/* =========================================================================
   BMMConnection
   Feuille de style principale
   Palette : noir intense & or
   Signature : le contour doré (liseret fin)
   ========================================================================= */

/* ---------- 1. Tokens / variables ---------- */
:root {
  /* Couleurs */
  --ink:        #0b0b0c;   /* fond principal, noir intense */
  --ink-2:      #131316;   /* surfaces / panneaux */
  --ink-3:      #1c1c20;   /* bordures discrètes */
  --line:       rgba(216, 178, 90, 0.22); /* filet doré fin */
  --line-soft:  rgba(244, 240, 232, 0.10);
  --gold:       #d8b25a;   /* or principal (logo) */
  --gold-bright:#e7c87c;   /* or clair, surbrillance */
  --gold-deep:  #b8923f;   /* or profond */
  --ivory:      #f4f0e8;   /* texte principal */
  --sand:       #a9986f;   /* texte secondaire / sourdine */
  --sand-dim:   #6f6450;   /* texte très discret */

  /* Typographie */
  --font-display: 'Jost', system-ui, sans-serif;
  --font-accent:  'Cormorant Garamond', Georgia, serif;
  --font-body:    'Jost', system-ui, sans-serif;

  /* Échelle fluide */
  --step--1: clamp(0.78rem, 0.74rem + 0.2vw, 0.88rem);
  --step-0:  clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  --step-1:  clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem);
  --step-2:  clamp(1.5rem, 1.25rem + 1.2vw, 2.1rem);
  --step-3:  clamp(2rem, 1.5rem + 2.4vw, 3.2rem);
  --step-4:  clamp(2.6rem, 1.7rem + 4.4vw, 5rem);

  /* Mesures */
  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 2px;
  --ease: cubic-bezier(0.16, 0.84, 0.44, 1);
}

/* ---------- 2. Reset léger ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ivory);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
ul { list-style: none; padding: 0; }

/* Accessibilité : focus visible */
:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
  border-radius: 1px;
}
.skip-link {
  position: absolute; left: 50%; top: -100px; transform: translateX(-50%);
  background: var(--gold); color: var(--ink); padding: 0.6rem 1.2rem;
  font-size: var(--step--1); letter-spacing: 0.08em; text-transform: uppercase;
  z-index: 200; transition: top 0.25s var(--ease);
}
.skip-link:focus { top: 0.6rem; }

/* ---------- 3. Utilitaires ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(4.5rem, 10vw, 8.5rem); position: relative; }
.section--tight { padding-block: clamp(3rem, 7vw, 5.5rem); }

.eyebrow {
  font-size: var(--step--1);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}
.eyebrow::before {
  content: "";
  width: 1.8rem; height: 1px;
  background: var(--gold);
  display: inline-block;
}

.heading {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.heading--xl { font-size: var(--step-4); letter-spacing: 0.04em; }
.heading--lg { font-size: var(--step-3); }
.heading--md { font-size: var(--step-2); }

.accent {
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--gold);
}

.lead { font-size: var(--step-1); color: var(--sand); font-weight: 300; max-width: 56ch; }
.muted { color: var(--sand); }

/* Boutons */
.btn {
  --bg: transparent;
  --fg: var(--ivory);
  --bd: var(--gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.9rem;
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
  z-index: -1;
}
.btn:hover { color: var(--ink); border-color: var(--gold); }
.btn:hover::after { transform: scaleX(1); }
.btn span, .btn { position: relative; z-index: 1; }

.btn--solid { --bg: var(--gold); --fg: var(--ink); --bd: var(--gold); }
.btn--solid::after { background: var(--gold-bright); }
.btn--solid:hover { color: var(--ink); }

.btn--ghost { --bd: var(--line); }
.btn--ghost:hover { color: var(--ink); }

/* Filet doré décoratif */
.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- 4. Apparition au défilement ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 5. En-tête / navigation ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding-block: 1.4rem;
  background: transparent;
  transition: background 0.4s var(--ease), padding 0.4s var(--ease),
              border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(11, 11, 12, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand__mark { width: 65px; height: auto; flex: none; border-radius: 8px; box-shadow: 0 4px 12px rgba(216, 178, 90, 0.2); border: 1px solid rgba(216, 178, 90, 0.3); }
.brand__name {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 1.02rem;
}
.brand__name b { color: var(--gold); font-weight: 600; }

