/* ============================================
   PORTFOLIO BTS SIO — Jules GODEST
   Design System — main.css
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   1. CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Colors */
  --color-primary: #2563EB;
  --color-primary-light: #3B82F6;
  --color-primary-dark: #1D4ED8;
  --color-primary-50: #EFF6FF;
  --color-primary-100: #DBEAFE;
  --color-accent: #06B6D4;
  --color-accent-light: #22D3EE;
  --color-accent-dark: #0891B2;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;

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

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Borders & Shadows */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
}

/* ============================================
   2. CSS RESET
   ============================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-gray-300);
  background-color: #0B1121;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

/* ============================================
   3. LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section--gray {
  background-color: #0F172A;
}

.section--white {
  background-color: #111827;
}

.section--tinted {
  background: linear-gradient(135deg, #0F172A 0%, #0D1B2A 100%);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  letter-spacing: -0.025em;
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  max-width: 600px;
  margin: 0 auto;
  font-weight: 400;
}

.section__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-8);
}

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

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   4. HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(11, 17, 33, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.header__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.025em;
}

.header__logo span {
  color: var(--color-primary-light);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-400);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary-light);
  background-color: rgba(37, 99, 235, 0.15);
}

/* Hamburger menu */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: var(--space-2);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-gray-300);
  border-radius: 2px;
  transition: all var(--transition-base);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__list {
    position: absolute;
    top: var(--header-height);
    right: 0;
    left: 0;
    flex-direction: column;
    background: #0F172A;
    padding: var(--space-4) var(--space-6);
    gap: var(--space-1);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  }

  .nav__list.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    font-size: var(--font-size-base);
    padding: var(--space-3) var(--space-4);
    width: 100%;
    color: var(--color-gray-200);
    border-radius: var(--radius-md);
  }

  .nav__link:hover,
  .nav__link.active {
    color: var(--color-white);
    background-color: rgba(37, 99, 235, 0.2);
  }

  .nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ============================================
   5. HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: linear-gradient(135deg, #0B1121 0%, #0F172A 40%, #1A2744 70%, #162044 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-300);
  margin-bottom: var(--space-8);
  backdrop-filter: blur(8px);
}

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

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(1.5);
  }
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}

.hero__title .highlight {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  margin-bottom: var(--space-10);
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Wave separator */
.wave-separator {
  position: relative;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  margin-top: -1px;
}

.wave-separator svg {
  width: 100%;
  height: 80px;
  display: block;
}

@media (max-width: 768px) {
  .hero__title {
    font-size: var(--font-size-3xl);
  }

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

/* ============================================
   6. BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  text-decoration: none;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn--primary:hover {
  background: var(--color-primary-light);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn--outline {
  background: transparent;
  color: var(--color-gray-300);
  border: 1px solid var(--color-gray-600);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  border-color: var(--color-gray-400);
  transform: translateY(-2px);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
}

/* ============================================
   7. CARDS
   ============================================ */
.card {
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transform: translateY(-4px);
}

.card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  background: rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
}

.card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.card__text {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

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

.card__link:hover {
  gap: var(--space-3);
}

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

.project-card__header {
  padding: var(--space-6) var(--space-6) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.project-card__category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.project-card__category--reseau {
  background: #DBEAFE;
  color: #1E40AF;
}

.project-card__category--systeme {
  background: #D1FAE5;
  color: #065F46;
}

.project-card__category--dev {
  background: #FEF3C7;
  color: #92400E;
}

.project-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.project-card__context {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.project-card__body {
  padding: var(--space-5) var(--space-6);
}

.project-card__etiquette {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary-light);
  background: rgba(37, 99, 235, 0.1);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: var(--space-2);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.project-card__description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.project-card__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: flex-end;
  margin-top: auto;
}

/* ============================================
   8. TAGS & BADGES
   ============================================ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-gray-300);
}

.tag--primary {
  background: rgba(37, 99, 235, 0.15);
  color: var(--color-primary-light);
}

.tag--accent {
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-accent-light);
}

/* ============================================
   9. ABOUT SECTION
   ============================================ */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about__text p {
  margin-bottom: var(--space-5);
  color: var(--color-gray-400);
}

.about__qualities {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.quality {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: #1E293B;
  border-radius: var(--radius-lg);
}

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

.quality__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-200);
}

.about__visual {
  position: relative;
}

.about__card {
  background: linear-gradient(135deg, #1E293B, #1A2744);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
}

