:root {
  --bg: #111111;
  --surface: #171717;
  --line: #2a2a2a;
  --text: #ededed;
  --muted: #8a8a8a;
  --font: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
  --gutter: clamp(1rem, 5vw, 4rem);
  --ease: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--text); color: var(--bg); }
.muted { color: var(--muted); }

.label {
  font: 500 .78rem var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.6rem; border: 1px solid var(--text); cursor: pointer;
  font: 500 .95rem var(--font); color: var(--bg); background: var(--text);
  transition: background .25s, color .25s;
}
.btn:hover { background: transparent; color: var(--text); }
.btn:disabled { opacity: .5; cursor: wait; }
.link { color: var(--muted); border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.link:hover { color: var(--text); border-color: var(--text); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem var(--gutter);
  background: rgba(17, 17, 17, .9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.logo { font: 500 1rem var(--mono); }
.nav-links { display: flex; gap: 2.25rem; }
.nav-links a { color: var(--muted); font-size: .92rem; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .5rem; }
.nav-toggle span { display: block; width: 22px; height: 1.5px; background: var(--text); margin: 6px 0; transition: transform .3s var(--ease); }

/* ---------- Hero ---------- */
.hero {
  max-width: 1200px; margin: 0 auto;
  padding: clamp(4rem, 12vh, 8rem) var(--gutter) clamp(6rem, 14vh, 9rem);
  min-height: calc(100svh - 60px);
  display: flex; flex-direction: column; justify-content: center;
  border-bottom: 1px solid var(--line);
}
h1 {
  font-size: clamp(2.3rem, 6.5vw, 5rem);
  line-height: 1.05; letter-spacing: -.035em; font-weight: 500;
}
h1 .line { display: block; }
.hero-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end;
  gap: 2rem; margin-top: 3.5rem;
}
.lead { color: var(--muted); font-size: 1.08rem; max-width: 480px; }
.hero-cta { display: flex; align-items: center; gap: 1.75rem; flex-wrap: wrap; }

/* ---------- Sections ---------- */
.section {
  max-width: 1200px; margin: 0 auto;
  padding: clamp(4rem, 10vh, 7rem) var(--gutter);
  border-bottom: 1px solid var(--line);
}
.section-head { margin-bottom: 3rem; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 500; letter-spacing: -.025em; line-height: 1.15; }

/* ---------- Services ---------- */
.services { list-style: none; border-top: 1px solid var(--line); }
.service {
  display: grid; grid-template-columns: 4rem 1fr 1.3fr; gap: 1.5rem; align-items: baseline;
  padding: 1.75rem 0; border-bottom: 1px solid var(--line);
  transition: padding-left .4s var(--ease);
}
.service:hover { padding-left: .75rem; }
.num { font: .85rem var(--mono); color: var(--muted); }
.service h3 { font-size: 1.2rem; font-weight: 500; }
.service p { color: var(--muted); }

/* ---------- Langages ---------- */
.langs {
  list-style: none;
  display: grid; grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.langs li {
  padding: 2rem 1.25rem;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font: 500 1.1rem var(--mono);
  transition: background .25s;
}
.langs li:hover { background: var(--surface); }

/* ---------- Steps ---------- */
.steps { list-style: none; counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.steps li { counter-increment: step; border-top: 1px solid var(--text); padding-top: 1.25rem; }
.steps li::before { content: "0" counter(step); font: .85rem var(--mono); color: var(--muted); }
.steps h3 { font-size: 1.15rem; font-weight: 500; margin: .6rem 0 .4rem; }
.steps p { color: var(--muted); font-size: .95rem; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-info > p { margin-bottom: 1rem; }
.contact-item {
  position: relative; display: block;
  padding: 1.1rem 0; border-bottom: 1px solid var(--line);
}
.contact-item small { display: block; font: .75rem var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: .2rem; }
.contact-item strong { font-weight: 500; font-size: 1.1rem; word-break: break-all; }
.copy-hint { position: absolute; right: 0; bottom: 1.2rem; font: .75rem var(--mono); color: var(--muted); opacity: 0; transition: opacity .2s; }
.contact-item:hover .copy-hint { opacity: 1; }

