:root{color-scheme:light;--bg-primary: #ffffff;--bg-secondary: #ffffff;--bg-tertiary: #f5f6f8;--bg-card: #ffffff;--text-primary: #1c1c1c;--text-secondary: #5c5f66;--text-muted: #9a9ca3;--text-color: #1c1c1c;--accent-primary: #2563eb;--accent-secondary: #3b82f6;--primary: #2563eb;--primary-color: #2563eb;--accent-color: #2563eb;--accent-gradient: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);--accent-soft: rgba(37, 99, 235, .09);--nav-active-bg: #f2f3f5;--nav-active-color: #1c1c1c;--hover-bg: #f7f8fa;--success: #1a9c62;--success-color: #1a9c62;--warning: #c98a1a;--error: #dc2626;--error-color: #dc2626;--danger-color: #dc2626;--border-color: #d8d9dd;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);--shadow-md: 0 4px 12px rgba(16, 24, 40, .07);--shadow-lg: 0 12px 28px rgba(16, 24, 40, .1);--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px}[data-theme=dark]{color-scheme:dark;--bg-primary: #1c1c1c;--bg-secondary: #1c1c1c;--bg-tertiary: #2a2b2d;--bg-card: #202021;--text-primary: #f4f4f5;--text-secondary: #a1a1aa;--text-muted: #6b6c70;--text-color: #f4f4f5;--accent-primary: #3b82f6;--accent-secondary: #60a5fa;--primary: #3b82f6;--primary-color: #3b82f6;--accent-color: #3b82f6;--accent-gradient: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);--accent-soft: rgba(59, 130, 246, .18);--nav-active-bg: rgba(255, 255, 255, .07);--nav-active-color: #f4f4f5;--hover-bg: rgba(255, 255, 255, .04);--success: #34d17e;--success-color: #34d17e;--warning: #e0a53a;--error: #f16a6a;--error-color: #f16a6a;--danger-color: #f16a6a;--border-color: rgba(255, 255, 255, .08);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:14px;line-height:1.5;letter-spacing:-.006em;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .2s ease,color .2s ease}#root{min-height:100vh}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:1000;transition:transform .3s cubic-bezier(.4,0,.2,1)}.sidebar-header{padding:24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.sidebar-close-btn{display:none;background:none;border:none;color:var(--text-secondary);font-size:2rem;cursor:pointer;line-height:1;padding:8px}.sidebar-logo{display:flex;align-items:center;gap:10px;font-size:.95rem;font-weight:600;color:var(--text-primary)}.sidebar-logo-icon{width:30px;height:30px;background:var(--accent-gradient);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.sidebar-nav{flex:1;padding:16px;overflow-y:auto}.nav-section{margin-bottom:18px}.nav-section-title{font-size:.72rem;font-weight:500;letter-spacing:.01em;color:var(--text-muted);padding:0 12px;margin-bottom:6px}.nav-link{display:flex;align-items:center;gap:10px;padding:8px 12px;margin-bottom:1px;border-radius:var(--radius-md);text-decoration:none;color:var(--text-secondary);transition:background .12s ease,color .12s ease;font-weight:500;font-size:.875rem}.nav-link:hover{background:var(--hover-bg);color:var(--text-primary)}.nav-link.active{background:var(--nav-active-bg);color:var(--nav-active-color);font-weight:500}.nav-link-icon{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;color:var(--text-muted);flex-shrink:0}.nav-link:hover .nav-link-icon,.nav-link.active .nav-link-icon{color:var(--accent-primary)}.nav-link-badge{margin-left:auto;background:var(--error);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:10px;font-weight:600}.main-content{flex:1;margin-left:260px;min-height:100vh;background:var(--bg-primary)}.page-header{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:20px 32px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:50}.page-title{font-size:1.15rem;font-weight:600;letter-spacing:-.01em}.page-subtitle{font-size:.8125rem;color:var(--text-secondary);margin-top:2px}.page-content{padding:32px}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);font-size:1.15rem;cursor:pointer;transition:all .15s ease}.theme-toggle:hover{color:var(--accent-primary);border-color:var(--accent-primary)}.card{background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-color);overflow:hidden;transition:all .2s ease}.card.active{border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-soft)}.card-header{padding:20px 