/* ==========================================================================
   Variables & reset
   ========================================================================== */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-dark: #0f1729;
  --text: #101828;
  --text-muted: #5b6472;
  --text-on-dark: #f4f6fb;
  --text-muted-on-dark: #aab2c5;
  --border: #e5e9f0;
  --accent: #2454e0;
  --accent-dark: #1a3fb0;
  --accent-soft: #eaf0ff;
  --success: #12805c;
  --warning: #b7791f;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 20px 50px rgba(16, 24, 40, 0.14);
  --navbar-h: 76px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

section[id] {
  scroll-margin-top: var(--navbar-h);
}

/* ==========================================================================
   Buttons, tags, badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 20px rgba(36, 84, 224, 0.25);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(36, 84, 224, 0.32);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.badge-pill {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 22px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
}

.tag-sm {
  padding: 5px 12px;
  font-size: 0.78rem;
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent-dark);
}

/* ==========================================================================
   Section scaffolding
   ========================================================================== */
.section {
  padding: 100px 0;
}

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

.section-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-label-dark {
  color: #8fb0ff;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

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

.section-intro {
  max-width: 720px;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
}

.section-intro-dark {
  color: var(--text-muted-on-dark);
}

.subsection-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text);
}

.subsection-title-spaced {
  margin-top: 64px;
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--navbar-h);
  display: flex;
  align-items: center;
  transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 999px;
  transition: all 0.2s ease;
  display: block;
}

.nav-links a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav-links a.active {
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-weight: 600;
}

/* Menu hamburger */
.menu-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.menu-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding: calc(var(--navbar-h) + 70px) 0 90px;
  background: radial-gradient(circle at 85% 15%, var(--accent-soft) 0%, transparent 45%),
              linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%);
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-text {
  flex: 1 1 560px;
}

.hero-text h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 6px;
}

.hero-role {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-stats .stat {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}

.hero-stats span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.hero-media {
  flex: 0 0 320px;
  display: flex;
  justify-content: center;
}

.hero-photo-frame {
  position: relative;
  width: 300px;
  height: 300px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--accent) 0%, #6c8fff 100%);
  padding: 8px;
  box-shadow: var(--shadow-lg);
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 26px;
}

/* ==========================================================================
   About
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 18px;
}

.about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.fact-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.fact-card h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 700;
}

.fact-card p {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
}

/* ==========================================================================
   Skills
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.skill-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.25s ease;
}

.skill-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.skill-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

/* ==========================================================================
   Formation
   ========================================================================== */
.timeline {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.timeline:last-child {
  margin-bottom: 0;
}

.formation-item {
  flex: 1 1 260px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: left;
  transition: all 0.25s ease;
}

.formation-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.formation-item img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-bottom: 14px;
}

.formation-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.formation-item p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 12px;
}

.status {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.8rem;
}

.status-acquis {
  background: #e6f6ef;
  color: var(--success);
}

.status-encours {
  background: #fdf3e0;
  color: var(--warning);
}

/* ==========================================================================
   Projects
   ========================================================================== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: var(--accent);
}

.project-date {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  flex-grow: 1;
}

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

.project-card-sm {
  padding: 22px;
}

/* ==========================================================================
   Modales
   ========================================================================== */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(16, 24, 40, 0.55);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  padding: 36px;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  max-width: 620px;
  width: 90%;
  max-height: 82vh;
  overflow-y: auto;
}

.modal-content .project-date {
  display: block;
  margin-bottom: 6px;
}

.modal-content h3 {
  color: var(--text);
  margin-bottom: 16px;
  font-size: 1.4rem;
  font-weight: 800;
}

.modal-content p {
  color: var(--text-muted);
  line-height: 1.7;
  text-align: left;
  margin-bottom: 14px;
}

.modal-content .tag-list {
  margin-top: 18px;
}

.close {
  position: absolute;
  top: 18px;
  right: 22px;
  cursor: pointer;
  font-size: 26px;
  line-height: 1;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-section {
  background: var(--bg-dark);
  padding: 100px 0 0;
  text-align: center;
}

.contact-section .section-label,
.contact-section .section-title,
.contact-section .section-intro {
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 28px 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  color: var(--text-on-dark);
  font-weight: 600;
  font-size: 0.92rem;
  transition: all 0.25s ease;
  word-break: break-word;
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent);
  transform: translateY(-4px);
}

.contact-icon {
  width: 44px;
  height: 44px;
  padding: 9px;
  box-sizing: border-box;
  background: #fff;
  border-radius: 50%;
  object-fit: contain;
}

.footer {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.footer p {
  color: var(--text-muted-on-dark);
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media screen and (max-width: 1024px) {
  .hero-text h1 {
    font-size: 2.6rem;
  }

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

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

@media screen and (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--navbar-h);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    text-align: center;
    padding: 14px;
  }

  .menu-hamburger {
    display: flex;
  }

  .hero-inner {
    flex-direction: column-reverse;
    text-align: center;
    gap: 40px;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta,
  .hero-stats {
    justify-content: center;
  }

  .hero-media {
    flex: none;
  }

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

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

@media screen and (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  .contact-section {
    padding: 70px 0 0;
  }

  .hero {
    padding: calc(var(--navbar-h) + 40px) 0 60px;
  }

  .hero-text h1 {
    font-size: 2.1rem;
  }

  .hero-photo-frame {
    width: 230px;
    height: 230px;
  }

  .section-title {
    font-size: 1.7rem;
  }

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

  .about-facts {
    grid-template-columns: 1fr;
  }

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

@media screen and (max-width: 480px) {
  .hero-stats {
    gap: 24px;
  }

  .btn {
    width: 100%;
  }

  .hero-cta {
    flex-direction: column;
  }

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