/* ========================================
   PRISME — Premium Design System
   ======================================== */

/* ========================================
   1. CSS VARIABLES & DESIGN TOKENS
   ======================================== */

:root {
  /* Colors — PRISME Palette */
  --color-background: #FAFAFA;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #666666;
  --color-text-light: #FFFFFF;

  /* PRISME Gradients */
  --gradient-rose: linear-gradient(135deg, #FFE5F0 0%, #FFB6D9 100%);
  --gradient-violet: linear-gradient(135deg, #E5BCFF 0%, #9D7BE8 100%);
  --gradient-blue: linear-gradient(135deg, #A5C9FF 0%, #6B9FE8 100%);
  --gradient-prism: linear-gradient(135deg, #FFE5F0 0%, #E5BCFF 33%, #A5C9FF 66%, #6B9FE8 100%);
  --gradient-prism-animated: linear-gradient(270deg, #FFE5F0, #E5BCFF, #A5C9FF, #6B9FE8);

  /* Universe Colors */
  --color-art: #FFB6D9;
  --color-immobilier: #9D7BE8;
  --color-affaires: #6B9FE8;

  /* Spacing System (8px base) */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 2rem;      /* 32px */
  --space-lg: 4rem;      /* 64px */
  --space-xl: 6rem;      /* 96px */
  --space-2xl: 8rem;     /* 128px */

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  --font-size-xs: 0.875rem;   /* 14px */
  --font-size-sm: 1rem;       /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.5rem;     /* 24px */
  --font-size-xl: 2rem;       /* 32px */
  --font-size-2xl: 3rem;      /* 48px */
  --font-size-3xl: 4.5rem;    /* 72px */

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);

  /* Focus outline */
  --focus-ring: 0 0 0 3px rgba(157, 123, 232, 0.3);
  --focus-offset: 2px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Z-index Scale */
  --z-base: 1;
  --z-elevated: 10;
  --z-sticky: 100;
  --z-overlay: 1000;
  --z-modal: 10000;
}

/* ========================================
   2. RESET & BASE STYLES
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Selection */
::selection {
  background-color: rgba(157, 123, 232, 0.2);
  color: var(--color-text-primary);
}

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

a:hover {
  opacity: 0.7;
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: var(--focus-offset);
  box-shadow: var(--focus-ring);
}

/* Remove default focus for mouse users */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: none;
}

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

/* Lazy loaded images */
img[data-src] {
  opacity: 0;
  transition: opacity 0.3s ease;
}

img.loaded {
  opacity: 1;
}

/* ========================================
   3. UTILITY CLASSES
   ======================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-sm);
  width: 100%;
}

@media (min-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
}

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

@media (min-width: 1680px) {
  .container {
    max-width: 1600px;
    padding: 0 var(--space-xl);
  }
}

/* Scroll Reveal Animation */
[data-scroll-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-scroll-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Section Titles */
.section-title {
  font-size: clamp(1.75rem, 4vw, var(--font-size-2xl));
  font-weight: var(--font-weight-light);
  letter-spacing: 0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.section-title--centered {
  text-align: center;
}

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

.section-subtitle {
  font-size: clamp(0.95rem, 1.5vw, var(--font-size-md));
  font-weight: var(--font-weight-light);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-xl);
  letter-spacing: 0.005em;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-md);
}

.section-description {
  font-size: clamp(0.95rem, 1.5vw, var(--font-size-md));
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 600px;
}

@media (min-width: 768px) {
  .section-subtitle {
    padding: 0;
  }
}

.section-subtitle-custom {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-lg);
  letter-spacing: 0.01em;
}

/* ========================================
   4. HERO SECTION
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--space-xl) 0;
}

@media (min-width: 768px) and (min-height: 700px) {
  .hero {
    height: 100vh;
    padding: 0;
  }
}

/* Hero Background */
.hero__background {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-prism-animated);
  background-size: 400% 400%;
  animation: gradientShift 60s ease infinite;
  opacity: 0.15;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Hero Sphere */
.hero__sphere {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  pointer-events: none;
}

.sphere__inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--gradient-prism);
  opacity: 0.3;
  filter: blur(40px);
  animation: spherePulse 8s ease-in-out infinite;
}

.sphere__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(157, 123, 232, 0.2) 0%, transparent 70%);
  animation: spherePulse 8s ease-in-out infinite reverse;
}

