/* ════════ RESET ════════ */
* { box-sizing: border-box; margin: 0; padding: 0; }

/* ════════════════════════════════════
   LOGIN SCREEN
════════════════════════════════════ */
#login-screen {
  position: fixed;
  inset: 0;
  background: #1a1a1a;
  display: flex;          /* shown by default until Firebase confirms auth */
  align-items: center;
  justify-content: center;
  z-index: 9999;
  font-family: 'Georgia', serif;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 52px 48px 44px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.5);
}

.login-card .brand {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #bbb;
  margin-bottom: 10px;
  font-family: Arial, sans-serif;
}

.login-card h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.login-card .subtitle {
  font-size: 13px;
  color: #aaa;
  margin-bottom: 36px;
  font-family: Arial, sans-serif;
}

.login-field {
  margin-bottom: 16px;
}

.login-field label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #999;
  margin-bottom: 6px;
  font-family: Arial, sans-serif;
}

.login-field input {
  width: 100%;
  border: 1.5px solid #e4e4e4;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
  font-family: Arial, sans-serif;
  color: #222;
  background: #fafafa;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.login-field input:focus {
  border-color: #7a9e75;
  background: #fff;
}

.login-error {
  font-size: 12.5px;
  color: #c0392b;
  min-height: 20px;
  margin-bottom: 16px;
  font-family: Arial, sans-serif;
  background: #fff5f5;
  border-radius: 6px;
  padding: 0;
  transition: padding 0.2s;
}
.login-error:not(:empty) {
  padding: 10px 14px;
  border: 1px solid #fcc;
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: #2c2c2c;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  font-family: 'Georgia', serif;
  transition: background 0.2s, opacity 0.2s;
}
.login-btn:hover:not(:disabled) { background: #444; }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.login-footer {
  margin-top: 24px;
  font-size: 11px;
  color: #ccc;
  text-align: center;
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

/* ════════════════════════════════════
   APP SHELL  (hidden until logged in)
════════════════════════════════════ */
#app-shell {
  display: none;           /* Firebase onAuthStateChanged will set to flex */
  flex-direction: column;
  align-items: center;
  width: 100%;
}

body {
  font-family: 'Georgia', serif;
  background: #f0ede8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  color: #1a1a1a;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1320px;
  margin-bottom: 28px;
}

h1.app-title {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #999;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

#user-email {
  font-size: 11px;
  color: #aaa;
  font-family: Arial, sans-serif;
}

.logout-btn {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #bbb;
  background: none;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 6px 14px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.logout-btn:hover { color: #555; border-color: #aaa; }

.editor-wrapper {
  display: flex;
  gap: 32px;
  width: 100%;
  max-width: 1320px;
  align-items: flex-start;
}

/* ════════════════════════════════════
   FORM PANEL
════════════════════════════════════ */
.form-panel {
  width: 340px;
  flex-shrink: 0;
  background: #fff;
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
  position: sticky;
  top: 40px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.form-panel::-webkit-scrollbar { width: 4px; }
.form-panel::-webkit-scrollbar-thumb { background: #ddd; border-radius: 4px; }

.form-panel h2 {
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #aaa;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eee;
}

.form-section { margin-bottom: 22px; }

.form-section h3 {
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #bbb;
  margin-bottom: 10px;
}

.form-group { margin-bottom: 9px; }

label {
  display: block;
  font-size: 10px;
  color: #999;
  margin-bottom: 3px;
  letter-spacing: 0.4px;
}

input, textarea, select {
  width: 100%;
  border: 1px solid #e8e8e8;
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 12.5px;
  font-family: inherit;
  color: #222;
  background: #fafafa;
  transition: border-color 0.2s, background 0.2s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23999' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
  cursor: pointer;
}

input:focus, textarea:focus, select:focus {
  border-color: #b5c9b0;
  background: #fff;
}

textarea { resize: vertical; min-height: 56px; }

.item-row {
  background: #f9f9f9;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 11px;
  margin-bottom: 9px;
  position: relative;
}

.item-row .form-group { margin-bottom: 7px; }

.item-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.remove-item {
  position: absolute;
  top: 7px; right: 8px;
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 17px;
  line-height: 1;
  transition: color 0.2s;
}
.remove-item:hover { color: #e00; }

.btn-add-item {
  width: 100%;
  padding: 8px;
  border: 1px dashed #c5d4c0;
  background: none;
  border-radius: 6px;
  font-size: 11.5px;
  color: #7a9e75;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.btn-add-item:hover { background: #f0f5ef; border-color: #7a9e75; }

.btn-generate {
  width: 100%;
  padding: 13px;
  background: #2c2c2c;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 12px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 6px;
  font-family: inherit;
}
.btn-generate:hover { background: #444; }

/* ════════════════════════════════════
   PREVIEW PANEL
════════════════════════════════════ */
.preview-panel { flex: 1; min-width: 0; }

.preview-label {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #bbb;
  margin-bottom: 12px;
}

/* ════════════════════════════════════
   INVOICE DOCUMENT
════════════════════════════════════ */
.invoice-preview {
  background: #fff;
  width: 100%;
  max-width: 780px;
  padding: 56px 60px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.10);
  border-radius: 3px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  color: #1a1a1a;
}

.inv-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 44px;
}

.inv-title {
  font-size: 34px;
  font-weight: 700;
  color: #1a1a1a;
  line-height: 1;
  letter-spacing: -0.5px;
}

