/* ============================================
   VARIABLES & RESET
   ============================================ */
:root {
  /* Couleurs */
  --clr-bg:         #0f1117;
  --clr-bg-card:    #1a1d27;
  --clr-bg-hover:   #22263a;
  --clr-accent:     #6c63ff;
  --clr-accent-2:   #a78bfa;
  --clr-text:       #e2e8f0;
  --clr-text-muted: #8892a4;
  --clr-border:     #2a2f45;
  --clr-white:      #ffffff;

  /* Typographie */
  --font-body:    'Inter', system-ui, sans-serif;
  --font-heading: 'Space Grotesk', system-ui, sans-serif;

  /* Tailles */
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Espacements */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;

  /* Bordures */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Ombres */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-accent: 0 0 30px rgba(108,99,255,0.2);

  /* Transitions */
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  font-size: var(--text-base);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ============================================
   UTILITAIRES
   ============================================ */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  color: var(--clr-white);
  margin-bottom: var(--space-lg);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.link-arrow {
  color: var(--clr-accent-2);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: color var(--transition);
  white-space: nowrap;
}

.link-arrow:hover {
  color: var(--clr-white);
}

/* ============================================
   BOUTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--clr-accent-2);
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(108,99,255,0.4);
}

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

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

/* ============================================
   NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--clr-accent-2);
  transition: color var(--transition);
}

.nav-logo:hover {
  color: var(--clr-white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-link {
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--clr-white);
  border-bottom-color: var(--clr-accent);
}

.nav-cta {
  background: var(--clr-accent);
  color: var(--clr-white) !important;
  border: none !important;
  padding: 0.4rem 1.2rem;
  border-radius: var(--radius-full);
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--clr-accent-2);
  transform: translateY(-1px);
}

/* Burger menu (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ============================================
   HERO — ESPACE / GALAXIE
   ============================================ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #00000a;
}

/* Canvas étoiles */
#starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* Nébuleuses */
.hero-nebula {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
}

.nebula-1 {
  width: 600px;
  height: 600px;
  top: -100px;
  left: -150px;
  background: radial-gradient(circle, #4f3cf7, transparent 70%);
  animation: nebulaDrift 20s ease-in-out infinite alternate;
}

.nebula-2 {
  width: 500px;
  height: 500px;
  bottom: -80px;
  right: -100px;
  background: radial-gradient(circle, #0f4a8a, transparent 70%);
  animation: nebulaDrift 25s ease-in-out infinite alternate-reverse;
}

.nebula-3 {
  width: 400px;
  height: 400px;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #2d1b69, transparent 70%);
  animation: nebulaDrift 18s ease-in-out infinite alternate;
  opacity: 0.12;
}

@keyframes nebulaDrift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.08); }
}

/* Contenu hero */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 var(--space-md);
  max-width: 680px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

/* Trou noir hero */
.hero-blackhole {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: var(--space-md);
  display: grid;
  place-items: center;
}

.blackhole-core {
  width: 62%;
  height: 62%;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #0b0b11 0%, #030306 55%, #000 100%);
  position: relative;
  z-index: 4;
  box-shadow:
    inset 0 0 30px rgba(0, 0, 0, 0.9),
    0 0 20px rgba(0, 0, 0, 0.8);
}

.blackhole-ring {
  position: absolute;
  width: 100%;
  height: 56%;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(132, 150, 255, 0.08),
    rgba(174, 147, 255, 0.62),
    rgba(212, 231, 255, 0.78),
    rgba(140, 164, 255, 0.55),
    rgba(132, 150, 255, 0.08)
  );
  filter: blur(1px);
  transform: rotate(-18deg);
  z-index: 3;
  animation: accretionSpin 8s linear infinite;
}

.blackhole-ring-2 {
  width: 86%;
  height: 42%;
  opacity: 0.45;
  transform: rotate(8deg);
  animation-duration: 11s;
  z-index: 2;
}

.blackhole-glow {
  position: absolute;
  inset: -18px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.2) 0%, rgba(108, 99, 255, 0) 68%);
  filter: blur(10px);
  z-index: 1;
  animation: blackholePulse 4.8s ease-in-out infinite;
}

@keyframes accretionSpin {
  from { transform: rotate(-18deg); }
  to   { transform: rotate(342deg); }
}

@keyframes blackholePulse {
  0%, 100% { opacity: 0.45; transform: scale(1); }
  50%      { opacity: 0.9; transform: scale(1.08); }
}

.hero-eyebrow {
  color: #7c6fff;
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  color: var(--clr-white);
  line-height: 1.1;
  margin-bottom: 4px;
  text-shadow: 0 0 60px rgba(108,99,255,0.4);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(var(--text-base), 2.5vw, var(--text-xl));
  color: rgba(200,200,230,0.7);
  font-weight: 300;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.03em;
}

