/**
 * BrigSpend Central Theme System
 * ==============================
 * Centralized design tokens for consistent theming across the application.
 * Supports dark mode with cyan accents, typography scales, and spacing system.
 * 
 * Usage: Import this file in your HTML head before other stylesheets:
 *   <link rel="stylesheet" href="app-assets/css/theme.css">
 */

/* ============================================================================
   ROOT COLOR VARIABLES - Dark Mode with Cyan Accents
   ============================================================================ */
:root {
  /* ---- PRIMARY COLORS ---- */
  --color-primary: #00d4ff;           /* Bright cyan - main accent */
  --color-primary-dark: #00a8cc;      /* Darker cyan - hover states */
  --color-primary-light: #4dd9ff;     /* Lighter cyan - lighter elements */
  --color-primary-rgb: 0, 212, 255;   /* RGB value for rgba usage */

  /* ---- SECONDARY COLORS ---- */
  --color-secondary: #6c63ff;         /* Purple secondary */
  --color-secondary-dark: #5a4eff;    /* Darker purple */
  --color-secondary-light: #8b7fff;   /* Lighter purple */
  --color-secondary-rgb: 108, 99, 255; /* RGB value for rgba usage */

  /* ---- BACKGROUND COLORS ---- */
  --bg-primary: #0f1419;              /* Darkest background */
  --bg-secondary: #1a1f2e;            /* Secondary dark background */
  --bg-tertiary: #252d3d;             /* Tertiary background */
  --bg-overlay: rgba(0, 0, 0, 0.55);  /* Semi-transparent overlay */
  --bg-gradient: linear-gradient(135deg, #1e1f36, #2b2c4a); /* Gradient background */

  /* ---- SURFACE COLORS (Cards, Panels) ---- */
  --surface-primary: #1a1f2e;         /* Primary surface/card background */
  --surface-secondary: #252d3d;       /* Secondary surface background */
  --surface-elevated: #2f3847;        /* Elevated surfaces (modals, dropdowns) */
  --surface-hover: #3a4553;           /* Surface hover state */

  /* ---- TEXT COLORS ---- */
  --text-primary: #ffffff;            /* Primary text - high contrast */
  --text-secondary: #b0b8c1;          /* Secondary text - medium contrast */
  --text-tertiary: #7a8393;           /* Tertiary text - low contrast */
  --text-disabled: #4a5568;           /* Disabled text */
  --text-inverse: #0f1419;            /* Inverse text (for light backgrounds) */

  /* ---- ACCENT TEXT COLORS ---- */
  --text-accent: #00d4ff;             /* Cyan accent text */
  --text-accent-dark: #00a8cc;        /* Darker cyan text */
  --text-success: #28a745;            /* Success text */
  --text-warning: #ffc107;            /* Warning text */
  --text-danger: #dc3545;             /* Danger/error text */
  --text-info: #17a2b8;               /* Info text */

  /* ---- BORDER COLORS ---- */
  --border-primary: #3a4553;          /* Primary border */
  --border-secondary: #2f3847;        /* Secondary border */
  --border-accent: #00d4ff;           /* Cyan accent border */
  --border-subtle: rgba(176, 184, 193, 0.1); /* Subtle border */
  --border-strong: rgba(176, 184, 193, 0.3); /* Strong border */

  /* ---- DIVIDER COLORS ---- */
  --divider-primary: rgba(176, 184, 193, 0.15);
  --divider-secondary: rgba(176, 184, 193, 0.08);

  /* ---- STATUS COLORS ---- */
  --status-success: #28a745;
  --status-success-bg: rgba(40, 167, 69, 0.1);
  --status-warning: #ffc107;
  --status-warning-bg: rgba(255, 193, 7, 0.1);
  --status-danger: #dc3545;
  --status-danger-bg: rgba(220, 53, 69, 0.1);
  --status-info: #17a2b8;
  --status-info-bg: rgba(23, 162, 184, 0.1);

  /* ---- SHADOW COLORS ---- */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);

  /* ============================================================================
     TYPOGRAPHY SYSTEM
     ============================================================================ */
  
  /* ---- FONT FAMILIES ---- */
  --font-primary: 'Rubik', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  /* ---- FONT SIZES ---- */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */

  /* ---- FONT WEIGHTS ---- */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* ---- LINE HEIGHTS ---- */
  --line-height-none: 1;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* ---- LETTER SPACING ---- */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;
  --letter-spacing-wider: 0.05em;

