:root{--bg-light:#f8f9fa;--panel-bg:#ffffff;--text-main:#111827;--text-muted:#6b7280;--border-color:#e5e7eb;--hover-outline:#9ca3af;--btn-bg:#1f2937;--btn-text:#ffffff;--accent-blue:#0284c7;--accent-green:#10b981;--danger-red:#ef4444;--premium-gradient:linear-gradient(135deg,#f59e0b,#d97706)}*{box-sizing:border-box}body{margin:0;font-family:Roboto,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;background-color:var(--bg-light);color:var(--text-main);height:100vh;overflow:hidden}#loading-overlay{position:fixed;top:0;left:0;width:100%;height:100vh;background-color:#ffffff;z-index:9999;opacity:1;visibility:visible;transition:opacity .5s ease,visibility .5s ease}#loading-overlay.loaded,.toast-notification{opacity:0;visibility:hidden}.toast-notification{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-20px);background:#1f2937;color:#ffffff;padding:10px 20px;border-radius:0;font-size:14px;font-weight:600;box-shadow:0 10px 25px rgba(0,0,0,.15);z-index:10000;transition:transform .3s cubic-bezier(.16,1,.3,1),opacity .3s ease,visibility .3s ease;display:flex;align-items:center;gap:8px}.toast-notification.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}#app-container{width:100%;height:100vh;display:flex;overflow:hidden}.app-inner{display:flex;width:100%;height:100%;min-height:0}.sidebar{width:260px;flex-shrink:0;background:#ffffff;border-right:1px solid var(--border-color);padding:24px 20px 0;box-sizing:border-box;display:flex;flex-direction:column;z-index:100;height:100vh;position:sticky;top:0}.logo-brand{font-size:24px;font-weight:700;color:#000000;margin-bottom:24px;letter-spacing:-.5px}.nav-list{flex-direction:column}.nav-btn,.nav-list{display:flex;width:100%}.nav-btn{align-items:center;gap:12px;padding:12px 16px;margin-bottom:8px;background:transparent;color:var(--text-muted);font-size:14px;font-weight:500;text-align:left;border-radius:0;text-decoration:none;box-sizing:border-box;transition:background-color .15s,color .15s;border:none;cursor:pointer}.nav-btn.active,.nav-btn:hover{background:#f3f4f6;color:var(--text-main)}.btn-logout-nav{margin-top:8px;background:#fef2f2;color:#991b1b;text-align:center;border:none;justify-content:center}.menu-img-container{width:260px;margin-top:auto;margin-left:-20px;margin-right:-20px;display:none;justify-content:center;align-items:flex-end}.menu-img-container img{width:100%;height:auto;image-rendering:pixelated;display:block}.main-content{flex:1;min-height:0;padding:40px;display:flex;gap:40px;overflow-y:auto;box-sizing:border-box}.left-column{flex-grow:1;display:flex;flex-direction:column;max-width:800px}h2{font-size:28px;font-weight:700;letter-spacing:-.5px;margin-bottom:8px}h2,p{margin-top:0}p{color:var(--text-muted);font-size:15px;line-height:22px;margin-bottom:24px}.settings-section{background:transparent;border:none;border-radius:0;padding:0;margin-bottom:24px;box-shadow:none}.form-group{margin-bottom:32px}.section-header{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:700;color:var(--text-main);margin-bottom:16px}.section-header i{color:#3b82f6;font-size:18px}.input-field{width:100%;padding:14px 16px;border-radius:0;border:1px solid var(--border-color);background:var(--bg-light);color:var(--text-main);font-size:15px;transition:all .2s;box-sizing:border-box}.input-field:hover{border-color:#9ca3af}.input-field:focus{outline:none;border-color:#374151;box-shadow:0 0 0 3px rgba(17,24,39,.08);background:#ffffff}.btn-primary{background:var(--accent-blue);color:#ffffff;padding:14px 24px;border-radius:10px;border:none;font-weight:600;font-size:15px;cursor:pointer;display:inline-flex;align-items:center;gap:8px}.btn-primary:hover{background:#0369a1}#btn-save-profile{background:transparent;color:#111827;border:1px