/* urlshortener — visual system
 *
 * Register: transport signage. A shortener is a routing device, and the
 * code it hands back is the whole product, so the code is the only
 * element allowed to be loud: oversized monospace in signal blue, with
 * the base URL kept deliberately grey beside it. Everything else is
 * quiet, ruled and left-aligned. No web fonts and no CDN — the 2016
 * page pulled Bootstrap and Font Awesome from maxcdn on every view,
 * which told a third party who read which link.
 */

:root {
  --ink: #14161a;
  --ink-soft: #5b6472;
  --paper: #ffffff;
  --field: #eff1f5;
  --rule: #d7dbe2;
  --signal: #1f4fd8;
  --signal-soft: #e5ecfd;
  --alert: #b3261e;

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --gutter: 1.5rem;
  --measure: 44rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: var(--gutter);
  top: 0.5rem;
  z-index: 10;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.75rem;
}

/* ── Masthead ─────────────────────────────────────────────────────── */

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.75rem var(--gutter) 1rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.wordmark-mark {
  font-family: var(--mono);
  color: var(--signal);
  margin-right: 0.35rem;
}

.languages {
  display: flex;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.lang {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.lang:hover { color: var(--ink); border-bottom-color: var(--rule); }
.lang.is-current { color: var(--ink); border-bottom-color: var(--signal); }

/* ── Sheet ────────────────────────────────────────────────────────── */

.sheet {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 3rem;
}

.lede {
  margin: 0 0 2rem;
  font-size: clamp(1.5rem, 1.15rem + 1.6vw, 2.125rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  max-width: 22ch;
}

/* ── Form ─────────────────────────────────────────────────────────── */

.field-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.4rem;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.field {
  flex: 1 1 18rem;
  min-width: 0;
  font-family: var(--mono);
  font-size: 0.9375rem;
  padding: 0.7rem 0.8rem;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--rule);
  border-radius: 2px;
}
.field:focus {
  outline: 2px solid var(--signal);
  outline-offset: 1px;
  background: var(--paper);
}

.go {
  flex: 0 0 auto;
  font: inherit;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  color: var(--paper);
  background: var(--signal);
  border: 1px solid var(--signal);
  border-radius: 2px;
  cursor: pointer;
}
.go:hover { background: #1a44bb; }
.go:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.field-help {
  margin: 0.55rem 0 0;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  max-width: 52ch;
}

/* ── Notices ──────────────────────────────────────────────────────── */

.notice {
  margin: 1.5rem 0 0;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--rule);
  background: var(--field);
  font-size: 0.9375rem;
}
.notice-error {
  border-left-color: var(--alert);
  color: var(--alert);
  background: #fdf1f0;
}

/* ── Result: the one loud element ─────────────────────────────────── */

.result {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 3px solid var(--signal);
}

.result-label {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.result-url {
  margin: 0;
  font-family: var(--mono);
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.result-url a { text-decoration: none; }

.result-base {
  font-size: clamp(0.875rem, 0.8rem + 0.4vw, 1.0625rem);
  color: var(--ink-soft);
}

.result-code {
  font-size: clamp(1.75rem, 1.2rem + 2.6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--signal);
  background: linear-gradient(var(--signal-soft), var(--signal-soft)) no-repeat;
  background-size: 100% 0.35em;
  background-position: 0 88%;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.copy {
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  color: var(--signal);
  background: var(--paper);
  border: 1px solid var(--signal);
  border-radius: 2px;
  cursor: pointer;
}
.copy:hover { background: var(--signal-soft); }
.copy[data-state="done"] { color: var(--ink-soft); border-color: var(--rule); }

.result-target {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}
.result-target code { font-family: var(--mono); }

.back {
  color: var(--signal);
  font-weight: 600;
}

/* ── Colophon ─────────────────────────────────────────────────────── */

.colophon {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1rem var(--gutter) 2.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.8125rem;
  color: var(--ink-soft);
}
.colophon p { margin: 0; }
.colophon a { color: var(--ink-soft); }

.count-number {
  font-family: var(--mono);
  color: var(--ink);
}

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