* { box-sizing: border-box; }

body.index-page {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #efefef;
  color: #111;
}

.frame {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  border: 0;
  overflow: hidden;
  background: #d99599;
}

.page-fade { animation: fade-in 0.45s ease; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.shell-home {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 164px;
  background: #9d5357;
}

.hero-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 26px 50px 10px;
  background: url("Image/background_image.jpg") center / cover no-repeat;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(226, 160, 166, 0.58);
  z-index: 0;
}

.hero-stage > * {
  position: relative;
  z-index: 1;
}

.cover-entry {
  cursor: pointer;
  outline: none;
}

.cover-entry:focus-visible {
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.brand-icon {
  width: clamp(34px, 2.4vw, 46px);
  aspect-ratio: 1;
  object-fit: contain;
  object-position: center;
  border-radius: 6px;
  background: transparent;
  mix-blend-mode: screen;
  display: block;
}

.brand h1 {
  margin: 0;
  color: #111;
  font-size: clamp(22px, 2vw, 35px);
  font-weight: 800;
}

.index-main {
  margin-top: 28px;
  min-height: 350px;
  width: min(560px, 100%);
  display: flex;
  flex-direction: column;
}

.index-main h2 {
  margin: 0;
  max-width: 520px;
  color: #111;
  font-size: clamp(62px, 8.6vw, 82px);
  line-height: 1;
  font-weight: 900;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 5px;
  text-decoration: none;
  white-space: nowrap;
  color: #fff;
  background: #d67f84;
  font-weight: 800;
  transition: background-color 0.25s ease, transform 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  background: #e49da3;
  transform: translateY(-1px);
}

.index-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-top:auto;
}

.cover-action {
  width: 114px;
  padding: 8px 0;
  font-size: 15px;
}

.back-btn{
  width: 100px;
  padding: 8px 0;
  font-size: 15px;
}


.copyright {
  margin: auto 0 2px;
  text-align: center;
  color: #fff;
  font-size: clamp(12px, 1.1vw, 17px);
  font-weight: 800;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.side-menu {
  padding-top: 24px;
  min-height: 100vh;
  background: #9d5357;
}

.menu-item {
  display: block;
  margin-bottom: 3px;
  padding: 10px 8px;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  font-size: clamp(12px, 1vw, 14px);
  font-weight: 800;
  color: #fff;
  background: #d67f84;
  transition: background-color 0.25s ease;
}

.menu-item:hover,
.menu-item:focus-visible {
  background: #e49da3;
}


.art_gallery-btn{

    display:inline-flex;
    align-items:center;
    justify-content:center;

    min-width:170px;
    padding:10px 22px;

    background:#9d5357;
    color:#fff;

    text-decoration:none;
    font-size:15px;
    font-weight:800;

    border:2px solid #ffffff;
    border-radius:8px;

    box-shadow:0 6px 15px rgba(0,0,0,.18);

    transition:all .30s ease;

}

.art_gallery-btn:hover{

    background:#c97278;

    transform:translateY(-3px);

    box-shadow:0 10px 20px rgba(0,0,0,.28);

}

.art_gallery-btn:active{

    transform:scale(.96);

}

.art_gallery-btn::before{

    content:"🎨";
    margin-right:8px;
    font-size:18px;

}