solid var(--border-color);width:auto;display:inline-flex;align-items:center;justify-content:flex-start;padding:11px 16px;border-radius:0;font-weight:600;font-size:14px;box-shadow:none;cursor:pointer;box-sizing:border-box}#btn-save-profile:hover{background:transparent;color:#000000;border-color:#9ca3af}#btn-save-profile:active{transform:none}.avatar-preview-container{display:flex;align-items:center;gap:20px;margin-bottom:24px}.current-avatar-wrapper{position:relative;display:inline-block}.current-avatar{width:90px;height:90px;border-radius:50%;-o-object-fit:cover;object-fit:cover;box-shadow:0 4px 10px rgba(0,0,0,.08)}.avatar-picker{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:24px}.avatar-card{position:relative;width:80px;height:80px;border-radius:16px;border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;background:#ffffff;padding:6px;box-sizing:border-box}.avatar-card img{width:100%;height:100%;border-radius:50%;-o-object-fit:cover;object-fit:cover}.settings-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.btn-logout-settings{margin-top:0;width:auto;display:inline-flex;align-items:center;justify-content:center;padding:11px 16px;border:1px solid #fecdd3;border-radius:0;background:#fef2f2;color:#991b1b;font-size:14px;font-weight:600;cursor:pointer;box-shadow:none}.btn-logout-settings:hover{background:#fef2f2;border-color:#fecdd3;color:#991b1b;transform:none}.avatar-card:hover{border-color:var(--hover-outline);box-shadow:none;transform:none}.avatar-card.selected{border-color:var(--hover-outline);background:#ffffff}.check-badge{display:none;position:absolute;top:-8px;right:-8px;background:#2563eb;color:#ffffff;width:24px;height:24px;border-radius:50%;align-items:center;justify-content:center;font-size:12px;border:2px solid #ffffff;box-shadow:0 2px 4px rgba(0,0,0,.1)}.avatar-card.selected .check-badge{display:flex}.premium-lock-widget{background:#fffbeb;border:1px solid #d97706;border-radius:0;padding:16px;display:flex;align-items:center;gap:12px;color:#d97706;font-size:14px;font-weight:500}.upload-box{border:2px dashed var(--border-color);border-radius:0;padding:32px 24px;text-align:center;background:#fafafa;transition:border-color .2s,background-color .2s;cursor:pointer}.upload-box.is-dragover,.upload-box:hover{border-color:#6b7280;background:#f3f4f6}.upload-box-icon{font-size:28px;color:#9ca3af;margin-bottom:12px}.upload-box.is-dragover .upload-box-icon{color:#374151}.upload-box-title{font-size:15px;font-weight:600;color:var(--text-main);margin:0 0 6px}.upload-box-hint{font-size:13px;color:var(--text-muted);margin:0;line-height:1.5}.lang-switch{display:flex;gap:10px}.lang-option{flex:1;width:auto;padding:12px 16px;border-radius:0;border:1px solid var(--border-color);background:#ffffff;color:var(--text-main);font-size:15px;font-weight:700;cursor:pointer;box-shadow:none}.lang-option:hover{transform:none}.lang-option.is-active,.lang-option:hover{border-color:var(--hover-outline);background:#ffffff;color:var(--text-main)}.right-column{width:320px;flex-shrink:0;background:#ffffff;padding:24px;border-radius:8px;border:1px solid var(--border-color);height:-moz-fit-content;height:fit-content;box-shadow:0 1px 3px 0 rgba(0,0,0,.1);position:sticky;top:40px}.right-column h3{margin-top:0;font-size:22px;font-weight:700;letter-spacing:-.5px;margin-bottom:20px}.streak-card{border:1px solid var(--border-color);border-radius:12px;padding:16px;margin-bottom:20px}.streak-header{display:flex;justify-content:space-between;align-items:center}.streak-title{font-size:15px;font-weight:500}.streak-value-container{display:flex;align-items:center;gap:6px;font-size:24px;font-weight:700}.info-card{border:1px solid