/* ============================================
   NIVEAU 21 — LES TRANSITIONS
   Styles spécifiques aux démonstrations de transitions
   ============================================ */

/* ---------- TIMING FUNCTION VISUALIZER ---------- */
.timing-viz {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.timing-card {
  text-align: center;
}

.timing-card .timing-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  font-family: var(--police-code);
  background: #f1f5f9;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.timing-track {
  position: relative;
  height: 32px;
  background: #f1f5f9;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 0.3rem;
}

.timing-ball {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--couleur-primaire), var(--couleur-secondaire));
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.4);
  transition-timing-function: ease;
  transition-duration: 1.5s;
  transition-property: left;
}

.timing-track:hover .timing-ball {
  left: calc(100% - 28px);
}

.timing-card .timing-ease .timing-ball { transition-timing-function: ease; }
.timing-card .timing-linear .timing-ball { transition-timing-function: linear; }
.timing-card .timing-ease-in .timing-ball { transition-timing-function: ease-in; }
.timing-card .timing-ease-out .timing-ball { transition-timing-function: ease-out; }
.timing-card .timing-ease-in-out .timing-ball { transition-timing-function: ease-in-out; }

/* ---------- CUBIC BEZIER DEMO ---------- */
.bezier-track {
  position: relative;
  height: 40px;
  background: #f1f5f9;
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 0.3rem;
}

.bezier-ball {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f97316, #ef4444);
  box-shadow: 0 2px 6px rgba(249, 115, 22, 0.4);
  transition-property: left;
  transition-duration: 1.5s;
}

.bezier-track:hover .bezier-ball {
  left: calc(100% - 34px);
}

/* ---------- BUTTON HOVER EFFECTS ---------- */
.demo-button-effects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.btn-demo {
  text-align: center;
}

.btn-demo .btn-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

/* Color transition */
.btn-color {
  background: var(--couleur-primaire);
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

.btn-color:hover {
  background: var(--couleur-secondaire);
}

/* Size transition */
.btn-size {
  background: var(--couleur-succes);
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform 0.3s ease, padding 0.3s ease;
}

.btn-size:hover {
  padding: 0.8rem 2rem;
}

/* Shadow transition */
.btn-shadow {
  background: #7c3aed;
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  box-shadow: 0 2px 4px rgba(124, 58, 237, 0.3);
}

.btn-shadow:hover {
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4);
  transform: translateY(-2px);
}

/* Underline slide */
.btn-underline {
  background: none;
  color: var(--couleur-primaire);
  border: 2px solid var(--couleur-primaire);
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color 0.3s ease;
}

.btn-underline::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--couleur-primaire);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.btn-underline:hover {
  color: white;
  background: var(--couleur-primaire);
}

.btn-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ---------- CARD HOVER EFFECTS ---------- */
.demo-card-effects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.card-demo {
  text-align: center;
}

.card-demo .card-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

/* Card lift */
.card-lift {
  background: white;
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
  padding: 1.25rem;
  box-shadow: var(--ombre);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
}

.card-lift:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

/* Card shadow grow */
.card-shadow {
  background: white;
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
  padding: 1.25rem;
  box-shadow: var(--ombre);
  transition: box-shadow 0.4s ease;
  cursor: pointer;
}

.card-shadow:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Card image zoom */
.card-zoom {
  background: white;
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
  overflow: hidden;
  cursor: pointer;
}

.card-zoom .card-zoom-img {
  width: 100%;
  height: 100px;
  background: linear-gradient(135deg, #f97316, #ef4444);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  transition: transform 0.4s ease;
}

.card-zoom:hover .card-zoom-img {
  transform: scale(1.08);
}

.card-zoom .card-zoom-text {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
}

/* ---------- NAV UNDERLINE ANIMATION ---------- */
.demo-nav-underline {
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.nav-animated {
  display: flex;
  gap: 0;
  background: var(--couleur-code-bg);
  border-radius: var(--rayon);
  overflow: hidden;
}

.nav-animated a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  position: relative;
  transition: color 0.3s ease;
}

.nav-animated a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--couleur-primaire);
  transition: width 0.3s ease, left 0.3s ease;
  border-radius: 2px 2px 0 0;
}

.nav-animated a:hover {
  color: white;
}

.nav-animated a:hover::after {
  width: 60%;
  left: 20%;
}

/* ---------- LINK UNDERLINE REVEAL ---------- */
.demo-link-underline {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.link-reveal {
  color: var(--couleur-primaire);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  position: relative;
}

.link-reveal::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--couleur-primaire);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.link-reveal:hover::after {
  transform: scaleX(1);
}

/* ---------- INPUT FOCUS EFFECTS ---------- */
.demo-input-effects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.input-demo {
  text-align: center;
}

.input-demo .input-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

/* Border bottom */
.input-border-bottom {
  border: none;
  border-bottom: 2px solid var(--couleur-bordure);
  padding: 0.5rem;
  font-size: 0.85rem;
  background: transparent;
  width: 100%;
  outline: none;
  transition: border-color 0.3s ease;
}

.input-border-bottom:focus {
  border-bottom-color: var(--couleur-primaire);
}

/* Glow */
.input-glow {
  border: 2px solid var(--couleur-bordure);
  padding: 0.5rem;
  font-size: 0.85rem;
  background: transparent;
  width: 100%;
  border-radius: 6px;
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.input-glow:focus {
  border-color: var(--couleur-primaire);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Expand */
.input-expand {
  border: 2px solid var(--couleur-bordure);
  padding: 0.5rem;
  font-size: 0.85rem;
  background: transparent;
  width: 60%;
  border-radius: 6px;
  outline: none;
  transition: width 0.3s ease, border-color 0.3s ease;
}

