*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#1a1a2e;
  --bg-surface:#16213e;
  --bg-card:#0f3460;
  --accent:#00d4aa;
  --accent-dim:rgba(0,212,170,.15);
  --text:#e8e8e8;
  --text-dim:#8888aa;
  --danger:#ff4757;
  --success:#2ed573;
  --radius:12px;
  --safe-bottom:env(safe-area-inset-bottom,0px);
}
html,body{
  height:100%;
  width:100%;
  overflow:hidden;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  font-size:15px;
  -webkit-tap-highlight-color:transparent;
  -webkit-text-size-adjust:100%;
}
::-webkit-scrollbar{display:none}
body{scrollbar-width:none}

/* ── Status Bar ── */
#status-bar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;justify-content:space-between;align-items:center;
  padding:6px 16px;
  background:rgba(26,26,46,.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(0,212,170,.1);
  font-size:12px;
  padding-top:max(6px,env(safe-area-inset-top));
}
.status-left{display:flex;align-items:center;gap:8px}
.status-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--danger);
  transition:background .3s;
}
.status-dot.connected{background:var(--success)}
.status-right{color:var(--text-dim)}

/* ── Views ── */
.view{display:none;width:100%;height:100%}
.view.active{display:flex;flex-direction:column}

/* ── Camera View ── */
#view-camera{position:relative;overflow:hidden}
#camera-feed{
  width:100%;height:100%;object-fit:cover;
  background:#000;
}
#camera-overlay{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;
}
#scan-frame{
  width:280px;height:140px;
  position:relative;
}
.corner{
  position:absolute;width:28px;height:28px;
  border-color:var(--accent);border-style:solid;border-width:0;
}
.corner.tl{top:0;left:0;border-top-width:3px;border-left-width:3px;border-radius:4px 0 0 0}
.corner.tr{top:0;right:0;border-top-width:3px;border-right-width:3px;border-radius:0 4px 0 0}
.corner.bl{bottom:0;left:0;border-bottom-width:3px;border-left-width:3px;border-radius:0 0 0 4px}
.corner.br{bottom:0;right:0;border-bottom-width:3px;border-right-width:3px;border-radius:0 0 4px 0}

/* ── Scan Button ── */
#scan-btn{
  position:fixed;bottom:calc(70px + var(--safe-bottom));left:50%;
  transform:translateX(-50%);
  width:68px;height:68px;border-radius:50%;border:none;
  background:var(--accent);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 30px rgba(0,212,170,.45),0 4px 20px rgba(0,0,0,.5);
  cursor:pointer;z-index:50;
  transition:transform .15s,box-shadow .15s;
}
#scan-btn:active{transform:translateX(-50%) scale(.92);box-shadow:0 0 15px rgba(0,212,170,.3)}
#scan-btn.processing{animation:pulse-ring 1.2s ease-in-out infinite}
@keyframes pulse-ring{
  0%{box-shadow:0 0 0 0 rgba(0,212,170,.5)}
  70%{box-shadow:0 0 0 18px rgba(0,212,170,0)}
  100%{box-shadow:0 0 0 0 rgba(0,212,170,0)}
}

/* ── Loading ── */
#scanner-loading{
  position:absolute;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:rgba(26,26,46,.7);
  backdrop-filter:blur(4px);z-index:40;
}
#scanner-loading.hidden{display:none}
.spinner{
  width:44px;height:44px;
  border:4px solid rgba(0,212,170,.2);
  border-top-color:var(--accent);
  border-radius:50%;
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
#loading-text{margin-top:14px;font-size:14px;color:var(--text-dim)}

/* ── Bottom Sheet ── */
.bottom-sheet{
  position:fixed;bottom:0;left:0;right:0;
  background:rgba(22,33,62,.92);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-radius:var(--radius) var(--radius) 0 0;
  padding:0 20px calc(80px + var(--safe-bottom)) 20px;
  max-height:55vh;overflow-y:auto;
  transform:translateY(100%);
  transition:transform .35s cubic-bezier(.4,0,.2,1);
  z-index:60;
  box-shadow:0 -8px 40px rgba(0,0,0,.5);
}
.bottom-sheet.visible{transform:translateY(0)}
.bottom-sheet.hidden{transform:translateY(100%)}
.sheet-handle{
  width:40px;height:4px;
  background:rgba(255,255,255,.2);border-radius:2px;
  margin:12px auto 16px;cursor:pointer;
}
.reg-display{
  font-size:26px;font-weight:700;letter-spacing:2px;
  color:var(--accent);text-align:center;
  margin-bottom:18px;
}
.detail-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;
}
.detail-item{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(0,212,170,.08);
  border-radius:8px;padding:10px 12px;
}
.detail-item .label{
  display:block;font-size:11px;text-transform:uppercase;
  letter-spacing:.5px;color:var(--text-dim);margin-bottom:3px;
}
.detail-item .value{
  display:block;font-size:15px;font-weight:600;color:var(--text);
}

