/* ============================================================
   COCON IA - STYLES.CSS
   Design system Vodafone-inspired (aligné sur landing v4)
   Sentence case sur titres. Single red accent. Flat by design.
   ============================================================ */

:root {
  --c-primary: #0D0D0D;
  --c-secondary: #6D6D6D;
  --c-tertiary: #E60000;
  --c-neutral: #F4F4F4;
  --c-surface: #FFFFFF;
  --c-on-primary: #FFFFFF;

  --ff-display: 'Archivo Black', sans-serif;
  --ff-body: 'Inter', sans-serif;

  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 6px;

  --s-xs: 4px;
  --s-sm: 8px;
  --s-md: 16px;
  --s-lg: 32px;
  --s-xl: 64px;
  --s-2xl: 128px;

  --max-w: 1280px;
  --gutter: clamp(20px, 5vw, 60px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--ff-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-primary);
  background: var(--c-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: var(--c-tertiary); color: var(--c-on-primary); }

/* TYPOGRAPHY (aligné landing v4 — sentence case, Archivo Black porte le monumental) */
.display, .h1, .h2, .h3 {
  font-family: var(--ff-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.display { font-size: clamp(2.4rem, 7vw, 6rem); line-height: 1.02; letter-spacing: -0.025em; }
.h1 { font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.06; letter-spacing: -0.02em; }
.h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); line-height: 1.12; letter-spacing: -0.015em; }
.h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); line-height: 1.25; letter-spacing: -0.005em; }

.label {
  font-family: var(--ff-body);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-tertiary);
  display: block;
}

.lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); line-height: 1.5; max-width: 60ch; }
.prose { max-width: 70ch; line-height: 1.7; color: var(--c-primary); margin-top: var(--s-lg); }
.prose p + p { margin-top: var(--s-md); }

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

/* LAYOUT */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section { padding: var(--s-xl) 0; }
@media (min-width: 768px) { section { padding: var(--s-2xl) 0; } }

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-surface);
  border-bottom: 1px solid #eee;
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}
.nav-logo {
  font-family: var(--ff-display);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--c-tertiary); }
.nav-cta {
  background: var(--c-primary);
  color: var(--c-on-primary);
  padding: 10px 18px;
  font-family: var(--ff-body);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--r-md);
  transition: background 0.2s ease;
}
.nav-cta:hover { background: var(--c-tertiary); }

/* BREADCRUMB */
.breadcrumb {
  background: var(--c-neutral);
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--c-secondary);
}
.breadcrumb li:not(:last-child)::after {
  content: " / ";
  margin-left: 8px;
  color: var(--c-secondary);
  opacity: 0.5;
}
.breadcrumb a:hover { color: var(--c-tertiary); }
.breadcrumb [aria-current="page"] { color: var(--c-primary); font-weight: 700; }

/* BUTTONS */
.btn {
  display: inline-block;
  font-family: var(--ff-body);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  padding: 16px 28px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--c-tertiary); color: var(--c-on-primary); }
.btn-ghost {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}
.btn-ghost:hover { background: var(--c-primary); color: var(--c-on-primary); }

/* HERO */
.hero {
  padding: 80px 0 var(--s-xl);
  position: relative;
}
.hero-eyebrow { color: var(--c-tertiary); margin-bottom: var(--s-lg); }
.hero-title { margin-bottom: var(--s-lg); }
.hero-title em { font-style: normal; color: var(--c-tertiary); }
.hero-lead { color: var(--c-secondary); margin-bottom: var(--s-lg); }
.hero-actions { display: flex; gap: var(--s-md); flex-wrap: wrap; }
.hero-meta {
  margin-top: var(--s-xl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s-md);
  border-top: 1px solid #eee;
  padding-top: var(--s-lg);
}
.hero-meta-item .label { color: var(--c-secondary); display: block; margin-bottom: 4px; }
.hero-meta-item strong {
  font-family: var(--ff-display);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

/* RED CHAPTER BAND */
.band {
  background: var(--c-tertiary);
  color: var(--c-on-primary);
  padding: var(--s-xl) 0;
}
.band .h2 { margin-bottom: var(--s-md); }
.band .lead { color: var(--c-on-primary); opacity: 0.95; }

/* STATS */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--c-primary);
  margin-top: var(--s-lg);
}
.stat { background: var(--c-surface); padding: var(--s-lg); }
.stat-num {
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-tertiary);
  margin-bottom: var(--s-sm);
}
.stat-label { color: var(--c-secondary); font-size: 0.95rem; }
.stat-source {
  margin-top: var(--s-md);
  font-size: 0.7rem;
  color: var(--c-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* USECASE CARDS */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--s-md);
  margin-top: var(--s-lg);
}
.usecase-card {
  background: var(--c-surface);
  border: 2px solid var(--c-primary);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.usecase-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-tertiary);
}
.usecase-card .h3 { margin-bottom: var(--s-md); }
.usecase-card p { color: var(--c-secondary); margin-bottom: var(--s-md); }
.usecase-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: var(--s-md);
  border-top: 1px solid #eee;
}
.usecase-meta-item {
  font-size: 0.85rem;
  color: var(--c-primary);
}
.usecase-meta-item strong {
  color: var(--c-tertiary);
  font-weight: 700;
}

