:root {
  --bg: #050608;
  --panel: #0e1014;
  --panel-2: #14171d;
  --line: #1f242c;
  --text: #e8eaee;
  --muted: #7d848f;
  --accent: #6ee7ff;
  --accent-2: #ffd166;
  --ok: #4ade80;
  --warn: #fbbf24;
  --err: #f87171;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  min-height: 100vh;
}

body {
  display: flex;
  flex-direction: column;
  background-image:
    radial-gradient(circle at 20% 0%, rgba(110, 231, 255, 0.05), transparent 50%),
    radial-gradient(circle at 80% 100%, rgba(255, 209, 102, 0.04), transparent 50%);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(5, 6, 8, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  width: 22px; height: 22px;
  border: 1.5px solid var(--text);
  border-radius: 50%;
  position: relative;
  display: inline-block;
}
.logo::before, .logo::after {
  content: "";
  position: absolute;
  background: var(--text);
}
.logo::before { left: 50%; top: 2px; bottom: 2px; width: 1.5px; margin-left: -0.75px; }
.logo::after { top: 50%; left: 2px; right: 2px; height: 1.5px; margin-top: -0.75px; }

.title { font-weight: 600; letter-spacing: 0.5px; }

.nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}
.nav a:hover, .nav a.active { color: var(--text); }

main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

.bottombar {
  padding: 12px 16px;
  text-align: center;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.muted { color: var(--muted); }

h1, h2, h3 { font-weight: 600; letter-spacing: 0.3px; margin: 0 0 8px 0; }
h1 { font-size: 28px; }
h2 { font-size: 20px; margin-top: 24px; }
h3 { font-size: 16px; }

p { margin: 0 0 12px 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.panel + .panel { margin-top: 0; }

.row { display: flex; flex-wrap: wrap; gap: 12px; }
.col { display: flex; flex-direction: column; gap: 12px; }
.grow { flex: 1; }
.center { text-align: center; }

button, .btn {
  display: inline-block;
  appearance: none;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.1s, border 0.1s, transform 0.05s;
  font-family: inherit;
}
button:hover, .btn:hover {
  background: #1a1e25;
  border-color: #2a2f38;
}
button:active, .btn:active { transform: translateY(1px); }
button.primary, .btn.primary {
  background: var(--accent);
  color: #051519;
  border-color: var(--accent);
}
button.primary:hover, .btn.primary:hover {
  background: #8eebff;
}
button.warn { color: var(--warn); border-color: rgba(251, 191, 36, 0.3); }
button.danger { color: var(--err); border-color: rgba(248, 113, 113, 0.3); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.big {
  width: 100%;
  padding: 18px 16px;
  font-size: 16px;
}

.btn-group { display: flex; flex-wrap: wrap; gap: 8px; }

input[type="text"], input[type="number"], textarea, select {
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 13px;
}

textarea {
  min-height: 120px;
  resize: vertical;
  word-break: break-all;
}

input[type="file"] {
  width: 100%;
  padding: 12px;
  background: var(--panel-2);
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
}

label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--muted); }

.tile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}
@media (max-width: 480px) { .tile-grid { grid-template-columns: 1fr; } }

.tile {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  transition: border 0.1s;
  cursor: pointer;
}
.tile:hover { border-color: var(--accent); }
.tile h3 { margin: 0 0 4px 0; font-size: 18px; }
.tile p { color: var(--muted); font-size: 13px; margin: 0; }

.qr-wrap {
  background: white;
  padding: 16px;
  border-radius: 8px;
  display: inline-block;
  max-width: 100%;
}
.qr-wrap canvas, .qr-wrap img { display: block; max-width: 100%; height: auto; }
.qr-wrap.center-block { display: flex; justify-content: center; align-items: center; }

.scan-wrap {
  position: relative;
  background: black;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 1;
  max-width: 360px;
  margin: 0 auto;
}
.scan-wrap video { width: 100%; height: 100%; object-fit: cover; display: block; }
.scan-wrap canvas { display: none; }
.scan-overlay {
  position: absolute;
  inset: 16%;
  border: 2px solid rgba(110, 231, 255, 0.7);
  border-radius: 8px;
  pointer-events: none;
}

.progress {
  width: 100%;
  height: 8px;
  background: var(--panel-2);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}
.progress > div {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.15s ease;
}
.progress.ok > div { background: var(--ok); }

.status-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 16px;
  font-family: var(--mono);
  font-size: 13px;
}
.status-grid dt { color: var(--muted); }
.status-grid dd { margin: 0; }

.kv {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-family: var(--mono);
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--muted);
}
.tag.ok { color: var(--ok); border-color: rgba(74, 222, 128, 0.3); }
.tag.warn { color: var(--warn); border-color: rgba(251, 191, 36, 0.3); }
.tag.err { color: var(--err); border-color: rgba(248, 113, 113, 0.3); }
.tag.live { color: var(--accent); border-color: rgba(110, 231, 255, 0.3); }

.viz {
  width: 100%;
  height: 80px;
  background: #07090d;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: block;
}

.log {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  max-height: 180px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.log .ts { color: var(--muted); }

.hint { color: var(--muted); font-size: 13px; }

.divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 16px 0;
}

.subtabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.subtabs button {
  padding: 8px 12px;
  font-size: 13px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
}
.subtabs button.active {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(110, 231, 255, 0.06);
}

.frame-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.frame-cell {
  width: 22px; height: 22px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--muted);
}
.frame-cell.have { background: var(--ok); color: #051915; border-color: var(--ok); }
.frame-cell.miss { background: var(--err); color: #1a0808; border-color: var(--err); }

.center-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.big-state {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-align: center;
  padding: 20px 0;
  color: var(--accent);
}

@media (max-width: 480px) {
  main { padding: 12px; }
  .panel { padding: 12px; }
  h1 { font-size: 22px; }
  .big-state { font-size: 18px; }
}