/* ==========================================================
   BAM — Landing Ateliers Cowork
   Charte graphique stricte : noir, anthracite, gris signal, blanc
   Typo : Playfair Display (titres) + Open Sans (corps)
   ========================================================== */

:root {
  --noir: #000000;
  --anthracite: #1F1F1F;
  --gris: #6B6B6B;
  --gris-clair: #E5E5E5;
  --blanc: #FFFFFF;

  --max-width: 1200px;
  --pad-x: clamp(20px, 5vw, 80px);
  --section-y: clamp(40px, 5vw, 72px);

  --font-titre: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-corps: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-corps);
  font-size: 17px;
  line-height: 1.6;
  color: var(--anthracite);
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

/* Headings ---------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-titre);
  color: var(--noir);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 700;
  margin-bottom: 32px;
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
  margin-bottom: 24px;
}

h3 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 500;
  margin-bottom: 16px;
}

p {
  margin-bottom: 16px;
}

p.lead {
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
  color: var(--anthracite);
  max-width: 800px;
  margin-bottom: 32px;
}

/* Layout ------------------------------------------------ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section {
  padding: var(--section-y) 0;
  border-top: 1px solid var(--gris-clair);
  scroll-margin-top: 100px;
}

.section.dark {
  background: var(--noir);
  color: var(--blanc);
  border-top: none;
}

.section.dark h1,
.section.dark h2,
.section.dark h3 {
  color: var(--blanc);
}

.section.dark p {
  color: var(--gris-clair);
}

.section.dark .lead {
  color: var(--blanc);
}

/* Eyebrow + point signature ---------------------------- */

.eyebrow {
  font-family: var(--font-corps);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gris);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.dark .eyebrow {
  color: var(--gris-clair);
}

.point {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--noir);
  flex-shrink: 0;
}

.dark .point {
  background: var(--blanc);
}

/* HEADER ----------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--blanc);
  border-bottom: 1px solid var(--gris-clair);
  will-change: auto;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  height: 240px;
  transition: height 0.3s ease;
}

.logo {
  height: 200px;
  width: auto;
  transition: height 0.3s ease;
}

@media (max-width: 600px) {
  .logo {
    height: 120px;
  }
}

/* État "scrolled" : header compact */
.site-header.scrolled .header-inner {
  height: 80px;
}
.site-header.scrolled .logo {
  height: 56px;
}
@media (max-width: 600px) {
  .site-header.scrolled .logo {
    height: 44px;
  }
}

.logo-link {
  display: flex;
  align-items: center;
}

.header-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  margin-left: auto;
  margin-right: 16px;
  white-space: nowrap;
}

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--anthracite);
  letter-spacing: 0.02em;
  text-decoration: none;
  position: relative;
  padding: 4px 0;
}

.header-nav a:hover {
  color: var(--noir);
  text-decoration: none;
}

.header-nav a:hover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--noir);
}

.header-cta {
  font-size: 14px;
  font-weight: 600;
  padding: 14px 28px;
  background: var(--noir);
  color: var(--blanc);
  border: 1px solid var(--noir);
  letter-spacing: 0.04em;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.header-cta:hover {
  background: var(--blanc);
  color: var(--noir);
  text-decoration: none;
}

/* Burger mobile (caché desktop) */
.header-burger {
  display: none;
  background: transparent;
  border: none;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.header-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--noir);
  transition: transform 0.2s, opacity 0.2s;
}

/* Mobile : menu burger */
@media (max-width: 900px) {
  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--blanc);
    border-bottom: 1px solid var(--gris-clair);
    padding: 24px var(--pad-x);
    gap: 16px;
    align-items: flex-start;
    margin: 0;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s, opacity 0.2s;
  }
  .site-header.nav-open .header-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .header-burger {
    display: flex;
  }
  .header-cta {
    padding: 10px 16px;
    font-size: 13px;
  }
}

/* HERO ------------------------------------------------- */

.hero {
  padding: clamp(40px, 6vw, 80px) 0 clamp(40px, 5vw, 72px);
  border-top: none;
}

.hero h1 {
  margin-bottom: 32px;
  max-width: 950px;
}

.hero-sub {
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
  max-width: 720px;
  color: var(--anthracite);
  margin-bottom: 24px;
}

.hero-sub-meta {
  display: inline-block;
  margin-top: 8px;
  color: var(--anthracite);
}

.hero-launch {
  font-style: italic;
  color: var(--gris);
  font-weight: 400;
}

.hero-explainer {
  font-size: 15px;
  line-height: 1.5;
  max-width: 700px;
  color: var(--gris);
  margin-bottom: 48px;
  padding-left: 16px;
  border-left: 2px solid var(--gris-clair);
}

