:root {
  --bg: #0a0a0a;
  --bg-card: #141414;
  --bg-hover: #1a1a1a;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --text-dim: #888;
  --accent: #2DD4BF;
  --accent-dim: #14B8A6;
  --red: #EF4444;
  --green: #22C55E;
  --yellow: #EAB308;
  --orange: #F97316;
  --blue: #3B82F6;
  --purple: #A855F7;
  --font-display: 'Space Mono', monospace;
  --font-body: 'IBM Plex Sans', sans-serif;
  --max-width: 1100px;
  --radius: 8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(10px);
  z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--text); }
.logo span { color: var(--accent); }
nav { display: flex; gap: 24px; align-items: center; }
nav a { color: var(--text-dim); font-size: 0.9rem; transition: color 0.2s; }
nav a:hover, nav a.active { color: var(--text); text-decoration: none; }
.mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* Hero */
.hero { text-align: center; padding: 60px 0 40px; }
.hero h1 { font-size: 2.2rem; margin-bottom: 16px; }
.hero h1 span { color: var(--accent); }
.hero p { color: var(--text-dim); font-size: 1.05rem; max-width: 650px; margin: 0 auto; }

/* Tabs */
.tab-bar {
  display: flex; gap: 4px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 4px; margin-bottom: 24px; flex-wrap: wrap;
}
.tab-btn {
  flex: 1; min-width: 100px; padding: 10px 16px; background: transparent; border: none;
  color: var(--text-dim); font-family: var(--font-body); font-size: 0.85rem;
  cursor: pointer; border-radius: 6px; transition: all 0.2s;
}
.tab-btn:hover { color: var(--text); background: var(--bg-hover); }
.tab-btn.active { background: var(--accent); color: #0a0a0a; }

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; margin-bottom: 20px;
}
.card h3 { font-size: 1rem; margin-bottom: 16px; }

/* Forms */
label { display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 4px; font-family: var(--font-display); }
input[type="number"], select {
  width: 100%; padding: 10px 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-family: var(--font-body); font-size: 0.95rem;
  transition: border-color 0.2s;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
.input-group { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin-bottom: 16px; }
.input-field { display: flex; flex-direction: column; }

/* Buttons */
.btn {
  padding: 10px 20px; border: none; border-radius: 6px; font-family: var(--font-body);
  font-size: 0.9rem; cursor: pointer; transition: all 0.2s; display: inline-flex;
  align-items: center; gap: 8px;
}
.btn-primary { background: var(--accent); color: #0a0a0a; font-weight: 600; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-secondary { background: var(--bg); border: 1px solid var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* Results */
.result-box {
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 16px; margin-top: 16px; font-family: var(--font-display); font-size: 0.9rem;
}

/* Stat Cards */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin-bottom: 20px;
}
.stat-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 16px; text-align: center;
}
.stat-value { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin-bottom: 4px; }
.stat-label { font-size: 0.8rem; color: var(--text-dim); }

/* P-value coloring */
.sig-green { color: var(--green); }
.sig-yellow { color: var(--yellow); }
.sig-red { color: var(--red); }

/* SVG chart container */
.chart-container { margin: 20px 0; overflow-x: auto; }
.chart-container svg { max-width: 100%; height: auto; }

/* Mode toggle */
.mode-toggle {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
  font-size: 0.9rem;
}
.toggle-switch {
  position: relative; width: 48px; height: 24px; background: var(--border);
  border-radius: 12px; cursor: pointer; transition: background 0.2s;
}
.toggle-switch.active { background: var(--accent); }
.toggle-switch::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 20px; height: 20px;
  background: var(--text); border-radius: 50%; transition: transform 0.2s;
}
.toggle-switch.active::after { transform: translateX(24px); }

/* Multi-variant section */
.variant-row {
  display: grid; grid-template-columns: 80px 1fr 1fr 100px; gap: 8px;
  align-items: end; margin-bottom: 8px;
}
.variant-label {
  font-family: var(--font-display); font-size: 0.9rem; font-weight: 700;
  padding: 10px 0; display: flex; align-items: center;
}
.variant-a { color: var(--accent); }
.variant-b { color: var(--blue); }
.variant-c { color: var(--purple); }
.variant-d { color: var(--orange); }