@keyframes spherePulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
  50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
}

/* Hero Content */
.hero__content {
  position: relative;
  z-index: var(--z-elevated);
  text-align: center;
  padding: 0 var(--space-md);
  max-width: 100%;
  width: 100%;
}

@media (min-width: 768px) {
  .hero__content {
    max-width: 900px;
  }
}

@media (min-width: 1024px) {
  .hero__content {
    max-width: 1000px;
  }
}

.hero__logo {
  width: 120px;
  height: auto;
  margin: 0 auto var(--space-md);
  opacity: 0;
  transform: translateY(-20px);
  animation: 
    fadeInDown 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards,
    logoFloat 4s ease-in-out 1.2s infinite,
    logoGlow 3s ease-in-out 1.2s infinite;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.1));
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.hero__logo:hover {
  transform: translateY(-8px) scale(1.05);
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.15));
  animation-play-state: paused;
}

@media (min-width: 768px) {
  .hero__logo {
    width: 150px;
  }
}

@media (min-width: 1024px) {
  .hero__logo {
    width: 180px;
  }
}

@keyframes fadeInDown {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes logoFloat {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-12px) rotate(2deg);
  }
  50% {
    transform: translateY(0) rotate(0deg);
  }
  75% {
    transform: translateY(-8px) rotate(-2deg);
  }
}

@keyframes logoGlow {
  0%, 100% {
    filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.1));
  }
  50% {
    filter: drop-shadow(0 6px 24px rgba(140, 82, 255, 0.3)) drop-shadow(0 0 40px rgba(140, 82, 255, 0.2));
  }
}

/* Respect des préférences d'accessibilité */
@media (prefers-reduced-motion: reduce) {
  .hero__logo {
    animation: fadeInDown 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards !important;
  }
}

.hero__title {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: var(--font-weight-light);
  letter-spacing: 0.15em;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 0.3s forwards;
}

.title__letter {
  display: inline-block;
  animation: letterFloat 3s ease-in-out infinite;
}

.title__letter:nth-child(1) { animation-delay: 0s; }
.title__letter:nth-child(2) { animation-delay: 0.1s; }
.title__letter:nth-child(3) { animation-delay: 0.2s; }
.title__letter:nth-child(4) { animation-delay: 0.3s; }
.title__letter:nth-child(5) { animation-delay: 0.4s; }
.title__letter:nth-child(6) { animation-delay: 0.5s; }

@keyframes letterFloat { 
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.hero__label {
  font-size: 0.625rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.3s forwards;
}

.hero__tagline {
  font-size: clamp(1rem, 2vw, var(--font-size-lg));
  font-weight: var(--font-weight-light);
  letter-spacing: 0.01em;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 0.6s forwards;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero__description {
  font-size: clamp(0.95rem, 1.8vw, var(--font-size-lg));
  font-weight: var(--font-weight-light);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 0.9s forwards;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
}

.hero__subdescription {
  font-size: var(--font-size-md);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 1.1s forwards;
  font-weight: var(--font-weight-light);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Hero CTA */
.hero__cta {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1.5px solid var(--color-text-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 1.2s forwards;
}

.hero__cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--gradient-prism);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
  z-index: -1;
}

.hero__cta:hover {
  color: var(--color-white);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hero__cta:hover::before {
  width: 300px;
  height: 300px;
}

/* Scroll Indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-elevated);
}

.scroll-line {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--color-text-primary), transparent);
  animation: scrollFloat 2s ease-in-out infinite;
}

@keyframes scrollFloat {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(10px); }
}

/* ========================================
   5. PRÉSENTATION SECTION
   ======================================== */

.presentation {
  padding: var(--space-xl) 0;
  background: var(--color-white);
}

@media (min-width: 768px) {
  .presentation {
    padding: var(--space-2xl) 0;
  }
}

.presentation__content {
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .presentation__content {
    padding: 0 var(--space-lg);
  }
}

@media (min-width: 1024px) {
  .presentation__content {
    max-width: 900px;
  }
}

.section-label {
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
  display: block;
}

.section-title--centered + .section-label {
  text-align: center;
  margin-top: var(--space-xs);
}

.section-subdescription {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-md);
  font-weight: var(--font-weight-light);
}

/* ========================================
   6. UNIVERSES SECTION
   ======================================== */

.universes {
  padding: var(--space-2xl) 0;
  background: var(--color-background);
}

