:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #1b1f24;
  --muted: #5b6470;
  --card: #ffffff;
  --border: #d5dae1;
  --accent: #2f6feb;
  --accent-fg: #ffffff;
  --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --fg: #eceff3;
    --muted: #9aa4b2;
    --card: #1d2128;
    --border: #333a45;
    --accent: #5b8cff;
    --accent-fg: #0b1220;
    --error: #ff8a80;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.card {
  width: 100%;
  max-width: 34rem;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
}

.lede {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

input[type="url"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  font-size: 1rem;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.help {
  margin: 0.4rem 0 1rem;
  color: var(--muted);
  font-size: 0.875rem;
}

button {
  padding: 0.65rem 1.1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-fg);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.05);
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

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

.short-link {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  overflow-wrap: anywhere;
}

.copy-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.copy-row input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.55rem 0.75rem;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.visually-hidden {
  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: 30rem) {
  .copy-row {
    flex-direction: column;
  }
}