:root{--color-bg:#ffffff;--color-bg-secondary:#f8f9fa;--color-text:#1a1a2e;--color-text-secondary:#6c757d;--color-primary:#4361ee;--color-primary-hover:#3a56d4;--color-accent:#7209b7;--color-success:#06d6a0;--color-warning:#ffd166;--color-danger:#ef476f;--color-border:#e9ecef;--radius:8px;--shadow:0 1px 3px rgba(0,0,0,0.08);--shadow-lg:0 4px 20px rgba(0,0,0,0.1);--max-width:1200px}@media (prefers-color-scheme:dark){:root{--color-bg:#0f0f23;--color-bg-secondary:#1a1a2e;--color-text:#e9ecef;--color-text-secondary:#adb5bd;--color-border:#2d2d44;--shadow:0 1px 3px rgba(0,0,0,0.3);--shadow-lg:0 4px 20px rgba(0,0,0,0.4)}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.navbar{border-bottom:1px solid var(--color-border);position:-webkit-sticky;position:sticky;top:0;background:var(--color-bg);z-index:100}.navbar-inner{max-width:var(--max-width);margin:0 auto;padding:.75rem 1.5rem;display:flex;align-items:center;justify-content:space-between}.navbar-brand{font-size:1.25rem;font-weight:700;color:var(--color-text)}.navbar-brand:hover{text-decoration:none}.navbar-links{display:flex;align-items:center;gap:1rem}.navbar-user{font-size:.875rem;color:var(--color-text-secondary);padding-left:.5rem;border-left:1px solid var(--color-border)}.announcement{text-align:center;padding:.5rem 1rem;font-size:.875rem}.announcement-info{background:var(--color-primary);color:#fff}.announcement-warning{background:var(--color-warning);color:#000}.announcement-critical{background:var(--color-danger);color:#fff}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1.25rem;border-radius:var(--radius);font-size:.875rem;font-weight:500;cursor:pointer;border:none;transition:all .15s 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h1{font-size:3rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero p{font-size:1.25rem;color:var(--color-text-secondary);max-width:600px;margin:0 auto 2rem}.hero-actions{display:flex;gap:1rem;justify-content:center}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:1.5rem;gap:1.5rem;padding:2rem 0}.feature-card{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem}.feature-card h3{font-size:1.125rem;margin-bottom:.5rem}.feature-card p{color:var(--color-text-secondary);font-size:.9375rem}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:1.5rem;gap:1.5rem;padding:2rem 0}.pricing-card{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem;text-align:center}.pricing-card.featured{border-color:var(--color-primary);position:relative}.pricing-card.featured:before{content:"Popular";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--color-primary);color:#fff;padding:.125rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600}.pricing-card h3{font-size:1.25rem;margin-bottom:.5rem}.pricing-price{font-size:2.5rem;font-weight:800;margin:1rem 0}.pricing-price span{font-size:1rem;font-weight:400;color:var(--color-text-secondary)}.pricing-features{list-style:none;text-align:left;margin:1.5rem 0}.pricing-features li{padding:.375rem 0;color:var(--color-text-secondary);font-size:.9375rem}.pricing-features li:before{content:"✓ ";color:var(--color-success);font-weight:700}.form-group{margin-bottom:1.25rem}.form-group label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.375rem}.form-group input,.form-group textarea{width:100%;padding:.625rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:.9375rem;background:var(--color-bg);color:var(--color-text)}.form-group input:focus,.form-group textarea:focus{outline:2px solid var(--color-primary);outline-offset:-1px}.form-error{color:var(--color-danger);font-size:.875rem;margin-top:.5rem}.auth-card{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem;margin-top:2rem}.auth-card h1{font-size:1.5rem;margin-bottom:1.5rem;text-align:center}.auth-footer{text-align:center;margin-top:1rem;font-size:.875rem;color:var(--color-text-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:1rem;gap:1rem;margin-bottom:2rem}.stat-card{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.25rem}.stat-card .stat-label{font-size:.8125rem;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em}.stat-card .stat-value{font-size:1.75rem;font-weight:700;margin-top:.25rem}.chat-container{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius);display:flex;flex-direction:column;height:600px}.chat-messages{flex:1 1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.75rem}.chat-message{max-width:80%;padding:.75rem 1rem;border-radius:var(--radius);font-size:.9375rem;line-height:1.5;white-space:pre-wrap}.chat-message.user{background:var(--color-primary);color:#fff;align-self:flex-end;border-bottom-right-radius:2px}.chat-message.assistant{background:var(--color-bg);border:1px solid var(--color-border);align-self:flex-start;border-bottom-left-radius:2px}.chat-input-area{display:flex;gap:.5rem;padding:1rem;border-top:1px solid var(--color-border)}.chat-input-area input{flex:1 1;padding:.625rem .75rem;border:1px 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