/* ===========================================
   STYLES GLOBAUX - Tony Costa Nunes
   Dark Mode Premium Design
   =========================================== */

@import url('variables.css');

/* Google Fonts - Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-text-primary);
}

ul, ol {
  list-style: none;
}

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

/* ===========================================
   TYPOGRAPHY
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-5xl);
  font-weight: 800;
}

h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-6);
}

h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-4);
}

h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-3);
}

p {
  margin-bottom: var(--spacing-4);
}

strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

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

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

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--spacing-20) 0;
  position: relative;
}

.section--surface {
  background-color: var(--color-bg-surface);
}

.section--elevated {
  background-color: var(--color-bg-elevated);
}

/* ===========================================
   HEADER & NAVIGATION
   =========================================== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

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

.header__logo {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

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

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

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* Dropdown Menu */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  padding: var(--spacing-3);
  margin-top: var(--spacing-4);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
  transform: translateX(-50%) translateY(8px);
  z-index: 100;
}

.nav__dropdown-menu::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
}

.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown.open .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown-menu a {
  display: block;
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav__dropdown-menu a:hover {
  color: var(--color-primary-light);
  background-color: rgba(102, 126, 234, 0.1);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-3) var(--spacing-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-dark);
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-glow);
}

.nav__cta:hover {
  color: var(--color-text-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-lg);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-2);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: var(--transition-fast);
}

/* ===========================================
   HERO SECTION
   =========================================== */
.hero {
  padding: var(--spacing-24) 0 var(--spacing-32);
  position: relative;
  overflow: hidden;
}

/* Particules en fond */
.hero::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 400px;
  background: radial-gradient(ellipse at center bottom, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 20%;
  right: 10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero__container {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero__photo {
  margin-bottom: var(--spacing-6);
}

.hero__photo img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto;
  border: 3px solid var(--color-border-accent);
  box-shadow: 0 0 30px rgba(102, 126, 234, 0.3);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  margin-bottom: var(--spacing-6);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary-light);
  background-color: rgba(102, 126, 234, 0.1);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-full);
}

.hero__title {
  font-size: var(--text-6xl);
  font-weight: 800;
  margin-bottom: var(--spacing-6);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

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

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-10);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--leading-relaxed);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-16);
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-16);
  padding-top: var(--spacing-10);
  border-top: 1px solid var(--color-border);
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  display: block;
  font-size: var(--text-4xl);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===========================================
   BUTTONS
   =========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-6);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.btn--primary {
  color: var(--color-text-dark);
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  color: var(--color-text-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-lg);
}

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

.btn--secondary:hover {
  color: var(--color-text-primary);
  border-color: var(--color-primary);
  background-color: rgba(102, 126, 234, 0.1);
}

.btn--large {
  padding: var(--spacing-5) var(--spacing-10);
  font-size: var(--text-lg);
}

/* ===========================================
   CLIENTS LOGOS
   =========================================== */
.clients {
  padding: var(--spacing-12) 0;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.clients__title {
  text-align: center;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-8);
}

.clients__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-12);
}

.clients__logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.clients__logo:hover {
  color: var(--color-text-secondary);
}

/* ===========================================
   SERVICES SECTION
   =========================================== */
.services__header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.services__header p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.services__toggle {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-10);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--spacing-1);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.services__tab {
  padding: var(--spacing-2) var(--spacing-8);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-primary);
}

.services__tab:hover {
  color: var(--color-text-secondary);
}

.services__tab--active {
  color: var(--color-text-dark);
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

.service-card {
  padding: var(--spacing-8);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-smooth);
}

.service-card:hover {
  border-color: var(--color-border-accent);
  background-color: var(--color-bg-elevated);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--spacing-6);
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-lg);
  font-size: var(--text-2xl);
}

.service-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-3);
}

.service-card__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-4);
}

.service-card__price {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: var(--spacing-4);
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-primary-light);
}

.service-card__link:hover {
  color: var(--color-text-primary);
}

/* ===========================================
   RESULTS SECTION
   =========================================== */
.results__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

.result-card {
  padding: var(--spacing-8);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
}

.result-card:hover {
  border-color: var(--color-border-accent);
}

.result-card__client {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-3);
}

.result-card__metric {
  display: block;
  font-size: var(--text-5xl);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-2);
}

.result-card__label {
  color: var(--color-text-secondary);
  margin: 0;
}

/* ===========================================
   CTA SECTION
   =========================================== */
.cta-section {
  padding: var(--spacing-24) 0;
  background: var(--color-bg-surface);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  position: relative;
  margin-bottom: var(--spacing-4);
}

