/*
 * Sinowealth Distributor Website - Main CSS
 * Contains global styles, variables and base elements
 */

/* CSS Variables - Following the design specifications */
:root {
  /* Color variables - Updated to match specification */
  --primary-color: #0072ce;          /* Tech blue as specified */
  --primary-color-dark: #0056b3;     /* Darker blue */
  --primary-color-light: #e3f2fd;    /* Light blue background */
  --secondary-color: #f8f9fa;        /* Neutral gray background as specified */
  --accent-color: #ff6b35;           /* Orange CTA color as specified */
  --accent-color-dark: #d85a29;      /* Darker orange */
  --text-color: #333333;             /* Primary text */
  --text-color-light: #666666;       /* Secondary text */
  --text-color-lighter: #999999;     /* Tertiary text */
  --border-color: #e0e0e0;           /* Border color */
  --border-color-light: #f0f0f0;     /* Light border */
  --success-color: #28a745;          /* Success state */
  --warning-color: #ffc107;          /* Warning state */
  --danger-color: #dc3545;           /* Danger state */
  --white: #ffffff;                  /* Pure white */
  --black: #000000;                  /* Pure black */
  --gray-100: #f8f9fa;               /* Lightest gray */
  --gray-200: #e9ecef;               /* Light gray */
  --gray-300: #dee2e6;               /* Medium light gray */
  --gray-400: #ced4da;               /* Medium gray */
  --gray-500: #adb5bd;               /* Medium dark gray */
  --gray-600: #6c757d;               /* Dark gray */
  --gray-700: #495057;               /* Darker gray */
  --gray-800: #343a40;               /* Very dark gray */
  --gray-900: #212529;               /* Almost black gray */

  /* Spacing variables - Updated with more granular options */
  --spacing-xs: 0.25rem;             /* 4px */
  --spacing-sm: 0.5rem;              /* 8px */
  --spacing-md: 1rem;                /* 16px */
  --spacing-lg: 1.5rem;              /* 24px */
  --spacing-xl: 2rem;                /* 32px */
  --spacing-xxl: 3rem;               /* 48px */
  --spacing-xxxl: 4rem;              /* 64px */
  --spacing-xxxxl: 6rem;             /* 96px */
  --spacing-xxxxxl: 8rem;            /* 128px */

  /* Font size variables */
  --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-xxl: 1.5rem;           /* 24px */
  --font-size-xxxl: 2rem;            /* 32px */
  --font-size-xxxxl: 2.5rem;         /* 40px */
  --font-size-xxxxxl: 3rem;          /* 48px */

  /* Line height variables */
  --line-height-base: 1.5;
  --line-height-heading: 1.25;

  /* Breakpoint variables */
  --breakpoint-xs: 0;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-xxl: 1400px;

  /* Shadow variables - Updated to match specification */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);           /* Light shadow */
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.16);           /* Medium shadow as specified */
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.19);         /* Large shadow */
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.25);         /* Extra large shadow */

  /* Border radius variables - Updated to match specification */
  --border-radius-xs: 0.125rem;      /* 2px */
  --border-radius-sm: 0.25rem;       /* 4px */
  --border-radius-md: 0.5rem;        /* 8px as specified */
  --border-radius-lg: 0.75rem;       /* 12px as specified for components */
  --border-radius-xl: 1rem;          /* 16px */
  --border-radius-xxl: 1.5rem;       /* 24px */
  --border-radius-full: 9999px;      /* Full circle */

  /* Transition variables */
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-fast: 0.1s ease;

  /* Z-index variables */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;
  --z-index-toast: 1080;
}

/* Box sizing reset - Updated for better border calculations */
*, *::before, *::after {
  box-sizing: border-box;
}

/* Base styles with proper font stack */
:root {
  font-size: var(--font-size-base); /* Base font size */
}

body {
  margin: 0;
  font-family: 
    -apple-system, 
    BlinkMacSystemFont, 
    'Segoe UI', 
    system-ui, 
    Roboto, 
    'Helvetica Neue', 
    Arial, 
    sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-color);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
}

