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

:root {
    --color-bg:        #0f1117;
    --color-surface:   #1a1d27;
    --color-surface2:  #20243a;
    --color-border:    #2a2d3e;
    --color-primary:   #6c63ff;
    --color-primary-h: #5a52e0;
    --color-success:   #22c55e;
    --color-danger:    #ef4444;
    --color-warning:   #f59e0b;
    --color-info:      #38bdf8;
    --color-text:      #e2e8f0;
    --color-muted:     #8892a4;
    --sidebar-w:       240px;
    --header-h:        60px;
    --radius:          10px;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.6;
}

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

/* ── Layout ── */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-brand {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--color-border);
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-brand svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--color-muted);
    font-size: 14px;
    font-weight: 500;
    transition: color .2s, background .2s;
    text-decoration: none;
}

.sidebar-link:hover,
.sidebar-link.active {
    color: var(--color-text);
    background: rgba(108,99,255,.1);
    text-decoration: none;
}

.sidebar-link.active {
    color: var(--color-primary);
    border-right: 3px solid var(--color-primary);
}

.sidebar-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
    font-size: 12px;
    color: var(--color-muted);
}

.sidebar-footer a {
    color: var(--color-danger);
}

/* Main content */
.main {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    height: var(--header-h);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 50;
}

.page-content {
    padding: 28px;
    flex: 1;
}

/* Stats cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
}

.stat-label {
    font-size: 12px;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.stat-sub {
    font-size: 12px;
    color: var(--color-muted);
    margin-top: 4px;
}

/* Table */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: 20px;
}

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

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

th {
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    padding: 10px 16px;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    vertical-align: middle;
}

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

tbody tr:hover td {
    background: rgba(255,255,255,.02);
}

.td-mono {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
    color: var(--color-muted);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-new      { background: rgba(139,148,158,.15); color: #8b949e; }
.badge-pending  { background: rgba(245,158,11,.15);  color: var(--color-warning); }
.badge-paid     { background: rgba(34,197,94,.15);   color: var(--color-success); }
.badge-failed   { background: rgba(239,68,68,.15);   color: var(--color-danger); }
.badge-expired  { background: rgba(139,148,158,.15); color: #8b949e; }
.badge-yes      { background: rgba(34,197,94,.15);   color: var(--color-success); }
.badge-no       { background: rgba(239,68,68,.15);   color: var(--color-danger); }

/* Filters bar */
.filters {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-group label {
    font-size: 11px;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}

.form-control {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    padding: 8px 12px;
    font-size: 13px;
    min-width: 140px;
    outline: none;
    transition: border-color .2s;
}

.form-control:focus {
    border-color: var(--color-primary);
}

.btn {
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity .2s;
}

.btn:hover { opacity: .85; }

.btn-primary  { background: var(--color-primary); color: #fff; }
.btn-outline  { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-sm       { padding: 5px 12px; font-size: 12px; }
.btn-danger   { background: var(--color-danger); color: #fff; }

/* Pagination */
.pagination {
    display: flex;
    gap: 6px;
    margin-top: 16px;
    align-items: center;
}

.page-btn {
    padding: 6px 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
}

.page-btn:hover { border-color: var(--color-primary); text-decoration: none; }
.page-btn.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }

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

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 380px;
}

.login-title {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
    text-align: center;
}

.login-sub {
    color: var(--color-muted);
    font-size: 13px;
    text-align: center;
    margin-bottom: 28px;
}

.login-card .form-group {
    margin-bottom: 16px;
}

.login-card label {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 6px;
}

.login-card .form-control {
    width: 100%;
    padding: 11px 14px;
    font-size: 14px;
}

.login-card .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    margin-top: 4px;
}

.alert {
    padding: 11px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-danger {
    background: rgba(239,68,68,.12);
    border: 1px solid rgba(239,68,68,.3);
    color: var(--color-danger);
}

/* Detail page */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 768px) {
    .detail-grid { grid-template-columns: 1fr; }
}

.detail-row {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.detail-row:last-child { border-bottom: none; }

.detail-key {
    font-size: 11px;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}

.detail-val {
    font-size: 14px;
    color: var(--color-text);
    word-break: break-all;
}

pre {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 12px;
    font-size: 12px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--color-muted);
}