/* ================= BLOCK: SPLIT SLIDER ================= */
.c-split-slider {
  position: relative;
  width: 100%;
  box-sizing: border-box;
  padding: var(--opt-d) var(--opr-d) var(--opb-d) var(--opl-d);
  background: var(--bg-val);
}

.c-split-slider * {
  box-sizing: border-box;
}

/* Global Container Max-Width */
.c-split-slider__max-width {
  max-width: var(--max-w);
  margin: 0 auto;
}

/* Inner Wrapper (White Box) */
.c-split-slider__wrap {
  display: flex;
  flex-direction: column;
  background: var(--wrap-bg-val);
  border-radius: var(--wrad-tl-d) var(--wrad-tr-d) var(--wrad-br-d) var(--wrad-bl-d);
  padding: var(--pt-d) var(--pr-d) var(--pb-d) var(--pl-d);
  box-shadow: var(--wrap-shad-d);
}

/* ================= 1. HEADER SECTION ================= */
.c-split-slider__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: var(--al-htxt-d);
  gap: 16px;
  margin-bottom: var(--gap-head-d);
}

.c-split-slider__h-tag {
  font-family: var(--ff-htg-d);
  font-size: var(--fs-htg-d);
  font-weight: var(--fw-htg-d);
  line-height: var(--lh-htg-d);
  color: var(--c-htag);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.c-split-slider__h-tit {
  font-family: var(--ff-hti-d);
  font-size: var(--fs-hti-d);
  font-weight: var(--fw-hti-d);
  line-height: var(--lh-hti-d);
  color: var(--c-htit);
  margin: 0;
}
.c-split-slider__h-tit em {
  font-family: var(--font-secondary);
  font-weight: 400;
  font-style: italic;
  font-size: inherit;
  line-height: inherit;
  letter-spacing: inherit;
  color: inherit;
}

/* Button */
.c-split-slider__btn {
  align-self: var(--b-as-d);
  width: var(--b-w-d);
  justify-content: var(--b-jc-d);
  
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: 800px;
  background-color: var(--c-bbg);
  color: var(--c-btxt);
  border: 1px solid var(--c-bbor);
  font-family: var(--ff-btn-d);
  font-size: var(--fs-btn-d);
  font-weight: var(--fw-btn-d);
  line-height: var(--lh-btn-d);
  text-decoration: none;
  transition: all 0.3s ease;
  flex-shrink: 0;
  text-align: center;
}
.c-split-slider__btn:hover { background-color: var(--c-bbg-h); color: var(--c-btxt-h); border-color: var(--c-bbor-h); }
.c-split-slider__btn:focus-visible { background-color: var(--c-bbg-f); color: var(--c-btxt-f); border-color: var(--c-bbor-f); outline: none; }
.c-split-slider__btn:focus:not(:focus-visible) { outline: none; }


/* ================= DESKTOP INTERACTIVE LAYOUT ================= */
.c-split-slider__desk {
  display: grid;
  grid-template-columns: var(--gc-l) var(--gc-c) var(--gc-r);
  gap: var(--gap-grid-d);
  align-items: var(--al-v-d);
}

/* Left Column (Nav) */
.c-split-slider__desk-nav-col {
  display: flex;
  flex-direction: column;
  gap: var(--gap-list-d);
  padding: var(--pad-col-l-d);
}

.c-split-slider__desk-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-items-d);
  position: relative;
  z-index: 2;
}

.c-split-slider__desk-nav-item {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px 0 8px;
  cursor: pointer;
}
.c-split-slider__desk-nav-item:first-child {
  padding-top: 0;
}

.c-split-slider__desk-nav-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translateX(0);
  opacity: 0.4;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease;
}

/* Hover State */
.c-split-slider__desk-nav-item:hover .c-split-slider__desk-nav-inner {
  opacity: 0.8;
}

/* Active Nav State */
.c-split-slider__desk-nav-item.is-active .c-split-slider__desk-nav-inner {
  transform: translateX(var(--nav-move));
  opacity: 1;
}

/* Keyboard Focus State */
.c-split-slider__desk-nav-item:focus-visible {
  outline: 2px solid var(--c-line-ac);
  outline-offset: 4px;
  border-radius: 4px;
}
.c-split-slider__desk-nav-item:focus:not(:focus-visible) {
  outline: none;
}

/* Nav Typography */
.c-split-slider__nav-num {
  font-family: var(--ff-cnu-d);
  font-size: var(--fs-cnu-d);
  font-weight: var(--fw-cnu-d);
  line-height: var(--lh-cnu-d);
  color: var(--c-num-ac);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.c-split-slider__nav-tit {
  font-family: var(--ff-cti-d);
  font-size: var(--fs-cti-d);
  font-weight: var(--fw-cti-d);
  line-height: var(--lh-cti-d);
  color: var(--c-tit-ac);
  margin: 0;
}

/* Overlay Line */
.c-split-slider__desk-nav-item::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 1px;
  width: 100%;
  background-color: var(--c-line-ac);
  opacity: 0.4;
  z-index: 5;
}

.c-split-slider__desk-nav-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 1px;
  width: 0;
  background-color: var(--c-line-ac);
  transition: width 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 10;
}
.c-split-slider__desk-nav-item.is-active::after {
  width: calc(100% + var(--gap-grid-d) + var(--gap-line-w));
}


/* Center Column (Images) */
.c-split-slider__desk-img-col {
  position: relative;
  width: 100%;
  aspect-ratio: var(--img-r-d);
  z-index: 1;
  padding: var(--pad-col-c-d);
}

.c-split-slider__desk-img-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.c-split-slider__desk-img-wrap.is-active {
  opacity: 1;
  visibility: visible;
  position: relative; 
}
.c-split-slider__desk-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--rad-d);
}


