:root {
  --bg: #eef5f0;
  --fg: #14261c;
  --muted: #5c7266;
  --card: #fff;
  --cell: #e8f3ec;
  --line: #cfe0d5;
  --accent: #15803d;
  --on-accent: #fff;
  --warn: #b45309;
  --err: #b91c1c;
  --shadow: 0 10px 30px rgba(20, 70, 40, .14);
  --bg-img: url(assets/bg-light.webp);
  --r-card: 28px;
  --r-ctl: 14px;
  --r-cell: 14px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0e1612;
  --fg: #e6f2ea;
  --muted: #8fa89a;
  --card: #16211b;
  --cell: #203029;
  --line: #2c4136;
  --accent: #4ade80;
  --on-accent: #052e16;
  --warn: #fbbf24;
  --err: #f87171;
  --shadow: 0 10px 30px rgba(0, 0, 0, .45);
  --bg-img: url(assets/bg-dark.webp);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #0e1612;
    --fg: #e6f2ea;
    --muted: #8fa89a;
    --card: #16211b;
    --cell: #203029;
    --line: #2c4136;
    --accent: #4ade80;
    --on-accent: #052e16;
    --warn: #fbbf24;
    --err: #f87171;
    --shadow: 0 10px 30px rgba(0, 0, 0, .45);
    --bg-img: url(assets/bg-dark.webp);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg) var(--bg-img) center/cover no-repeat fixed;
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.wrap {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: max(24px, 10vh) 16px 40px;
}

.card {
  background: var(--card);
  border-radius: var(--r-card);
  padding: 24px;
  box-shadow: var(--shadow);
}

[hidden] {
  display: none !important;
}

.who {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.who > div {
  min-width: 0;
}

.who b,
.who small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.who small {
  color: var(--muted);
  font-size: 14px;
}

.av {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--cell);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  user-select: none;
}

.av svg,
.btn svg,
.msg svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.code {
  all: unset;
  box-sizing: border-box;
  cursor: pointer;
  display: flex;
  justify-content: center;
  gap: 5px;
  margin: 24px 0 18px;
  width: 100%;
  user-select: text;
}

.code:focus-visible,
.btn:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.code:focus-visible {
  border-radius: 12px;
  outline-offset: 6px;
}

.d {
  flex: 1 1 0;
  min-width: 0;
  max-width: 56px;
  aspect-ratio: 3/4;
  border-radius: var(--r-cell);
  background: var(--cell);
  display: grid;
  place-items: center;
  font: 700 clamp(24px, 7.5vw, 36px) var(--mono);
}

.g {
  flex: 0 0 10px;
}

.track {
  height: 8px;
  border-radius: 99px;
  background: var(--cell);
  overflow: hidden;
}

.track i {
  display: block;
  height: 100%;
  width: var(--p, 100%);
  border-radius: 99px;
  background: var(--accent);
  transform-origin: left;
}

.sec {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.sec b {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.mono {
  font-family: var(--mono);
}

.low .track i {
  background: var(--warn);
}

.low .sec b {
  color: var(--warn);
}

.msg {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 24px;
  margin: 14px 0 0;
  font-size: 14px;
}

.msg.ok {
  color: var(--accent);
}

.msg.warn {
  color: var(--warn);
}

.msg.err {
  color: var(--err);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.btn {
  all: unset;
  box-sizing: border-box;
  cursor: pointer;
  flex: 1 1 140px;
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 14px;
  border-radius: var(--r-ctl);
  background: var(--cell);
  font-weight: 600;
  text-align: center;
}

.btn.p {
  background: var(--accent);
  color: var(--on-accent);
}

label {
  display: block;
  margin: 0 0 8px;
  font-weight: 600;
}

textarea {
  display: block;
  width: 100%;
  min-height: 96px;
  resize: vertical;
  padding: 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-ctl);
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 var(--mono);
}

textarea[aria-invalid="true"] {
  border-color: var(--err);
}

.hint {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

@media (min-width: 900px) {
  .wrap {
    max-width: 560px;
    padding-top: 16vh;
  }
  .card {
    padding: 32px;
  }
  .d {
    max-width: 64px;
    font-size: 42px;
  }
  .row .btn {
    flex: 1 1 0;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .track i {
    transition: width .25s linear;
  }
}