*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand-teal:#0d9488;
  --brand-teal-light:#ccfbf1;
  --brand-teal-mid:rgba(13,148,136,.12);
  --brand-dark:#111827;
  --brand-navy:#1a1a2e;
  --brand-amber:#f59e0b;
  --3b-blue:#001fff;
  --3b-green:#00ff36;
  --3b-purple:#ae00ff;
  --3b-blue-light:rgba(0,31,255,.08);
  --3b-green-light:rgba(0,255,54,.10);
  --3b-purple-light:rgba(174,0,255,.08);
  --bg-light:#f8fafb;
  --text-primary:#1e293b;
  --text-body:#334155;
  --text-muted:#64748b;
  --text-faint:#94a3b8;
  --border-light:#e2e8f0;
  --radius:10px;
  --radius-lg:16px;
  --radius-xl:20px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.06);
  --shadow-md:0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:0 8px 30px rgba(0,0,0,.10);
  --font-display:'Plus Jakarta Sans',system-ui,sans-serif;
  --font-body:'DM Sans','Plus Jakarta Sans',system-ui,sans-serif;
  --container:1120px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-body);color:var(--text-body);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--brand-teal);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* Nav */
.site-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--container);margin:0 auto}
.site-nav-brand{font-family:var(--font-display);font-weight:800;font-size:1.25rem;color:var(--brand-dark);letter-spacing:-.02em;text-decoration:none}
.site-nav-brand:hover{text-decoration:none}
.site-nav-links{display:flex;gap:8px;align-items:center}
.site-nav-links a{font-family:var(--font-display);font-size:.82rem;font-weight:500;color:var(--text-muted);padding:6px 12px;border-radius:var(--radius);text-decoration:none;transition:color .15s}
.site-nav-links a:hover{color:var(--brand-teal);text-decoration:none}
.site-nav-links a.is-active{color:var(--brand-teal);font-weight:600}
.site-nav-actions{display:flex;gap:12px;align-items:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:600;font-size:.9rem;border-radius:var(--radius);padding:11px 24px;border:none;cursor:pointer;transition:all .2s ease;text-decoration:none}
.btn-primary{background:var(--brand-teal);color:#fff}
.btn-primary:hover{background:#0f766e;text-decoration:none}
.btn-secondary{background:transparent;color:var(--brand-teal);border:1.5px solid var(--brand-teal)}
.btn-secondary:hover{background:var(--brand-teal-mid);text-decoration:none}
.btn-ghost{background:transparent;color:var(--text-muted);padding:11px 16px}
.btn-ghost:hover{color:var(--brand-teal);text-decoration:none}
.btn-sm{font-size:.82rem;padding:8px 18px}

/* Hero */
.marketing-hero{padding:64px 0 72px;background:linear-gradient(165deg,rgba(0,31,255,.04) 0%,#fff 30%,rgba(0,255,54,.03) 65%,rgba(174,0,255,.03) 100%)}
.marketing-hero-grid{display:grid;grid-template-columns:1fr 420px;gap:56px;align-items:start}
.marketing-hero-grid-single{grid-template-columns:1fr;max-width:720px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--3b-blue);margin-bottom:20px}
.hero-eyebrow-dot{width:7px;height:7px;border-radius:50%;background:var(--3b-green);flex-shrink:0}
.marketing-hero-title{font-family:var(--font-display);font-size:2.65rem;font-weight:800;line-height:1.15;color:var(--brand-dark);letter-spacing:-.03em;margin-bottom:16px;max-width:700px}
.marketing-hero-subtitle{font-size:1.05rem;font-weight:500;color:var(--text-body);margin-bottom:8px;max-width:640px;line-height:1.55}
.marketing-hero-body{font-size:.92rem;color:var(--text-muted);margin-bottom:28px;max-width:600px;line-height:1.6}
.marketing-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.marketing-trust-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.hero-pill{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:500;color:var(--text-muted);background:var(--bg-light);border:1px solid var(--border-light);border-radius:100px;padding:5px 14px}
.hero-pill-accent{background:var(--3b-blue-light);color:var(--3b-blue);border-color:rgba(0,31,255,.12);font-weight:600}
.hero-support-copy{font-size:.82rem;color:var(--text-faint)}