/* OFFERS */
.offers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--s-md);
  margin-top: var(--s-lg);
}
.offer {
  background: var(--c-surface);
  border: 2px solid var(--c-primary);
  padding: var(--s-lg);
  display: flex;
  flex-direction: column;
  border-radius: var(--r-lg);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.offer:hover { transform: translateY(-4px); border-color: var(--c-tertiary); }
.offer-num {
  font-family: var(--ff-display);
  font-size: 3rem;
  line-height: 1;
  color: var(--c-tertiary);
  margin-bottom: var(--s-md);
}
.offer-name { margin-bottom: var(--s-sm); }
.offer-tagline {
  color: var(--c-secondary);
  margin-bottom: var(--s-md);
  font-size: 0.95rem;
}
.offer-meta {
  display: flex;
  gap: var(--s-md);
  flex-wrap: wrap;
  margin-bottom: var(--s-md);
  font-size: 0.78rem;
  color: var(--c-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.offer-meta span { padding: 4px 10px; background: var(--c-neutral); border-radius: var(--r-sm); }
.offer ul { list-style: none; margin-bottom: var(--s-lg); }
.offer li {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
  font-size: 0.95rem;
  display: flex;
  gap: var(--s-sm);
}
.offer li::before {
  content: "→";
  color: var(--c-tertiary);
  font-weight: 700;
  flex-shrink: 0;
}
.offer li:last-child { border-bottom: none; }
.offer-cta { margin-top: auto; }

/* FAQ */
.faq-list {
  margin-top: var(--s-lg);
  display: flex;
  flex-direction: column;
  gap: var(--s-sm);
}
.faq-item {
  background: var(--c-surface);
  border-radius: var(--r-md);
  border-left: 4px solid var(--c-tertiary);
  padding: var(--s-md) var(--s-lg);
  transition: background 0.2s ease;
}
.faq-item[open] { background: var(--c-neutral); }
.faq-question {
  font-family: var(--ff-body);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 32px;
  color: var(--c-primary);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ff-display);
  color: var(--c-tertiary);
  font-size: 1.5rem;
  line-height: 1;
}
.faq-item[open] .faq-question::after { content: "−"; }
.faq-answer {
  margin-top: var(--s-md);
  color: var(--c-secondary);
  line-height: 1.6;
}
.faq-answer p { margin: 0; }

/* RELATED CARDS */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--s-md);
  margin-top: var(--s-lg);
}
.related-card {
  background: rgba(255,255,255,0.05);
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
  display: flex;
  flex-direction: column;
  gap: var(--s-sm);
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-tertiary);
  background: rgba(230,0,0,0.1);
}
.related-card .h3 { color: var(--c-on-primary); }
.related-card p {
  color: var(--c-on-primary);
  opacity: 0.7;
  font-size: 0.9rem;
  flex: 1;
}
.related-arrow {
  font-family: var(--ff-display);
  color: var(--c-tertiary);
  font-size: 1.5rem;
  align-self: flex-end;
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-lg);
  margin-top: var(--s-lg);
}
@media (min-width: 900px) {
  .about-grid { grid-template-columns: 1fr 1fr; gap: var(--s-xl); align-items: start; }
}
.about-points { display: flex; flex-direction: column; gap: var(--s-md); }
.about-point {
  border-left: 4px solid var(--c-tertiary);
  padding-left: var(--s-md);
}
.about-point .label { color: var(--c-tertiary); display: block; margin-bottom: 4px; }
.about-point strong {
  display: block;
  font-family: var(--ff-display);
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

/* FINAL CTA */
.final-cta { text-align: center; }
.final-cta .display { margin-bottom: var(--s-lg); }
.final-cta .lead {
  margin: 0 auto var(--s-lg);
  color: var(--c-on-primary);
  opacity: 0.9;
}
.final-cta .btn { font-size: 1rem; padding: 20px 36px; }

/* FOOTER */
footer {
  background: var(--c-primary);
  color: var(--c-on-primary);
  padding: var(--s-lg) 0;
}

/* ============================================================
   BOUTON FLOTTANT CAL.COM (chargement au clic seulement)
   ============================================================ */
.cal-floating {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  background: var(--c-primary);
  color: var(--c-on-primary);
  border: none;
  padding: 14px 22px;
  border-radius: var(--r-md);
  font-family: var(--ff-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.cal-floating:hover {
  background: var(--c-tertiary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230, 0, 0, 0.35);
}
.cal-floating:focus-visible {
  outline: 3px solid var(--c-tertiary);
  outline-offset: 3px;
}
@media (max-width: 600px) {
  .cal-floating {
    bottom: 16px;
    right: 16px;
    padding: 12px 18px;
    font-size: 0.78rem;
  }
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-md);
}
.footer-inner p, .footer-inner a {
  font-size: 0.85rem;
  color: var(--c-on-primary);
  opacity: 0.8;
}
.footer-inner a:hover { color: var(--c-tertiary); opacity: 1; }

/* ANIMATIONS */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
  }
  .reveal.in { opacity: 1; transform: translateY(0); }
}

/* A11Y */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--c-tertiary);
  outline-offset: 3px;
}