:root{--color-primary: #2d2d2d;--color-primary-hover: #404040;--color-primary-bg: #2d2d2d;--color-primary-bg-hover: #404040;--color-text: #2d2d2d;--color-text-secondary: #6b6b6b;--color-text-tertiary: #8b8b8b;--color-text-placeholder: #a0a0a0;--color-text-on-primary: #ffffff;--color-icon-muted: #8b8b8b;--color-bg: #f8f6f3;--color-bg-card: #ffffff;--color-bg-secondary: #f5f3f0;--color-bg-hover: #eeebe7;--color-bg-tertiary: #fafaf9;--color-border: #e8e5e1;--color-border-secondary: #e0dcd7;--color-border-hover: #d0ccc7;--color-success: #22c55e;--color-success-bg: #dcfce7;--color-error: #dc2626;--color-error-bg: #fef2f2;--color-error-border: #fecaca;--color-warning: #f59e0b;--color-warning-bg: #fef3c7;--color-warning-border: #fcd34d;--color-success-border: #86efac;--color-info: #3b82f6;--color-info-bg: #dbeafe;--color-info-border: #93c5fd;--color-accent: #8b5cf6;--color-accent-bg: #ede9fe;--color-accent-border: #c4b5fd;--piano-frame-bg: linear-gradient(180deg, #3d3d3d 0%, #2a2a2a 100%);--piano-key-white-bg: linear-gradient(180deg, #ffffff 0%, #fafafa 70%, #f5f5f5 100%);--piano-key-white-border: #e0e0e0;--piano-key-black-bg: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 60%, #0f0f0f 100%);--piano-key-black-active: #4a4a4a;--part-color-left-hand: #d97706;--part-color-right-hand: #059669;--part-color-voice: #6b7280;--part-color-default: #6b7280;--spacing-xs: 4px;--spacing-sm: 6px;--spacing-md: 8px;--spacing-lg: 10px;--spacing-xl: 12px;--spacing-2xl: 16px;--spacing-3xl: 20px;--spacing-4xl: 24px;--spacing-5xl: 32px;--spacing-6xl: 48px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 10px;--radius-2xl: 12px;--radius-3xl: 16px;--radius-full: 9999px;--font-size-xs: 11px;--font-size-sm: 12px;--font-size-base: 13px;--font-size-md: 14px;--font-size-lg: 15px;--font-size-xl: 16px;--font-size-2xl: 18px;--font-size-3xl: 22px;--font-size-4xl: 28px;--font-size-5xl: 32px;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--shadow-xs: 0 1px 3px rgba(0, 0, 0, .04);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08);--shadow-xl: 0 8px 32px rgba(0, 0, 0, .12);--transition-fast: all .1s ease;--transition-base: all .2s ease;--transition-slow: all .3s ease}:root.dark{--color-primary: #e0e0e0;--color-primary-hover: #ffffff;--color-primary-bg: #e0e0e0;--color-primary-bg-hover: #ffffff;--color-text: #e8e8e8;--color-text-secondary: #a0a0a0;--color-text-tertiary: #787878;--color-text-placeholder: #606060;--color-text-on-primary: #1a1a1a;--color-icon-muted: #a0a0a0;--color-bg: #1a1a1a;--color-bg-card: #2a2a2a;--color-bg-secondary: #333333;--color-bg-hover: #3d3d3d;--color-bg-tertiary: #242424;--color-border: #3a3a3a;--color-border-secondary: #444444;--color-border-hover: #555555;--color-success: #4ade80;--color-success-bg: #14532d;--color-error: #f87171;--color-error-bg: #450a0a;--color-error-border: #7f1d1d;--color-warning: #fbbf24;--color-warning-bg: #422006;--color-warning-border: #a16207;--color-success-border: #166534;--color-info: #60a5fa;--color-info-bg: #1e3a5f;--color-info-border: #3b82f6;--color-accent: #a78bfa;--color-accent-bg: #2e1065;--color-accent-border: #7c3aed;--piano-frame-bg: linear-gradient(180deg, #1a1a1a 0%, #0f0f0f 100%);--piano-key-white-bg: linear-gradient(180deg, #f0f0f0 0%, #e8e8e8 70%, #e0e0e0 100%);--piano-key-white-border: #cccccc;--piano-key-black-bg: linear-gradient(180deg, #1a1a1a 0%, #0a0a0a 60%, #000000 100%);--piano-key-black-active: #3a3a3a;--shadow-xs: 0 1px 3px rgba(0, 0, 0, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .3);--shadow-xl: 0 8px 32px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--color-bg);color:var(--color-text);position:relative;transition:background-color .3s ease,color .3s ease}body:before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(139,115,85,.04) 0%,transparent 50%),radial-gradient(ellipse at 70% 80%,rgba(92,84,112,.03) 0%,transparent 50%);pointer-events:none;z-index:0;transition:opacity .3s ease}:root.dark body:before{opacity:0}#app{height:100%;position:relative;z-index:1}.container{max-width:1400px;margin:0 auto;padding:0 20px;width:100%}.card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-2xl);box-shadow:var(--shadow-xs)}::-webkit-scrollbar{width:var(--spacing-md);height:var(--spacing-md)}::-webkit-scrollbar-track{background:var(--color-bg-hover);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb{background:var(--color-border-hover);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-tertiary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-md);cursor:pointer;border:none;font-weight:var(--font-weight-semibold);transition:var(--transition-base);text-decoration:none}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-sm{padding:var(--spacing-sm) var(--spacing-xl);font-size:var(--font-size-base);border-radius:var(--radius-lg)}.btn-md{padding:var(--spacing-xl) var(--spacing-3xl);font-size:var(--font-size-lg);border-radius:var(--radius-2xl)}.btn-lg{padding:var(--spacing-2xl) var(--spacing-4xl);font-size:var(--font-size-xl);border-radius:var(--radius-2xl)}.btn-primary{background:var(--color-primary-bg);color:var(--color-text-on-primary);box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background:var(--color-primary-bg-hover);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--color-bg-card);color:var(--color-text);border:1px