/* ============================================
   Portfolio Antonin Marchand — Thème dark
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  --bg: #0a0a0f;
  --bg-subtle: #0f0f14;
  --surface: #12121a;
  --surface-hover: #1a1a24;
  --surface-card: #16161d;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(6, 182, 212, 0.3);
  --accent: #06b6d4;
  --accent-hover: #22d3ee;
  --accent-soft: rgba(6, 182, 212, 0.12);
  --accent-glow: rgba(6, 182, 212, 0.35);
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --font-heading: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 9999px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border);
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-soft), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(6, 182, 212, 0.06), transparent);
  min-height: 100vh;
}

/* ----- Header ----- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 48px 1fr 48px;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1rem;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: auto;
}

header.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

/* Bouton menu (hamburger) */
.bouton-menu {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.bouton-menu:hover {
  background: var(--surface-hover);
  border-color: var(--border-accent);
}

.bouton-menu-barre {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

body.nav-open .bouton-menu-barre:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.nav-open .bouton-menu-barre:nth-child(2) {
  opacity: 0;
}

body.nav-open .bouton-menu-barre:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Titre centré */
header h1 {
  grid-column: 2;
  justify-self: center;
  margin: 0;
  padding: 0;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
}

header h1 a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}

header h1 a:hover {
  color: var(--accent);
}

/* Panneau nav (ouvert par le bouton menu, à gauche comme le bouton) */
header nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  max-width: 85vw;
  height: 100vh;
  padding: 5rem 1.5rem 2rem;
  background: var(--surface);
  border-right: 1px solid var(--border);
  box-shadow: 8px 0 32px rgba(0, 0, 0, 0.3);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  z-index: 101;
}

body.nav-open header nav {
  transform: translateX(0);
}

body.nav-open header nav[aria-hidden="false"] {
  visibility: visible;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 99;
}

body.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
}

/* Sans JS : menu toujours visible, pas de panneau */
html.no-js .bouton-menu {
  display: none;
}

html.no-js header {
  grid-template-columns: 1fr auto;
}

html.no-js header h1 {
  grid-column: 1;
  justify-self: start;
}

html.no-js header nav {
  position: static;
  width: auto;
  height: auto;
  max-width: none;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  transform: none;
  overflow-y: visible;
}

html.no-js .nav-overlay {
  display: none;
}

html.no-js nav ul {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.35rem;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

nav li {
  float: none;
}

nav a {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: color var(--transition), background var(--transition);
  border: 1px solid transparent;
}

nav a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

nav a.actif {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border-accent);
}

/* ----- Animation d'entrée (révélation au scroll) ----- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ----- Sections ----- */
section {
  margin: 1.25rem auto;
  padding: 2rem 1.75rem;
  max-width: 720px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

/* Révélation au scroll (activée par JS) */
body.js-ready section:not(.bouton-remonte-section) {
  opacity: 0;
  transform: translateY(20px);
}

body.js-ready section.in-view {
  animation: fadeInUp 0.6s ease forwards;
}

/* Délais pour effet en cascade quand plusieurs sections entrent en vue */
section.in-view:nth-of-type(1) { animation-delay: 0s; }
section.in-view:nth-of-type(2) { animation-delay: 0.06s; }
section.in-view:nth-of-type(3) { animation-delay: 0.12s; }
section.in-view:nth-of-type(4) { animation-delay: 0.18s; }
section.in-view:nth-of-type(5) { animation-delay: 0.24s; }
section.in-view:nth-of-type(6) { animation-delay: 0.3s; }
section.in-view:nth-of-type(7) { animation-delay: 0.36s; }
section.in-view:nth-of-type(8) { animation-delay: 0.42s; }
section.in-view:nth-of-type(9) { animation-delay: 0.48s; }
section.in-view:nth-of-type(10) { animation-delay: 0.54s; }
section.in-view:nth-of-type(n+11) { animation-delay: 0.6s; }

section:hover {
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-hover);
}

section#premier {
  padding-top: 2rem;
  margin-top: 5.5rem;
}

section#premier h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  margin: 0 0 1rem 0;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.25rem 0 0.5rem 0;
}

h3:first-child {
  margin-top: 0;
}

p {
  margin: 0 0 1rem 0;
  color: var(--text-muted);
}

p:last-child {
  margin-bottom: 0;
}

section ul {
  color: var(--text-muted);
  margin: 0 0 1rem 0;
  padding-left: 1.35rem;
}

section li {
  margin-bottom: 0.5rem;
}

section li::marker {
  color: var(--accent);
}

/* ----- Liens ----- */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
  border-bottom: 1px solid transparent;
}

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

/* ----- Boutons bas de page (remonter + page suivante) ----- */
/* Pas de carte visible : juste les boutons quand ils apparaissent au scroll */
.bouton-remonte-section {
  max-width: 720px;
  margin: 2rem auto 4rem auto;
  padding: 0 1rem;
  background: transparent;
  border: none;
  box-shadow: none;
}

