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var(--accent-light)}input::placeholder,textarea::placeholder{color:var(--text-muted)}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:ecoSpin .8s linear infinite}@keyframes ecoSpin{to{transform:rotate(360deg)}}.chip{display:inline-flex;align-items:center;padding:7px 16px;border-radius:50px;font-size:13px;font-weight:600;cursor:pointer;border:1px solid var(--border);background:transparent;color:var(--text-secondary);transition:all .18s;white-space:nowrap;font-family:var(--font-body)}.chip.active{background:var(--accent);color:#fff;border-color:var(--accent)}.chip:hover:not(.active){border-color:var(--border-strong);color:var(--text-primary);background:var(--bg-hover)}.eco-divider{height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent);margin:24px 0}.eco-card-aiv{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius);background:#1e3c7212;border:1px solid rgba(30,60,114,.18);text-decoration:none;cursor:pointer;transition:transform .18s,box-shadow .18s}.eco-card-aiv:hover{transform:translateY(-1px);box-shadow:0 6px 20px #1e3c7226}.eco-card-studynest{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius);background:#00d2ff0f;border:1px solid rgba(0,210,255,.18);text-decoration:none;cursor:pointer;transition:transform .18s,box-shadow .18s}.eco-card-studynest:hover{transform:translateY(-1px);box-shadow:0 6px 20px #00d2ff1f}.eco-card-buddy{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius);background:#ff6b3512;border:1px solid rgba(255,107,53,.18);text-decoration:none;cursor:pointer;transition:transform .18s,box-shadow .18s}.eco-card-buddy:hover{transform:translateY(-1px);box-shadow:0 6px 20px #ff6b351f}.eco-avatar-aiv{width:36px;height:36px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,#1e3c72,#2a5298);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:15px;color:#fff;font-family:var(--font-brand)}.eco-avatar-studynest{width:36px;height:36px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,#00d2ff,#0080ff);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:15px;color:#fff;font-family:var(--font-brand)}.eco-avatar-buddy{width:36px;height:36px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,#ff6b35,#ffd93d);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:15px;color:#0d0d0f;font-family:var(--font-brand)}.eco-card-name{font-size:13px;font-weight:700;color:var(--text-primary);line-height:1.2}.eco-card-sub{font-size:11px;color:var(--text-muted);margin-top:2px}.stat-pill{background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;text-align:center}.stat-pill-value{font-size:16px;font-weight:800;line-height:1}.stat-pill-label{font-size:9px;color:var(--text-muted);margin-top:3px;letter-spacing:.06em;text-transform:uppercase}.streak-dot{width:30px;height:30px;border-radius:7px;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);background:var(--bg-hover);color:var(--text-muted);transition:all .2s}.streak-dot.active{background:linear-gradient(135deg,#ff6b35,#f39c12);color:#fff;border-color:#f39c12}.progress-bar-wrap{height:8px;background:var(--bg-hover);border-radius:4px;overflow:hidden}.progress-bar-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .6s ease}.progress-bar-fill.complete{background:linear-gradient(90deg,#2ecc71,#27ae60)}.progress-bar-fill.daily{background:linear-gradient(90deg,#f39c12,#e67e22)}.tier-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700;border:1px solid}.tier-starter{background:#3498db1a;color:#3498db;border-color:#3498db4d}.tier-bronze{background:#e67e221f;color:#e67e22;border-color:#e67e224d}.tier-silver{background:#00d2ff1a;color:#00d2ff;border-color:#00d2ff4d}.tier-gold{background:#f39c121f;color:#f39c12;border-color:#f39c124d}.quiz-option{padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all .2s;background:var(--bg-card);color:var(--text-primary);font-size:14px;text-align:left;width:100%;margin-bottom:8px;font-family:var(--font-body)}.quiz-option:hover,.quiz-option.selected{border-color:var(--accent);background:var(--accent-light)}.quiz-option.correct{border-color:#28a745;background:#2ecc711f;color:#27ae60}.quiz-option.wrong{border-color:#dc3545;background:#e74c3c1a;color:#e74c3c}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px;animation:ecoOverlay .2s ease}.modal-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:36px 32px;width:100%;max-width:480px;position:relative;box-shadow:var(--shadow-lg);animation:ecoFadeIn .2s ease}.modal-close{position:absolute;top:16px;right:18px;background:none;border:none;color:var(--text-muted);font-size:22px;cursor:pointer;border-radius:6px;padding:4px 8px}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.eco-footer{background:linear-gradient(135deg,#0a0a2e,#1e3c72);color:#ccc;padding:28px 24px 18px;margin-top:auto}.eco-footer h3{color:var(--highlight);margin-bottom:14px;font-size:16px}.eco-footer a{color:var(--highlight);text-decoration:none}.eco-footer