:root{
  --bg-overlay: rgba(0,0,0,.55);
  --card: rgba(255,255,255,.10);
  --card-hover: rgba(255,255,255,.16);
  --text: #ffffff;
  --muted: rgba(255,255,255,.75);
  --border: rgba(255,255,255,.18);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1100px;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(0,0,0,.65) 0%, rgba(0,0,0,.35) 45%, rgba(0,0,0,.70) 100%),
    url("./assets/Taust.jpg") center/cover no-repeat fixed;
}

a{ color: inherit; text-decoration: none; }
.container{
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

header.topbar{
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(0,0,0,.35);
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.topbar-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 220px;
}
.brand img{
  width: 44px;
  height: 44px;
  object-fit: contain;
}
.brand .title{
  display:flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand .title strong{ font-size: 16px; letter-spacing:.2px; }
.brand .title span{ font-size: 12.5px; color: var(--muted); }

.nav-actions{
  display:flex;
  align-items:center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

select.category-select{
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background: rgba(255,255,255,.10);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 40px 10px 12px;
  border-radius: 999px;
  outline: none;
  box-shadow: none;
  cursor: pointer;
}
.select-wrap{
  position: relative;
  display:inline-flex;
  align-items:center;
}
.select-wrap:after{
  content: "▾";
  position: absolute;
  right: 14px;
  color: rgba(255,255,255,.85);
  pointer-events: none;
  font-size: 14px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.08);
  color: var(--text);
  cursor: pointer;
  transition: .18s ease;
  user-select: none;
  font-weight: 600;
  font-size: 13px;
}
.btn:hover{ background: rgba(255,255,255,.14); }
.btn:active{ transform: translateY(1px); }

.hero{
  padding: 52px 0 22px;
}
.hero h1{
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: .2px;
}
.hero p{
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 70ch;
  font-size: 15.5px;
  line-height: 1.55;
}

.grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 20px 0 60px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: .18s ease;
  backdrop-filter: blur(10px);
}
.card:hover{ background: var(--card-hover); transform: translateY(-2px); }
.card h3{ margin: 0 0 8px; font-size: 16px; }
.card p{ margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.5; }

.page{
  padding: 28px 0 80px;
}

.section{
  margin-top: 18px;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}
.section h2{
  margin: 0 0 10px;
  font-size: 20px;
}
.section p, .section li{
  color: var(--muted);
  line-height: 1.6;
  font-size: 14.5px;
}
.section ul{ margin: 10px 0 0 18px; }

.anchor-nav{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.anchor-nav a{
  display:inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.25);
  font-size: 13px;
  color: rgba(255,255,255,.92);
  transition: .18s ease;
}
.anchor-nav a:hover{ background: rgba(255,255,255,.10); }

.footer{
  padding: 18px 0 32px;
  color: rgba(255,255,255,.70);
  font-size: 13px;
  border-top: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
  backdrop-filter: blur(10px);
}
.footer .container{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.small{ font-size: 12.5px; color: rgba(255,255,255,.68); }

@media (max-width: 900px){
  .grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 620px){
  .brand{ min-width: unset; }
  .brand .title span{ display:none; }
  .grid{ grid-template-columns: 1fr; }
  .topbar-inner{ padding: 12px 0; }
}