:root{
  --bg0:#0b1024;
  --bg1:#0f1632;
  --border:rgba(255,255,255,.12);
  --border2:rgba(255,255,255,.18);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.72);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 16px;
  --radius2: 20px;
  --gap: 14px;
  --max: 1180px;
  --inputBg: rgba(18,27,60,.65);
  --chipBg: rgba(255,255,255,.06);
  --danger: rgba(255,100,100,.9);
}

*{ 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-color: var(--bg0);
  position: relative;
}

/* Decorative top-only gradient layer that scales with viewport */
body::before{
  content: "";
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  height: 36vh; /* only cover the top portion */
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(40% 30vh at 8% 10%, rgba(37,91,227,.30) 0%, rgba(37,91,227,.12) 30%, transparent 60%),
    radial-gradient(35% 28vh at 92% 8%, rgba(160,90,255,.20) 0%, rgba(160,90,255,.08) 30%, transparent 60%),
    linear-gradient(180deg, rgba(0,0,0,0.06), transparent 40%);
  background-repeat: no-repeat, no-repeat, no-repeat;
  background-size: 100vw 30vh, 100vw 28vh, 100% 36vh; /* Ensure gradient spans full viewport width */
  background-position: 0 0, 0 0, 0 0; /* Align gradients to the top-left */
}

@media (max-width: 640px){
  body::before{ height: 28vh; background-size: 100vw 28vh, 100vw 24vh, 100% 28vh; /* Adjust for smaller screens */ }
}

a{ color:inherit; text-decoration:none; }
a:hover{ text-decoration: underline; }

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible{
  outline: 2px solid rgba(255,255,255,.85);
  outline-offset: 3px;
  border-radius: 10px;
}

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(11,16,36,.85), rgba(11,16,36,.55));
  border-bottom: 1px solid var(--border);
}

.header-inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 14px;
  display:flex;
  gap: 12px;
  align-items:center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.home{
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display:grid;
  place-items:center;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  box-shadow: var(--shadow);
  flex: 0 0 auto;
}

.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 240px;
}
.brand-mark{
  width: 38px; height: 38px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.18);
  flex: 0 0 auto;
  object-fit: contain;
  background: rgba(255,255,255,.08);
  padding: 4px;
}
.brand-text h1{
  font-size: 18px;
  line-height: 1.1;
  margin: 0;
  letter-spacing: .2px;
}
.brand-text p{
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.toolbar{
  display:flex;
  gap: 10px;
  align-items:center;
  flex: 1 1 380px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.search{
  position: relative;
  flex: 1 1 360px;
  max-width: 560px;
}
.search input[type="search"]{
  width: 100%;
  padding: 11px 44px 11px 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--inputBg);
  color: var(--text);
  box-shadow: 0 8px 18px rgba(0,0,0,.18);
}
.search input::placeholder{ color: rgba(255,255,255,.55); }

.search .icon{
  position:absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  opacity: .75;
  font-size: 16px;
  user-select:none;
  pointer-events: none;
}

.search .search-clear,
.search #search-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: rgba(255,255,255,.70);
  font-size: 16px;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 8px;
  transition: background .12s ease, color .12s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.search .search-clear:hover,
.search #search-clear:hover {
  background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.92);
}

.search .search-clear:focus-visible,
.search #search-clear:focus-visible {
  outline: 2px solid rgba(255,255,255,.30);
  outline-offset: 2px;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(18,27,60,.55);
  color: var(--muted);
  white-space: nowrap;
  user-select:none;
}
.pill b{ color: var(--text); font-weight: 600; }

/* Layout wrappers */
.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 14px 44px;
}

.hero{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: var(--gap);
  align-items: stretch;
  margin-bottom: var(--gap);
}
.hero-card{
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(18,27,60,.78), rgba(15,23,54,.62));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 14px;
}
.hero-card h2{ margin: 0 0 8px; font-size: 18px; }
.hero-card h3{ margin: 0 0 8px; font-size: 14px; color: var(--text); }
.hero-card p{ margin: 0 0 10px; line-height: 1.55; color: rgba(255,255,255,.82); }

.layout{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--gap);
  align-items:start;
}

@media (max-width: 1200px){
  .layout{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px){
  .layout, .hero{ grid-template-columns: 1fr; }
  .toolbar{ justify-content: stretch; }
  .search{ max-width: 100%; }
}

/* Cards */
.card{
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(18,27,60,.78), rgba(15,23,54,.62));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow:hidden;
}

.card + .card{ margin-top: var(--gap); }

.card-head{
  padding: 14px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.card-title{
  display:flex;
  flex-direction: column;
  gap: 2px;
  min-width:0;
}
.card-title h2{
  margin:0;
  font-size: 14px;
  letter-spacing: .2px;
}
.card-title span{
  font-size: 12px;
  color: var(--muted);
}

.card-body{ padding: 14px; }

.actions{ display:flex; gap: 8px; align-items:center; }

/* Collapsible details */
details{ border: none; }

details summary{
  padding: 14px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

details summary::-webkit-details-marker{ display: none; }

details summary:hover{
  background: rgba(255,255,255,.03);
}

details .chev{
  transition: transform .2s ease;
  font-size: 20px;
  opacity: .75;
}

details[open] .chev{
  transform: rotate(180deg);
}

details .card-body{
  border-bottom: none;
}

details .card-body ul{
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Nested/multi-level cards for sub-categories */
.card .card {
  margin: 8px 0;
  background: rgba(18,27,60,.45);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
}