a:hover{text-decoration:underline}.eco-footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding-top:14px;font-size:12px;color:#888;margin-top:16px}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.slider-container{position:relative;width:100%;overflow:hidden;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);background:var(--bg-card)}.slider{position:relative;width:100%}.slide{display:none;position:relative;width:100%}.slide.active{display:block;animation:ecoSlideIn .5s ease}@keyframes ecoSlideIn{0%{opacity:0;transform:scale(1.02)}to{opacity:1;transform:scale(1)}}.slide img{width:100%;height:300px;object-fit:cover;display:block}.slide-caption{position:absolute;bottom:0;left:0;right:0;padding:30px 20px 16px;background:linear-gradient(transparent,#000000a6);color:#fff;font-size:15px;font-weight:700}.slider-nav-btn{position:absolute;top:50%;transform:translateY(-50%);background:#fff3;border:none;color:#fff;font-size:18px;width:38px;height:38px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:background .2s;padding:0}.slider-nav-btn:hover{background:#fff6}.slider-nav-btn.prev{left:12px}.slider-nav-btn.next{right:12px}.slider-dots{position:absolute;bottom:12px;left:50%;transform:translate(-50%);display:flex;gap:6px}.dot{width:8px;height:8px;border-radius:50%;background:#ffffff80;cursor:pointer;transition:all .2s}.dot.active{background:#fff;width:20px;border-radius:4px}.chatbot-toggle{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;font-size:24px;cursor:pointer;box-shadow:0 4px 20px var(--accent-glow);z-index:500;display:flex;align-items:center;justify-content:center;transition:all .3s}.chatbot-toggle:hover{transform:scale(1.1)}.chatbot-window{position:fixed;bottom:90px;right:24px;width:340px;max-height:480px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);z-index:500;display:flex;flex-direction:column;overflow:hidden;animation:ecoSlideUp .3s ease}@keyframes ecoSlideUp{0%{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.chatbot-header{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;font-weight:700;font-size:14px}.chatbot-body{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin}.chatbot-msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:13px;line-height:1.5}.chatbot-msg.bot{background:var(--bg-hover);color:var(--text-primary);border-bottom-left-radius:4px;align-self:flex-start}.chatbot-msg.user{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.chatbot-input-row{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--border);background:var(--bg-card)}.chatbot-input-row input{flex:1;padding:9px 12px;border-radius:20px;border:1.5px solid var(--border);background:var(--bg-input);color:var(--text-primary);font-size:13px;width:auto;margin-bottom:0}.chatbot-input-row button{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;font-size:16px;display:flex;align-items:center;justify-content:center;padding:0;flex-shrink:0}.auth-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px 36px;max-width:480px;margin:40px auto;text-align:center;box-shadow:var(--shadow-md)}.auth-box h2{color:var(--accent);font-size:22px;margin-bottom:10px;font-family:var(--font-display)}.auth-box p{color:var(--text-muted);margin-bottom:24px;font-size:14px}[data-theme=dark] .left-sidebar a,[data-theme=dark] .left-sidebar button{color:var(--text-primary)!important}[data-theme=dark] .left-sidebar nav a:not([style*=linear-gradient]),[data-theme=dark] .left-sidebar nav button:not([style*=linear-gradient]){color:#c8d8f0!important}@keyframes ecoFadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes ecoSlideRight{0%{opacity:0;transform:translate(-12px)}to{opacity:1;transform:translate(0)}}@keyframes ecoPulseDot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(.85)}}.fade-up{animation:ecoFadeUp .5s ease both}.fade-up-1{animation-delay:.1s}.fade-up-2{animation-delay:.2s}.fade-up-3{animation-delay:.3s}@media (max-width: 1200px){:root{--right-width: 190px}}@media (max-width: 960px){.right-sidebar{display:none!important}.page-content{padding:18px}}@media (max-width: 768px){:root{--right-width: 0}.app-shell{display:block}.left-sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;transform:translate(-100%);transition:transform .28s cubic-bezier(.4,0,.2,1);z-index:300;box-shadow:4px 0 30px #0003}.left-sidebar.open{transform:translate(0)}.sidebar-overlay{display:block}.sidebar-close{display:block!important}.hamburger{display:flex!important}.page-content{padding:12px}.topbar{gap:8px;padding:0 10px}.topbar-right{gap:6px}.theme-toggle{width:32px;height:32px;font-size:14px}.sn-nav-inner{padding:0 16px}.chatbot-window{width:calc(100vw - 32px);right:16px}}@media (max-width: 480px){.left-sidebar{width:260px}.page-content{padding:10px}.auth-box{padding:24px 18px;margin:16px auto}.topbar{gap:6px;padding:0 8px}.topbar-right{gap:4px}.theme-toggle{width:30px;height:30px;font-size:13px}.modal-box{padding:24px 20px}}