/* Selector Card (homepage) */
.selector-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);overflow:hidden;position:relative}
.selector-accent-bar{height:4px;background:linear-gradient(90deg,var(--3b-blue),var(--3b-green),var(--3b-purple))}
.selector-header{display:flex;justify-content:space-between;align-items:flex-start;padding:24px 24px 0}
.selector-label{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--3b-blue);margin-bottom:4px}
.selector-title{font-family:var(--font-display);font-size:1.15rem;font-weight:700;color:var(--brand-dark);line-height:1.3}
.selector-subtitle{font-size:.85rem;color:var(--text-muted);margin-top:4px;line-height:1.5}
.selector-logo{width:44px;height:44px;background:var(--3b-blue);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:800;color:#fff;font-size:1.1rem;flex-shrink:0}
.selector-body{padding:20px 24px 24px}
.field{margin-bottom:14px}
.field-label{display:block;font-size:.78rem;font-weight:600;color:var(--text-body);margin-bottom:5px}
.field-select{width:100%;padding:10px 14px;border:1.5px solid var(--border-light);border-radius:var(--radius);font-size:.88rem;font-family:var(--font-body);color:var(--text-body);background:#fff;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.field-select:disabled{opacity:.5;cursor:not-allowed}
.selected-lesson-box{background:var(--bg-light);border:1px solid var(--border-light);border-radius:var(--radius);padding:14px 16px;margin-bottom:16px}
.selected-lesson-label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);margin-bottom:3px}
.selected-lesson-name{font-size:.9rem;font-weight:600;color:var(--text-body)}
.selector-actions{display:flex;gap:10px}
.selector-actions .btn{flex:1;text-align:center}

/* Demo Chat */
.homepage-demo-section{background:var(--bg-light);padding:72px 0}
.homepage-demo-shell{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.homepage-demo-title{font-family:var(--font-display);font-size:1.7rem;font-weight:700;color:var(--brand-dark);margin:8px 0 12px;line-height:1.25}
.homepage-demo-body{font-size:.95rem;color:var(--text-body);line-height:1.6;max-width:480px}
.homepage-demo-preview{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);overflow:hidden}
.homepage-demo-thread{padding:24px}
.homepage-demo-message{margin-bottom:20px;padding:16px 18px;border-radius:var(--radius-lg);font-size:.9rem;line-height:1.6}
.homepage-demo-message:last-child{margin-bottom:0}
.homepage-demo-message.is-user{background:var(--3b-blue-light);border:1px solid rgba(0,31,255,.1)}
.homepage-demo-message.is-assistant{background:var(--bg-light);border:1px solid var(--border-light)}
.homepage-demo-message-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;color:var(--3b-blue)}
.homepage-demo-message.is-assistant .homepage-demo-message-label{color:var(--3b-purple)}
.homepage-demo-message p{margin-bottom:8px}
.homepage-demo-message p:last-child{margin-bottom:0}

/* Spotlight Cards */
.homepage-spotlight-section{padding:72px 0}
.marketing-card-grid-two{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.marketing-card-grid-three{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.marketing-card-grid-four{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.marketing-value-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:32px;box-shadow:var(--shadow-sm)}
.marketing-card-kicker{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--3b-blue);margin-bottom:10px}
.marketing-card-title{font-family:var(--font-display);font-size:1.35rem;font-weight:700;color:var(--brand-dark);margin-bottom:10px;line-height:1.3}
.marketing-card-body{font-size:.9rem;color:var(--text-body);line-height:1.6}
.homepage-tool-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.homepage-spotlight-card-publisher{background:var(--brand-navy);border-color:transparent}
.homepage-spotlight-card-publisher .marketing-card-kicker{color:var(--3b-green)}
.homepage-spotlight-card-publisher .marketing-card-title{color:#fff}
.homepage-spotlight-card-publisher .marketing-card-body{color:rgba(255,255,255,.75)}

/* Value Cards */
.values-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:72px 0}
.value-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s}
.value-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.value-kicker{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px;display:inline-block;padding:4px 10px;border-radius:6px}
.value-kicker--blue{background:var(--3b-blue-light);color:var(--3b-blue)}
.value-kicker--orange{background:var(--3b-green-light);color:#059a1e}
.value-kicker--green{background:var(--3b-purple-light);color:var(--3b-purple)}
.value-kicker--violet{background:rgba(0,31,255,.06);color:#3a3adc}
.value-title{font-family:var(--font-display);font-size:1.08rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.value-body{font-size:.85rem;color:var(--text-muted);line-height:1.55}