.card .card .card-title h2 {
  font-size: 13px;
  font-weight: 600;
}

.card .card .card-title span {
  font-size: 11px;
}

.card .card .card-head {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255,255,255,.05);
}

.card .card .card-body {
  padding: 10px 12px;
}

/* Triple-nested sub-sub-categories */
.card .card .card {
  background: rgba(18,27,60,.3);
  border-color: rgba(255,255,255,.06);
  margin: 6px 0;
}

.card .card .card .card-title h2 {
  font-size: 12px;
  font-weight: 500;
}

.card .card .card .card-title span {
  font-size: 10px;
}

.card .card .card .card-head {
  padding: 8px 10px;
}

.card .card .card .card-body {
  padding: 8px 10px;
}

details .card-body .item{
  margin: 0;
}

details .card-body .item a{
  display: flex;
  gap: 10px;
  align-items: center;
  text-decoration: none;
}

details .card-body .item a:hover{
  text-decoration: none;
}

details .card-body .item img{
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
  flex: 0 0 auto;
}

/* Forms */
.form-row{
  display:grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  align-items:center;
}
.form-row:last-child{ border-bottom: none; }
.label{ color: rgba(255,255,255,.82); font-size: 13px; }

input[type="text"], input[type="search"], select{
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--inputBg);
  color: var(--text);
  box-shadow: 0 8px 18px rgba(0,0,0,.12);
}

/* Buttons */
.btn{
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .12s ease, border-color .12s ease, background .12s ease, color .12s ease;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
}
.btn:hover{
  transform: translateY(-1px);
  border-color: rgba(255,255,255,.22);
  background: rgba(255,255,255,.08);
}
.btn.primary{
  border-color: rgba(37,91,227,.55);
  background: linear-gradient(135deg, rgba(37,91,227,.35), rgba(160,90,255,.22));
}
.btn.danger{
  border-color: rgba(255,120,120,.35);
  background: rgba(255,120,120,.08);
}
.btn.small{
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
}

/* Utility blocks */
.stack{ display:flex; gap: 10px; flex-wrap: wrap; }
.muted{ color: var(--muted); }

.hint{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  border-radius: 14px;
  padding: 10px 12px;
  color: rgba(255,255,255,.82);
  margin-top: 10px;
}
.hint b{ color: var(--text); }
.hint.warn{ border-color: rgba(255,120,120,.25); }
.hint.warn b{ color: var(--danger); }

.chip{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--chipBg);
  color: var(--muted);
  user-select:none;
  margin-right: 8px;
  margin-bottom: 8px;
}
.chip b{ color: var(--text); font-weight: 600; }

/* Items (cards in a grid) */
.grid-cards{
  margin-top: 12px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
}
@media (max-width: 980px){
  .grid-cards{ grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 640px){
  .grid-cards{ grid-template-columns: 1fr; }
  .form-row{ grid-template-columns: 1fr; }
  .btn{ width: 100%; }
}

.item{
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.05);
  padding: 10px;
  display:flex;
  gap: 10px;
  align-items:flex-start;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.item:hover{
  transform: translateY(-1px);
  border-color: rgba(255,255,255,.22);
  background: rgba(255,255,255,.07);
}
.item-icon{
  width: 28px;
  height: 28px;
  border-radius: 10px;
  display:grid;
  place-items:center;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  flex: 0 0 auto;
}
.txt{ min-width:0; display:flex; flex-direction: column; gap: 2px; }
.name{ font-size: 13px; line-height: 1.25; word-break: break-word; }
.meta{ font-size: 12px; color: var(--muted); }

/* Tables */
.simple-table{
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  overflow:hidden;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
}
.simple-table th, .simple-table td{
  padding: 10px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  vertical-align: top;
  text-align: left;
  font-size: 13px;
  color: rgba(255,255,255,.82);
}
.simple-table th{
  color: var(--text);
  background: rgba(255,255,255,.05);
  font-weight: 600;
}
.simple-table tr:last-child td{ border-bottom: none; }

/* Lists */
.list{
  margin: 12px 0 0;
  padding-left: 18px;
  color: rgba(255,255,255,.82);
}
.list li{ margin: 6px 0; }
.list a{ color: rgba(255,255,255,.92); }

.footer{
  margin-top: 20px;
  padding: 12px 0 0;
  border-top: 1px solid rgba(255,255,255,.10);
  text-align: center;
}

/* Blog post figure caption styling */
.post-card figure{
  margin: 12px 0;
  text-align: center;
}
.post-card figure img{
  max-width: 520px;
  width: auto;
  display: block;
  margin: 0 auto;
  border-radius: 12px;
}
.post-card figure figcaption{
  margin-top: 6px;
  color: var(--muted);
  font-style: italic;
  font-size: 13px;
  text-align: center;
}

/* Motion */
@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior: auto !important; transition:none !important; }
}