.input-expand:focus {
  width: 100%;
  border-color: var(--couleur-secondaire);
}

/* ---------- CHECKBOX TOGGLE ---------- */
.demo-toggle {
  display: flex;
  gap: 2rem;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
}

.toggle-input {
  display: none;
}

.toggle-slider {
  position: relative;
  width: 48px;
  height: 26px;
  background: #cbd5e1;
  border-radius: 13px;
  transition: background 0.3s ease;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
  transition: transform 0.3s ease;
}

.toggle-input:checked + .toggle-slider {
  background: var(--couleur-succes);
}

.toggle-input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

/* ---------- ACCORDION ---------- */
.demo-accordion {
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.accordion-item {
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.accordion-input {
  display: none;
}

.accordion-header {
  display: block;
  padding: 0.75rem 1rem;
  background: #f8fafc;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.3s ease;
}

.accordion-header:hover {
  background: #f1f5f9;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 1rem;
}

.accordion-input:checked ~ .accordion-content {
  max-height: 150px;
  padding: 0.75rem 1rem;
}

.accordion-content p {
  font-size: 0.85rem;
  color: var(--couleur-texte-clair);
  margin-bottom: 0;
}

/* ---------- MENU SLIDE-IN ---------- */
.demo-slide-menu {
  position: relative;
  min-height: 250px;
  background: #f1f5f9;
  border: 2px solid var(--couleur-bordure);
  border-radius: var(--rayon);
  overflow: hidden;
}

.slide-menu-trigger {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  background: var(--couleur-primaire);
  color: white;
  border: none;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.slide-menu-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 200px;
  height: 100%;
  background: white;
  box-shadow: var(--ombre-lg);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  padding: 3rem 1rem 1rem;
  z-index: 15;
}

.slide-menu-trigger:checked ~ .slide-menu-panel {
  transform: translateX(0);
}

.slide-menu-panel a {
  display: block;
  padding: 0.6rem 0.75rem;
  color: var(--couleur-texte);
  text-decoration: none;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: background 0.2s ease;
}

.slide-menu-panel a:hover {
  background: #f1f5f9;
}

/* ---------- FADE IN/OUT ---------- */
.demo-fade {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.fade-example {
  text-align: center;
}

.fade-example .fade-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

.fade-box {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  border-radius: var(--rayon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.75rem;
}

.fade-in-box {
  background: var(--couleur-primaire);
  opacity: 0.3;
  transition: opacity 0.5s ease;
}

.fade-in-box:hover {
  opacity: 1;
}

.fade-out-box {
  background: var(--couleur-secondaire);
  opacity: 1;
  transition: opacity 0.5s ease;
}

.fade-out-box:hover {
  opacity: 0.2;
}

/* ---------- SCALE / ROTATE / COLOR MORPH ---------- */
.demo-transform-effects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.transform-example {
  text-align: center;
}

.transform-example .transform-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

.transform-box {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  border-radius: var(--rayon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.75rem;
  cursor: pointer;
}

.scale-box {
  background: var(--couleur-primaire);
  transition: transform 0.3s ease;
}

.scale-box:hover {
  transform: scale(1.2);
}

.rotate-box {
  background: var(--couleur-succes);
  transition: transform 0.5s ease;
}

.rotate-box:hover {
  transform: rotate(360deg);
}

.morph-box {
  background: #f97316;
  transition: background 0.5s ease, border-radius 0.5s ease;
}

.morph-box:hover {
  background: var(--couleur-secondaire);
  border-radius: 50%;
}

/* ---------- WILL-CHANGE DEMO ---------- */
.will-change-demo {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.wc-example {
  text-align: center;
}

.wc-example .wc-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--couleur-texte-clair);
  margin-bottom: 0.5rem;
}

.wc-box {
  width: 60px;
  height: 60px;
  margin: 0 auto;
  border-radius: var(--rayon);
  background: var(--couleur-primaire);
  transition: transform 0.3s ease;
  will-change: transform;
}

.wc-box:hover {
  transform: translateX(40px);
}

.wc-box-no-willchange {
  width: 60px;
  height: 60px;
  margin: 0 auto;
  border-radius: var(--rayon);
  background: var(--couleur-secondaire);
  transition: transform 0.3s ease;
}

.wc-box-no-willchange:hover {
  transform: translateX(40px);
}

/* ---------- PREFERS REDUCED MOTION DEMO ---------- */
.demo-reduced-motion {
  padding: 1.5rem;
  background: var(--couleur-blanc);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--rayon);
}

.reduced-motion-box {
  display: flex;
  gap: 2rem;
  align-items: center;
  justify-content: center;
}

.rm-animated {
  width: 80px;
  height: 80px;
  border-radius: var(--rayon);
  background: var(--couleur-primaire);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.75rem;
  transition: transform 0.5s ease;
  cursor: pointer;
}

.rm-animated:hover {
  transform: scale(1.3) rotate(10deg);
}

@media (prefers-reduced-motion: reduce) {
  .rm-animated {
    transition: none;
  }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
  .demo-button-effects,
  .demo-card-effects,
  .timing-viz,
  .demo-input-effects,
  .demo-transform-effects,
  .demo-fade,
  .will-change-demo {
    grid-template-columns: 1fr;
  }

  .demo-nav-underline .nav-animated {
    flex-direction: column;
  }
}