/* ═══════════════════════════════════════════════════════════════════════════
   CUSTOMER PORTAL — DESIGN SYSTEM
   Theme: Professional Light · Clean sidebar · Crisp typography
   Fonts: Inter (UI) + JetBrains Mono (codes/refs)
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Variables ────────────────────────────────────────────────────────────── */
:root {
  --col-bg:           #f4f6f9;
  --col-bg-elevated:  #f9fafb;
  --col-bg-card:      #ffffff;
  --col-bg-input:     #ffffff;
  --col-border:       #e2e6ed;
  --col-border-soft:  #edf0f5;
  --col-text:         #111827;
  --col-text-muted:   #6b7280;
  --col-text-faint:   #9ca3af;
  --col-accent:       #2563eb;
  --col-accent-hover: #1d4ed8;
  --col-accent-dim:   rgba(37,99,235,0.08);
  --col-success:      #059669;
  --col-success-dim:  rgba(5,150,105,0.08);
  --col-warning:      #d97706;
  --col-warning-dim:  rgba(217,119,6,0.08);
  --col-danger:       #dc2626;
  --col-danger-dim:   rgba(220,38,38,0.08);
  --col-info:         #2563eb;
  --sidebar-width:    240px;
  --sidebar-bg:       #1e293b;
  --sidebar-border:   #293548;
  --font-ui:    'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Cascadia Code', monospace;
  --radius-sm:  4px;
  --radius-md:  6px;
  --radius-lg:  10px;
  --radius-xl:  14px;
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 20px 40px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.06);
  --transition: 150ms cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-ui); background: var(--col-bg); color: var(--col-text); line-height: 1.6; min-height: 100vh; }

/* ── Layout Shell ─────────────────────────────────────────────────────────── */
.portal-shell { display: grid; grid-template-columns: var(--sidebar-width) 1fr; min-height: 100vh; }
.portal-content { grid-column: 2; padding: 32px 40px; max-width: 1200px; overflow-x: hidden; }

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

.sidebar-logo { padding: 22px 20px 18px; border-bottom: 1px solid var(--sidebar-border); }
.sidebar-logo .logo-mark { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.sidebar-logo .logo-icon {
  width: 32px; height: 32px; background: var(--col-accent);
  border-radius: var(--radius-md); display: flex; align-items: center;
  justify-content: center; font-size: 15px; color: #fff; flex-shrink: 0;
}
.sidebar-logo .logo-text { font-size: 13.5px; font-weight: 600; color: #f1f5f9; letter-spacing: -0.01em; line-height: 1.2; }
.sidebar-logo .logo-sub  { font-size: 10px; color: #64748b; font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.sidebar-nav { flex: 1; padding: 10px 0; }

.nav-section-label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: #475569;
  padding: 16px 20px 6px; font-family: var(--font-mono);
}

.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 8px 20px;
  font-size: 13.5px; font-weight: 400; color: #cbd5e1;
  text-decoration: none; border-radius: 0; position: relative;
  cursor: pointer; border: none; background: none; width: 100%; text-align: left;
  transition: color var(--transition), background var(--transition);
}
.nav-item:hover { color: #f1f5f9; background: rgba(255,255,255,0.06); }
.nav-item.active { color: #ffffff; background: rgba(255,255,255,0.1); font-weight: 500; }
.nav-item.active::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--col-accent); border-radius: 0 2px 2px 0;
}
.nav-item .nav-icon { width: 16px; height: 16px; opacity: 0.65; flex-shrink: 0; }
.nav-item.active .nav-icon { opacity: 1; }
.nav-item:hover .nav-icon { opacity: 0.9; }

.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--sidebar-border); }
.sidebar-user { display: flex; align-items: center; gap: 10px; }
.user-avatar {
  width: 30px; height: 30px; border-radius: 50%; background: var(--col-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; color: #fff; flex-shrink: 0; font-family: var(--font-mono);
}
.user-info { min-width: 0; flex: 1; }
.user-name { font-size: 12px; font-weight: 500; color: #e2e8f0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-ref  { font-size: 10px; color: #64748b; font-family: var(--font-mono); }

