/* ============================================================
   Freelancer Payment Calculator - Design System
   Professional financial tool for managing freelancer payments.
   ============================================================ */

/* ------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ------------------------------------------------------------ */
:root {
  /* Primary palette - corporate blue */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Gray palette */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Semantic colors */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;

  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-warning-700: #b45309;

  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;
  --color-danger-700: #b91c1c;

  --color-info-50: #eff6ff;
  --color-info-100: #dbeafe;
  --color-info-500: #3b82f6;
  --color-info-600: #2563eb;

  /* Surface colors */
  --color-bg: #f1f5f9;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-surface-overlay: rgba(0, 0, 0, 0.5);
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Text colors */
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #ffffff;
  --color-text-link: #2563eb;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Modular type scale (1.2 ratio) */
  --text-xs: 0.694rem;     /* ~11px */
  --text-sm: 0.833rem;     /* ~13px */
  --text-base: 1rem;       /* 16px  */
  --text-md: 1.125rem;     /* 18px  */
  --text-lg: 1.25rem;      /* 20px  */
  --text-xl: 1.5rem;       /* 24px  */
  --text-2xl: 1.875rem;    /* 30px  */
  --text-3xl: 2.25rem;     /* 36px  */

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* 4px spacing system */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 60px;
  --navbar-height: 56px;
  --content-max-width: 1400px;

  /* Z-index scale */
  --z-sidebar: 40;
  --z-navbar: 50;
  --z-dropdown: 60;
  --z-modal-backdrop: 70;
  --z-modal: 80;
  --z-toast: 90;
}


/* ------------------------------------------------------------
   2. Reset & Base Styles
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-primary-800);
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-gray-900);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-md); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }


/* ------------------------------------------------------------
   3. App Layout (Sidebar + Navbar + Content)
   ------------------------------------------------------------ */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* -- Sidebar -- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  transition: width var(--transition-slow), transform var(--transition-slow);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  height: var(--navbar-height);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sidebar-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary-600);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  color: white;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.sidebar-brand-text {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-100);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-3) 0;
}

.sidebar-section-label {
  padding: var(--space-4) var(--space-5) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  white-space: nowrap;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border-left: 3px solid transparent;
}

.sidebar-link:hover {
  color: var(--color-gray-100);
  background-color: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

.sidebar-link.active {
  color: var(--color-primary-300);
  background-color: rgba(59, 130, 246, 0.1);
  border-left-color: var(--color-primary-400);
}

.sidebar-link-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar-link.active .sidebar-link-icon {
  opacity: 1;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

/* -- Navbar -- */
.navbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--navbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: var(--z-navbar);
  transition: left var(--transition-slow);
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
}

.navbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.navbar-breadcrumb-separator {
  color: var(--color-gray-300);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-gray-600);
  transition: background var(--transition-fast);
}

.navbar-hamburger:hover {
  background: var(--color-gray-100);
}

/* -- Main Content -- */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding-top: var(--navbar-height);
  transition: margin-left var(--transition-slow);
}

.main-content {
  padding: var(--space-6);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* -- Mobile sidebar overlay -- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-surface-overlay);
  z-index: calc(var(--z-sidebar) - 1);
}


/* ------------------------------------------------------------
   4. Cards
   ------------------------------------------------------------ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-gray-50);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* Stat cards for dashboard */
.stat-card {
  padding: var(--space-5);
}

.stat-card-label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  line-height: 1.2;
}

.stat-card-change {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-1);
}

.stat-card-change.positive { color: var(--color-success-600); }
.stat-card-change.negative { color: var(--color-danger-600); }


/* ------------------------------------------------------------
   5. Tables (Data-Dense / Excel-like)
   ------------------------------------------------------------ */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table thead {
  background: var(--color-gray-50);
  position: sticky;
  top: 0;
  z-index: 1;
}

.table th {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-600);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--color-border-strong);
  white-space: nowrap;
  user-select: none;
}

.table th.sortable {
  cursor: pointer;
}

.table th.sortable:hover {
  color: var(--color-gray-900);
  background: var(--color-gray-100);
}

.table th.sorted-asc::after,
.table th.sorted-desc::after {
  margin-left: var(--space-1);
  font-size: 10px;
}

.table th.sorted-asc::after { content: "\25B2"; }
.table th.sorted-desc::after { content: "\25BC"; }

.table td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: middle;
}

.table tbody tr:hover {
  background: var(--color-primary-50);
}

.table tbody tr.selected {
  background: var(--color-primary-100);
}

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

/* Numeric columns aligned right */
.table .col-number,
.table .col-currency {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.table .col-currency {
  white-space: nowrap;
}

