*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  color-scheme: dark;
  --green: #00c853;
  --green-dim: rgba(0, 200, 83, 0.12);
  --green-glow: rgba(0, 200, 83, 0.35);
  --bg: #08080e;
  --bg-card: #0f0f1a;
  --bg-input: #13131f;
  --border: #1e1e32;
  --border-focus: #00c853;
  --text: #e2e2e8;
  --text-muted: #6b6b80;
  --text-dim: #3d3d52;
  --error: #ff3d57;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 180ms ease;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--green);
  color: #000;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: box-shadow var(--transition);
}

.skip-link:focus {
  left: 12px;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.skip-link:hover {
  box-shadow: 0 0 18px var(--green-glow);
}

main:focus { outline: none; }

#main-content {
  scroll-margin-top: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; border-radius: 2px; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ─── Header ─────────────────────────────────────── */
header {
  padding: 56px 0 40px;
  text-align: center;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--green-dim);
  border: 1px solid rgba(0, 200, 83, 0.25);
  color: var(--green);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.header-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h1 span { color: var(--green); }

.subtitle {
  color: var(--text-muted);
  margin-top: 10px;
  font-size: 16px;
}

/* ─── Input card ──────────────────────────────────── */
.input-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}

.input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

#urlInput, #refineInput {
  flex: 1;
  min-width: 220px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 13px 16px;
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#urlInput::placeholder, #refineInput::placeholder { color: var(--text-dim); }

#urlInput:focus, #refineInput:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--green-dim);
}

/* ─── Buttons ─────────────────────────────────────── */
button {
  background: var(--green);
  color: #000;
  border: none;
  padding: 13px 22px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: box-shadow var(--transition), opacity var(--transition), background var(--transition);
}

button:hover:not(:disabled) { box-shadow: 0 0 18px var(--green-glow); }
button:active:not(:disabled) { opacity: 0.88; }
button:disabled { opacity: 0.35; cursor: not-allowed; }

button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

#exampleBtn {
  background: transparent;
  color: var(--green);
  border: 1px solid rgba(0, 200, 83, 0.4);
}
#exampleBtn:hover:not(:disabled) {
  background: var(--green-dim);
  box-shadow: none;
}

/* ─── Progress steps ──────────────────────────────── */
.progress-steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 20px;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  transition: color var(--transition);
}

.step.active { color: var(--green); }
.step.done { color: var(--text-muted); }

.step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}

.step.active .step-num {
  background: var(--green);
  border-color: var(--green);
  color: #000;
}

.step.done .step-num {
  background: var(--text-dim);
  border-color: var(--text-dim);
  color: var(--bg);
}

.step-connector {
  flex: 1;
  height: 1px;
  background: var(--border);
  margin: 0 10px;
  min-width: 24px;
}

/* ─── Status ──────────────────────────────────────── */
#status {
  margin-top: 16px;
  min-height: 20px;
  font-size: 13px;
}

#status.loading {
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 8px;
}

#status.error { color: var(--error); }
#status.success { color: var(--green); }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--green-dim);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; opacity: 0.6; }
}

/* ─── Skeleton ────────────────────────────────────── */
.skeleton-block {
  background: linear-gradient(
    90deg,
    var(--bg-card) 25%,
    var(--bg-input) 50%,
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

@keyframes shimmer { to { background-position: -200% 0; } }

@media (prefers-reduced-motion: reduce) {
  .skeleton-block { animation: none; background: var(--bg-input); }
}

#resultsSkeletonWrap {
  display: none;
}

#resultsSkeletonWrap.visible {
  display: block;
  animation: fadeIn 0.3s ease;
}

#resultsSkeletonWrap,
#resultsSkeletonWrap .results-grid {
  width: 100%;
}

.skeleton-code {
  height: 280px;
  margin-bottom: 16px;
}

.skeleton-line {
  height: 14px;
  margin-bottom: 10px;
  border-radius: 4px;
}

/* ─── Results ─────────────────────────────────────── */
#results {
  animation: fadeIn 0.35s ease;
}

#results,
#results .results-grid,
#results .code-column.card {
  width: 100%;
}

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

@media (prefers-reduced-motion: reduce) {
  #results,
  #resultsSkeletonWrap.visible {
    animation: none;
  }
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 24px;
  align-items: start;
}

/* ─── Cards ───────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  min-width: 0; /* prevent long contents from forcing column width */
}

h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

h3 { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 10px; }

/* ─── Code block ──────────────────────────────────── */
.code-wrapper { position: relative; }

#copyBtn {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 5px 12px;
  font-size: 12px;
  background: rgba(0, 200, 83, 0.1);
  color: var(--green);
  border: 1px solid rgba(0, 200, 83, 0.3);
  z-index: 1;
  border-radius: 6px;
  font-weight: 600;
}
#copyBtn:hover:not(:disabled) {
  background: var(--green);
  color: #000;
  border-color: var(--green);
  box-shadow: none;
}

pre {
  background: #0a0a12;
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  padding: 20px 20px 20px 20px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.6;
  max-height: 420px;
  overflow-y: auto;
  /* Ensure long tokens don't expand the card on small screens */
  overflow-wrap: anywhere;
  word-break: break-word;
}

pre.transcript {
  border-color: var(--border);
  border-left-color: var(--border);
  color: var(--text-muted);
  font-size: 12px;
  max-height: 260px;
  /* Transcript is prose-ish; wrap to keep it mobile friendly */
  white-space: pre-wrap;
}

/* ─── Explanation ─────────────────────────────────── */
.explanation {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
  padding: 14px 16px;
  background: var(--green-dim);
  border-radius: var(--radius);
  border-left: 3px solid rgba(0, 200, 83, 0.4);
}

.explanation:empty { display: none; }

/* ─── Details ─────────────────────────────────────── */
details { margin-top: 16px; }

summary {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 13px;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  transition: color var(--transition);
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: '▸';
  font-size: 10px;
  transition: transform var(--transition);
}
details[open] summary::before { transform: rotate(90deg); }
summary:hover { color: var(--text-muted); }

/* ─── Refine ──────────────────────────────────────── */
.refine-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ─── How-to card ─────────────────────────────────── */
.howto-section {
  margin-top: 0;
}

.howto-section details {
  margin-top: 10px; /* less spacing under the "How to Use" header */
}

.howto-section ol {
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.9;
}

.howto-section li { padding-left: 4px; }
.howto-section li + li { margin-top: 4px; }

/* ─── Toast ───────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: #1a1a2e;
  border: 1px solid var(--green);
  color: var(--green);
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease, transform 200ms ease;
  z-index: 1000;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* ─── Footer ──────────────────────────────────────── */
footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p { color: var(--text-dim); font-size: 13px; }

footer a { color: var(--text-dim); }
footer a:hover { color: var(--text-muted); }

/* ─── Mobile ──────────────────────────────────────── */
@media (max-width: 768px) {
  .container { padding: 0 16px 60px; }
  header { padding: 36px 0 28px; }
  .input-card { padding: 16px; }
  .results-grid { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  h1 { font-size: 1.6rem; }
  .step-label { display: none; }
  pre { font-size: 12px; }
}

@media (max-width: 480px) {
  .input-row { flex-direction: column; }
  #generateBtn, #exampleBtn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}