:root {
  --term-bg: #14110d;
  --term-surface: #1d1914;
  --term-ink: #f5f0e6;
  --term-muted: rgba(245, 240, 230, 0.68);
  --term-border: rgba(255, 255, 255, 0.08);
  --term-accent: var(--accent-2);
  --term-shadow: 0 24px 60px rgba(10, 10, 10, 0.28);
}

.demo-lead {
  font-size: 1rem;
  color: var(--muted);
}

.page-hero {
  padding: 28px 0 12px;
}

.content {
  margin-bottom: 40px;
}

.demo-shell {
  background: var(--term-bg);
  color: var(--term-ink);
  border-radius: 22px;
  padding: 22px;
  box-shadow: var(--term-shadow);
  border: 1px solid rgba(15, 118, 110, 0.18);
  height: clamp(420px, 70vh, 720px);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  animation: rise 420ms ease;
}

.output {
  font-family: "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-wrap;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 10px;
}

.stack-overlay {
  position: absolute;
  top: 2px;
  right: 2px;
  background: rgba(20, 18, 15, 0.796);
  border: 1px solid var(--term-border);
  border-radius: 14px;
  padding: 2px 2px 2px;
  width: clamp(140px, 20%, 200px);
  max-height: 80%;
  display: flex;
  flex-direction: column;
  box-shadow: var(--term-shadow);
  backdrop-filter: blur(6px);
}

.stack-body {
  font-family: "Courier New", monospace;
  background: transparent;
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre;
  overflow-y: auto;
}

.stack-body.flash {
  animation: flash 300ms ease;
}

.input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--term-border);
  padding-top: 12px;
  margin-top: 10px;
}

.prompt {
  font-family: "Courier New", monospace;
  color: var(--term-accent);
}

.input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--term-ink);
  font-family: "Courier New", monospace;
  font-size: 0.95rem;
}

.status {
  font-family: "Courier New", monospace;
  font-size: 0.82rem;
  color: var(--term-muted);
  margin-top: 6px;
}

.terminal-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.led-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding-left: 12px;
}

.led {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #2a231b;
  border: 1px solid rgba(245, 240, 230, 0.18);
  box-shadow: inset 0 0 3px rgba(0, 0, 0, 0.6);
}

.led.is-on {
  background: #3fd27a;
  border-color: rgba(63, 210, 122, 0.7);
  box-shadow: 0 0 8px rgba(63, 210, 122, 0.45);
}

.btn {
  font-family: "Work Sans", "Helvetica Neue", sans-serif;
  border: 1px solid var(--term-border);
  background: var(--term-surface);
  color: var(--term-ink);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: #26211b;
  box-shadow: var(--term-shadow);
}

.demo-notes {
  margin-top: 22px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  animation: rise 520ms ease 80ms both;
}

.demo-notes h3 {
  margin-top: 0;
}

.demo-notes ul {
  padding-left: 18px;
  margin: 0;
}

.demo-notes li {
  margin: 6px 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes flash {
  0% { box-shadow: 0 0 0 rgba(226, 138, 52, 0.0); }
  50% { box-shadow: 0 0 20px rgba(226, 138, 52, 0.35); }
  100% { box-shadow: 0 0 0 rgba(226, 138, 52, 0.0); }
}

@media (max-width: 720px) {
  .stack-overlay {
    position: static;
    width: 100%;
    margin-bottom: 14px;
  }
}