.inv-meta-table { border-collapse: collapse; }
.inv-meta-table td {
  padding: 3px 0;
  font-size: 13px;
  vertical-align: middle;
  white-space: nowrap;
}
.inv-meta-table .lbl { color: #888; text-align: left; padding-right: 32px; }
.inv-meta-table .val { color: #1a1a1a; text-align: right; font-weight: 400; min-width: 80px; }

.inv-parties {
  display: flex;
  justify-content: space-between;
  margin-bottom: 44px;
  gap: 40px;
}

.inv-party { flex: 1; }
.inv-party.right { text-align: right; }

.inv-party h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: #1a1a1a;
  margin-bottom: 10px;
}

.inv-party p {
  font-size: 13px;
  color: #444;
  line-height: 1.75;
}

.inv-table { width: 100%; border-collapse: collapse; }
.inv-table thead tr { background: #dde8d9; }
.inv-table th {
  padding: 11px 14px;
  font-size: 12.5px;
  font-weight: 400;
  color: #444;
  text-align: left;
}
.inv-table th.r, .inv-table td.r { text-align: right; }
.inv-table tbody tr { border-bottom: 1px solid #ebebeb; }
.inv-table td {
  padding: 15px 14px;
  font-size: 13px;
  color: #222;
  vertical-align: top;
}

.inv-total-row {
  display: flex;
  justify-content: space-between;
  padding: 13px 14px;
  font-size: 13.5px;
}
.inv-total-row.subtotal { background: #dde8d9; color: #333; }
.inv-total-row.grand {
  font-size: 17px;
  font-weight: 700;
  border-top: 1px solid #c8c8c8;
  color: #1a1a1a;
}

.inv-notes {
  margin-top: 36px;
  font-size: 11.5px;
  color: #888;
  border-top: 1px solid #eee;
  padding-top: 18px;
  line-height: 1.65;
}

@media (max-width: 960px) {
  .editor-wrapper { flex-direction: column; }
  .form-panel { width: 100%; position: static; max-height: none; }
  .invoice-preview { padding: 36px 28px; }
}

/* ════════════════════════════════════
   SAVED INVOICES BAR
════════════════════════════════════ */
.invoices-bar {
  width: 100%;
  max-width: 1320px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  margin-bottom: 20px;
  overflow: hidden;
}

.invoices-bar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  cursor: pointer;
  user-select: none;
}
.invoices-bar-header:hover { background: #fafafa; }

.invoices-bar-title {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #999;
  flex: 1;
}

.invoices-badge {
  background: #dde8d9;
  color: #4a7a45;
  font-size: 10px;
  font-family: Arial, sans-serif;
  border-radius: 10px;
  padding: 2px 8px;
  font-weight: 700;
}

.invoices-toggle-icon { font-size: 12px; color: #bbb; }

.invoices-list-wrap {
  border-top: 1px solid #f0f0f0;
  max-height: 280px;
  overflow-y: auto;
}

.invoices-empty {
  padding: 18px 20px;
  font-size: 12px;
  color: #bbb;
  font-family: Arial, sans-serif;
}

.invoice-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 20px;
  border-bottom: 1px solid #f5f5f5;
  gap: 12px;
}
.invoice-row:last-child { border-bottom: none; }
.invoice-row:hover { background: #fafafa; }

.invoice-row-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: Arial, sans-serif;
  font-size: 12.5px;
  flex: 1;
  min-width: 0;
}

.invoice-row-num       { font-weight: 700; color: #333; white-space: nowrap; }
.invoice-row-recipient { color: #555; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.invoice-row-date      { color: #aaa; white-space: nowrap; }
.invoice-row-total     { color: #2c2c2c; font-weight: 600; white-space: nowrap; }

.invoice-row-actions { display: flex; gap: 8px; flex-shrink: 0; }

.btn-load-inv {
  padding: 5px 14px;
  border: 1px solid #c5d4c0;
  background: none;
  border-radius: 5px;
  font-size: 11px;
  color: #5a8a56;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.btn-load-inv:hover { background: #f0f5ef; border-color: #7a9e75; }

.btn-del-inv {
  padding: 5px 12px;
  border: 1px solid #f0d0d0;
  background: none;
  border-radius: 5px;
  font-size: 11px;
  color: #c0392b;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.btn-del-inv:hover { background: #fff5f5; border-color: #e07070; }

.btn-save {
  width: 100%;
  padding: 13px;
  background: #fff;
  color: #2c2c2c;
  border: 1.5px solid #2c2c2c;
  border-radius: 8px;
  font-size: 12px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 6px;
  font-family: inherit;
}
.btn-save:hover { background: #f5f5f5; }
.btn-save:disabled { opacity: 0.6; cursor: not-allowed; }

/* ════════════════════════════════════
   A4 PRINT
════════════════════════════════════ */
@media print {
  @page { size: A4 portrait; margin: 0; }
  * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }
  body { background: #fff !important; padding: 0 !important; display: block !important; }
  #login-screen, .top-bar, .form-panel, .preview-label { display: none !important; }
  .editor-wrapper { display: block !important; max-width: 100% !important; }
  .preview-panel  { display: block !important; width: 100% !important; }
  .invoice-preview {
    width: 210mm !important; min-height: 297mm !important;
    padding: 18mm 20mm !important; box-shadow: none !important;
    border-radius: 0 !important; max-width: 100% !important;
    margin: 0 !important; page-break-after: always;
  }
}