/* ========================================
   RESPONSIVE DESIGN ULTRA-OPTIMISÉ
   ======================================== */

/* ========================================
   VARIABLES RESPONSIVES
   ======================================== */
:root {
  --container-padding-mobile: 1rem;
  --container-padding-tablet: 2rem;
  --container-padding-desktop: 3rem;
  
  --font-size-mobile: 0.9rem;
  --font-size-tablet: 1rem;
  --font-size-desktop: 1.1rem;
  
  --spacing-mobile: 1rem;
  --spacing-tablet: 1.5rem;
  --spacing-desktop: 2rem;
}

/* ========================================
   CONTAINER RESPONSIF
   ======================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding-mobile);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--container-padding-tablet);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--container-padding-desktop);
  }
}

/* ========================================
   GRID SYSTEM RESPONSIF
   ======================================== */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -0.5rem;
}

.col-12 { width: 100%; }
.col-6 { width: 50%; }
.col-4 { width: 33.333%; }
.col-3 { width: 25%; }

@media (max-width: 768px) {
  .col-6,
  .col-4,
  .col-3 {
    width: 100%;
  }
}

/* ========================================
   HERO SECTION RESPONSIVE
   ======================================== */
.hero-section {
  min-height: 100vh;
  padding: 2rem 0;
}

.hero-content {
  padding: 1rem 0;
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-actions {
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-actions .btn {
  width: 100%;
  justify-content: center;
}

.hero-stats {
  justify-content: center;
  gap: 1.5rem;
}

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

.stat-number {
  font-size: 2rem;
}

.stat-label {
  font-size: 0.8rem;
}

.hero-image {
  text-align: center;
  margin-top: 2rem;
}

.profile-image {
  width: 250px;
  height: 250px;
}

.floating-icon {
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.4rem;
  }
  
  .hero-description {
    font-size: 1.1rem;
  }
  
  .hero-actions {
    flex-direction: row;
  }
  
  .hero-actions .btn {
    width: auto;
  }
  
  .hero-stats {
    justify-content: flex-start;
  }
  
  .profile-image {
    width: 300px;
    height: 300px;
  }
  
  .floating-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.5rem;
  }
  
  .hero-description {
    font-size: 1.2rem;
  }
  
  .hero-image {
    margin-top: 0;
  }
}

/* ========================================
   SECTIONS RESPONSIVES
   ======================================== */
.section-header {
  margin-bottom: 2rem;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1rem;
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: 3rem;
  }
  
  .section-title {
    font-size: 2.5rem;
  }
  
  .section-subtitle {
    font-size: 1.1rem;
  }
}

/* ========================================
   SKILLS SECTION RESPONSIVE
   ======================================== */
.skills-section {
  padding: 3rem 0;
}

.skill-card {
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.skill-icon {
  width: 50px;
  height: 50px;
  font-size: 1.2rem;
}

.skill-name {
  font-size: 1rem;
}

@media (min-width: 768px) {
  .skills-section {
    padding: 4rem 0;
  }
  
  .skill-card {
    padding: 2rem;
  }
  
  .skill-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
  
  .skill-name {
    font-size: 1.1rem;
  }
}

/* ========================================
   PORTFOLIO SECTION RESPONSIVE
   ======================================== */
.portfolio-section {
  padding: 3rem 0;
}

.portfolio-filters {
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.project-card {
  margin-bottom: 1rem;
}

.project-image {
  height: 200px;
}

.project-content {
  padding: 1rem;
}

.project-title {
  font-size: 1.1rem;
}

.project-description {
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .portfolio-section {
    padding: 4rem 0;
  }
  
  .portfolio-filters {
    gap: 1rem;
    margin-bottom: 3rem;
  }
  
  .filter-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
  
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  .project-content {
    padding: 1.5rem;
  }
  
  .project-title {
    font-size: 1.2rem;
  }
  
  .project-description {
    font-size: 1rem;
  }
}

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

/* ========================================
   BLOG SECTION RESPONSIVE
   ======================================== */
.blog-section {
  padding: 3rem 0;
}

.blog-card {
  margin-bottom: 1rem;
}

.blog-image {
  height: 180px;
}

.blog-content {
  padding: 1rem;
}

.blog-title {
  font-size: 1.1rem;
}

.blog-excerpt {
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .blog-section {
    padding: 4rem 0;
  }
  
