:root{
  --bg1:#0b1220;
  --bg2:#0e2a47;
  --panel:rgba(255,255,255,0.08);
  --panel2:rgba(255,255,255,0.06);
  --text:#e9eef7;
  --muted:rgba(233,238,247,0.7);
  --accent:#7dd3fc;
  --accent2:#a78bfa;
  --border:rgba(255,255,255,0.12);
  --shadow: 0 12px 30px rgba(0,0,0,0.35);
  --radius:16px;
  --radius2:12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--text);
  background: url("./bg.svg") center/cover no-repeat fixed;
}

/* -----------------------------
   Password gate
   ----------------------------- */
body.locked{ overflow:hidden; }
body.locked .app{
  filter: blur(8px) saturate(0.9);
  pointer-events:none;
  user-select:none;
}

.authOverlay{
  position:fixed;
  inset:0;
  z-index: 9999;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 22px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(10px);
}
body:not(.locked) .authOverlay{ display:none; }

.authCard{
  width: min(520px, 92vw);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.16);
  background: linear-gradient(135deg, rgba(125,211,252,0.14), rgba(167,139,250,0.10));
  box-shadow: var(--shadow);
  padding: 18px 18px 16px 18px;
}
.authTitle{
  font-weight: 850;
  letter-spacing: 0.2px;
  font-size: 18px;
  margin-bottom: 6px;
}
.authSub{
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 14px;
  line-height: 1.35;
}
.authRow{
  display:flex;
  gap: 10px;
}
.authInput{
  flex: 1;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.18);
  outline: none;
  background: rgba(0,0,0,0.18);
  color: var(--text);
}
.authInput::placeholder{ color: rgba(233,238,247,0.55); }
.authInput.error{ border-color: rgba(248,113,113,0.9); box-shadow: 0 0 0 3px rgba(248,113,113,0.15); }

.authBtn{
  flex: 0 0 auto;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(125,211,252,0.18);
  color: var(--text);
  font-weight: 750;
  cursor: pointer;
  transition: transform .06s ease, background .12s ease, border-color .12s ease;
}
.authBtn:hover{ transform: translateY(-1px); background: rgba(125,211,252,0.24); border-color: rgba(125,211,252,0.40); }
.authBtn:active{ transform: translateY(0px); }

.authError{
  min-height: 18px;
  margin-top: 10px;
  color: rgba(248,113,113,0.95);
  font-size: 12.5px;
}

.authCard.shake{ animation: authShake 0.35s linear; }
@keyframes authShake{
  0%{ transform: translateX(0); }
  25%{ transform: translateX(-6px); }
  50%{ transform: translateX(6px); }
  75%{ transform: translateX(-4px); }
  100%{ transform: translateX(0); }
}
a{color:inherit}
.app{
  display:flex;
  min-height:100vh;
  backdrop-filter: blur(6px);
}
.sidebar{
  width:320px;
  padding:18px 14px;
  border-right:1px solid var(--border);
  background: linear-gradient(180deg, rgba(0,0,0,0.30), rgba(0,0,0,0.18));
}
.brand{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:14px 14px 10px 14px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(125,211,252,0.18), rgba(167,139,250,0.10));
  border:1px solid rgba(255,255,255,0.14);
  box-shadow: var(--shadow);
}
.brandRow{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.brand .title{
  font-weight:750;
  letter-spacing:0.2px;
  font-size:18px;
}
.closeMenuBtn{
  display:none;
  width:36px;
  height:36px;
  border-radius: 12px;
  border:1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.18);
  color: var(--text);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  align-items:center;
  justify-content:center;
  transition: transform .06s ease, background .12s ease, border-color .12s ease;
}
.closeMenuBtn:hover{ transform: translateY(-1px); background: rgba(0,0,0,0.26); border-color: rgba(255,255,255,0.22); }
.closeMenuBtn:active{ transform: translateY(0px); }
.brand .subtitle{
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
}
.subjects{
  margin-top:12px;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.subjectBtn{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  padding:12px 12px;
  border-radius: var(--radius2);
  border:1px solid var(--border);
  background: rgba(255,255,255,0.06);
  cursor:pointer;
  transition: transform .06s ease, background .12s ease, border-color .12s ease;
}
.subjectBtn:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.085); border-color: rgba(255,255,255,0.18); }
.subjectBtn.active{ background: linear-gradient(135deg, rgba(125,211,252,0.16), rgba(167,139,250,0.12)); border-color: rgba(255,255,255,0.22); }
.subjectBtn .left{display:flex; flex-direction:column; gap:3px; min-width:0}
.subjectBtn .code{font-family:var(--mono); color:rgba(233,238,247,0.85); font-size:12px}
.subjectBtn .name{font-weight:650; font-size:14px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.badge{
  font-family:var(--mono);
  font-size:12px;
  padding:6px 8px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.25);
  color:rgba(233,238,247,0.85);
}
.main{
  flex:1;
  padding:18px 18px 28px 18px;
}
.topbar{
  display:flex;
  gap:14px;
  align-items:center;
  justify-content:space-between;
  flex-wrap: wrap;
  padding:14px 14px;
  border-radius: var(--radius);
  border:1px solid var(--border);
  background: rgba(0,0,0,0.22);
  box-shadow: var(--shadow);
  position: sticky;
  top: 12px;
  z-index: 20;
}
.topLeft{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
  flex: 1 1 auto;
}
.menuBtn{
  display:none;
  width:40px;
  height:40px;
  border-radius: 12px;
  border:1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition: transform .06s ease, background .12s ease, border-color .12s ease;
}
.menuBtn:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.085); border-color: rgba(255,255,255,0.22); }
.menuBtn:active{ transform: translateY(0px); }
.menuIcon{
  width:18px;
  height:2px;
  background: rgba(233,238,247,0.92);
  border-radius: 2px;
  position: relative;
}
.menuIcon::before,
.menuIcon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background: rgba(233,238,247,0.92);
  border-radius: 2px;
}
.menuIcon::before{ top:-6px; }
.menuIcon::after{ top:6px; }