.form { display: flex; flex-direction: column; gap: 1.4rem; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.form label { display: flex; flex-direction: column; gap: .5rem; font-size: .85rem; color: var(--muted); }
.form .field { display: flex; flex-direction: column; gap: .5rem; }
.date-field { position: relative; display: flex; align-items: center; gap: .5rem; border-bottom: 1px solid var(--line); transition: border-color .2s; }
.date-field:focus-within { border-color: var(--text); }
.date-field:has(.invalid) { border-color: #c0504d; }
.date-segments {
  display: flex; align-items: center; gap: .3rem; flex: 1; min-width: 0;
  padding: .45rem 0;
}
.form .date-segments .seg {
  width: 2.4rem; padding: .35rem 0; text-align: center;
  border: 1px solid var(--line); border-radius: 4px;
  font: 1rem var(--mono); background: var(--surface);
}
.form .date-segments .seg:focus { border-color: var(--text); }
.date-segments .seg::placeholder { color: #555; }
.sep { color: var(--muted); font: .95rem var(--mono); }
.sep-word { margin: 0 .15rem; }
.date-btn {
  flex-shrink: 0;
  display: grid; place-items: center; width: 32px; height: 32px;
  background: none; border: 0; color: var(--muted); cursor: pointer; transition: color .2s;
}
.date-btn:hover, .date-btn:focus-visible { color: var(--text); outline: none; }
/* Sélecteur natif caché, placé sous le bouton pour que le calendrier s'ouvre au bon endroit */
.date-picker {
  position: absolute; right: 0; bottom: 0; width: 32px; height: 1px;
  opacity: 0; pointer-events: none; border: 0; padding: 0;
  color-scheme: dark;
}
.hint { font-size: .75rem; color: #666; }
.form input, .form select, .form textarea {
  width: 100%; padding: .75rem 0;
  background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0;
  color: var(--text); font: 1rem var(--font);
  transition: border-color .2s;
}
.form select {
  cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8a8a' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right .25rem center; padding-right: 1.5rem;
}
.form select option { background: var(--surface); color: var(--text); }
.form textarea { resize: vertical; min-height: 130px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--text); }
.form .invalid { border-color: #c0504d !important; }
.form .btn { align-self: flex-start; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { min-height: 1.4em; font-size: .92rem; }
.form-status.ok { color: var(--text); }
.form-status.err { color: #d9706c; }

/* ---------- Footer / toast ---------- */
.footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  max-width: 1200px; margin: 0 auto; padding: 2rem var(--gutter);
  color: var(--muted); font: .85rem var(--mono);
}
.footer a:hover { color: var(--text); }
.toast {
  position: fixed; left: 50%; bottom: 2rem; transform: translate(-50%, 200%);
  padding: .7rem 1.2rem; background: var(--text); color: var(--bg);
  font: .88rem var(--mono); z-index: 100;
  opacity: 0; visibility: hidden;
  transition: transform .4s var(--ease), opacity .3s, visibility .3s;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; visibility: visible; }

/* ---------- Apparition au scroll ----------
   Quand un bloc arrive dans l'écran, script.js lui ajoute .revealed :
   il remonte vers sa place en apparaissant. */

/* Hero : entrée au chargement */
.hero { position: relative; overflow: hidden; }
h1 .line { display: block; overflow: hidden; padding-bottom: .06em; }
h1 .line > span { display: inline-block; }
.js h1 .line > span { animation: line-up 1.2s var(--ease) both; animation-delay: calc(.1s + var(--i) * .13s); }
.js .hero-fade { animation: fade-up 1s var(--ease) both; animation-delay: calc(.35s + var(--i) * .12s); }
@keyframes line-up { from { transform: translateY(110%); } }
@keyframes fade-up { from { opacity: 0; transform: translateY(40px); } }

.scroll-hint {
  position: absolute; left: 50%; bottom: 2rem; width: 1px; height: 48px;
  background: var(--line); overflow: hidden;
}
.scroll-hint span { display: block; width: 100%; height: 50%; background: var(--text); animation: hint 1.8s ease-in-out infinite; }
@keyframes hint { from { transform: translateY(-100%); } to { transform: translateY(200%); } }

/* Blocs : montent de 60px en apparaissant */
.js .reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity .8s ease, transform .9s var(--ease);
  transition-delay: var(--d, 0s);
}
.js .reveal.revealed { opacity: 1; transform: none; }

/* Services et étapes : la ligne se dessine de gauche à droite */
.js .service.reveal { border-bottom-color: transparent; position: relative; }
.js .steps li.reveal { border-top-color: transparent; position: relative; }
.js .service.reveal::after,
.js .steps li.reveal::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px;
  transform: scaleX(0); transform-origin: left;
  transition: transform 1.1s var(--ease);
  transition-delay: calc(var(--d, 0s) + .15s);
}
.js .service.reveal::after { bottom: -1px; background: var(--line); }
.js .steps li.reveal::after { top: -1px; background: var(--text); }
.js .reveal.revealed::after { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  .scroll-hint span { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .service { grid-template-columns: 3rem 1fr; }
  .service p { grid-column: 2; }
  .langs { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 1.25rem; padding: 1.5rem var(--gutter);
    background: var(--bg); border-bottom: 1px solid var(--line);
    opacity: 0; pointer-events: none; transform: translateY(-8px);
    transition: opacity .3s, transform .3s var(--ease);
  }
  .nav.open .nav-links { opacity: 1; pointer-events: auto; transform: none; }
  .nav.open .nav-toggle span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
  .nav.open .nav-toggle span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }
  .langs { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .form .row { grid-template-columns: 1fr; }
}