:root {
  color-scheme: dark;
  --bg: #0f0f0f;
  --panel: #171717;
  --panel-hover: #202020;
  --border: #2c2c2c;
  --border-bright: #454545;
  --text: #f0f0f0;
  --text-secondary: #9b9b9b;
  --text-muted: #686868;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.14);
  --green: #4ade80;
  --red: #f87171;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", monospace;
  --radius: 8px;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.site-header {
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--border);
  background: rgba(15, 15, 15, 0.92);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font: 650 0.76rem/1 var(--mono);
  letter-spacing: 0.14em;
}

.brand img { width: 26px; height: 26px; }

.format-link {
  color: var(--text-secondary);
  font-size: 0.76rem;
}

.format-link:hover { color: var(--text); }

main {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 4.5rem) 0 4rem;
}

.page-heading { margin-bottom: 1.35rem; }

.page-heading h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.page-heading p {
  margin: 0.45rem 0 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.signal-stage { width: 100%; }

.drop-zone {
  width: 100%;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 1.5rem;
  border: 1px dashed var(--border-bright);
  border-radius: 16px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease;
}

.drop-zone:hover,
.drop-zone:focus-visible,
.drop-zone.is-dragging {
  outline: none;
  border-color: var(--accent);
  background: var(--panel-hover);
}

.drop-zone:disabled { cursor: wait; opacity: 0.66; }

.mini-signal {
  height: 42px;
  display: flex;
  align-items: center;
  gap: 3px;
  margin-bottom: 0.5rem;
}

.mini-signal i { width: 7px; display: block; background: var(--accent); }
.mini-signal i:nth-child(1), .mini-signal i:nth-child(7) { height: 18px; }
.mini-signal i:nth-child(2), .mini-signal i:nth-child(6) { height: 34px; }
.mini-signal i:nth-child(3), .mini-signal i:nth-child(5) { height: 25px; }
.mini-signal i:nth-child(4) { height: 42px; }

.drop-title { font-weight: 650; }
.drop-copy { color: var(--text-muted); font-size: 0.78rem; }

.link-form {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.link-form input {
  min-width: 0;
  height: 44px;
  flex: 1;
  padding: 0 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  background: var(--panel);
  color: var(--text);
  font: 450 0.74rem/1 var(--mono);
}

.link-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.link-form input::placeholder { color: var(--text-muted); }

.link-form button,
.result-actions button,
.lookup-button {
  min-height: 40px;
  padding: 0 0.9rem;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  background: var(--panel-hover);
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.link-form button { border-color: var(--accent); background: var(--accent); color: #07131a; }
.link-form button:hover { opacity: 0.9; }
.result-actions button:hover, .lookup-button:hover { border-color: var(--accent); }
.lookup-button:disabled { cursor: wait; opacity: 0.6; }

.input-error {
  min-height: 1.1rem;
  margin: 0.55rem 0 0;
  color: var(--red);
  font-size: 0.76rem;
}

.local-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.3rem 0 0;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #fbbf24;
}

.status-dot.ready { background: var(--green); }
.status-dot.error { background: var(--red); }
.privacy-copy { margin-left: auto; }

.result { width: 100%; }

.signal-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 190px;
  padding: 1rem;
  border-radius: 16px;
  background: #f3f3f5;
}

#signal-canvas {
  display: block;
  width: min(100%, 690px);
  height: auto;
  image-rendering: pixelated;
}

.result-copy { margin-top: 1.1rem; text-align: center; }

.result-copy h2 {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1.15;
}

.result-copy p { margin: 0.35rem 0 0; color: var(--text-secondary); }
.result-copy span { display: block; margin-top: 0.45rem; color: var(--text-muted); font: 500 0.72rem/1 var(--mono); }

.result-actions { display: flex; justify-content: center; gap: 0.5rem; margin-top: 0.9rem; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.service-link {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text-secondary);
  text-align: center;
  font-size: 0.7rem;
  font-weight: 600;
}

.service-link:hover { border-color: var(--accent); color: var(--text); }

.catalog-lookup {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.75rem;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.catalog-lookup strong { font-size: 0.8rem; }
.catalog-lookup p { margin: 0.22rem 0 0; color: var(--text-muted); font-size: 0.7rem; }

.lookup-results:empty { display: none; }

.lookup-results {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.lookup-status { margin: 0; color: var(--text-secondary); font-size: 0.76rem; }

.catalog-match {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.catalog-match img { width: 48px; height: 48px; border-radius: 5px; object-fit: cover; }
.catalog-match-copy { min-width: 0; }
.catalog-match-copy strong, .catalog-match-copy span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.catalog-match-copy strong { font-size: 0.78rem; }
.catalog-match-copy span { margin-top: 0.2rem; color: var(--text-muted); font-size: 0.66rem; }
.catalog-match a { padding: 0.45rem 0.55rem; border: 1px solid var(--border-bright); border-radius: 6px; font-size: 0.66rem; }
.catalog-match a:hover { border-color: var(--accent); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 650px) {
  main { width: min(100% - 1rem, 760px); padding-top: 2rem; }
  .format-link { font-size: 0.68rem; }
  .drop-zone, .signal-frame { min-height: 150px; border-radius: 12px; }
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-link:last-child { grid-column: span 2; }
  .catalog-lookup { align-items: stretch; flex-direction: column; }
}

@media (max-width: 430px) {
  .site-header { padding-inline: 0.75rem; }
  .brand span { font-size: 0.68rem; }
  .link-form { flex-direction: column; }
  .result-actions button { flex: 1; }
  .privacy-copy { display: none; }
  .catalog-match { grid-template-columns: 44px minmax(0, 1fr); }
  .catalog-match img { width: 44px; height: 44px; }
  .catalog-match a { grid-column: 1 / -1; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}