/* LayerInvoice — Premium Custom Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:wght@400;600;700&display=swap');

:root {
  /* Color Palette Tokens (from InvoiceTemplate.md) */
  --color-text-primary:     #333333;
  --color-text-secondary:   #777777;
  --color-text-muted:       #AAAAAA;
  --color-text-inverse:     #FFFFFF;
  --color-surface:          #FFFFFF;
  --color-surface-alt:      #F9F9F9;
  --color-surface-hover:    #F2F2F2;
  --color-border:           #EAEAEA;
  --color-border-strong:    #CCCCCC;
  --color-accent:           #333333;
  --color-accent-hover:     #111111;
  --color-accent-light:     #F9F9F9;

  /* Status Colors */
  --color-status-draft:         #777777;
  --color-status-draft-bg:      #F9F9F9;
  --color-status-pending:       #D97706;
  --color-status-pending-bg:    #FFFBEB;
  --color-status-sent:          #2563EB;
  --color-status-sent-bg:       #EFF6FF;
  --color-status-paid:          #16A34A;
  --color-status-paid-bg:       #F0FDF4;
  --color-status-overdue:       #DC2626;
  --color-status-overdue-bg:    #FEF2F2;
  --color-status-partial:       #7C3AED;
  --color-status-partial-bg:    #F5F3FF;
  --color-status-cancelled:     #6B7280;
  --color-status-cancelled-bg:  #F3F4F6;
  --color-status-refunded:      #0891B2;
  --color-status-refunded-bg:   #ECFEFF;
  --color-status-accepted:      #16A34A;
  --color-status-accepted-bg:   #F0FDF4;
  --color-status-rejected:      #DC2626;
  --color-status-rejected-bg:   #FEF2F2;
  --color-status-expired:       #6B7280;
  --color-status-expired-bg:    #F3F4F6;
  --color-status-converted:     #2563EB;
  --color-status-converted-bg:  #EFF6FF;
  --color-status-viewed:        #0891B2;
  --color-status-viewed-bg:     #ECFEFF;

  /* Feedback Alert Colors */
  --color-success:    #16A34A;
  --color-success-bg: #F0FDF4;
  --color-warning:    #D97706;
  --color-warning-bg: #FFFBEB;
  --color-error:      #DC2626;
  --color-error-bg:   #FEF2F2;
  --color-info:       #2563EB;
  --color-info-bg:    #EFF6FF;

  /* Spacing Scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Typography scaled for screen (approx pt conversion) */
  --text-hero:       2rem;      /* ~24pt */
  --text-section:    1.25rem;   /* ~16pt */
  --text-subheading: 1rem;      /* ~12pt */
  --text-body:       0.875rem;  /* ~10pt */
  --text-label:      0.875rem;  /* ~10pt */
  --text-small:      0.8125rem; /* ~9pt */
  --text-micro:      0.75rem;   /* ~8pt */

  /* PicoCSS Variable Overrides */
  --pico-font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --pico-font-size: var(--text-body);
  --pico-background-color: var(--color-surface);
  --pico-color: var(--color-text-primary);
  --pico-secondary-color: var(--color-text-secondary);
  --pico-border-radius: 6px;
  --pico-border-color: var(--color-border);
  --pico-primary: var(--color-accent);
  --pico-primary-hover: var(--color-accent-hover);
  --pico-primary-background: var(--color-accent);
  --pico-form-element-background-color: var(--color-surface-alt);
  --pico-form-element-border-color: var(--color-border);
  --pico-table-border-color: var(--color-border);
  --pico-table-row-stripped-background-color: var(--color-surface-alt);
}

/* Base resets & layout */
body {
  font-family: var(--pico-font-family);
  font-size: var(--pico-font-size);
  color: var(--pico-color);
  background-color: var(--color-surface-alt);
  margin: 0;
  padding: 0;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

/* Master Structure Layout */
.li-app-container {
  display: flex;
  flex: 1;
  width: 100%;
}

/* Top Navigation Bar */
.li-top-nav {
  height: 64px;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.li-top-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-section);
  color: var(--color-text-primary);
  text-decoration: none;
}

.li-top-nav__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.li-top-nav__tenant-badge {
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px var(--space-2);
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Sidebar Navigation */
.li-sidebar {
  width: 240px;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  flex-shrink: 0;
}