/* ── No Camera ── */
#no-camera{
  position:absolute;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:40px;text-align:center;color:var(--text-dim);gap:12px;
}
#no-camera.hidden{display:none}

/* ── Tab Bar ── */
#tab-bar{
  position:fixed;bottom:0;left:0;right:0;
  display:flex;justify-content:space-around;
  background:rgba(26,26,46,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-top:1px solid rgba(255,255,255,.06);
  padding-bottom:var(--safe-bottom);
  z-index:80;
}
.tab{
  flex:1;display:flex;flex-direction:column;align-items:center;
  gap:3px;padding:10px 0 8px;
  background:none;border:none;color:var(--text-dim);
  font-size:10px;cursor:pointer;
  transition:color .2s;
}
.tab.active{color:var(--accent)}
.tab span{letter-spacing:.3px}

/* ── History ── */
#view-history,#view-stats{
  padding-top:44px;padding-bottom:calc(56px + var(--safe-bottom));
}
.view-header{
  padding:14px 20px 10px;
}
.view-header h2{font-size:20px;font-weight:700}
.scroll-list{
  flex:1;overflow-y:auto;padding:0 16px 16px;
  -webkit-overflow-scrolling:touch;
}
.history-card{
  background:var(--bg-surface);
  border:1px solid rgba(0,212,170,.1);
  border-left:3px solid var(--accent);
  border-radius:var(--radius);
  padding:14px 16px;margin-bottom:10px;
  cursor:pointer;transition:background .15s;
}
.history-card:active{background:rgba(0,212,170,.08)}
.history-card .hc-reg{
  font-size:18px;font-weight:700;color:var(--accent);
  letter-spacing:1px;margin-bottom:4px;
}
.history-card .hc-detail{
  font-size:13px;color:var(--text-dim);line-height:1.5;
}
.history-card .hc-time{
  font-size:11px;color:var(--text-dim);margin-top:6px;opacity:.6;
}
.history-empty{
  text-align:center;padding:60px 20px;color:var(--text-dim);
}

/* ── Stats ── */
.stats-grid{
  display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;
  padding:10px 20px;
}
.stat-card{
  background:var(--bg-surface);
  border:1px solid rgba(0,212,170,.1);
  border-radius:var(--radius);
  padding:20px 12px;text-align:center;
  display:flex;flex-direction:column;gap:6px;
}
.stat-number{
  font-size:28px;font-weight:800;color:var(--accent);
}
.stat-label{font-size:11px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}

/* ── Toast ── */
#toast-container{
  position:fixed;top:44px;left:50%;transform:translateX(-50%);
  z-index:200;display:flex;flex-direction:column;gap:8px;
  padding-top:8px;pointer-events:none;width:90%;max-width:380px;
}
.toast{
  background:rgba(22,33,62,.95);
  backdrop-filter:blur(12px);
  border:1px solid rgba(0,212,170,.15);
  border-radius:10px;padding:12px 16px;
  font-size:13px;color:var(--text);
  animation:toast-in .3s ease,toast-out .3s ease 2.7s forwards;
  text-align:center;pointer-events:auto;
}
.toast.error{border-color:rgba(255,71,87,.3)}
.toast.success{border-color:rgba(46,213,115,.3)}
@keyframes toast-in{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
@keyframes toast-out{to{opacity:0;transform:translateY(-12px)}}

/* ── Utilities ── */
.hidden{display:none!important}

/* ── Scan Frame Animation ── */
@keyframes scan-line{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(120px)}
}
#scan-frame::after{
  content:'';position:absolute;left:4px;right:4px;height:2px;
  background:var(--accent);opacity:.6;border-radius:1px;
  animation:scan-line 2.5s ease-in-out infinite;
}

/* ── Desktop tweaks ── */
@media(min-width:481px){
  .bottom-sheet{max-width:480px;left:50%;transform:translateX(-50%) translateY(100%)}
  .bottom-sheet.visible{transform:translateX(-50%) translateY(0)}
  #scan-frame{width:360px;height:180px}
}