/* Typography enhancements */
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-heading);
  font-weight: 600; /* Slightly bolder for better visual hierarchy */
  letter-spacing: -0.025em; /* Tighter letter spacing for headings */
  color: var(--gray-900);
}

h1 {
  font-size: var(--font-size-xxxxl);
  line-height: 1.1; /* Very tight line height for large headings */
}

h2 {
  font-size: var(--font-size-xxxl);
  line-height: 1.15;
}

h3 {
  font-size: var(--font-size-xxl);
  line-height: 1.2;
}

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

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

h6 {
  font-size: var(--font-size-base);
  font-weight: 500;
}

/* Paragraph and text elements */
p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-base);
  color: var(--text-color-light);
}

p.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
  font-weight: 400;
}

/* Links with proper color accessibility */
a {
  color: var(--primary-color);
  text-decoration: none;
  background-color: transparent;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

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

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  text-decoration: underline;
}

/* Content elements */
hr {
  margin: var(--spacing-xl) 0;
  color: inherit;
  border: 0;
  border-top: 1px solid var(--border-color);
  opacity: 0.25;
}

/* Code elements */
code {
  font-size: var(--font-size-sm);
  color: var(--danger-color);
  word-wrap: break-word;
}

pre {
  display: block;
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  overflow: auto;
  font-size: var(--font-size-sm);
  color: var(--gray-900);
  background-color: var(--gray-100);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
}

/* Lists */
ul, ol {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

ul ul, ul ol, ol ul, ol ol {
  margin-bottom: 0;
}

.list-unstyled {
  padding-left: 0;
  list-style: none;
}

.list-inline {
  padding-left: 0;
  list-style: none;
}

.list-inline-item {
  display: inline-block;
}

.list-inline-item:not(:last-child) {
  margin-right: var(--spacing-md);
}

/* Container with better spacing */
.container {
  width: 100%;
  padding-right: var(--spacing-md);
  padding-left: var(--spacing-md);
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
}

/* Fluid container */
.container-fluid {
  width: 100%;
  padding-right: var(--spacing-md);
  padding-left: var(--spacing-md);
  margin-right: auto;
  margin-left: auto;
}

/* Skip link for accessibility - Enhanced */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  z-index: var(--z-index-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Text utilities */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--gray-600) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--primary-color) !important; }
.text-light { color: var(--gray-100) !important; }
.text-dark { color: var(--gray-900) !important; }
.text-white { color: var(--white) !important; }
.text-body { color: var(--text-color) !important; }
.text-muted { color: var(--text-color-light) !important; }

/* Background utilities */
.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--gray-200) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-info { background-color: var(--primary-color) !important; }
.bg-light { background-color: var(--gray-100) !important; }
.bg-dark { background-color: var(--gray-800) !important; }
.bg-white { background-color: var(--white) !important; }
.bg-transparent { background-color: transparent !important; }

/* Display utilities */
.d-none { display: none !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-table { display: table !important; }
.d-table-row { display: table-row !important; }
.d-table-cell { display: table-cell !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }

/* Visually hidden for screen readers */
.visually-hidden,
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Responsive text alignment */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

@media (min-width: 576px) {
  .text-sm-center { text-align: center !important; }
  .text-sm-left { text-align: left !important; }
  .text-sm-right { text-align: right !important; }
}

@media (min-width: 768px) {
  .text-md-center { text-align: center !important; }
  .text-md-left { text-align: left !important; }
  .text-md-right { text-align: right !important; }
}

/* Image styles */
.img-fluid {
  max-width: 100%;
  height: auto;
}

/* Enhanced focus styles for accessibility */
a:focus,
input:focus,
select:focus,
textarea:focus,
button:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* No outline for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

