/* ==========================================================================
   AS EASY PORTFOLIO - STYLES
   Architecture: Atomic Design (Atoms → Molecules → Organisms)
   Author: AS Easy
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. CSS VARIABLES (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary: #4F46E5;
  --color-primary-dark: #4338CA;
  --color-primary-light: #818CF8;
  --color-secondary: #10B981;
  --color-secondary-dark: #059669;
  --color-accent: #F59E0B;
  --color-dark: #1F2937;
  --color-dark-lighter: #374151;
  --color-gray: #6B7280;
  --color-gray-light: #9CA3AF;
  --color-light: #F9FAFB;
  --color-white: #FFFFFF;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-dark: linear-gradient(180deg, rgba(31, 41, 55, 0.95) 0%, rgba(17, 24, 39, 0.98) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 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);
  --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* --------------------------------------------------------------------------
   1. RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-light);
  overflow-x: hidden;
}

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

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

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

/* --------------------------------------------------------------------------
   2. ATOMS - Éléments de base
   -------------------------------------------------------------------------- */

/* Typography */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.heading-xl {
  font-size: clamp(2.5rem, 5vw, var(--font-size-6xl));
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.heading-lg {
  font-size: clamp(1.875rem, 4vw, var(--font-size-4xl));
  font-weight: 700;
  line-height: 1.2;
}

.heading-md {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  line-height: 1.3;
}

.heading-sm {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: 1.4;
}

.text-lg {
  font-size: var(--font-size-lg);
  line-height: 1.7;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(4px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* Tags/Badges */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--color-light);
  color: var(--color-dark);
  transition: all var(--transition-fast);
}

.tag-primary {
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-primary);
}

.tag-secondary {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-secondary);
}

/* Icons */
.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon-lg {
  width: 32px;
  height: 32px;
}

.icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-primary);
  transition: all var(--transition-base);
}

.icon-container:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.1) rotate(5deg);
}

/* Divider */
.divider {
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  margin: var(--spacing-md) auto;
}

/* --------------------------------------------------------------------------
   3. MOLECULES - Composants composés
   -------------------------------------------------------------------------- */

/* Card Base */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.card:hover::before {
  transform: scaleX(1);
}

/* Service Card */
.service-card {
  text-align: center;
}

.service-card .icon-container {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
}

.service-card:hover .icon-container {
  background: var(--color-primary);
  color: var(--color-white);
}

.service-card h3 {
  margin-bottom: var(--spacing-md);
}

.service-card p {
  color: var(--color-gray);
  margin-bottom: var(--spacing-lg);
}

.service-card ul {
  list-style: none;
  text-align: left;
}

.service-card li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  color: var(--color-gray);
  margin-bottom: var(--spacing-sm);
}

.service-card li svg {
  color: var(--color-secondary);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Project Card */
.project-card {
  padding: 0;
  overflow: hidden;
}

.project-card__image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-lg);
  transition: transform var(--transition-slow);
}

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

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-card__content {
  padding: var(--spacing-xl);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-top: var(--spacing-md);
}

.project-card__link svg {
  transition: transform var(--transition-fast);
}

.project-card__link:hover svg {
  transform: translateX(4px);
}

/* Testimonial Card */
.testimonial-card {
  position: relative;
}

.testimonial-card__quote {
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.1;
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  line-height: 1;
}

.testimonial-card__content {
  position: relative;
  z-index: 1;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.testimonial-card__avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-primary);
}

.testimonial-card__stars {
  display: flex;
  gap: 2px;
  color: var(--color-accent);
  margin-top: var(--spacing-md);
}

/* Skill Badge */
.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.skill-badge:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.skill-badge__icon {
  width: 32px;
  height: 32px;
}

.skill-badge__name {
  font-weight: 500;
  color: var(--color-dark);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-3xl);
}

.section-header__subtitle {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
}

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

.section-header__description {
  color: var(--color-gray);
  font-size: var(--font-size-lg);
}

/* --------------------------------------------------------------------------
   4. ORGANISMS - Sections complètes
   -------------------------------------------------------------------------- */

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header/Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.header__link {
  font-weight: 500;
  color: var(--color-gray);
  position: relative;
  padding: var(--spacing-sm) 0;
}

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

.header__link:hover,
.header__link--active {
  color: var(--color-primary);
}

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

.header__cta {
  margin-left: var(--spacing-lg);
}

.header__mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.header__mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: all var(--transition-fast);
}

.header__mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

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

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-white);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-nav.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav__link {
  display: block;
  padding: var(--spacing-md);
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-light);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
  background: var(--color-light);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-4xl) 0;
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__slider-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 1s ease-in-out;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-dark);
  z-index: -1;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xl);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-secondary);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