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

.universes__grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .universes__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }
}

@media (min-width: 1100px) {
  .universes__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1440px) {
  .universes__grid {
    gap: var(--space-xl);
  }
  
  .universes .container {
    max-width: 1600px;
  }
}

/* Universe Card */
.universe-card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  overflow: hidden;
}

@media (min-width: 1024px) {
  .universe-card {
    padding: var(--space-xl);
  }
}

@media (min-width: 1440px) {
  .universe-card {
    padding: 2.5rem;
  }
}

.universe-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-prism);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
}

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

.universe-card:hover::before {
  opacity: 0.05;
}

.universe-card__icon {
  position: relative;
  z-index: var(--z-base);
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
}

.universe-card:hover .universe-card__icon {
  transform: scale(1.1);
}

/* Universe-specific colors */
.universe-card[data-universe="art"]:hover .universe-card__icon {
  color: var(--color-art);
}

.universe-card[data-universe="immobilier"]:hover .universe-card__icon {
  color: var(--color-immobilier);
}

.universe-card[data-universe="affaires"]:hover .universe-card__icon {
  color: var(--color-affaires);
}

.universe-card__title {
  position: relative;
  z-index: var(--z-base);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-normal);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.02em;
}

.universe-card__subtitle {
  position: relative;
  z-index: var(--z-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  font-weight: var(--font-weight-medium);
}

.universe-card__description {
  position: relative;
  z-index: var(--z-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.universe-card__description:last-child {
  margin-bottom: 0;
}

.universe-card__glow {
  position: absolute;
  bottom: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  opacity: 0;
  filter: blur(60px);
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.universe-card[data-universe="art"] .universe-card__glow {
  background: var(--gradient-rose);
}

.universe-card[data-universe="immobilier"] .universe-card__glow {
  background: var(--gradient-violet);
}

.universe-card[data-universe="affaires"] .universe-card__glow {
  background: var(--gradient-blue);
}

.universe-card:hover .universe-card__glow {
  opacity: 0.3;
}

/* ========================================
   7. APPROCHE SECTION
   ======================================== */

.approche {
  padding: var(--space-xl) 0;
  background: var(--color-white);
}

@media (min-width: 768px) {
  .approche {
    padding: var(--space-2xl) 0;
  }
}

.approche__content {
  max-width: 1000px;
  margin: 0 auto;
  text-align: left;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .approche__content {
    padding: 0 var(--space-lg);
  }
}

@media (min-width: 1440px) {
  .approche__content {
    max-width: 1300px;
  }
}

.approche__principles {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .approche__principles {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .approche__principles {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
  }
}

@media (min-width: 1440px) {
  .approche__principles {
    gap: 2.5rem;
  }
}

.principle-card {
  position: relative;
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 16px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.principle-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.1);
}

.principle-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.principle-card__description {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========================================
   8. ATOUTS SECTION
   ======================================== */

.atouts {
  padding: var(--space-xl) 0;
  background: var(--color-background);
}

@media (min-width: 768px) {
  .atouts {
    padding: var(--space-2xl) 0;
  }
}

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

@media (min-width: 1440px) {
  .atouts .container {
    max-width: 1600px;
  }
}

.atouts__grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

@media (min-width: 640px) {
  .atouts__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .atouts__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}

@media (min-width: 1440px) {
  .atouts__grid {
    gap: var(--space-xl);
  }
}

.atout-card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: 20px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  text-align: center;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .atout-card {
    padding: var(--space-xl);
    min-height: 200px;
  }
}

@media (min-width: 1440px) {
  .atout-card {
    padding: 2.5rem;
    min-height: 220px;
  }
}

.atout-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.atout-card__number {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

.atout-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.atout-card__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}


/* ========================================
   9. CONTACT SECTION
   ======================================== */

.contact {
  padding: var(--space-2xl) 0;
  background: var(--color-black);
  color: var(--color-text-light);
  position: relative;
  overflow: hidden;
}

/* Animated Background Spheres */
.contact::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 700px;
  height: 700px;
  background: var(--gradient-rose);
  opacity: 0.2;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  animation: floatingSphere1 20s ease-in-out infinite;
}

.contact::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 650px;
  height: 650px;
  background: var(--gradient-blue);
  opacity: 0.2;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  animation: floatingSphere2 25s ease-in-out infinite;
}

