/* ============================================
   FLORENT KLIMACEK — SITE PRINCIPAL
   Styles partagés
   ============================================ */

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

/* Supprime le délai 300ms au tap sur mobile */
a, button, [role="button"], input, select, textarea {
  touch-action: manipulation;
}

:root {
  /* Couleurs principales */
  --bg-page: #e7e5e4;
  --bg-dark: #1c1917;
  --bg-card: #ffffff;
  --bg-card-hover: #fafaf9;
  --bg-concept: #fffbeb;

  /* Texte */
  --text-primary: #292524;
  --text-secondary: #57534e;
  --text-muted: #78716c;
  --text-light: #a8a29e;
  --text-inverse: #fafaf9;

  /* Accent */
  --accent: #d97706;
  --accent-light: #f59e0b;
  --accent-dark: #b45309;

  /* Bordures */
  --border: #d6d3d1;
  --border-light: #e7e5e4;
  --border-dark: #44403c;

  /* États */
  --green: #16a34a;
  --red: #dc2626;

  /* 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;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Cormorant Garamond", Georgia, serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
}

/* ============================================
   MODE SOMBRE
   ============================================ */

[data-theme="dark"] {
  --bg-page: #1c1917;
  --bg-dark: #0c0a09;
  --bg-card: #292524;
  --bg-card-hover: #44403c;
  --bg-concept: #422006;

  --text-primary: #fafaf9;
  --text-secondary: #d6d3d1;
  --text-muted: #a8a29e;
  --text-light: #78716c;
  --text-inverse: #292524;

  --border: #44403c;
  --border-light: #292524;
  --border-dark: #78716c;
}

/* Transition douce lors du changement de thème */
html {
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
}

p {
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--accent-dark);
}

/* ============================================
   LAYOUT
   ============================================ */

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

.container--narrow {
  max-width: 720px;
}

.container--wide {
  max-width: 1400px;
}

/* ============================================
   COMPONENTS — Navigation
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(231, 229, 228, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .site-header {
  background: rgba(28, 25, 23, 0.9);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  max-width: 1400px;
  margin: 0 auto;
}

.site-header__logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.site-header__logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.site-nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text-primary);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-page);
    border-bottom: 1px solid var(--border);
    padding: var(--space-lg);
    gap: var(--space-md);
    display: none;
  }

  .site-nav.open {
    display: flex;
  }
}

/* ============================================
   COMPONENTS — Hero
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-4xl) 0;
}

.hero--short {
  min-height: 60vh;
}

.hero__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

.hero__title span {
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 500px;
  margin-top: var(--space-lg);
  font-weight: 300;
}

.hero__line {
  width: 1px;
  height: 80px;
  background: linear-gradient(180deg, var(--accent), transparent);
  margin-top: var(--space-3xl);
}

/* Hero two-column layout */
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero__visual {
  display: flex;
  justify-content: center;
}

.hero__image {
  width: 100%;
  max-width: 420px;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    order: -1;
  }

  .hero__image {
    max-width: 280px;
  }
}

/* ============================================
   COMPONENTS — Cards
   ============================================ */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--accent-light);
  box-shadow: 0 4px 20px rgba(217, 119, 6, 0.1);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  background: var(--bg-concept);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--accent);
}

.card__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.card__desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.card__date {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: var(--space-lg);
}

.card__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.card__link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.card:hover .card__link::after {
  transform: translateX(4px);
}

/* Card featured */
.card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 768px) {
  .card--featured {
    grid-template-columns: 1fr;
  }
}

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

.card--featured .card__visual {
  background: var(--bg-dark);
  border-radius: 8px;
  padding: var(--space-xl);
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Card dark */
.card--dark {
  background: var(--bg-dark);
  border-color: var(--border-dark);
}

.card--dark .card__title,
.card--dark .card__desc {
  color: var(--text-inverse);
}

.card--dark .card__desc {
  color: var(--text-light);
}

.card--dark .card__icon {
  background: rgba(245, 158, 11, 0.15);
}

.card--featured .card__title {
  margin-top: var(--space-md);
  font-size: 1.75rem;
}

/* ============================================
   COMPONENTS — Sections
   ============================================ */

