:root {
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --text: #0F172A;
  --muted: #64748B;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --error-bg: #FEF2F2;
  --error-fg: #B91C1C;
  --border: #E2E8F0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F172A;
    --surface: #1E293B;
    --text: #F8FAFC;
    --muted: #94A3B8;
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --error-bg: #450A0A;
    --error-fg: #FCA5A5;
    --border: #334155;
  }
}

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

html, body { height: 100%; }

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

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.container {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.error {
  background: var(--error-bg);
  color: var(--error-fg);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  text-align: center;
  font-weight: 500;
}

.pill {
  display: flex;
  background: var(--surface);
  border-radius: 16px;
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.08),
    0 4px 16px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.pill:focus-within {
  border-color: var(--accent);
  box-shadow:
    0 0 0 3px rgba(37, 99, 235, 0.15),
    0 4px 16px rgba(0, 0, 0, 0.08);
}

.pill input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 16px;
  letter-spacing: 0.04em;
  padding: 18px 20px;
  min-width: 0;
}

.pill input::placeholder { color: var(--muted); }

.pill button {
  border: none;
  background: var(--accent);
  color: white;
  width: 56px;
  flex-shrink: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.15s ease, transform 0.1s ease;
}

.pill button:hover { background: var(--accent-hover); }

.pill button:focus-visible {
  background: var(--accent-hover);
  outline: 2px solid var(--accent);
  outline-offset: -4px;
}

.pill button:active { transform: scale(0.97); }

@supports (padding: max(0px)) {
  main {
    padding:
      max(16px, env(safe-area-inset-top))
      max(16px, env(safe-area-inset-right))
      max(16px, env(safe-area-inset-bottom))
      max(16px, env(safe-area-inset-left));
  }
}