.auth-light-mode{--auth-bg:#f0f2f5;--auth-surface:#fff;--auth-border:#d9dee3;--auth-primary-text:#1c1e21;--auth-secondary-text:#606770;--auth-accent:#0062cc;--auth-logo-bg:#f0f2f5}.auth-header{max-width:940px;margin:4em auto;font-family:var(--font-primary);position:relative;background-color:var(--auth-surface);border:1px solid var(--auth-border);border-radius:var(--auth-radius);box-shadow:0 10px 25px rgba(0,0,0,.1),0 20px 60px rgba(0,0,0,.2);transition:background-color var(--transition-speed) ease,border-color var(--transition-speed) ease;opacity:0;transform:translateY(20px);animation:auth-fade-in 1s cubic-bezier(.16,1,.3,1) forwards}.auth-theme-toggle{position:absolute;top:1.25rem;right:1.25rem;width:40px;height:40px;background-color:transparent;border:1px solid var(--auth-border);border-radius:50%;cursor:pointer;display:grid;place-items:center;overflow:hidden;transition:all var(--transition-speed) ease}.auth-theme-toggle:hover{border-color:var(--auth-accent)}.auth-theme-toggle .icon-container{position:relative;width:20px;height:40px}.auth-theme-toggle svg{position:absolute;left:0;width:20px;height:20px;color:var(--auth-secondary-text);transition:transform .4s cubic-bezier(.2,.8,.2,1)}.auth-theme-toggle .sun-icon{top:10px;transform:translateY(0)}.auth-theme-toggle .moon-icon{top:-30px;transform:translateY(0)}.auth-light-mode .sun-icon{transform:translateY(40px)}.auth-light-mode .moon-icon{transform:translateY(40px)}.auth-header *{transition:color var(--transition-speed) ease,background-color var(--transition-speed) ease,border-color var(--transition-speed) ease}.auth-identity{display:grid;grid-template-columns:auto 1fr;gap:clamp(1rem,4vw,2rem);padding:clamp(1.5rem,4vw,2.5rem);align-items:center}.auth-avatar-container{width:clamp(80px,15vw,110px);height:clamp(80px,15vw,110px);flex-shrink:0;position:relative}.auth-avatar{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid var(--auth-border)}.auth-logo{position:absolute;width:clamp(30px,5vw,40px);height:clamp(30px,5vw,40px);right:-8px;bottom:-8px;border-radius:50%;background-color:var(--auth-logo-bg);padding:5px;border:2px solid var(--auth-border);box-shadow:0 4px 10px rgba(0,0,0,.15)}.auth-details{display:flex;flex-direction:column;gap:.25rem}.auth-title{font-size:.9rem;font-weight:500;color:var(--auth-secondary-text)}.auth-name{font-size:clamp(1.75rem,5vw,2.75rem);font-weight:700;letter-spacing:-1px;color:var(--auth-primary-text);line-height:1.1}.auth-bio{margin-top:.5rem;font-size:clamp(1rem,2vw,1.05rem);color:var(--auth-secondary-text);line-height:1.6;max-width:60ch}.auth-credibility{padding:1.5rem clamp(1.5rem,4vw,2.5rem);border-top:1px solid var(--auth-border);background-color:rgba(0,0,0,.02);display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.auth-light-mode .auth-credibility{background-color:rgba(0,0,0,.03)}.auth-signal{display:flex;align-items:flex-start;gap:1rem}.auth-signal-icon{flex-shrink:0;width:24px;height:24px;color:var(--auth-accent);margin-top:2px}.auth-signal-text h3{font-size:1rem;font-weight:600;color:var(--auth-primary-text);margin:0 0 .25em}.auth-signal-text p{font-size:.9rem;color:var(--auth-secondary-text);margin:0;line-height:1.5}.auth-footer{padding:1rem clamp(1.5rem,4vw,2.5rem);border-top:1px solid var(--auth-border);display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;font-family:var(--font-monospace);font-size:.85rem;color:var(--auth-secondary-text)}@media (max-width:700px){.auth-theme-toggle{top:.75rem;right:.75rem}.auth-identity{grid-template-columns:1fr;text-align:center;justify-items:center}.auth-footer{flex-direction:column;align-items:center;text-align:center}}