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

/* Improved table styles */
.table {
  --bs-table-color: var(--text-color);
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--border-color);
  --bs-table-accent-bg: transparent;
  --bs-table-striped-color: var(--text-color);
  --bs-table-striped-bg: rgba(0, 0, 0, 0.05);
  --bs-table-active-color: var(--text-color);
  --bs-table-active-bg: rgba(0, 0, 0, 0.1);
  --bs-table-hover-color: var(--text-color);
  --bs-table-hover-bg: rgba(0, 114, 206, 0.075);
  width: 100%;
  margin-bottom: var(--spacing-lg);
  vertical-align: top;
  border-color: var(--table-border-color);
}

.table > :not(caption) > * > * {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bs-table-bg);
  border-bottom-width: 1px;
  box-shadow: inset 0 0 0 9999px var(--bs-table-accent-bg);
}

.table > tbody {
  vertical-align: inherit;
}

.table > thead {
  vertical-align: bottom;
}

.table-group-divider {
  border-top: 2px solid currentColor;
}

.caption-top {
  caption-side: top;
}

.table-sm > :not(caption) > * > * {
  padding: 0.25rem 0.25rem;
}

.table-bordered > :not(caption) > * {
  border-width: 1px 0;
}

.table-bordered > :not(caption) > * > * {
  border-width: 0 1px;
}

.table-borderless > :not(caption) > * > * {
  border-bottom-width: 0;
}

.table-borderless > :not(:first-child) {
  border-top-width: 0;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
  --bs-table-accent-bg: var(--bs-table-striped-bg);
  color: var(--bs-table-striped-color);
}

.table-striped-columns > :not(caption) > tr > :nth-child(even) {
  --bs-table-accent-bg: var(--bs-table-striped-bg);
  color: var(--bs-table-striped-color);
}

.table-active {
  --bs-table-accent-bg: var(--bs-table-active-bg);
  color: var(--bs-table-active-color);
}

.table-hover > tbody > tr:hover > * {
  --bs-table-accent-bg: var(--bs-table-hover-bg);
  color: var(--bs-table-hover-color);
}

.table-primary {
  --bs-table-color: #000;
  --bs-table-bg: #cfe2ff;
  --bs-table-border-color: #bacbe6;
  --bs-table-striped-bg: #c5d7f2;
  --bs-table-striped-color: #000;
  --bs-table-active-bg: #bacbe6;
  --bs-table-active-color: #000;
  --bs-table-hover-bg: #bfd1ec;
  --bs-table-hover-color: #000;
  color: var(--bs-table-color);
  border-color: var(--bs-table-border-color);
}

/* Form controls - Enhanced for better UX */
.form-control {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: var(--line-height-base);
  color: var(--text-color);
  background-color: var(--white);
  background-clip: padding-box;
  border: 1px solid var(--border-color);
  appearance: none;
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-control:focus {
  color: var(--text-color);
  background-color: var(--white);
  border-color: var(--primary-color);
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-control::placeholder {
  color: var(--text-color-lighter);
  opacity: 1;
}

