/* ==========================================================================
   GEP Éditions — design system
   Direction : editorial-magazine · palette Blue Note · radius 0 · flat
   ========================================================================== */

:root {
  --ink: #1D3557;
  --accent: #49A3EE;
  --accent-soft: #9DC3E6;
  --paper: #F0F6FC;
  --white: #FFFFFF;
  --hairline: rgba(29, 53, 87, 0.16);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Sora", system-ui, sans-serif;
  background-color: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

.font-display {
  font-family: "Bricolage Grotesque", "Sora", sans-serif;
}

/* -- Kicker éditorial ------------------------------------------------ */
.kicker {
  display: inline-block;
  font-family: "Bricolage Grotesque", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

/* -- Hairlines (magazine rules) -------------------------------------- */
.rule {
  border-color: var(--hairline);
}

/* -- Liens et CTA ---------------------------------------------------- */
.link-underline {
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
  text-underline-offset: 4px;
  transition: text-decoration-color 0.25s ease;
}
.link-underline:hover {
  text-decoration-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.8rem 1.5rem;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  border: 1px solid transparent;
}
.btn-ink {
  background-color: var(--ink);
  color: var(--white);
}
.btn-ink:hover {
  background-color: #16304f;
}
.btn-accent {
  background-color: var(--accent);
  color: var(--white);
}
.btn-accent:hover {
  background-color: #2f8edd;
}
.btn-outline {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-outline:hover {
  background-color: var(--ink);
  color: var(--white);
}
.btn-outline-light {
  border-color: var(--white);
  color: var(--white);
  background: transparent;
}
.btn-outline-light:hover {
  background-color: var(--white);
  color: var(--ink);
}

/* -- Navigation ------------------------------------------------------ */
.nav-link {
  position: relative;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}
.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--accent);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background-color: var(--accent);
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 15rem;
  background-color: var(--white);
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--accent);
  padding: 0.5rem 0;
}
.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu,
.nav-item.is-open .dropdown-menu {
  display: block;
}
.dropdown-menu a {
  display: block;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  color: var(--ink);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.dropdown-menu a:hover {
  background-color: var(--paper);
  color: var(--accent);
}

@media (min-width: 1024px) {
  .dropdown-caret {
    transition: transform 0.2s ease;
  }
  .nav-item:hover .dropdown-caret,
  .nav-item:focus-within .dropdown-caret,
  .nav-item.is-open .dropdown-caret {
    transform: rotate(180deg);
  }
}

/* Menu mobile */
#menu-mobile {
  display: none;
}
#menu-mobile.is-open {
  display: block;
}
#menu-mobile .sub {
  display: none;
  padding-left: 1rem;
}
#menu-mobile .is-open .sub {
  display: block;
}

/* -- Hero éditorial -------------------------------------------------- */
.hero-media {
  position: relative;
  min-height: min(78vh, 640px);
  display: flex;
  align-items: flex-end;
}
@media (min-width: 1024px) {
  .hero-media {
    min-height: calc(100svh - 5rem);
    align-items: center;
  }
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(13, 28, 47, 0.88) 0%,
    rgba(13, 28, 47, 0.62) 42%,
    rgba(13, 28, 47, 0.12) 78%,
    rgba(13, 28, 47, 0) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 1;
}

/* -- Révélations (motion plan) ---------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.is-in-view {
  opacity: 1;
  transform: none;
}
.hero-content .reveal:nth-child(1) { transition-delay: 0.05s; }
.hero-content .reveal:nth-child(2) { transition-delay: 0.15s; }
.hero-content .reveal:nth-child(3) { transition-delay: 0.25s; }
.hero-content .reveal:nth-child(4) { transition-delay: 0.35s; }

.img-zoom {
  overflow: hidden;
}
.img-zoom img {
  transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.img-zoom:hover img,
.img-zoom:focus-within img {
  transform: scale(1.045);
}

/* -- Blocs éditoriaux (modules parutions) ----------------------------- */
.book-row {
  display: grid;
  gap: 1rem;
  padding: 2rem 0;
  border-top: 1px solid var(--hairline);
}
@media (min-width: 768px) {
  .book-row {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}

/* -- Accent inversé (section navy) ------------------------------------ */
.section-inverted {
  background-color: var(--ink);
  color: var(--white);
}
.section-inverted .kicker {
  color: var(--accent-soft);
}

/* -- Accordéon FAQ ---------------------------------------------------- */
.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.accordion-item.is-open .accordion-panel {
  max-height: 30rem;
}
.accordion-item.is-open .accordion-chevron {
  transform: rotate(180deg);
}
.accordion-chevron {
  transition: transform 0.25s ease;
}

/* -- Accessibilité ---------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .img-zoom img,
  .accordion-chevron,
  .dropdown-caret {
    transition: none;
  }
}