/* Additional animated sphere */
.contact__background {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.contact__background::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: var(--gradient-violet);
  opacity: 0.15;
  border-radius: 50%;
  filter: blur(150px);
  animation: pulseSphere 15s ease-in-out infinite;
}

@keyframes floatingSphere1 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.2;
  }
  33% {
    transform: translate(-30px, 40px) scale(1.1);
    opacity: 0.25;
  }
  66% {
    transform: translate(20px, -30px) scale(0.95);
    opacity: 0.18;
  }
}

@keyframes floatingSphere2 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.2;
  }
  40% {
    transform: translate(40px, -30px) scale(1.15);
    opacity: 0.25;
  }
  80% {
    transform: translate(-30px, 40px) scale(0.9);
    opacity: 0.18;
  }
}

@keyframes pulseSphere {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.15;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 0.25;
  }
}

.contact__content {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: var(--z-elevated);
  padding: 0 var(--space-md);
}

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

@media (min-width: 1024px) {
  .contact__content {
    max-width: 800px;
  }
}

/* Contact Form */
.contact__form {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
              0 8px 32px rgba(0, 0, 0, 0.3),
              inset 0 1px 1px rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: relative;
  overflow: hidden;
}

/* Glass shimmer effect */
.contact__form::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.02),
    transparent
  );
  animation: formShimmer 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes formShimmer {
  0%, 100% {
    left: -100%;
  }
  50% {
    left: 100%;
  }
}

.form-group {
  position: relative;
  padding: var(--space-xs);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.form-group:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(157, 123, 232, 0.3);
  box-shadow: 0 4px 16px rgba(157, 123, 232, 0.15);
}

.form-group:focus-within {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(157, 123, 232, 0.5);
  box-shadow: 0 8px 24px rgba(157, 123, 232, 0.25),
              0 0 0 3px rgba(157, 123, 232, 0.15);
  transform: translateY(-2px);
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  color: var(--color-white);
  background: transparent;
  border: none;
  outline: none;
  transition: all var(--transition-base);
}

.form-input::placeholder {
  color: transparent;
}

.form-input:focus {
  color: var(--color-white);
}

.form-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-input:invalid:not(:placeholder-shown) {
  color: #ff8b8b;
}

.form-group:has(.form-input:invalid:not(:placeholder-shown)) {
  border-color: rgba(255, 107, 107, 0.5);
  background: rgba(255, 107, 107, 0.1);
}

.form-label {
  position: absolute;
  left: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  pointer-events: none;
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.01em;
  background: linear-gradient(90deg, 
    var(--color-text-secondary), 
    var(--color-text-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
  top: -8px;
  font-size: var(--font-size-xs);
  background: var(--gradient-prism);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
}

.form-input:invalid:not(:placeholder-shown) + .form-label {
  background: linear-gradient(90deg, #ff6b6b, #ff8787);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-prism);
  transition: width var(--transition-slow);
  border-radius: var(--radius-full);
  opacity: 0;
}

.form-input:focus ~ .form-line {
  width: 100%;
  opacity: 1;
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
  padding-top: var(--space-sm);
  line-height: 1.6;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='14' height='9' viewBox='0 0 14 9' fill='none' xmlns='https://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L7 7L13 1' stroke='%23E5BCFF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-sm) center;
  padding-right: calc(var(--space-md) + var(--space-sm));
  transition: all var(--transition-base);
}

.form-select:hover {
  background-image: url("data:image/svg+xml,%3Csvg width='14' height='9' viewBox='0 0 14 9' fill='none' xmlns='https://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L7 7L13 1' stroke='%23FFE5F0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Style for select form-group */
.form-group:has(.form-select) .form-label,
.form-group:has(.form-textarea) .form-label {
  /* Labels toujours en haut pour select et textarea */
  top: -8px;
  transform: translateY(0);
  font-size: var(--font-size-xs);
  background: var(--gradient-prism);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
}

/* Focus cohérent pour le select */
.form-group:has(.form-select):focus-within {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(157, 123, 232, 0.4);
  box-shadow: 0 8px 24px rgba(157, 123, 232, 0.12),
              0 0 0 3px rgba(157, 123, 232, 0.05);
  transform: translateY(-2px);
}

.form-select option {
  background: #1a1a1a;
  color: var(--color-white);
  padding: var(--space-sm);
  font-weight: var(--font-weight-normal);
}