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

.section--dark {
  background: var(--bg-dark);
  color: var(--text-inverse);
}

.section--alt {
  background: #fafaf9;
}

[data-theme="dark"] .section--alt {
  background: #292524;
}

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

.section__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

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

.section--dark .section__title {
  color: var(--text-inverse);
}

.section--dark .section__label {
  color: var(--accent-light);
}

.section--dark .section__subtitle {
  color: var(--text-light);
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* ============================================
   COMPONENTS — Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn--primary:hover {
  background: var(--accent-dark);
  color: white;
}

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

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
  padding: var(--space-sm) 0;
}

.btn__badge {
  font-size: 0.75rem;
  opacity: 0.6;
  margin-left: var(--space-sm);
}

.section__actions {
  text-align: center;
  margin-top: var(--space-2xl);
}

.section__actions .btn + .btn {
  margin-left: var(--space-md);
}

.section--dark .btn--secondary {
  border-color: var(--border-dark);
  color: var(--text-light);
}

/* ============================================
   COMPONENTS — About intro (index.html)
   ============================================ */

.about-intro {
  text-align: left;
  max-width: 620px;
  margin: 0 auto;
}

.about-intro__bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: var(--space-2xl);
}

.about-intro__bio:first-child {
  font-size: 1.15rem;
  color: var(--text-primary);
}

.about-intro__quote {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  text-align: center;
  margin: var(--space-3xl) 0;
  padding: var(--space-xl) var(--space-2xl);
  position: relative;
}

.about-intro__quote::before,
.about-intro__quote::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--accent);
  opacity: 0.4;
  margin: 0 auto;
}

.about-intro__quote::before {
  margin-bottom: var(--space-lg);
}

.about-intro__quote::after {
  margin-top: var(--space-lg);
}

.about-intro__tags {
  display: flex;
  justify-content: flex-start;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-light);
}

.about-intro__location {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Axes de recherche (about.html) --- */

.about-list {
  list-style: none;
  margin: var(--space-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.about-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

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

/* --- Page À propos — hero, contenu, contact --- */

.about-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  padding: var(--space-4xl) 0 var(--space-2xl);
  margin-top: 60px;
}

.about-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-4xl);
}

.about-content p {
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-content h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 300;
  color: var(--text-primary);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
}

.about-content h2::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin-bottom: var(--space-md);
}

/* --- Composant contact-card (about.html + contact.html) --- */

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-xl);
  transition: all var(--transition-fast);
}

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

.about-content .contact-card {
  margin-top: var(--space-2xl);
}

.contact-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.contact-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.contact-card__subtitle {
  color: var(--text-muted);
  margin-bottom: 0;
}

.contact-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--bg-concept);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.contact-card__icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
}

.contact-card a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.contact-card a:hover {
  color: var(--accent-light);
}

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

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-concept);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Page Contact — hero, contenu, grid, social, note --- */

.contact-hero {
  min-height: 40vh;
  display: flex;
  align-items: center;
  padding: var(--space-4xl) 0 var(--space-2xl);
  margin-top: 60px;
}

.contact-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-4xl);
}

.contact-content p {
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  line-height: 1.8;
}

.contact-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-primary);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
}

.contact-content h2::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin-bottom: var(--space-md);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

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

.social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

.social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.note-box {
  background: var(--bg-concept);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: var(--space-lg);
  margin-top: var(--space-2xl);
}

.note-box p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.note-box strong {
  color: var(--text-primary);
}

.location {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  padding: var(--space-md);
  background: var(--bg-card);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.location svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent);
}

/* --- Page 404 --- */

.hero--404 {
  text-align: center;
}

.hero--404 .hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
}

.hero--404 .hero__subtitle {
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* ============================================
   COMPONENTS — Tags
   ============================================ */

.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 4px;
  background: var(--bg-concept);
  color: var(--accent-dark);
}

.tag--outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ============================================
   COMPONENTS — Footer
   ============================================ */

.site-footer {
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.site-footer__links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.site-footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

/* ============================================
   UTILITIES
   ============================================ */

.text-center {
  text-align: center;
}
.text-muted {
  color: var(--text-muted);
}
.text-accent {
  color: var(--accent);
}

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

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

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

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--bg-card);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-muted);
  transition: stroke var(--transition-fast);
}

.theme-toggle:hover svg {
  stroke: var(--accent);
}

/* Icône lune visible en mode clair */
.theme-toggle .icon-moon {
  display: block;
}
.theme-toggle .icon-sun {
  display: none;
}

