:root {
  --color-primary: #0f1535;
  --color-primary-mid: #1a2547;
  --color-accent: #5b8ef5;
  --color-accent-light: #6b9cf6;
  --color-body-bg: #f0f2f7;
  --color-card-bg: #fff;
  --color-slate-50: #f8fafc;
  --color-slate-100: #f1f5f9;
  --color-slate-200: #e2e8f0;
  --color-slate-300: #cbd5e1;
  --color-slate-400: #94a3b8;
  --color-slate-500: #64748b;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1e293b;
  --font-display: "Sora", sans-serif;
  --font-body: "DM Sans", sans-serif;
}

/* ── Themes ──────────────────────────────────────────────────── */

[data-theme="navy"] {
  --color-primary: #0f1535;
  --color-primary-mid: #1a2547;
  --color-accent: #5b8ef5;
  --color-accent-light: #6b9cf6;
  --color-body-bg: #f0f2f7;
}

[data-theme="emerald"] {
  --color-primary: #062e1e;
  --color-primary-mid: #0d3b29;
  --color-accent: #34d399;
  --color-accent-light: #6ee7b7;
  --color-body-bg: #ecfdf5;
}

[data-theme="sunset"] {
  --color-primary: #431407;
  --color-primary-mid: #5c1d0e;
  --color-accent: #f59e0b;
  --color-accent-light: #fbbf24;
  --color-body-bg: #fffbeb;
}

[data-theme="rose"] {
  --color-primary: #2d0a1e;
  --color-primary-mid: #3d1029;
  --color-accent: #f472b6;
  --color-accent-light: #f9a8d4;
  --color-body-bg: #fdf2f8;
}

[data-theme="slate"] {
  --color-primary: #1e293b;
  --color-primary-mid: #334155;
  --color-accent: #94a3b8;
  --color-accent-light: #cbd5e1;
  --color-body-bg: #f1f5f9;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--color-body-bg);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 3rem 1rem;
}

/* ── Action Buttons ─────────────────────────────────────────── */

#action-btns {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.875rem 1.25rem;
  border-radius: 0.75rem;
  border: none;
  box-shadow: 0 20px 25px -5px rgba(148, 163, 184, 0.3);
  transition: all 0.2s;
  cursor: pointer;
}

.action-btn:hover {
  transform: scale(1.05);
}

.action-btn--reset {
  background: var(--color-slate-600);
}

.action-btn--reset:hover {
  background: var(--color-slate-700);
}

.action-btn--download {
  background: var(--color-primary);
}

.action-btn--download:hover {
  background: var(--color-primary-mid);
  box-shadow: 0 25px 50px -12px rgba(91, 142, 245, 0.2);
}

.action-btn svg {
  width: 1rem;
  height: 1rem;
}

.action-btn--download svg {
  color: var(--color-accent);
}

/* ── Invoice Card ───────────────────────────────────────────── */

.invoice-card {
  background: #fff;
  width: 100%;
  max-width: 48rem;
  box-shadow: 0 25px 50px -12px rgba(203, 213, 225, 0.6);
  border-radius: 0.75rem;
  overflow: hidden;
}

/* ── Header ─────────────────────────────────────────────────── */

.invoice-header {
  background: var(--color-primary);
  padding: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-left: 4px solid var(--color-accent);
}

.invoice-title {
  font-family: var(--font-display);
  color: #fff;
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1;
}

.invoice-number {
  color: var(--color-slate-400);
  margin-top: 0.5rem;
  font-size: 0.875rem;
  font-family: var(--font-display);
}

.header-from {
  margin-top: 1.5rem;
}

.header-label {
  color: var(--color-slate-400);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  font-family: var(--font-display);
}

.header-name {
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-top: 0.25rem;
}

.header-address {
  color: var(--color-slate-400);
  font-size: 0.875rem;
  margin-top: 0.125rem;
}