solid var(--color-border-secondary)}.btn-secondary:hover:not(:disabled){background:var(--color-bg-tertiary);border-color:var(--color-border-hover)}.btn-ghost{background:var(--color-bg-secondary);color:var(--color-text-secondary);border:1px solid var(--color-border-secondary)}.btn-ghost:hover:not(:disabled){background:var(--color-bg-hover);color:var(--color-text);border-color:var(--color-border-hover)}.btn-danger{background:var(--color-error-bg);color:var(--color-error);border:1px solid var(--color-error-border)}.btn-danger:hover:not(:disabled){background:#fee2e2;border-color:#fca5a5}.btn-link{background:none;border:none;color:var(--color-text-secondary);padding:0;font-size:var(--font-size-md);font-weight:var(--font-weight-normal)}.btn-link:hover:not(:disabled){color:var(--color-text);transform:none}.btn-outline{background:transparent;color:var(--color-text-secondary);border:1px solid var(--color-border-secondary)}.btn-outline:hover:not(:disabled){background:var(--color-error-bg);border-color:var(--color-error-border);color:var(--color-error)}.btn-icon{padding:var(--spacing-md);border-radius:var(--radius-lg)}.btn-icon.btn-sm{padding:var(--spacing-sm)}.btn-icon.btn-lg{padding:var(--spacing-xl)}.loader{border-radius:50%;border-style:solid;border-color:var(--color-border);border-top-color:var(--color-primary);animation:spin .8s linear infinite}.loader-sm{width:18px;height:18px;border-width:2px}.loader-md{width:24px;height:24px;border-width:3px}.loader-lg{width:44px;height:44px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-2xl);padding:var(--spacing-6xl) var(--spacing-3xl);color:var(--color-text-secondary)}.form-group{display:flex;flex-direction:column;gap:var(--spacing-md)}.form-label{font-size:var(--font-size-md);font-weight:var(--font-weight-medium);color:var(--color-text)}.form-input{background:var(--color-bg-secondary);border:1px solid var(--color-border-secondary);border-radius:var(--radius-2xl);padding:var(--spacing-md) var(--spacing-2xl);font-size:var(--font-size-xl);color:var(--color-text);transition:var(--transition-base)}.form-input:focus{outline:none;border-color:var(--color-primary);background:var(--color-bg-card);box-shadow:0 0 0 3px #2d2d2d1a}.form-input::placeholder{color:var(--color-text-placeholder)}.form-input:disabled{opacity:.6;cursor:not-allowed}.form-error-text{font-size:var(--font-size-sm);color:var(--color-error)}.form-checkbox-group{display:flex;flex-direction:row;align-items:center;gap:var(--spacing-lg)}.form-checkbox{width:18px;height:18px;accent-color:var(--color-primary)}.base-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-3xl);box-shadow:var(--shadow-xs)}.base-card-hoverable{transition:var(--transition-base);cursor:pointer}.base-card-hoverable:hover{transform:translateY(-2px);border-color:var(--color-border-hover);box-shadow:var(--shadow-lg)}.base-card-header{padding:var(--spacing-3xl);border-bottom:1px solid var(--color-border)}.base-card-content{padding:var(--spacing-3xl)}.base-card-footer{padding:var(--spacing-3xl);border-top:1px solid var(--color-border)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:var(--spacing-6xl) var(--spacing-3xl);background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-3xl)}.empty-state-icon{width:64px;height:64px;color:var(--color-text-tertiary);opacity:.5;margin-bottom:var(--spacing-4xl)}.empty-state-icon svg{width:100%;height:100%}.empty-state-text{font-size:var(--font-size-xl);color:var(--color-text-secondary);margin-bottom:var(--spacing-4xl)}.badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-xl);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);border-radius:var(--radius-full);border:1px solid transparent}.badge-default{background:var(--color-bg-secondary);color:var(--color-text-secondary);border-color:var(--color-border-secondary)}.badge-success{background:var(--color-success-bg);color:var(--color-success);border-color:var(--color-success-border)}.badge-warning{background:var(--color-warning-bg);color:var(--color-warning);border-color:var(--color-warning-border)}.badge-error{background:var(--color-error-bg);color:var(--color-error);border-color:var(--color-error-border)}.alert{padding:var(--spacing-xl) var(--spacing-2xl);border-radius:var(--radius-2xl);font-size:var(--font-size-md)}.alert-error{background:var(--color-error-bg);border:1px