/* ==========================================================================
   Zaid — design system "Nocturne"
   Tokens repris de la maquette Claude Design. Modifier les couleurs ici.
   ========================================================================== */

:root {
  --color-bg: #161826;
  --color-surface: #232532;
  --color-text: #e9e9ed;
  --color-accent: #9184d9;
  --color-divider: color-mix(in srgb, #e9e9ed 16%, transparent);

  --color-neutral-100: #f3f5fe;
  --color-neutral-200: #e4e7f5;
  --color-neutral-300: #cfd3e5;
  --color-neutral-400: #b2b6ca;
  --color-neutral-500: #9397ab;
  --color-neutral-600: #75798c;
  --color-neutral-700: #595d6c;
  --color-neutral-800: #3f424d;
  --color-neutral-900: #292b31;

  --color-accent-100: #f5f4ff;
  --color-accent-200: #e7e5fe;
  --color-accent-300: #d2cefd;
  --color-accent-400: #b5abfc;
  --color-accent-500: #968ae0;
  --color-accent-600: #796cbf;
  --color-accent-700: #5d5294;
  --color-accent-800: #423a6a;
  --color-accent-900: #2b2741;

  --color-section: #262a60;
  --color-section-glow: #353b80;

  --color-danger: #ff9b9b;
  --color-success: #9fe3c0;

  --font-heading: "Inter", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-heading-weight: 500;

  --space-1: 2.8px;
  --space-2: 5.6px;
  --space-3: 8.4px;
  --space-4: 11.2px;
  --space-6: 16.8px;
  --space-8: 22.4px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --shadow-sm: 0 0 0 1px #3f424d;
  --shadow-md: 0 0 0 1px #595d6c, 0 6px 18px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 0 0 1px #9397ab, 0 16px 40px rgba(0, 0, 0, 0.65);

  --wrap: 1100px;
  --gutter: clamp(20px, 5vw, 64px);
}

/* --- base ---------------------------------------------------------------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-2);
}

p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--color-accent-700);
  color: var(--color-accent-100);
  border-radius: 0 0 var(--radius-md) 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

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

/* --- navigation ---------------------------------------------------------- */

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--gutter);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
}

.nav-brand {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  font-size: 18px;
  letter-spacing: -0.01em;
  margin-right: auto;
}

.nav a {
  color: inherit;
  text-decoration: none;
  font-size: 14px;
}
.nav a:hover { color: var(--color-accent); }

.nav-actions {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-left: auto;
}

.lang-btn {
  font: 500 12px/1 var(--font-body);
  letter-spacing: 0.06em;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
  color: var(--color-neutral-400);
  border: 1px solid transparent;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}
.lang-btn[aria-pressed="true"] {
  background: color-mix(in srgb, var(--color-accent) 18%, transparent);
  color: var(--color-accent-200);
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
}

.nav .nav-cta { margin-left: 8px; white-space: nowrap; }

#z-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1px;
  width: 0%;
  background: linear-gradient(to right, transparent, var(--color-accent));
  box-shadow: 0 0 10px color-mix(in srgb, var(--color-accent) 55%, transparent);
  transition: width 120ms linear;
}

/* --- buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  font-size: 14px;
  line-height: 1.2;
  color: var(--color-text);
  background: transparent;
  border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--color-accent-700);
  border-color: var(--color-accent-400);
  color: var(--color-accent-100);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-accent) 32%, transparent);
  transition: background 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-500);
  box-shadow: 0 6px 22px color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.btn-lg { padding: 11px 20px; font-size: 15px; white-space: nowrap; }
.btn-lg.btn-primary:hover:not(:disabled) { transform: translateY(-1px); }

.btn-ghost {
  border: 1px solid var(--color-neutral-700);
  color: var(--color-neutral-200);
  transition: border-color 200ms ease, color 200ms ease;
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent-200); }