/* Style pour l'option "Autre" */
.form-select option[value="autre"] {
  border-top: 1px solid rgba(157, 123, 232, 0.4);
  background: linear-gradient(to right, rgba(255, 229, 240, 0.2), rgba(229, 188, 255, 0.2));
  font-style: italic;
}

/* Animation pour le select quand une option est sélectionnée */
.form-select:not([value=""]) {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
}

/* Indicateur visuel pour l'univers sélectionné */
.form-group:has(.form-select:not([value=""])) {
  background: rgba(255, 255, 255, 0.12);
}

.form-group:has(.form-select:not([value=""])) .form-label {
  background: var(--gradient-prism);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Submit Button */
.form-submit {
  position: relative;
  padding: 1.125rem 3.5rem;
  margin-top: var(--space-lg);
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--gradient-prism);
  color: var(--color-white);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-base);
  align-self: center;
  box-shadow: 0 8px 32px rgba(157, 123, 232, 0.3),
              0 4px 16px rgba(107, 159, 232, 0.2),
              inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

/* Animated gradient background */
.form-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.2) 0%, 
    transparent 50%, 
    rgba(255, 255, 255, 0.2) 100%
  );
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.form-submit:hover::before {
  transform: translateX(100%);
}

.submit__text {
  position: relative;
  z-index: var(--z-elevated);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.submit__text::after {
  content: '→';
  font-size: 1.2em;
  transition: transform var(--transition-base);
}

.form-submit:hover .submit__text::after {
  transform: translateX(4px);
}

.submit__ripple {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    #A5C9FF 0%, 
    #9D7BE8 50%, 
    #FFB6D9 100%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: var(--z-base);
}

.form-submit:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 48px rgba(157, 123, 232, 0.4),
              0 8px 24px rgba(107, 159, 232, 0.3),
              inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.form-submit:hover .submit__ripple {
  opacity: 0.3;
}

.form-submit:active {
  transform: translateY(-2px) scale(1);
}

.form-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(0.5);
}

/* Success state */
.form-submit.success {
  background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
  animation: successPulse 0.6s ease;
}

@keyframes successPulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Contact Section Titles */
.contact .section-title {
  position: relative;
  display: block;
  text-align: center;
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-sm);
  color: var(--color-white);
}

.contact .section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--gradient-prism);
  border-radius: var(--radius-full);
  box-shadow: 0 2px 12px rgba(157, 123, 232, 0.5);
}

.contact .section-subtitle {
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  font-size: var(--font-size-md);
  line-height: 1.7;
  padding: 0 var(--space-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
}

/* Responsive Form Styles */
@media (max-width: 768px) {
  .contact__form {
    padding: var(--space-md);
    gap: var(--space-md);
  }

  .form-submit {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-xs);
  }

  .form-group {
    padding: var(--space-xs) var(--space-sm);
  }
}

@media (max-width: 480px) {
  .contact__form {
    padding: var(--space-sm);
  }

  .form-submit {
    width: 100%;
    padding: 1rem;
  }

  .contact .section-title {
    font-size: var(--font-size-xl);
  }

  .contact .section-subtitle {
    font-size: var(--font-size-sm);
  }
}

/* Form Loading State */
.contact__form.loading {
  pointer-events: none;
  opacity: 0.7;
}

.contact__form.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  border: 3px solid rgba(157, 123, 232, 0.15);
  border-top-color: var(--color-immobilier);
  border-right-color: var(--color-art);
  border-radius: 50%;
  animation: formLoading 0.8s linear infinite;
  z-index: 100;
}

@keyframes formLoading {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Error Animation */
@keyframes errorSlideIn {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Form Error Styles */
.form-error {
  position: relative;
  overflow: hidden;
}

.form-error::before {
  content: '⚠';
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2em;
  animation: errorPulse 2s ease-in-out infinite;
}

@keyframes errorPulse {
  0%, 100% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 0.7;
    transform: translateY(-50%) scale(1.1);
  }
}

/* Form Shake Animation on Error */
@keyframes formShake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-8px);
  }
  75% {
    transform: translateX(8px);
  }
}

/* ========================================
   10. STICKY LIQUID GLASS NAVIGATION
   ======================================== */

.nav-glass {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-modal);
  padding: 0.5rem 0;
  opacity: 0;
  transform: translateY(-100%);
  transition: all var(--transition-slow);
  pointer-events: none;
}