var(--border-color);border-radius:12px;padding:16px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center}.info-label-group{display:flex;flex-direction:column;gap:4px}.info-title{font-size:14px;font-weight:500}.info-value{font-size:13px;color:var(--text-muted)}.info-value.premium-active{color:#059669;font-weight:600}.buy-btn{background-color:#f3f4f6;color:#0284c7;padding:6px 16px;border-radius:0;text-decoration:none;font-size:13px;font-weight:600;transition:background-color .15s}.buy-btn:hover{background-color:#dbeafe}.prem-link-block{flex-direction:column;align-items:flex-start}.prem-link-block,.prem-link-btn{display:flex;gap:10px;width:100%;box-sizing:border-box}.prem-link-btn{align-items:center;justify-content:center;background:#002664;color:#ffffff;padding:14px;border-radius:6px;text-decoration:none;font-size:15px;font-weight:600;border:1px solid #002664;box-shadow:none}.prem-link-btn:hover{background:#002664;color:#ffffff;border-color:var(--hover-outline,#9ca3af);opacity:1}.prem-link-logos{display:inline-flex;align-items:center;gap:4px}.prem-link-logos img{height:22px;width:auto;-o-object-fit:contain;object-fit:contain;background:none;padding:0;border-radius:0}.prem-free-link{display:inline-flex;font-size:13px;font-weight:600;color:#111827;text-decoration:underline;background:none;border:none;padding:0;cursor:pointer}.prem-free-link:hover{color:#000000}.free-premium-widget{width:100%;box-sizing:border-box;background:var(--premium-gradient);border-radius:12px;padding:18px;margin-bottom:20px;color:#ffffff;position:relative;overflow:hidden;box-shadow:0 4px 12px rgba(217,119,6,.15)}.free-premium-widget .bg-icon{position:absolute;right:-10px;bottom:-15px;font-size:70px;color:#ffffff;opacity:.15;transform:rotate(-15deg);z-index:1}.free-premium-content{position:relative;z-index:2}.free-premium-title{font-size:16px;font-weight:700;margin-bottom:6px;line-height:1.3}.free-premium-subtitle{font-size:13px;opacity:.95;margin-bottom:14px;line-height:1.4}.free-premium-btn{display:inline-block;background-color:#ffffff;color:#d97706;padding:8px 16px;border-radius:8px;text-decoration:none;font-size:13px;font-weight:700;transition:transform .2s,box-shadow .2s}.free-premium-btn:hover{border-color:#111827;box-shadow:none;transform:none}@media (max-width:1024px){body{height:auto;overflow-y:auto}#app-container{height:auto;overflow:visible}.app-inner{flex-direction:column;height:auto}.sidebar{width:100%;height:auto;position:sticky;top:0;border-right:none;border-bottom:1px solid var(--border-color);padding:16px 16px 12px;box-shadow:0 2px 8px rgba(0,0,0,.05)}.sidebar .logo-brand{margin-bottom:12px;font-size:20px}.nav-list{flex-direction:row;gap:18px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch}.nav-list::-webkit-scrollbar{display:none}.nav-btn{width:auto;white-space:nowrap;margin-bottom:0;padding:8px 14px;font-size:13px;flex-shrink:0}.btn-logout-nav{margin-top:0}.menu-img-container{display:none}.main-content{flex-direction:column;padding:24px 20px;gap:24px;overflow-y:visible}.right-column{width:100%;position:static}}@media (max-width:640px){.main-content{padding:16px}.settings-section{padding:0}.avatar-preview-container{flex-direction:column;align-items:flex-start;gap:12px}.avatar-picker{gap:10px}.avatar-card{width:68px;height:68px}.left-column{max-width:100%}}.logo-brand{display:flex;align-items:center;text-decoration:none;color:inherit}.logo-img{height:36px;width:auto;display:block;-o-object-fit:contain;object-fit:contain}.nav-list .nav-btn i{display:none}@media (max-width:1024px){.nav-list{gap:18px}.nav-list .nav-btn{position:relative}.nav-list .nav-btn:not(:last-child):after{content:"|";position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:#9ca3af;font-weight:400;pointer-events:none;line-height:1}}