.form-control:disabled {
  background-color: var(--gray-200);
  opacity: 1;
}

/* Button styles - Enhanced with modern design */
.btn {
  --bs-btn-padding-x: var(--spacing-lg);
  --bs-btn-padding-y: var(--spacing-sm);
  --bs-btn-font-family: ;
  --bs-btn-font-size: var(--font-size-base);
  --bs-btn-font-weight: 500;
  --bs-btn-line-height: var(--line-height-base);
  --bs-btn-color: var(--text-color);
  --bs-btn-bg: transparent;
  --bs-btn-border-width: 1px;
  --bs-btn-border-color: transparent;
  --bs-btn-border-radius: var(--border-radius-md);
  --bs-btn-hover-border-color: transparent;
  --bs-btn-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 1px rgba(0, 0, 0, 0.075);
  --bs-btn-disabled-opacity: 0.65;
  --bs-btn-focus-box-shadow: 0 0 0 0.25rem rgba(var(--bs-btn-focus-shadow-rgb), .5);
  display: inline-block;
  padding: var(--bs-btn-padding-y) var(--bs-btn-padding-x);
  font-family: var(--bs-btn-font-family);
  font-size: var(--bs-btn-font-size);
  font-weight: var(--bs-btn-font-weight);
  line-height: var(--bs-btn-line-height);
  color: var(--bs-btn-color);
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: var(--bs-btn-border-width) solid var(--bs-btn-border-color);
  border-radius: var(--bs-btn-border-radius);
  background-color: var(--bs-btn-bg);
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:hover {
  color: var(--bs-btn-hover-color);
  background-color: var(--bs-btn-hover-bg);
  border-color: var(--bs-btn-hover-border-color);
}

.btn-check + .btn:hover {
  color: var(--bs-btn-color);
  background-color: var(--bs-btn-bg);
  border-color: var(--bs-btn-border-color);
}

.btn:focus-visible {
  color: var(--bs-btn-hover-color);
  background-color: var(--bs-btn-hover-bg);
  border-color: var(--bs-btn-hover-border-color);
  outline: 0;
  box-shadow: var(--bs-btn-focus-box-shadow);
}

.btn-check:focus-visible + .btn {
  border-color: var(--bs-btn-hover-border-color);
  outline: 0;
  box-shadow: var(--bs-btn-focus-box-shadow);
}

.btn-check:checked + .btn, :not(.btn-check) + .btn:active, .btn:first-child:active, .btn.active, .btn.show {
  color: var(--bs-btn-active-color);
  background-color: var(--bs-btn-active-bg);
  border-color: var(--bs-btn-active-border-color);
}

.btn-check:checked + .btn:focus-visible, :not(.btn-check) + .btn:active:focus-visible, .btn:first-child:active:focus-visible, .btn.active:focus-visible, .btn.show:focus-visible {
  box-shadow: var(--bs-btn-focus-box-shadow);
}

.btn:disabled, .btn.disabled, fieldset:disabled .btn {
  color: var(--bs-btn-disabled-color);
  pointer-events: none;
  background-color: var(--bs-btn-disabled-bg);
  border-color: var(--bs-btn-disabled-border-color);
  opacity: var(--bs-btn-disabled-opacity);
}

/* Primary button - Tech Blue as specified */
.btn-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--primary-color);
  --bs-btn-border-color: var(--primary-color);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--primary-color-dark);
  --bs-btn-hover-border-color: var(--primary-color-dark);
  --bs-btn-focus-shadow-rgb: 49, 132, 253;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--primary-color-dark);
  --bs-btn-active-border-color: var(--primary-color-dark);
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #fff;
  --bs-btn-disabled-bg: var(--primary-color);
  --bs-btn-disabled-border-color: var(--primary-color);
}

/* Accent button - Orange CTA as specified */
.btn-accent {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--accent-color);
  --bs-btn-border-color: var(--accent-color);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--accent-color-dark);
  --bs-btn-hover-border-color: var(--accent-color-dark);
  --bs-btn-focus-shadow-rgb: 225, 83, 97;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--accent-color-dark);
  --bs-btn-active-border-color: var(--accent-color-dark);
  --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
  --bs-btn-disabled-color: #fff;
  --bs-btn-disabled-bg: var(--accent-color);
  --bs-btn-disabled-border-color: var(--accent-color);
}