.li-nav-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.li-nav-section__label {
  padding: 0 var(--space-5);
  font-size: var(--text-micro);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.li-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
}

.li-nav-item:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-text-primary);
}

.li-nav-item--active {
  background-color: var(--color-surface-alt);
  color: var(--color-text-primary);
  border-left-color: var(--color-accent);
}

/* Main Content Workspace */
.li-main-content {
  flex: 1;
  padding: var(--space-8);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}

/* Premium Card Panels */
.li-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.li-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.li-card__header h2, .li-card__header h3 {
  margin: 0;
  font-size: var(--text-section);
  font-weight: 700;
  color: var(--color-text-primary);
}

.li-card__actions {
  display: flex;
  gap: var(--space-2);
}

/* Button Component Overrides */
.li-btn {
  font-family: var(--pico-font-family);
  font-weight: 600;
  font-size: var(--text-body);
  padding: var(--space-2) var(--space-4);
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  line-height: 1.2;
}

.li-btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text-inverse) !important;
  border-color: var(--color-accent);
}

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

.li-btn--secondary {
  background-color: transparent;
  color: var(--color-text-primary) !important;
  border-color: var(--color-border-strong);
}

.li-btn--secondary:hover {
  background-color: var(--color-surface-alt);
  border-color: var(--color-text-primary);
}

.li-btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary) !important;
  border-color: transparent;
  padding: var(--space-2) var(--space-3);
}

.li-btn--ghost:hover {
  color: var(--color-text-primary) !important;
  background-color: var(--color-surface-alt);
}

.li-btn--danger {
  background-color: var(--color-error);
  color: var(--color-text-inverse) !important;
  border-color: var(--color-error);
}

.li-btn--danger:hover {
  background-color: #b91c1c;
  border-color: #b91c1c;
}

.li-btn--sm {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-small);
  border-radius: 4px;
}

.li-btn--lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-subheading);
}

/* Status Badges */
.li-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: var(--text-micro);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.li-badge--draft     { color: var(--color-status-draft);     background: var(--color-status-draft-bg);     border-color: #e5e7eb; }
.li-badge--pending   { color: var(--color-status-pending);   background: var(--color-status-pending-bg);   border-color: #fde68a; }
.li-badge--sent      { color: var(--color-status-sent);      background: var(--color-status-sent-bg);      border-color: #bfdbfe; }
.li-badge--paid      { color: var(--color-status-paid);      background: var(--color-status-paid-bg);      border-color: #bbf7d0; }
.li-badge--overdue   { color: var(--color-status-overdue);   background: var(--color-status-overdue-bg);   border-color: #fca5a5; }
.li-badge--partial   { color: var(--color-status-partial);   background: var(--color-status-partial-bg);   border-color: #ddd6fe; }
.li-badge--cancelled { color: var(--color-status-cancelled); background: var(--color-status-cancelled-bg); border-color: #e5e7eb; }
.li-badge--refunded  { color: var(--color-status-refunded);  background: var(--color-status-refunded-bg);  border-color: #a5f3fc; }
.li-badge--accepted  { color: var(--color-status-accepted);  background: var(--color-status-accepted-bg);  border-color: #bbf7d0; }
.li-badge--rejected  { color: var(--color-status-rejected);  background: var(--color-status-rejected-bg);  border-color: #fca5a5; }
.li-badge--expired   { color: var(--color-status-expired);   background: var(--color-status-expired-bg);   border-color: #e5e7eb; }
.li-badge--converted { color: var(--color-status-converted); background: var(--color-status-converted-bg); border-color: #bfdbfe; }
.li-badge--viewed    { color: var(--color-status-viewed);    background: var(--color-status-viewed-bg);    border-color: #a5f3fc; }

/* Dashboard Stat Cards Grid */
.li-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.li-stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-5);
  box-shadow: 0 1px 2px rgba(0,0,0,0.01);
}

.li-stat-card__label {
  font-size: var(--text-micro);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin: 0 0 var(--space-2) 0;
}

.li-stat-card__value {
  font-size: var(--text-section);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.li-stat-card__sub {
  font-size: var(--text-micro);
  color: var(--color-text-muted);
  margin: var(--space-1) 0 0 0;
}