/* --- section furniture --------------------------------------------------- */

.section { padding-block: 56px; }

.divider-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 44px;
}
.divider-mark .line-fade {
  height: 1px;
  flex: 1;
  background: linear-gradient(to right, transparent, var(--color-neutral-800) 25%, var(--color-neutral-600));
}
.divider-mark .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  flex: none;
  background: var(--color-accent);
  box-shadow: 0 0 14px 3px color-mix(in srgb, var(--color-accent) 40%, transparent);
}
.divider-mark .line-short {
  height: 1px;
  flex: 0 0 clamp(40px, 12vw, 140px);
  background: linear-gradient(to right, var(--color-neutral-600), transparent);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
}
.eyebrow::before {
  content: "";
  width: 44px; height: 1px;
  background: var(--color-accent);
  flex: none;
}
.eyebrow span {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.rule-fade {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(to right, transparent, var(--color-divider) 48px, var(--color-divider) calc(100% - 48px), transparent);
}

/* --- hero ---------------------------------------------------------------- */

/* La bande porte le halo, le contenu vit dans .wrap à l'intérieur. Le halo
   se cale donc sur son parent plutôt que sur 100vw : une largeur en unités
   de fenêtre, combinée à une animation composée, laisse le navigateur
   réafficher l'ancienne taille après un redimensionnement, ce qui découpe
   le dégradé au carré. */
.hero-band { position: relative; }

.hero {
  padding-block: clamp(56px, 9vw, 112px) 64px;
  position: relative;
}
.hero-glow {
  position: absolute;
  top: -80px;
  bottom: -80px;
  left: 0;
  right: 0;
  pointer-events: none;
  background:
    radial-gradient(780px 460px at 72% 26%, color-mix(in srgb, var(--color-accent-600) 62%, transparent), transparent 72%),
    radial-gradient(680px 420px at 14% 96%, color-mix(in srgb, var(--color-accent-800) 65%, transparent), transparent 74%);
  animation: zPulse 16s ease-in-out infinite;
}
.hero h1 {
  font-size: clamp(40px, 6.2vw, 82px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 0 -0.06em;
  position: relative;
  background: linear-gradient(104deg, var(--color-neutral-100) 18%, var(--color-accent-200) 62%, var(--color-accent-400));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero h1 span { display: block; }
.hero-lede {
  font-size: 17px;
  line-height: 1.65;
  max-width: 56ch;
  margin: 28px 0 0;
  position: relative;
}
.hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 28px;
  position: relative;
}

/* --- bande approche ------------------------------------------------------ */

.band {
  background:
    radial-gradient(760px 400px at 12% 130%, color-mix(in srgb, var(--color-accent-700) 55%, transparent), transparent 62%),
    radial-gradient(1000px 480px at 88% -50%, var(--color-section-glow), transparent 66%),
    linear-gradient(160deg, var(--color-section), color-mix(in srgb, var(--color-section) 70%, var(--color-bg)));
  padding: 64px 0;
  position: relative;
  box-shadow:
    inset 0 1px 0 color-mix(in srgb, var(--color-accent) 35%, transparent),
    inset 0 -1px 0 color-mix(in srgb, var(--color-accent) 20%, transparent);
}
/* Trois colonnes, ou une seule. Pas d'état intermédiaire : le nombre de
   colonnes doit basculer au même moment que le style des séparateurs, plus
   bas dans la requête média. Avec `auto-fit`, c'est la largeur disponible qui
   décidait des colonnes et le point de rupture qui décidait des séparateurs.
   Les deux se contredisaient entre 400 et 760 px : deux colonnes côte à côte
   héritaient du trait horizontal prévu pour une colonne unique, et le
   troisième bloc se retrouvait seul sur sa ligne, surmonté d'un trait. */
.band-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.band-item {
  display: grid;
  gap: 12px;
  align-content: start;
}
.band-item + .band-item {
  border-left: 1px solid color-mix(in srgb, var(--color-accent) 28%, transparent);
  padding-left: clamp(20px, 3vw, 44px);
}
.band-num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: color-mix(in srgb, var(--color-accent-200) 80%, transparent);
  font-feature-settings: "tnum" 1;
}
.band-title {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.15;
  margin: 0;
}
.band-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-neutral-200);
  margin: 0;
  max-width: 26ch;
}