.nav-glass.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

/* Navigation on dark background */
.nav-glass.on-dark .nav-glass__container {
  background: rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
              0 1px 2px rgba(0, 0, 0, 0.3),
              inset 0 1px 1px rgba(255, 255, 255, 0.15),
              inset 0 -1px 1px rgba(0, 0, 0, 0.3);
  transition: background var(--transition-slow),
              border-color var(--transition-slow),
              box-shadow var(--transition-slow);
}

.nav-glass__container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  padding: 0.5rem 1.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08),
              0 1px 2px rgba(0, 0, 0, 0.04),
              inset 0 1px 1px rgba(255, 255, 255, 0.5),
              inset 0 -1px 1px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

/* Liquid glass shimmer effect */
.nav-glass__container::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 30%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 70%
  );
  animation: liquidShimmer 8s ease-in-out infinite;
  pointer-events: none;
  transition: background var(--transition-slow);
}

/* Enhanced shimmer on dark background */
.nav-glass.on-dark .nav-glass__container::before {
  background: linear-gradient(
    45deg,
    transparent 30%,
    rgba(255, 255, 255, 0.4) 50%,
    transparent 70%
  );
}

@keyframes liquidShimmer {
  0%, 100% {
    transform: translate(-50%, -50%) rotate(0deg);
    opacity: 0;
  }
  50% {
    transform: translate(0%, 0%) rotate(180deg);
    opacity: 0.5;
  }
}

/* Logo */
.nav-glass__logo {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.1em;
  background: var(--gradient-prism);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: var(--z-elevated);
  text-decoration: none;
  transition: all var(--transition-base);
}

.nav-glass__logo:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* Logo on dark background */
.nav-glass.on-dark .nav-glass__logo {
  background: linear-gradient(135deg, #FFFFFF 0%, #F0F0F0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Menu */
.nav-glass__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  z-index: var(--z-elevated);
}

/* Links */
.nav-glass__link {
  position: relative;
  display: inline-block;
  padding: 0.375rem 0.875rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  overflow: hidden;
}

/* Links on dark background */
.nav-glass.on-dark .nav-glass__link {
  color: var(--color-white);
}

.nav-glass.on-dark .nav-glass__link::after {
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0.8), 
    rgba(255, 255, 255, 0.6)
  );
}

.nav-glass.on-dark .nav-glass__link:hover::before,
.nav-glass.on-dark .nav-glass__link.active::before {
  background: rgba(255, 255, 255, 0.15);
}

/* Liquid hover effect */
.nav-glass__link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.5);
  border-radius: inherit;
  transform: scale(0);
  opacity: 0;
  transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  filter: blur(0px);
}

.nav-glass__link:hover::before {
  filter: blur(2px);
}

.nav-glass__link:hover::before,
.nav-glass__link.active::before {
  transform: scale(1);
  opacity: 1;
}

.nav-glass__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-prism);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.nav-glass__link:hover::after,
.nav-glass__link.active::after {
  width: 80%;
}

/* Link text */
.nav-glass__link span {
  position: relative;
  z-index: var(--z-base);
}

/* CTA Link */
.nav-glass__link--cta {
  background: var(--gradient-prism);
  color: var(--color-white);
  padding: 0.5rem 1.5rem;
  box-shadow: 0 4px 12px rgba(157, 123, 232, 0.3);
  font-weight: var(--font-weight-semibold);
  position: relative;
}

.nav-glass__link--cta::before {
  background: rgba(255, 255, 255, 0.2);
}

.nav-glass__link--cta::after {
  display: none;
}

.nav-glass__link--cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(157, 123, 232, 0.4);
}

/* CTA on dark background - enhanced glow */
.nav-glass.on-dark .nav-glass__link--cta {
  box-shadow: 0 4px 16px rgba(157, 123, 232, 0.5);
}

.nav-glass.on-dark .nav-glass__link--cta:hover {
  box-shadow: 0 6px 24px rgba(157, 123, 232, 0.6);
}

/* Ripple effect on click */
.nav-glass__link:active {
  transform: scale(0.95);
}

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* Liquid blob effect on hover */
.nav-glass__container::after {
  content: '';
  position: absolute;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(157, 123, 232, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
  filter: blur(20px);
}