.cta-section__description {
  position: relative;
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===========================================
   FAQ SECTION
   =========================================== */
.faq__list {
  max-width: 800px;
  margin: 0 auto;
}

.faq {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.faq__item {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq__item[open] {
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-glow);
}

.faq__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--spacing-5) var(--spacing-6);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: left;
  cursor: pointer;
  list-style: none;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::after {
  content: '+';
  font-size: var(--text-xl);
  color: var(--color-primary-light);
  transition: transform var(--transition-fast);
}

.faq__item[open] .faq__question::after {
  content: '−';
}

.faq__answer {
  padding: 0 var(--spacing-6) var(--spacing-5);
}

.faq__answer p {
  margin: 0;
  color: var(--color-text-secondary);
}

.faq__answer ul {
  margin-top: var(--spacing-3);
  padding-left: var(--spacing-5);
}

.faq__answer li {
  margin-bottom: var(--spacing-2);
  color: var(--color-text-secondary);
}

/* ===========================================
   FOOTER
   =========================================== */
.footer {
  padding: var(--spacing-16) 0 var(--spacing-8);
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

.footer__brand {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-4);
}

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

.footer__description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-6);
}

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

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.footer__social a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  box-shadow: var(--shadow-glow);
}

.footer__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-6);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__legal {
  display: flex;
  gap: var(--spacing-6);
}

/* ===========================================
   PAGE CONTENT
   =========================================== */
.page-header {
  padding: var(--spacing-16) 0;
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center top, rgba(102, 126, 234, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.page-header__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-4);
  position: relative;
}

.page-header__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.page-content {
  padding: var(--spacing-12) 0;
}

.page-content h2 {
  margin-top: var(--spacing-12);
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-border);
}

.page-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-content h3 {
  margin-top: var(--spacing-8);
}

.page-content ul,
.page-content ol {
  margin-bottom: var(--spacing-6);
  padding-left: var(--spacing-6);
}

.page-content ul {
  list-style: disc;
}

.page-content ol {
  list-style: decimal;
}

.page-content li {
  margin-bottom: var(--spacing-2);
  color: var(--color-text-secondary);
}

.page-content blockquote {
  margin: var(--spacing-8) 0;
  padding: var(--spacing-6);
  background-color: var(--color-bg-surface);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
}

.page-content blockquote p {
  margin-bottom: 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* ===========================================
   FORM ELEMENTS
   =========================================== */
.form-group {
  margin-bottom: var(--spacing-6);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

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

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-4) center;
  background-size: 16px;
}

/* ===========================================
   BREADCRUMBS
   =========================================== */
.breadcrumbs {
  padding: var(--spacing-4) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

.breadcrumbs__item::after {
  content: '/';
  margin-left: var(--spacing-2);
  color: var(--color-text-muted);
}

.breadcrumbs__item:last-child::after {
  display: none;
}

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

.breadcrumbs__link:hover {
  color: var(--color-primary-light);
}

.breadcrumbs__current {
  color: var(--color-text-secondary);
}

/* ===========================================
   ZONES SECTION
   =========================================== */
.zones__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-4);
}

.zones__link {
  display: block;
  padding: var(--spacing-4) var(--spacing-5);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 500;
  text-align: center;
  transition: all var(--transition-fast);
}

.zones__link:hover {
  border-color: var(--color-border-accent);
  color: var(--color-primary-light);
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-glow);
}

/* ===========================================
   CONTACT PAGE
   =========================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-12);
  align-items: start;
}

.contact-form-wrapper h2 {
  margin-bottom: var(--spacing-4);
}

.contact-form-wrapper > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-8);
}

.contact-form {
  background-color: var(--color-bg-surface);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.form-group--checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
}

.form-group--checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-group--checkbox label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.form-group--checkbox label a {
  color: var(--color-primary-light);
}

.btn--full {
  width: 100%;
}

/* Contact Info Sidebar */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.contact-card {
  padding: var(--spacing-8);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.contact-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-1);
}

.contact-card__role {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 500;
  margin-bottom: var(--spacing-6);
}

.contact-card__details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--color-border);
}

.contact-card__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  color: var(--color-text-secondary);
}

.contact-card__item svg {
  flex-shrink: 0;
  color: var(--color-primary-light);
}

