:root{--primary-gradient:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--secondary-gradient:linear-gradient(135deg,#f093fb 0%,#f5576c 100%);--dark-bg:#0f0f23;--card-bg:#ffffff0d;--text-primary:#fff;--text-secondary:#b8b8d1;--accent:#667eea;--success:#4ade80;--error:#f87171;--border-radius:12px;--shadow:0 8px 32px #0000004d;--shadow-hover:0 12px 40px #0006}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--dark-bg);min-height:100vh;color:var(--text-primary);background-image:radial-gradient(circle at 20% 80%,#7877c64d 0%,#0000 50%),radial-gradient(circle at 80% 20%,#ff77c64d 0%,#0000 50%),radial-gradient(circle at 40% 40%,#78dbff33 0%,#0000 50%);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}.app{flex-direction:column;min-height:100vh;display:flex}.loading-container{flex-direction:column;justify-content:center;align-items:center;gap:1rem;min-height:100vh;display:flex}.loading-spinner{border:3px solid #ffffff1a;border-top:3px solid var(--accent);border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.auth-container{justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex}.auth-card{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);width:100%;max-width:400px;box-shadow:var(--shadow);border:1px solid #ffffff1a;padding:2rem;animation:.6s ease-out slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.auth-card h1{text-align:center;background:var(--primary-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:2rem;font-size:2rem;font-weight:700}.auth-tabs{background:#ffffff0d;border-radius:8px;margin-bottom:2rem;padding:4px;display:flex}.tab{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;flex:1;padding:.75rem 1rem;font-weight:500;transition:all .3s}.tab.active{background:var(--primary-gradient);color:#fff;box-shadow:0 2px 8px #667eea4d}.tab:hover:not(.active){color:var(--text-primary);background:#ffffff0d}.form-group{margin-bottom:1.5rem}.form-group label{color:var(--text-primary);margin-bottom:.5rem;font-weight:500;display:block}.form-group input,.form-group textarea{width:100%;color:var(--text-primary);background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;padding:.75rem 1rem;font-size:1rem;transition:all .3s}.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #667eea1a}.form-group textarea{resize:vertical;min-height:100px}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;text-decoration:none;transition:all .3s;display:inline-flex}.btn-primary{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 15px #667eea4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.btn-secondary{color:var(--text-primary);background:#ffffff1a;border:1px solid #fff3}.btn-secondary:hover{background:#ffffff26;transform:translateY(-1px)}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover{background:#ef4444;transform:translateY(-1px)}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.navbar{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100;border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;position:sticky;top:0}.navbar-brand{background:var(--primary-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.5rem;font-weight:700;text-decoration:none}.navbar-nav{align-items:center;gap:1rem;display:flex}.nav-link{color:var(--text-secondary);border-radius:6px;padding:.5rem 1rem;font-weight:500;text-decoration:none;transition:all .3s}.nav-link:hover,.nav-link.active{color:var(--text-primary);background:#ffffff1a}.user-info{align-items:center;gap:1rem;display:flex}.user-avatar{background:var(--primary-gradient);border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:.875rem;font-weight:600;display:flex}.main-content{flex:1;width:100%;max-width:800px;margin:0 auto;padding:2rem}.card{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);box-shadow:var(--shadow);border:1px solid #ffffff1a;margin-bottom:1.5rem;padding:1.5rem;transition:all .3s;animation:.6s ease-out fadeInUp}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.card-header{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.card-avatar{background:var(--primary-gradient);border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.125rem;font-weight:600;display:flex}.card-user-info h3{margin-bottom:.25rem;font-size:1rem;font-weight:600}.card-user-info p{color:var(--text-secondary);font-size:.875rem}.card-content{margin-bottom:1rem}.card-content p{margin-bottom:1rem;line-height:1.6}.card-image{border-radius:8px;width:100%;margin-bottom:1rem}.card-actions{border-top:1px