:root {
  --brand-black: #111111;
  --brand-yellow: #f4c400;
  --brand-yellow-dark: #d1a700;
  --bg-page: #f2f4f7;
  --bg-surface: #ffffff;
  --bg-muted: #f8fafc;
  --border-soft: #dde3ea;
  --text-main: #111827;
  --text-muted: #5b6472;
  --danger: #c0392b;
  --danger-soft: #fef2f2;
  --success: #1f8b4c;
  --success-soft: #e9f7ef;
  --warning: #f59e0b;
  --warning-soft: #fff7e3;
  --info: #2563eb;
  --info-soft: #eff6ff;
  --shadow-card: 0 10px 26px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Nunito Sans", Arial, Helvetica, sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at top, #fafbfc 0%, var(--bg-page) 48%);
}

a {
  color: inherit;
}

.site-header {
  background: linear-gradient(90deg, #0f172a 0%, #0b1221 100%);
  color: #f9fafb;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
  border-bottom: 2px solid rgba(244, 196, 0, 0.7);
}

.site-header img {
  height: 64px;
  width: auto;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.site-header h1 {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.15;
}

.header-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.header-actions button,
button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.header-actions button,
.btn-primary {
  background: var(--brand-yellow);
  border-color: #e6bc00;
  color: #111827;
}

.header-actions button:hover,
.btn-primary:hover {
  background: var(--brand-yellow-dark);
}

.btn-secondary {
  background: #1f2937;
  border-color: #111827;
  color: #f9fafb;
}

.btn-secondary:hover {
  background: #111827;
}

.btn-danger {
  background: var(--danger);
  border-color: #9f251b;
  color: #ffffff;
}

.btn-danger:hover {
  background: #a92f22;
}

.btn-ghost {
  background: #ffffff;
  border-color: var(--border-soft);
  color: #1f2937;
}

.btn-ghost:hover {
  background: #f8fafc;
}

.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 22px;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  padding: 18px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: clamp(18px, 1.8vw, 24px);
  line-height: 1.15;
}

.card-subtitle {
  margin: -6px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 700;
}

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.quick-search {
  width: min(100%, 320px);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  background: #ffffff;
  padding: 9px 11px;
  font-size: 14px;
}

label {
  font-size: 14px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 9px 11px;
  font-size: 14px;
  color: var(--text-main);
  background: #ffffff;
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: #1d4ed8;
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

th,
td {
  border: 1px solid var(--border-soft);
  padding: 8px 9px;
  font-size: 14px;
  text-align: left;
  vertical-align: middle;
}

th {
  background: #fef8d9;
  color: #293140;
  font-weight: 800;
}

tbody tr:nth-child(even) {
  background: #fbfdff;
}

.status-message {
  min-height: 20px;
  margin: 4px 0 0;
  font-size: 13px;
  font-weight: 800;
  color: var(--info);
}

.status-message.is-success {
  color: var(--success);
}

.status-message.is-error {
  color: var(--danger);
}

.status-message.is-warning {
  color: #a16207;
}

.helper,
.muted-text {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 700;
}

.empty-state {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 800;
}

.hidden {
  display: none !important;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.1;
  white-space: nowrap;
}

.status-chip--paid {
  background: var(--success-soft);
  border-color: rgba(31, 139, 76, 0.24);
  color: #166534;
}

.status-chip--pending {
  background: var(--warning-soft);
  border-color: rgba(245, 158, 11, 0.3);
  color: #9a6700;
}

.status-chip--unpaid {
  background: var(--danger-soft);
  border-color: rgba(192, 57, 43, 0.28);
  color: #a0281f;
}

.status-chip--partial {
  background: var(--info-soft);
  border-color: rgba(37, 99, 235, 0.25);
  color: #1d4ed8;
}

.toast-stack {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: min(360px, calc(100vw - 32px));
  display: grid;
  gap: 8px;
  z-index: 5000;
}

.toast {
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.14);
  padding: 11px 12px;
  font-size: 13px;
  font-weight: 800;
  color: #111827;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

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

.toast.info {
  border-left: 4px solid var(--info);
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

@media (max-width: 980px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    margin-left: 0;
  }

  .container {
    padding: 16px;
  }
}