/* public/styles.css — V1 minimal */

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

:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --ink-muted: #6b6b6b;
  --border: #e2e2dd;
  --border-strong: #c8c8c2;
  --accent: #1a1a1a;
  --success: #047857;
  --error: #b91c1c;
  --warning: #b45309;
  --radius: 6px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.875rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 0 2.25rem;
  color: var(--ink-muted);
  font-size: 1rem;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.4rem;
}

.hint {
  font-weight: 400;
  color: var(--ink-muted);
}

textarea, input[type="text"], select, button {
  font-family: inherit;
  font-size: 1rem;
}

textarea {
  width: 100%;
  padding: 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875rem;
  resize: vertical;
  background: var(--surface);
  line-height: 1.5;
}

textarea:focus, input[type="text"]:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

input[type="text"] {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.input-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0 1.25rem;
}

@media (max-width: 540px) {
  .input-meta { grid-template-columns: 1fr; }
}

.actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

button {
  padding: 0.6rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
  transition: background 0.12s, border-color 0.12s;
}

button:hover { background: #f1f1ee; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button:disabled:hover { background: var(--surface); }

button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}

button.primary:hover:not(:disabled) { background: #000; }

.status {
  font-size: 0.875rem;
  min-height: 1.25rem;
  color: var(--ink-muted);
}

.status.error { color: var(--error); }
.status.success { color: var(--success); }
.status.warning { color: var(--warning); }
.status.loading { color: var(--ink-muted); font-style: italic; }

.output-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.output-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.transpose-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.transpose-control label {
  margin: 0;
}

.output-actions {
  display: flex;
  gap: 0.5rem;
}

select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
}

select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chart-output {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-x: auto;
  margin: 0;
}

/* ─── Usage indicator + paywall ─── */
.usage-indicator {
  font-size: 0.85rem;
  color: var(--ink-muted);
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  background: #f5f5f0;
  border-radius: var(--radius);
}

.usage-indicator.at-limit {
  background: #fef3c7;
  color: var(--warning);
  font-weight: 500;
}

.usage-indicator.paid {
  background: #d1fae5;
  color: var(--success);
  font-weight: 500;
}

.upgrade-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

.upgrade-link:hover {
  color: #000;
}

/* ─── Pricing + success pages ─── */
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 480px;
  margin: 1rem auto;
  text-align: center;
}

.pricing-card h2 {
  margin: 0 0 1rem;
}

.price {
  margin: 0.5rem 0 1.5rem;
}

.price .amount {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.price .period {
  color: var(--ink-muted);
  font-size: 1rem;
}

.features {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  text-align: left;
}

.features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.features li:last-child {
  border-bottom: none;
}

.features li::before {
  content: "✓ ";
  color: var(--success);
  font-weight: 700;
  margin-right: 0.25rem;
}

.pricing-card .primary {
  width: 100%;
  padding: 0.875rem;
  font-size: 1.05rem;
}

.button-link {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
}

.button-link:hover {
  background: #000;
}

.footnote-link {
  text-align: center;
  margin-top: 1rem;
}

.footnote-link a {
  color: var(--ink-muted);
  text-decoration: none;
}

.footnote-link a:hover {
  color: var(--ink);
}

#restore-link {
  color: var(--ink-muted);
  text-decoration: underline;
}

#restore-link:hover {
  color: var(--ink);
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.footnote {
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin: 0;
}

@media print {
  body { background: #fff; padding: 0; max-width: none; }
  .no-print, header, .input-section, footer { display: none !important; }
  .output-section { margin: 0; padding: 0; border: none; }
  .chart-output { border: none; padding: 0; background: #fff; font-size: 11pt; }
}