/* Card component - Modern design with shadows and rounded corners */
.card {
  --bs-card-spacer-y: var(--spacing-xl);
  --bs-card-spacer-x: var(--spacing-xl);
  --bs-card-title-spacer-y: var(--spacing-md);
  --bs-card-border-width: 1px;
  --bs-card-border-color: var(--border-color-light);
  --bs-card-border-radius: var(--border-radius-lg);
  --bs-card-box-shadow: var(--shadow-sm);
  --bs-card-inner-border-radius: calc(var(--border-radius-lg) - 1px);
  --bs-card-cap-padding-y: var(--spacing-lg);
  --bs-card-cap-padding-x: var(--spacing-xl);
  --bs-card-cap-bg: rgba(var(--white-rgb), 0.85);
  --bs-card-cap-color: unset;
  --bs-card-height: ;
  --bs-card-color: unset;
  --bs-card-bg: var(--white);
  --bs-card-img-overlay-padding: var(--spacing-lg);
  --bs-card-group-margin: var(--spacing-md);
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: var(--bs-card-height);
  word-wrap: break-word;
  background-color: var(--bs-card-bg);
  background-clip: border-box;
  border: var(--bs-card-border-width) solid var(--bs-card-border-color);
  border-radius: var(--bs-card-border-radius);
  box-shadow: var(--bs-card-box-shadow);
}

.card > hr {
  margin-right: 0;
  margin-left: 0;
}

.card > .list-group {
  border-top: inherit;
  border-bottom: inherit;
}

.card > .list-group:first-child {
  border-top-width: 0;
  border-top-left-radius: var(--bs-card-inner-border-radius);
  border-top-right-radius: var(--bs-card-inner-border-radius);
}

.card > .list-group:last-child {
  border-bottom-width: 0;
  border-bottom-right-radius: var(--bs-card-inner-border-radius);
  border-bottom-left-radius: var(--bs-card-inner-border-radius);
}

.card > .card-header + .list-group,
.card > .list-group + .card-footer {
  border-top: 0;
}

.card-body {
  flex: 1 1 auto;
  padding: var(--bs-card-spacer-y) var(--bs-card-spacer-x);
  color: var(--bs-card-color);
}

.card-title {
  margin-bottom: var(--bs-card-title-spacer-y);
}

.card-subtitle {
  margin-top: calc(-.5 * var(--bs-card-title-spacer-y));
  margin-bottom: 0;
}

.card-text:last-child {
  margin-bottom: 0;
}

.card-link + .card-link {
  margin-left: var(--bs-card-spacer-x);
}

.card-header {
  padding: var(--bs-card-cap-padding-y) var(--bs-card-cap-padding-x);
  margin-bottom: 0;
  color: var(--bs-card-cap-color);
  background-color: var(--bs-card-cap-bg);
  border-bottom: var(--bs-card-border-width) solid var(--bs-card-border-color);
}

.card-header:first-child {
  border-radius: var(--bs-card-inner-border-radius) var(--bs-card-inner-border-radius) 0 0;
}

.card-footer {
  padding: var(--bs-card-cap-padding-y) var(--bs-card-cap-padding-x);
  color: var(--bs-card-cap-color);
  background-color: var(--bs-card-cap-bg);
  border-top: var(--bs-card-border-width) solid var(--bs-card-border-color);
}

.card-footer:last-child {
  border-radius: 0 0 var(--bs-card-inner-border-radius) var(--bs-card-inner-border-radius);
}

.card-header-tabs {
  margin-right: calc(-.5 * var(--bs-card-cap-padding-x));
  margin-bottom: calc(-1 * var(--bs-card-cap-padding-y));
  margin-left: calc(-.5 * var(--bs-card-cap-padding-x));
  border-bottom: 0;
}

.card-header-tabs .nav-link.active {
  background-color: var(--bs-card-bg);
  border-bottom-color: var(--bs-card-bg);
}

.card-header-pills {
  margin-right: calc(-.5 * var(--bs-card-cap-padding-x));
  margin-left: calc(-.5 * var(--bs-card-cap-padding-x));
}

.card-img-overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: var(--bs-card-img-overlay-padding);
  border-radius: var(--bs-card-inner-border-radius);
}

