:root {
  --bg: #0e0e11;
  --surface: #18181c;
  --surface-raised: #1f1f24;
  --border: #2a2a30;
  --border-subtle: #222228;
  --text: #e8e6e3;
  --text-secondary: #8a8a8f;
  --text-muted: #5a5a60;
  --amber: #3dabc7;
  --amber-dim: #2e8fa8;
  --amber-glow: rgba(61, 171, 199, 0.12);
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, 0.1);
  --green-badge: rgba(52, 211, 153, 0.15);
  --red: #f87171;
  --red-dim: rgba(248, 113, 113, 0.1);
  --row-hover: rgba(61, 171, 199, 0.04);
  --font: 'DM Sans', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;
  --radius: 8px;
  --radius-sm: 5px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.header-divider {
  width: 1px;
  height: 18px;
  background: var(--border);
}

.header-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.stats {
  display: flex;
  gap: 1.25rem;
}

.stat {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.stat-value {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--amber);
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.last-updated {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── Main ── */
.main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 3rem;
}

/* ── Filters ── */
.filters {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

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

.filter-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 500;
}

.input-wrap {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.input-prefix {
  padding: 0 0 0 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--mono);
  user-select: none;
}

.input-wrap input {
  border: none;
  background: transparent;
  padding: 0.45rem 0.6rem 0.45rem 0.3rem;
  width: 90px;
}

input[type="number"],
input[type="date"] {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.6rem;
  outline: none;
  transition: border-color 0.15s;
}

.input-wrap input[type="number"] {
  border: none;
  background: transparent;
  border-radius: 0;
}

input:focus {
  border-color: var(--amber-dim);
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.6);
  cursor: pointer;
}

.filter-btn {
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--amber);
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.filter-btn:hover {
  background: var(--amber-dim);
}

.filter-btn:active {
  transform: scale(0.97);
}

/* ── Refresh Bar ── */
.refresh-bar {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.refresh-bar .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── Search Bar ── */
.search-bar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 0.75rem;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.search-bar svg {
  flex-shrink: 0;
  color: var(--text-muted);
}

.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  padding: 0.55rem 0;
  outline: none;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-bar:focus-within {
  border-color: var(--amber-dim);
}

/* ── Table ── */
.table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-area {
  overflow-x: auto;
}

.table-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
}

thead th {
  text-align: left;
  padding: 0.6rem 0.85rem;
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  white-space: nowrap;
  user-select: none;
}

thead th:last-child {
  text-align: right;
}

tbody tr {
  cursor: pointer;
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.12s;
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--row-hover);
}

tbody td {
  padding: 0.6rem 0.85rem;
  white-space: nowrap;
  vertical-align: middle;
}

tbody td:last-child {
  text-align: right;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.82rem;
}

/* Conf ID column */
td:first-child {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Email column */
td:nth-child(3) {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Dates column */
td:nth-child(5) {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* ── Row States ── */
tr.row-loading {
  pointer-events: none;
}

tr.row-loading td {
  opacity: 0.5;
}

tr.row-loading td:first-child::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 0.5rem;
  vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

tr.row-invoiced {
  background: var(--green-dim);
}

tr.row-invoiced:hover {
  background: rgba(52, 211, 153, 0.06);
}

.sent-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--green);
  background: var(--green-badge);
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.sent-badge svg {
  flex-shrink: 0;
}

/* ── No Email Tag ── */
.no-email-tag {
  display: inline-block;
  font-size: 0.63rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

/* ── Modal Email Input ── */
.modal-email-input {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.55rem;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}

.modal-email-input:focus {
  border-color: var(--amber-dim);
}

.modal-email-input::placeholder {
  color: var(--text-muted);
}

/* ── Nav Link ── */
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.nav-link:hover {
  color: var(--amber);
  border-color: var(--amber-dim);
  background: var(--amber-glow);
}

/* ── Invoice Page ── */
.invoice-table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.invoice-table-area {
  overflow-x: auto;
}

.invoice-table-area table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
}

.invoice-table-area thead th {
  text-align: left;
  padding: 0.6rem 0.85rem;
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.invoice-table-area tbody tr {
  border-bottom: 1px solid var(--border-subtle);
}

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

.invoice-table-area tbody td {
  padding: 0.6rem 0.85rem;
  white-space: nowrap;
  vertical-align: middle;
}

.invoice-table-area td:first-child {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.invoice-table-area td:nth-child(3) {
  font-family: var(--mono);
  font-size: 0.82rem;
}

.status-badge {
  display: inline-block;
  font-size: 0.63rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
}

.status-badge.status-open {
  color: var(--amber);
  background: var(--amber-glow);
}

.status-badge.status-paid,
.status-badge.status-recorded {
  color: var(--green);
  background: var(--green-badge);
}

.status-badge.status-void,
.status-badge.status-uncollectible {
  color: var(--red);
  background: var(--red-dim);
}

.void-btn {
  font-family: var(--font);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--red);
  background: var(--red-dim);
  border: 1px solid transparent;
  border-radius: 3px;
  padding: 0.2rem 0.55rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.void-btn:hover {
  background: rgba(248, 113, 113, 0.2);
  border-color: var(--red);
}

.void-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  transform: translateY(8px);
  transition: transform 0.2s;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.modal-close:hover {
  color: var(--text);
  background: var(--surface);
}

.modal-body {
  padding: 1.25rem;
}

.modal-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.35rem 0;
}

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

.modal-detail-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 500;
  flex-shrink: 0;
  width: 70px;
}

.modal-detail-value {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
  text-align: right;
}

.modal-due-date {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.modal-due-date label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.modal-due-date input[type="date"] {
  width: 100%;
}

.modal-warning {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(61, 171, 199, 0.1);
  border: 1px solid rgba(61, 171, 199, 0.25);
  color: var(--amber);
  font-size: 0.78rem;
  line-height: 1.4;
}

.btn-warning {
  background: var(--amber) !important;
  color: #000 !important;
  border-color: var(--amber) !important;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border);
}

.modal-btn {
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.modal-btn:active {
  transform: scale(0.97);
}

.modal-btn-cancel {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.modal-btn-cancel:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.modal-btn-primary {
  background: var(--amber);
  border: none;
  color: var(--bg);
  text-transform: uppercase;
}

.modal-btn-primary:hover {
  background: var(--amber-dim);
}

.modal-btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Toast ── */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  color: var(--text);
  font-size: 0.82rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  pointer-events: auto;
  animation: toastIn 0.25s ease-out forwards;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast.toast-error {
  border-left-color: var(--red);
}

.toast-icon {
  flex-shrink: 0;
  color: var(--green);
}

.toast.toast-error .toast-icon {
  color: var(--red);
}

.toast.leaving {
  animation: toastOut 0.2s ease-in forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}

/* ── Loader ── */
.loader {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── Voided Section ── */
.voided-section {
  margin-top: 0.75rem;
}

.voided-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem 0;
  transition: color 0.15s;
}

.voided-toggle:hover {
  color: var(--text-secondary);
}

.voided-toggle svg {
  transition: transform 0.2s;
}

.voided-section.expanded .voided-toggle svg {
  transform: rotate(180deg);
}

.voided-table-wrap {
  display: none;
  margin-top: 0.4rem;
}

.voided-section.expanded .voided-table-wrap {
  display: block;
}

.voided-table-wrap .invoice-table-container {
  opacity: 0.7;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
  }

  .main {
    padding: 1rem;
  }

  .filters {
    flex-wrap: wrap;
  }

  table {
    font-size: 0.78rem;
  }

  td, th {
    padding: 0.5rem 0.6rem;
  }
}