.bouton-remonte-section:hover {
  box-shadow: none;
  transform: none;
}

.boutons-bas {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
}

.bouton-remonte,
.bouton-page-suivante {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  transition: opacity 0.3s ease, background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.bouton-remonte {
  background: var(--accent);
  color: var(--bg) !important;
  border-bottom: none !important;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.bouton-page-suivante {
  background: var(--surface);
  color: var(--accent) !important;
  border: 1px solid var(--border-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Cachés par défaut, affichés au scroll (JS ajoute .bouton-remonte-visible) */
body.js-ready .bouton-remonte-section .bouton-remonte,
body.js-ready .bouton-remonte-section .bouton-page-suivante {
  opacity: 0;
  pointer-events: none;
}

body.js-ready .bouton-remonte-section.bouton-remonte-visible .bouton-remonte,
body.js-ready .bouton-remonte-section.bouton-remonte-visible .bouton-page-suivante {
  opacity: 1;
  pointer-events: auto;
}

.bouton-remonte:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

.bouton-page-suivante:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

/* ----- Menu dépliant (tech.html) ----- */
.menu-depliant {
  margin: 1.5rem auto 0 auto;
  max-width: 100%;
}

.menu-depliant > * {
  margin-bottom: 0.75rem;
}

.menu-depliant-element {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}

.menu-depliant-element:hover {
  border-color: rgba(255, 255, 255, 0.1);
}

.menu-depliant-element summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-family: var(--font-heading);
  list-style: none;
  cursor: pointer;
  color: var(--text);
  transition: color var(--transition), background var(--transition);
}

.menu-depliant-element summary:hover {
  color: var(--accent);
}

.menu-depliant-element summary::after {
  content: " ↓";
  float: right;
  color: var(--accent);
  font-size: 0.9em;
}

.menu-depliant-element[open] summary::after {
  content: " ↑";
}

.menu-depliant-contenu {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
  text-align: center;
  margin: 0 auto;
}

.menu-depliant-contenu ul,
.menu-depliant-contenu p {
  margin: 0 0 0.75rem 0;
  text-align: left;
}

.menu-depliant-contenu ul {
  list-style-position: inside;
  padding: 0;
  display: inline-block;
}

.titre-maquette {
  text-align: center;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.contenu-centre,
.contenu-centre-marge {
  text-align: center;
}

.contenu-centre-marge {
  margin-top: 1rem;
}

.image-adaptable {
  max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.diagramme {
  margin-top: 1rem;
}

.schema-interactif {
  width: 100%;
  max-width: 1050px;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

.zone-cliquable {
  fill: transparent;
  cursor: pointer;
  outline: none;
  transition: fill 0.2s ease;
}

.zone-cliquable:hover {
  fill: rgba(6, 182, 212, 0.08);
}

/* ----- Médias ----- */
video {
  display: block;
  width: 100%;
  max-width: 560px;
  max-height: 360px;
  border-radius: var(--radius);
  margin: 1rem auto;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.photo-profil {
  display: block;
  width: 160px;
  height: 160px;
  margin: 1.5rem auto;
  border-radius: 50%;
  border: 3px solid var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  object-fit: cover;
}

.titre-cache {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ----- Footer ----- */
footer {
  position: static;
  width: 100%;
  margin-top: 2rem;
  padding: 1.5rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

footer p {
  margin: 0.4rem 0;
}

footer .footer-sep {
  color: var(--text-dim);
  margin: 0 0.4rem;
  pointer-events: none;
}

footer a {
  color: var(--text-muted);
}

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

/* Page Contact : liste des coordonnées */
.contact-liste {
  list-style: none;
  padding-left: 0;
}

.contact-liste li {
  margin: 0.6rem 0;
}

/* ----- Liens rapides accueil ----- */
.liens-rapides .separateur {
  color: var(--text-dim);
  margin: 0 0.35rem;
  pointer-events: none;
}

/* Indice pour inviter à défiler (page Projets) */
.indice-defiler {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  text-align: center;
  font-size: 0.95rem;
}

.liens-rapides a {
  font-weight: 500;
}

/* ========== Responsive ========== */

body.nav-open {
  overflow: hidden;
}

@media screen and (max-width: 1024px) {
  header h1 {
    font-size: 1.15rem;
  }

  section {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  section#premier {
    margin-top: 5.5rem;
  }
}

@media screen and (min-width: 1025px) {
  body {
    padding-left: 0;
  }

  section {
    margin-left: auto;
    margin-right: auto;
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }

  section#premier {
    margin-top: 6rem;
  }
}

@media screen and (max-width: 780px) {
  body {
    padding-bottom: 100px;
  }

  header {
    padding: 0.75rem 0.5rem;
  }

  header h1 {
    font-size: 1.05rem;
  }

  .bouton-menu {
    width: 40px;
    height: 40px;
  }

  nav a {
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
  }

  section {
    margin: 1rem 0.75rem;
    padding: 1.5rem 1.25rem;
  }

  section#premier {
    margin-top: 5.5rem;
    padding-top: 1.5rem;
  }

  section#premier h2 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  footer {
    position: static;
    padding: 1.5rem 1rem;
  }

  body {
    padding-bottom: 0;
  }

  .bouton-remonte-section {
    margin-bottom: 2rem;
  }

  .photo-profil {
    width: 140px;
    height: 140px;
  }
}

@media screen and (orientation: landscape) and (max-height: 500px) {
  header {
    position: static;
  }

  footer {
    position: static;
  }

  section#premier {
    margin-top: 1.5rem;
  }
}