/* ============================================================
   Design tokens. All visual values flow from here.
   ============================================================ */
:root {
  /* surfaces */
  --bg:           #0f0f12;
  --surface:      #16161b;
  --surface-2:    #1c1c22;
  --surface-3:    #22222a;

  /* borders */
  --border:        #2a2a32;
  --border-strong: #3a3a44;

  /* text */
  --fg:        #e8e8ec;
  --fg-muted:  #9a9aa6;
  --fg-dim:    #6b6b78;

  /* brand */
  --primary:        #7c3aed;
  --primary-hover:  #8b5cf6;
  --primary-soft:   rgba(124, 58, 237, 0.14);
  --primary-ring:   rgba(124, 58, 237, 0.35);

  /* state */
  --success:        #10b981;
  --success-soft:   rgba(16, 185, 129, 0.14);
  --warning:        #f59e0b;
  --warning-soft:   rgba(245, 158, 11, 0.14);
  --error:          #ef4444;
  --error-soft:     rgba(239, 68, 68, 0.14);

  /* typography */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', 'JetBrains Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  /* radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;

  /* spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;

  /* elevation */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);

  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  padding: var(--sp-6) var(--sp-4);
  display: flex;
  justify-content: center;
}

code, pre, kbd, samp { font-family: var(--font-mono); }

/* ============================================================
   Main container
   ============================================================ */
.terminal {
  width: 100%;
  max-width: 560px;
  padding: var(--sp-6) var(--sp-5);
}

.terminal-wide { max-width: 720px; }

/* ============================================================
   Header (prompt + breadcrumb)
   ============================================================ */
.prompt {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--sp-2);
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.3;
  margin-bottom: var(--sp-2);
}

.prompt-link {
  color: var(--fg);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  transition: color 120ms ease;
}
.prompt-link:hover { color: var(--primary-hover); }
.prompt-link:hover .caret { color: var(--primary-hover); }

.caret {
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 600;
  transition: color 120ms ease;
}

.prompt .muted {
  color: var(--fg-muted);
  font-size: 1rem;
  font-weight: 500;
  margin-left: 0;
}

/* ============================================================
   Lede / intro copy
   ============================================================ */
.lede {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 var(--sp-6) 0;
}

.lede p { margin: 0 0 var(--sp-1) 0; }
.lede p.muted,
.lede .muted { color: var(--fg-dim); }

/* ============================================================
   Landing — tool grid
   ============================================================ */
.tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--sp-3);
  margin: 0 0 var(--sp-5) 0;
  padding: 0;
  list-style: none;
}

.tool {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  background: var(--surface);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-4);
  cursor: pointer;
  text-decoration: none;
  text-align: left;
  min-height: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  transition: border-color 140ms ease, background 140ms ease, transform 100ms ease;
}

.tool:not([disabled]):hover {
  border-color: var(--primary);
  background: var(--surface-2);
}
.tool:not([disabled]):active { transform: translateY(1px); }

.tool[disabled] {
  color: var(--fg-dim);
  cursor: not-allowed;
  opacity: 0.7;
}

.tool .tool-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}
.tool[disabled] .tool-name { color: var(--fg-muted); }

.tool .tool-desc {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--fg-muted);
}

/* ============================================================
   Status text (shared, JS-driven via .ok/.err/.warn/.running)
   ============================================================ */
.status {
  font-size: 0.875rem;
  margin: var(--sp-2) 0 0 0;
  color: var(--fg-muted);
  min-height: 1.2em;
  word-break: break-word;
  line-height: 1.5;
}
.status.ok   { color: var(--success); }
.status.err  { color: var(--error); }
.status.warn { color: var(--warning); }
.status.running { color: var(--fg); }
.status.running::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  margin-right: var(--sp-2);
  vertical-align: middle;
  animation: dt-pulse 1.2s ease-in-out infinite;
}

@keyframes dt-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.8); }
  50%      { opacity: 1;    transform: scale(1);   }
}

/* ============================================================
   Footer
   ============================================================ */
.foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: var(--sp-4);
  margin-top: var(--sp-6);
  font-size: 0.8125rem;
  color: var(--fg-dim);
}
.foot .sep { opacity: 0.4; }

/* ============================================================
   Focus ring (keyboard only)
   ============================================================ */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--primary-ring);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ============================================================
   Mobile
   ============================================================ */
@media (max-width: 560px) {
  body { padding: var(--sp-4) var(--sp-3); }
  .terminal { padding: var(--sp-5) var(--sp-3); }
  .prompt { font-size: 1.375rem; }
  .tools { grid-template-columns: 1fr; }
  .tool { min-height: 64px; }
}