/* Moderation Card */
.moderation-card{background:var(--brand-navy);border-radius:var(--radius-xl);padding:48px;display:grid;grid-template-columns:1fr 280px;gap:48px;align-items:start;margin:72px 0}
.moderation-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--3b-green);margin-bottom:16px}
.moderation-eyebrow-dot{width:7px;height:7px;border-radius:50%;background:var(--3b-green);flex-shrink:0}
.moderation-title{font-family:var(--font-display);font-size:1.7rem;font-weight:700;color:#fff;margin-bottom:12px;line-height:1.25}
.moderation-body{font-size:.92rem;color:rgba(255,255,255,.7);line-height:1.6;margin-bottom:28px;max-width:560px}
.moderation-features{display:flex;flex-direction:column;gap:18px}
.moderation-feature{display:flex;gap:14px;align-items:flex-start}
.moderation-feature-icon{width:32px;height:32px;border-radius:50%;background:rgba(174,0,255,.15);color:var(--3b-purple);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:.85rem;flex-shrink:0}
.moderation-feature-text{font-size:.85rem;line-height:1.5}
.moderation-feature-text strong{color:#fff;display:block;margin-bottom:2px}
.moderation-feature-text span{color:rgba(255,255,255,.6)}
.moderation-status-strip{display:flex;flex-direction:column;gap:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);padding:24px}
.moderation-stat{display:flex;justify-content:space-between;align-items:center}
.moderation-stat-label{font-size:.78rem;color:rgba(255,255,255,.5);font-weight:500}
.moderation-stat-value--green{font-size:.78rem;font-weight:700;color:var(--3b-green)}
.moderation-stat-value--red{font-size:.78rem;font-weight:700;color:#f87171}

/* Story Grid */
.marketing-story-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:0 0 80px}
.marketing-story-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:32px;box-shadow:var(--shadow-sm)}
.marketing-story-card-wide{grid-column:span 2}
.marketing-story-eyebrow{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--3b-blue);margin-bottom:10px}
.marketing-story-title{font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.marketing-story-body{font-size:.9rem;color:var(--text-body);line-height:1.6}

/* Section Spacing */
.landing-section{padding:72px 0}
.landing-section-alt{background:var(--bg-light)}
.landing-section-tight{padding:48px 0}

/* Section Header */
.landing-section-header{margin-bottom:32px}
.landing-section-header .marketing-card-kicker{margin-bottom:8px}
.landing-section-header h2{font-family:var(--font-display);font-size:1.7rem;font-weight:700;color:var(--brand-dark);line-height:1.25}
.landing-section-header p{font-size:.95rem;color:var(--text-body);line-height:1.6;margin-top:10px;max-width:700px}

/* Steps Grid */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-sm)}
.step-number{font-family:var(--font-display);font-weight:800;font-size:1.5rem;color:var(--3b-blue);margin-bottom:10px}
.step-title{font-family:var(--font-display);font-size:1.05rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.step-body{font-size:.85rem;color:var(--text-muted);line-height:1.55}

/* Stat Row */
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.stat-pill{font-size:.78rem;font-weight:600;color:var(--3b-blue);background:var(--3b-blue-light);border:1px solid rgba(0,31,255,.1);border-radius:100px;padding:6px 16px}

/* CTA Band */
.cta-band{background:var(--brand-navy);border-radius:var(--radius-xl);padding:48px;display:flex;justify-content:space-between;align-items:center;gap:32px;margin:40px 0}
.cta-band h2{font-family:var(--font-display);font-size:1.5rem;font-weight:700;color:#fff;margin-bottom:8px;line-height:1.3}
.cta-band p{font-size:.9rem;color:rgba(255,255,255,.7);line-height:1.6;max-width:560px}
.cta-band-actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap}

/* Pricing Cards */
.pricing-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:32px;box-shadow:var(--shadow-sm)}
.pricing-plan-name{font-family:var(--font-display);font-size:1.1rem;font-weight:700;color:var(--brand-dark);margin-bottom:4px}
.pricing-plan-price{font-family:var(--font-display);font-size:1.8rem;font-weight:800;color:var(--3b-blue);margin-bottom:8px}
.pricing-plan-summary{font-size:.88rem;color:var(--text-muted);line-height:1.5;margin-bottom:16px}
.pricing-feature-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.pricing-feature-list li{font-size:.85rem;color:var(--text-body);padding-left:20px;position:relative;line-height:1.5}
.pricing-feature-list li::before{content:"\2713";position:absolute;left:0;color:var(--3b-green);font-weight:700}
.pricing-school-note{text-align:center;margin-top:24px;padding:20px;background:var(--bg-light);border-radius:var(--radius);font-size:.88rem;color:var(--text-muted)}
.pricing-school-note strong{color:var(--brand-dark);display:block;margin-bottom:4px}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:24px;box-shadow:var(--shadow-sm)}
.faq-question{font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.faq-answer{font-size:.88rem;color:var(--text-muted);line-height:1.55}

