/* === DESIGN SYSTEM — noaitext.app ===
   App-like. Precision tool, not editorial.

   Palette:
   --surface:     #ffffff   Primary surface
   --surface-alt: #f8f8f8   Secondary surface
   --text:        #0d0d0d   Primary text
   --text-alt:    #6b6b6b   Secondary text
   --accent:      #d94141   Primary accent, CTAs
   --positive:    #2d8a56   Success, humanized
   --link:        #2563eb   Links
   --border:      #e5e5e5   Borders
   --border-alt:  #d4d4d4   Hover/active borders
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --surface: #ffffff;
  --surface-alt: #f8f8f8;
  --text: #0d0d0d;
  --text-alt: #6b6b6b;
  --accent: #d94141;
  --accent-hover: #c43838;
  --positive: #2d8a56;
  --link: #2563eb;
  --border: #e5e5e5;
  --border-alt: #d4d4d4;

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.75rem;
  --space-2xl: 2.5rem;
  --space-3xl: 4rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--surface);
  line-height: 1.55;
  min-height: 100vh;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
h2 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); margin-top: var(--space-3xl); }
h3 { font-size: clamp(1rem, 2vw, 1.2rem); margin-top: var(--space-2xl); }

p, ul, ol { margin-bottom: var(--space-md); }

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: #1d4ed8; }

strong { font-weight: 600; }

code, .score, .stat-number, .word-count {
  font-family: var(--font-mono);
  font-size: 0.82em;
}

/* === LAYOUT === */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: 720px;
}

.section {
  padding: var(--space-3xl) 0;
}

/* === HEADER === */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 0 var(--space-xl);
  height: 52px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0;
}

.site-logo {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.site-logo:hover { color: var(--text); text-decoration: none; }

.site-logo .dot { color: var(--accent); }

.site-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.site-nav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-alt);
  text-decoration: none;
  transition: color 0.12s;
}
.site-nav a:hover { color: var(--text); }

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.5em 1.2em;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.12s;
  line-height: 1.4;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: white;
}
.btn--primary:hover {
  background: var(--accent-hover);
  text-decoration: none;
  color: white;
}
.btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  border-color: var(--text);
  text-decoration: none;
  color: var(--text);
}

.btn--large {
  padding: 0.6em 1.6em;
  font-size: 0.88rem;
}

.btn--ghost {
  background: transparent;
  color: var(--text-alt);
  border: none;
}
.btn--ghost:hover { color: var(--text); }

/* Style chips */
.style-chips {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
}

.style-chip {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-alt);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.45em 1em;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
  line-height: 1.3;
}
.style-chip:hover {
  color: var(--text);
  border-color: var(--border-alt);
  background: var(--surface-alt);
}
.style-chip--active {
  color: white;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}
.style-chip--active:hover {
  color: white;
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.style-chip:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .style-chip {
    font-size: 0.72rem;
    padding: 0.35em 0.8em;
  }
}

/* === MAIN TOOL — SPLIT PANEL === */
.tool-stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 20px rgba(0,0,0,0.04);
  overflow: hidden;
}

.tool-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 400px;
}

@media (max-width: 768px) {
  .tool-panels {
    grid-template-columns: 1fr;
    min-height: auto;
  }
}

.tool-panel {
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  position: relative;
}

.tool-panel--input {
  border-right: 1px solid var(--border);
  background: var(--surface-alt);
}

.tool-panel--output {
  background: var(--surface);
}

@media (max-width: 768px) {
  .tool-panel--input {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-alt);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.panel-label .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.panel-label .dot--red { background: var(--accent); }
.panel-label .dot--green { background: var(--positive); }

.tool-textarea {
  flex: 1;
  width: 100%;
  min-height: 260px;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.65;
  resize: vertical;
  outline: none;
  color: var(--text);
}
.tool-textarea::placeholder {
  color: #a3a3a3;
}

.tool-textarea--drag-over {
  background: #f0f7ff;
  outline: 2px dashed var(--link);
  outline-offset: -4px;
}

.upload-hint {
  opacity: 0.6;
  transition: opacity 0.15s;
}
.tool-panel:hover .upload-hint {
  opacity: 1;
}

.tool-output {
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text);
  min-height: 260px;
}

.tool-output--empty {
  color: #a3a3a3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-output p { margin-bottom: var(--space-sm); }

/* === SCORE DASHBOARD === */
.score-row {
  display: flex;
  gap: 0;
  border-top: 1px solid var(--border);
}

.score-card {
  flex: 1;
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
  position: relative;
}

.score-card + .score-card {
  border-left: 1px solid var(--border);
}

@media (max-width: 768px) {
  .score-row { flex-direction: column; }
  .score-card + .score-card { border-left: none; border-top: 1px solid var(--border); }
}

.score-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-alt);
  margin-bottom: var(--space-xs);
}

.score-value {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
}

.score-value--ai { color: var(--accent); }
.score-value--human { color: var(--positive); }

.score-delta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--positive);
  margin-top: var(--space-xs);
}

.score-direction {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--positive);
  margin-top: var(--space-xs);
}

/* === TOOL ACTIONS === */
.tool-actions {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-top: 1px solid var(--border);
  background: var(--surface-alt);
  align-items: center;
  flex-wrap: wrap;
}


.word-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-alt);
  margin-left: auto;
}

.word-count .remaining { font-weight: 600; color: var(--text); }
.word-count .limit-hit { color: var(--accent); font-weight: 600; }

/* === PAYWALL === */
.paywall-banner {
  background: #fef2f2;
  border-top: 1px solid #fecaca;
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
  display: none;
}

