:root{--bg-paper: #F9F8F6;--bg-surface: #FFFFFF;--border-hairline: #E5E1D8;--bg-primary: var(--bg-paper);--bg-secondary: var(--bg-surface);--bg-card: var(--bg-surface);--bg-card-hover: #F5F2EB;--border-subtle: var(--border-hairline);--border-strong: #D5D0C5;--ink-primary: #1C1917;--ink-secondary: #4B4640;--ink-muted: #7A7368;--text-primary: var(--ink-primary);--text-secondary: var(--ink-secondary);--text-muted: var(--ink-muted);--accent: #0E6E5A;--accent-strong: #0B5A49;--accent-tint: #E4F2EE;--accent-emerald: var(--accent);--accent-emerald-light: var(--accent-strong);--accent-emerald-subtle: var(--accent-tint);--wa-green: #25D366;--wa-green-hover: #1EBE5D;--radius-sm: 6px;--radius-md: 12px;--radius-full: 9999px;--shadow-card: 0 1px 3px rgba(28, 25, 23, .08);--shadow-sm: 0 1px 2px rgba(28, 25, 23, .05);--shadow-md: 0 4px 6px -1px rgba(28, 25, 23, .07);--font-heading: "Lora", Georgia, serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-sans: "Inter", -apple-system, sans-serif;--font-mono: "JetBrains Mono", monospace;--text-meta: .8125rem;--text-body: clamp(.95rem, .9rem + .25vw, 1.0625rem);--text-body-lg: clamp(1.0625rem, 1rem + .3vw, 1.1875rem);--text-h3: clamp(1.15rem, 1.05rem + .4vw, 1.35rem);--text-h2: clamp(1.35rem, 1.2rem + .6vw, 1.65rem);--text-h1: clamp(1.65rem, 1.4rem + 1vw, 2.15rem)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-body);background-color:var(--bg-paper);color:var(--ink-secondary);line-height:1.7;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;padding-bottom:72px}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);letter-spacing:-.015em;color:var(--ink-primary);line-height:1.25}a{color:inherit;text-decoration:none}.highlight{background:var(--accent-tint);padding:.05em .3em;border-radius:.2em;color:var(--ink-primary)}.site-header{position:sticky;top:0;height:56px;background:var(--bg-paper);border-bottom:1px solid var(--border-hairline);display:flex;align-items:center;justify-content:space-between;padding:0 1rem;z-index:100}.site-header__nav-desktop{display:none;align-items:center;gap:1.25rem}.site-header__nav-mobile-btn{display:flex}@media(min-width:768px){.site-header{height:58px;padding:0 2rem}.site-header__nav-desktop{display:flex}.site-header__nav-mobile-btn{display:none}}.glass-panel{background:var(--bg-surface);border:1px solid var(--border-hairline);border-radius:var(--radius-md);box-shadow:var(--shadow-card)}.glass-card{background:var(--bg-surface);border:1px solid var(--border-hairline);border-radius:var(--radius-md);box-shadow:var(--shadow-card);transition:all .15s ease}.glass-card:hover{background:var(--bg-card-hover);border-color:var(--border-strong)}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;background:var(--wa-green);color:#06110e;font-weight:700;font-size:.95rem;padding:.85rem 1.5rem;border-radius:var(--radius-sm);border:none;cursor:pointer;box-shadow:var(--shadow-sm);transition:background .15s ease;min-height:48px;text-decoration:none}.btn-primary:hover,.btn-primary:active{background:var(--wa-green-hover)}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;background:transparent;color:var(--ink-secondary);font-weight:600;font-size:.9rem;padding:.5rem 0;border:none;border-bottom:1px solid var(--ink-secondary);cursor:pointer;transition:color .15s ease,border-color .15s ease;min-height:44px;text-decoration:none}.btn-secondary:hover{color:var(--accent);border-color:var(--accent)}.bridging-box{background:var(--accent-tint);border:1px solid rgba(14,110,90,.25);border-radius:var(--radius-sm);padding:1.25rem 1.5rem;margin:2rem 0}.bridging-box__title{font-family:var(--font-heading);font-style:italic;font-size:var(--text-h3);color:var(--ink-primary);margin-bottom:.75rem}.bridging-box__body{color:var(--ink-primary);font-size:var(--text-body);line-height:1.7}.engine-tabs{display:flex;overflow-x:auto;gap:.4rem;padding-bottom:.35rem;-webkit-overflow-scrolling:touch}.engine-tab{flex:1 1 0px;min-width:64px;padding:.5rem .4rem;border-radius:var(--radius-sm);border:1px solid var(--border-hairline);background:var(--bg-surface);color:var(--ink-secondary);font-weight:600;cursor:pointer;transition:all .15s ease;text-align:center;display:flex;flex-direction:column;align-items:center}.engine-tab[aria-selected=true]{border-color:var(--accent);background:var(--accent-tint);color:var(--accent-strong)}.wa-sticky-bar{position:fixed;bottom:0;left:0;right:0;background:var(--bg-surface);border-top:1px solid var(--border-hairline);padding:.75rem 1rem env(safe-area-inset-bottom,.75rem);box-shadow:0 -2px 8px #1c19170f;z-index:999}.wa-sticky-bar__button{display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;max-width:520px;margin:0 auto;background:var(--wa-green);color:#06110e;font-weight:700;font-size:.95rem;text-align:center;padding:.85rem 1rem;border-radius:var(--radius-sm);text-decoration:none;transition:background .15s ease;min-height:48px}.wa-sticky-bar__button:hover,.wa-sticky-bar__button:active{background:var(--wa-green-hover)}.article-body p{font-family:var(--font-body);font-size:var(--text-body);line-height:1.75;color:var(--ink-primary);max-width:65ch;margin-bottom:1.25rem}.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:.15em}.badge{display:inline-flex;align-items:center;gap:.35rem;padding:.2rem .55rem;border-radius:var(--radius-sm);font-size:var(--text-meta);font-weight:600}.badge-emerald{background:var(--accent-tint);color:var(--accent);border:1px solid var(--accent)}.badge-cyan{background:#f0f9ff;color:#0284c7;border:1px solid #BAE6FD}.container{width:100%;max-width:960px;margin:0 auto;padding:0 1.25rem}.article-container{width:100%;max-width:680px;margin:0 auto;padding:0 1rem}@media(max-width:640px){.container{padding:0 1rem}}