/* CTA -------------------------------------------------- */

.cta {
  display: inline-block;
  font-family: var(--font-corps);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 18px 36px;
  background: var(--noir);
  color: var(--blanc);
  border: 1px solid var(--noir);
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
}

.cta:hover {
  background: var(--blanc);
  color: var(--noir);
  text-decoration: none;
}

.cta-light {
  background: var(--blanc);
  color: var(--noir);
  border-color: var(--blanc);
}

.cta-light:hover {
  background: transparent;
  color: var(--blanc);
  border-color: var(--blanc);
}

/* POUR QUI : two columns ------------------------------- */

.two-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 32px;
}

@media (max-width: 720px) {
  .two-cols {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.check-list {
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 14px;
  line-height: 1.55;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--noir);
}

/* Bullets en noir pour les deux listes (le titre suffit à distinguer "pour vous" / "pas pour vous") */

/* PROMESSE --------------------------------------------- */

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin: 48px 0;
}

@media (max-width: 900px) {
  .promise-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.promise-block h3 {
  color: var(--blanc);
  margin-bottom: 12px;
}

.promise-block p {
  color: var(--gris-clair);
}

.reframe {
  font-family: var(--font-titre);
  font-size: clamp(22px, 2.4vw, 30px);
  font-style: italic;
  font-weight: 500;
  color: var(--blanc);
  border-left: 2px solid var(--blanc);
  padding-left: 24px;
  margin-top: 48px;
  line-height: 1.4;
  max-width: 800px;
}

/* PROGRAMME -------------------------------------------- */

.programme {
  display: grid;
  gap: 0;
  margin-top: 32px;
}

.atelier {
  padding: 24px 0;
  border-top: 1px solid var(--gris-clair);
}

.atelier:last-child {
  border-bottom: 1px solid var(--gris-clair);
}

.atelier-meta {
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 16px;
}

.atelier-num {
  font-family: var(--font-titre);
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 700;
  color: var(--noir);
  line-height: 1;
}

.atelier-mode {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gris);
}

.atelier h3 {
  font-size: clamp(24px, 2.8vw, 32px);
  margin-bottom: 16px;
  font-weight: 700;
}

.atelier p {
  max-width: 800px;
  color: var(--anthracite);
}

/* MODALITES -------------------------------------------- */

.modalites {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 32px;
  margin-bottom: 64px;
}

@media (max-width: 720px) {
  .modalites {
    grid-template-columns: 1fr;
  }
}

.modalites > div {
  padding: 28px 0;
  border-top: 1px solid var(--gris-clair);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modalites > div:nth-child(odd) {
  padding-right: 24px;
}

.modalites > div:nth-child(even) {
  padding-left: 24px;
  border-left: 1px solid var(--gris-clair);
}

@media (max-width: 720px) {
  .modalites > div:nth-child(odd),
  .modalites > div:nth-child(even) {
    padding-left: 0;
    padding-right: 0;
    border-left: none;
  }
}

.modalites dt {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gris);
}

.modalites dd {
  font-size: 17px;
  color: var(--anthracite);
}

.prerequis {
  padding: 32px 0;
  border-top: 1px solid var(--gris-clair);
  margin-top: 16px;
}

.prerequis h3 {
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 20px;
}

.prerequis ul {
  list-style: none;
  margin-bottom: 24px;
}

.prerequis ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}

.prerequis ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--noir);
}

.prerequis .note {
  font-size: 14px;
  color: var(--gris);
  font-style: italic;
  max-width: 720px;
}

/* QUI JE SUIS / BIO ------------------------------------ */

.bio {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 720px) {
  .bio {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .bio-photo {
    max-width: 200px;
  }
}

.bio-photo {
  width: 100%;
}

.photo-placeholder {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--gris-clair);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 13px;
  color: var(--gris);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.photo-julie {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.05);
  display: block;
}

.bio-text p {
  margin-bottom: 20px;
  font-size: 17px;
  line-height: 1.65;
  color: var(--anthracite);
}

.bio-text .bio-loc {
  font-style: italic;
  color: var(--gris);
  margin-top: 24px;
}

