/*!
 * Sunset Portfolio - Main Stylesheet
 * Version: 1.0
 * Created: February 2026
 * Theme: Sunset Ethereal Art Portfolio
 */

:root {
  /* ═══════════════════════════════════════════════════
     SUNSET COLOR PALETTE - The Core Visual Language
     ═══════════════════════════════════════════════════ */
  
  /* ═══ Golden Hour ═══ */
  --sunset-gold: #FFD700;
  --sunset-gold-light: #FFE550;
  --sunset-gold-dark: #C9A400;
  
  /* ═══ Vibrant Orange ═══ */
  --sunset-orange: #FF6B35;
  --sunset-orange-light: #FF8C5A;
  --sunset-orange-dark: #E55A20;
  
  /* ═══ Soft Coral & Peach ═══ */
  --sunset-coral: #FF8C69;
  --sunset-peach: #FFB07C;
  --sunset-apricot: #FFCBA4;
  
  /* ═══ Ethereal Pink ═══ */
  --sunset-pink: #FF69B4;
  --sunset-rose: #E75480;
  --sunset-magenta: #C71585;
  
  /* ═══ Twilight Purple ═══ */
  --sunset-purple: #8B5CF6;
  --sunset-purple-light: #A78BFA;
  --twilight-indigo: #4C1D95;
  
  /* ═══ Neutrals ═══ */
  --warm-cream: #FFF8F0;
  --warm-gray-100: #F5F0EB;
  --warm-gray-200: #E8E0D5;
  --warm-gray-400: #A8A29E;
  --warm-gray-600: #57534E;
  --deep-charcoal: #1F1F1F;
  --rich-black: #0A0A0A;
  
  /* ═══ Gradients ═══ */
  --gradient-sunset: linear-gradient(135deg, 
    var(--sunset-gold) 0%, 
    var(--sunset-orange) 25%, 
    var(--sunset-pink) 50%, 
    var(--sunset-purple) 75%, 
    var(--twilight-indigo) 100%
  );
  
  --gradient-vertical: linear-gradient(180deg,
    var(--warm-cream) 0%,
    var(--sunset-peach) 30%,
    var(--sunset-orange) 50%,
    var(--sunset-rose) 70%,
    var(--sunset-purple) 90%,
    var(--twilight-indigo) 100%
  );
  
  --gradient-hero: linear-gradient(135deg,
    #1E1B4B 0%,
    #4C1D95 20%,
    #C71585 40%,
    #E75480 60%,
    #FF6B35 80%,
    #FFD700 100%
  );
  
  --gradient-glow: radial-gradient(circle at center,
    rgba(255, 215, 0, 0.15) 0%,
    rgba(255, 107, 53, 0.1) 50%,
    rgba(139, 92, 246, 0.05) 100%
  );
  
  --gradient-text-shimmer: linear-gradient(90deg,
    var(--sunset-gold) 0%,
    var(--sunset-orange) 50%,
    var(--sunset-pink) 100%
  );
  
  /* ═══ Typography ═══ */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-heading: 'Cormorant Garamond', 'Palatino', serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-accent: 'Space Grotesk', sans-serif;
  
  /* ═══ Spacing ═══ */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;
  
  /* ═══ Shadows ═══ */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-gold: 0 0 30px rgba(255, 215, 0, 0.3);
  --shadow-orange: 0 0 40px rgba(255, 107, 53, 0.3);
  
  /* ═══ Transitions ═══ */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-ethereal: 1000ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* ═══ Border Radius ═══ */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --warm-cream: #0A0A0A;
  --warm-gray-100: #1F1F1F;
  --warm-gray-200: #2D2D2D;
  --warm-gray-400: #6B6B6B;
  --warm-gray-600: #D4D4D4;
  --deep-charcoal: #F5F0EB;
}

/* ═══════════════════════════════════════════════════
   BASE STYLES
   ═══════════════════════════════════════════════════ */

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--deep-charcoal);
  background-color: var(--warm-cream);
  overflow-x: hidden;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