.card-img,
.card-img-top,
.card-img-bottom {
  width: 100%;
}

.card-img,
.card-img-top {
  border-top-left-radius: var(--bs-card-inner-border-radius);
  border-top-right-radius: var(--bs-card-inner-border-radius);
}

.card-img,
.card-img-bottom {
  border-bottom-right-radius: var(--bs-card-inner-border-radius);
  border-bottom-left-radius: var(--bs-card-inner-border-radius);
}

/* Alert styles */
.alert {
  --bs-alert-bg: transparent;
  --bs-alert-padding-x: var(--spacing-lg);
  --bs-alert-padding-y: var(--spacing-md);
  --bs-alert-margin-bottom: var(--spacing-lg);
  --bs-alert-color: inherit;
  --bs-alert-border-color: transparent;
  --bs-alert-border: 1px solid var(--bs-alert-border-color);
  --bs-alert-border-radius: var(--border-radius-md);
  position: relative;
  padding: var(--bs-alert-padding-y) var(--bs-alert-padding-x);
  margin-bottom: var(--bs-alert-margin-bottom);
  color: var(--bs-alert-color);
  background-color: var(--bs-alert-bg);
  border: var(--bs-alert-border);
  border-radius: var(--alert-border-radius);
}

/* Grid system - 12-column CSS Grid as specified */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-gap: var(--spacing-md);
}

.grid .col-1 { grid-column: span 1 / span 1; }
.grid .col-2 { grid-column: span 2 / span 2; }
.grid .col-3 { grid-column: span 3 / span 3; }
.grid .col-4 { grid-column: span 4 / span 4; }
.grid .col-5 { grid-column: span 5 / span 5; }
.grid .col-6 { grid-column: span 6 / span 6; }
.grid .col-7 { grid-column: span 7 / span 7; }
.grid .col-8 { grid-column: span 8 / span 8; }
.grid .col-9 { grid-column: span 9 / span 9; }
.grid .col-10 { grid-column: span 10 / span 10; }
.grid .col-11 { grid-column: span 11 / span 11; }
.grid .col-12 { grid-column: span 12 / span 12; }

/* Responsive grid columns */
@media (min-width: 576px) {
  .grid .col-sm-1 { grid-column: span 1 / span 1; }
  .grid .col-sm-2 { grid-column: span 2 / span 2; }
  .grid .col-sm-3 { grid-column: span 3 / span 3; }
  .grid .col-sm-4 { grid-column: span 4 / span 4; }
  .grid .col-sm-5 { grid-column: span 5 / span 5; }
  .grid .col-sm-6 { grid-column: span 6 / span 6; }
  .grid .col-sm-7 { grid-column: span 7 / span 7; }
  .grid .col-sm-8 { grid-column: span 8 / span 8; }
  .grid .col-sm-9 { grid-column: span 9 / span 9; }
  .grid .col-sm-10 { grid-column: span 10 / span 10; }
  .grid .col-sm-11 { grid-column: span 11 / span 11; }
  .grid .col-sm-12 { grid-column: span 12 / span 12; }
}

@media (min-width: 768px) {
  .grid .col-md-1 { grid-column: span 1 / span 1; }
  .grid .col-md-2 { grid-column: span 2 / span 2; }
  .grid .col-md-3 { grid-column: span 3 / span 3; }
  .grid .col-md-4 { grid-column: span 4 / span 4; }
  .grid .col-md-5 { grid-column: span 5 / span 5; }
  .grid .col-md-6 { grid-column: span 6 / span 6; }
  .grid .col-md-7 { grid-column: span 7 / span 7; }
  .grid .col-md-8 { grid-column: span 8 / span 8; }
  .grid .col-md-9 { grid-column: span 9 / span 9; }
  .grid .col-md-10 { grid-column: span 10 / span 10; }
  .grid .col-md-11 { grid-column: span 11 / span 11; }
  .grid .col-md-12 { grid-column: span 12 / span 12; }
}

