/**
 * Main CSS for Renato Reis Portfolio Theme
 * 
 * Color Scheme:
 * - Primary Orange: #FF6B35
 * - Secondary Grey: #2C3E50
 * - Accent Orange: #E74C3C
 * - Light Grey: #ECF0F1
 * - Dark Grey: #34495E
 * - White: #FFFFFF
 */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */

:root {
  /* Colors */
  --color-primary: #FF6B35;
  --color-secondary: #2C3E50;
  --color-accent: #E74C3C;
  --color-light-grey: #ECF0F1;
  --color-dark-grey: #34495E;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-text: #34495E;
  --color-text-light: #7F8C8D;
  --color-background: #FFFFFF;
  --color-border: #E8E8E8;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-dark-grey) 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(255, 107, 53, 0.9) 0%, rgba(231, 76, 60, 0.9) 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', 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-size-6xl: 3.75rem;   /* 60px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Spacing */
  --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 */
  --space-32: 8rem;     /* 128px */
  
  /* Container */
  --container-width: 1200px;
  --container-padding: var(--space-6);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-secondary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-6) 0;
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-secondary);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
}

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

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
}

h5 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
}

h6 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

p {
  margin: 0 0 var(--space-6) 0;
  color: var(--color-text);
}

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

a:hover,
a:focus {
  color: var(--color-accent);
  text-decoration: underline;
}

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

strong, b {
  font-weight: var(--font-weight-semibold);
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-light-grey);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-mono);
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-6) 0;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-8);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-light-grey);
  font-style: italic;
  font-size: var(--font-size-xl);
}

/* ==========================================================================
   Layout Components
   ========================================================================== */

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

.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  font-family: var(--font-primary);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-8);
}

.nav-item {
  position: relative;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.language-switcher {
  display: flex;
  gap: var(--space-2);
}

.language-btn {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.language-btn:hover,
.language-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e9ecef" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-text {
  max-width: 600px;
}

.hero-greeting {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-tight);
}

.hero-name {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-8);
}

.hero-description {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-10);
  line-height: var(--line-height-relaxed);
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

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

.hero-stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  display: block;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Hero image placeholder styles */
.hero-image-placeholder {
    width: 400px;
    height: 500px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image-placeholder .image-content {
    text-align: center;
    color: white;
}

.hero-image-placeholder .profile-icon {
    margin-bottom: 1rem;
    opacity: 0.9;
}

.hero-image-placeholder p {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    opacity: 0.8;
}

.hero-image {
  width: 400px;
  height: 400px;
  border-radius: 50%;
  object-fit: cover;
  border: 8px solid var(--color-white);
  box-shadow: var(--shadow-2xl);
  position: relative;
  z-index: 2;
}

.hero-decorations {
  position: absolute;
  inset: 0;
}

.hero-decoration {
  position: absolute;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
}

.hero-decoration:nth-child(1) {
  width: 80px;
  height: 80px;
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.hero-decoration:nth-child(2) {
  width: 60px;
  height: 60px;
  top: 20%;
  right: 15%;
  animation-delay: 2s;
}

.hero-decoration:nth-child(3) {
  width: 100px;
  height: 100px;
  bottom: 15%;
  left: 5%;
  animation-delay: 4s;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  animation: bounce 2s infinite;
}

.scroll-indicator::after {
  content: '';
  width: 2px;
  height: 30px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

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

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

.btn-secondary:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

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

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

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-header {
  margin-bottom: var(--space-6);
}

.card-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
}

.card-content {
  margin-bottom: var(--space-6);
}

.card-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
}

/* ==========================================================================
   Grid System
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-8);
}

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

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

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ==========================================================================
   Expertise Section
   ========================================================================== */

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.expertise-card {
  position: relative;
  overflow: hidden;
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
}

.expertise-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--color-white);
  font-size: var(--font-size-2xl);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.tech-tag {
  background: var(--color-light-grey);
  color: var(--color-text);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   Work Section
   ========================================================================== */

.work-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.work-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.work-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.work-card:hover .work-image {
  transform: scale(1.05);
}

.work-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-overlay);
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

.work-card:hover .work-overlay {
  opacity: 1;
}

.work-info {
  padding: var(--space-6);
}

.work-category {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.work-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.work-description {
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.work-tag {
  background: var(--color-light-grey);
  color: var(--color-text);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.contact-method:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-xl);
}

.contact-details h4 {
  margin: 0 0 var(--space-1) 0;
  color: var(--color-secondary);
}

.contact-details p {
  margin: 0;
  color: var(--color-text-light);
}

.contact-form {
  background: var(--color-white);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: var(--space-6);
}

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-checkbox input {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-8) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
  color: var(--color-primary);
}

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-xl);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
  text-decoration: none;
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.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;
}

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

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

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-light { background-color: var(--color-light-grey); }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translateY(0); }
  40%, 43% { transform: translateY(-10px); }
  70% { transform: translateY(-5px); }
  90% { transform: translateY(-2px); }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Animation classes */
.animate-float { animation: float 6s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-bounce { animation: bounce 2s infinite; }
.animate-slide-up { animation: slideInUp 0.6s ease-out; }
.animate-slide-left { animation: slideInLeft 0.6s ease-out; }
.animate-slide-right { animation: slideInRight 0.6s ease-out; }