/* Auth Forms */
.landing-auth-section{padding:64px 0 80px}
.landing-auth-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:40px;max-width:560px;margin:0 auto}
.landing-auth-card-wide{max-width:720px}
.landing-auth-card h1{font-family:var(--font-display);font-size:1.6rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.landing-auth-card .auth-subtitle{font-size:.92rem;color:var(--text-muted);margin-bottom:24px;line-height:1.5}
.landing-auth-card .form-group{margin-bottom:16px}
.landing-auth-card .form-group label{display:block;font-size:.82rem;font-weight:600;color:var(--text-body);margin-bottom:5px}
.landing-auth-card .form-control{width:100%;padding:10px 14px;border:1.5px solid var(--border-light);border-radius:var(--radius);font-size:.88rem;font-family:var(--font-body);color:var(--text-body);background:#fff;transition:border-color .15s}
.landing-auth-card .form-control:focus{outline:none;border-color:var(--brand-teal)}
.landing-auth-card select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.landing-auth-card .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.landing-auth-card .form-help{font-size:.78rem;color:var(--text-faint);margin-top:4px}
.landing-auth-card .checkbox-row{display:flex;align-items:flex-start;gap:8px;font-size:.85rem;color:var(--text-body);margin:16px 0;cursor:pointer}
.landing-auth-card .checkbox-row input{margin-top:3px}
.landing-auth-card .auth-actions{margin-top:20px;display:flex;gap:12px;flex-wrap:wrap}
.landing-auth-card .auth-footer{margin-top:20px;font-size:.85rem;color:var(--text-muted);text-align:center}
.landing-auth-card .auth-divider{text-align:center;color:var(--text-faint);font-size:.78rem;margin:16px 0;position:relative}
.landing-auth-card .auth-divider::before,.landing-auth-card .auth-divider::after{content:"";position:absolute;top:50%;width:40%;height:1px;background:var(--border-light)}
.landing-auth-card .auth-divider::before{left:0}
.landing-auth-card .auth-divider::after{right:0}

/* Subject Tags */
.subject-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.subject-tag{font-size:.75rem;font-weight:500;color:var(--text-muted);background:var(--bg-light);border:1px solid var(--border-light);border-radius:100px;padding:4px 12px}

/* Use-Case Cards */
.use-case-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.use-case-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-sm)}
.use-case-card h3{font-family:var(--font-display);font-size:1.05rem;font-weight:700;color:var(--brand-dark);margin-bottom:8px;line-height:1.3}
.use-case-card p{font-size:.85rem;color:var(--text-muted);line-height:1.55}

/* Footer */
.site-footer{background:var(--brand-navy);padding:40px 24px;color:rgba(255,255,255,.5);border-top:3px solid;border-image:linear-gradient(90deg,var(--3b-blue),var(--3b-green),var(--3b-purple)) 1}
.site-footer-inner{max-width:var(--container);margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.site-footer-brand{font-family:var(--font-display);font-weight:700;color:#fff;font-size:.95rem}
.site-footer-brand small{display:block;font-weight:400;color:rgba(255,255,255,.4);font-size:.78rem;margin-top:2px;font-style:italic}
.site-footer-links{display:flex;gap:24px;font-size:.82rem}
.site-footer-links a{color:rgba(255,255,255,.55);text-decoration:none}
.site-footer-links a:hover{color:#fff;text-decoration:underline}
.site-footer-copy{font-size:.75rem;width:100%;text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.06);margin-top:16px}

/* Flash Messages */
.landing-flash-stack{padding:12px 0}
.landing-alert{padding:14px 20px;border-radius:var(--radius);font-size:.88rem;margin-bottom:8px}
.landing-alert-danger{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}
.landing-alert-success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.landing-alert-info{background:var(--3b-blue-light);color:var(--3b-blue);border:1px solid rgba(0,31,255,.12)}
.landing-alert strong{display:inline;margin-right:6px}

/* Responsive */
@media(max-width:1024px){
  .marketing-hero-grid{grid-template-columns:1fr;gap:40px}
  .selector-card{max-width:480px}
  .marketing-hero-title{font-size:2.1rem}
  .moderation-card{grid-template-columns:1fr;padding:36px}
  .steps-grid,.marketing-card-grid-four{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;text-align:center}
}
@media(max-width:768px){
  .marketing-card-grid-two,.marketing-card-grid-three,.values-grid,.faq-grid,.use-case-grid{grid-template-columns:1fr}
  .steps-grid,.marketing-card-grid-four{grid-template-columns:1fr}
  .homepage-demo-shell{grid-template-columns:1fr}
  .marketing-story-grid{grid-template-columns:1fr}
  .marketing-story-card-wide{grid-column:span 1}
  .marketing-hero-title{font-size:1.75rem}
  .marketing-hero-actions{flex-direction:column}
  .marketing-hero-actions .btn{width:100%}
  .selector-actions{flex-direction:column}
  .selector-actions .btn{width:100%}
  .site-footer-inner{flex-direction:column;text-align:center}
  .site-footer-links{justify-content:center;flex-wrap:wrap}
  .site-nav-links{display:none}
  .landing-auth-card .form-grid{grid-template-columns:1fr}
  .cta-band-actions{justify-content:center}
}