.paywall-banner--visible { display: block; }

.paywall-banner p {
  margin-bottom: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-alt);
}

/* === FEATURES === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.feature-card {
  padding: var(--space-lg);
  background: var(--surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.feature-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--text-alt);
  font-size: 0.82rem;
  line-height: 1.5;
}

.feature-icon {
  width: 32px;
  height: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

/* === HERO === */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero h1 {
  max-width: 20ch;
  margin-bottom: var(--space-sm);
  font-weight: 700;
}

.hero .subtitle {
  font-size: 0.95rem;
  color: var(--text-alt);
  max-width: 56ch;
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

/* === CONTENT PAGES === */
.content-page {
  padding: var(--space-3xl) 0;
}

.content-page h1 {
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.content-page .meta {
  font-size: 0.82rem;
  color: var(--text-alt);
  margin-bottom: var(--space-2xl);
}

.content-page h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.content-page h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.content-page p { max-width: 64ch; }

.content-page ul, .content-page ol {
  max-width: 64ch;
  padding-left: var(--space-lg);
}

.content-page li { margin-bottom: var(--space-sm); }

/* === TABLE === */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin: var(--space-xl) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comparison-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-alt);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-alt);
  border-bottom: 2px solid var(--border);
}

.comparison-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

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

.comparison-table tr:hover td { background: var(--surface-alt); }

.comparison-table .tool-name { font-weight: 600; }

.comparison-table .commission-high {
  color: var(--positive);
  font-weight: 600;
  font-family: var(--font-mono);
}

/* === FAQ === */
.faq-item {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child { border-bottom: none; }

.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.faq-item h3::before {
  content: "Q  ";
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
}

.faq-item p { color: var(--text-alt); }

/* === PRICING === */
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  max-width: 360px;
  margin: var(--space-2xl) auto;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.pricing-card--featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 4px 24px rgba(217, 65, 65, 0.08);
}

.pricing-amount {
  font-family: var(--font-sans);
  font-size: 3rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.03em;
}

.pricing-period {
  color: var(--text-alt);
  font-size: 0.82rem;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: var(--space-xl) 0;
  text-align: left;
}

.pricing-features li {
  padding: var(--space-sm) 0;
  font-size: 0.85rem;
}

.pricing-features li::before {
  content: "✓ ";
  color: var(--positive);
  font-weight: 700;
}

/* === FOOTER === */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0 var(--space-xl);
  font-size: 0.82rem;
  color: var(--text-alt);
}

.site-footer .container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
}

@media (max-width: 768px) {
  .site-footer .container { grid-template-columns: 1fr; }
}

.site-footer h4 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.site-footer a {
  display: block;
  color: var(--text-alt);
  text-decoration: none;
  margin-bottom: var(--space-xs);
}
.site-footer a:hover { color: var(--text); }

.footer-legal {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
}

/* === BREADCRUMB === */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--text-alt);
  margin-bottom: var(--space-md);
}

.breadcrumb a { color: var(--text-alt); text-decoration: none; }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb span { color: var(--border-alt); margin: 0 var(--space-xs); }

/* === TOAST === */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  background: var(--text);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 500;
  z-index: 1000;
  animation: toastIn 0.25s ease-out;
  box-shadow: 0 4px 24px rgba(0,0,0,0.18);
}

.toast--success { background: var(--positive); }
.toast--error { background: var(--accent); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === LOADING === */
.tool-output--loading {
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-dots {
  display: flex;
  gap: 5px;
}

.loading-dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border-alt);
  animation: dotPulse 1s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.loading-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes dotPulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.4); }
}

/* === VOICE GRID === */
.voice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.voice-chip {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.12s, box-shadow 0.12s;
}

.voice-chip:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(217, 65, 65, 0.06);
  text-decoration: none;
  color: var(--text);
}

.voice-chip__icon { font-size: 1.3rem; }
.voice-chip__name { font-weight: 600; font-size: 0.9rem; }
.voice-chip__desc { font-size: 0.75rem; color: var(--text-alt); line-height: 1.4; }

/* === CARD GRID === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  color: var(--text);
  display: block;
}

a.card:hover {
  border-color: var(--border-alt);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  text-decoration: none;
  color: var(--text);
}

.card h3 {
  margin-top: 0;
  font-size: 1rem;
  font-weight: 600;
}

.card p {
  color: var(--text-alt);
  font-size: 0.82rem;
  margin-bottom: 0;
}

.card .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--link);
  margin-bottom: var(--space-sm);
}

/* === AFFILIATE DISCLAIMER === */
.affiliate-disclaimer {
  font-size: 0.75rem;
  color: var(--text-alt);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: var(--space-xl);
}

/* === HIGHLIGHT BOX === */
.highlight-box {
  background: #f0f7ff;
  border-left: 3px solid var(--link);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
  font-size: 0.85rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  html { font-size: 15px; }

  .site-header { padding: 0 var(--space-md); }

  .site-nav a:not(.btn) { display: none; }

	  .tool-actions {
	    gap: 6px;
	    padding: var(--space-sm);
	  }

	  .tool-actions .btn--large {
	    width: 100%;
	  }

  .word-count { margin-left: auto; font-size: 0.65rem; }

  .features-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* === FOCUS === */
:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 1px;
}

/* === PRINT === */
@media print {
  .site-header, .site-footer, .tool-actions, .btn { display: none; }
  body { background: white; }
  .tool-stage { box-shadow: none; border: 1px solid #ccc; }
}