/* ============================================================================
   Stakemix.Shop - Casino Mathematics & Probability Analysis
   CSS Stylesheet - Mobile-First Responsive Design
   ============================================================================ */

/* ============================================================================
   1. CSS VARIABLES & ROOT STYLES
   ============================================================================ */

:root {
  --color-primary: #1a1a2e;
  --color-secondary: #16213e;
  --color-accent: #ab8e2c;
  --color-background: #f8f9fa;
  --color-text: #2c3e50;
  --color-text-light: #5a6c7d;
  --color-border: #e0e4e8;
  --color-white: #ffffff;
  
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.12);
  --shadow-lg: 0 8px 24px rgba(26, 26, 46, 0.16);
  --shadow-hover: 0 12px 32px rgba(26, 26, 46, 0.20);
  
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  --transition-standard: 0.3s ease-in-out;
  --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   2. GLOBAL STYLES
   ============================================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  overflow-x: hidden;
}

/* ============================================================================
   3. TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.25px;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
}

h5 {
  font-size: 1.1rem;
  font-weight: 600;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-standard);
}

a:hover {
  color: #9a7a1e;
}

/* ============================================================================
   4. BUTTONS & INTERACTIVE ELEMENTS
   ============================================================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-standard);
  text-decoration: none;
  vertical-align: middle;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: #9a7a1e;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.btn-secondary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

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

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.1rem;
  font-weight: 600;
}

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

/* ============================================================================
   5. ICON STYLES
   ============================================================================ */

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

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

/* ============================================================================
   6. HEADER & NAVIGATION
   ============================================================================ */

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

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), #9a7a1e);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
}

.tagline {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-family: var(--font-body);
  font-weight: 400;
  margin-top: -0.25rem;
}

.nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-standard);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* ============================================================================
   7. HERO SECTION
   ============================================================================ */

.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(171, 142, 44, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(171, 142, 44, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero-icon {
  display: block;
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-body);
  font-weight: 300;
}

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

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================================
   8. SECTION LAYOUTS
   ============================================================================ */

.section {
  padding: var(--spacing-2xl) var(--spacing-md);
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.75rem;
  left: 50%;
  transform: translateX(-50%);