:root{--bg-primary: #FFFFFF;--bg-secondary: #F5F4F0;--surface: #F5F4F0;--surface-hover: #EFECE6;--surface-active: #E6E3DC;--text-primary: #2C2C2A;--text-secondary: #5E5D57;--text-muted: #5E5D57;--text-disabled: #B8B6AD;--border-subtle: #D3D1C7;--border-default: #D3D1C7;--border-strong: #A8A69C;--border-focus: #185FA5;--accent-solid: #185FA5;--accent-hover: #134D85;--accent-active: #0F3D69;--accent-surface: #E6F1FB;--accent-tint: #E6F1FB;--accent-text: #185FA5;--accent-contrast: #FFFFFF;--focus-ring: #185FA5;--success: #3B6D11;--danger: #A32D2D;--warning: #854F0B;--info: #185FA5;--font-family-serif: "Source Serif 4", Georgia, "Times New Roman", serif;--font-family-sans: "Inter", -apple-system, "Segoe UI", sans-serif;--font-family-mono: "JetBrains Mono", "Courier New", monospace;--font-family-base: var(--font-family-sans);--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-7: 2.5rem;--space-8: 3rem;--space-9: 4rem;--space-10: 5rem;--space-11: 6rem;--space-12: 7.5rem;--space-13: 10rem;--radius-xs: 2px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 16px;--radius-full: 9999px;--content-readable: 72ch;--content-main: 1200px;--page-gutter: clamp(1rem, .5rem + 2vw, 3rem);--section-space: clamp(3.5rem, 2.5rem + 3vw, 6rem)}*{box-sizing:border-box;margin:0;padding:0}html{overflow-x:clip;scroll-behavior:smooth;font-size:16px}body{width:100%;max-width:100%;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-family-sans);font-size:1rem;font-weight:400;line-height:1.6;overflow-x:clip;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}section[id]{scroll-margin-top:calc(var(--space-10) + 1.5rem)}::selection{background-color:var(--accent-surface);color:var(--accent-solid)}:focus-visible{outline:2px solid 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.15s ease}a:hover{color:var(--accent-hover)}.container{width:min(calc(100% - 2 * var(--page-gutter)),var(--content-main));margin-inline:auto}.prose{max-inline-size:var(--content-readable)}.section{padding-block:var(--section-space)}.section-wrapper{padding-block:var(--section-space);border-bottom:1px solid var(--border-subtle)}.split-section{display:grid;grid-template-columns:1fr;gap:var(--space-6)}@media(min-width:768px){.split-section{grid-template-columns:1fr 1fr}}.grid-3{display:grid;grid-template-columns:1fr;gap:var(--space-6)}@media(min-width:768px){.grid-3{grid-template-columns:repeat(3,1fr)}}.legal-container{padding-block:var(--section-space);max-width:860px}.legal-header{margin-bottom:var(--space-8);border-bottom:1px solid var(--border-subtle);padding-bottom:var(--space-6)}.legal-header-meta{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);font-family:var(--font-family-sans);font-size:.875rem}.legal-header-meta a{color:var(--accent-solid);text-decoration:none;font-weight:500}.legal-header-meta a:hover{color:var(--accent-hover);text-decoration:underline}.legal-date{color:var(--text-secondary);font-size:.875rem;margin-top:var(--space-2)}.legal-content h2{margin-top:var(--space-8);margin-bottom:var(--space-3);font-size:1.5rem}.legal-content h3{margin-top:var(--space-6);margin-bottom:var(--space-3);font-size:1.25rem}.legal-content p{color:var(--text-primary);margin-bottom:var(--space-4);line-height:1.65}.legal-content ul,.legal-content ol{margin-bottom:var(--space-5);padding-left:var(--space-6);color:var(--text-primary)}.legal-content li{margin-bottom:var(--space-2);line-height:1.6}.legal-content strong{font-weight:600;color:var(--text-primary)}.legal-content code{font-family:var(--font-family-mono);font-size:.875em;background-color:var(--surface);padding:.15em .4em;border-radius:var(--radius-xs);border:1px solid var(--border-subtle)}.legal-table-wrap{width:100%;overflow-x:auto;margin-block:var(--space-6);border:1px solid var(--border-subtle);border-radius:var(--radius-md);background-color:var(--bg-primary)}.legal-table{width:100%;border-collapse:collapse;font-size:.875rem;text-align:left}.legal-table th,.legal-table td{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--border-subtle);vertical-align:top}.legal-table th{background-color:var(--surface);font-weight:600;color:var(--text-primary)}.legal-table