/* Kno v3 — Landing Page (Clean Dark, Arc-style) */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;padding:14px 0;transition:var(--transition)}
.navbar.scrolled{background:rgba(9,9,11,0.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.navbar .container{display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.05rem;letter-spacing:-0.02em}
.nav-logo-text{font-weight:800}
.nav-links{display:flex;align-items:center;gap:24px;font-size:0.88rem;font-weight:500}
.nav-links a{color:var(--text-muted);transition:color var(--transition-fast)}
.nav-links a:hover{color:var(--text-primary)}
.mobile-menu-btn{display:none;padding:8px}

.hero{min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;position:relative;overflow:hidden}
.hero .container{display:flex;flex-direction:column;align-items:center;text-align:center;position:relative;z-index:1}
.hero-badge{margin-bottom:24px;border:1px solid var(--border)}
.hero h1{margin-bottom:20px;max-width:720px;font-size:3.8rem;line-height:1.05;letter-spacing:-0.04em}
.hero p{max-width:500px;color:var(--text-secondary);margin-bottom:32px;font-size:1.05rem;line-height:1.6}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.hero-cards{display:flex;gap:16px;margin-top:56px}
.hero-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 24px;text-align:left;min-width:180px;animation:float 6s ease-in-out infinite}
.hero-card h4{font-size:0.85rem;margin-bottom:4px}
.hero-card small{font-size:0.7rem;color:var(--text-muted)}
.hero-card:nth-child(2){animation-delay:-2s}
.hero-card:nth-child(3){animation-delay:-4s}

.section{padding:100px 0}
.section-alt{background:var(--bg-secondary)}
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{margin-bottom:12px}
.section-header p{color:var(--text-secondary);max-width:500px;margin:0 auto}

.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.tool-card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;background:var(--bg-card);transition:all var(--transition)}
.tool-card:hover{border-color:var(--text-muted);transform:translateY(-3px)}
.tool-icon{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.tool-card h3{font-size:0.95rem;margin-bottom:6px}
.tool-card p{font-size:0.82rem;color:var(--text-muted);line-height:1.5}

.flow-grid{display:grid;gap:0;counter-reset:step}
.flow-step{display:flex;align-items:flex-start;gap:20px;padding:28px 0;border-bottom:1px solid var(--border)}
.flow-num{width:36px;height:36px;border-radius:var(--radius-full);background:var(--accent-bg);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.82rem;flex-shrink:0;border:1px solid var(--border)}
.flow-step h3{font-size:1rem;margin-bottom:4px}
.flow-step p{font-size:0.85rem;color:var(--text-muted)}

.cta-section{text-align:center;padding:80px 0}
.cta-section h2{margin-bottom:12px}
.cta-section p{color:var(--text-secondary);margin-bottom:24px}

.footer{border-top:1px solid var(--border);padding:32px 0;text-align:center}
.footer p{font-size:0.78rem;color:var(--text-muted)}

/* Pricing */
.pricing-page{min-height:100vh}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:960px;margin:0 auto}
.pricing-card{display:flex;flex-direction:column;gap:12px}
.pricing-featured{border-color:var(--text-muted);position:relative}
.pricing-badge{align-self:flex-start}
.pricing-price{display:flex;align-items:baseline;gap:4px}
.pricing-amount{font-size:2.5rem;font-weight:800;letter-spacing:-0.02em}
.pricing-features{display:flex;flex-direction:column;gap:8px;margin:8px 0 16px;flex:1}
.pricing-features li{display:flex;align-items:center;gap:8px;font-size:0.85rem;color:var(--text-secondary)}
.pricing-features li svg{flex-shrink:0}
.pricing-features li.text-muted svg{color:var(--text-muted)}
.pricing-features li strong{color:var(--text-primary)}

/* Auth pages */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:80px 20px}
.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:36px;width:100%;max-width:400px}
.auth-card h1{text-align:center;margin-bottom:6px;font-size:1.5rem}
.auth-card .text-muted{text-align:center;margin-bottom:24px;display:block}
.auth-switch{text-align:center;margin-top:16px;font-size:0.85rem;color:var(--text-muted)}

@media(max-width:768px){
  .hero h1{font-size:2.2rem}
  .hero-cards{flex-direction:column;align-items:center}
  .nav-links{display:none;flex-direction:column;position:absolute;top:60px;right:16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;gap:12px;box-shadow:var(--shadow-lg)}
  .nav-links.mobile-open{display:flex}
  .mobile-menu-btn{display:block}
  .tools-grid{grid-template-columns:1fr}
  .pricing-grid{grid-template-columns:1fr}
}