@media (min-width: 992px) {
  .grid .col-lg-1 { grid-column: span 1 / span 1; }
  .grid .col-lg-2 { grid-column: span 2 / span 2; }
  .grid .col-lg-3 { grid-column: span 3 / span 3; }
  .grid .col-lg-4 { grid-column: span 4 / span 4; }
  .grid .col-lg-5 { grid-column: span 5 / span 5; }
  .grid .col-lg-6 { grid-column: span 6 / span 6; }
  .grid .col-lg-7 { grid-column: span 7 / span 7; }
  .grid .col-lg-8 { grid-column: span 8 / span 8; }
  .grid .col-lg-9 { grid-column: span 9 / span 9; }
  .grid .col-lg-10 { grid-column: span 10 / span 10; }
  .grid .col-lg-11 { grid-column: span 11 / span 11; }
  .grid .col-lg-12 { grid-column: span 12 / span 12; }
}

/* Flexbox utilities */
.d-flex {
  display: flex !important;
}

.d-inline-flex {
  display: inline-flex !important;
}

.flex-row {
  flex-direction: row !important;
}

.flex-column {
  flex-direction: column !important;
}

.flex-wrap {
  flex-wrap: wrap !important;
}

.flex-nowrap {
  flex-wrap: nowrap !important;
}

.justify-content-start {
  justify-content: flex-start !important;
}

.justify-content-end {
  justify-content: flex-end !important;
}

.justify-content-center {
  justify-content: center !important;
}

.justify-content-between {
  justify-content: space-between !important;
}

.justify-content-around {
  justify-content: space-around !important;
}

.justify-content-evenly {
  justify-content: space-evenly !important;
}

.align-items-start {
  align-items: flex-start !important;
}

.align-items-end {
  align-items: flex-end !important;
}

.align-items-center {
  align-items: center !important;
}

.align-items-baseline {
  align-items: baseline !important;
}

.align-items-stretch {
  align-items: stretch !important;
}

.align-content-start {
  align-content: flex-start !important;
}

.align-content-end {
  align-content: flex-end !important;
}

.align-content-center {
  align-content: center !important;
}

.align-content-between {
  align-content: space-between !important;
}

.align-content-around {
  align-content: space-around !important;
}

.align-content-stretch {
  align-content: stretch !important;
}

.align-self-auto {
  align-self: auto !important;
}

.align-self-start {
  align-self: flex-start !important;
}

.align-self-end {
  align-self: flex-end !important;
}

.align-self-center {
  align-self: center !important;
}

.align-self-baseline {
  align-self: baseline !important;
}

.align-self-stretch {
  align-self: stretch !important;
}

/* Spacing utilities */
.m-0 { margin: 0 !important; }
.mt-0, .my-0 { margin-top: 0 !important; }
.mr-0, .mx-0 { margin-right: 0 !important; }
.mb-0, .my-0 { margin-bottom: 0 !important; }
.ml-0, .mx-0 { margin-left: 0 !important; }

.m-1 { margin: var(--spacing-xs) !important; }
.mt-1, .my-1 { margin-top: var(--spacing-xs) !important; }
.mr-1, .mx-1 { margin-right: var(--spacing-xs) !important; }
.mb-1, .my-1 { margin-bottom: var(--spacing-xs) !important; }
.ml-1, .mx-1 { margin-left: var(--spacing-xs) !important; }

.m-2 { margin: var(--spacing-sm) !important; }
.mt-2, .my-2 { margin-top: var(--spacing-sm) !important; }
.mr-2, .mx-2 { margin-right: var(--spacing-sm) !important; }
.mb-2, .my-2 { margin-bottom: var(--spacing-sm) !important; }
.ml-2, .mx-2 { margin-left: var(--spacing-sm) !important; }

.m-3 { margin: var(--spacing-md) !important; }
.mt-3, .my-3 { margin-top: var(--spacing-md) !important; }
.mr-3, .mx-3 { margin-right: var(--spacing-md) !important; }
.mb-3, .my-3 { margin-bottom: var(--spacing-md) !important; }
.ml-3, .mx-3 { margin-left: var(--spacing-md) !important; }