[data-theme="dark"] body {
  color: var(--warm-gray-100);
  background-color: var(--rich-black);
}

/* Fixed Header Spacing */
main {
  padding-top: 80px;
}

@media (max-width: 992px) {
  main {
    padding-top: 70px;
  }
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* ═══════════════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════════════ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 2rem); }

p {
  margin-bottom: 1rem;
}

/* ═══════════════════════════════════════════════════
   UTILITY CLASSES
   ═══════════════════════════════════════════════════ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ═══════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) var(--space-xl);
  transition: all var(--transition-base);
  background: transparent;
}

.site-header.scrolled {
  background: rgba(255, 248, 240, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .site-header.scrolled {
  background: rgba(10, 10, 10, 0.95);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--deep-charcoal);
}

[data-theme="dark"] .nav-brand {
  color: var(--warm-cream);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--warm-gray-600);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-sunset);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--sunset-orange);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Dropdown Menu */
.has-dropdown {
  position: relative;
}

.has-dropdown > a::after {
  content: '';
  position: absolute;
  right: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid var(--warm-gray-400);
  transition: border-color var(--transition-base);
}

.has-dropdown > a:hover::after {
  border-top-color: var(--sunset-orange);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--warm-cream);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-md);
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  list-style: none;
  z-index: 100;
}

[data-theme="dark"] .nav-dropdown {
  background: var(--warm-gray-100);
}

.has-dropdown:hover .nav-dropdown,
.has-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown li {
  margin: 0;
}

.nav-dropdown a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  white-space: nowrap;
  color: var(--warm-gray-600);
  font-size: 0.9rem;
}

.nav-dropdown a:hover {
  color: var(--sunset-orange);
  background: var(--warm-gray-100);
  border-radius: var(--radius-sm);
}

.nav-dropdown a::after {
  display: none;
}

.nav-cta {
  padding: var(--space-sm) var(--space-lg);
  background: var(--gradient-sunset);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-sm);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--deep-charcoal);
  transition: all var(--transition-base);
}

[data-theme="dark"] .mobile-menu-toggle span {
  background: var(--warm-cream);
}

@media (max-width: 992px) {
  .site-header {
    padding: var(--space-sm) var(--space-lg);
  }
  
  .nav-brand {
    font-size: 1.25rem;
  }
  
  .nav-brand svg {
    width: 36px;
    height: 36px;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--warm-cream);
    flex-direction: column;
    justify-content: flex-start;
    padding: calc(80px + var(--space-2xl)) var(--space-xl) var(--space-xl);
    transition: right var(--transition-slow);
    overflow-y: auto;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .nav-links a {
    font-size: 1.1rem;
    padding: var(--space-md);
    display: block;
  }
  
  .has-dropdown {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .has-dropdown > a::after {
    display: none;
  }
  
  .nav-dropdown {
    position: static;
    transform: none;
    box-shadow: none;
    background: transparent;
    padding: var(--space-sm);
    opacity: 1;
    visibility: visible;
    display: none;
    text-align: center;
  }
  
  .has-dropdown.active .nav-dropdown {
    display: block;
  }
  
  .nav-dropdown a {
    font-size: 1rem;
    padding: var(--space-sm) var(--space-lg);
  }
  
  .nav-cta {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
    z-index: 1001;
  }
  
  .nav-links .nav-cta {
    display: inline-block;
    margin-top: var(--space-xl);
    padding: var(--space-md) var(--space-2xl);
    background: var(--gradient-sunset);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-align: center;
  }
  
  .nav-links .nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-orange);
  }
  
  .nav-links .nav-cta::after {
    display: none;
  }
}

/* ═══════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(15deg); }
}

.floating-elements {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.floating-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.floating-orb:nth-child(1) {
  width: 400px;
  height: 400px;
  background: var(--sunset-gold);
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.floating-orb:nth-child(2) {
  width: 300px;
  height: 300px;
  background: var(--sunset-pink);
  bottom: 20%;
  right: 15%;
  animation-delay: -3s;
}