.nav-glass__container:hover::after {
  opacity: 1;
  animation: liquidBlob 3s ease-in-out infinite;
}

@keyframes liquidBlob {
  0%, 100% {
    transform: translate(20%, 0) scale(1);
  }
  33% {
    transform: translate(60%, -10%) scale(1.2);
  }
  66% {
    transform: translate(80%, 10%) scale(0.9);
  }
}

/* ========================================
   11. FOOTER
   ======================================== */

.footer {
  padding: var(--space-lg) 0;
  background: var(--color-white);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.footer__text {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.footer__link {
  margin: 0 var(--space-xs);
  transition: color var(--transition-fast);
}

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

/* ========================================
   12. RESPONSIVE ADJUSTMENTS
   ======================================== */

/* Progressive Menu Visibility based on screen width */
/* Ordre de priorité: Contact > Accueil > Domaines > Atouts > Approche > Présentation */

/* Very Small screens (< 480px) - Only: Accueil, Domaines, Contact */
@media (max-width: 479px) {
  .nav-glass__menu li:nth-child(2),  /* Présentation */
  .nav-glass__menu li:nth-child(4),  /* Approche */
  .nav-glass__menu li:nth-child(5) { /* Atouts */
    display: none;
  }
}

/* Small screens (480px - 639px) - Add: Atouts */
@media (min-width: 480px) and (max-width: 639px) {
  .nav-glass__menu li:nth-child(2),  /* Présentation */
  .nav-glass__menu li:nth-child(4) { /* Approche */
    display: none;
  }
}

/* Medium screens (640px - 767px) - Add: Approche */
@media (min-width: 640px) and (max-width: 767px) {
  .nav-glass__menu li:nth-child(2) { /* Présentation */
    display: none;
  }
}

/* Large screens (768px+) - All visible */
/* No hiding needed, all items visible by default */

/* Mobile Navigation - Always visible */
@media (max-width: 767px) {
  .nav-glass {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
  }
  
  .nav-glass__container {
    padding: 0.5rem 1rem;
  }
  
  .nav-glass__menu {
    gap: 0.5rem;
  }
  
  .nav-glass__link {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
  }
}

/* Tablet and up */
@media (min-width: 768px) {
  .nav-glass {
    opacity: 0;
    transform: translateY(-20px);
  }
  
  .nav-glass.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Desktop specific */
@media (min-width: 1024px) {
  .nav-glass__container {
    padding: 0.625rem 1.5rem;
  }

  .nav-glass__link {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
  }
}

/* Original responsive adjustments */

@media (max-width: 767px) {
  :root {
    --font-size-3xl: 3rem;
    --font-size-2xl: 2rem;
    --font-size-xl: 1.5rem;
  }

  .hero__sphere {
    width: 300px;
    height: 300px;
  }

  .section-title {
    font-size: var(--font-size-xl);
  }

  .universes,
  .contact {
    padding: var(--space-xl) 0;
  }
}

/* ========================================
   13. PERFORMANCE OPTIMIZATIONS
   ======================================== */

/* GPU Acceleration for animated elements */
/* Only use will-change for elements that will actually animate */
.hero__gradient,
.sphere__inner,
.sphere__glow,
.sphere-3d {
  will-change: transform;
}

/* Contain property for better rendering performance */
.hero,
.universes,
.contact {
  contain: layout style paint;
}

.universe-card,
.atout-card {
  contain: layout style;
}

/* Use transform and opacity for smooth animations */
.hero__cta,
.form-submit,
.universe-card,
.atout-card {
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* Optimize font rendering */
body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Reduce repaints for fixed elements */
.hero__scroll-indicator {
  contain: strict;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Keep essential transforms but remove animations */
  .hero__gradient,
  .sphere__inner,
  .sphere__glow,
  .sphere-3d {
    animation: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text-secondary: #333333;
  }

  .universe-card,
  .form-input {
    border-width: 2px;
  }
}

/* Dark mode support (optional future enhancement) */
@media (prefers-color-scheme: dark) {
  /* Uncomment when implementing dark mode
  :root {
    --color-background: #1A1A1A;
    --color-white: #0A0A0A;
    --color-text-primary: #FAFAFA;
    --color-text-secondary: #CCCCCC;
  }
  */
}

/* Print styles */
@media print {
  .hero__scroll-indicator,
  .universe-card__glow,
  .form-submit {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }
}