/* Tool Breakeven Calculator Styles */
:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-2: #242836;
  --color-surface-3: #2e3344;
  --color-text: #e8eaf0;
  --color-text-secondary: #9ba2b8;
  --color-text-muted: #6b7394;
  --color-accent: #4f8cff;
  --color-accent-hover: #6ba0ff;
  --color-accent-bg: rgba(79, 140, 255, 0.1);
  --color-success: #34d399;
  --color-success-bg: rgba(52, 211, 153, 0.1);
  --color-warning: #fbbf24;
  --color-warning-bg: rgba(251, 191, 36, 0.1);
  --color-danger: #f87171;
  --color-danger-bg: rgba(248, 113, 113, 0.1);
  --color-border: #2e3344;
  --color-border-light: #3a3f52;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --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);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover, a:focus-visible {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

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

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-accent);
  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);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: 16px;
}

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

.nav {
  display: flex;
  gap: 4px;
}
.nav a {
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
}
.nav a:hover, .nav a:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-2);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 64px 0 48px;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-content {
  max-width: 640px;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 32px;
  padding: 16px 20px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  width: fit-content;
}

.hero-stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.hero-stat-label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
  font-family: inherit;
}
.btn:hover, .btn:focus-visible {
  text-decoration: none;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}
.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-border-light);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--color-surface-3);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-2);
}
.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}
.btn-full {
  width: 100%;
}

/* Calculator Section */
.calculator-section {
  padding: 56px 0;
}

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

@media (max-width: 860px) {
  .calc-layout {
    grid-template-columns: 1fr;
  }
}

.calc-inputs,
.calc-results {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.calc-inputs h2,
.calc-results h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* Form */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.form-group 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='%236b7394' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.hint {
  display: block;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.input-with-presets {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset-btn {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.preset-btn:hover, .preset-btn:focus-visible {
  background: var(--color-accent-bg);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.preset-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* Advanced */
.advanced-details {
  margin-bottom: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.advanced-details summary {
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}

.advanced-details summary::-webkit-details-marker {
  display: none;
}

.advanced-details summary::before {
  content: '+';
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.advanced-details[open] summary::before {
  content: '−';
}

.advanced-details summary:hover {
  color: var(--color-text);
}

.advanced-inner {
  padding: 0 14px 14px;
  border-top: 1px solid var(--color-border);
}

/* Results */
.results-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
}

.results-empty svg {
  margin: 0 auto 16px;
  color: var(--color-surface-3);
}

.results-content.hidden {
  display: none;
}

.verdict-card {
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: center;
  margin-bottom: 20px;
  border: 1px solid var(--color-border);
}

.verdict-card.buy {
  background: var(--color-success-bg);
  border-color: var(--color-success);
}

.verdict-card.rent {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

.verdict-card.borrow {
  background: var(--color-accent-bg);
  border-color: var(--color-accent);
}

.verdict-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.verdict-value {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 6px;
}

.verdict-detail {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.breakeven-number {
  text-align: center;
  padding: 16px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.breakeven-value {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.breakeven-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.results-table caption {
  text-align: left;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.results-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
}

.results-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
}

.results-table tr:last-child td {
  border-bottom: none;
}

.results-table tr.best td {
  background: var(--color-accent-bg);
  font-weight: 600;
}

.results-table tr.best td:first-child {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.results-table tr.best td:last-child {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.result-notes {
  margin-bottom: 16px;
}

.result-note {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 8px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.result-note.info {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

.result-note.warn {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.result-note.success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Examples Section */
.examples-section {
  padding: 56px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-sub {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 600px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.scenario-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color var(--transition);
}

.scenario-card:hover {
  border-color: var(--color-accent);
}

.scenario-icon {
  color: var(--color-accent);
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  line-height: 1.55;
}

.scenario-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.scenario-tag.buy {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.scenario-tag.borrow {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

/* Tips Section */
.tips-section {
  padding: 56px 0;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.tip-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tip-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.tip-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.tool-library-finder {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tool-library-finder h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.tool-library-finder ol {
  padding-left: 20px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* History Section */
.history-section {
  padding: 56px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition);
  text-align: left;
  font-family: inherit;
  color: var(--color-text);
  font-size: 0.9rem;
  width: 100%;
}

.history-item:hover, .history-item:focus-visible {
  border-color: var(--color-accent);
}

.history-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-item-name {
  font-weight: 600;
}

.history-item-detail {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.history-item-verdict {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  flex-shrink: 0;
}

.history-item-verdict.buy {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.history-item-verdict.rent {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.history-item-verdict.borrow {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

.history-empty {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 20px 0;
}

/* Assumptions Section */
.assumptions-section {
  padding: 56px 0;
  border-top: 1px solid var(--color-border);
}

.assumptions-section p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 12px;
  max-width: 720px;
}

.last-updated {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 20px;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

.footer-grid p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.footer-grid h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

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

/* Print */
@media print {
  .site-header,
  .site-footer,
  .result-actions,
  .hero,
  .tips-section,
  .examples-section,
  .history-section,
  .assumptions-section {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .calc-inputs,
  .calc-results {
    border: 1px solid #ccc;
    background: #fff;
  }
  .calculator-section {
    padding: 0;
  }
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}



/* 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;
}