:root {
  color-scheme: dark;
  --black: #020602;
  --panel: #061006;
  --panel-2: #0a180a;
  --green: #39ff14;
  --green-soft: #88ff77;
  --green-dim: #1f8f18;
  --border: #1fc713;
  --danger: #ff5f5f;
  --shadow: rgba(57, 255, 20, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(57, 255, 20, 0.03) 50%, rgba(0, 0, 0, 0.03) 50%),
    var(--black);
  background-size: 100% 4px;
  color: var(--green);
  font-family: "Courier New", Courier, monospace;
  letter-spacing: 0;
}

button,
textarea {
  font: inherit;
}

.terminal-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 32px auto;
  border: 2px solid var(--border);
  background: rgba(2, 6, 2, 0.94);
  box-shadow: 0 0 28px var(--shadow);
}

.terminal-header {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 34px;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
  background: var(--panel-2);
}

.terminal-header span {
  width: 12px;
  height: 12px;
  border: 1px solid var(--green);
  background: var(--black);
}

.top-link,
.tool {
  padding: 24px;
}

.top-link {
  border-bottom: 1px solid var(--green-dim);
}

.top-link a {
  color: var(--green-soft);
  text-decoration: none;
}

.top-link a:hover,
.top-link a:focus-visible {
  background: var(--green);
  color: var(--black);
  outline: none;
}

.prompt {
  margin: 0 0 8px;
  color: var(--green-soft);
}

h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
}

.section-title {
  margin-bottom: 20px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
}

.field,
.controls {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 10px;
}

.field span,
.label {
  color: var(--green-soft);
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  min-height: 420px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 0;
  outline: none;
  background: var(--panel);
  color: var(--green);
  padding: 14px;
  line-height: 1.45;
  caret-color: var(--green);
}

textarea:focus {
  box-shadow: 0 0 0 2px var(--green-dim);
}

textarea::placeholder,
.muted {
  color: var(--green-dim);
}

.controls {
  justify-content: space-between;
}

.key-list {
  min-height: 298px;
  max-height: 420px;
  overflow: auto;
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 10px;
}

.key-list label {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 7px 0;
  word-break: break-word;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 1px 0 0;
  accent-color: var(--green);
}

.button-row,
.footer-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.button-row {
  flex-direction: column;
}

button {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 0;
  background: var(--black);
  color: var(--green);
  cursor: pointer;
  text-transform: uppercase;
}

button:hover,
button:focus-visible {
  background: var(--green);
  color: var(--black);
  outline: none;
}

.footer-actions {
  justify-content: space-between;
  margin-top: 16px;
}

.status {
  min-height: 22px;
  margin: 0;
  color: var(--green-soft);
}

.status.error {
  color: var(--danger);
}

#copyOutput {
  width: auto;
  min-width: 120px;
  padding: 0 16px;
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 260px;
  }

  .key-list {
    min-height: 170px;
  }

  .button-row {
    flex-direction: row;
  }
}

@media (max-width: 560px) {
  .terminal-shell {
    width: calc(100% - 18px);
    margin: 9px auto;
  }

  .top-link,
  .tool {
    padding: 16px;
  }

  .button-row,
  .footer-actions {
    align-items: stretch;
    flex-direction: column;
  }

  #copyOutput {
    width: 100%;
  }
}