:root {
  --bg-color: #020302;
  --terminal-green: #8dfc8d;
  --terminal-dim: #2f4f2f;
  --accent: #f2f200;
  font-family: 'Share Tech Mono', monospace;
}

@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, rgba(20, 40, 20, 0.4), transparent 60%), var(--bg-color);
  color: var(--terminal-green);
  font-family: 'Share Tech Mono', monospace;
  overflow: hidden;
}

.terminal-frame {
  width: min(90vw, 900px);
  height: min(90vh, 600px);
  border: 4px solid var(--terminal-green);
  box-shadow: 0 0 40px rgba(141, 252, 141, 0.2);
  background: rgba(0, 20, 0, 0.85);
  display: flex;
  flex-direction: column;
  position: relative;
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--terminal-green);
  background: rgba(10, 30, 10, 0.75);
  letter-spacing: 0.2em;
}

.brand {
  color: var(--accent);
  text-shadow: 0 0 6px rgba(242, 242, 0, 0.6);
}

.controls button {
  margin-left: 0.5rem;
  background: transparent;
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  padding: 0.35rem 0.8rem;
  font-family: inherit;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

.controls button:hover {
  background: var(--terminal-green);
  color: var(--bg-color);
}

.terminal-screen {
  flex: 1;
  position: relative;
  overflow: hidden;
  padding: 1rem 1.5rem;
}

.scanlines {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(141, 252, 141, 0.05),
    rgba(141, 252, 141, 0.05) 2px,
    transparent 2px,
    transparent 4px
  );
  mix-blend-mode: screen;
  animation: pulse 4s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.2; }
}

.output {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding-right: 1rem;
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.message {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 0.6rem;
  align-items: baseline;
}

.timestamp {
  color: var(--terminal-dim);
}

.role {
  color: var(--accent);
  min-width: 7ch;
}

.text {
  white-space: pre-wrap;
}

#input-form {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.75rem 1rem;
  border-top: 2px solid var(--terminal-green);
  background: rgba(10, 30, 10, 0.75);
}

#input-form label {
  letter-spacing: 0.2em;
}

#user-input {
  flex: 1;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  padding: 0.6rem;
  font-family: inherit;
}

#user-input:focus {
  outline: none;
  box-shadow: 0 0 8px rgba(141, 252, 141, 0.4);
}

#input-form button {
  background: transparent;
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  padding: 0.5rem 1.2rem;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

#input-form button:hover {
  background: var(--terminal-green);
  color: var(--bg-color);
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  color: var(--terminal-green);
  z-index: 1000;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.overlay.visible {
  visibility: visible;
  opacity: 1;
}

.panel {
  border: 2px solid var(--terminal-green);
  padding: 2rem;
  width: min(90vw, 400px);
  background: rgba(0, 20, 0, 0.9);
  text-align: center;
  box-shadow: 0 0 30px rgba(141, 252, 141, 0.3);
}

.panel h1 {
  margin-top: 0;
  letter-spacing: 0.25em;
}

.panel input {
  width: 100%;
  margin: 1rem 0;
  padding: 0.7rem;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  font-family: inherit;
}

.panel input:focus {
  outline: none;
  box-shadow: 0 0 10px rgba(141, 252, 141, 0.4);
}

.panel-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.panel button {
  background: transparent;
  border: 1px solid var(--terminal-green);
  color: var(--terminal-green);
  padding: 0.5rem 1rem;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

.panel button:hover {
  background: var(--terminal-green);
  color: var(--bg-color);
}

.disclaimer {
  color: var(--terminal-dim);
  font-size: 0.8rem;
}

@media (max-width: 600px) {
  .terminal-frame {
    width: 95vw;
    height: 95vh;
  }
  .message {
    grid-template-columns: 1fr;
  }
  .role {
    min-width: auto;
  }
}