:root {
  --bg:        #0d0d0f;
  --surface:   #141417;
  --card:      #1a1a1f;
  --border:    #2a2a32;
  --accent:    #c8a96e;
  --accent2:   #7c6fcd;
  --text:      #e8e6e1;
  --muted:     #6b6a72;
  --success:   #4ead85;
  --danger:    #e06c6c;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Grain overlay ── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 9999; opacity: .4;
}

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(13,13,15,.85);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 100;
}

.logo { 
  display: flex; align-items: baseline; gap: .5rem;
  flex: 1; /* Pushes middle content */
}
.logo-name {
  font-family: 'DM Serif Display', serif;
  font-size: 1.35rem;
  color: var(--accent);
}
.logo-tag {
  font-family: 'DM Mono', monospace;
  font-size: .65rem;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: .15rem .45rem;
  border-radius: 3px;
}

.header-center { 
  display: flex; 
  justify-content: center; 
  flex: 2;
}

.header-right-placeholder {
  flex: 1;
}

/* ── Tab Switcher with Arrow ── */
.lib-switcher-wrap {
  position: relative;
  display: flex;
  align-items: center;
  max-width: 100%;
}

.lib-switcher {
  display: flex; gap: .5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .35rem;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-behavior: smooth;
}
.lib-switcher::-webkit-scrollbar { display: none; }

.lib-btn {
  background: none; border: none; cursor: pointer;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem; /* Bigger */
  color: var(--text); /* Changed from muted to light text */
  padding: 0.5rem 1.2rem; /* Bigger */
  border-radius: 8px;
  transition: all .2s;
  white-space: nowrap;
  opacity: 0.7;
}
.lib-btn.active {
  background: var(--card);
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--border);
  opacity: 1;
}
.lib-btn:hover { opacity: 1; }

.scroll-arrow {
  position: absolute;
  right: -10px;
  background: linear-gradient(to left, var(--bg) 40%, transparent);
  height: 100%;
  width: 50px;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  color: var(--accent);
  padding-right: 10px;
  animation: arrow-slide 2s infinite;
  z-index: 5;
}

@keyframes arrow-slide {
  0%, 100% { opacity: 0.2; transform: translateX(0); }
  50% { opacity: 1; transform: translateX(5px); }
}

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 3.5rem 2rem 6rem;
}

.hero { text-align: center; margin-bottom: 3rem; }
.hero h1 { font-family: 'DM Serif Display', serif; font-size: clamp(2rem, 5vw, 3rem); font-weight: 400; }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero p { margin-top: .9rem; font-size: .9rem; color: var(--muted); }

.search-wrap { position: relative; }
.search-box {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.4rem 1.1rem 3.4rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  line-height: 1.55;
}
.search-icon { position: absolute; left: 1.1rem; top: 1.15rem; color: var(--muted); }

.search-footer { display: flex; align-items: center; justify-content: space-between; margin-top: .8rem; }
.hint { font-family: 'DM Mono', monospace; font-size: .68rem; color: var(--muted); }

.search-btn {
  background: var(--accent);
  color: #1a1409;
  border: none; cursor: pointer;
  font-weight: 500;
  padding: .6rem 1.3rem;
  border-radius: 9px;
  transition: all .2s;
}

.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1rem;
  position: relative;
  overflow: hidden;
}
.result-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
}

.card-title { font-family: 'DM Serif Display', serif; font-size: 1.12rem; color: var(--text); }
.card-author { font-size: .78rem; color: var(--muted); margin-top: .2rem; }

.location-badge {
  display: inline-flex;
  padding: .28rem .7rem;
  border-radius: 20px;
  font-family: 'DM Mono', monospace;
  font-size: .68rem;
  background: rgba(200,169,110,.1);
  color: var(--accent);
  margin-right: 0.5rem;
}
.location-badge.mba { background: rgba(124,111,205,.1); color: var(--accent2); }

.filter-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  margin-top: 10px;
}

.details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 0.8rem;
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px dashed var(--border);
}

.ai-reply {
  background: rgba(200,169,110,0.05);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  font-style: italic;
  color: var(--accent);
}

footer {
  text-align: center;
  padding: 2rem;
  font-family: 'DM Mono', monospace;
  font-size: .65rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  opacity: .5;
}

@media (max-width: 1024px) {
  header { flex-direction: column; gap: 1.5rem; }
  .logo, .header-center, .header-right-placeholder { flex: none; width: 100%; justify-content: center; }
  .header-right-placeholder { display: none; }
}

.thinking {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 3rem 0;
  position: relative;
}

.thinking::after {
  content: 'System is working...';
  position: absolute;
  top: 2rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.8;
  letter-spacing: 0.05em;
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: bounce 0.6s infinite alternate;
}

@keyframes bounce {
  from { transform: translateY(0); opacity: 0.3; }
  to { transform: translateY(-8px); opacity: 1; }
}