:root{
  --bg: #f4f6fb;
  --card: #ffffff;
  --muted: #6b7280;
  --accent: #3751ff;
  --accent-2: #7b61ff;
  --success: #16a34a;
  --glass: rgba(255,255,255,0.6);
  --radius: 12px;
  --shadow: 0 6px 20px rgba(19,24,41,0.08);
  --chip-shadow: 0 4px 12px rgba(19,24,41,0.06);
}

*{
  box-sizing:border-box
}

html,body{
  height:100%
}

body{
  margin:0;
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:linear-gradient(180deg,var(--bg),#eef2ff 120%);
  color:#111827;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:28px;
}

/* Page container */
.page{
  max-width:980px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:20px;
}

/* Hero */
.hero{
  background: linear-gradient(90deg, rgba(55,81,255,0.12), rgba(123,97,255,0.06));
  border-radius: var(--radius);
  padding:18px 22px;
  box-shadow: var(--shadow);
}
.title{margin:0;font-size:20px}
.subtitle{margin:6px 0 0;color:var(--muted);font-size:13px}

/* Search panel */
.search-panel{
  background:var(--card);
  padding:18px;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.search-row{
  display:flex;
  gap:12px;
  align-items:center;
}
#searchInput{
  flex:1;
  padding:12px 14px;
  border-radius:10px;
  border:1px solid #e6e9f2;
  font-size:15px;
  background: linear-gradient(180deg,#fff,#fbfdff);
  outline: none;
  transition: box-shadow .12s ease, border-color .12s ease;
}
#searchInput:focus{box-shadow:0 6px 18px rgba(55,81,255,0.08);border-color:var(--accent)}

.btn-group{display:flex;gap:8px}
.btn{
  padding:10px 14px;
  border-radius:10px;
  border:1px solid transparent;
  background:transparent;
  cursor:pointer;
  font-weight:600;
  font-size:14px;
}
.btn.primary{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:white;
  box-shadow: 0 8px 20px rgba(55,81,255,0.16);
}
.btn.ghost{
  background:transparent;
  color:var(--muted);
  border:1px solid #eef2ff;
}

/* Alphabet */
.alphabet{
  margin-top:14px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  align-items:center;
}
.alphabet button{
  min-width:36px;
  height:36px;
  border-radius:8px;
  border:1px solid transparent;
  background:transparent;
  cursor:pointer;
  font-weight:600;
  color:var(--muted);
  transition: all .12s ease;
}
.alphabet button:hover{
  transform:translateY(-2px);
  color:var(--accent);
}
.alphabet button.active{
  background: linear-gradient(180deg, rgba(55,81,255,0.12), rgba(123,97,255,0.06));
  color:var(--accent);
  border: 1px solid rgba(55,81,255,0.08);
  box-shadow: 0 6px 18px rgba(55,81,255,0.06);
}

/* Results */
.results-section{min-height:120px}
.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.summary{color:var(--muted);font-size:14px}
.loading{color:var(--muted);font-size:14px}
.hidden{display:none}

.results{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:14px;
}
.card{
  background:var(--card);
  border-radius:10px;
  padding:14px;
  box-shadow:var(--shadow);
  border:1px solid #f2f4fb;
}
.card h3{margin:0 0 6px;font-size:16px}
.card p{margin:0 0 12px;color:#374151;font-size:14px;line-height:1.45}
.meta{display:flex;gap:8px;flex-wrap:wrap}
.chip{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  font-size:12px;
  background:#f8fafc;
  color:#0f172a;
  box-shadow:var(--chip-shadow);
  border:1px solid #eef2ff;
}

/* Highlighted search terms */
mark.highlight{
  background: linear-gradient(90deg, #fffae6, #fff1b8);
  padding:0 .2rem;
  border-radius:4px;
  color: #92400e;
}

/* No results */
.no-results{
  margin-top:14px;
  padding:12px;
  background:#fff8f9;
  border-radius:10px;
  color:#7f1d1d;
  border:1px solid #fde2e2;
}

/* Footer */
.footer{color:var(--muted);text-align:right;font-size:12px;margin-top:6px}

/* Accessibility helper */
.visually-hidden{
  position:absolute!important;
  height:1px;width:1px;overflow:hidden;
  clip:rect(1px,1px,1px,1px);white-space:nowrap;
}

/* Responsive tweaks */
@media (max-width:520px){
  .search-row{flex-direction:column; align-items:stretch}
  .btn-group{justify-content:flex-end}
}