.about__card-icon {
  font-size: 4rem;
  margin-bottom: var(--space-6);
}

.about__card-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.about__card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-6);
}

.about__hobbies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.hobby-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-300);
}

@media (max-width: 768px) {
  .about {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

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

/* ============================================
   10. SKILLS PREVIEW
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

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

/* ============================================
   11. TIMELINE
   ============================================ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24px;
  width: 2px;
  background: linear-gradient(to bottom, rgba(59, 130, 246, 0.3), rgba(34, 211, 238, 0.3), rgba(59, 130, 246, 0.3));
}

.timeline__item {
  position: relative;
  padding-left: 64px;
  padding-bottom: var(--space-10);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: 16px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: #0F172A;
  border: 3px solid var(--color-primary-light);
  border-radius: 50%;
  z-index: 1;
}

.timeline__item--stage .timeline__dot {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.timeline__item--projet .timeline__dot {
  border-color: var(--color-accent);
}

.timeline__year {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.timeline__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-1);
}

.timeline__location {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-3);
}

.timeline__description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.7;
}

/* ============================================
   12. COMPETENCES PAGE
   ============================================ */
.competence-bloc {
  margin-bottom: var(--space-12);
}

.competence-bloc__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid rgba(59, 130, 246, 0.2);
}

.competence-bloc__icon {
  font-size: var(--font-size-3xl);
}

.competence-bloc__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
}

.competence-item {
  padding: var(--space-5) var(--space-6);
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.competence-item:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.competence-item__title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-200);
  margin-bottom: var(--space-2);
}

.competence-item__desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-3);
}

.competence-item__projects {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ============================================
   13. PROJECT DETAIL PAGE
   ============================================ */
.project-detail {
  padding-top: calc(var(--header-height) + var(--space-12));
}

.project-detail__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-400);
  margin-bottom: var(--space-8);
}

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

.project-detail__category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.project-detail__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.project-detail__meta {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.project-detail__content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
}

.project-detail__main h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-top: var(--space-10);
  margin-bottom: var(--space-5);
}

.project-detail__main h2:first-child {
  margin-top: 0;
}

.project-detail__main p {
  color: var(--color-gray-400);
  margin-bottom: var(--space-5);
}

.project-detail__main ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-5);
}

.project-detail__main ul li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

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

/* Analyse réflexive card */
.reflexive-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(26, 39, 68, 0.8));
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-top: var(--space-10);
}

.reflexive-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.reflexive-card__section {
  margin-bottom: var(--space-6);
}

.reflexive-card__section:last-child {
  margin-bottom: 0;
}

.reflexive-card__label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary-light);
  margin-bottom: var(--space-2);
}

.reflexive-card__text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.8;
}

/* Sidebar */
.project-detail__sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-8));
  align-self: start;
}

.sidebar-card {
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.sidebar-card__title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-gray-200);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

  .project-detail__title {
    font-size: var(--font-size-2xl);
  }
}

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

.contact-info {
  padding: var(--space-8);
}

.contact-info__item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: #1E293B;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.contact-info__item:hover {
  background: #263548;
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.contact-info__label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-info__value {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-200);
}

/* Form */
.contact-form {
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-300);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--color-gray-200);
  background: #0F172A;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
  background: #0B1121;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

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

/* ============================================
   15. FOOTER
   ============================================ */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-12) 0 var(--space-8);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__brand {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
}

.footer__brand span {
  color: var(--color-primary-light);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__links a {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  text-align: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-800);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* ============================================
   16. CTA SECTION
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary), #1E40AF);
  padding: var(--space-20) 0;
  text-align: center;
  color: var(--color-white);
}

.cta-section__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
}

.cta-section__text {
  font-size: var(--font-size-lg);
  opacity: 0.85;
  margin-bottom: var(--space-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-white);
}

/* ============================================
   17. FILTERS
   ============================================ */
.filters {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-400);
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* ============================================
   18. SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animations */
.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

.reveal-delay-4 {
  transition-delay: 0.4s;
}

/* ============================================
   19. DOSSIER E5 PAGE
   ============================================ */
.dossier-e5 {
  padding-top: calc(var(--header-height) + var(--space-12));
}

.dossier-e5__print-btn {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 100;
}

.dossier-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-8);
}

.dossier-table th,
.dossier-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.dossier-table th {
  background: #1E293B;
  font-weight: 600;
  color: var(--color-gray-200);
}

