/* ===========================
   VARIABLES & RESET
=========================== */
:root {
  --bg: #0d0d0d;
  --bg-alt: #111111;
  --surface: #1a1a1a;
  --border: #2a2a2a;
  --accent: #5b8dff;
  --accent-dim: rgba(91, 141, 255, 0.1);
  --accent-line: rgba(91, 141, 255, 0.2);
  --success: #4ade80;
  --danger: #f87171;
  --text: #e8e8e8;
  --text-muted: #8a8a8a;
  --text-dim: #5a5a5a;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --nav-height: 64px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
  text-rendering: optimizeLegibility;
}

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

ul {
  list-style: none;
}

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

::selection {
  background: var(--accent);
  color: #000;
}

/* ===========================
   UTILITAIRES
=========================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section {
  padding: 100px 0;
}

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

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 60px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--accent);
  color: #000;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius) 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

/* ===========================
   BOUTONS
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  outline: none;
  text-decoration: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(91, 141, 255, 0.4);
}

.btn-primary {
  background: var(--accent);
  color: #06122e;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-full {
  width: 100%;
}

/* ===========================
   NAVIGATION
=========================== */
.nav-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(13, 13, 13, 0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
}

.nav {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.nav-active {
  color: var(--accent);
}

.nav-lang {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-family: 'Fira Code', ui-monospace, monospace;
  letter-spacing: 0.02em;
}

.nav-lang .lang-current {
  color: var(--accent);
  font-weight: 500;
}

.nav-lang .lang-sep {
  color: var(--text-dim);
}

.nav-lang a {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.nav-lang a:hover {
  color: var(--text);
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all var(--transition);
}

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--nav-height);
  padding-bottom: 100px;
  background:
    radial-gradient(ellipse 60% 50% at 50% -10%, rgba(91, 141, 255, 0.09) 0%, transparent 70%),
    var(--bg);
}

.hero-content {
  max-width: 720px;
}

.hero-greeting {
  font-family: 'Fira Code', ui-monospace, monospace;
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 12px;
}

.hero-name {
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 14px;
}

.hero-title {
  font-size: clamp(1.05rem, 3vw, 1.7rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 2.4rem;
  font-family: 'Fira Code', ui-monospace, monospace;
  letter-spacing: -0.01em;
}

.cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-desc strong {
  color: var(--text);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===========================
   À PROPOS
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 60px;
  align-items: start;
}

.about-avatar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}

.avatar-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface);
  border: 3px solid var(--border);
  transition: border-color var(--transition);
}

.avatar-photo:hover {
  border-color: var(--accent);
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 32px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.detail-item {
  display: flex;
  gap: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.detail-label {
  color: var(--text-dim);
  min-width: 110px;
  flex-shrink: 0;
}

.detail-value {
  color: var(--text);
  font-weight: 500;
}

.cv-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.status-available {
  color: var(--success);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.status-available::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: pulse 2s ease infinite;
  flex-shrink: 0;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

/* ===========================
   COMPÉTENCES
=========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.skill-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 16px;
}

.skill-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-family: 'Fira Code', ui-monospace, monospace;
  line-height: 1.6;
  white-space: nowrap;
}

/* ===========================
   MÉTHODE
=========================== */
.method-steps {
  display: flex;
  align-items: stretch;
  gap: 16px;
  margin-top: 48px;
}

.method-step {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.method-step:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.step-num {
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 12px;
}

.step-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.step-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.method-arrow {
  flex: 0 0 auto;
  font-size: 1.4rem;
  color: var(--accent);
  opacity: 0.35;
  align-self: center;
  padding: 0 4px;
}

/* ===========================
   EXPÉRIENCE
=========================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.project-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.project-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.project-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  opacity: 0.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.tag {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.76rem;
  font-family: 'Fira Code', ui-monospace, monospace;
  font-weight: 500;
  line-height: 1.6;
}

.exp-date {
  font-size: 0.76rem;
  font-family: 'Fira Code', ui-monospace, monospace;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
}

.exp-location {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: -6px;
}

/* ===========================
   PARCOURS & FORMATION
=========================== */
.education {
  margin-top: 60px;
}

.edu-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: border-color var(--transition);
}

.edu-card:hover {
  border-color: var(--accent);
}

.edu-year {
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.76rem;
  color: var(--accent);
  white-space: nowrap;
  margin-top: 5px;
}

.edu-card strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 4px;
}

.edu-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.edu-card .edu-note {
  color: var(--text-dim);
  font-style: italic;
  margin-top: 4px;
}

/* ===========================
   CONTACT
=========================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
  word-break: break-word;
}

.contact-link svg {
  flex-shrink: 0;
}

.contact-link:hover {
  color: var(--accent);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 1.2em;
}

/* ===========================
   RETOUR EN HAUT
=========================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #06122e;
  border: none;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  outline: none;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #fff;
}

/* ===========================
   PIED DE PAGE
=========================== */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

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

.footer strong {
  color: var(--text-muted);
  font-weight: 600;
}

.footer-sub {
  margin-top: 6px;
  font-size: 0.78rem;
}

/* ===========================
   ANIMATIONS AU DÉFILEMENT
=========================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 16px 0;
    transform: translateY(-130%);
    transition: transform var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links li a {
    display: block;
    padding: 14px 24px;
    font-size: 1rem;
  }

  .nav-links li.nav-lang {
    padding: 14px 24px 4px;
    margin-top: 8px;
    border-top: 1px solid var(--border);
  }

  .nav-links li.nav-lang a {
    display: inline;
    padding: 0;
    font-size: 0.9rem;
  }

  .nav-burger {
    display: flex;
  }

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

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

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-avatar {
    position: static;
    display: flex;
    justify-content: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .method-steps {
    flex-direction: column;
  }

  .method-arrow {
    transform: rotate(90deg);
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 70px 0;
  }

  .section-title {
    margin-bottom: 40px;
  }

  .hero {
    padding-bottom: 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .skill-card,
  .project-card {
    padding: 24px 20px;
  }

  .skill-tag {
    white-space: normal;
  }

  .detail-item {
    flex-direction: column;
    gap: 2px;
  }

  .edu-card {
    flex-direction: column;
    gap: 8px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}

/* ===========================
   ACCESSIBILITÉ
=========================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===========================
   IMPRESSION
=========================== */
@media print {
  :root {
    --bg: #fff;
    --bg-alt: #fff;
    --surface: #fff;
    --border: #ccc;
    --text: #000;
    --text-muted: #333;
    --text-dim: #666;
    --accent: #1a4fd0;
  }

  .nav-header,
  .back-to-top,
  .contact-form,
  .hero-actions {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .section {
    padding: 30px 0;
    page-break-inside: avoid;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}