/* ==========================================================================
   bhorville-it.fr — feuille de style principale
   Design sobre, moderne, responsive. Aucun framework.
   ========================================================================== */

:root {
  /* Couleurs */
  --bg:            #ffffff;
  --bg-alt:        #f7f8fa;
  --surface:       #ffffff;
  --border:        #e6e8ec;
  --border-strong: #d3d7de;

  --text:          #1b1f27;
  --text-soft:     #4b5361;
  --text-mute:     #767f8d;

  --brand:         #0f172a;
  --brand-soft:    #1e293b;
  --accent:        #2563eb;
  --accent-soft:   #eff4ff;

  --ok:            #0f766e;

  /* Typographie */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;

  /* Mesures */
  --container: 1140px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius:    14px;
  --radius-sm: 10px;

  /* Ombres discrètes */
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow-md: 0 8px 24px -12px rgba(16, 24, 40, .18);
  --shadow-lg: 0 24px 48px -24px rgba(16, 24, 40, .28);

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: .25s;

  --header-h: 68px;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.18; letter-spacing: -.02em; font-weight: 650; }
p  { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a  { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: #cfe0ff; color: var(--brand); }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: .6rem 1rem;
  background: var(--brand);
  color: #fff;
  border-radius: 8px;
  font-size: .9rem;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------------------
   En-tête / navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(255, 255, 255, .94);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-weight: 600;
  letter-spacing: -.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.brand-text { font-size: .98rem; }

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: .35rem;
}

.site-nav a {
  display: inline-block;
  padding: .5rem .8rem;
  border-radius: 8px;
  font-size: .93rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.site-nav a:hover { color: var(--text); background: var(--bg-alt); }

.site-nav a.is-active { color: var(--accent); background: var(--accent-soft); }

.nav-cta {
  margin-left: .35rem;
  background: var(--brand) !important;
  color: #fff !important;
  padding-inline: 1rem !important;
}
.nav-cta:hover { background: var(--brand-soft) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1.8px;
  margin-inline: auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  isolation: isolate;
  padding: clamp(4.5rem, 12vw, 8.5rem) 0 clamp(4rem, 10vw, 7rem);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 85% 70% at 50% 30%, #000 35%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 30%, #000 35%, transparent 78%);
}

.hero-inner { max-width: 820px; }

.eyebrow {
  display: inline-block;
  margin-bottom: 1.25rem;
  padding: .38rem .8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .7);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.hero-title {
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -.035em;
  color: var(--brand);
}

.hero-subtitle {
  margin-top: .55rem;
  font-size: clamp(1.15rem, 3vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--accent);
}

.hero-lead {
  margin-top: 1.6rem;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--text-soft);
}
.hero-lead strong { color: var(--text); font-weight: 600; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 2.3rem;
}

/* --------------------------------------------------------------------------
   Boutons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .78rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 550;
  letter-spacing: -.005em;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--brand-soft); box-shadow: var(--shadow-lg); }

.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: var(--bg-alt); border-color: var(--text-mute); }

.btn-lg { padding: .95rem 1.9rem; font-size: 1rem; }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section { padding: clamp(4rem, 9vw, 6.5rem) 0; }
.section-alt { background: var(--bg-alt); }

.section-head { max-width: 720px; margin-bottom: clamp(2.2rem, 5vw, 3.4rem); }

.section-kicker {
  margin-bottom: .8rem;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  letter-spacing: -.03em;
  color: var(--brand);
}

.section-desc {
  margin-top: 1rem;
  font-size: 1.03rem;
  color: var(--text-soft);
}

/* --------------------------------------------------------------------------
   À propos
   -------------------------------------------------------------------------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(1.8rem, 4vw, 3.5rem);
  align-items: start;
}

.about-text p + p { margin-top: 1.1rem; }
.about-text p { color: var(--text-soft); font-size: 1.03rem; }
.about-text strong { color: var(--text); font-weight: 600; }

.about-facts {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .5rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.fact-list li {
  display: flex;
  flex-direction: column;
  gap: .18rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--border);
}
.fact-list li:last-child { border-bottom: 0; }

.fact-label {
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.fact-value { font-weight: 550; color: var(--text); }

/* --------------------------------------------------------------------------
   Cartes compétences
   -------------------------------------------------------------------------- */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 1.1rem;
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem 1.6rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

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

.card-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 1rem;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
}
.card-icon svg { width: 21px; height: 21px; }