/* Compact table variant for payment entry */
.table-compact th,
.table-compact td {
  padding: var(--space-1) var(--space-2);
}

/* Editable table cells */
.table-editable td.editable {
  padding: 0;
}

.table-editable td.editable input {
  width: 100%;
  border: none;
  background: transparent;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-align: right;
  outline: none;
}

.table-editable td.editable input:focus {
  background: var(--color-primary-50);
  box-shadow: inset 0 0 0 2px var(--color-primary-400);
}

/* Grid-style table for data entry */
.table-grid th,
.table-grid td {
  border: 1px solid var(--color-border);
}

/* Row number column */
.table .col-row-num {
  width: 40px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  background: var(--color-gray-50);
}

/* Totals row */
.table tfoot td {
  padding: var(--space-2) var(--space-3);
  font-weight: var(--font-weight-semibold);
  background: var(--color-gray-50);
  border-top: 2px solid var(--color-border-strong);
}

/* Table toolbar */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-wrap: wrap;
}

.table-toolbar-left,
.table-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Table pagination */
.table-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.table-pagination-info {
  font-size: var(--text-sm);
}

.table-pagination-controls {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}


/* ------------------------------------------------------------
   6. Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary */
.btn-primary {
  background: var(--color-primary-600);
  color: var(--color-text-inverse);
  border-color: var(--color-primary-600);
}
.btn-primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
}
.btn-primary:active {
  background: var(--color-primary-800);
}

/* Secondary */
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

/* Success */
.btn-success {
  background: var(--color-success-600);
  color: var(--color-text-inverse);
  border-color: var(--color-success-600);
}
.btn-success:hover {
  background: var(--color-success-700);
}

/* Danger */
.btn-danger {
  background: var(--color-danger-600);
  color: var(--color-text-inverse);
  border-color: var(--color-danger-600);
}
.btn-danger:hover {
  background: var(--color-danger-700);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-text);
}

/* Link style */
.btn-link {
  background: transparent;
  color: var(--color-text-link);
  padding: 0;
  border: none;
}
.btn-link:hover {
  color: var(--color-primary-800);
  text-decoration: underline;
}

/* Sizes */
.btn-xs {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}

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

/* Icon-only button */
.btn-icon {
  padding: var(--space-2);
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  width: 28px;
  height: 28px;
  padding: var(--space-1);
}

/* Button group */
.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.btn-group .btn + .btn {
  margin-left: -1px;
}


/* ------------------------------------------------------------
   7. Forms
   ------------------------------------------------------------ */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-1);
}

.form-label-required::after {
  content: " *";
  color: var(--color-danger-500);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:disabled,
.form-select:disabled {
  background: var(--color-gray-100);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Input with error */
.form-input.is-invalid,
.form-select.is-invalid {
  border-color: var(--color-danger-500);
}

.form-input.is-invalid:focus,
.form-select.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger-600);
  margin-top: var(--space-1);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Select with custom arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 5.646a.5.5 0 0 1 .708 0L8 8.293l2.646-2.647a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-8);
}

/* Compact form inputs for table editing */
.form-input-compact {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

/* Checkbox & radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check-input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary-600);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
}

/* Form row (inline) */
.form-row {
  display: flex;
  gap: var(--space-4);
  align-items: flex-end;
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

/* Input group (prefix/suffix) */
.input-group {
  display: flex;
  align-items: stretch;
}

.input-group .form-input {
  border-radius: 0;
  flex: 1;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-gray-100);
  border: 1px solid var(--color-border-strong);
  white-space: nowrap;
}

.input-group > :first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group > :last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group > :not(:first-child) {
  margin-left: -1px;
}


/* ------------------------------------------------------------
   8. Badges & Status
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-default {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.badge-primary {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-success {
  background: var(--color-success-100);
  color: var(--color-success-700);
}

.badge-warning {
  background: var(--color-warning-100);
  color: var(--color-warning-700);
}

.badge-danger {
  background: var(--color-danger-100);
  color: var(--color-danger-700);
}

.badge-info {
  background: var(--color-info-100);
  color: var(--color-info-500);
}

/* Dot indicator */
.badge-dot {
  padding-left: var(--space-1);
}

.badge-dot::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-right: var(--space-1);
}

.badge-dot.badge-success::before { background: var(--color-success-500); }
.badge-dot.badge-warning::before { background: var(--color-warning-500); }
.badge-dot.badge-danger::before { background: var(--color-danger-500); }
.badge-dot.badge-primary::before { background: var(--color-primary-500); }


/* ------------------------------------------------------------
   9. Modals
   ------------------------------------------------------------ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--color-surface-overlay);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modal-enter 0.2s ease-out;
}

@keyframes modal-enter {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-lg { max-width: 720px; }
.modal-xl { max-width: 960px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--text-md);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-100);
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-gray-50);
}


