:root {
  --bg: #0b0b16;
  --cyan: #00d4ff;
  --violet: #7b2cbf;
  --grad: linear-gradient(135deg, #00d4ff, #7b2cbf);
  --glass: rgba(18, 18, 32, 0.62);
  --stroke: rgba(255, 255, 255, 0.12);
  --text: #f3f4f8;
  --muted: rgba(243, 244, 248, 0.62);
}

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

html, body { height: 100%; }

body {
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* Animated background glow behind the landing screens */
.bg-glow {
  position: fixed;
  inset: -20%;
  z-index: 0;
  background:
    radial-gradient(40% 40% at 20% 20%, rgba(0, 212, 255, 0.22), transparent 60%),
    radial-gradient(45% 45% at 85% 80%, rgba(123, 44, 191, 0.25), transparent 60%);
  filter: blur(8px);
  animation: drift 16s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(3%, 2%, 0) scale(1.08); }
}

#ar-container {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
}
#ar-container canvas { display: block; }

/* ===== Screens ===== */
.screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(20px, env(safe-area-inset-top)) 20px max(20px, env(safe-area-inset-bottom));
  overflow-y: auto;
}
.screen.hidden { display: none; }

.glass {
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  border: 1px solid var(--stroke);
  border-radius: 24px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}

.card {
  width: 100%;
  max-width: 420px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.card.center { align-items: center; text-align: center; gap: 16px; }

/* ===== Brand ===== */
.brand { text-align: center; display: flex; flex-direction: column; gap: 8px; }
.logo {
  width: 60px; height: 60px; margin: 0 auto 4px;
  display: grid; place-items: center;
  font-size: 30px; border-radius: 18px;
  background: var(--grad);
  box-shadow: 0 8px 26px rgba(0, 212, 255, 0.35);
}
.brand h1 { font-size: 1.6rem; letter-spacing: -0.02em; }
.tagline { color: var(--muted); font-size: 0.95rem; line-height: 1.45; }

/* ===== Segmented control ===== */
.seg {
  display: flex; gap: 4px; padding: 4px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--stroke);
  border-radius: 14px;
}
.seg-btn {
  flex: 1; padding: 10px; border: 0; cursor: pointer;
  background: transparent; color: var(--muted);
  font-size: 0.92rem; font-weight: 600; border-radius: 10px;
  transition: all 0.2s;
}
.seg-btn.active { background: var(--grad); color: #fff; box-shadow: 0 4px 14px rgba(0, 212, 255, 0.3); }

/* ===== Panels ===== */
.panel { display: flex; flex-direction: column; gap: 12px; }
.panel.hidden { display: none; }
.demo-thumb {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover;
  border-radius: 14px; border: 1px solid var(--stroke);
}
.hint { color: var(--muted); font-size: 0.85rem; line-height: 1.5; }
.hint a { color: var(--cyan); text-decoration: none; white-space: nowrap; }

/* ===== Dropzones ===== */
.drop {
  position: relative; display: block; cursor: pointer;
  border: 2px dashed rgba(255, 255, 255, 0.22);
  border-radius: 16px; padding: 22px 16px;
  text-align: center; transition: all 0.2s;
  overflow: hidden;
}
.drop.small { padding: 16px; }
.drop:hover, .drop.over { border-color: var(--cyan); background: rgba(0, 212, 255, 0.07); }
.drop-body { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.drop-ico { font-size: 26px; }
.drop-body strong { font-size: 0.95rem; }
.drop-body em { color: var(--cyan); font-style: normal; font-weight: 500; }
.drop-body span { color: var(--muted); font-size: 0.8rem; }
.drop-preview {
  width: 100%; max-height: 180px; object-fit: contain; border-radius: 10px;
}
.drop-preview.hidden, .drop-status.hidden, .drop-body.hidden { display: none; }
.drop-status {
  margin-top: 10px; font-size: 0.82rem; color: var(--cyan); font-weight: 600;
}
.drop-status.ok { color: #34d399; }
.drop-status.err { color: #ff6b81; }

/* ===== Buttons ===== */
.btn-primary {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 15px; border: 0; cursor: pointer;
  background: var(--grad); color: #fff;
  font-size: 1.02rem; font-weight: 700; border-radius: 14px;
  box-shadow: 0 10px 28px rgba(0, 212, 255, 0.32);
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(0, 212, 255, 0.42); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: progress; transform: none; }
.btn-ico { font-size: 1.1rem; }
.micro { color: var(--muted); font-size: 0.74rem; text-align: center; }

.ghost {
  background: rgba(255, 255, 255, 0.08); color: var(--text);
  border: 1px solid var(--stroke); border-radius: 12px;
  padding: 9px 14px; font-size: 0.85rem; font-weight: 600; cursor: pointer;
  transition: background 0.2s;
}
.ghost:hover { background: rgba(255, 255, 255, 0.16); }

/* ===== Spinner + progress ===== */
.spinner {
  width: 46px; height: 46px; border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.2); border-top-color: var(--cyan);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.bar { width: 100%; height: 8px; border-radius: 6px; background: rgba(255, 255, 255, 0.14); overflow: hidden; }
.bar > div { height: 100%; width: 0; background: var(--grad); transition: width 0.2s; }

/* ===== AR overlay ===== */
#ui-layer {
  position: fixed; inset: 0; z-index: 10; pointer-events: none;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: max(16px, env(safe-area-inset-top)) 16px max(20px, env(safe-area-inset-bottom));
}
#ui-layer.hidden { display: none; }
#ui-layer > * { pointer-events: auto; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 999px; font-size: 0.85rem; font-weight: 600;
  background: var(--glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--stroke);
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); transition: all 0.3s; }
.pill.tracking { color: var(--cyan); }
.pill.tracking .dot { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

.toast {
  align-self: center; max-width: 92%; text-align: center;
  padding: 10px 16px; border-radius: 12px; font-size: 0.88rem; color: var(--text);
  background: rgba(0, 0, 0, 0.55); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 0.78; } 50% { opacity: 1; } }

.dock {
  align-self: center; display: flex; gap: 6px; padding: 8px;
  background: var(--glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--stroke); border-radius: 18px;
}
.dock-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  min-width: 66px; padding: 9px 8px; cursor: pointer;
  background: transparent; color: var(--muted); border: 0; border-radius: 12px;
  font-size: 0.7rem; font-weight: 600; transition: all 0.2s;
}
.dock-btn .e { font-size: 1.25rem; }
.dock-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.08); }
.dock-btn.active { color: #fff; background: var(--grad); box-shadow: 0 4px 14px rgba(0, 212, 255, 0.3); }

h2 { font-size: 1.25rem; }