:root {
  --bg: #0d0b10;
  --bg-raised: #17141c;
  --bg-sunken: #100e14;
  --border: #2c2634;
  --text: #ece7f2;
  --text-dim: #9d94ab;
  --accent: #ff4d6d;
  --accent-soft: #ff8fa3;
  --accent-glow: rgba(255, 77, 109, 0.28);
  --warn-bg: #2a1a12;
  --warn-border: #6b3f22;
  --warn-text: #ffc89b;
  --radius: 14px;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

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

body {
  margin: 0;
  padding: 0 0 4rem;
  background: var(--bg);
  background-image: radial-gradient(ellipse 80% 55% at 50% -10%, #2a1524 0%, transparent 70%);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 54rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

/* Warning ------------------------------------------------------------------ */

.warning {
  background: var(--warn-bg);
  border-bottom: 1px solid var(--warn-border);
  color: var(--warn-text);
  font-size: 0.875rem;
  padding: 0.75rem 1.25rem;
  text-align: center;
}

.warning strong {
  color: #ffdfc4;
}

/* Masthead ----------------------------------------------------------------- */

.masthead {
  text-align: center;
  padding: 3.5rem 0 2.5rem;
}

h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 8.5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  margin: 0;
  color: var(--accent);
  text-shadow: 0 0 44px var(--accent-glow);
}

.tagline {
  color: var(--text-dim);
  margin: 0.5rem auto 0;
  max-width: 34rem;
  text-wrap: balance;
}

/* Stage -------------------------------------------------------------------- */

.stage {
  text-align: center;
  margin-bottom: 3rem;
}

.id-display {
  display: block;
  width: 100%;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 5.2vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  padding: 2rem 1.25rem;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
  overflow-wrap: anywhere;
}

.id-display:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.id-display:active {
  transform: translateY(1px);
}

.id-display.is-rolling #id-text {
  animation: pop 0.22s ease-out;
}

@keyframes pop {
  from {
    opacity: 0.25;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hint {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0.85rem 0 1.25rem;
}

kbd {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.8em;
  padding: 0.1em 0.4em;
}

/* Buttons ------------------------------------------------------------------ */

button {
  font-family: inherit;
  font-size: 0.95rem;
}

.primary {
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 10px;
  color: #1a0710;
  cursor: pointer;
  font-weight: 650;
  padding: 0.7rem 1.6rem;
  transition: background 0.15s ease, transform 0.15s ease;
}

.primary:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}

.primary:active {
  transform: translateY(1px);
}

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

/* Controls ----------------------------------------------------------------- */

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1.25rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.control label {
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.control output {
  color: var(--accent);
  font-family: var(--font-mono);
}

.control--check {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
}

.control--check label {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.85rem;
  font-weight: 500;
}

select {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem 0.6rem;
  width: 100%;
}

input[type="range"] {
  accent-color: var(--accent);
  width: 100%;
}

input[type="checkbox"] {
  accent-color: var(--accent);
  height: 1.05rem;
  width: 1.05rem;
}

/* Stats -------------------------------------------------------------------- */

.stats {
  margin-bottom: 2.5rem;
}

.stats dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1px;
  /* Card colour, not border colour: three stats rarely fill the last row
     exactly, and the leftover cell should read as empty rather than as a
     stray divider. */
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 0;
  overflow: hidden;
}

.stat {
  background: var(--bg-raised);
  box-shadow: 0 0 0 1px var(--border);
  padding: 1.1rem 1.25rem;
}

.stat dt {
  color: var(--text-dim);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stat dd {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0.3rem 0 0;
}

.stats-note {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0.9rem 0 0;
  text-align: center;
  text-wrap: balance;
}

/* Hashing ------------------------------------------------------------------ */

.hashing {
  margin-bottom: 2.5rem;
}

.hashing h2 {
  color: var(--text-dim);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}

.hashing-note {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0 0 0.9rem;
}

.hash-input {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  width: 100%;
  transition: border-color 0.15s ease;
}

.hash-input:focus {
  border-color: var(--accent);
  outline: none;
}

/* Sits directly under the input, sharing its edge, so the two read as one
   control: what you typed above, what it hashes to below. */
.hash-output {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  color: var(--text);
  cursor: pointer;
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.4vw, 1.4rem);
  font-weight: 600;
  padding: 1.1rem 1rem;
  text-align: left;
  width: 100%;
  overflow-wrap: anywhere;
  transition: color 0.12s ease, background 0.12s ease;
}

.hash-output:hover {
  background: var(--bg-sunken);
  color: var(--accent);
}

/* Usage -------------------------------------------------------------------- */

.usage h2 {
  color: var(--text-dim);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 0 0.9rem;
  text-transform: uppercase;
}

pre {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin: 0 0 0.85rem;
  overflow-x: auto;
  padding: 1.1rem 1.25rem;
}

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

.tok-kw {
  color: var(--accent-soft);
}

.tok-str {
  color: #9ad4a0;
}

.tok-com {
  color: var(--text-dim);
}

/* Footer ------------------------------------------------------------------- */

footer {
  color: var(--text-dim);
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  font-size: 0.875rem;
  padding-top: 3rem;
}

footer a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

footer a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Toast -------------------------------------------------------------------- */

.toast {
  background: var(--accent);
  border-radius: 10px;
  bottom: 1.75rem;
  color: #1a0710;
  font-size: 0.875rem;
  font-weight: 650;
  left: 50%;
  opacity: 0;
  padding: 0.65rem 1.25rem;
  pointer-events: none;
  position: fixed;
  transform: translate(-50%, 0.75rem);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}