/* ==========================================================================
   BASE CSS - Children's Toy Store
   A vibrant, playful, and trustworthy foundation
   ========================================================================== */

/* ==========================================================================
   CSS VARIABLES
   ========================================================================== */

:root {
  /* Colors - Vibrant & Cheerful Palette */
  --color-primary: #FFD500;        /* Bright Yellow */
  --color-primary-light: #FFE14D;
  --color-primary-dark: #E6C000;
  
  --color-secondary: #4FC3F7;      /* Sky Blue */
  --color-secondary-light: #81D4FA;
  --color-secondary-dark: #29B6F6;
  
  --color-accent-coral: #FF6B6B;   /* Coral Red */
  --color-accent-coral-light: #FF8787;
  --color-accent-coral-dark: #EE5A52;
  
  --color-accent-mint: #26DE81;    /* Mint Green */
  --color-accent-mint-light: #4ECCA3;
  --color-accent-mint-dark: #20BF6B;
  
  --color-success: #26DE81;        /* Mint Green */
  --color-warning: #FFD500;        /* Bright Yellow */
  --color-danger: #FF6B6B;         /* Coral Red */
  
  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-background: #FFFEF9;     /* Warm white */
  --color-background-alt: #FFF9E6; /* Light cream */
  
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-500: #9E9E9E;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;
  
  --color-text: #2C3E50;           /* Deep blue-gray for readability */
  --color-text-light: #5A6C7D;
  --color-text-muted: #8898AA;
  
  /* Typography */
  --font-family-base: 'Poppins', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Fredoka One', 'Comic Sans MS', 'Poppins', cursive, sans-serif;
  --font-family-accent: 'Baloo 2', 'Poppins', sans-serif;
  
  --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-size-6xl: 3.75rem;    /* 60px */
  
  --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-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;
  
  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius - Playful & Rounded */
  --radius-sm: 0.5rem;   /* 8px */
  --radius-md: 1rem;     /* 16px */
  --radius-lg: 1.5rem;   /* 24px */
  --radius-xl: 2rem;     /* 32px */
  --radius-2xl: 2.5rem;  /* 40px */
  --radius-full: 9999px;
  
  /* Shadows - Soft & Friendly */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px -4px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 24px -6px rgba(0, 0, 0, 0.15);
  --shadow-2xl: 0 20px 40px -8px rgba(0, 0, 0, 0.2);
  --shadow-playful: 0 8px 20px rgba(255, 213, 0, 0.3), 0 4px 8px rgba(79, 195, 247, 0.2);
  --shadow-button: 0 4px 12px rgba(255, 213, 0, 0.4);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* 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;
}

/* ==========================================================================
   RESET & NORMALIZE
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  text-align: left;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove default margins */
h1, h2, h3, h4, h5, h6,
p, blockquote, pre,
ul, ol, dl,
figure, fieldset {
  margin: 0;
  padding: 0;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Responsive media */
img,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

img {
  border-style: none;
}

/* Forms */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: inherit;
  margin: 0;
}

button,
select {
  text-transform: none;
}

button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
  cursor: pointer;
}

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

textarea {
  resize: vertical;
}

/* Tables */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ==========================================================================
   BASE STYLES
   ========================================================================== */

/* Headings - Playful & Vibrant */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--font-size-5xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
  font-family: var(--font-family-accent);
}

h5 {
  font-size: var(--font-size-xl);
  font-family: var(--font-family-accent);
}

h6 {
  font-size: var(--font-size-lg);
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-semibold);
}

@media (max-width: 768px) {
  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); }
}

/* Paragraphs */
p {
  margin-bottom: var(--space-4);
  }

p:last-child {
  margin-bottom: 0;
}

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

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

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Strong & Emphasis */
strong, b {
  font-weight: var(--font-weight-bold);
}

em, i {
  font-style: italic;
}

/* Small text */
small {
  font-size: var(--font-size-sm);
}

/* Code */
code,
kbd,
pre,
samp {
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
}

code {
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-gray-100);
  border-radius: var(--radius-sm);
}