/* FAQ -------------------------------------------------- */

.faq {
  margin-top: 32px;
  max-width: 900px;
}

.faq details {
  border-top: 1px solid var(--gris-clair);
  padding: 24px 0;
}

.faq details:last-child {
  border-bottom: 1px solid var(--gris-clair);
}

.faq summary {
  font-family: var(--font-titre);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 500;
  cursor: pointer;
  padding-right: 32px;
  position: relative;
  list-style: none;
  color: var(--noir);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-corps);
  font-weight: 300;
  font-size: 28px;
  line-height: 1;
  color: var(--noir);
  transition: transform 0.2s;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  padding-top: 16px;
  color: var(--anthracite);
  max-width: 800px;
}

/* INSCRIPTION / FORM ----------------------------------- */

.form {
  margin-top: 32px;
  max-width: 800px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.form label {
  display: block;
}

.form label span {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gris-clair);
  margin-bottom: 8px;
}

.form input,
.form textarea,
.form select {
  width: 100%;
  font-family: var(--font-corps);
  font-size: 16px;
  padding: 14px 16px;
  background: transparent;
  border: 1px solid var(--gris);
  color: var(--blanc);
  transition: border-color 0.2s;
}

.form select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3e%3cpath fill='%23ffffff' d='M6 8L0 0h12z'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

.form select option {
  background: var(--noir);
  color: var(--blanc);
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-color: var(--blanc);
}

.form input::placeholder,
.form textarea::placeholder {
  color: var(--gris);
}

.form label.full {
  display: block;
  margin-bottom: 32px;
}

.form button {
  margin-top: 16px;
}

.form-note {
  margin-top: 24px;
  font-size: 13px;
  color: var(--gris-clair);
  font-style: italic;
  max-width: 600px;
}

.hidden-field {
  position: absolute;
  left: -9999px;
}

/* REFERENCES ------------------------------------------- */

.refs {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-top: 32px;
  margin-bottom: 32px;
  max-width: 900px;
}

@media (max-width: 600px) {
  .refs {
    grid-template-columns: 1fr;
  }
}

.refs li {
  padding: 20px 0;
  border-top: 1px solid var(--gris-clair);
  font-size: 16px;
  color: var(--anthracite);
}

.refs li:nth-child(odd) {
  padding-right: 24px;
}

.refs li:nth-child(even) {
  padding-left: 24px;
  border-left: 1px solid var(--gris-clair);
}

@media (max-width: 600px) {
  .refs li:nth-child(odd),
  .refs li:nth-child(even) {
    padding-left: 0;
    padding-right: 0;
    border-left: none;
  }
}

.refs-note {
  font-size: 14px;
  color: var(--gris);
  font-style: italic;
  margin-top: 24px;
  max-width: 700px;
}

.testimonials {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 48px;
  max-width: 900px;
}

.testimonial {
  padding-left: 24px;
  border-left: 2px solid var(--noir);
  margin: 0;
}

.testimonial p {
  font-family: var(--font-titre);
  font-size: clamp(18px, 2vw, 22px);
  font-style: italic;
  font-weight: 500;
  color: var(--noir);
  line-height: 1.45;
  margin-bottom: 12px;
}

.testimonial cite {
  font-family: var(--font-corps);
  font-style: normal;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--gris);
  text-transform: uppercase;
}

/* FOOTER ----------------------------------------------- */

.site-footer {
  background: var(--noir);
  color: var(--blanc);
  padding: 80px 0 48px;
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 48px;
  align-items: start;
}

@media (max-width: 720px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.logo-footer {
  height: 180px;
  width: auto;
}

.footer-text p {
  margin-bottom: 8px;
  color: var(--gris-clair);
  font-size: 14px;
  line-height: 1.6;
}

.footer-text p:first-child {
  font-family: var(--font-titre);
  font-size: 20px;
  font-weight: 700;
  color: var(--blanc);
  margin-bottom: 12px;
}

.footer-text a {
  color: var(--blanc);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  font-size: 13px;
  color: var(--gris);
}

@media (max-width: 720px) {
  .footer-meta {
    align-items: flex-start;
  }
}

.footer-meta a {
  color: var(--gris-clair);
}

.footer-meta .copy {
  color: var(--gris);
  margin-top: 8px;
}

.footer-meta .built-with {
  color: var(--gris);
  margin-top: 4px;
  font-size: 0.85rem;
  font-style: italic;
}

.loc-served {
  display: block;
  margin-top: 6px;
  color: var(--gris);
  font-size: 0.9rem;
}

.point-foot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blanc);
  margin-bottom: 8px;
}

/* Selection / Accessibilité ---------------------------- */

::selection {
  background: var(--noir);
  color: var(--blanc);
}

:focus-visible {
  outline: 2px solid var(--noir);
  outline-offset: 4px;
}

.dark :focus-visible {
  outline: 2px solid var(--blanc);
}