.floating-orb:nth-child(3) {
  width: 250px;
  height: 250px;
  background: var(--sunset-purple);
  top: 40%;
  right: 25%;
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
  text-align: center;
  padding: var(--space-xl);
  max-width: 900px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  color: white;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.2s;
}

.hero-title .line {
  display: block;
}

.hero-title .highlight {
  background: var(--gradient-text-shimmer);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.4s;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.6s;
}

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

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  opacity: 0;
  animation: fadeUp 1s ease forwards 1s;
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(10px); }
  60% { transform: translateY(5px); }
}

/* ═══════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--gradient-sunset);
  color: white;
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--deep-charcoal);
  border: 2px solid var(--sunset-orange);
}

.btn-outline:hover {
  background: var(--sunset-orange);
  color: white;
}

/* ═══════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════ */

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
  color: var(--deep-charcoal);
}

[data-theme="dark"] .section-title {
  color: var(--warm-cream);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--warm-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

[data-theme="dark"] .section-subtitle {
  color: var(--warm-gray-400);
}

/* ═══════════════════════════════════════════════════
   PROJECT CARDS
   ═══════════════════════════════════════════════════ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: white;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(30px);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

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

.project-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30, 27, 75, 0.95) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-xl);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: white;
  margin-bottom: var(--space-xs);
}

.project-category {
  font-size: 0.9rem;
  color: var(--sunset-peach);
}

.project-link {
  position: absolute;
  inset: 0;
  z-index: 10;
}

/* ═══════════════════════════════════════════════════
   CATEGORY CARDS
   ═══════════════════════════════════════════════════ */

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.category-card {
  position: relative;
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  background: white;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-sunset);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.category-card:hover::before {
  opacity: 0.1;
}

.category-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  display: block;
}

.category-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--deep-charcoal);
}

.category-count {
  font-size: 0.9rem;
  color: var(--warm-gray-600);
}

/* ═══════════════════════════════════════════════════
   FORMS
   ═══════════════════════════════════════════════════ */

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

.form-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--deep-charcoal);
}

[data-theme="dark"] .form-label {
  color: var(--warm-gray-200);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: 1rem;
  border: 2px solid var(--warm-gray-200);
  border-radius: var(--radius-md);
  background: white;
  color: var(--deep-charcoal);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--sunset-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */

.site-footer {
  background: var(--deep-charcoal);
  color: white;
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.footer-column h4 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--sunset-gold);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--space-sm);
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--sunset-orange);
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.newsletter-form input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.newsletter-form button {
  padding: var(--space-sm) var(--space-lg);
  background: var(--gradient-sunset);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.social-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: white;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--sunset-orange);
  transform: translateY(-3px);
}

.footer-bottom {
  max-width: 1200px;
  margin: var(--space-3xl) auto 0;
  padding: var(--space-xl) var(--space-xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════════════════
   FILTER BUTTONS
   ═══════════════════════════════════════════════════ */

.filter-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--warm-gray-600);
  background: transparent;
  border: 2px solid var(--warm-gray-200);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

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

/* ═══════════════════════════════════════════════════
   LOADING & ANIMATIONS
   ═══════════════════════════════════════════════════ */

.lazy {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.lazy.loaded {
  opacity: 1;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ═══════════════════════════════════════════════════
   DARK MODE TOGGLE
   ═══════════════════════════════════════════════════ */

.theme-toggle {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-sunset);
  color: white;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

.theme-toggle .sun-icon {
  display: none;
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE UTILITIES
   ═══════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--space-3xl) 0;
  }
  
  .footer-nav {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .social-links {
    justify-content: center;
  }
}

/* ═══════════════════════════════════════════════════
   UTILITY HELPERS
   ═══════════════════════════════════════════════════ */

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-2xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mt-5 { margin-top: var(--space-2xl); }

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

.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-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }
.gap-4 { gap: var(--space-xl); }