.dossier-table td {
  color: var(--color-gray-400);
}

/* ============================================
   20. PAGE HEADER (interior pages)
   ============================================ */
.page-header {
  padding-top: calc(var(--header-height) + var(--space-16));
  padding-bottom: var(--space-12);
  background: linear-gradient(135deg, #0B1121 0%, #0F172A 50%, #1A2744 100%);
  text-align: center;
}

.page-header__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  letter-spacing: -0.025em;
}

.page-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   21. UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

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

.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

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

/* ============================================
   LIGHT THEME OVERRIDES
   ============================================ */
body.light-theme {
  background-color: #F1F5F9;
  color: #334155;
}
.light-theme .section--gray { background-color: #E2E8F0; }
.light-theme .section--white { background-color: #FFFFFF; }
.light-theme .header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}
.light-theme .header__logo { color: #1E293B; }
.light-theme .nav__link { color: #475569; }
.light-theme .nav__link:hover, .light-theme .nav__link.active {
  color: var(--color-primary-dark);
  background-color: rgba(37, 99, 235, 0.1);
}
.light-theme .nav__list {
  background: #FFFFFF;
}
.light-theme .hero {
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 40%, #BFDBFE 100%);
}
.light-theme .hero__title,
.light-theme .section__title,
.light-theme .page-header__title { color: #0F172A; }
.light-theme .hero__description,
.light-theme .section__subtitle,
.light-theme .page-header__subtitle { color: #475569; }
.light-theme .hero__badge {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: #1E40AF;
}
.light-theme .card,
.light-theme .sidebar-card {
  background: #FFFFFF;
  border-color: rgba(0, 0, 0, 0.07);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.light-theme .card:hover {
  box-shadow: 0 8px 24px rgba(37,99,235,0.12);
}
.light-theme .card__title,
.light-theme .project-card__title,
.light-theme .sidebar-card__title,
.light-theme .competence-bloc__title,
.light-theme .competence-item__title { color: #1E293B; }
.light-theme .card__text,
.light-theme .project-card__description { color: #475569; }
.light-theme .project-card__header,
.light-theme .project-card__footer { border-color: rgba(0,0,0,0.06); }
.light-theme .project-card__context { color: #64748B; }
.light-theme .tag {
  background: rgba(0,0,0,0.06);
  color: #475569;
}
.light-theme .about__card {
  background: linear-gradient(135deg, #FFFFFF, #EFF6FF);
  border-color: rgba(37,99,235,0.15);
}
.light-theme .quality {
  background: #F8FAFC;
  border: 1px solid rgba(0,0,0,0.05);
}
.light-theme .quality__label { color: #334155; }
.light-theme .footer {
  background-color: #F8FAFC;
  border-top: 1px solid rgba(0,0,0,0.08);
}
.light-theme .footer__brand { color: #1E293B; }
.light-theme .footer__bottom { color: #64748B; }
.light-theme .timeline__title { color: #1E293B; }
.light-theme .wave-separator svg path { fill: #F1F5F9; }
.light-theme .cta-section { background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%); }
.light-theme .reflexive-card {
  background: #F8FAFC;
  border: 1px solid rgba(0,0,0,0.07);
}
.light-theme .project-detail__main h2 { color: #1E293B; }
.light-theme .project-detail__main p,
.light-theme .project-detail__main li { color: #475569; }
.light-theme .section--white .btn--outline {
  color: #334155;
  border-color: #94A3B8;
}
.light-theme .section--white .btn--outline:hover {
  background: rgba(0,0,0,0.05);
  color: #1E293B;
}

/* -- Light theme readability fixes -- */
.light-theme .about__text p { color: #334155; }
.light-theme .section__subtitle { color: #475569; }
.light-theme .hero__description { color: #334155; }
.light-theme .timeline__description { color: #475569; }
.light-theme .timeline__location { color: #64748B; }
.light-theme .competence-item__desc { color: #475569; }
.light-theme .reflexive-card { background: #F1F5F9; border: 1px solid #CBD5E1; }
.light-theme .reflexive-card__label { color: #1E293B; }
.light-theme .reflexive-card__text { color: #334155; }
.light-theme .reflexive-card__section + .reflexive-card__section { border-top: 1px solid #CBD5E1; }
.light-theme .competence-bloc__header { border-bottom-color: rgba(0,0,0,0.08); }
.light-theme .page-header { background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%); }
.light-theme .project-detail__back { color: #2563EB; }
.light-theme .project-detail__main > p { color: #334155; }
.light-theme .project-detail__main li { color: #475569; }
.light-theme .footer__brand { color: #1E293B; }
.light-theme a { color: var(--color-primary-dark); }
.light-theme a:hover { color: var(--color-primary); }
.light-theme a.btn--primary { color: var(--color-white); }
.light-theme a.btn--primary:hover { color: var(--color-white); }
.light-theme .btn--outline {
  color: #1E293B;
  border-color: #94A3B8;
}
.light-theme .btn--outline:hover {
  background: rgba(0,0,0,0.06);
  color: #0F172A;
  border-color: #64748B;
}
.light-theme .about__card-subtitle { color: #475569; }
.light-theme .project-card__context { color: #64748B; }
.light-theme .cta-section__title { color: #FFFFFF; }
.light-theme .cta-section__text { color: rgba(255,255,255,0.85); }