.hero__title {
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
}

.hero__title-highlight {
  display: inline-block;
  position: relative;
}

.hero__title-highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 12px;
  background: var(--color-primary);
  opacity: 0.3;
  z-index: -1;
  transform: skewX(-3deg);
}

.hero__description {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
}

.hero__stats {
  display: flex;
  gap: var(--spacing-3xl);
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-white);
}

.hero__stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
  animation: bounce 2s infinite;
}

.hero__scroll-indicator svg {
  width: 24px;
  height: 24px;
}

/* Section Base */
.section {
  padding: var(--spacing-4xl) 0;
}

.section--gray {
  background: var(--color-light);
}

.section--dark {
  background: var(--color-dark);
  color: var(--color-white);
}

.section--dark .section-header__description {
  color: rgba(255, 255, 255, 0.7);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

/* Testimonials Grid */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about__image-wrapper {
  position: relative;
}

.about__image {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

.about__image-decoration {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-xl);
  z-index: -1;
}

.about__content h2 {
  margin-bottom: var(--spacing-lg);
}

.about__content p {
  color: var(--color-gray);
  margin-bottom: var(--spacing-lg);
}

.about__values {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact__info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact__info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.contact__form {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

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

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-light);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

/* Footer */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer__brand p {
  color: var(--color-gray-light);
  margin-top: var(--spacing-md);
  max-width: 300px;
}

.footer__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.footer__links {
  list-style: none;
}

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

.footer__links a {
  color: var(--color-gray-light);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
  color: var(--color-gray-light);
  font-size: var(--font-size-sm);
}

.footer__socials {
  display: flex;
  gap: var(--spacing-md);
}

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

.footer__social-link:hover {
  background: var(--color-primary);
  transform: translateY(-3px);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* --------------------------------------------------------------------------
   5. ANIMATIONS
   -------------------------------------------------------------------------- */

/* Keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.5);
  }
}

@keyframes pulse-btn {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4);
  }
  50% {
    box-shadow: 0 0 0 15px rgba(79, 70, 229, 0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.animate-on-scroll[data-animation="fade-left"] {
  transform: translateX(-30px);
}

.animate-on-scroll[data-animation="fade-left"].visible {
  transform: translateX(0);
}

.animate-on-scroll[data-animation="fade-right"] {
  transform: translateX(30px);
}

.animate-on-scroll[data-animation="fade-right"].visible {
  transform: translateX(0);
}

.animate-on-scroll[data-animation="scale"] {
  transform: scale(0.9);
}

.animate-on-scroll[data-animation="scale"].visible {
  transform: scale(1);
}

/* Staggered animations */
.animate-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.animate-stagger.visible > *:nth-child(1) { transition-delay: 0.1s; }
.animate-stagger.visible > *:nth-child(2) { transition-delay: 0.2s; }
.animate-stagger.visible > *:nth-child(3) { transition-delay: 0.3s; }
.animate-stagger.visible > *:nth-child(4) { transition-delay: 0.4s; }
.animate-stagger.visible > *:nth-child(5) { transition-delay: 0.5s; }
.animate-stagger.visible > *:nth-child(6) { transition-delay: 0.6s; }

.animate-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Hover Animations */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.hover-scale {
  transition: transform var(--transition-base);
}

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

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

/* CTA Pulse Animation */
.btn-pulse {
  animation: pulse-btn 2s infinite;
}

.btn-pulse:hover {
  animation: none;
}

/* Float Animation */
.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   6. UTILITIES
   -------------------------------------------------------------------------- */

/* Accessibility */
.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;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-md);
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Text */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Spacing */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mb-2 { margin-bottom: var(--spacing-xl); }

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

/* Flex utilities */
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--spacing-md); }
.gap-2 { gap: var(--spacing-xl); }

/* --------------------------------------------------------------------------
   7. RESPONSIVE
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .about__image-decoration {
    display: none;
  }

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

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 4rem;
  }

  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .header__mobile-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: calc(72px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  }

  .hero__content {
    text-align: center;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
    gap: var(--spacing-xl);
  }

  .hero__scroll-indicator {
    display: none;
  }

  .services-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__brand {
    text-align: center;
  }

  .footer__brand p {
    margin: var(--spacing-md) auto 0;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

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

/* --------------------------------------------------------------------------
   8. PRINT STYLES
   -------------------------------------------------------------------------- */

@media print {
  .header,
  .footer,
  .back-to-top,
  .hero__scroll-indicator {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-xl) 0;
  }

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

  .card {
    box-shadow: none;
    border: 1px solid var(--color-gray-light);
  }
}