:root {
  --bg: #05060c;
  --bg-soft: #101521;
  --panel: rgba(8, 12, 20, 0.92);
  --teal: #7ef7d7;
  --amber: #ffd166;
  --rose: #ff6db2;
  --ink: #f7fcff;
  --muted: #9fb0c7;
  --line: rgba(126, 247, 215, 0.24);
  --shadow: 0 0 0 4px #000, 0 14px 36px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body,
input,
select,
button,
textarea,
pre,
code,
output {
  font-family: "Press Start 2P", monospace;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(255, 209, 102, 0.08), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}

.viewport {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.keygen-stage {
  width: min(860px, 100%);
  padding: 1rem;
  background: var(--panel) !important;
  border-color: var(--line) !important;
  box-shadow: var(--shadow);
}

.masthead {
  margin-bottom: 1rem;
  text-align: center;
}

.subhead,
.field-label,
.feedback {
  line-height: 1.8;
}

.logo {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0.06em;
}

.subhead {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.56rem;
}

.chrome-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
  gap: 1rem;
  align-items: stretch;
}

.generator-panel,
.license-panel {
  background: var(--panel) !important;
  border-color: var(--line) !important;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.04);
}

.generator-panel {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.generator-panel .title,
.license-panel .title,
.keygen-stage > .title {
  color: var(--amber) !important;
  background: #000 !important;
}

.field-label {
  display: block;
  margin: 0;
  font-size: 0.58rem;
  color: var(--amber);
}

.field-group {
  display: grid;
  gap: 0.55rem;
}

.nes-select {
  width: 100%;
}

.nes-select select,
.nes-input {
  width: 100%;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--ink) !important;
  background: #0b1220 !important;
  border-color: rgba(126, 247, 215, 0.72) !important;
}

.nes-input {
  margin-bottom: 0;
}

.nes-input::placeholder {
  color: rgba(247, 252, 255, 0.36);
}

.nes-input.is-error {
  border-color: rgba(255, 109, 178, 0.8) !important;
  box-shadow: inset -4px -4px rgba(255, 109, 178, 0.18);
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0;
}

.button-row .nes-btn {
  width: 100%;
  min-width: 0;
  font-size: 0.62rem;
}

.button-row .nes-btn[disabled] {
  opacity: 0.42;
}

.license-panel {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 0.9rem;
}

.license-output {
  display: block;
  min-height: 9rem;
  height: 100%;
  padding: 1rem;
  background: #07111d;
  border: 4px solid #1a2a3b;
  color: var(--teal);
  font-size: clamp(0.92rem, 2vw, 1.18rem);
  line-height: 1.7;
  letter-spacing: 0.16em;
  word-break: break-all;
  text-shadow: 0 0 10px rgba(126, 247, 215, 0.32);
}

.license-actions {
  display: flex;
}

.license-actions .nes-btn {
  min-width: 10rem;
  font-size: 0.62rem;
}

.license-actions .nes-btn[disabled] {
  opacity: 0.42;
}

.feedback {
  margin: 0;
  min-height: 1.2rem;
  font-size: 0.54rem;
}

.feedback-muted {
  color: var(--muted);
}

.feedback-ok {
  color: var(--teal);
}

.feedback-warn {
  color: var(--amber);
}

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

@media (max-width: 920px) {
  .chrome-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .viewport {
    padding: 0.85rem;
  }

  .keygen-stage {
    padding: 1rem;
  }

  .button-row .nes-btn {
    width: 100%;
  }

  .button-row {
    grid-template-columns: 1fr;
  }

  .license-actions .nes-btn {
    width: 100%;
    min-width: 0;
  }

  .license-output {
    min-height: 7.5rem;
    font-size: 0.84rem;
    letter-spacing: 0.1em;
  }
}