:root{--bg: #f7f8fb;--panel: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--brand: #2563eb;--brand-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--pill: #e9efff;--ok: #059669;--shadow: 0 6px 18px rgba(16, 24, 40, .08);--shadow-hover: 0 8px 25px rgba(0,0,0,.12);--transition: all .3s ease}.app{background:var(--bg);min-height:100vh;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.container{max-width:1100px;margin:24px auto;padding:0 16px}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--brand-gradient);border-radius:12px;box-shadow:var(--shadow);margin-bottom:2rem;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px;font-weight:700;color:#fff;font-size:1.5rem;letter-spacing:.5px;transition:transform .2s ease}.brand:hover{transform:scale(1.02)}.brand-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#fff;color:var(--brand);font-weight:800;font-size:1.1rem}.nav{display:flex;gap:12px;align-items:center}.nav-link{padding:.75rem 1.25rem;background:#ffffff26;color:#fff;border:2px solid rgba(255,255,255,.2);border-radius:25px;cursor:pointer;font-size:.9rem;font-weight:500;transition:var(--transition);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);text-decoration:none;display:inline-block}.nav-link:hover{background:#ffffff40;border-color:#fff6;transform:translateY(-1px)}.nav-link.active{background:#fff;color:var(--brand);border-color:#fff}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow);margin-bottom:22px;transition:var(--transition)}.panel:hover{box-shadow:var(--shadow-hover)}.panel-title{font-size:22px;font-weight:700;margin-bottom:18px;color:var(--text)}.mentor-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:1rem}@media (max-width: 980px){.mentor-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 560px){.mentor-grid{grid-template-columns:1fr}}.mentor-card{border:1px solid var(--border);border-radius:14px;padding:20px;background:#fff;transition:var(--transition);position:relative;overflow:hidden;cursor:pointer}.mentor-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--brand-gradient);opacity:0;transition:opacity .3s ease}.mentor-card:hover:before{opacity:1}.mentor-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand)}.mentor-top{display:flex;gap:12px;align-items:center;margin-bottom:16px}.avatar{width:44px;height:44px;border-radius:999px;background:#eef2ff;color:#4338ca;display:grid;place-items:center;font-weight:700;border:2px solid var(--border);transition:var(--transition)}.mentor-card:hover .avatar{transform:scale(1.05);border-color:var(--brand)}.mentor-name h3{margin:0 0 6px;font-size:18px;font-weight:600;color:var(--text)}.mentor-meta{margin:12px 0}.role{color:var(--text);margin:0 0 6px;font-weight:500;font-size:.95rem}.mentees{color:var(--muted);margin:0;font-size:.85rem}.pill{background:var(--pill);color:#3758f9;font-size:12px;padding:6px 12px;border-radius:999px;font-weight:600;display:inline-block;margin-bottom:12px}.stars{display:flex;align-items:center;gap:4px;margin-top:8px}.star{opacity:.3;color:#fbbf24;font-size:16px;transition:opacity .2s ease}.star.filled{opacity:1}.rating-num{margin-left:6px;color:var(--muted);font-weight:600;font-size:.9rem}.two-col{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}@media (max-width: 980px){.two-col{grid-template-columns:1fr}}.chat-list{display:grid;gap:12px;margin-top:1rem}.chat-row{display:flex;align-items:center;justify-content:space-between;width:100%;padding:16px 20px;background:#f9fafb;border:1px solid var(--border);border-radius:12px;font-weight:600;cursor:pointer;transition:var(--transition);color:var(--text)}.chat-row:hover{background:#f3f4f6;border-color:var(--brand);transform:translateY(-1px);box-shadow:0 4px 12px #00000014}.chat-row .chevron{font-size:20px;line-height:1;color:var(--muted);transition:transform .2s ease}.chat-row:hover .chevron{transform:translate(3px);color:var(--brand)}.feed-list{display:grid;gap:16px;margin-top:1rem}.feed-row{display:flex;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid #f1f3f4;transition:var(--transition)}.feed-row:last-child{border-bottom:none}.feed-row:hover{background:#f9fafb;border-radius:8px;margin:0 -12px;padding:12px}.feed-avatar{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:1rem;flex-shrink:0;transition:transform .2s ease}.feed-avatar.rk{background:linear-gradient(135deg,#667eea,#764ba2)}.feed-avatar.rs{background:linear-gradient(135deg,#7c4dff,#536dfe)}.feed-avatar.pa{background:linear-gradient(135deg,#536dfe,#3f51b5)}.feed-avatar.as{background:linear-gradient(135deg,#43e97b,#38f9d7)}.feed-row:hover .feed-avatar{transform:scale(1.05)}.feed-meta{display:grid;flex:1}.feed-name{font-weight:600;color:var(--text);margin-bottom:2px;font-size:1rem}.status{color:var(--muted);font-size:14px;font-weight:500}.status.ok{color:var(--ok);font-weight:600}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#1e3c72,#2a5298,#3a7bd5);background-size:300% 300%;animation:gradientShift 12s ease infinite;position:relative;overflow:hidden}.login-container:before{content:"";position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle at center,rgba(255,255,255,.15),transparent 70%);top:-150px;left:-150px;animation:float 8s ease-in-out infinite}.login-container:after{content:"";position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle at center,rgba(59,130,246,.25),transparent 70%);bottom:-200px;right:-200px;animation:float 10s ease-in-out infinite reverse}@keyframes float{0%,to{transform:translateY(0) translate(0)}50%{transform:translateY(-30px) translate(20px)}}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.login-form{background:#fffffff2;padding:2.5rem;border-radius:20px;box-shadow:0 25px 60px #00000040;width:100%;max-width:420px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);position:relative;z-index:2;animation:fadeInUp .8s ease-out}.login-form h2{text-align:center;margin-bottom:2rem;color:#1e3a8a;font-size:1.9rem;font-weight:700;letter-spacing:.5px}.form-group label{color:#334155}.form-group input{border:2px solid #dbeafe;background:#f0f9ff}.form-group input:focus{border-color:#3b82f6;background:#fff;box-shadow:0 0 0 4px #2563eb26}.login-form button{width:100%;padding:14px;background:linear-gradient(135deg,#3a7bd5,#00d2ff);color:#fff;border:none;border-radius:12px;font-size:1rem;cursor:pointer;margin-top:1rem;font-weight:600;transition:var(--transition);box-shadow:0 8px 20px #3b82f659}.login-form button:hover{transform:translateY(-2px);box-shadow:0 12px 28px #2563eb66}.login-extra{margin-top:1rem;text-align:center;font-size:.9rem}.login-extra a{color:#2563eb;font-weight:600;text-decoration:none}.login-extra a:hover{text-decoration:underline}@media (max-width: 768px){.topbar{flex-direction:column;gap:1rem;padding:1rem;height:auto}.nav{flex-wrap:wrap;justify-content:center}.brand{font-size:1.3rem}.container{padding:0 12px;margin:16px auto}.panel{padding:18px}.mentor-card{padding:16px}.chat-row,.feed-row{padding:12px 16px}}@media (max-width: 480px){.panel-title{font-size:1.25rem}.mentor-top{flex-direction:column;text-align:center;gap:8px}.login-form{padding:2rem;margin:1rem}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.mentor-card,.panel{animation:fadeInUp .5s ease-out}.nav-link:focus,.chat-row:focus,button:focus,input:focus{outline:2px solid var(--brand);outline-offset:2px}.mentor-card.loading{background:linear-gradient(90deg,#f0f0f0 25%,transparent 37%,#f0f0f0 63%);background-size:400% 100%;animation:shimmer 1.5s ease-in-out infinite}@keyframes shimmer{0%{background-position:100% 50%}to{background-position:-100% 50%}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Arial,"Apple Color Emoji","Segoe UI Emoji";background:#f7f8fb}