/* ==========================================================================
   Luckysprite.Shop - Casino Information Website
   House Edge Analysis - Responsive CSS Stylesheet
   ========================================================================== */

/* ==========================================================================
   ROOT & TYPOGRAPHY
   ========================================================================== */

:root {
  --color-primary: #1a1a2e;
  --color-secondary: #0f3460;
  --color-accent: #a98b2c;
  --color-background: #f5f5f5;
  --color-text: #1a1a2e;
  --color-text-light: #555555;
  --color-text-lighter: #888888;
  --color-white: #ffffff;
  --color-border: #e0e0e0;
  --color-shadow: rgba(26, 26, 46, 0.1);
  --color-shadow-dark: rgba(26, 26, 46, 0.15);
  
  --font-heading: 'IBM Plex Serif', serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 16px var(--color-shadow);
  --shadow-lg: 0 8px 24px var(--color-shadow-dark);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
  font-size: 16px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

h5 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-light);
  font-size: 1rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--color-secondary);
}

ul,
ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.row-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.row-2 {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.text-center {
  text-align: center;
}

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

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

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.py-lg {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.py-xl {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.py-xxl {
  padding-top: var(--spacing-xxl);
  padding-bottom: var(--spacing-xxl);
}

.hidden {
  display: none;
}

.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;
}

/* ==========================================================================
   ICONS
   ========================================================================== */

.casino-icon {
  width: 48px;
  height: 48px;
  display: inline-block;
  vertical-align: middle;
  margin-right: var(--spacing-md);
  fill: currentColor;
}

.hero .casino-icon {
  width: 64px;
  height: 64px;
  margin-right: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.section .casino-icon {
  width: 56px;
  height: 56px;
  margin-right: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.icon-group {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  vertical-align: middle;
}

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

.btn-primary:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

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

.btn-small {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.9rem;
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: 1.1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */

.header {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.5px;
  margin: 0;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav a {
  color: var(--color-text);
  font-weight: 500;
  padding-bottom: 4px;
  border-bottom: 3px solid transparent;
  transition: border-bottom 0.3s ease;
}

.nav a:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: all 0.3s ease;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-xxl) var(--spacing-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: