/* ============================================
   GGStories - Design System v1
   White & Clean Creative Writing Portfolio
   ============================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors */
  --color-white: #FFFFFF;
  --color-black: #0A0A0A;
  --color-gray-900: #1A1A1A;
  --color-gray-700: #4A4A4A;
  --color-gray-500: #6B6B6B;
  --color-gray-300: #D1D1D1;
  --color-gray-100: #F5F5F5;
  --color-gray-50: #FAFAFA;
  
  /* Category Accent Colors */
  --color-movies: #E63946;
  --color-music: #4361EE;
  --color-advertising: #F4A261;
  --color-documentaries: #2A9D8F;
  --color-copywriting: #7209B7;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-primary);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;
  
  /* Layout */
  --container-max: 1280px;
  --container-padding: 24px;
  
  /* Animation */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-dramatic: cubic-bezier(0.77, 0, 0.175, 1);
  
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 700ms;
  --duration-slower: 1000ms;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
  :root {
    /* Can be enabled later for dark mode */
  }
}

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

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

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-black);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

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

.text-display-xl {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.text-display-lg {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.text-h1 {
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.text-h2 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
}

.text-h3 {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.3;
}

.text-h4 {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.4;
}

.text-body-lg {
  font-size: 1.125rem;
  line-height: 1.6;
}

.text-body {
  font-size: 1rem;
  line-height: 1.6;
}

.text-small {
  font-size: 0.875rem;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.text-tiny {
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.text-muted {
  color: var(--color-gray-500);
}

/* ============================================
   Layout Utilities
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

@media (min-width: 640px) {
  :root {
    --container-padding: 32px;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: 48px;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-padding: 64px;
  }
}

.section {
  padding: var(--space-4xl) 0;
}

.section-sm {
  padding: var(--space-2xl) 0;
}

.section-lg {
  padding: var(--space-5xl) 0;
}

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

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

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

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

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

@media (min-width: 640px) {
  .grid-sm-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

@media (min-width: 1024px) {
  .grid-lg-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-lg-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-lg-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

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

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

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

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

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.gap-xl {
  gap: var(--space-xl);
}

/* ============================================
   Components - Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 16px 32px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out-expo);
  cursor: pointer;
}

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

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-black);
  border: 1px solid var(--color-black);
}

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

.btn-ghost {
  padding: 8px 0;
  position: relative;
  color: var(--color-black);
}

.btn-ghost::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-black);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.btn-ghost:hover::after {
  width: 100%;
}

/* ============================================
   Components - Cards
   ============================================ */

.card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-gray-50);
  transition: transform var(--duration-normal) var(--ease-out-expo),
              box-shadow var(--duration-normal) var(--ease-out-expo);
}

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

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

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

.card-content {
  padding: var(--space-lg);
}

/* Story Card */
.story-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
}

.story-card__image {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

.story-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slower) var(--ease-out-expo);
}

.story-card:hover .story-card__image img {
  transform: scale(1.08);
}

.story-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.8) 0%,
    rgba(0, 0, 0, 0.3) 40%,
    transparent 70%
  );
  transition: background var(--duration-normal) var(--ease-smooth);
}

.story-card:hover .story-card__overlay {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.9) 0%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.1) 100%
  );
}

.story-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-xl);
  color: var(--color-white);
  transform: translateY(20px);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.story-card:hover .story-card__content {
  transform: translateY(0);
}

.story-card__category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.story-card:hover .story-card__category {
  opacity: 1;
  transform: translateY(0);
}

.story-card__category-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.story-card__title {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.2;
}

/* Writer Card */
.writer-card {
  text-align: center;
  padding: var(--space-xl);
}

.writer-card__avatar {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  overflow: hidden;
  position: relative;
}

.writer-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter var(--duration-normal) var(--ease-smooth),
              transform var(--duration-normal) var(--ease-out-expo);
}

.writer-card:hover .writer-card__avatar img {
  filter: grayscale(0%);
  transform: scale(1.05);
}

.writer-card__name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.writer-card__role {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-md);
}

.writer-card__social {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.writer-card:hover .writer-card__social {
  opacity: 1;
  transform: translateY(0);
}

.writer-card__social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-gray-100);
  transition: background-color var(--duration-fast) var(--ease-smooth);
}

.writer-card__social a:hover {
  background-color: var(--color-gray-300);
}

/* Portfolio Item */
.portfolio-item {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-4xl);
}

@media (min-width: 768px) {
  .portfolio-item {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
  }
  
  .portfolio-item:nth-child(even) {
    direction: rtl;
  }
  
  .portfolio-item:nth-child(even) > * {
    direction: ltr;
  }
}

.portfolio-item__image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 3 / 2;
}

.portfolio-item__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.portfolio-item:hover .portfolio-item__image img {
  transform: scale(1.03);
}

.portfolio-item__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.portfolio-item__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.portfolio-item__category {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-100);
}

.portfolio-item__category--movies { color: var(--color-movies); }
.portfolio-item__category--music { color: var(--color-music); }
.portfolio-item__category--advertising { color: var(--color-advertising); }
.portfolio-item__category--documentaries { color: var(--color-documentaries); }
.portfolio-item__category--copywriting { color: var(--color-copywriting); }

.portfolio-item__year {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.portfolio-item__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