solid var(--color-error-border);color:var(--color-error)}.alert-success{background:var(--color-success-bg);border:1px solid var(--color-success-border);color:var(--color-success)}.alert-info{background:var(--color-info-bg);border:1px solid var(--color-info-border);color:var(--color-info)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-5xl)}.page-title{font-size:var(--font-size-4xl);font-weight:var(--font-weight-bold);color:var(--color-text)}.page-count{font-size:var(--font-size-md);color:var(--color-text-secondary);background:var(--color-bg-secondary);padding:var(--spacing-sm) var(--spacing-xl);border-radius:var(--radius-full);border:1px solid var(--color-border-secondary)}.section{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-3xl);padding:var(--spacing-4xl)}.section-title{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);color:var(--color-text);margin-bottom:var(--spacing-3xl)}.status-badge{display:inline-block;padding:var(--spacing-xs) var(--spacing-lg);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium)}.status-badge.open{background:var(--color-warning-bg);color:var(--color-warning)}.status-badge.in_progress{background:var(--color-info-bg);color:var(--color-info)}.status-badge.resolved{background:var(--color-success-bg);color:var(--color-success)}.status-badge.closed{background:var(--color-bg-secondary);color:var(--color-text-tertiary)}.avatar{display:flex;align-items:center;justify-content:center;border-radius:var(--radius-lg);background:var(--color-primary);color:var(--color-text-on-primary);font-weight:var(--font-weight-semibold)}.avatar-sm{width:28px;height:28px;font-size:var(--font-size-xs)}.avatar-md{width:32px;height:32px;font-size:var(--font-size-xs)}.avatar-lg{width:36px;height:36px;font-size:var(--font-size-sm)}.avatar-xl{width:48px;height:48px;font-size:var(--font-size-lg);border-radius:var(--radius-xl)}.avatar-muted{background:var(--color-bg-secondary);color:var(--color-text-secondary)}.message{padding:var(--spacing-2xl);background:var(--color-bg);border:1px solid var(--color-border-secondary);border-radius:var(--radius-xl)}.message-admin{background:var(--color-bg-secondary);border-color:var(--color-border);border-left:3px solid var(--color-primary)}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg)}.message-author{font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);color:var(--color-text)}.message-admin .message-author{color:var(--color-primary)}.message-date{font-size:var(--font-size-sm);color:var(--color-text-tertiary)}.message-content{font-size:var(--font-size-md);color:var(--color-text-secondary);line-height:1.6;white-space:pre-wrap}.messages-list{display:flex;flex-direction:column;gap:var(--spacing-2xl)}.reply-form{display:flex;flex-direction:column;gap:var(--spacing-xl);padding-top:var(--spacing-3xl);border-top:1px solid var(--color-border)}.reply-form textarea{padding:var(--spacing-xl) var(--spacing-2xl);border:1px solid var(--color-border-secondary);border-radius:var(--radius-lg);font-size:var(--font-size-md);background:var(--color-bg);color:var(--color-text);resize:vertical;min-height:80px;transition:var(--transition-base)}.reply-form textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2d2d2d1a}:root.dark .reply-form textarea:focus{box-shadow:0 0 0 3px #e0e0e026}.reply-form :deep(.btn){align-self:flex-end}.form-row{display:flex;gap:var(--spacing-3xl)}.form-group-small{flex:0 0 180px}.form-actions{display:flex;justify-content:flex-end;gap:var(--spacing-2xl);margin-top:var(--spacing-md)}.form-actions-left{justify-content:flex-start}.form-actions-center{justify-content:center}.form-group input,.form-group select,.form-group textarea{padding:var(--spacing-xl) var(--spacing-2xl);border:1px solid var(--color-border-secondary);border-radius:var(--radius-lg);font-size:var(--font-size-md);background:var(--color-bg);color:var(--color-text);transition:var(--transition-base)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2d2d2d1a}:root.dark .form-group input:focus,:root.dark .form-group select:focus,:root.dark .form-group textarea:focus{box-shadow:0 0 0 3px #e0e0e026}.form-group textarea{resize:vertical;min-height:100px}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--color-text-placeholder)}.success-message{font-size:var(--font-size-sm);color:var(--color-success)}.error-message{font-size:var(--font-size-sm);color:var(--color-error)}@media(max-width:640px){.form-row{flex-direction:column}.form-group-small{flex:1}}