.hero-description {
  color: rgba(160,165,195,0.8);
  font-size: var(--text-base);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* Flèche de défilement */
.hero-scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.hero-scroll:hover {
  opacity: 1;
}

.scroll-line {
  display: block;
  width: 1.5px;
  height: 50px;
  background: linear-gradient(to bottom, transparent, rgba(200,200,255,0.8));
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: scaleY(1) translateY(0); opacity: 0.5; }
  50%       { transform: scaleY(1.1) translateY(6px); opacity: 1; }
}

/* ============================================
   À PROPOS (aperçu)
   ============================================ */
.about-preview {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--clr-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-text p {
  color: var(--clr-text-muted);
  margin-bottom: var(--space-sm);
  font-size: var(--text-lg);
}

.about-text .link-arrow {
  display: inline-block;
  margin-top: var(--space-sm);
}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.skill-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}

.skill-icon {
  font-size: 1.75rem;
  display: block;
  margin-bottom: var(--space-xs);
}

.skill-card h3 {
  font-size: var(--text-base);
  color: var(--clr-white);
  margin-bottom: 2px;
}

.skill-card p {
  font-size: var(--text-sm);
  color: var(--clr-text-muted);
}

/* ============================================
   PROJETS (aperçu)
   ============================================ */
.projects-preview {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--clr-border);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.project-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.project-thumbnail {
  height: 180px;
  overflow: hidden;
}

.project-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .project-thumbnail img {
  transform: scale(1.05);
}

.placeholder-img {
  background: var(--clr-bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
}

.project-info {
  padding: var(--space-md);
}

.project-title {
  font-size: var(--text-lg);
  color: var(--clr-white);
  margin-bottom: var(--space-xs);
}

.project-desc {
  font-size: var(--text-sm);
  color: var(--clr-text-muted);
  margin-bottom: var(--space-sm);
}

.project-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  background: rgba(108,99,255,0.15);
  color: var(--clr-accent-2);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(108,99,255,0.3);
}

/* ============================================
   CTA CONTACT
   ============================================ */
.contact-cta {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--clr-border);
  text-align: center;
}

.contact-cta h2 {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
}

.contact-cta p {
  color: var(--clr-text-muted);
  font-size: var(--text-lg);
  margin-bottom: var(--space-lg);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  border-top: 1px solid var(--clr-border);
  padding: var(--space-lg) 0;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.site-footer p {
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--clr-accent-2);
}

/* ============================================
   PAGES INTERNES — styles communs
   ============================================ */
.page-hero {
  padding: calc(80px + var(--space-xl)) var(--space-md) var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

.page-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
}

.page-hero p {
  color: var(--clr-text-muted);
  font-size: var(--text-lg);
  max-width: 600px;
}

/* ============================================
   PAGES PROJET — galerie scalable
   ============================================ */
.project-link {
  display: inline-block;
  margin-top: var(--space-sm);
  color: var(--clr-accent-2);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: color var(--transition);
}

.project-link:hover {
  color: var(--clr-white);
}

.project-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

.project-sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}

.project-meta-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: grid;
  gap: var(--space-sm);
}

.project-meta-title {
  font-size: var(--text-sm);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.project-meta-value {
  color: var(--clr-white);
  font-weight: 600;
}

.project-gallery-grid {
  columns: 2;
  column-gap: var(--space-sm);
}

.project-gallery-item {
  break-inside: avoid;
  margin-bottom: var(--space-sm);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--clr-bg-card);
  cursor: zoom-in;
  transition: transform var(--transition), border-color var(--transition);
}

.project-gallery-item:hover {
  transform: translateY(-2px);
  border-color: var(--clr-accent);
}

.project-gallery-item img {
  width: 100%;
  height: auto;
  display: block;
}

.project-gallery-caption {
  padding: 0.65rem 0.8rem;
  font-size: var(--text-sm);
  color: var(--clr-text-muted);
  border-top: 1px solid var(--clr-border);
}

.gallery-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-md);
}

.gallery-lightbox.is-open {
  display: flex;
}

.gallery-lightbox-content {
  position: relative;
  width: min(1200px, 96vw);
  max-height: 92vh;
  display: grid;
  gap: var(--space-sm);
}

.gallery-lightbox-image {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: #06080f;
}

.gallery-lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.gallery-counter,
.gallery-lightbox-caption {
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
}

.gallery-controls {
  display: flex;
  gap: 8px;
}

.gallery-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--clr-border);
  color: var(--clr-white);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.gallery-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--clr-accent);
}

/* ============================================
   ANIMATIONS SCROLL
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .project-sidebar {
    position: static;
  }

  .project-gallery-grid {
    columns: 1;
  }
}

@media (max-width: 600px) {
  .nav-toggle {
    display: flex;
  }

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

  .nav-links.is-open {
    display: flex;
  }

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

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

  .section-title {
    font-size: var(--text-2xl);
  }

  .project-gallery-grid {
    columns: 1;
  }
}