.scrim{
  display:none;
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(2px);
}
.breadcrumb{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:0;
}
.breadcrumb .where{ color: var(--muted); font-size:12px; }
.breadcrumb .what{ font-weight:750; font-size:16px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.searchWrap{ flex: 0 0 min(520px, 55vw); display:flex; gap:10px; align-items:center; }
.searchWrap input{
  width:100%;
  padding:12px 12px;
  border-radius: 12px;
  border:1px solid rgba(255,255,255,0.16);
  outline:none;
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.searchWrap input::placeholder{ color: rgba(233,238,247,0.55); }
.sectionChips{
  margin-top: 14px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  user-select:none;
  cursor:pointer;
  padding:8px 10px;
  border-radius: 999px;
  border:1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.05);
  color: rgba(233,238,247,0.9);
  font-size: 12.5px;
}
.chip:hover{ background: rgba(255,255,255,0.075); border-color: rgba(255,255,255,0.18); }
.chip.active{ background: rgba(125,211,252,0.18); border-color: rgba(125,211,252,0.40); }
.stats{
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}
.results{
  margin-top: 14px;
  display:flex;
  flex-direction:column;
  gap: 14px;
}
.sectionBlock{
  border:1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(0,0,0,0.18);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.sectionHeader{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  border-bottom:1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
}
.sectionHeader .secCode{
  font-family: var(--mono);
  color: rgba(233,238,247,0.86);
  font-size: 12.5px;
}
.sectionHeader .secTitle{
  font-weight: 800;
  letter-spacing: 0.2px;
}
.qaList{ padding: 10px 12px 12px 12px; display:flex; flex-direction:column; gap:10px; }
.qa{
  border:1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: rgba(255,255,255,0.05);
  padding: 10px 12px;
}
.qid{
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(233,238,247,0.72);
  margin-bottom: 6px;
}
.q{
  font-weight: 650;
  line-height: 1.35;
}
.a{
  margin-top: 8px;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px dashed rgba(125,211,252,0.35);
  background: rgba(125,211,252,0.08);
  color: rgba(233,238,247,0.92);
  line-height: 1.35;
}
mark{
  background: rgba(167,139,250,0.35);
  color: var(--text);
  padding: 0 2px;
  border-radius: 4px;
}
.empty{
  border:1px dashed rgba(255,255,255,0.22);
  border-radius: var(--radius);
  padding: 18px;
  background: rgba(0,0,0,0.16);
  color: rgba(233,238,247,0.8);
}
.footerNote{
  margin-top: 16px;
  color: rgba(233,238,247,0.55);
  font-size: 12px;
}
@media (max-width: 980px){
  .app{ display:block; }

  /* Mobile nav drawer (sidebar) */
  .sidebar{
    display:block;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 88vw);
    transform: translateX(-105%);
    transition: transform 0.18s ease;
    z-index: 60;
    overflow-y: auto;
  }
  body.nav-open .sidebar{ transform: translateX(0); }
  body.nav-open .scrim{ display:block; }
  body.nav-open{ overflow:hidden; }

  .menuBtn{ display:inline-flex; }
  .closeMenuBtn{ display:inline-flex; }

  .main{ padding: 12px; }
  .topbar{ top: 0; border-radius: 0; }
  .searchWrap{ flex: 1 1 100%; max-width: none; }
}