/* --- prestations --------------------------------------------------------- */

#prestations { padding-block: 84px 56px; }

.service-row {
  display: grid;
  grid-template-columns: minmax(0, 64px) minmax(0, 320px) minmax(0, 1fr);
  gap: 12px clamp(20px, 4vw, 64px);
  align-items: baseline;
  padding: 28px 0;
}
.service-row + .service-row {
  border-top: 1px solid transparent;
  border-image: linear-gradient(to right, transparent, var(--color-neutral-700) 18%, var(--color-neutral-700) 82%, transparent) 1;
}
.service-num {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 15px;
  color: var(--color-accent);
  margin: 0;
  font-feature-settings: "tnum" 1;
}
.service-row h2 {
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
}
.service-text {
  font-size: 15.5px;
  line-height: 1.7;
  margin: 0;
  max-width: 52ch;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
}

/* --- réalisations -------------------------------------------------------- */

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform 320ms cubic-bezier(.2, .6, .2, 1), box-shadow 320ms ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card--draft {
  border: 1px dashed var(--color-neutral-700);
  background: transparent;
  box-shadow: none;
}
.card--draft:hover { transform: none; box-shadow: none; }
.card-kicker {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0;
}
.card-title {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  font-size: 17px;
  line-height: 1.2;
  margin: 0;
}
/* Titre-lien : souligné qui se déploie au survol de la carte entière, et
   flèche discrète pour signaler que le lien quitte le site. */
.card-title a {
  color: inherit;
  text-decoration: none;
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 280ms cubic-bezier(.2, .6, .2, 1), color 200ms ease;
}
.card-title a::after {
  content: "↗";
  display: inline-block;
  margin-left: 5px;
  font-size: 0.8em;
  color: var(--color-accent);
  opacity: 0.65;
  transition: transform 280ms cubic-bezier(.2, .6, .2, 1), opacity 200ms ease;
}
.card:hover .card-title a,
.card-title a:focus-visible {
  color: var(--color-accent-200);
  background-size: 100% 1px;
}
.card:hover .card-title a::after {
  opacity: 1;
  transform: translate(2px, -2px);
}

.card-body { margin: 0; font-size: 13px; opacity: 0.8; flex: 1; }
.card-meta {
  margin: 0;
  font-size: 11px;
  color: color-mix(in srgb, var(--color-text) 50%, transparent);
}

/* --- méthode ------------------------------------------------------------- */

#methode { padding-block: 72px 56px; }

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 32px clamp(24px, 4vw, 56px);
  background: var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 48px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}
.method-num {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 15px;
  color: var(--color-accent-700);
  margin: 0 0 12px;
  font-feature-settings: "tnum" 1;
}
.method-grid h3 {
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--color-neutral-900);
}
.method-grid p:last-child {
  font-size: 15.5px;
  line-height: 1.7;
  margin: 0;
  color: var(--color-neutral-800);
}

/* --- à propos ------------------------------------------------------------ */

.about {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px clamp(24px, 5vw, 80px);
  align-items: start;
}
.about h2, .contact h2 {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.012em;
  margin: 0;
}
.about .eyebrow { margin-bottom: 28px; }
.about-text p {
  font-size: 15.5px;
  line-height: 1.75;
  margin: 0;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}
.about-text p + p { margin-top: 20px; }

