:root {
  color-scheme: light;
  --bg: #d8f8a0;
  --fg: #4e993c;
  --fg-strong: #2f6e2c;
  --border: #4e993c;
  --accent: #2f6e2c;
  --radius: 12px;
  --spacing: 18px;
  font-family: "IBM Plex Mono", "Menlo", "Consolas", "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(24px, 4vw, 56px);
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 3vw, 28px);
}

.hero {
  border: 1px solid var(--border);
  padding: clamp(18px, 3vw, 28px);
  display: grid;
  gap: 10px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  margin: 0;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.4rem);
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  max-width: 60ch;
}

.lede span {
  font-weight: 600;
}

.controls {
  border: 1px solid var(--border);
  padding: clamp(14px, 2.6vw, 20px);
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.control {
  display: grid;
  gap: 8px;
}

.control label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.control input {
  border: 1px solid var(--border);
  padding: 10px 12px;
  background: transparent;
  color: var(--fg);
  font-size: 1rem;
  width: 100%;
}

.hint {
  margin: 0;
  font-size: 0.8rem;
}

.action-row {
  align-content: start;
  grid-auto-rows: min-content;
  gap: 12px;
}

.seed-row {
  display: flex;
  gap: 0;
  align-items: stretch;
}

.seed-row input {
  flex: 1;
  border-right: none;
}

.seed-button {
  white-space: nowrap;
  border-left: 1px solid var(--border);
  width: 52px;
  display: grid;
  place-items: center;
  padding: 0;
}

.seed-button svg {
  width: 18px;
  height: 18px;
}

.seed-button:hover {
  transform: none;
}

.seed-button.spin svg {
  animation: spin-clockwise 0.2s ease-out;
}

@keyframes spin-clockwise {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(180deg);
  }
}

.mode-toggle {
  display: grid;
  gap: 8px;
}

.mode-toggle label {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s ease-out, color 0.15s ease-out;
}

.mode-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.mode-toggle label:hover {
  background: rgba(78, 153, 60, 0.12);
}

.mode-toggle input:checked + label {
  background: var(--fg-strong);
  color: var(--bg);
}

button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  font-size: 0.95rem;
  padding: 10px 12px;
  cursor: pointer;
  transition: transform 0.15s ease-out, background 0.15s ease-out;
}

button:hover {
  background: rgba(78, 153, 60, 0.12);
  transform: translateY(-1px);
}

.grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.panel {
  border: 1px solid var(--border);
  padding: clamp(16px, 2.8vw, 24px);
  display: grid;
  gap: 14px;
}

.panel header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.panel h2 {
  margin: 0;
  font-size: 1rem;
}

textarea {
  width: 100%;
  min-height: 160px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  padding: 12px;
  resize: none;
  font-size: 0.95rem;
  user-select: text;
}


textarea::placeholder {
  color: rgba(78, 153, 60, 0.5);
}

::selection {
  background: var(--fg-strong);
  color: var(--bg);
}

input::selection,
textarea::selection {
  background: var(--fg-strong);
  color: var(--bg);
}

input:focus,
textarea:focus,
button:focus {
  outline: none;
}

textarea:read-only {
  color: var(--fg);
}

.token-view {
  display: grid;
  gap: 6px;
}

.token-box {
  font-size: 0.75rem;
  line-height: 1.5;
  word-break: break-word;
  min-height: 0;
}

.footer {
  padding: 8px 0;
  display: flex;
  justify-content: flex-start;
}

.footer-link {
  display: inline-block;
  color: var(--fg);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  transition: background 0.15s ease-out, transform 0.15s ease-out;
}

.footer-link:hover {
  background: transparent;
  transform: none;
}

@media (max-width: 700px) {
  .action-row {
    grid-template-columns: 1fr;
  }

  button {
    width: 100%;
  }
}