.header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1.25rem;
}

/* ── Date Box ───────────────────────────────────────────────── */

.date-box {
  background: var(--color-primary-mid);
  border-radius: 0.75rem;
  padding: 1rem 1.5rem;
  text-align: right;
}

.date-display {
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  margin-top: 0.25rem;
  cursor: pointer;
}

.date-input-hidden {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* ── Bill To ────────────────────────────────────────────────── */

.bill-to {
  text-align: right;
}

/* ── Table ──────────────────────────────────────────────────── */

.invoice-content {
  padding: 2.5rem;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
}

.invoice-table thead tr {
  background: var(--color-accent);
}

.invoice-table th {
  font-family: var(--font-display);
  color: #fff;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  padding: 0.875rem 1.25rem;
}

.invoice-table th:first-child {
  text-align: left;
  border-radius: 0.5rem 0 0 0.5rem;
}

.invoice-table th:nth-child(2) {
  text-align: right;
}

.invoice-table th:last-child {
  text-align: center;
  border-radius: 0 0.5rem 0.5rem 0;
  width: 2.5rem;
}

.line-item {
  border-bottom: 1px solid var(--color-slate-100);
}

.line-item td {
  padding: 1.5rem 1.25rem;
  font-size: 0.875rem;
  color: var(--color-slate-700);
}

.line-item td[data-field="amount"] {
  text-align: right;
}

.line-item td:last-child {
  text-align: center;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.remove-row {
  background: none;
  border: none;
  color: var(--color-slate-300);
  cursor: pointer;
  transition: color 0.2s;
}

.remove-row:hover {
  color: #ef4444;
}

.remove-row svg {
  width: 1rem;
  height: 1rem;
}

/* ── Add Row ────────────────────────────────────────────────── */

.add-row-wrap {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
}

#addRowBtn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--color-accent);
  font-size: 0.875rem;
  font-family: var(--font-display);
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
}

#addRowBtn:hover {
  color: var(--color-accent-light);
}

#addRowBtn svg {
  width: 1rem;
  height: 1rem;
}

/* ── Totals ─────────────────────────────────────────────────── */

.totals {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.totals-row {
  width: 18rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--color-slate-400);
}

.totals-row span:last-child {
  color: var(--color-slate-600);
  text-align: right;
}

.totals-total {
  border-top: 1px solid var(--color-slate-200);
  width: 18rem;
  margin-top: 0.5rem;
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.totals-total-label {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-slate-800);
  font-size: 1rem;
}

.totals-total-value {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent);
  font-size: 1.25rem;
}

/* ── Note ───────────────────────────────────────────────────── */

.invoice-note {
  margin-top: 2.5rem;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-100);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
}

.invoice-note-title {
  font-family: var(--font-display);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.invoice-note-text {
  color: var(--color-slate-500);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* ── Footer ─────────────────────────────────────────────────── */

.invoice-footer {
  padding: 1.5rem 2.5rem;
  border-top: 1px solid var(--color-slate-100);
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.footer-contact {
  color: var(--color-slate-400);
  font-size: 0.75rem;
}

.footer-notice {
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-display);
}

/* ── Theme Picker ───────────────────────────────────────────── */

#theme-picker {
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 50;
  display: flex;
  gap: 0.5rem;
}

.theme-swatch {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition:
    transform 0.2s,
    border-color 0.2s;
}

.theme-swatch:hover {
  transform: scale(1.15);
}

.theme-swatch.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.theme-swatch span {
  display: block;
  flex: 1;
}

/* ── Print ──────────────────────────────────────────────────── */

@media print {
  @page {
    margin: 0;
  }

  #action-btns,
  #theme-picker {
    display: none !important;
  }

  .no-print {
    display: none !important;
  }

  body {
    background: white !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .invoice-card {
    box-shadow: none !important;
    border-radius: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    min-height: 100vh !important;
    display: flex !important;
    flex-direction: column !important;
  }

  .invoice-content {
    flex: 1 !important;
  }

  .invoice-footer {
    margin-top: auto !important;
  }

  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
}