  /* ============================================================================
     SPACING SYSTEM (8px base unit)
     ============================================================================ */
  
  --spacing-0: 0;
  --spacing-1: 0.25rem;    /* 4px */
  --spacing-2: 0.5rem;     /* 8px */
  --spacing-3: 0.75rem;    /* 12px */
  --spacing-4: 1rem;       /* 16px */
  --spacing-5: 1.25rem;    /* 20px */
  --spacing-6: 1.5rem;     /* 24px */
  --spacing-8: 2rem;       /* 32px */
  --spacing-10: 2.5rem;    /* 40px */
  --spacing-12: 3rem;      /* 48px */
  --spacing-16: 4rem;      /* 64px */
  --spacing-20: 5rem;      /* 80px */
  --spacing-24: 6rem;      /* 96px */

  /* ============================================================================
     BORDER RADIUS
     ============================================================================ */
  
  --radius-none: 0;
  --radius-xs: 0.25rem;      /* 4px */
  --radius-sm: 0.375rem;     /* 6px */
  --radius-base: 0.5rem;     /* 8px */
  --radius-md: 0.75rem;      /* 12px */
  --radius-lg: 1rem;         /* 16px */
  --radius-xl: 1.5rem;       /* 24px */
  --radius-2xl: 2rem;        /* 32px */
  --radius-full: 9999px;     /* Circular */

  /* ============================================================================
     TRANSITIONS
     ============================================================================ */
  
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* ============================================================================
     Z-INDEX SCALE
     ============================================================================ */
  
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ============================================================================
   LIGHT MODE SUPPORT (Optional - for future use)
   ============================================================================ */
@media (prefers-color-scheme: light) {
  :root {
    /* This can be enabled in the future for light mode support */
  }
}

/* ============================================================================
   GLOBAL BASE STYLES USING THEME TOKENS
   ============================================================================ */

html {
  color-scheme: dark;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
}

/* ---- Headings ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin: 0 0 var(--spacing-4) 0;
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

/* ---- Paragraphs & Text ---- */
p {
  margin: 0 0 var(--spacing-4) 0;
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ---- Links ---- */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:active {
  color: var(--color-primary-dark);
}

/* ---- Code Elements ---- */
code, pre {
  font-family: var(--font-mono);
  background-color: var(--surface-secondary);
  border-radius: var(--radius-base);
}

code {
  padding: var(--spacing-1) var(--spacing-2);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
}

pre {
  padding: var(--spacing-4);
  overflow-x: auto;
  line-height: var(--line-height-relaxed);
}

/* ============================================================================
   COMPONENT THEME STYLES
   ============================================================================ */

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

.card:hover {
  background-color: var(--surface-secondary);
  box-shadow: var(--shadow-md);
}

.card-header {
  background-color: transparent;
  border-bottom: 1px solid var(--border-primary);
  padding: var(--spacing-6);
}

.card-body {
  padding: var(--spacing-6);
}

.card-footer {
  background-color: transparent;
  border-top: 1px solid var(--border-primary);
  padding: var(--spacing-6);
}

/* ---- Buttons ---- */
.btn {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-light);
}

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-light);
}

.btn-outline-primary {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
}

.btn-outline-primary:hover:not(:disabled) {
  background-color: rgba(0, 212, 255, 0.1);
}

/* ---- Inputs & Forms ---- */
.form-control,
.form-select,
textarea.form-control {
  background-color: var(--surface-secondary);
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  font-family: var(--font-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  padding: var(--spacing-3) var(--spacing-4);
}

.form-control:focus,
.form-select:focus,
textarea.form-control:focus {
  background-color: var(--surface-secondary);
  border-color: var(--color-primary);
  color: var(--text-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-control::placeholder {
  color: var(--text-tertiary);
}

.form-label {
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-2);
}

/* ---- Badges ---- */
.badge {
  font-family: var(--font-secondary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  padding: var(--spacing-1) var(--spacing-3);
}

.badge-primary {
  background-color: rgba(0, 212, 255, 0.2);
  color: var(--color-primary);
}

.badge-secondary {
  background-color: rgba(108, 99, 255, 0.2);
  color: var(--color-secondary-light);
}

.badge-success {
  background-color: rgba(40, 167, 69, 0.2);
  color: var(--status-success);
}

.badge-danger {
  background-color: rgba(220, 53, 69, 0.2);
  color: var(--status-danger);
}

