/**
 * Header type LMS (réf. EDUGRADE) — barres noires, accents dégradé rouge.
 * Chargé après header-premium.css pour override.
 */

:root {
  --kp-edu-red-1: #ff1238;
  --kp-edu-red-2: #ea0c22;
  --kp-edu-red-3: #b8071b;
  --kp-edu-red-4: #4b0208;
  --kp-edu-white: #ffffff;
  /* Même famille que le footer / logo (bordeaux → rouge signature) */
  --kp-brand-grad: linear-gradient(
    90deg,
    #4b0208 0%,
    #760611 28%,
    #a00918 60%,
    #d01429 100%
  );
  /* Dégradé étendu pour animation fluide du fond header */
  --kp-header-grad-animated: linear-gradient(
    105deg,
    #4b0208 0%,
    #5c0610 12%,
    #760611 28%,
    #a00918 42%,
    #ea0c22 55%,
    #ff153e 68%,
    #d01429 82%,
    #6a0812 94%,
    #4b0208 100%
  );
}

@keyframes kp-header-grad-flow {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes kp-nav-item-in {
  from {
    opacity: 0;
    transform: translateY(-0.45rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kp-logo-intro {
  from {
    opacity: 0;
    transform: translateX(-0.35rem) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

/**
 * Barre fixe : dégradé rouge logo + léger mouvement (couche GPU stable).
 */
.kp-fixed-bar {
  background-color: var(--kp-edu-red-3);
  background-image: var(--kp-header-grad-animated);
  background-size: 220% 100%;
  background-position: 0% 50%;
  animation: kp-header-grad-flow 16s ease-in-out infinite;
  isolation: isolate;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

@media (prefers-reduced-motion: reduce) {
  .kp-fixed-bar {
    animation: none;
    background-image: var(--kp-brand-grad);
    background-size: 100% 100%;
    background-position: center;
  }
}

/* Hero pages intérieures : pas de fond « fixed » sous un header fixed (artefacts / décalage couleur) */
.hero-unified.parallax-bg {
  background-attachment: scroll !important;
}

/* --- Barre supérieure --- */
.kp-edu-topbar {
  background: rgba(0, 0, 0, 0.45);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.kp-edu-topbar a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity 0.2s ease, filter 0.2s ease;
}
.kp-edu-topbar a:hover {
  opacity: 1;
  filter: brightness(1.08);
}
.kp-edu-gradient-text {
  color: var(--kp-edu-red-1) !important;
  font-weight: 600;
}
.kp-edu-topbar .kp-edu-topbar-actions a {
  text-transform: uppercase;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

/* --- Header : fond laissé au dégradé du parent .kp-fixed-bar --- */
.kp-header.kp-edu-dark {
  background: transparent !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16) !important;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.06) !important;
  border-top: none !important;
}
.kp-header.kp-edu-dark.kp-header--scrolled,
.kp-header.kp-edu-dark.header-scrolled {
  background: transparent !important;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.08),
    0 10px 28px rgba(45, 2, 8, 0.22) !important;
}


.kp-edu-brand-sub {
  font-size: 0.625rem;
  line-height: 1.2;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  max-width: 14rem;
  transition: color 0.35s ease, letter-spacing 0.45s cubic-bezier(0.34, 1.2, 0.64, 1);
}

/* Logo : entrée page + survol */
.kp-header.kp-edu-dark .kp-logo {
  animation: kp-logo-intro 0.65s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.kp-header.kp-edu-dark .kp-logo img {
  transition: transform 0.45s cubic-bezier(0.34, 1.3, 0.64, 1),
    filter 0.35s ease;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.18));
}

.kp-header.kp-edu-dark .kp-logo:hover img {
  transform: scale(1.06) rotate(-1deg);
  filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.28));
}

.kp-header.kp-edu-dark .kp-logo:hover .kp-edu-brand-sub {
  color: rgba(255, 255, 255, 0.82);
  letter-spacing: 0.22em;
}

@media (prefers-reduced-motion: reduce) {
  .kp-header.kp-edu-dark .kp-logo {
    animation: none;
  }
  .kp-header.kp-edu-dark .kp-logo:hover img {
    transform: none;
  }
}

