/* PayHub — white / clean / minimal / monochrome + sidebar */

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-muted: #f4f4f5;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --text: #111111;
  --text-secondary: #71717a;
  --text-muted: #a1a1aa;
  --accent: #111111;
  --accent-hover: #000000;
  --danger: #111111;
  --sidebar-w: 220px;
  --radius: 6px;
  --shadow: none;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code,
pre,
.mono {
  font-family: var(--mono);
  font-size: 12.5px;
}

code {
  background: var(--bg-muted);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  word-break: break-all;
}

pre {
  margin: 0;
  padding: 12px 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  max-height: 320px;
  white-space: pre-wrap;
  word-break: break-word;
}

pre code {
  background: none;
  padding: 0;
}

img {
  max-width: 100%;
  height: auto;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* —— App shell —— */
.app {
  min-height: 100vh;
  display: flex;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-subtle);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 40;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 18px 16px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand a {
  color: var(--text);
  text-decoration: none;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 13.5px;
  text-decoration: none;
}

.sidebar-nav a:hover {
  background: var(--bg-muted);
  color: var(--text);
  text-decoration: none;
}

.sidebar-nav a.is-active {
  background: var(--bg);
  color: var(--text);
  font-weight: 500;
  border: 1px solid var(--border);
}

.sidebar-footer {
  padding: 12px 10px 16px;
  border-top: 1px solid var(--border);
}

.sidebar-footer form {
  margin: 0;
}

.app-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 30;
}

.app-content {
  flex: 1;
  padding: 28px 32px 48px;
  max-width: 1100px;
  width: 100%;
}

.menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1;
  color: var(--text);
}

.sidebar-backdrop {
  display: none;
}

/* —— Page header —— */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.page-title {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-sub {
  margin: 4px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
}

.page-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: var(--text-muted);
}

.breadcrumb .current {
  color: var(--text);
}

/* —— Cards / sections —— */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}

.card-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.card-title-lg {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-transform: none;
  letter-spacing: -0.01em;
}

/* —— Stats —— */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: var(--bg);
}

.stat-label {
  margin: 0;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  margin: 6px 0 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

/* —— Grid helpers —— */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.grid-main-side {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 16px;
}

.grid-form-3 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr;
  gap: 16px;
  align-items: start;
}

/* —— Tables —— */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  background: var(--bg);
}

table.table th,
table.table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

table.table th {
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  white-space: nowrap;
}

table.table tr:last-child td {
  border-bottom: 0;
}

table.table tbody tr:hover td {
  background: var(--bg-subtle);
}

table.table td.num,
table.table th.num {
  font-variant-numeric: tabular-nums;
  text-align: right;
}

table.table .col-id {
  min-width: 220px;
}

table.table .col-id code {
  white-space: nowrap;
  word-break: normal;
}

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

table.kv th,
table.kv td {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  text-align: left;
  vertical-align: top;
}

table.kv th {
  width: 140px;
  color: var(--text-secondary);
  font-weight: 500;
}

table.kv tr:last-child th,
table.kv tr:last-child td {
  border-bottom: 0;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  font-size: 13.5px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

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

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

.btn-ghost {
  background: var(--bg);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--bg-muted);
}

.btn-danger {
  background: var(--bg);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-danger:hover {
  background: var(--bg-muted);
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12.5px;
}

.btn-block {
  width: 100%;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

/* —— Forms —— */
.field {
  margin-bottom: 14px;
}

.field:last-child {
  margin-bottom: 0;
}

.field label,
.label {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.help {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

input.input,
select.input,
textarea.input {
  width: 100%;
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  outline: none;
}

input.input:focus,
select.input:focus,
textarea.input:focus {
  border-color: var(--text);
  box-shadow: 0 0 0 1px var(--text);
}

input.input[readonly] {
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M3 4.5L6 8l3-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  cursor: pointer;
  margin-bottom: 8px;
}

.checkbox input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: #111;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
}

.filter-bar .input,
.filter-bar select.input {
  width: auto;
  min-width: 120px;
}

/* —— Tabs (underline) —— */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin: 0 0 20px;
  overflow-x: auto;
}

.tabs a {
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  text-decoration: none;
  white-space: nowrap;
}

.tabs a:hover {
  color: var(--text);
  text-decoration: none;
}

.tabs a.is-active {
  color: var(--text);
  font-weight: 500;
  border-bottom-color: var(--text);
}

/* —— Badges —— */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.badge-paid::before,
.badge-success::before {
  background: #16a34a;
}

.badge-paid,
.badge-success {
  color: var(--text);
  border-color: #bbf7d0;
  background: #f0fdf4;
}

.badge-pending::before,
.badge-processing::before {
  background: #ca8a04;
}

.badge-pending,
.badge-processing {
  color: var(--text);
  border-color: #fde68a;
  background: #fefce8;
}

.badge-failed::before,
.badge-invalid::before {
  background: #dc2626;
}

.badge-failed,
.badge-invalid {
  color: var(--text);
  border-color: #fecaca;
  background: #fef2f2;
}

.badge-expired::before,
.badge-cancelled::before {
  background: #71717a;
}

.badge-ok::before {
  background: #16a34a;
}

.badge-warn::before {
  background: #ca8a04;
}

.badge-muted::before {
  background: #a1a1aa;
}

/* —— Alerts —— */
.alert {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 13.5px;
  background: var(--bg-subtle);
}

.alert-error {
  background: #fef2f2;
  border-color: #fecaca;
}

.alert-warning {
  background: #fefce8;
  border-color: #fde68a;
}

.alert-success {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

/* —— Pagination —— */
.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.pagination a {
  color: var(--text);
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
}

.pagination a:hover {
  background: var(--bg-muted);
  text-decoration: none;
}

/* —— Lists —— */
.list-plain {
  margin: 0;
  padding-left: 18px;
  color: var(--text-secondary);
}

.list-plain li {
  margin-bottom: 4px;
}

.muted {
  color: var(--text-secondary);
}

.muted-sm {
  color: var(--text-secondary);
  font-size: 12.5px;
}

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 24px; }

/* —— Login —— */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg-subtle);
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 28px 24px;
}

.login-brand {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-align: center;
}

.login-sub {
  margin: 6px 0 22px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

/* —— Empty —— */
.empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--text-secondary);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* —— Gateway rows —— */
.gw-row {
  display: grid;
  grid-template-columns: 1fr 80px;
  gap: 10px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.gw-row:last-of-type {
  border-bottom: 0;
}

/* —— Mobile —— */
@media (max-width: 900px) {
  .grid-2,
  .grid-3,
  .grid-main-side,
  .grid-form-3 {
    grid-template-columns: 1fr;
  }

  .app-content {
    padding: 20px 16px 40px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
  }

  .app-topbar {
    display: flex;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.15s ease;
    box-shadow: none;
  }

  body.nav-open .sidebar {
    transform: translateX(0);
  }

  body.nav-open .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 35;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }
}