.winner-badge {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem;
  font-family: var(--font-display); background: rgba(45,212,191,0.15); color: var(--accent);
}

/* Revenue panel */
.revenue-card { border-color: rgba(45,212,191,0.3); }

/* FAQ */
.faq-section { padding: 60px 0; }
.faq-section h2 { font-size: 1.5rem; text-align: center; margin-bottom: 32px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 8px; overflow: hidden; }
.faq-q {
  padding: 16px 20px; cursor: pointer; display: flex; justify-content: space-between;
  align-items: center; font-weight: 600; font-size: 0.95rem; background: var(--bg-card); transition: background 0.2s;
}
.faq-q:hover { background: var(--bg-hover); }
.faq-q::after { content: '+'; font-family: var(--font-display); font-size: 1.2rem; color: var(--accent); }
.faq-item.open .faq-q::after { content: '-'; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; padding: 0 20px; color: var(--text-dim); font-size: 0.9rem; line-height: 1.7; }
.faq-item.open .faq-a { max-height: 500px; padding: 0 20px 16px; }

/* ============================================
   FOOTER — V14 STANDARDIZED
   Do NOT modify individual properties per site.
   This CSS is identical across all 18 domains.
   ============================================ */
.site-footer {
    border-top: 1px solid var(--border, rgba(255,255,255,0.08));
    margin-top: 4rem;
    padding: 0;
}
.footer-inner {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem 2rem 2rem;
    text-align: center;
}
.footer-brand {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text, #e4e2f0);
    letter-spacing: -0.01em;
}
.footer-tagline {
    font-size: 0.8rem;
    color: var(--text-dim, #666);
    margin-top: 0.3rem;
    margin-bottom: 1.5rem;
}
.footer-cta {
    display: inline-block;
    padding: 0.6rem 1.75rem;
    border: 1.5px solid var(--accent, #34d399);
    border-radius: 6px;
    color: var(--accent, #34d399);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}
.footer-cta:hover {
    background: var(--accent, #34d399);
    color: #000;
    text-decoration: none;
}
.footer-copy {
    font-size: 0.7rem;
    color: var(--text-dim, #555);
    margin-top: 1.25rem;
}
.footer-copy a {
    color: inherit;
    text-decoration: none;
}
.footer-copy a:hover {
    text-decoration: underline;
}
.zovo-network {
    border-top: 1px solid var(--border, rgba(255,255,255,0.08));
    padding: 2rem 2rem 3rem;
    text-align: center;
}
.zovo-network-inner {
    max-width: 720px;
    margin: 0 auto;
}
.zovo-network-title {
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text, #e4e2f0);
    text-transform: none;
    letter-spacing: 0;
    margin-bottom: 1rem;
}
.zovo-network-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem 1.25rem;
}
.zovo-network-links a {
    font-size: 0.78rem;
    color: var(--text-muted, #888);
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.15s;
    line-height: 1.9;
}
.zovo-network-links a:hover {
    color: var(--accent, #34d399);
}
@media (max-width: 640px) {
    .footer-inner {
        padding: 2.5rem 1.5rem 1.5rem;
    }
    .footer-cta {
        padding: 0.55rem 1.25rem;
        font-size: 0.8rem;
    }
    .zovo-network {
        padding: 1.5rem 1.5rem 2.5rem;
    }
    .zovo-network-links {
        gap: 0.3rem 1rem;
    }
    .zovo-network-links a {
        font-size: 0.72rem;
    }
}

/* Blog / Article */
.blog-list { list-style: none; }
.blog-item { margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.blog-item:last-child { border-bottom: none; }
.blog-item h3 a { color: var(--text); }
.blog-item h3 a:hover { color: var(--accent); }
.blog-meta { color: var(--text-dim); font-size: 0.8rem; margin-top: 4px; }
.blog-excerpt { color: var(--text-dim); margin-top: 8px; font-size: 0.9rem; }