/* ── Page Header ──────────────────────────────────────────────────────────── */
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 28px; gap: 16px; }
.page-title    { font-size: 21px; font-weight: 600; color: var(--col-text); letter-spacing: -0.02em; line-height: 1.2; }
.page-subtitle { font-size: 13px; color: var(--col-text-muted); margin-top: 3px; }

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card    { background: var(--col-bg-card); border: 1px solid var(--col-border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); }
.card-sm { padding: 16px; }
.card-lg { padding: 32px; }
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--col-border-soft);
}
.card-title    { font-size: 14px; font-weight: 600; color: var(--col-text); letter-spacing: -0.01em; }
.card-subtitle { font-size: 12px; color: var(--col-text-muted); margin-top: 2px; }

/* ── Stat Cards ───────────────────────────────────────────────────────────── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card {
  background: var(--col-bg-card); border: 1px solid var(--col-border);
  border-radius: var(--radius-lg); padding: 20px 22px;
  position: relative; overflow: hidden; box-shadow: var(--shadow-sm);
}
.stat-card::after { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.stat-card.accent::after  { background: var(--col-accent); }
.stat-card.success::after { background: var(--col-success); }
.stat-card.warning::after { background: var(--col-warning); }
.stat-card.danger::after  { background: var(--col-danger); }
.stat-label { font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--col-text-faint); font-family: var(--font-mono); margin-bottom: 10px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--col-text); letter-spacing: -0.03em; line-height: 1; font-family: var(--font-mono); }
.stat-meta  { font-size: 11.5px; color: var(--col-text-muted); margin-top: 8px; }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 16px;
  font-family: var(--font-ui); font-size: 13px; font-weight: 500;
  border-radius: var(--radius-md); border: 1px solid transparent;
  cursor: pointer; text-decoration: none; white-space: nowrap; line-height: 1.4;
  transition: all var(--transition);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary   { background: var(--col-accent); color: #fff; border-color: var(--col-accent); }
.btn-primary:hover:not(:disabled)   { background: var(--col-accent-hover); border-color: var(--col-accent-hover); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
.btn-secondary { background: #fff; color: var(--col-text-muted); border-color: var(--col-border); }
.btn-secondary:hover:not(:disabled) { color: var(--col-text); border-color: #c0c8d8; box-shadow: var(--shadow-sm); }
.btn-danger    { background: #fff; color: var(--col-danger); border-color: rgba(220,38,38,0.3); }
.btn-danger:hover:not(:disabled)    { background: var(--col-danger-dim); border-color: var(--col-danger); }
.btn-ghost     { background: transparent; color: var(--col-text-muted); border-color: transparent; }
.btn-ghost:hover:not(:disabled)     { background: var(--col-bg-elevated); color: var(--col-text); border-color: var(--col-border); }
.btn-sm      { padding: 5px 10px; font-size: 12px; }
.btn-lg      { padding: 11px 22px; font-size: 14px; }
.btn-icon    { padding: 7px; gap: 0; }
.btn-icon-sm { padding: 4px; gap: 0; }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 12.5px; font-weight: 500; color: var(--col-text); margin-bottom: 5px; }
.form-label .required { color: var(--col-danger); margin-left: 2px; }
.form-control {
  width: 100%; padding: 8px 12px;
  background: var(--col-bg-input); border: 1px solid var(--col-border);
  border-radius: var(--radius-md); color: var(--col-text);
  font-family: var(--font-ui); font-size: 13.5px; outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus { border-color: var(--col-accent); box-shadow: 0 0 0 3px rgba(37,99,235,0.12); }
.form-control::placeholder { color: var(--col-text-faint); }
.form-control:disabled { background: var(--col-bg); opacity: 0.6; cursor: not-allowed; }
.form-mono  { font-family: var(--font-mono); font-size: 12.5px; }
.form-hint  { font-size: 11.5px; color: var(--col-text-faint); margin-top: 5px; line-height: 1.5; }
.form-error { font-size: 11.5px; color: var(--col-danger); margin-top: 5px; }
select.form-control {
  cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; padding-right: 32px;
}
textarea.form-control { resize: vertical; min-height: 80px; }

