*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #fafafa;--bg-white: #ffffff;--border-color: #dbdbdb;--text-primary: #262626;--text-secondary: #8e8e8e;--text-link: #0095f6;--shadow-light: 0 1px 3px rgba(0, 0, 0, .08);--shadow-medium: 0 2px 8px rgba(0, 0, 0, .1);--max-width: 600px;--header-height: 60px}html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-top:var(--header-height);padding-bottom:20px}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background-color:var(--bg-white);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;z-index:100}.header-content{width:100%;max-width:var(--max-width);padding:0 16px;display:flex;align-items:center;justify-content:space-between}.header-logo{font-family:Segoe Script,Brush Script MT,cursive;font-size:1.75rem;font-weight:500;color:var(--text-primary);text-decoration:none}.header-nav{display:flex;gap:20px}.header-nav a{color:var(--text-primary);text-decoration:none;font-size:.9rem;font-weight:500;padding:8px 12px;border-radius:4px;transition:background-color .2s}.header-nav a:hover{background-color:var(--bg-primary)}.header-nav a.active{color:var(--text-link)}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 16px}.feed{display:flex;flex-direction:column;gap:24px;padding:20px 0}.post-card{background-color:var(--bg-white);border:1px solid var(--border-color);border-radius:8px;overflow:hidden;box-shadow:var(--shadow-light)}.post-header{display:flex;align-items:center;padding:14px 16px;gap:12px}.post-avatar{width:32px;height:32px;border-radius:50%;background-color:var(--border-color);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:600;color:#fff}.post-avatar.avatar-matt{background:linear-gradient(135deg,#667eea,#764ba2)}.post-avatar.avatar-tammy{background:linear-gradient(135deg,#f093fb,#f5576c)}.post-username{font-weight:600;font-size:.875rem;color:var(--text-primary);text-decoration:none}.post-username:hover{text-decoration:underline}.post-media-container{position:relative;width:100%;background-color:#000}.post-image-container{width:100%;position:relative;display:block}.post-image{width:100%;display:block;object-fit:contain;max-height:600px}.media-nav-btn{position:absolute;top:50%;transform:translateY(-50%);background:#ffffffe6;border:none;border-radius:50%;width:32px;height:32px;font-size:1.25rem;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:10;transition:opacity .2s;color:var(--text-primary)}.media-nav-btn:hover{background:#fff}.media-nav-prev{left:8px}.media-nav-next{right:8px}.media-dots{position:absolute;bottom:16px;left:50%;transform:translate(-50%);display:flex;gap:4px;z-index:10}.media-dot{width:6px;height:6px;border-radius:50%;background:#ffffff80;cursor:pointer;transition:background .2s}.media-dot.active{background:#fff}.media-dot:hover{background:#fffc}.post-content{padding:16px}.post-actions{display:flex;gap:16px;margin-bottom:12px}.post-action-btn{background:none;border:none;cursor:pointer;padding:4px;font-size:1.5rem;color:var(--text-primary);transition:opacity .2s}.post-action-btn:hover{opacity:.6}.post-action-btn.liked{animation:like-pop .3s ease}@keyframes like-pop{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.post-likes{font-weight:600;font-size:.875rem;margin-bottom:8px}.post-caption{font-size:.875rem;margin-bottom:8px}.post-caption strong{font-weight:600;margin-right:6px}.post-date{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.02em}.post-view-comments{color:var(--text-secondary);font-size:.875rem;cursor:pointer;margin-bottom:8px}.post-view-comments:hover{text-decoration:underline}.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:20px 0}.grid-item{position:relative;aspect-ratio:1;overflow:hidden;cursor:pointer}.grid-item img,.grid-item video{width:100%;height:100%;object-fit:cover;transition:transform .2s}.grid-item:hover img,.grid-item:hover video{transform:scale(1.05)}.grid-item-multi{position:absolute;top:8px;right:8px;font-size:1rem;z-index:5}.grid-item-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background-color:#0000004d;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s}.grid-item:hover .grid-item-overlay{opacity:1}.grid-item-stats{color:#fff;font-weight:600;font-size:1rem}.single-post{padding:20px 0}.single-post .post-card{max-width:var(--max-width);margin:0 auto}.comments-section{padding:16px;border-top:1px solid var(--border-color)}.comments-list{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}.comment{font-size:.875rem}.comment-username{font-weight:600;margin-right:6px}.comment-date{font-size:.75rem;color:var(--text-secondary);margin-top:4px}.comment-input-container{display:flex;gap:12px;border-top:1px solid var(--border-color);padding-top:16px}.comment-input{flex:1;border:none;outline:none;font-size:.875rem;font-family:inherit;resize:none}.comment-input::placeholder{color:var(--text-secondary)}.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--text-secondary)}.loading-spinner{width:24px;height:24px;border:2px solid var(--border-color);border-top-color:var(--text-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.empty-state h2{font-size:1.25rem;margin-bottom:8px;color:var(--text-primary)}@media (max-width: 640px){.post-grid{gap:2px}.header-content{padding:0 12px}.post-card{border-radius:0;border-left:none;border-right:none}}@media (min-width: 641px){.container{padding:0}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}