.article { max-width: 720px; margin: 0 auto; padding: 40px 20px; }
.article h1 { font-size: 2rem; margin-bottom: 8px; }
.article .meta { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 32px; }
.article h2 { font-size: 1.3rem; margin-top: 32px; margin-bottom: 12px; }
.article h3 { font-size: 1.1rem; margin-top: 24px; margin-bottom: 8px; }
.article p { margin-bottom: 16px; color: var(--text); line-height: 1.8; }
.article ul, .article ol { margin-bottom: 16px; padding-left: 24px; }
.article li { margin-bottom: 8px; line-height: 1.7; }
.article code { font-family: var(--font-display); background: var(--bg-card); padding: 2px 6px; border-radius: 4px; font-size: 0.85em; }
.article pre { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; overflow-x: auto; margin-bottom: 16px; font-family: var(--font-display); font-size: 0.85rem; line-height: 1.5; }
.article pre code { background: none; padding: 0; }

.about-content { max-width: 720px; margin: 0 auto; padding: 60px 20px; }
.about-content h1 { font-size: 2rem; margin-bottom: 24px; }
.about-content p { margin-bottom: 16px; line-height: 1.8; }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.6rem; }
  .hero { padding: 40px 0 24px; }
  .input-group { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .variant-row { grid-template-columns: 60px 1fr 1fr; }
  .variant-row > *:last-child { display: none; }
  nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 20px; gap: 12px; }
  nav.open { display: flex; }
  .mobile-toggle { display: block; }
  .tab-btn { min-width: 70px; font-size: 0.75rem; padding: 8px 10px; }
}


/* === V5: Nav Pro + Zovo Tools === */
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.nav-pro {
  background: var(--accent);
  color: #000 !important;
  padding: 5px 13px;
  border-radius: var(--radius, 6px);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.nav-pro:hover {
  opacity: 0.85;
}

.nav-zovo {
  color: var(--text-muted, #888) !important;
  font-size: 0.78rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-zovo:hover {
  color: var(--text, #e8e8e8) !important;
}

nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}


/* === V5: Pro Nudge === */
.pro-nudge {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--accent-dim, rgba(110, 231, 183, 0.06));
  border: 1px solid var(--accent, #6ee7b7);
  border-radius: var(--radius, 8px);
  animation: v5-nudge-in 0.3s ease;
}

.pro-nudge-inner {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.pro-nudge-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
  line-height: 1.4;
}

.pro-nudge-text {
  font-size: 0.88rem;
  color: var(--text-muted, #888);
  line-height: 1.55;
}

.pro-nudge-text strong {
  color: var(--text, #e8e8e8);
}

.pro-nudge-text a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

@keyframes v5-nudge-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================================================
   Mobile Overflow Prevention — V33 Fix
   Resolves horizontal overflow at 375px viewport
   ================================================ */

/* Global overflow containment */
pre, code, samp, kbd {
  overflow-x: auto;
  max-width: 100%;
}

table {
  display: block;
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

/* Tool outputs and result containers */
.output-box,
.hash-output,
.result-box,
.tool-output,
.code-block,
.tensor-box,
.scan-result,
.token-output {
  overflow-x: auto;
  max-width: 100%;
  word-break: break-all;
}

/* Main content containers */
main,
.tool-container,
.research-content,
.answer-content,
.article-content,
.blog-post,
.article {
  overflow-x: hidden;
  max-width: 100%;
}

@media (max-width: 768px) {
  body {
    overflow-x: hidden;
  }

  pre, code, samp {
    white-space: pre-wrap;
    overflow-x: auto;
    max-width: 100%;
  }

  table {
    font-size: 0.85rem;
  }

  .output-box,
  .hash-output,
  .result-box,
  .tool-output,
  .tensor-box {
    font-size: 0.8rem;
    word-break: break-all;
    overflow-wrap: break-word;
  }
}

/* Related links grid — V35 standard */
.related-links h2 {
  margin-bottom: 1rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.related-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.2s, color 0.2s;
}

.related-card:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}