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1.2rem, 2.4vw, 2.4rem);
}
.nav__link {
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ivory);
  position: relative;
  padding-block: 0.4rem;
}
.nav__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav__link.is-active { color: var(--gold); }

.nav__cta { display: inline-flex; }

/* Bouton hamburger */
.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  background: none; border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 1.5px;
  background: var(--ivory);
  transform: translate(-50%, -50%);
  transition: transform 0.35s var(--ease), opacity 0.2s var(--ease);
}
.nav__toggle span::before { transform: translate(-50%, -7px); }
.nav__toggle span::after  { transform: translate(-50%, 7px); }
.nav__toggle.is-open span { background: transparent; }
.nav__toggle.is-open span::before { transform: translate(-50%, 0) rotate(45deg); }
.nav__toggle.is-open span::after  { transform: translate(-50%, 0) rotate(-45deg); }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 78% 30%, rgba(216,178,90,0.10), transparent 55%),
    radial-gradient(90% 80% at 15% 90%, rgba(216,178,90,0.05), transparent 60%),
    var(--ink);
  z-index: -2;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}
.hero__content { max-width: 40ch; }
.hero__title {
  font-size: var(--step-4);
  margin-block: 1.4rem 0.4rem;
}
.hero__title .accent { display: block; font-size: 0.62em; margin-top: 0.3rem; }
.hero__lead { margin-block: 1.6rem 2.4rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* Anneau-globe (signature, placeholder du futur logo) */
.hero__visual {
  display: grid;
  place-items: center;
  position: relative;
  aspect-ratio: 1;
}
.globe { width: min(100%, 420px); height: auto; }
.globe__ring { animation: spin 60s linear infinite; transform-origin: center; }
.globe__ring--rev { animation: spin 90s linear infinite reverse; transform-origin: center; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .globe__ring, .globe__ring--rev { animation: none; }
}

.scroll-hint {
  position: absolute;
  left: var(--gutter); bottom: 2rem;
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sand);
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}
.scroll-hint::after {
  content: ""; width: 46px; height: 1px; background: var(--gold);
  animation: slide 2.4s var(--ease) infinite;
}
@keyframes slide { 0%,100% { opacity: 0.3; transform: scaleX(0.4); transform-origin:left;} 50% { opacity: 1; transform: scaleX(1); transform-origin:left;} }

/* ---------- 7. En-tête de section ---------- */
.section__head { max-width: 60ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__head .heading { margin-top: 1rem; }
.section__head .lead { margin-top: 1.2rem; }

/* ---------- 8. Services ---------- */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.service {
  background: var(--ink);
  padding: clamp(2rem, 3.5vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background 0.4s var(--ease);
  position: relative;
}
.service:hover { background: var(--ink-2); }
.service__index {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 1.6rem;
  color: var(--gold-deep);
}
.service__title {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--step-1);
}
.service__desc { color: var(--sand); font-size: var(--step-0); }
.service__tags {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-top: auto; padding-top: 1.2rem;
}
.service__tags li {
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--ivory);
  border: 1px solid var(--line);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

/* ---------- 9. Approche ---------- */
.approach__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.pillar {
  border-top: 1px solid var(--gold);
  padding-top: 1.4rem;
}
.pillar__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 400;
  font-size: var(--step-1);
  margin-bottom: 0.6rem;
}
.pillar__text { color: var(--sand); font-size: var(--step-0); }

/* ---------- 10. Processus ---------- */
.process { display: grid; gap: 0; }
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-block: clamp(1.8rem, 3.5vw, 2.8rem);
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step__num {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.4rem, 5vw, 4rem);
  color: var(--gold);
  line-height: 1;
  letter-spacing: 0.02em;
}
.step__body { max-width: 60ch; }
.step__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 400;
  font-size: var(--step-1);
  margin-bottom: 0.5rem;
}
.step__text { color: var(--sand); }

