/* ============================================================================
   PhotoFlow — site vitrine
   Palette et échelle reprises de docs/CHARTE.md : gris strictement neutres,
   un seul accent, sombre par défaut (media query, zéro JavaScript nécessaire
   pour l'affichage — bon pour le référencement comme pour la performance).
   ========================================================================== */

:root {
  --bg: #101010;
  --card: #242424;
  --card-2: #2e2e2e;
  --line: #3a3a3a;
  --text: #ececec;
  --text-2: #ababab;
  --outline: #6f6f6f;

  --accent: #5ab8f0;
  --on-accent: #00293d;
  --accent-container: #0d4a68;
  --on-accent-container: #cfe9fb;

  --success-fg: #86dfa6;
  --success-bg: #10301e;
  --warn-fg: #f0c97a;
  --warn-bg: #32280e;

  --radius-block: 20px;
  --radius-control: 12px;
  --gutter: 16px;
  --max-width: 1080px;
  --max-text: 680px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ededed;
    --card: #ffffff;
    --card-2: #f5f5f5;
    --line: #dddddd;
    --text: #1a1a1a;
    --text-2: #595959;
    --outline: #8a8a8a;

    --accent: #0b6fa4;
    --on-accent: #ffffff;
    --accent-container: #cfe7f7;
    --on-accent-container: #04283c;

    --success-fg: #0e5132;
    --success-bg: #dcf1e5;
    --warn-fg: #6b4600;
    --warn-bg: #fbebc8;
  }
  .card { border: 1px solid var(--line); }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); }
a:not([class]) { text-decoration-thickness: 1px; text-underline-offset: 2px; }

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

/* Accès rapide au contenu pour les lecteurs d'écran et la navigation clavier. */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 12px 20px;
  border-radius: 0 0 var(--radius-control) 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------------------------------- Header --------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}
.brand svg { width: 28px; height: 28px; }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--on-accent);
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}

@media (max-width: 720px) {
  .nav-links { display: none; }
}

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

.hero {
  padding: 72px 0 56px;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  font-weight: 800;
  margin: 0 0 20px;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-2);
  max-width: 46ch;
  margin: 0 0 32px;
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--outline); }

.hero-visual {
  display: flex;
  justify-content: center;
}
.phone-frame {
  width: min(280px, 70vw);
  border-radius: 32px;
  border: 6px solid var(--card-2);
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.5);
}
.phone-frame img { width: 100%; }

/* ------------------------------- Bandeau confiance ------------------------- */

.trust {
  margin: 0 0 64px;
}
.trust-card {
  background: var(--accent-container);
  color: var(--on-accent-container);
  border-radius: var(--radius-block);
  padding: 32px clamp(20px, 4vw, 40px);
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.trust-card svg {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  margin-top: 4px;
}
.trust-card h2 { margin: 0 0 8px; font-size: 1.4rem; }
.trust-card p { margin: 0; opacity: 0.92; max-width: 62ch; }
.trust-card a { color: inherit; font-weight: 700; }

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

section { padding: 56px 0; }

.section-head { max-width: var(--max-text); margin: 0 0 40px; }
.section-head .eyebrow { margin-bottom: 10px; }
h2.section-title { font-size: clamp(1.6rem, 3vw, 2.1rem); margin: 0 0 12px; letter-spacing: -0.01em; }
.section-head p { color: var(--text-2); margin: 0; font-size: 1.05rem; }

/* Étapes */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }

.step {
  background: var(--card);
  border-radius: var(--radius-block);
  padding: 28px;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-control);
  background: var(--accent-container);
  color: var(--on-accent-container);
  font-weight: 800;
  margin-bottom: 16px;
}
.step h3 { margin: 0 0 8px; font-size: 1.1rem; }
.step p { margin: 0; color: var(--text-2); font-size: 0.97rem; }

/* Grille de fonctionnalités */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border-radius: var(--radius-block);
  padding: 26px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; display: flex; gap: 10px; align-items: center; }
.card h3 svg { width: 22px; height: 22px; color: var(--accent); flex-shrink: 0; }
.card p { margin: 0; color: var(--text-2); font-size: 0.95rem; }

/* Plateformes */
.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag {
  background: var(--card-2);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

/* Captures d'écran */
.screens {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
}
.screens figure { margin: 0; text-align: center; max-width: 260px; }
.screens figcaption { margin-top: 14px; color: var(--text-2); font-size: 0.9rem; }

/* FAQ */
.faq-list { max-width: var(--max-text); }
.faq-item {
  background: var(--card);
  border-radius: var(--radius-control);
  margin-bottom: 12px;
  padding: 4px 22px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  padding: 18px 0;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 16px;
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 400;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin: 0 0 20px; color: var(--text-2); }

/* CTA final */
.cta-final {
  text-align: center;
  background: var(--card);
  border-radius: var(--radius-block);
  padding: 56px clamp(20px, 6vw, 80px);
}
.cta-final h2 { margin: 0 0 12px; }
.cta-final p { color: var(--text-2); margin: 0 0 28px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-links {
  display: flex;
  gap: 22px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}
.footer-links a { color: var(--text-2); text-decoration: none; font-size: 0.92rem; }
.footer-links a:hover { color: var(--text); }
.footer-fine { color: var(--text-2); font-size: 0.85rem; margin-top: 24px; max-width: 70ch; }

/* Pages légales */
.legal main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px var(--gutter) 80px;
}
.legal h1 { font-size: 2rem; margin-bottom: 4px; }
.legal .updated { color: var(--text-2); font-size: 0.9rem; margin-bottom: 40px; }
.legal h2 { font-size: 1.3rem; margin-top: 40px; }
.legal h3 { font-size: 1.05rem; margin-top: 28px; }
.legal p, .legal li { color: var(--text-2); }
.legal table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.legal th, .legal td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 0.92rem; }
.legal th { color: var(--text); }
.legal strong { color: var(--text); }
.placeholder { background: var(--warn-bg); color: var(--warn-fg); padding: 1px 6px; border-radius: 4px; font-size: 0.9em; }