  .blog-image {
    height: 200px;
  }
  
  .blog-content {
    padding: 1.5rem;
  }
  
  .blog-title {
    font-size: 1.2rem;
  }
  
  .blog-excerpt {
    font-size: 1rem;
  }
}

/* ========================================
   TESTIMONIALS SECTION RESPONSIVE
   ======================================== */
.testimonials-section {
  padding: 3rem 0;
}

.testimonials-slider {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.testimonial-item {
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.testimonial-text {
  font-size: 1rem;
}

.testimonial-author {
  flex-direction: column;
  text-align: center;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .testimonials-section {
    padding: 4rem 0;
  }
  
  .testimonials-slider {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  .testimonial-item {
    padding: 2rem;
  }
  
  .testimonial-text {
    font-size: 1.1rem;
  }
  
  .testimonial-author {
    flex-direction: row;
    text-align: left;
  }
}

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

/* ========================================
   CONTACT SECTION RESPONSIVE
   ======================================== */
.contact-section {
  padding: 3rem 0;
}

.contact-content {
  gap: 2rem;
}

.contact-info {
  margin-bottom: 2rem;
}

.contact-item {
  padding: 1rem;
  margin-bottom: 1rem;
}

.contact-form {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-control {
  padding: 0.75rem;
  font-size: 0.9rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .contact-section {
    padding: 4rem 0;
  }
  
  .contact-content {
    gap: 3rem;
  }
  
  .contact-info {
    margin-bottom: 0;
  }
  
  .contact-item {
    padding: 1.5rem;
  }
  
  .contact-form {
    padding: 2rem;
  }
  
  .form-control {
    padding: 1rem;
    font-size: 1rem;
  }
  
  .btn {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
}

/* ========================================
   NAVIGATION RESPONSIVE
   ======================================== */
.navbar {
  padding: 0.75rem 0;
}

.navbar .container {
  padding: 0 1rem;
}

.navbar-brand {
  gap: 0.5rem;
}

.brand-text {
  font-size: 1rem;
}

.navbar-menu {
  display: none;
}

.navbar-menu.active {
  display: block;
}

.navbar-nav {
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 0;
}

.nav-link {
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
}

.nav-link i {
  font-size: 0.8rem;
  width: 12px;
}

@media (min-width: 768px) {
  .navbar {
    padding: 1rem 0;
  }
  
  .navbar .container {
    padding: 0 2rem;
  }
  
  .brand-text {
    font-size: 1.25rem;
  }
  
  .navbar-menu {
    display: block;
  }
  
  .navbar-nav {
    flex-direction: row;
    gap: 1rem;
    padding: 0;
  }
  
  .nav-link {
    padding: 0.5rem 0.8rem;
    font-size: 0.8rem;
  }
  
  .nav-link i {
    font-size: 0.85rem;
    width: 14px;
  }
}

/* ========================================
   FOOTER RESPONSIVE
   ======================================== */
.footer {
  padding: 2rem 0;
  text-align: center;
}

.footer-content {
  flex-direction: column;
  gap: 1rem;
}

.footer-text {
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .footer {
    padding: 3rem 0;
  }
  
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-text {
    font-size: 1rem;
  }
}

/* ========================================
   UTILITAIRES RESPONSIVES
   ======================================== */
.text-center-mobile {
  text-align: center;
}

.text-left-mobile {
  text-align: left;
}

.hidden-mobile {
  display: none;
}

.visible-mobile {
  display: block;
}

@media (min-width: 768px) {
  .text-center-mobile {
    text-align: left;
  }
  
  .hidden-mobile {
    display: block;
  }
  
  .visible-mobile {
    display: none;
  }
}

/* ========================================
   ANIMATIONS RESPONSIVES
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
  .navbar,
  .hero-background,
  .floating-elements,
  .back-to-top {
    display: none !important;
  }
  
  .hero-section {
    min-height: auto;
    padding: 2rem 0;
  }
  
  .section-title {
    color: #000 !important;
  }
  
  .section-subtitle {
    color: #666 !important;
  }
  
  .card-bg {
    background: #fff !important;
    border: 1px solid #ddd !important;
  }
}