/* Right Column (Description) */
.c-split-slider__desk-desc-col {
  position: relative;
  width: 100%;
  padding: var(--pad-col-r-d);
}

.c-split-slider__desk-desc-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
  
  font-family: var(--ff-cde-d);
  font-size: var(--fs-cde-d);
  font-weight: var(--fw-cde-d);
  line-height: var(--lh-cde-d);
  color: var(--c-desc);
}
.c-split-slider__desk-desc-wrap.is-active {
  opacity: 1;
  visibility: visible;
  position: relative;
}
.c-split-slider__desk-desc-wrap p { margin: 0 0 16px 0; }
.c-split-slider__desk-desc-wrap p:last-child { margin-bottom: 0; }


.c-split-slider__mob { display: none; }


/* ================= TABLET (<= 1024px) ================= */
@media (max-width: 1024px) {
  .c-split-slider { padding: var(--opt-t) var(--opr-t) var(--opb-t) var(--opl-t); }
  
  .c-split-slider__wrap { 
    border-radius: var(--wrad-tl-t) var(--wrad-tr-t) var(--wrad-br-t) var(--wrad-bl-t);
    padding: var(--pt-t) var(--pr-t) var(--pb-t) var(--pl-t); 
    box-shadow: var(--wrap-shad-t);
  }
  
  .c-split-slider__header { 
    margin-bottom: var(--gap-head-t); 
    text-align: var(--al-htxt-t);
  }

  .c-split-slider__btn {
    align-self: var(--b-as-t); width: var(--b-w-t); justify-content: var(--b-jc-t);
  }
  
  .c-split-slider__desk {
    gap: var(--gap-grid-t);
    align-items: var(--al-v-t);
  }

  .c-split-slider__desk-nav-col {
    gap: var(--gap-list-t);
    padding: var(--pad-col-l-t);
  }

  .c-split-slider__desk-nav-list { gap: var(--gap-items-t); }
  
  .c-split-slider__desk-nav-item.is-active::after {
    width: calc(100% + var(--gap-grid-t) + var(--gap-line-w));
  }

  .c-split-slider__desk-img-col { aspect-ratio: var(--img-r-t); padding: var(--pad-col-c-t); }
  .c-split-slider__desk-img-wrap img { border-radius: var(--rad-t); }

  .c-split-slider__desk-desc-col { padding: var(--pad-col-r-t); }
}


/* ================= MOBILE (<= 768px) ================= */
@media (max-width: 768px) {
  .c-split-slider { padding: var(--opt-m) var(--opr-m) var(--opb-m) var(--opl-m); }
  
  .c-split-slider__wrap { 
    border-radius: var(--wrad-tl-m) var(--wrad-tr-m) var(--wrad-br-m) var(--wrad-bl-m);
    padding: var(--pt-m) var(--pr-m) var(--pb-m) var(--pl-m); 
    box-shadow: var(--wrap-shad-m);
  }
  
  .c-split-slider__header { 
    margin-bottom: var(--gap-head-m); 
    text-align: var(--al-htxt-m);
  }

  .c-split-slider__h-tag { font-family: var(--ff-htg-m); font-size: var(--fs-htg-m); font-weight: var(--fw-htg-m); line-height: var(--lh-htg-m); }
  .c-split-slider__h-tit { font-family: var(--ff-hti-m); font-size: var(--fs-hti-m); font-weight: var(--fw-hti-m); line-height: var(--lh-hti-m); }

  .c-split-slider__desk { display: none; }
  
  .c-split-slider__mob { 
    display: flex;
    flex-direction: column;
    gap: var(--gap-mb-m);
    padding: var(--pad-col-m);
  }

  .c-split-slider__mob-item {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  /* Keyboard Focus (Mobile Stacked Items) */
  .c-split-slider__mob-item:focus-visible {
    outline: 2px solid var(--c-tit-ac);
    outline-offset: 8px;
    border-radius: 8px;
  }
  .c-split-slider__mob-item:focus:not(:focus-visible) {
    outline: none;
  }

  .c-split-slider__mob-img-wrap {
    width: 100%;
    aspect-ratio: var(--img-r-m);
  }
  .c-split-slider__mob-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--rad-m);
  }

  .c-split-slider__mob-content {
    display: flex;
    flex-direction: column;
    gap: var(--gap-int-m);
  }

  .c-split-slider__nav-num {
    font-family: var(--ff-cnu-m); font-size: var(--fs-cnu-m); font-weight: var(--fw-cnu-m); line-height: var(--lh-cnu-m);
    color: var(--c-num-ac);
  }

  .c-split-slider__nav-tit {
    font-family: var(--ff-cti-m); font-size: var(--fs-cti-m); font-weight: var(--fw-cti-m); line-height: var(--lh-cti-m);
    color: var(--c-tit-ac);
    margin: 0;
  }

  .c-split-slider__mob-desc {
    font-family: var(--ff-cde-m); font-size: var(--fs-cde-m); font-weight: var(--fw-cde-m); line-height: var(--lh-cde-m);
    color: var(--c-desc);
  }
  .c-split-slider__mob-desc p { margin: 0 0 12px 0; }
  .c-split-slider__mob-desc p:last-child { margin-bottom: 0; }

  .c-split-slider__mob-btn-wrap {
    margin-top: var(--btn-mt-m);
    display: flex;
    justify-content: center;
  }

  .c-split-slider__btn {
    align-self: var(--b-as-m); width: var(--b-w-m); justify-content: var(--b-jc-m);
    font-family: var(--ff-btn-m); font-size: var(--fs-btn-m); font-weight: var(--fw-btn-m); line-height: var(--lh-btn-m);
  }
}