.m-4 { margin: var(--spacing-lg) !important; }
.mt-4, .my-4 { margin-top: var(--spacing-lg) !important; }
.mr-4, .mx-4 { margin-right: var(--spacing-lg) !important; }
.mb-4, .my-4 { margin-bottom: var(--spacing-lg) !important; }
.ml-4, .mx-4 { margin-left: var(--spacing-lg) !important; }

.m-5 { margin: var(--spacing-xl) !important; }
.mt-5, .my-5 { margin-top: var(--spacing-xl) !important; }
.mr-5, .mx-5 { margin-right: var(--spacing-xl) !important; }
.mb-5, .my-5 { margin-bottom: var(--spacing-xl) !important; }
.ml-5, .mx-5 { margin-left: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.pt-0, .py-0 { padding-top: 0 !important; }
.pr-0, .px-0 { padding-right: 0 !important; }
.pb-0, .py-0 { padding-bottom: 0 !important; }
.pl-0, .px-0 { padding-left: 0 !important; }

.p-1 { padding: var(--spacing-xs) !important; }
.pt-1, .py-1 { padding-top: var(--spacing-xs) !important; }
.pr-1, .px-1 { padding-right: var(--spacing-xs) !important; }
.pb-1, .py-1 { padding-bottom: var(--spacing-xs) !important; }
.pl-1, .px-1 { padding-left: var(--spacing-xs) !important; }

.p-2 { padding: var(--spacing-sm) !important; }
.pt-2, .py-2 { padding-top: var(--spacing-sm) !important; }
.pr-2, .px-2 { padding-right: var(--spacing-sm) !important; }
.pb-2, .py-2 { padding-bottom: var(--spacing-sm) !important; }
.pl-2, .px-2 { padding-left: var(--spacing-sm) !important; }

.p-3 { padding: var(--spacing-md) !important; }
.pt-3, .py-3 { padding-top: var(--spacing-md) !important; }
.pr-3, .px-3 { padding-right: var(--spacing-md) !important; }
.pb-3, .py-3 { padding-bottom: var(--spacing-md) !important; }
.pl-3, .px-3 { padding-left: var(--spacing-md) !important; }

.p-4 { padding: var(--spacing-lg) !important; }
.pt-4, .py-4 { padding-top: var(--spacing-lg) !important; }
.pr-4, .px-4 { padding-right: var(--spacing-lg) !important; }
.pb-4, .py-4 { padding-bottom: var(--spacing-lg) !important; }
.pl-4, .px-4 { padding-left: var(--spacing-lg) !important; }

.p-5 { padding: var(--spacing-xl) !important; }
.pt-5, .py-5 { padding-top: var(--spacing-xl) !important; }
.pr-5, .px-5 { padding-right: var(--spacing-xl) !important; }
.pb-5, .py-5 { padding-bottom: var(--spacing-xl) !important; }
.pl-5, .px-5 { padding-left: var(--spacing-xl) !important; }

/* Utilities for modern design */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-none { box-shadow: none !important; }

.rounded { border-radius: var(--border-radius-md) !important; }
.rounded-sm { border-radius: var(--border-radius-sm) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-circle { border-radius: 50% !important; }
.rounded-pill { border-radius: var(--border-radius-full) !important; }
.rounded-0 { border-radius: 0 !important; }

/* Fade-in animation for scroll effects */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  border: 0.25em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
  to { transform: rotate(360deg); }
}

/* Overlay */
.overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

/* Hidden elements */
.hidden {
  display: none !important;
}

/* Visible elements */
.visible {
  visibility: visible !important;
}

/* Clearfix */
.clearfix::after {
  display: block;
  clear: both;
  content: "";
}

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

/* Focusable elements for screen readers */
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}