.contact-card__item small {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.contact-card__social {
  display: flex;
  gap: var(--spacing-3);
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.social-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
}

.social-link svg {
  width: 18px;
  height: 18px;
}

/* Quick Info Box */
.contact-quick-info {
  padding: var(--spacing-6);
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-xl);
}

.contact-quick-info h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-4);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.check-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.check-list svg {
  flex-shrink: 0;
  color: var(--color-primary-light);
}

/* Response Time Box */
.contact-response {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-6);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-xl);
}

.contact-response__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--gradient-glow);
  border-radius: var(--radius-full);
  color: var(--color-primary-light);
  flex-shrink: 0;
}

.contact-response__text strong {
  display: block;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-1);
}

.contact-response__text p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===========================================
   TL;DR BOX
   =========================================== */
.tldr {
  margin-bottom: var(--spacing-10);
  padding: var(--spacing-6);
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.tldr__title {
  font-size: var(--text-lg);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-4);
  padding: 0;
  border: none;
  margin-top: 0;
}

.tldr__list {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0 !important;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.tldr__list li {
  position: relative;
  padding-left: var(--spacing-6);
  margin: 0;
  color: var(--color-text-secondary);
}

.tldr__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
  font-weight: 600;
}

.tldr__list li strong {
  color: var(--color-text-primary);
}

/* ===========================================
   SECTION TITLE
   =========================================== */
.section__title {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.section--alt {
  background-color: var(--color-bg-surface);
}

/* Cities Grid */
.cities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-4);
}

.city-link {
  display: block;
  padding: var(--spacing-4) var(--spacing-5);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 500;
  text-align: center;
  transition: all var(--transition-fast);
}

.city-link:hover {
  border-color: var(--color-border-accent);
  color: var(--color-primary-light);
  background-color: var(--color-bg-elevated);
}

/* ===========================================
   COMPARISON CARDS
   =========================================== */
.comparison-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin: var(--spacing-8) 0;
}

.comparison-card {
  padding: var(--spacing-6);
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
}

.comparison-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.comparison-card--featured {
  border-left: 4px solid var(--color-primary);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(37, 99, 235, 0.01) 100%);
}

.comparison-card__header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--color-border);
}

.comparison-card__name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.comparison-card__name .emoji {
  font-size: var(--text-2xl);
}

.comparison-card__location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.comparison-card__details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.comparison-card__detail {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.comparison-card__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 600;
}

.comparison-card__value {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.comparison-card__price {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-light);
}

.comparison-card__strengths {
  margin-top: var(--spacing-2);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-border);
}

.comparison-card__strengths-title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.comparison-card__strengths-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.comparison-card__strengths-list li {
  position: relative;
  padding-left: var(--spacing-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.comparison-card__strengths-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.comparison-badge {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  background: var(--color-primary);
  color: var(--color-text-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-2);
}

/* ===========================================
   SEO QUIZ - Lead Generation
   =========================================== */
.seo-quiz {
  margin: var(--spacing-10) 0;
  padding: var(--spacing-8);
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.seo-quiz__header {
  margin-bottom: var(--spacing-6);
}

.seo-quiz__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-2);
  padding: 0;
  border: none;
  margin-top: 0;
}

.seo-quiz__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin: 0;
}

.seo-quiz__step-indicator {
  margin-bottom: var(--spacing-6);
}

.seo-quiz__step {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-2);
  font-weight: 500;
}

.seo-quiz__progress {
  width: 100%;
  height: 4px;
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.seo-quiz__progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-smooth);
}

.seo-quiz__step-content {
  min-height: 180px;
}

.seo-quiz__question {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-6);
  padding: 0;
  border: none;
}

.seo-quiz__options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-3);
}

.seo-quiz__option {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4) var(--spacing-5);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  min-height: 56px;
}

.seo-quiz__option:hover {
  border-color: var(--color-border-accent);
  color: var(--color-primary-light);
  background-color: var(--color-bg-hover);
}

.seo-quiz__option--selected {
  border-color: var(--color-primary);
  background-color: rgba(102, 126, 234, 0.1);
  color: var(--color-primary-light);
  box-shadow: var(--shadow-glow);
}

.seo-quiz__form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
}

.seo-quiz__form .form-group:nth-child(n+5) {
  grid-column: 1 / -1;
}

.seo-quiz__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-6);
  gap: var(--spacing-4);
}

.seo-quiz__back {
  padding: var(--spacing-3) var(--spacing-6);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.seo-quiz__back:hover {
  border-color: var(--color-border-accent);
  color: var(--color-text-primary);
}