24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.card-title{font-size:1.1rem;font-weight:600}.card-body{padding:24px}.icon-tile{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent-primary);overflow:hidden;flex-shrink:0}.icon-tile img{width:100%;height:100%;object-fit:cover}.level-card{transition:border-color .15s ease,box-shadow .15s ease,transform .15s ease}.level-card .card-body{padding:20px}.level-card:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.level-card.is-selected{border-color:var(--accent-primary);box-shadow:0 0 0 1px var(--accent-primary)}.level-card.is-premium{border-color:#d98a1a73}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-bottom:32px}.stat-card{background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-color);padding:24px;transition:all .2s ease}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent-primary)}.stat-icon{width:42px;height:42px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}.stat-icon.users{background:var(--accent-soft);color:var(--accent-primary)}.stat-icon.words{background:#22c55e24;color:var(--success)}.stat-icon.categories{background:#d98a1a24;color:var(--warning)}.stat-icon.feedback{background:#dc262621;color:var(--error)}.stat-value{font-size:1.75rem;font-weight:600;letter-spacing:-.02em;margin-bottom:2px}.stat-label{color:var(--text-secondary);font-size:.8125rem}.stat-change{display:flex;align-items:center;gap:4px;margin-top:8px;font-size:.8125rem;min-height:1.2em}.stat-change.positive{color:var(--success)}.stat-change.negative{color:var(--error)}.table-container{overflow-x:auto;-webkit-overflow-scrolling:touch}.card>table{display:block;overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border-color)}td{font-size:.875rem}th{font-weight:500;color:var(--text-muted);font-size:.8125rem;letter-spacing:0}tr:hover td{background:var(--hover-bg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius-md);font-weight:600;font-size:.875rem;cursor:pointer;transition:all .15s ease;border:none;text-decoration:none}.btn-primary{background:var(--accent-primary);color:#fff}.btn-primary:hover{filter:brightness(1.05);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.btn-danger{background:var(--error);color:#fff}.btn-premium{background:var(--warning);color:#fff}.btn-premium:hover{filter:brightness(1.05)}.btn-sm{padding:6px 12px;font-size:.8rem}.btn-icon{padding:8px;width:36px;height:36px}.form-group{margin-bottom:20px}.form-label{display:block;font-weight:500;margin-bottom:8px;color:var(--text-secondary)}.form-input,.form-textarea,.form-select{width:100%;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:1rem;transition:all .15s ease}.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-soft)}.form-textarea{min-height:120px;resize:vertical}.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase}.badge-pending{background:#d9770629;color:var(--warning)}.badge-resolved{background:#16a34a29;color:var(--success)}.badge-rejected{background:#dc262629;color:var(--error)}.badge-review{background:var(--accent-soft);color:var(--accent-primary)}.badge-premium{gap:4px;background:#d98a1a26;color:var(--warning)}.search-box{position:relative;max-width:400px}.search-input{width:100%;padding:12px 16px 12px 44px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:.875rem}.search-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-soft)}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-muted)}.modal-overlay{position:fixed;inset:0;background:#0f172a80;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.modal{background:var(--bg-secondary);border-radius:var(--radius-xl);border:1px solid var(--border-color);width:90%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .3s ease}.modal-header{padding:24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:1.25rem;font-weight:600}.modal-close{background:none;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer;padding:4px;line-height:1}.modal-body{padding:24px}.modal-footer{padding:16px 24px;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:12px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);background-image:radial-gradient(circle