }
  .invoice-doc {
    background: #fff !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 1.5rem !important;
    box-shadow: none !important;
  }
  .invoice-doc .inv-num { color: #b5782e !important; }
  .items-table th { color: #555 !important; }
  .items-table td { color: #222 !important; }
  .party-block p { color: #444 !important; }
  .party-block p strong { color: #000 !important; }
  .milestone-banner { background: #fff8ee !important; border-color: #e0a830 !important; }
  .invoice-totals { background: #f9f9f9 !important; border-color: #ddd !important; }
  .inv-total-row { color: #555 !important; }
  .inv-total-row.grand { color: #000 !important; }
  .logo-mark { color: #b5782e !important; }
  .logo-text { color: #000 !important; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .app-page { padding: 4.5rem 1rem 3rem; }

  .page-header { flex-direction: column; align-items: flex-start; gap: 1rem; }

  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }

  .line-items-header,
  .line-item-row {
    grid-template-columns: 1fr 0.7fr 0.7fr 0.5fr;
  }

  /* Hide unit col on small screens */
  .line-items-header .col-unit,
  .line-item-row .col-unit { display: none; }

  .invoice-doc { padding: 1.5rem; }
  .invoice-doc-header { flex-direction: column; gap: 1rem; }
  .invoice-meta { text-align: left; }
  .invoice-parties { grid-template-columns: 1fr; gap: 1.25rem; }

  .invoice-table { font-size: 0.8rem; }
  .invoice-table th, .invoice-table td { padding: 0.6rem 0.5rem; }
}