/* Horizontal Rule */
hr {
  margin: var(--space-8) 0;
  border: 0;
  border-top: 2px dashed var(--color-gray-300);
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-fluid {
  width: 100%;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 768px) {
  .container,
  .container-fluid,
  }

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-inline {
  display: inline-flex;
}

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

.flex-col {
  flex-direction: column;
}

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

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

.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;
}

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

.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); }

/* Grid Utilities */
.grid {
  display: grid;
}

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

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

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* 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-dark); }
.text-secondary { color: var(--color-secondary); }
.text-coral { color: var(--color-accent-coral); }
.text-mint { color: var(--color-accent-mint); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-muted { color: var(--color-text-muted); }

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

/* Display Utilities */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }

/* 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-width: 0;
}

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.my-8 { margin-top: var(--space-8); margin-bottom: var(--space-8); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* Buttons - Playful & Engaging */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-accent);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text)!important;
  border-color: var(--color-primary);
}

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

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
}

.btn-coral {
  background-color: var(--color-accent-coral);
  color: var(--color-white);
  border-color: var(--color-accent-coral);
}

.btn-coral:hover {
  background-color: var(--color-accent-coral-dark);
  border-color: var(--color-accent-coral-dark);
}

.btn-mint {
  background-color: var(--color-accent-mint);
  color: var(--color-white);
  border-color: var(--color-accent-mint);
}

.btn-mint:hover {
  background-color: var(--color-accent-mint-dark);
  border-color: var(--color-accent-mint-dark);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text);
  border-color: var(--color-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: transparent;
  box-shadow: none;
}

.btn-ghost:hover {
  background-color: var(--color-gray-100);
  box-shadow: none;
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-xl);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Form Elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-white);
  background-clip: padding-box;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-control:focus {
  color: var(--color-text);
  background-color: var(--color-white);
  border-color: var(--color-primary);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(255, 213, 0, 0.25);
}

.form-control:disabled,
.form-control[readonly] {
  background-color: var(--color-gray-100);
  opacity: 0.7;
  cursor: not-allowed;
}

textarea.form-control {
  min-height: 120px;
}

/* Select */
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%232C3E50' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  background-size: 12px;
  padding-right: var(--space-10);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-left: 0;
  margin-bottom: var(--space-3);
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.form-check-label {
  cursor: pointer;
  user-select: none;
}

/* Form Group */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-text {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Card Component - Playful & Rounded */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-playful);
  border-color: var(--color-primary-light);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-background-alt);
  border-bottom: 2px solid var(--color-gray-200);
  font-weight: var(--font-weight-semibold);
}

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

.card-footer {
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-gray-50);
  border-top: 2px solid var(--color-gray-200);
}

.card-title {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-family-accent);
}

.card-text {
  margin-bottom: var(--space-4);
}

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

.card-img {
  width: 100%;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-img-overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  color: var(--color-white);
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

.badge-primary { background-color: var(--color-primary); color: var(--color-text); }
.badge-secondary { background-color: var(--color-secondary); }
.badge-success { background-color: var(--color-success); }
.badge-danger { background-color: var(--color-danger); }
.badge-warning { background-color: var(--color-warning); color: var(--color-text); }

/* Alert */
.alert {
  position: relative;
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-4);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
}

.alert-success {
  color: #155724;
  background-color: #d4edda;
  border-color: var(--color-success);
}

.alert-danger {
  color: #721c24;
  background-color: #f8d7da;
  border-color: var(--color-danger);
}

.alert-warning {
  color: #856404;
  background-color: #fff3cd;
  border-color: var(--color-warning);
}

.alert-info {
  color: #004085;
  background-color: #d1ecf1;
  border-color: var(--color-secondary);
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

/* Focus Visible - Enhanced for playful design */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* Skip to main content */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: var(--font-weight-bold);
  z-index: var(--z-tooltip);
}

.skip-link:focus {
  top: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .btn,
  .card,
  .form-control,
  a {
    transition: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .btn,
  .form-control,
  .card {
    border-width: 3px;
  }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
  }
  
  img {
    page-break-inside: avoid;
    max-width: 100% !important;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}