/* Icône soleil visible en mode sombre */
[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}
[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}
/* ============================================
   FORMULA DISPLAY
   ============================================ */

.formula-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--font-mono);
  padding: var(--space-lg);
  background: var(
    --bg-concept
  ); /* Utilise le fond des icônes pour la cohérence */
  border-radius: 8px;
  margin-top: var(--space-md);
  color: var(--text-primary);
  border: 1px dashed var(--border); /* Effet "tableau noir" ou "brouillon de recherche" */
}

.formula-result {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
}

.formula-operator {
  opacity: 0.5;
  font-size: 1.2rem;
}

.formula-fraction {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.formula-top {
  padding: 0 8px;
  font-size: 1rem;
}

.formula-bottom {
  padding: 0 8px;
  border-top: 1.5px solid var(--text-primary); /* La barre de fraction */
  font-size: 1rem;
}

/* Adaptation pour le mode sombre automatique */
[data-theme="dark"] .formula-display {
  background: rgba(245, 158, 11, 0.05);
  border-color: rgba(245, 158, 11, 0.2);
}
/* --- Tooltips pour la formule --- */

.formula-var {
  position: relative;
  cursor: help;
  padding: 0 4px;
  transition: color var(--transition-fast);
}

.formula-var:hover {
  color: var(--accent);
}

/* La bulle d'info */
.formula-var::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-dark);
  color: #fff;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  pointer-events: none;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* La petite flèche de la bulle */
.formula-var::before {
  content: "";
  position: absolute;
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bg-dark);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.formula-var:hover::after,
.formula-var:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Correction pour les variables en bas de fraction */
.formula-bottom .formula-var::after {
  bottom: auto;
  top: 125%;
}
.formula-bottom .formula-var::before {
  bottom: auto;
  top: 110%;
  border-top-color: transparent;
  border-bottom-color: var(--bg-dark);
}
/* --- Bloc Visuel Vedette --- */
.featured-visual {
  background: radial-gradient(
    circle at top right,
    #292524,
    #0c0a09
  ); /* Dégradé profond */
  border: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  padding: var(--space-2xl) !important;
  position: relative;
  overflow: hidden;
}

/* Petit effet de lignes de fond (Optionnel mais stylé) */
.featured-visual::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(
    rgba(245, 158, 11, 0.03) 1px,
    transparent 1px
  );
  background-size: 100% 40px;
  pointer-events: none;
}

.featured-quote {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  line-height: 1.3;
  color: #e7e5e4;
  margin: 0;
  z-index: 1;
}

.featured-quote span {
  color: var(--accent); /* Ton orange pour souligner la chute de la phrase */
  display: block;
  margin-top: 0.5rem;
}

.featured-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  z-index: 1;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--accent-light);
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================
   RESPONSIVE — Small phones (< 480px)
   ============================================ */

@media (max-width: 480px) {
  /* Reduce global spacing */
  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: var(--space-2xl) 0;
  }

  .hero--short {
    min-height: auto;
  }

  .hero__subtitle {
    font-size: 1.05rem;
  }

  .hero__image {
    max-width: 220px;
  }

  /* Cards — allow narrower columns */
  .card-grid {
    grid-template-columns: 1fr;
  }

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

  /* Sections */
  .section {
    padding: var(--space-2xl) 0;
  }

  .section__title {
    font-size: 1.75rem;
  }

  /* Buttons side by side → stack */
  .section__actions .btn + .btn {
    margin-left: 0;
    margin-top: var(--space-sm);
  }

  .section__actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }

  /* Footer links wrap */
  .site-footer__links {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  /* Featured visual */
  .featured-quote {
    font-size: 1.3rem;
  }

  .featured-stats {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* Formula */
  .formula-display {
    flex-wrap: wrap;
    font-size: 0.85rem;
    gap: 6px;
  }

  .formula-result {
    font-size: 1.2rem;
  }

  /* Formula tooltips — empêcher le débordement */
  .formula-var::after {
    white-space: normal;
    max-width: 200px;
    text-align: center;
  }

  /* Stats */
  .stat-value {
    font-size: 1.1rem;
  }

  /* About intro */
  .about-intro__quote {
    font-size: 1.25rem;
    padding: var(--space-lg) var(--space-md);
    margin: var(--space-2xl) 0;
  }

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