/* ── Tables ───────────────────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; border: 1px solid var(--col-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; background: var(--col-bg-card); }
thead th {
  padding: 10px 16px; text-align: left; font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--col-text-faint);
  background: var(--col-bg-elevated); border-bottom: 1px solid var(--col-border);
  font-family: var(--font-mono); white-space: nowrap;
}
tbody tr { border-bottom: 1px solid var(--col-border-soft); transition: background var(--transition); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f8faff; }
tbody td { padding: 11px 16px; color: var(--col-text); vertical-align: middle; }
.td-mono    { font-family: var(--font-mono); font-size: 12px; color: var(--col-text-muted); }
.td-actions { text-align: right; white-space: nowrap; }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px; border-radius: 100px;
  font-size: 11px; font-weight: 500; font-family: var(--font-mono);
  letter-spacing: 0.02em; white-space: nowrap; border: 1px solid transparent;
}
.badge::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; opacity: 0.8; }
.badge-active    { color: #047857; background: #d1fae5; border-color: #a7f3d0; }
.badge-pending   { color: #b45309; background: #fef3c7; border-color: #fde68a; }
.badge-cancelled { color: var(--col-text-faint); background: #f3f4f6; border-color: #e5e7eb; }
.badge-suspended { color: #b91c1c; background: #fee2e2; border-color: #fca5a5; }
.badge-draft     { color: var(--col-text-faint); background: #f3f4f6; border-color: #e5e7eb; }
.badge-sent      { color: #1d4ed8; background: #dbeafe; border-color: #bfdbfe; }
.badge-paid      { color: #047857; background: #d1fae5; border-color: #a7f3d0; }
.badge-overdue   { color: #b91c1c; background: #fee2e2; border-color: #fca5a5; }
.badge-void      { color: var(--col-text-faint); background: #f3f4f6; border-color: #e5e7eb; }
.badge-manual    { color: #b45309; background: #fef3c7; border-color: #fde68a; }
.badge-stripe    { color: #5b21b6; background: #ede9fe; border-color: #c4b5fd; }
.badge-trial     { color: #1d4ed8; background: #dbeafe; border-color: #bfdbfe; }

/* ── Alerts ───────────────────────────────────────────────────────────────── */
.alert { display: flex; gap: 12px; padding: 13px 16px; border-radius: var(--radius-md); font-size: 13px; line-height: 1.5; border: 1px solid; margin-bottom: 20px; }
.alert-info    { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-danger  { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-icon    { font-size: 14px; flex-shrink: 0; line-height: 1.6; width: 18px; text-align: center; }
.alert-body    { flex: 1; }
.alert-title   { font-weight: 600; margin-bottom: 2px; }

/* ── Mono Data ────────────────────────────────────────────────────────────── */
.mono-ref {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--col-text-muted);
  background: var(--col-bg-elevated); border: 1px solid var(--col-border);
  border-radius: var(--radius-sm); padding: 2px 7px; display: inline-block;
}
.guid-display { font-family: var(--font-mono); font-size: 11px; color: var(--col-text-faint); word-break: break-all; }

/* ── Empty States ─────────────────────────────────────────────────────────── */
.empty-state      { text-align: center; padding: 60px 20px; color: var(--col-text-faint); }
.empty-state-icon { font-size: 32px; margin-bottom: 14px; opacity: 0.4; color: var(--col-text-muted); }
.empty-state-title { font-size: 15px; font-weight: 600; color: var(--col-text-muted); margin-bottom: 6px; }
.empty-state-body  { font-size: 13px; color: var(--col-text-faint); max-width: 320px; margin: 0 auto 20px; line-height: 1.6; }

