/* THEME SYSTEM
   - Dark = par défaut
   - Light = quand body.light est présent
*/
:root {
  /* DARK THEME (default) */
  --bg-main: #020518;
  --bg-elevated: rgba(9, 15, 37, 0.9);
  --accent: #00f6ff;
  --accent-soft: #3be4c6;
  --text-main: #f7f9ff;
  --text-muted: #9ca3c7;
  --border-subtle: rgba(148, 163, 184, 0.2);
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --container-width: 1120px;
}

/* LIGHT MODE (optionnel, si un jour tu ajoutes body.light) */
body.light {
  --bg-main: #ffffff;
  --bg-elevated: #f2f4f8;
  --accent: #2563eb;
  --accent-soft: #38bdf8;
  --text-main: #0f172a;
  --text-muted: #475569;
  --border-subtle: rgba(148, 163, 184, 0.25);
  --shadow-soft: 0 18px 35px rgba(15, 23, 42, 0.12);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  scroll-behavior: smooth;
}

/* background grid */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.25;
  z-index: -1;
}

/* layout */
.section {
  max-width: var(--container-width);
  padding: 96px 20px;
  margin: 0 auto;
}

/* navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 14px 20px;
  backdrop-filter: blur(16px);
  /* DARK par défaut */
  background: linear-gradient(
    120deg,
    rgba(15, 23, 42, 0.96),
    rgba(2, 6, 23, 0.96)
  );
  border-bottom: 1px solid var(--border-subtle);
}

/* VERSION CLAIRE de la navbar (si body.light) */
body.light .navbar {
  background: rgba(248, 250, 252, 0.9);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.logo-text {
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--text-muted);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}


.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transition: width 0.2s ease-out;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-subtle);
  padding: 6px 10px;
  border-radius: 12px;
  color: var(--text-main);
  cursor: pointer;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  transition: 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-size: 22px;
}

/* hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 60px;
  align-items: center;
  padding-top: 72px;
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 11px;
  color: var(--accent-soft);
  margin-bottom: 12px;
}

.hero-title {
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.1;
  margin: 0 0 12px;
}

.hero-title .accent {
  background: linear-gradient(120deg, var(--accent), #4f46e5);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 16px;
}

.hero-text {
  margin: 0 0 24px;
  color: var(--text-muted);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.btn {
  border-radius: 999px;
  padding: 10px 20px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent), #4f46e5);
  color: #f9fafb;
  font-weight: 600;
  box-shadow: 0 18px 35px rgba(56, 189, 248, 0.45);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.7); /* sombre par défaut */
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--text-muted);
}

/* Version claire du bouton fantôme */
body.light .btn-ghost {
  background: rgba(241, 245, 249, 0.9);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--text-main);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-socials a {
  color: var(--accent);
  text-decoration: none;
}

/* hero photo */
.hero-photo-wrapper {
  position: relative;
  justify-self: center;
}

.hero-photo-ring {
  width: 260px;
  height: 260px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 0, var(--accent), transparent 60%);
  border: 1px solid rgba(148, 163, 184, 0.4);
  /* Ombre sombre par défaut */
  box-shadow: 0 22px 40px rgba(15, 23, 42, 0.9);
}

/* Éventuelle version plus douce en clair */
body.light .hero-photo-ring {
  box-shadow: 0 22px 40px rgba(15, 23, 42, 0.18);
}

.hero-photo {
  position: absolute;
  inset: 12px;
  width: 236px;
  height: 236px;
  border-radius: 999px;
  object-fit: cover;
  border: 2px solid rgba(15, 23, 42, 0.9);
}

.hero-badge {
  position: absolute;
  font-size: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  /* Sombre par défaut */
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--text-muted);
  backdrop-filter: blur(12px);
}

/* Version claire du badge */
body.light .hero-badge {
  background: rgba(248, 250, 252, 0.96);
}

.hero-badge-top {
  top: -10px;
  right: -6px;
}

.hero-badge-bottom {
  bottom: -6px;
  left: -2px;
}

.hero-badge .dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
  margin-right: 6px;
}

/* section header */
.section-header {
  max-width: 620px;
  margin-bottom: 36px;
}

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 11px;
  color: var(--accent-soft);
  margin: 0 0 8px;
}

.section-title {
  margin: 0 0 10px;
  font-size: 24px;
}

.section-text {
  margin: 0;
  color: var(--text-muted);
}

/* skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.skills-column {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.skills-title {
  margin: 0 0 12px;
  font-size: 15px;
}

.chip-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--text-muted);
}

/* timeline */
.timeline {
  border-left: 1px dashed rgba(148, 163, 184, 0.5);
  margin-left: 10px;
  padding-left: 26px;
  display: grid;
  gap: 28px;
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -38px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 2px solid var(--bg-main);
  background: radial-gradient(circle, var(--accent), #4f46e5);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.7);
}

.timeline-date {
  font-size: 12px;
  color: var(--accent-soft);
}

.timeline-title {
  margin: 4px 0 6px;
  font-size: 16px;
}

.timeline-text {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

/* projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.project-card {
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.06), transparent 55%),
    var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.project-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--accent-soft);
  margin-bottom: 8px;
}

.project-title {
  margin: 0 0 8px;
  font-size: 17px;
}

.project-text {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.project-meta {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  font-size: 12px;
  color: var(--text-muted);
}

.project-meta li + li {
  margin-top: 4px;
}

.project-actions {
  display: flex;
  justify-content: flex-start;
}

.btn-link {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}

.btn-link:hover {
  text-decoration: underline;
}

/* contact */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 26px;
}

.contact-info {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  border: 1px solid var(--border-subtle);
}

.contact-info h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.contact-info ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.contact-info li + li {
  margin-top: 6px;
}

.contact-info a {
  color: var(--accent);
  text-decoration: none;
}

.contact-form {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

/* Inputs : sombre par défaut */
.contact-form input,
.contact-form textarea {
  background: #020617;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-main);
  outline: none;
}

/* Version claire des inputs */
body.light .contact-form input,
body.light .contact-form textarea {
  background: #e5e7eb;
}

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

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
}

.full-width {
  width: 100%;
}

/* footer */
.footer {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 26px 20px 40px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* responsive */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-photo-wrapper {
    order: -1;
  }

  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .navbar {
    padding-inline: 16px;
  }

  .nav-links {
    position: absolute;
    inset: 60px 16px auto;
    flex-direction: column;
    /* sombre par défaut */
    background: rgba(15, 23, 42, 0.98);
    border-radius: 16px;
    padding: 14px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    display: none;
  }

  /* version claire du menu mobile */
  body.light .nav-links {
    background: rgba(248, 250, 252, 0.98);
  }

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

  .nav-toggle {
    display: block;
  }

  .section {
    padding-inline: 16px;
  }

  .hero {
    padding-top: 56px;
  }
}