/* ============================================
   Argument Footnote Builder — Styles
   ============================================ */

:root {
  --color-bg: #f8f7f4;
  --color-surface: #ffffff;
  --color-surface-alt: #f0eeea;
  --color-text: #1a1a2e;
  --color-text-secondary: #5a5a72;
  --color-text-muted: #8a8a9a;
  --color-primary: #4361ee;
  --color-primary-hover: #3a56d4;
  --color-primary-light: #eef1ff;
  --color-accent: #f72585;
  --color-accent-light: #fff0f6;
  --color-success: #06d6a0;
  --color-success-light: #edfdf8;
  --color-warning: #ffd166;
  --color-warning-light: #fff9eb;
  --color-danger: #ef476f;
  --color-danger-light: #fef2f5;
  --color-border: #e0dee6;
  --color-border-light: #eeecf2;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --max-width: 1200px;
  --header-height: 64px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus {
  top: 16px;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.logo:hover {
  text-decoration: none;
  color: var(--color-text);
}
.logo-icon {
  color: var(--color-primary);
}
.logo-accent {
  color: var(--color-primary);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 8px;
}
.nav-list a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all var(--transition);
}
.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}
.btn:hover {
  text-decoration: none;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
}

/* Builder Section */
.builder-section {
  padding: 40px 0 60px;
}

.builder-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.builder-inputs,
.builder-output {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

/* Form */
.form-group {
  margin-bottom: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}
.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}
.form-input::placeholder {
  color: var(--color-text-muted);
}
textarea.form-input {
  resize: vertical;
  min-height: 60px;
}
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%235a5a72' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}
.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

/* Output Panel */
.output-panel {
  min-height: 120px;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 2px dashed var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-text);
  word-break: break-word;
  white-space: pre-wrap;
}
.output-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--color-text-muted);
  text-align: center;
  padding: 20px 0;
}
.output-empty-icon {
  color: var(--color-border);
}
.output-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* Credibility Panel */
.credibility-panel {
  margin-top: 24px;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}
.credibility-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.credibility-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.credibility-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.5;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}
.credibility-list li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  margin-top: 1px;
}
.cred-flag {
  background: var(--color-danger-light);
  color: var(--color-danger);
}
.cred-flag::before {
  content: '!';
  background: var(--color-danger);
  color: #fff;
}
.cred-warn {
  background: var(--color-warning-light);
  color: #b8860b;
}
.cred-warn::before {
  content: '~';
  background: var(--color-warning);
  color: #333;
}
.cred-ok {
  background: var(--color-success-light);
  color: #0a8a6a;
}
.cred-ok::before {
  content: '✓';
  background: var(--color-success);
  color: #fff;
}

/* Info Sections */
.info-section {
  padding: 60px 0;
}
.info-section--alt {
  background: var(--color-surface);
}
.section-intro {
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}
.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* Guide Cards */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.guide-card {
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border-light);
}
.guide-card--red {
  background: var(--color-danger-light);
  border-color: rgba(239, 71, 111, 0.2);
}
.guide-card--green {
  background: var(--color-success-light);
  border-color: rgba(6, 214, 160, 0.2);
}
.guide-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.guide-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.guide-card li {
  font-size: 0.92rem;
  line-height: 1.5;
  padding-left: 20px;
  position: relative;
}
.guide-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  font-weight: 700;
}
.guide-card--red li::before {
  color: var(--color-danger);
}
.guide-card--green li::before {
  color: var(--color-success);
}

/* Comparison Table */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.comparison-table th {
  text-align: left;
  padding: 14px 18px;
  background: var(--color-surface-alt);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}
.comparison-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
  line-height: 1.5;
}
.comparison-table tr:last-child td {
  border-bottom: none;
}
.comparison-table em {
  font-style: italic;
}

/* Mistakes */
.mistakes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.mistake-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-warning);
}
.mistake-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.mistake-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Edge Cases */
.edge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.edge-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-primary);
}
.edge-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.edge-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.faq-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border-light);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-item dt {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-text);
}
.faq-item dd {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  padding: 40px 0 24px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.footer-brand .logo-text {
  font-size: 1rem;
  font-weight: 700;
}
.footer-tagline {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}
.footer-links {
  display: flex;
  list-style: none;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}
.footer-bottom a {
  color: var(--color-text-muted);
  text-decoration: underline;
}
.footer-bottom a:hover {
  color: var(--color-primary);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 1;
  transform: translateY(0);
}
.toast.hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

/* Utilities */
.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 900px) {
  .builder-layout {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .guide-grid,
  .mistakes-grid,
  .edge-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .hero {
    padding: 48px 0 40px;
  }
  .hero-title {
    font-size: 1.6rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .builder-inputs,
  .builder-output {
    padding: 20px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .info-section {
    padding: 40px 0;
  }
  .footer-inner {
    flex-direction: column;
  }
  .footer-bottom {
    flex-direction: column;
  }
  .nav-list {
    gap: 4px;
  }
  .nav-list a {
    padding: 6px 10px;
    font-size: 0.82rem;
  }
}

@media (max-width: 400px) {
  .header-inner {
    gap: 8px;
  }
  .logo-text {
    font-size: 0.95rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .output-actions {
    flex-direction: column;
  }
  .output-actions .btn {
    width: 100%;
  }
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .hero,
  .builder-inputs,
  .output-actions,
  .form-actions,
  .toast {
    display: none !important;
  }
  .builder-section {
    padding: 0;
  }
  .builder-layout {
    display: block;
  }
  .builder-output {
    box-shadow: none;
    border: none;
    padding: 0;
  }
  .output-panel {
    border: 1px solid #ccc;
  }
}



/* 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;
}