/* ---------- 11. À propos ---------- */
.about {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.about__panel {
  border: 1px solid var(--line);
  padding: clamp(2rem, 4vw, 3.5rem);
  background:
    linear-gradient(160deg, rgba(216,178,90,0.06), transparent 60%),
    var(--ink-2);
}
.about__mark { width: 160px; height: auto; margin-bottom: 2rem; border-radius: 12px; box-shadow: 0 8px 24px rgba(216, 178, 90, 0.15); border: 1px solid rgba(216, 178, 90, 0.2); }
.about__panel p + p { margin-top: 1rem; }
.about__signature {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: var(--step-1);
  color: var(--gold);
  margin-top: 1.5rem;
}
.about__body .heading { margin: 1rem 0 1.4rem; }
.about__body p { color: var(--sand); }
.about__body p + p { margin-top: 1rem; }

/* ---------- 12. Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4.5rem);
}
.contact__aside .heading { margin: 1rem 0 1.4rem; }
.contact__list { margin-top: 2.5rem; display: grid; gap: 1.5rem; }
.contact__item { display: grid; gap: 0.25rem; }
.contact__item dt {
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}
.contact__item dd { color: var(--ivory); font-size: var(--step-1); font-weight: 300; }

.form {
  border: 1px solid var(--line);
  padding: clamp(1.6rem, 3.5vw, 2.8rem);
  background: var(--ink-2);
  display: grid;
  gap: 1.4rem;
}
.field { display: grid; gap: 0.5rem; }
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 540px) { .field--row { grid-template-columns: 1fr; } }
.field label {
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sand);
}
.field label .req { color: var(--gold); }
.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--ink);
  border: 1px solid var(--ink-3);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  color: var(--ivory);
  font-size: var(--step-0);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.field textarea { resize: vertical; min-height: 130px; }
.field select { appearance: none; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--gold) 50%),
                    linear-gradient(135deg, var(--gold) 50%, transparent 50%);
  background-position: calc(100% - 20px) center, calc(100% - 14px) center;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: var(--ink-2);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--sand-dim); }

.field.has-error input,
.field.has-error select,
.field.has-error textarea { border-color: #c2614f; }
.field__error {
  font-size: var(--step--1);
  color: #d98b7a;
  letter-spacing: 0.02em;
  min-height: 0;
  display: none;
}
.field.has-error .field__error { display: block; }

.form__submit { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; }
.form__note { font-size: var(--step--1); color: var(--sand-dim); }

.form__feedback {
  border: 1px solid var(--gold);
  background: rgba(216,178,90,0.08);
  padding: 1rem 1.2rem;
  font-size: var(--step-0);
  color: var(--ivory);
  display: none;
}
.form__feedback.is-shown { display: block; }
.form__feedback b { color: var(--gold); }

/* ---------- 13. Pied de page ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
  background: var(--ink);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.footer__brand .brand { margin-bottom: 1rem; }
.footer__tagline { color: var(--sand); max-width: 42ch; }
.footer__nav { display: flex; flex-wrap: wrap; gap: 0.8rem 2rem; justify-content: flex-end; }
.footer__nav a {
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ivory);
  transition: color 0.3s var(--ease);
}
.footer__nav a:hover { color: var(--gold); }
.footer__bottom {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-soft);
  display: flex; flex-wrap: wrap; gap: 1rem;
  justify-content: space-between; align-items: center;
}
.footer__bottom small { color: var(--sand-dim); font-size: var(--step--1); letter-spacing: 0.04em; }

/* ---------- 14. Responsive ---------- */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero__visual { order: -1; max-width: 320px; margin-inline: auto; }
  .about { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .footer__nav { justify-content: flex-start; }
}

@media (max-width: 760px) {
  .nav__toggle { display: inline-flex; }
  .nav__cta { display: none; }
  .nav__links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(80vw, 340px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.8rem;
    padding: 2rem var(--gutter);
    background: var(--ink-2);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.45s var(--ease);
    z-index: 90;
  }
  .nav__links.is-open { transform: translateX(0); }
  .nav__link { font-size: var(--step-1); }
  .nav__links .btn { margin-top: 0.5rem; }
  .nav__links .nav__cta { display: inline-flex; }
  .nav-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.55);
    opacity: 0; visibility: hidden;
    transition: opacity 0.4s var(--ease), visibility 0.4s var(--ease);
    z-index: 80;
  }
  .nav-backdrop.is-open { opacity: 1; visibility: visible; }
}

@media (max-width: 480px) {
  .step { grid-template-columns: 1fr; gap: 0.6rem; }
  .hero { min-height: auto; padding-block: 8rem 4rem; }
}