at 20% 80%,rgba(37,99,235,.12) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(59,130,246,.12) 0%,transparent 50%)}.login-card{background:var(--bg-secondary);border-radius:var(--radius-xl);border:1px solid var(--border-color);padding:48px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.login-logo{text-align:center;margin-bottom:32px}.login-logo h1{font-size:2rem;color:var(--accent-primary)}.login-logo p{color:var(--text-muted);margin-top:8px}.mobile-header{display:none;height:64px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:0 16px;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:500}.hamburger-menu{background:none;border:none;color:var(--text-primary);font-size:1.5rem;cursor:pointer;padding:8px}.sidebar-overlay{position:fixed;inset:0;background:#0f172a80;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:900;animation:fadeIn .2s ease}@media(max-width:768px){.app-layout{flex-direction:column}.mobile-header{display:flex}.sidebar{transform:translate(-100%);width:280px;box-shadow:var(--shadow-lg)}.sidebar.open{transform:translate(0)}.sidebar-close-btn{display:block}.main-content{margin-left:0}.page-header{padding:16px 20px;flex-direction:column;align-items:flex-start;gap:12px}.page-header .btn{width:100%}.page-content{padding:16px}.stats-grid{grid-template-columns:1fr;gap:16px}.modal{width:95%;max-height:85vh}.login-card{padding:32px 24px;margin:16px}.page-content>div[style*="display: flex"],.page-content>div.filters-container{flex-direction:column!important;gap:12px!important;align-items:stretch!important}.search-box,.form-select,.form-input,.form-textarea{width:100%!important;max-width:none!important;margin:0!important}.page-content div[style*="display: grid"],.stats-grid{grid-template-columns:1fr!important;gap:16px!important}.modal div[style*="display: flex"][style*=border-bottom]{overflow-x:auto;white-space:nowrap;padding:0 16px!important;scrollbar-width:none;-ms-overflow-style:none}.modal div[style*="display: flex"][style*=border-bottom]::-webkit-scrollbar{display:none}.modal button[style*="padding: 12px 20px"]{padding:10px 12px!important;flex-shrink:0}.modal-body div[style*="display: flex"]{flex-direction:column!important;gap:16px!important;align-items:stretch!important}.modal-body div[style*=grid-template-columns]{grid-template-columns:1fr!important}.modal-footer{flex-direction:column-reverse;gap:8px;padding:16px!important}.modal-footer .btn{width:100%;margin:0!important}.table-container{margin:0 -16px;padding:0 16px}th,td{padding:12px 8px;font-size:.875rem}}.messages-container{display:flex;gap:20px;height:calc(100vh - 200px)}.messages-sidebar{width:350px;display:flex;flex-direction:column;overflow:hidden}.messages-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.user-list-item{padding:16px;border-bottom:1px solid var(--border-color);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background-color .2s ease}.user-list-item:hover,.user-list-item.selected{background-color:var(--bg-tertiary)}.message-bubble{padding:10px 14px;border-radius:var(--radius-md);max-width:70%;word-break:break-word}.message-bubble.admin{background:var(--primary);color:#fff}.message-bubble.user{background:var(--bg-tertiary);color:inherit}.mobile-back-btn{display:none;background:none;border:none;color:var(--text-primary);font-size:1.2rem;padding:8px;margin-right:8px;cursor:pointer;display:flex;align-items:center;justify-content:center}.mobile-back-btn:hover{background-color:var(--bg-tertiary);border-radius:50%}@media(max-width:768px){.messages-container{height:calc(100vh - 140px);gap:0}.messages-sidebar{width:100%;height:100%;border-right:none}.messages-main{width:100%;position:fixed;inset:64px 0 0;background:var(--bg-primary);transform:translate(100%);transition:transform .3s ease-in-out;z-index:50}.messages-container.chat-active .messages-main{transform:translate(0)}.messages-container.chat-active .messages-sidebar{display:none}.mobile-back-btn{display:inline-flex}.message-input-area{padding:12px}.message-input-area textarea{min-height:40px;height:40px}}