/* ------------------------------------------------------------
   10. Toasts / Notifications
   ------------------------------------------------------------ */
.toast-container {
  position: fixed;
  top: calc(var(--navbar-height) + var(--space-4));
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: 400px;
  width: 100%;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in 0.3s ease-out;
}

.toast.toast-exiting {
  animation: toast-out 0.2s ease-in forwards;
}

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

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.toast-close {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  cursor: pointer;
}

.toast-close:hover {
  color: var(--color-text);
}

.toast-success { border-left: 3px solid var(--color-success-500); }
.toast-danger  { border-left: 3px solid var(--color-danger-500); }
.toast-warning { border-left: 3px solid var(--color-warning-500); }
.toast-info    { border-left: 3px solid var(--color-info-500); }


/* ------------------------------------------------------------
   11. Dropdown
   ------------------------------------------------------------ */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-1);
  min-width: 180px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  display: none;
  padding: var(--space-1) 0;
}

.dropdown-menu.active {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-gray-50);
  text-decoration: none;
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-1) 0;
}

/* User avatar in navbar */
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
}


/* ------------------------------------------------------------
   12. Page-Level Components
   ------------------------------------------------------------ */

/* Page header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-header-title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
}

.page-header-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* Content grid */
.content-grid {
  display: grid;
  gap: var(--space-6);
}

.content-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.content-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Empty state */
.empty-state {
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  color: var(--color-gray-300);
}

.empty-state-title {
  font-size: var(--text-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-state-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 400px;
  margin: 0 auto var(--space-4);
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-200);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-sm { width: 14px; height: 14px; }
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

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

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-10);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}


/* ------------------------------------------------------------
   13. Utility Classes
   ------------------------------------------------------------ */

/* Text alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text colors */
.text-primary { color: var(--color-primary-600); }
.text-success { color: var(--color-success-600); }
.text-warning { color: var(--color-warning-600); }
.text-danger { color: var(--color-danger-600); }
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }

/* Font weight */
.fw-normal { font-weight: var(--font-weight-normal); }
.fw-medium { font-weight: var(--font-weight-medium); }
.fw-semibold { font-weight: var(--font-weight-semibold); }
.fw-bold { font-weight: var(--font-weight-bold); }

/* Font size */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-md { font-size: var(--text-md); }
.text-lg { font-size: var(--text-lg); }

/* Mono / tabular numbers */
.font-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-grid { display: grid; }

/* Flex utilities */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Margin */
.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }

.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }

.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-sm { max-width: 384px; }
.max-w-md { max-width: 448px; }
.max-w-lg { max-width: 512px; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }

/* Border */
.border { border: 1px solid var(--color-border); }
.border-top { border-top: 1px solid var(--color-border); }
.border-bottom { border-bottom: 1px solid var(--color-border); }
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

/* Visibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Truncate */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-4) 0;
}


/* ------------------------------------------------------------
   14. Responsive Breakpoints
   ------------------------------------------------------------ */

/* Mobile (< 768px) */
@media (max-width: 767px) {
  :root {
    --sidebar-width: 240px;
  }

  .sidebar {
    transform: translateX(-100%);
  }

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

  .sidebar-overlay.active {
    display: block;
  }

  .navbar {
    left: 0;
  }

  .navbar-hamburger {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
  }

  .main-content {
    padding: var(--space-4);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-grid-2,
  .content-grid-3 {
    grid-template-columns: 1fr;
  }

  .form-row {
    flex-direction: column;
  }

  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .table-pagination {
    flex-direction: column;
    gap: var(--space-2);
    align-items: stretch;
    text-align: center;
  }

  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    max-width: none;
  }

  .modal {
    margin: var(--space-4);
    max-height: calc(100vh - var(--space-8));
  }

  /* Bottom nav for mobile */
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    z-index: var(--z-navbar);
    padding: var(--space-1) 0;
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  .mobile-bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-1) 0;
    font-size: 10px;
    color: var(--color-text-muted);
    text-decoration: none;
  }

  .mobile-bottom-nav-item.active {
    color: var(--color-primary-600);
  }

  .mobile-bottom-nav-item svg {
    width: 20px;
    height: 20px;
  }

  /* Add bottom padding to content for mobile bottom nav */
  .main-wrapper {
    padding-bottom: 72px;
  }

  /* Hide desktop elements */
  .hide-mobile { display: none !important; }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .mobile-bottom-nav {
    display: none;
  }

  .hide-tablet { display: none !important; }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  .mobile-bottom-nav {
    display: none;
  }

  .hide-desktop { display: none !important; }
}

/* Large screens */
@media (min-width: 1280px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}