solid #ffffff1a;align-items:center;gap:1rem;padding-top:1rem;display:flex}.action-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;align-items:center;gap:.5rem;padding:.5rem;font-size:.875rem;transition:all .3s;display:flex}.action-btn:hover{color:var(--accent);background:#667eea1a}.action-btn.liked{color:var(--error)}.action-btn.liked:hover{color:#ef4444;background:#f871711a}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#000c;justify-content:center;align-items:center;padding:2rem;display:flex;position:fixed;inset:0}.modal{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);width:100%;max-width:500px;max-height:90vh;box-shadow:var(--shadow);border:1px solid #ffffff1a;padding:2rem;animation:.3s ease-out modalSlideIn;overflow-y:auto}@keyframes modalSlideIn{0%{opacity:0;transform:scale(.9)translateY(-20px)}to{opacity:1;transform:scale(1)translateY(0)}}.modal-header{justify-content:space-between;align-items:center;margin-bottom:1.5rem;display:flex}.modal-title{font-size:1.25rem;font-weight:600}.close-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:.25rem;font-size:1.5rem;transition:all .3s}.close-btn:hover{color:var(--text-primary);background:#ffffff1a}.comments-section{border-top:1px solid #ffffff1a;margin-top:1rem;padding-top:1rem}.comment{background:#ffffff05;border-radius:8px;gap:.75rem;margin-bottom:1rem;padding:.75rem;display:flex}.comment-avatar{background:var(--secondary-gradient);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.75rem;font-weight:600;display:flex}.comment-content{flex:1}.comment-header{align-items:center;gap:.5rem;margin-bottom:.25rem;display:flex}.comment-author{font-size:.875rem;font-weight:600}.comment-time{color:var(--text-secondary);font-size:.75rem}.comment-text{font-size:.875rem;line-height:1.5}@media (max-width:768px){.main-content,.navbar{padding:1rem}.navbar-nav{gap:.5rem}.card{padding:1rem}.modal{margin:1rem;padding:1.5rem}}.feed-header{justify-content:space-between;align-items:center;margin-bottom:2rem;display:flex}.feed-header h2{font-size:1.5rem;font-weight:700}.empty-state{text-align:center;background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);box-shadow:var(--shadow);border:1px solid #ffffff1a;padding:3rem 2rem}.empty-state h3,.empty-state h4{color:var(--text-primary);margin-bottom:1rem}.empty-state p{color:var(--text-secondary);margin-bottom:1.5rem}.post-actions{gap:.5rem;margin-left:auto;display:flex}.edit-form{margin-bottom:1rem}.edit-actions{gap:.5rem;margin-top:1rem;display:flex}.profile-header{margin-bottom:2rem}.profile-card{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);box-shadow:var(--shadow);border:1px solid #ffffff1a;align-items:flex-start;gap:2rem;padding:2rem;display:flex}.profile-avatar-section{flex-direction:column;align-items:center;gap:1rem;display:flex}.profile-avatar{background:var(--primary-gradient);width:120px;height:120px;box-shadow:var(--shadow);border-radius:50%;justify-content:center;align-items:center;font-size:2rem;font-weight:600;display:flex}.profile-info{flex:1}.profile-info h2{margin-bottom:.5rem;font-size:2rem;font-weight:700}.profile-email{color:var(--text-secondary);margin-bottom:.5rem}.profile-join-date{color:var(--text-secondary);margin-bottom:1.5rem;font-size:.875rem}.profile-bio{margin-bottom:1rem}.profile-bio p{margin-bottom:1rem;line-height:1.6}.profile-edit-form{margin-top:1rem}.profile-edit-actions{gap:1rem;margin-top:1rem;display:flex}.profile-posts h3{margin-bottom:1.5rem;font-size:1.25rem;font-weight:600}.modal-actions{justify-content:flex-end;gap:1rem;margin-top:1.5rem;display:flex}.comment-form{border-top:1px solid #ffffff1a;margin-top:1.5rem;padding-top:1.5rem}.comment-actions{justify-content:flex-end;gap:1rem;margin-top:1rem;display:flex}.comments-container{max-height:400px;margin-bottom:1rem;overflow-y:auto}.comments-list{flex-direction:column;gap:1rem;display:flex}.image-preview{margin-top:.5rem}.avatar-upload{flex-direction:column;align-items:center;gap:.5rem;display:flex}.error-message{border:1px solid var(--error);color:var(--error);background:#f871711a;border-radius:8px;margin-bottom:1rem;padding:.75rem 1rem;font-size:.875rem}.text-center{text-align:center}.text-error{color:var(--error)}.text-success{color:var(--success)}.text-secondary{color:var(--text-secondary)}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}