/* ── Loading ──────────────────────────────────────────────────────────────── */
.spinner { width: 20px; height: 20px; border: 2px solid var(--col-border); border-top-color: var(--col-accent); border-radius: 50%; animation: spin 0.7s linear infinite; display: inline-block; flex-shrink: 0; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 60px; color: var(--col-text-muted); font-size: 13px; }

/* ── Dividers ─────────────────────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--col-border); margin: 20px 0; }

/* ── Modals ───────────────────────────────────────────────────────────────── */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,23,42,0.5); backdrop-filter: blur(3px); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 20px; animation: fadeIn 120ms ease; }
@keyframes fadeIn { from { opacity: 0; } }
.modal { background: var(--col-bg-card); border: 1px solid var(--col-border); border-radius: var(--radius-xl); width: 100%; max-width: 520px; box-shadow: var(--shadow-lg); animation: slideUp 150ms cubic-bezier(0.34,1.56,0.64,1); }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } }
.modal-header { padding: 22px 24px 18px; border-bottom: 1px solid var(--col-border-soft); display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.modal-title  { font-size: 16px; font-weight: 600; color: var(--col-text); letter-spacing: -0.02em; }
.modal-body   { padding: 22px 24px; }
.modal-footer { padding: 14px 24px; border-top: 1px solid var(--col-border-soft); display: flex; align-items: center; justify-content: flex-end; gap: 10px; background: var(--col-bg-elevated); border-radius: 0 0 var(--radius-xl) var(--radius-xl); }

/* ── Tabs ─────────────────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--col-border); margin-bottom: 24px; }
.tab-btn { padding: 10px 18px; font-size: 13px; font-weight: 500; color: var(--col-text-muted); background: transparent; border: none; border-bottom: 2px solid transparent; cursor: pointer; transition: all var(--transition); margin-bottom: -1px; }
.tab-btn:hover  { color: var(--col-text); }
.tab-btn.active { color: var(--col-accent); border-bottom-color: var(--col-accent); }

/* ── Pagination ───────────────────────────────────────────────────────────── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 24px; }
.page-btn { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; font-size: 13px; font-family: var(--font-mono); color: var(--col-text-muted); background: var(--col-bg-card); border: 1px solid var(--col-border); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.page-btn:hover   { color: var(--col-accent); border-color: var(--col-accent); }
.page-btn.active  { color: var(--col-accent); border-color: var(--col-accent); background: var(--col-accent-dim); }
.page-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ── Utilities ────────────────────────────────────────────────────────────── */
.text-muted   { color: var(--col-text-muted); }
.text-faint   { color: var(--col-text-faint); }
.text-accent  { color: var(--col-accent); }
.text-success { color: var(--col-success); }
.text-warning { color: var(--col-warning); }
.text-danger  { color: var(--col-danger); }
.text-mono    { font-family: var(--font-mono); }
.text-sm      { font-size: 12px; }
.text-xs      { font-size: 11px; }
.d-flex       { display: flex; }
.align-center { align-items: center; }
.gap-2        { gap: 8px; }
.gap-3        { gap: 12px; }
.ml-auto      { margin-left: auto; }
.mb-0         { margin-bottom: 0 !important; }
.mb-4         { margin-bottom: 16px; }
.mb-6         { margin-bottom: 24px; }
.w-full       { width: 100%; }
.grid-2       { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3       { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ── Blazor error UI ──────────────────────────────────────────────────────── */
#blazor-error-ui { background: #fef2f2; border: 1px solid #fca5a5; border-radius: var(--radius-md); bottom: 20px; right: 20px; color: #991b1b; display: none; left: auto; padding: 12px 16px; position: fixed; width: 380px; z-index: 9999; font-size: 13px; box-shadow: var(--shadow-md); }
#blazor-error-ui .dismiss { cursor: pointer; float: right; font-weight: 700; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .portal-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .portal-content { grid-column: 1; padding: 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}