:root {
  --bg: #0b0f17;
  --panel: #131a27;
  --panel-2: #1b2434;
  --line: #26324a;
  --text: #e8edf6;
  --muted: #93a1bb;
  --accent: #4da3ff;
  --accent-ink: #06121f;
  --warn: #ffb454;
  --warn-bg: #2a2113;
  --info: #7bd0ff;
  --info-bg: #12212e;
  --ok: #57d38c;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  min-height: 100dvh;
  padding: max(20px, env(safe-area-inset-top)) 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.head h1 {
  margin: 0;
  font-size: 1.9rem;
  letter-spacing: -0.02em;
}
.tagline {
  margin: 6px 0 0;
  color: var(--muted);
}

/* Scanner ------------------------------------------------------------ */
.viewport {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: #05080e;
  border: 1px solid var(--line);
}
#video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.reticle {
  position: absolute;
  inset: 16%;
  border: 2px solid rgba(255, 255, 255, 0.55);
  border-radius: 16px;
  box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.35);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
}
.scanner.live .reticle { opacity: 1; }

.hint {
  text-align: center;
  color: var(--muted);
  margin: 0;
  min-height: 1.4em;
}

/* Buttons ------------------------------------------------------------ */
.btn {
  appearance: none;
  border: 0;
  border-radius: 14px;
  padding: 15px 18px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:active { transform: translateY(1px); }
.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.scanner { display: flex; flex-direction: column; gap: 12px; }
.scanner.live #startBtn { display: none; }

/* Result ------------------------------------------------------------- */
.result {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-wrap: anywhere;
}
.result .kicker {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 4px;
}
.destination {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
}
.destination .host { color: var(--accent); }
.full-url {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 4px 0 0;
}
.open-link {
  display: inline-block;
  margin-top: 4px;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.flags { display: flex; flex-direction: column; gap: 8px; }
.flag {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.92rem;
  border: 1px solid transparent;
}
.flag .dot { font-size: 1rem; line-height: 1.3; }
.flag.warn { background: var(--warn-bg); border-color: #4a3a1a; }
.flag.warn .dot { color: var(--warn); }
.flag.info { background: var(--info-bg); border-color: #1c3a4e; }
.flag.info .dot { color: var(--info); }
.flag.ok { background: #10251a; border-color: #1e402d; }
.flag.ok .dot { color: var(--ok); }

.chain {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.chain summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.9rem;
}
.chain ol {
  margin: 12px 0 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--muted);
}
.chain li span { color: var(--text); }

.notice {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--warn);
  font-size: 0.9rem;
}

.non-url .kicker { color: var(--info); }
.content-box {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86rem;
  white-space: pre-wrap;
}

.error-card { color: var(--danger); }

.foot {
  margin-top: auto;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
  padding-top: 12px;
}

.spinner {
  width: 22px; height: 22px;
  border: 3px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 4px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }