/* Reset and base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #f7f5f2;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-accent: #2d6a4f;
  --color-accent-light: #40916c;
  --color-border: #d4d0ca;
  --color-muted: #ece9e4;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --max-width: 960px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  background: var(--color-accent);
  color: #fff;
  padding: 2rem 0;
}
.site-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.site-tagline {
  font-size: 1rem;
  opacity: 0.9;
  margin-top: 0.25rem;
}

/* Main */
main { flex: 1; padding: 2rem 0 3rem; }
section { margin-bottom: 3rem; }

/* Intro */
.intro h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-accent);
}
.intro p { margin-bottom: 0.75rem; color: var(--color-text-secondary); }
.intro strong { color: var(--color-text); }

/* Generator */
.generator {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}
.generator h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.control-group label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
}
.control-group .optional {
  font-weight: 400;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}
.control-group input,
.control-group select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
}
.control-group input:focus,
.control-group select:focus {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 1px;
}
.control-group small {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* Presets */
.presets {
  margin-bottom: 1.5rem;
}
.presets h3 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}
.preset-btn {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  margin: 0 0.375rem 0.375rem 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-muted);
  font-size: 0.8125rem;
  cursor: pointer;
  font-family: var(--font-sans);
  color: var(--color-text);
  transition: background 0.15s, border-color 0.15s;
}
.preset-btn:hover {
  background: var(--color-border);
  border-color: var(--color-accent-light);
}

/* Actions */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.btn-primary,
.btn-secondary {
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s, transform 0.1s;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: none;
}
.btn-primary:hover { background: var(--color-accent-light); }
.btn-primary:active { transform: scale(0.98); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-muted); }

/* Output */
.output {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
}
.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.output-header h3 { font-size: 1rem; }
#caption-count {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.caption-grid {
  display: grid;
  gap: 0.5rem;
}
.caption-cell {
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.75rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

/* Guide */
.guide h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}
.guide h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.75rem;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.guide-card h3 {
  font-size: 0.9375rem;
  margin: 0 0 0.5rem;
  color: var(--color-accent);
}
.guide-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.mistakes-list {
  list-style: none;
  padding: 0;
}
.mistakes-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.mistakes-list li:last-child { border-bottom: none; }
.mistakes-list strong { color: var(--color-text); }

.guide p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

/* FAQ */
.faq h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}
.faq dl { display: grid; gap: 1rem; }
.faq dt {
  font-weight: 600;
  font-size: 0.9375rem;
}
.faq dd {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.site-footer a {
  color: var(--color-accent);
  text-decoration: none;
}
.site-footer a:hover { text-decoration: underline; }
.last-updated { margin-top: 0.5rem; font-size: 0.75rem; }

/* Print styles */
@media print {
  body { background: #fff; }
  .site-header,
  .site-footer,
  .controls,
  .presets,
  .actions,
  .intro,
  .guide,
  .faq,
  [aria-label="Quick presets"] { display: none !important; }
  .generator {
    border: none;
    box-shadow: none;
    padding: 0;
  }
  .output { border-top: none; padding-top: 0; }
  .output-header { display: none; }
  .caption-cell {
    border: 1px solid #999;
    background: #fff;
    color: #000;
  }
}

/* Responsive */
@media (max-width: 640px) {
  .container { padding: 0 1rem; }
  .generator { padding: 1.25rem; }
  .controls { grid-template-columns: 1fr; }
  .actions { flex-direction: column; }
  .actions button { width: 100%; }
  .site-title { font-size: 1.375rem; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .controls { grid-template-columns: repeat(2, 1fr); }
}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}