/* -- Theme toggle switch -- */
.theme-switch-wrapper {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.theme-switch-wrapper svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}
.theme-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.theme-switch__slider {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 22px;
  cursor: pointer;
  transition: background var(--transition-base);
}
.theme-switch__slider::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 2px;
  top: 2px;
  background: #FFFFFF;
  border-radius: 50%;
  transition: transform var(--transition-base);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.theme-switch input:checked + .theme-switch__slider {
  background: rgba(37,99,235,0.5);
  border-color: rgba(37,99,235,0.4);
}
.theme-switch input:checked + .theme-switch__slider::after {
  transform: translateX(18px);
  background: #FFFFFF;
}

.light-theme .theme-switch__slider {
  background: rgba(37,99,235,0.12);
  border-color: rgba(37,99,235,0.25);
}
.light-theme .theme-switch input:checked + .theme-switch__slider {
  background: rgba(37,99,235,0.4);
}
.light-theme .theme-switch-wrapper svg { color: #475569; }
@media (max-width: 768px) {
  .theme-switch-wrapper {
    padding: var(--space-3) var(--space-4);
  }
}

/* Fix: wave separator and hero dark line in light theme */
.light-theme .wave-separator { display: none; }
.light-theme .hero {
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 60%, #C7D2FE 100%);
  border-bottom: none;
}

/* Fix: CTA section Mon CV btn--outline better visibility */
.light-theme .cta-section .btn--outline {
  color: #FFFFFF !important;
  border-color: rgba(255,255,255,0.6) !important;
  background: rgba(255,255,255,0.08);
}
.light-theme .cta-section .btn--outline:hover {
  background: rgba(255,255,255,0.18) !important;
  color: #FFFFFF !important;
}

/* ============================================
   11. PROJECT GALLERY & LIGHTBOX
   ============================================ */
.project-gallery {
  margin: var(--space-8) 0 var(--space-10);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
}

.project-gallery__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-7);
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--color-white);
  transition: background var(--transition-fast);
  background: rgba(37, 99, 235, 0.08);
}

.project-gallery__trigger:hover {
  background: rgba(37, 99, 235, 0.15);
}

.project-gallery__trigger::-webkit-details-marker {
  display: none;
}

.project-gallery__trigger svg {
  width: 18px;
  height: 18px;
  opacity: 0.6;
  transition: transform var(--transition-base);
}

.project-gallery[open] .project-gallery__trigger svg {
  transform: rotate(180deg);
}

.project-gallery__content {
  padding: var(--space-6);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  max-height: 600px;
  overflow-y: auto;
}

.project-gallery__content img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
  border: 2px solid rgba(255, 255, 255, 0.05);
}

.project-gallery__content img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

/* Lightbox styles */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
  padding: var(--space-6);
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox__content {
  position: relative;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__image {
  max-width: 95vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lightbox.open .lightbox__image {
  transform: scale(1);
}

.lightbox__close {
  position: absolute;
  top: -50px;
  right: 0;
  color: white;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  cursor: pointer;
  font-size: 24px;
  transition: background 0.2s;
}

.lightbox__close:hover {
  background: rgba(255,255,255,0.2);
}

/* Light theme overrides */
.light-theme .project-gallery {
  border-color: rgba(0,0,0,0.08);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.light-theme .project-gallery__trigger {
  color: #1E293B;
  background: rgba(37, 99, 235, 0.04);
}

.light-theme .project-gallery__trigger:hover {
  background: rgba(37, 99, 235, 0.08);
}

.light-theme .project-gallery__content img {
  border-color: rgba(0,0,0,0.05);
}