/* Nav desktop — style LMS */
.kp-edu-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kp-edu-nav .kp-edu-nav-link {
  display: inline-block;
  padding: 0.45rem 0.75rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92) !important;
  border-radius: 9999px;
  border: 2px solid transparent;
  transition: color 0.3s ease, box-shadow 0.35s ease, background 0.3s ease,
    transform 0.3s cubic-bezier(0.34, 1.25, 0.64, 1), border-color 0.3s ease;
  position: relative;
}
.kp-edu-nav .kp-edu-nav-link:hover {
  color: #fff !important;
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

/* Actif : pilule lumineuse sur dégradé */
.kp-edu-nav .kp-edu-nav-link.nav-link--active {
  color: #fff !important;
  font-weight: 700;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.22) 0%,
    rgba(255, 255, 255, 0.06) 100%
  ) !important;
  border: 1px solid rgba(255, 255, 255, 0.42) !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

@media (min-width: 768px) {
  .kp-edu-nav ul.flex.flex-row > li {
    animation: kp-nav-item-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) backwards;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(1) {
    animation-delay: 0.04s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(2) {
    animation-delay: 0.08s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(3) {
    animation-delay: 0.12s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(4) {
    animation-delay: 0.16s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(5) {
    animation-delay: 0.2s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(6) {
    animation-delay: 0.24s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(7) {
    animation-delay: 0.28s;
  }
  .kp-edu-nav ul.flex.flex-row > li:nth-child(8) {
    animation-delay: 0.32s;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kp-edu-nav ul.flex.flex-row > li {
    animation: none;
  }
  .kp-edu-nav .kp-edu-nav-link:hover {
    transform: none;
  }
}
.kp-edu-nav .kp-edu-nav-link::after {
  display: none !important;
}

.kp-header.kp-edu-dark #menu-button {
  color: #fff !important;
  transition: transform 0.3s cubic-bezier(0.34, 1.3, 0.64, 1),
    background 0.25s ease, box-shadow 0.25s ease;
}
.kp-header.kp-edu-dark #menu-button:hover {
  background: rgba(255, 255, 255, 0.12) !important;
  transform: scale(1.06);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}
.kp-header.kp-edu-dark #menu-button:active {
  transform: scale(0.96);
}

@media (prefers-reduced-motion: reduce) {
  .kp-header.kp-edu-dark #menu-button:hover,
  .kp-header.kp-edu-dark #menu-button:active {
    transform: none;
  }
}

/* CTA header — contraste sur dégradé + reflet au survol */
.kp-edu-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    155deg,
    #fff 0%,
    #ffeef1 35%,
    #ffd6dc 100%
  );
  color: #7a0612 !important;
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: 0 4px 18px rgba(45, 2, 8, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  transition: transform 0.35s cubic-bezier(0.34, 1.25, 0.64, 1),
    box-shadow 0.35s ease, color 0.25s ease;
  white-space: nowrap;
}

.kp-edu-header-cta > * {
  position: relative;
  z-index: 1;
}

.kp-edu-header-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(
    105deg,
    transparent 35%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 65%
  );
  transform: translateX(-120%) skewX(-12deg);
  transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}

.kp-edu-header-cta:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 28px rgba(45, 2, 8, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  color: #4b0208 !important;
}

.kp-edu-header-cta:hover::before {
  transform: translateX(120%) skewX(-12deg);
}

.kp-edu-header-cta:active {
  transform: translateY(-1px) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .kp-edu-header-cta::before {
    display: none;
  }
  .kp-edu-header-cta:hover {
    transform: translateY(-1px);
  }
}

/* Mobile drawer — transitions */
#mobile-menu-container.mobile-drawer .kp-edu-mobile-link {
  transition: transform 0.3s cubic-bezier(0.34, 1.15, 0.64, 1),
    background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

#mobile-menu-container.mobile-drawer .kp-edu-mobile-link:hover {
  transform: translateX(6px);
  background: rgba(255, 255, 255, 0.08);
}

@media (prefers-reduced-motion: reduce) {
  #mobile-menu-container.mobile-drawer .kp-edu-mobile-link:hover {
    transform: none;
  }
}

/* Mobile drawer — lien actif */
#mobile-menu-container.mobile-drawer .kp-edu-mobile-link.nav-link--active {
  background: rgba(234, 12, 34, 0.24);
  border: 1px solid rgba(255, 18, 56, 0.65);
  color: #fff !important;
}

@media (min-width: 768px) {
  body.kp-body {
    padding-top: 0;
  }
}