:root {
  --ink: #18211e;
  --paper: #f3f0e8;
  --acid: #c7f36b;
  --blue: #668fa3;
  --terminal: #17201d;
  --terminal-raised: #202b27;
  --terminal-text: #e8ede8;
  --terminal-muted: #9aaba3;
  --terminal-line: rgba(232, 237, 232, 0.15);
  --danger: #ff9c83;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  background:
    linear-gradient(110deg, transparent 64%, rgba(199, 243, 107, 0.28) 64%),
    var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.7;
}

button,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

::selection {
  background: var(--acid);
  color: var(--ink);
}

.console-shell {
  width: min(1180px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 4.5rem);
}

.app-header {
  margin-bottom: clamp(2.5rem, 7vw, 5rem);
}

.back-link {
  color: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}

.back-link:hover,
.back-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

.title-row {
  display: flex;
  gap: 3rem;
  align-items: end;
  justify-content: space-between;
  margin-top: clamp(2rem, 6vw, 4rem);
}

.eyebrow {
  margin: 0 0 0.8rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.8rem, 10vw, 8.5rem);
  font-weight: 400;
  letter-spacing: -0.065em;
  line-height: 0.78;
}

.description {
  max-width: 360px;
  margin: 0;
  font-size: 0.88rem;
}

.terminal {
  overflow: hidden;
  border: 1px solid var(--ink);
  background: var(--terminal);
  box-shadow: 12px 12px 0 rgba(102, 143, 163, 0.38);
  color: var(--terminal-text);
}

.terminal-bar {
  display: flex;
  min-height: 58px;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.8rem 0.65rem 1.2rem;
  border-bottom: 1px solid var(--terminal-line);
  background: var(--terminal-raised);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
}

.status-wrap,
.terminal-actions {
  display: flex;
  gap: 0.65rem;
  align-items: center;
}

.status-dot {
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
  background: #f1ce7a;
  box-shadow: 0 0 0 4px rgba(241, 206, 122, 0.12);
}

.status-dot.ready {
  background: var(--acid);
  box-shadow: 0 0 0 4px rgba(199, 243, 107, 0.12);
}

.status-dot.busy {
  animation: pulse 1s ease-in-out infinite alternate;
  background: #f1ce7a;
}

.status-dot.error {
  background: var(--danger);
  box-shadow: 0 0 0 4px rgba(255, 156, 131, 0.12);
}

.terminal-actions button {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--terminal-line);
  background: transparent;
  color: var(--terminal-text);
  font-size: 0.7rem;
}

.terminal-actions button:hover:not(:disabled),
.terminal-actions button:focus-visible {
  border-color: var(--acid);
  color: var(--acid);
}

.terminal-actions button:focus-visible,
.run-button:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 2px;
}

.terminal-actions button:disabled {
  opacity: 0.38;
}

.terminal-actions .stop-button:not(:disabled) {
  border-color: rgba(255, 156, 131, 0.65);
  color: var(--danger);
}

.transcript {
  height: clamp(340px, 48vh, 570px);
  overflow-y: auto;
  padding: clamp(1.25rem, 3vw, 2rem);
  scrollbar-color: var(--blue) var(--terminal-raised);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(0.82rem, 1.5vw, 0.96rem);
  line-height: 1.6;
}

.system-message {
  display: flex;
  gap: 0.65rem;
  color: var(--terminal-muted);
}

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

.system-message.success {
  color: var(--acid);
}

.system-mark {
  flex: 0 0 auto;
}

.console-entry,
.output {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.console-entry + .console-entry,
.console-entry + .output,
.output + .console-entry,
.output + .output,
.system-message + .console-entry,
.system-message + .output,
.output + .system-message,
.console-entry + .system-message {
  margin-top: 0.4rem;
}

.entry-prompt {
  color: var(--acid);
  user-select: none;
}

.output.stderr {
  color: var(--danger);
}

.console-form {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: start;
  min-height: 68px;
  padding: 0.9rem clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--terminal-line);
  background: var(--terminal-raised);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.prompt {
  padding-top: 0.42rem;
  color: var(--acid);
  font-weight: 700;
}

textarea {
  width: 100%;
  max-height: 9.5rem;
  resize: none;
  overflow-y: auto;
  border: 0;
  background: transparent;
  color: var(--terminal-text);
  line-height: 1.55;
  outline: none;
}

textarea:disabled {
  opacity: 0.5;
}

.run-button {
  padding: 0.42rem 0.75rem;
  border: 1px solid var(--acid);
  background: var(--acid);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 700;
}

.run-button:disabled {
  border-color: var(--terminal-line);
  background: transparent;
  color: var(--terminal-muted);
  opacity: 0.6;
}

.below-terminal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  justify-content: space-between;
  margin-top: 1.5rem;
  font-size: 0.72rem;
}

.below-terminal p {
  margin: 0;
}

.below-terminal code {
  padding: 0.1em 0.35em;
  background: rgba(24, 33, 30, 0.08);
}

@keyframes pulse {
  to {
    opacity: 0.4;
  }
}

@media (prefers-reduced-motion: reduce) {
  .status-dot.busy {
    animation: none;
  }
}

@media (max-width: 700px) {
  .title-row {
    display: block;
  }

  .description {
    margin-top: 2rem;
  }

  .terminal-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .terminal-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .terminal-actions button {
    min-height: 2.5rem;
  }

  .console-form {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .run-button {
    display: none;
  }
}