.badge-warning {
  background-color: rgba(255, 193, 7, 0.2);
  color: var(--status-warning);
}

/* ---- Alerts ---- */
.alert {
  border-radius: var(--radius-lg);
  border: 1px solid;
  padding: var(--spacing-4) var(--spacing-6);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.alert-primary {
  background-color: rgba(0, 212, 255, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
}

.alert-success {
  background-color: var(--status-success-bg);
  border-color: var(--status-success);
  color: var(--status-success);
}

.alert-danger {
  background-color: var(--status-danger-bg);
  border-color: var(--status-danger);
  color: var(--status-danger);
}

.alert-warning {
  background-color: var(--status-warning-bg);
  border-color: var(--status-warning);
  color: var(--status-warning);
}

.alert-info {
  background-color: var(--status-info-bg);
  border-color: var(--status-info);
  color: var(--status-info);
}

/* ---- Tables ---- */
.table {
  color: var(--text-primary);
  border-color: var(--border-primary);
}

.table-dark {
  background-color: var(--surface-primary);
  color: var(--text-primary);
}

.table > thead > tr > th {
  border-bottom: 2px solid var(--border-primary);
  background-color: var(--surface-secondary);
  color: var(--text-secondary);
  font-weight: var(--font-weight-semibold);
}

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

.table > tbody > tr:hover {
  background-color: var(--surface-secondary);
}

/* ---- Modals ---- */
.modal-content {
  background-color: var(--surface-primary);
  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-xl);
}

.modal-header {
  background-color: var(--surface-secondary);
  border-bottom: 1px solid var(--border-primary);
  color: var(--text-primary);
}

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

/* ---- Dropdowns ---- */
.dropdown-menu {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.dropdown-item {
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.dropdown-item.active {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

/* ---- Navigation ---- */
.navbar {
  background-color: var(--surface-primary);
  border-bottom: 1px solid var(--border-primary);
}

.nav-link {
  color: var(--text-secondary) !important;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary) !important;
}

.nav-link.active {
  color: var(--color-primary) !important;
  border-bottom: 2px solid var(--color-primary);
}

/* ---- Pagination ---- */
.pagination {
  background-color: transparent;
}

.page-link {
  background-color: var(--surface-secondary);
  border: 1px solid var(--border-primary);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.page-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--text-inverse);
}

.page-link.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ---- Progress Bars ---- */
.progress {
  background-color: var(--surface-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.progress-bar.bg-success {
  background-color: var(--status-success) !important;
}

.progress-bar.bg-danger {
  background-color: var(--status-danger) !important;
}

.progress-bar.bg-warning {
  background-color: var(--status-warning) !important;
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

/* ---- Text Utilities ---- */
.text-primary {
  color: var(--text-primary) !important;
}

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

.text-tertiary {
  color: var(--text-tertiary) !important;
}

.text-muted {
  color: var(--text-disabled) !important;
}

.text-accent {
  color: var(--color-primary) !important;
}

.text-success {
  color: var(--status-success) !important;
}

.text-danger {
  color: var(--status-danger) !important;
}

.text-warning {
  color: var(--status-warning) !important;
}

.text-info {
  color: var(--status-info) !important;
}

/* ---- Background Utilities ---- */
.bg-primary {
  background-color: var(--bg-primary) !important;
}

.bg-secondary {
  background-color: var(--bg-secondary) !important;
}

.bg-surface {
  background-color: var(--surface-primary) !important;
}

.bg-surface-secondary {
  background-color: var(--surface-secondary) !important;
}

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

.bg-success {
  background-color: var(--status-success) !important;
}

.bg-danger {
  background-color: var(--status-danger) !important;
}

.bg-warning {
  background-color: var(--status-warning) !important;
}

.bg-info {
  background-color: var(--status-info) !important;
}

/* ---- Border Utilities ---- */
.border-primary {
  border-color: var(--border-primary) !important;
}

.border-accent {
  border-color: var(--color-primary) !important;
}

.border-subtle {
  border-color: var(--border-subtle) !important;
}

/* ---- Spacing Utilities (examples) ---- */
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }

.m-1 { margin: var(--spacing-1); }
.m-2 { margin: var(--spacing-2); }
.m-3 { margin: var(--spacing-3); }
.m-4 { margin: var(--spacing-4); }
.m-6 { margin: var(--spacing-6); }

.gap-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

/* ============================================================================
   ACCESSIBILITY & RESPONSIVE UTILITIES
   ============================================================================ */

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print styles */
@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
}