/* ─── Invoice App — Light Minimal Theme ─────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #F8F7F4;
  --surface: #FFFFFF;
  --surface-alt: #F1F0EC;
  --border: #E2E0DA;
  --border-focus: #1A1A1A;
  --text: #1A1A1A;
  --text-secondary: #6B6860;
  --text-muted: #9B978F;
  --accent: #1A1A1A;
  --accent-hover: #333333;
  --accent-soft: #F1F0EC;
  --danger: #C0392B;
  --danger-soft: #FDEDEB;
  --success: #27AE60;
  --success-soft: #E8F8EE;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --font: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── Layout ───────────────────────────────────────────────── */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.logo span {
  color: var(--text-muted);
  font-weight: 400;
}

.header-nav {
  display: flex;
  gap: 0.4rem;
}

.header-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
  background: var(--accent);
  color: #fff;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* ─── Home Page ────────────────────────────────────────────── */
.home-hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
}

.home-hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 0.5rem;
}

.home-hero p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 400px;
  margin: 0 auto;
}

.company-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.company-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.company-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.company-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.company-card:hover::before {
  transform: scaleX(1);
}

.company-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

.company-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.company-card .card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
}

.company-card .card-arrow svg {
  transition: transform var(--transition);
}

.company-card:hover .card-arrow svg {
  transform: translateX(4px);
}

/* ─── Forms ────────────────────────────────────────────────── */
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.form-card-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.form-grid.three-col {
  grid-template-columns: 1fr 1fr 1fr;
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-grid.three-col {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

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

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group label .required {
  color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font);
  font-size: 0.9rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  transition: all var(--transition);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(26,26,26,0.06);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 70px;
}

/* ─── Items Table ──────────────────────────────────────────── */
.items-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.items-table thead {
  background: var(--surface-alt);
}

.items-table th {
  text-align: left;
  padding: 0.6rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

.items-table td {
  padding: 0.5rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.items-table td input {
  font-family: var(--font);
  font-size: 0.88rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 100%;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
}

.items-table td input:focus {
  border-color: var(--border-focus);
}

.items-table .col-desc { min-width: 200px; }
.items-table .col-qty { width: 80px; }
.items-table .col-rate { width: 110px; }
.items-table .col-amount { width: 110px; }
.items-table .col-action { width: 44px; text-align: center; }

.items-table .amount-display {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text);
  padding: 0.45rem 0.55rem;
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-alt);
  border-color: var(--border-focus);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid transparent;
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-ghost {
  background: none;
  color: var(--text-secondary);
  padding: 0.4rem;
  border-radius: 50%;
}

.btn-ghost:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-sm {
  font-size: 0.78rem;
  padding: 0.35rem 0.7rem;
}

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

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ─── Totals ───────────────────────────────────────────────── */
.totals-section {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

.totals-grid {
  width: 100%;
  max-width: 320px;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  font-size: 0.9rem;
}

.totals-row + .totals-row {
  border-top: 1px solid var(--border);
}

.totals-row.total-final {
  font-weight: 700;
  font-size: 1.05rem;
  border-top: 2px solid var(--accent);
  padding-top: 0.7rem;
  margin-top: 0.25rem;
}

.totals-row .label {
  color: var(--text-secondary);
}

.totals-row .value {
  font-family: var(--mono);
  font-weight: 500;
}

.totals-row.total-final .value {
  font-weight: 700;
}

.gst-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.gst-input-wrap input {
  width: 60px;
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.25rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: right;
  outline: none;
}

.gst-input-wrap input:focus {
  border-color: var(--border-focus);
}

/* ─── Invoice List ─────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.filter-bar input,
.filter-bar select {
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  outline: none;
  flex: 1;
  min-width: 150px;
}

.filter-bar select {
  flex: 0 0 auto;
  min-width: 180px;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.invoice-table thead {
  background: var(--surface-alt);
}

.invoice-table th {
  text-align: left;
  padding: 0.65rem 0.8rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.invoice-table td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border);
}

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

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

.invoice-number {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.82rem;
}

.amount-cell {
  font-family: var(--mono);
  font-weight: 500;
}

.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 99px;
  letter-spacing: 0.03em;
}

.badge-hod {
  background: #EBF0FF;
  color: #2952CC;
}

.badge-bbb {
  background: #FFF5EB;
  color: #CC7A29;
}

/* ─── Pagination ───────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.3rem;
  margin-top: 1.5rem;
}

.pagination a {
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}

.pagination a:hover,
.pagination a.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ─── Empty State ──────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: 1rem;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}

.empty-state p {
  font-size: 0.85rem;
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .home-hero h1 { font-size: 1.6rem; }
  .container { padding: 1rem 0.9rem 2rem; }
  .form-card { padding: 1.1rem; }
  .invoice-table { font-size: 0.8rem; }
  .invoice-table th, .invoice-table td { padding: 0.5rem 0.55rem; }
  .hide-mobile { display: none; }
  .header-inner { flex-direction: row; }
  .totals-grid { max-width: 100%; }
}

/* ─── Action bar ───────────────────────────────────────────── */
.action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ─── Toast ────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.error {
  background: var(--danger);
}

/* ─── Animations ───────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.fade-in:nth-child(2) { animation-delay: 0.06s; }
.fade-in:nth-child(3) { animation-delay: 0.12s; }