/* --- contact ------------------------------------------------------------- */

.contact { padding-block: 72px; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px clamp(24px, 5vw, 80px);
  align-items: start;
}
.contact-lede {
  font-size: 15.5px;
  line-height: 1.7;
  margin: 20px 0 0;
  max-width: 46ch;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
}
.contact-meta {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}
.contact-meta a { font-size: 15.5px; }
.contact-meta p {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-neutral-400);
  margin: 0;
}

/* --- formulaire ---------------------------------------------------------- */

.contact-form { display: grid; gap: 14px; }

.field > label {
  display: block;
  font-size: 12px;
  margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}

.input {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  font: inherit;
  font-size: 14px;
  color: var(--color-text);
  caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
.input:user-invalid { border-color: var(--color-danger); }
textarea.input {
  min-height: 90px;
  resize: vertical;
  font-family: var(--font-body);
}

/* Piège à bots : hors écran, hors tabulation, invisible pour les lecteurs
   d'écran. Un humain ne peut pas le remplir, un bot naïf le remplit. */
.hp {
  position: absolute !important;
  left: -9999px !important;
  top: -9999px !important;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form-foot {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.form-status {
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0;
  min-height: 1.2em;
}
.form-status[data-state="error"] { color: var(--color-danger); }
.form-status[data-state="ok"] { color: var(--color-success); }
.form-status[data-state="pending"] { color: var(--color-neutral-400); }

.form-legal {
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-neutral-500);
  margin: 0;
}

.cf-turnstile { min-height: 0; }

/* --- footer -------------------------------------------------------------- */

.site-footer {
  padding-block: 40px 56px;
  border-top: 1px solid transparent;
  border-image: linear-gradient(to right, transparent, var(--color-neutral-700) 18%, var(--color-neutral-700) 82%, transparent) 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  justify-content: space-between;
  font-size: 13px;
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.site-footer a { color: inherit; }

/* --- animations ---------------------------------------------------------- */

/* Respiration sur l'opacité seule. Animer aussi l'échelle promeut le halo en
   calque composé, et un calque composé large comme la fenêtre est justement
   ce qui survit à un redimensionnement avec l'ancienne taille. L'écart visuel
   est négligeable à côté de la variation d'opacité. */
@keyframes zPulse {
  0%, 100% { opacity: 0.72; }
  50% { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 640ms cubic-bezier(.2, .6, .2, 1), transform 640ms cubic-bezier(.2, .6, .2, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* --- responsive ---------------------------------------------------------- */

@media (max-width: 900px) {
  .service-row { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 760px) {
  .nav { padding-block: 10px; gap: 8px; }
  .nav > a:not(.btn) { display: none; }
  .band-grid { grid-template-columns: 1fr; }
  .band-item + .band-item {
    border-left: 0;
    padding-left: 0;
    padding-top: 22px;
    border-top: 1px solid color-mix(in srgb, var(--color-accent) 24%, transparent);
  }
  .site-footer { flex-direction: column; }
}

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

/* --- pages de texte (mentions légales, confidentialité) ------------------- */

.prose {
  max-width: 72ch;
  margin: 0 auto;
  padding-block: 64px 96px;
}
.prose h1 {
  font-size: clamp(30px, 4.5vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.prose .updated {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-neutral-500);
  margin: 0 0 48px;
}
.prose h2 {
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 44px 0 14px;
  color: var(--color-accent-200);
}
.prose h2:first-of-type { margin-top: 0; }
.prose p,
.prose li {
  font-size: 15.5px;
  line-height: 1.75;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}
.prose p { margin: 0 0 14px; }
.prose ul { margin: 0 0 14px; padding-left: 20px; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--color-accent); }
.prose a { text-underline-offset: 3px; }
.prose strong { color: var(--color-text); font-weight: 600; }

.prose dl { margin: 0 0 14px; }
.prose dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-neutral-500);
  margin-top: 14px;
}
.prose dd {
  margin: 4px 0 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  text-decoration: none;
  margin-bottom: 40px;
}
.back-link:hover { text-decoration: underline; }