/* Custom Table Layouts */
.li-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background-color: var(--color-surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
}

table thead tr {
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
}

table thead th {
  font-size: var(--text-small);
  font-weight: 700;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-3) var(--space-4);
  text-align: left;
}

table tbody tr {
  border-bottom: 1px solid var(--color-border);
}

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

table tbody tr:hover {
  background-color: var(--color-surface-alt);
}

table tbody td {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  vertical-align: middle;
}

.li-col-right {
  text-align: right !important;
}

.li-col-center {
  text-align: center !important;
}

.li-money {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.li-col-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* Forms styling additions */
form section {
  margin-bottom: var(--space-6);
}

.li-form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

label {
  color: var(--color-text-secondary);
  font-size: var(--text-small);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-1);
  display: block;
}

input, select, textarea {
  margin-bottom: 0 !important; /* Reset PicoCSS default margins */
}

input + small, select + small, textarea + small {
  display: block;
  margin-top: var(--space-3) !important;
  margin-bottom: var(--space-4) !important;
}

/* Branded dynamic line-item builder */
.li-line-item-table input,
.li-line-item-table select {
  font-size: var(--text-small);
  padding: var(--space-1) var(--space-2);
  height: auto;
}

.li-line-item-table td {
  padding: var(--space-2) var(--space-3);
}

.li-line-item-table tr.li-line-item-subrow td {
  background-color: var(--color-surface-alt);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  border-top: none;
}

/* Flash Messages */
.li-flash-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.li-flash {
  padding: var(--space-3) var(--space-5);
  border-radius: 8px;
  font-size: var(--text-body);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: li-slide-in 0.3s ease-out;
}

.li-flash--success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: #bbf7d0;
}

.li-flash--error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-color: #fca5a5;
}

.li-flash--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: #fde68a;
}

@keyframes li-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Branded Modern Dialog / Modal */
dialog {
  padding: 0 !important;
  border: none;
  background: transparent;
  box-shadow: none;
  width: 100%;
  max-width: 600px;
}

dialog article {
  margin: 0 !important;
  padding: var(--space-6) !important;
  background: var(--color-surface) !important;
  border: 1px solid var(--color-border) !important;
  border-radius: 12px !important;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12) !important;
  box-sizing: border-box;
}

dialog header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

dialog header h3 {
  margin: 0;
  font-size: var(--text-section);
  font-weight: 700;
}

dialog footer {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

.li-calc-section {
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.li-calc-section h4 {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--text-subheading);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.li-calc-preview {
  background-color: #fafafa;
  border: 1px dashed var(--color-border-strong);
  border-radius: 6px;
  padding: var(--space-4);
  margin-top: var(--space-4);
}

.li-calc-preview h5 {
  margin: 0 0 var(--space-2) 0;
  font-weight: 700;
  font-size: var(--text-body);
}

/* HTMX Spinner Indicator */
.li-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-text-primary);
  border-radius: 50%;
  animation: li-spin 0.6s linear infinite;
}

.htmx-request .li-spinner,
.htmx-request.li-spinner {
  display: inline-block;
}

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

/* Client Ledger Header Details */
.li-ledger-summary {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.li-ledger-summary__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.li-ledger-summary__label {
  font-size: var(--text-micro);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.li-ledger-summary__value {
  font-size: var(--text-subheading);
  font-weight: 700;
  color: var(--color-text-primary);
}

/* Auth Login Page Specifics */
.li-auth-body {
  background-color: var(--color-surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-4);
}

.li-auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-8);
  width: 100%;
  max-width: 420px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.li-auth-card__header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.li-auth-card__logo {
  font-size: 2.5rem;
  margin-bottom: var(--space-2);
}

.li-auth-card__title {
  font-size: var(--text-section);
  font-weight: 700;
  margin: 0;
  color: var(--color-text-primary);
}

.li-auth-card__sub {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  margin: var(--space-1) 0 0 0;
}

/* Multi-tenant Setup Layout */
.li-setup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .li-sidebar {
    display: none; /* In v1 tablet collapses. For basic responsiveness, we hide sidebar or adjust margins */
  }
  .li-setup-grid {
    grid-template-columns: 1fr;
  }
}