.seo-quiz__next {
  padding: var(--spacing-3) var(--spacing-8);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: auto;
  box-shadow: var(--shadow-glow);
}

.seo-quiz__next:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-lg);
}

.seo-quiz__next:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.seo-quiz__success {
  text-align: center;
  padding: var(--spacing-8) var(--spacing-4);
}

.seo-quiz__success-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-4);
  display: block;
}

.seo-quiz__success p {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

.seo-quiz__success p strong {
  color: var(--color-success);
  font-size: var(--text-2xl);
  display: block;
  margin-bottom: var(--spacing-2);
}

.seo-quiz__error {
  color: var(--color-error);
  font-size: var(--text-sm);
  margin-top: var(--spacing-2);
}

/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .comparison-cards {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-10);
  }
}

@media (max-width: 768px) {
  :root {
    --text-6xl: 2.75rem;
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
  }

  .seo-quiz {
    padding: var(--spacing-6);
  }

  .seo-quiz__options {
    grid-template-columns: 1fr;
  }

  .seo-quiz__form {
    grid-template-columns: 1fr;
  }

  .nav__list {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav.active .nav__list {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    padding: var(--spacing-6);
    background-color: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  .nav__dropdown-menu {
    position: static;
    transform: none;
    margin-top: 0;
    padding: 0 0 0 var(--spacing-4);
    background: none;
    border: none;
    box-shadow: none;
    border-radius: 0;
    border-left: 2px solid var(--color-border-accent);
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: max-height 0.3s;
  }

  .nav__dropdown-menu::before {
    display: none;
  }

  .nav__dropdown.open .nav__dropdown-menu {
    max-height: 300px;
    transform: none;
    margin-top: var(--spacing-2);
  }

  .nav__dropdown:hover .nav__dropdown-menu {
    max-height: 0;
    transform: none;
  }

  .nav__dropdown:hover.open .nav__dropdown-menu {
    max-height: 300px;
  }

  .hero {
    padding: var(--spacing-16) 0 var(--spacing-20);
  }

  .hero__stats {
    flex-direction: column;
    gap: var(--spacing-8);
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__cta .btn {
    width: 100%;
  }

  .section {
    padding: var(--spacing-12) 0;
  }

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

  .footer__social {
    justify-content: center;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }

  .footer__legal {
    flex-wrap: wrap;
    justify-content: center;
  }

  .contact-form {
    padding: var(--spacing-6);
  }

  .contact-card__social {
    flex-direction: column;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-4);
  }

  .clients__logos {
    gap: var(--spacing-6);
  }

  .clients__logo {
    font-size: var(--text-base);
  }

  .hero__title {
    font-size: var(--text-4xl);
  }
}

/* ===========================================
   PARTICLES ANIMATION (optional JS enhancement)
   =========================================== */
.particles-container {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 300px;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--color-primary-light);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 8s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 0.6;
  }
  50% {
    transform: translateY(-100px) translateX(20px);
    opacity: 0.2;
  }
}

/* Glow pulse animation for accents */
@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(102, 126, 234, 0.5);
  }
}

.glow-pulse {
  animation: glow-pulse 3s ease-in-out infinite;
}

/* ===========================================
   BLOG STYLES
   =========================================== */

/* Blog Filters */
.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  justify-content: center;
  margin-bottom: var(--spacing-8);
}

.blog-filter {
  padding: var(--spacing-3) var(--spacing-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.blog-filter:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-secondary);
}

.blog-filter--active {
  color: var(--color-text-dark);
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* Blog Tags */
.blog-tag {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.blog-tag--seo {
  color: #34d399;
  background-color: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.blog-tag--geo {
  color: #a78bfa;
  background-color: rgba(167, 139, 250, 0.1);
  border: 1px solid rgba(167, 139, 250, 0.3);
}

.blog-tag--guide {
  color: #60a5fa;
  background-color: rgba(96, 165, 250, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.3);
}

.blog-tag--actualite {
  color: #f472b6;
  background-color: rgba(244, 114, 182, 0.1);
  border: 1px solid rgba(244, 114, 182, 0.3);
}

/* Featured Article */
.blog-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-10);
  align-items: center;
  padding: var(--spacing-10);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.blog-featured__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.blog-featured__meta time {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.blog-featured__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-4);
}

.blog-featured__title a {
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.blog-featured__title a:hover {
  color: var(--color-primary-light);
}