.portfolio-item__excerpt {
  color: var(--color-gray-500);
  line-height: 1.7;
}

/* ============================================
   Components - Category Tags
   ============================================ */

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  background-color: var(--color-gray-100);
  transition: all var(--duration-normal) var(--ease-smooth);
}

.category-tag:hover {
  transform: translateY(-2px);
}

.category-tag__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.category-tag--movies .category-tag__dot { background-color: var(--color-movies); }
.category-tag--music .category-tag__dot { background-color: var(--color-music); }
.category-tag--advertising .category-tag__dot { background-color: var(--color-advertising); }
.category-tag--documentaries .category-tag__dot { background-color: var(--color-documentaries); }
.category-tag--copywriting .category-tag__dot { background-color: var(--color-copywriting); }

/* ============================================
   Navigation
   ============================================ */

.navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.navigation.scrolled {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: var(--space-sm) 0;
}

.navigation__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navigation__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  z-index: 1001;
}

.navigation__logo span {
  font-weight: 400;
}

.navigation__menu {
  display: none;
}

@media (min-width: 768px) {
  .navigation__menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
  }
}

.navigation__link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  padding: var(--space-sm) 0;
}

.navigation__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-black);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.navigation__link:hover::after,
.navigation__link.active::after {
  width: 100%;
}

.navigation__cta {
  display: none;
}

@media (min-width: 768px) {
  .navigation__cta {
    display: flex;
  }
}

/* Mobile Menu Toggle */
.navigation__toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-sm);
  z-index: 1001;
}

@media (min-width: 768px) {
  .navigation__toggle {
    display: none;
  }
}

.navigation__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-black);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

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

.navigation__toggle.active span:nth-child(2) {
  opacity: 0;
}

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

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  background-color: var(--color-white);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.mobile-menu.active .mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.active .mobile-menu__link:nth-child(1) { transition-delay: 100ms; }
.mobile-menu.active .mobile-menu__link:nth-child(2) { transition-delay: 150ms; }
.mobile-menu.active .mobile-menu__link:nth-child(3) { transition-delay: 200ms; }
.mobile-menu.active .mobile-menu__link:nth-child(4) { transition-delay: 250ms; }
.mobile-menu.active .mobile-menu__link:nth-child(5) { transition-delay: 300ms; }

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero__container {
  width: 100%;
}

.hero__content {
  max-width: 900px;
}

.hero__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.hero__label-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-movies);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero__title {
  margin-bottom: var(--space-lg);
}

.hero__title-line {
  display: block;
  overflow: hidden;
}

.hero__title-line span {
  display: block;
  transform: translateY(100%);
  animation: slide-up-reveal 1s var(--ease-out-expo) forwards;
}

.hero__title-line:nth-child(1) span { animation-delay: 0.2s; }
.hero__title-line:nth-child(2) span { animation-delay: 0.35s; }

@keyframes slide-up-reveal {
  to {
    transform: translateY(0);
  }
}

.hero__description {
  max-width: 540px;
  font-size: 1.125rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-xl);
  opacity: 0;
  transform: translateY(20px);
  animation: fade-slide-up 0.8s var(--ease-out-expo) 0.6s forwards;
}

@keyframes fade-slide-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  opacity: 0;
  transform: translateY(20px);
  animation: fade-slide-up 0.8s var(--ease-out-expo) 0.8s forwards;
}

.hero__categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-3xl);
  opacity: 0;
  animation: fade-in 0.8s var(--ease-smooth) 1s forwards;
}

@keyframes fade-in {
  to { opacity: 1; }
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
  opacity: 0;
  animation: fade-in 0.8s var(--ease-smooth) 1.2s forwards;
}

.hero__scroll-indicator {
  width: 1px;
  height: 60px;
  background-color: var(--color-gray-300);
  position: relative;
  overflow: hidden;
}

.hero__scroll-indicator::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: var(--color-black);
  animation: scroll-line 2s var(--ease-out-expo) infinite;
}

@keyframes scroll-line {
  0% { transform: translateY(-100%); }
  50%, 100% { transform: translateY(200%); }
}

/* ============================================
   Section Headers
   ============================================ */

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-header__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
  margin-bottom: var(--space-md);
}

.section-header__title {
  max-width: 600px;
}

.section-header__description {
  max-width: 540px;
  margin-top: var(--space-md);
  color: var(--color-gray-500);
}

/* ============================================
   Stories Section
   ============================================ */

.stories-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .stories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .stories-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .stories-grid .story-card:first-child {
    grid-column: span 2;
  }
  
  .stories-grid .story-card:first-child .story-card__image {
    aspect-ratio: 16 / 9;
  }
}

/* ============================================
   Writers Section
   ============================================ */

.writers-grid {
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 640px) {
  .writers-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

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

.footer {
  background-color: var(--color-gray-100);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer__logo span {
  font-weight: 400;
}

.footer__description {
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-white);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.footer__social a:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.footer__column-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer__links a:hover {
  color: var(--color-black);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-gray-300);
}

@media (min-width: 640px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__copyright {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.footer__credits {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* ============================================
   Scroll Reveal Animations
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

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

.bg-gray { background-color: var(--color-gray-100); }
.bg-white { background-color: var(--color-white); }

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

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.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: 0;
}