tr:last-child td{border-bottom:none}.legal-callout{background-color:var(--surface);border-left:3px solid var(--accent-solid);padding:var(--space-4) var(--space-5);border-radius:0 var(--radius-md) var(--radius-md) 0;margin-block:var(--space-5)}.legal-callout p{margin-bottom:0;font-size:.9375rem;color:var(--text-primary)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.btn,.btn-mechanical,.btn-mechanical-secondary{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:44px;padding:.75em 1.25em;font-family:var(--font-family-sans);font-size:.875rem;font-weight:500;line-height:1;text-decoration:none;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all .15s ease}@media(min-width:768px){.btn,.btn-mechanical{font-size:.9375rem}}@media(min-width:1024px){.btn,.btn-mechanical{font-size:1rem}}.btn-primary,.btn-mechanical,a.btn-primary,a.btn-mechanical{background-color:var(--accent-solid);color:var(--accent-contrast);border-color:var(--accent-solid)}.btn-primary:hover,.btn-mechanical:hover,a.btn-primary:hover,a.btn-mechanical:hover{background-color:var(--accent-hover);border-color:var(--accent-hover);color:var(--accent-contrast)}.btn-primary:active,.btn-mechanical:active,a.btn-primary:active,a.btn-mechanical:active{background-color:var(--accent-active);border-color:var(--accent-active);color:var(--accent-contrast);transform:translateY(1px)}.btn-secondary,.btn-mechanical-secondary{background-color:var(--surface);color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius-md)}.btn-secondary:hover,.btn-mechanical-secondary:hover{background-color:var(--surface-hover);border-color:var(--border-strong);color:var(--text-primary)}.card,.problem-card,.proof-card,.fit-card,.content-card{background-color:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);display:flex;flex-direction:column;gap:var(--space-3);transition:border-color .2s ease}.card:hover,.problem-card:hover,.proof-card:hover,.content-card:hover{border-color:var(--border-strong)}.card h2,.card h3,.problem-card h3,.proof-card h3,.content-card h2,.content-card h3,.fit-card h2,.fit-card h3{font-family:var(--font-family-serif);font-size:1.25rem;line-height:1.35;font-weight:500;letter-spacing:-.01em;color:var(--text-primary);margin:0}.card p,.problem-card p,.proof-card p,.content-card p,.fit-card p{color:var(--text-secondary);font-size:.9375rem;line-height:1.6;margin:0}.form-group{margin-bottom:var(--space-4);display:flex;flex-direction:column;gap:var(--space-2)}label{display:block;font-weight:500;color:var(--text-primary);font-size:.875rem}input,select,textarea{width:100%;min-height:44px;padding:var(--space-3) var(--space-4);font-family:var(--font-family-sans);font-size:1rem;color:var(--text-primary);background-color:var(--surface);border:1px solid var(--border-default);border-radius:var(--radius-md);transition:border-color .15s ease}input:hover,select:hover,textarea:hover{border-color:var(--border-strong)}body.keyboard-nav input:focus,body.keyboard-nav select:focus,body.keyboard-nav textarea:focus{outline:2px solid var(--focus-ring);outline-offset:2px;border-color:var(--focus-ring)}input:focus,select:focus,textarea:focus{outline:none;box-shadow:none}input::placeholder,textarea::placeholder{color:var(--text-muted)}.cookie-banner{display:none;position:fixed;bottom:24px;left:24px;right:24px;max-width:980px;margin:0 auto;background-color:var(--surface);border:1px solid var(--border-default);border-radius:var(--radius-xl);padding:var(--space-5) var(--space-6);box-shadow:0 20px 48px -10px #2c2c2a38,0 4px 16px #2c2c2a14;z-index:1100;animation:cookieBannerSlideUp .28s cubic-bezier(.16,1,.3,1)}.cookie-banner.is-visible{display:block}@keyframes cookieBannerSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.cookie-banner-content{display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);flex-wrap:wrap}.cookie-banner-text{flex:1 1 340px}.cookie-banner-title{font-family:var(--font-family-serif);font-size:1.125rem;font-weight:500;color:var(--text-primary);margin-bottom:var(--space-1)}.cookie-banner-desc{font-family:var(--font-family-sans);font-size:.875rem;color:var(--text-secondary);line-height:1.5;margin:0}.cookie-policy-link{color:var(--accent-solid);text-decoration:underline;text-underline-offset:3px;font-weight:500}.cookie-banner-actions{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.btn-cookie-primary{background-color:var(--accent-solid);color:#fff;border:1px