.blog-featured__excerpt {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: var(--leading-relaxed);
}

.blog-featured__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.blog-featured__placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-glow);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-xl);
  font-size: var(--text-5xl);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

/* Blog Card */
.blog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.blog-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.blog-card__image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  font-weight: 800;
  background: var(--gradient-glow);
}

.blog-card__placeholder--seo {
  color: #34d399;
}

.blog-card__placeholder--geo {
  color: #a78bfa;
}

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

.blog-card__content {
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.blog-card__meta time {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-left: auto;
}

.blog-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-3);
  line-height: var(--leading-tight);
}

.blog-card__title a {
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.blog-card__title a:hover {
  color: var(--color-primary-light);
}

.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
}

.blog-card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-light);
  transition: color var(--transition-fast);
}

.blog-card__link:hover {
  color: var(--color-text-primary);
}

/* ===========================================
   ARTICLE STYLES
   =========================================== */
.article {
  max-width: 1100px;
  margin: 0 auto;
}

.article-header {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.article-header__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-6);
}

.article-header__meta time {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article-header__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-6);
  line-height: var(--leading-tight);
}

.article-header__excerpt {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Article Content */
.article-content {
  font-size: var(--text-lg);
  line-height: 1.8;
}

.article-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--spacing-12);
  margin-bottom: var(--spacing-6);
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-border);
}

.article-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.article-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-4);
}

.article-content p {
  margin-bottom: var(--spacing-6);
  color: var(--color-text-secondary);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-6);
  padding-left: var(--spacing-6);
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: var(--spacing-3);
  color: var(--color-text-secondary);
}

.article-content strong {
  color: var(--color-text-primary);
}

.article-content a {
  color: var(--color-primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--color-text-primary);
}

.article-content blockquote {
  margin: var(--spacing-8) 0;
  padding: var(--spacing-6) var(--spacing-8);
  background: var(--gradient-glow);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.article-content blockquote p {
  margin: 0;
  font-style: italic;
  font-size: var(--text-xl);
  color: var(--color-text-primary);
}

/* Article Info Box */
.article-info-box {
  margin: var(--spacing-8) 0;
  padding: var(--spacing-6);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-xl);
}

.article-info-box h4 {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
  color: var(--color-primary-light);
}

.article-info-box p {
  margin: 0;
}

/* Article Author */
.article-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  margin-top: var(--spacing-12);
  padding: var(--spacing-8);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.article-author__avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-dark);
  flex-shrink: 0;
}

.article-author__info h4 {
  margin-bottom: var(--spacing-1);
}

.article-author__info p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-2);
  font-size: var(--text-sm);
}

.article-author__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-light);
}

/* Related Articles */
.related-articles {
  margin-top: var(--spacing-16);
  padding-top: var(--spacing-12);
  border-top: 1px solid var(--color-border);
}

.related-articles h2 {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.related-articles__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

/* Article Body - Two Column Layout with Sticky TOC */
.article__body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: var(--spacing-10);
  align-items: start;
}

.article__sidebar {
  position: sticky;
  top: 100px;
  order: 2;
}

.article__body > .article-content {
  order: 1;
}

/* Table of Contents */
.article-toc {
  padding: var(--spacing-5);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.article-toc h4 {
  margin-bottom: var(--spacing-4);
  font-size: var(--text-base);
}

.article-toc ul {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0 !important;
}

.article-toc li {
  margin-bottom: var(--spacing-1) !important;
}

.article-toc a {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.article-toc a:hover,
.article-toc a.active {
  color: var(--color-primary-light);
  background-color: rgba(102, 126, 234, 0.1);
}

.article-toc a::before {
  content: '→';
  color: var(--color-primary-light);
  flex-shrink: 0;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* Reading Progress Bar (blog articles) */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 10000;
  transition: width 0.1s linear;
}

/* Blog Responsive */
@media (max-width: 1024px) {
  .article__body {
    grid-template-columns: 1fr;
  }

  .article__sidebar {
    position: static;
    order: -1;
  }

  .article {
    max-width: 800px;
  }
}

@media (max-width: 768px) {
  .blog-featured {
    grid-template-columns: 1fr;
    padding: var(--spacing-6);
  }

  .blog-featured__image {
    order: -1;
  }

  .blog-featured__title {
    font-size: var(--text-2xl);
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .article-header__title {
    font-size: var(--text-3xl);
  }

  .article-author {
    flex-direction: column;
    text-align: center;
  }
}