.card-title { font-size: 1.06rem; font-weight: 600; margin-bottom: .45rem; }
.card-text  { font-size: .93rem; color: var(--text-soft); line-height: 1.6; }

.card-featured {
  background: linear-gradient(160deg, var(--brand) 0%, #16233c 100%);
  border-color: var(--brand);
}
.card-featured .card-title { color: #fff; }
.card-featured .card-text  { color: #b9c2d0; }
.card-featured .card-icon  { background: rgba(255, 255, 255, .12); color: #fff; }
.card-featured:hover { box-shadow: var(--shadow-lg); }

.card-ghost {
  display: grid;
  place-items: center;
  min-height: 150px;
  background: transparent;
  border-style: dashed;
  border-color: var(--border-strong);
}
.card-ghost:hover { transform: none; box-shadow: none; }
.card-ghost-text {
  font-size: .92rem;
  color: var(--text-mute);
  text-align: center;
  max-width: 22ch;
}

/* --------------------------------------------------------------------------
   Projets
   -------------------------------------------------------------------------- */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
}

.project {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem 1.5rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}

.project-status {
  display: inline-block;
  padding: .28rem .65rem;
  border-radius: 999px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: var(--ok);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.project-index {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--border-strong);
}

.project-title { font-size: 1.22rem; font-weight: 650; margin-bottom: .55rem; }
.project-text  { font-size: .94rem; color: var(--text-soft); flex: 1; }

.project-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: 1.3rem;
  font-size: .92rem;
  font-weight: 550;
  color: var(--accent);
  transition: gap var(--dur) var(--ease), color var(--dur) var(--ease);
}
.project-link:hover { gap: .7rem; }
.project-link.is-disabled { color: var(--text-mute); cursor: default; }
.project-link.is-disabled:hover { gap: .4rem; }

/* --------------------------------------------------------------------------
   Liens
   -------------------------------------------------------------------------- */

.links-list {
  display: grid;
  gap: .8rem;
}

.link-item a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.link-item a:hover {
  transform: translateX(4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.link-name { font-weight: 600; font-size: 1.02rem; }
.link-url  { font-size: .88rem; color: var(--text-mute); font-variant-numeric: tabular-nums; }
.link-arrow {
  color: var(--accent);
  font-size: 1.05rem;
  transition: transform var(--dur) var(--ease);
}
.link-item a:hover .link-arrow { transform: translate(2px, -2px); }

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem;
  box-shadow: var(--shadow-sm);
}

.contact-label {
  display: block;
  margin-bottom: .6rem;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.contact-value {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--accent);
  word-break: break-word;
}
.contact-value:hover { text-decoration: underline; }

.contact-note {
  margin-top: .7rem;
  font-size: .84rem;
  color: var(--text-mute);
}

.contact-social { display: flex; flex-wrap: wrap; gap: .55rem; }
.contact-social a {
  padding: .45rem .85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.contact-social a:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.contact-cta { margin-top: 2.2rem; }

/* --------------------------------------------------------------------------
   Pied de page
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--brand);
  color: #c3cbd8;
  padding: 2.8rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.3rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-weight: 600;
  color: #fff;
  font-size: .95rem;
}
.footer-brand .brand-mark { background: rgba(255, 255, 255, .14); }

.footer-nav { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.footer-nav a { font-size: .9rem; color: #c3cbd8; transition: color var(--dur) var(--ease); }
.footer-nav a:hover { color: #fff; }

.footer-meta { font-size: .85rem; color: #8b95a7; display: flex; gap: .55rem; }
.footer-meta .sep { opacity: .5; }

/* --------------------------------------------------------------------------
   Animations d'apparition
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: .8rem var(--gutter) 1.3rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
  }
  .site-nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: var(--shadow-lg);
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: .2rem;
  }
  .site-nav a {
    padding: .8rem .7rem;
    font-size: 1rem;
    border-radius: 10px;
  }
  .nav-cta { margin-left: 0; margin-top: .5rem; text-align: center; }

  .link-item a {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "name  arrow"
      "url   arrow";
    gap: .2rem 1rem;
  }
  .link-name { grid-area: name; }
  .link-url  { grid-area: url; }
  .link-arrow{ grid-area: arrow; align-self: center; }
}

@media (max-width: 560px) {
  .hero-actions .btn { width: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .cards-grid, .projects-grid { grid-template-columns: 1fr; }
}