solid var(--accent-solid);border-radius:var(--radius-full);padding:10px 20px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-family-sans);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s ease;white-space:nowrap}.btn-cookie-primary:hover{background-color:var(--accent-hover);border-color:var(--accent-hover)}.btn-cookie-secondary{background-color:transparent;color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius-full);padding:10px 20px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-family-sans);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s ease;white-space:nowrap}.btn-cookie-secondary:hover{background-color:var(--surface-hover);border-color:var(--border-strong)}.btn-cookie-ghost{background-color:transparent;color:var(--text-secondary);border:1px solid transparent;border-radius:var(--radius-full);padding:10px 16px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-family-sans);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s 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var(--border-subtle);display:flex;align-items:flex-start;justify-content:space-between;background-color:var(--surface)}.cookie-modal-title{font-family:var(--font-family-serif);font-size:1.25rem;font-weight:500;color:var(--text-primary);margin:0}.cookie-modal-subtitle{font-size:.8125rem;color:var(--text-secondary);margin:4px 0 0}.cookie-modal-close{background:transparent;border:none;font-size:1.75rem;line-height:1;color:var(--text-secondary);cursor:pointer;padding:0 6px;border-radius:var(--radius-sm);transition:color .15s ease}.cookie-modal-close:hover{color:var(--text-primary)}.cookie-modal-body{padding:var(--space-5) var(--space-6);overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-4);max-height:60vh}.cookie-category-item{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4);padding-bottom:var(--space-4);border-bottom:1px solid var(--border-subtle)}.cookie-category-item:last-child{border-bottom:none;padding-bottom:0}.cookie-category-info{flex:1}.cookie-category-header{display:flex;align-items:center;gap:var(--space-2)}.cookie-category-name{font-weight:600;font-size:.9375rem;color:var(--text-primary)}.cookie-badge-locked{display:inline-block;font-size:.6875rem;font-weight:600;text-transform:uppercase;background-color:var(--accent-surface);color:var(--accent-solid);padding:2px 8px;border-radius:var(--radius-full)}.cookie-category-text{font-size:.8125rem;color:var(--text-secondary);line-height:1.45;margin:4px 0 0}.cookie-toggle-wrap{display:flex;align-items:center;padding-top:2px}.cookie-checkbox{width:20px;height:20px;accent-color:var(--accent-solid);cursor:pointer}.cookie-modal-footer{padding:var(--space-4) var(--space-6);border-top:1px solid var(--border-subtle);background-color:var(--surface);display:flex;align-items:center;justify-content:flex-end;gap:var(--space-3);flex-wrap:wrap}.cookie-privacy-trigger{position:fixed;bottom:24px;left:24px;width:42px;height:42px;border-radius:50%;background-color:var(--bg-primary);border:1px solid var(--border-default);box-shadow:0 4px 16px #2c2c2a1f;color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:998;transition:all .2s cubic-bezier(.16,1,.3,1)}.cookie-privacy-trigger:hover{color:var(--accent-solid);border-color:var(--accent-solid);transform:translateY(-2px);box-shadow:0 6px 20px #185fa52e}@media(max-width:768px){.cookie-banner{bottom:12px;left:12px;right:12px;padding:var(--space-4)}.cookie-banner-actions{width:100%;justify-content:stretch}.cookie-banner-actions button{flex:1 1 auto;text-align:center}.cookie-privacy-trigger{bottom:16px;left:16px;width:38px;height:38px}}html.is-offline .hero-cta-prompt,html.is-offline .hero-prompt-container,html.is-offline .ai-bubble-launcher,html.is-offline .ai-lateral-widget,html.is-offline .doubt-subheadline,html.is-offline .doubt-prompt-box,html.is-offline .header-cta,html.is-offline [data-requires-online]{display:none!important}.hero-prompt-container{max-width:720px;width:100%;margin:0 auto;background-color:var(--bg-primary);border:1px solid var(--border-default);border-radius:var(--radius-full);box-shadow:0 8px 30px -6px #2c2c2a14,0 2px 6px -1px #2c2c2a0a;transition:border-color .2s ease,box-shadow .2s ease;overflow:hidden}.hero-prompt-container:hover{border-color:var(--accent-solid);box-shadow:0 12px 36px -6px #185fa524,0 2px 8px #2c2c2a0a}.ai-prompt-bar{display:flex;align-items:center;gap:var(--space-3);padding:8px 12px 8px 22px;min-height:60px;background-color:transparent;transition:all .3s ease;width:100%;box-sizing:border-box}.ai-prompt-sparkle{display:flex;align-items:center;justify-content:center;color:var(--accent-solid);flex-shrink:0;transition:transform .3s cubic-bezier(.16,1,.3,1)}.hero-prompt-container:hover .ai-prompt-sparkle{transform:rotate(20deg) scale(1.1)}.ai-prompt-input{flex:1;min-width:0;border:none!important;background:transparent;font-family:var(--font-family-sans);font-size:1rem;color:var(--text-primary);outline:none;line-height:1.4;padding:8px 14px;box-sizing:border-box;height:40px;border-radius:var(--radius-md);transition:outline-color .15s ease}.ai-prompt-input:focus{outline:none!important;box-shadow:none!important;border:none!important}body.keyboard-nav .ai-prompt-input:focus{outline:2px solid var(--focus-ring)!important;outline-offset:2px!important}.ai-prompt-input::placeholder{color:var(--text-muted)}.ai-round-btn{width:44px!important;height:44px!important;min-width:44px!important;min-height:44px!important;max-width:44px!important;max-height:44px!important;padding:0!important;border-radius:50%!important;background-color:var(--accent-solid);color:#fff;border:none!important;display:inline-flex!important;align-items:center!important;justify-content:center!important;cursor:pointer;flex-shrink:0;margin:0;box-sizing:border-box;transition:transform .2s cubic-bezier(.16,1,.3,1),background-color .15s ease,box-shadow .2s ease}.ai-round-btn svg{width:20px!important;height:20px!important;min-width:20px!important;min-height:20px!important;stroke:#fff!important;stroke-width:2.5!important;display:block;flex-shrink:0;margin:auto;transition:transform .15s ease}.ai-round-btn:hover{background-color:var(--accent-hover);transform:scale(1.06);box-shadow:0 4px 12px #185fa54d}.ai-round-btn:hover svg{transform:translateY(-1px)}.ai-round-btn:active{transform:scale(.96)}.ai-round-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.ai-round-btn:focus-visible{outline:2px solid var(--focus-ring)!important;outline-offset:2px!important}.ai-round-btn:focus:not(:focus-visible){outline:none!important;box-shadow:none!important}.ai-bubble-launcher{position:fixed;bottom:24px;right:24px;z-index:999;display:none;align-items:center;gap:10px;padding:6px 16px 6px 6px;background-color:var(--bg-primary);border:1px solid var(--border-default);border-radius:var(--radius-full);box-shadow:0 10px 30px -4px #2c2c2a29,0 2px 8px #2c2c2a0f;cursor:pointer;transition:transform .3s cubic-bezier(.16,1,.3,1),box-shadow .3s cubic-bezier(.16,1,.3,1),opacity .3s cubic-bezier(.16,1,.3,1),visibility .3s;transform:translateY(0) scale(1);opacity:1;visibility:visible}.ai-bubble-launcher.is-active-user{display:inline-flex}.ai-bubble-launcher:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 16px 36px -4px #185fa538,0 4px 12px #2c2c2a14;border-color:var(--accent-solid)}.ai-bubble-launcher:active{transform:scale(.98)}.ai-bubble-launcher.is-hidden{opacity:0;visibility:hidden;transform:translateY(16px) scale(.85);pointer-events:none}.bubble-avatar{width:36px;height:36px;border-radius:50%;background-color:var(--accent-solid);color:#fff;font-family:var(--font-family-mono);font-size:.8125rem;font-weight:600;display:flex;align-items:center;justify-content:center;letter-spacing:-.02em;position:relative;flex-shrink:0}.bubble-avatar img,.lateral-avatar img{width:100%;height:100%;border-radius:inherit;display:block;object-fit:cover}.bubble-status-dot{position:absolute;bottom:0;right:0;width:10px;height:10px;border-radius:50%;background-color:var(--success);border:2px solid 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