:root{--bg-page: #0B0B0B;--bg-surface: #121212;--bg-elevated: #1A1A1A;--bg-subtle: #181818;--bg-hover: #222222;--bg-active: #2A2A2A;--text-primary: #EDEDED;--text-secondary: #8A8A8A;--text-tertiary: #5C5C5C;--accent: #CCFF00;--accent-hover: #B8E600;--accent-muted: rgba(204, 255, 0, .12);--border: #2A2A2A;--border-light: #333333;--danger: #FF4444;--warning: #FFB800;--info: #4DABF7;--green: #5cb85c;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--sidebar-width: 240px;--header-height: 0px}*,*:before,*:after{box-sizing:border-box}html{font-size:16px}body{margin:0;padding:0;background:var(--bg-page);color:var(--text-primary);font-family:Inter,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 14px;font-size:.85rem;font-weight:500;border:none;border-radius:var(--radius-sm);transition:all .12s ease;line-height:1}.btn-primary{background:var(--accent);color:#0b0b0b}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-light)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-icon{padding:6px;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);border:none;line-height:1}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.input{width:100%;padding:9px 12px;font-size:.85rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);outline:none;transition:border-color .12s ease}.input:focus{border-color:var(--accent)}.input::placeholder{color:var(--text-tertiary)}.textarea{width:100%;padding:9px 12px;font-size:.85rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);outline:none;resize:vertical;font-family:inherit;transition:border-color .12s ease}.textarea:focus{border-color:var(--accent)}.textarea::placeholder{color:var(--text-tertiary)}.select{width:100%;padding:9px 32px 9px 12px;font-size:.85rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);outline:none;cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%238A8A8A' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}.select:focus{border-color:var(--accent)}.select option{background:var(--bg-surface);color:var(--text-primary)}.page-header{margin-bottom:2rem}.page-header h1{font-size:1.5rem;font-weight:700;margin:0 0 4px;letter-spacing:-.02em}.page-header .subtitle{color:var(--text-secondary);margin:0;font-size:.85rem}.page-header-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.page-header-row h1{font-size:1.5rem;font-weight:700;margin:0;letter-spacing:-.02em}.diff-badge{display:inline-block;font-size:.72rem;font-weight:600;padding:2px 8px;border-radius:4px;text-transform:uppercase;letter-spacing:.03em}.diff-easy{background:#4caf501f;color:#5cb85c}.diff-medium{background:#ffb8001f;color:#f0ad4e}.diff-hard{background:#ff44441f;color:#f44343}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.status-dot.done{background:#5cb85c}.status-dot.revision{background:#f0ad4e}.status-dot.todo{background:var(--text-tertiary)}.overlay{position:fixed;inset:0;background:#0009;z-index:1000;display:flex;align-items:center;justify-content:center}.dialog{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);width:460px;box-shadow:0 8px 32px #0000004d}.dialog-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--border)}.dialog-header h3{margin:0;font-size:.9rem;font-weight:600}.dialog-close{background:none;border:none;cursor:pointer;color:var(--text-tertiary);padding:4px;border-radius:4px;display:inline-flex;align-items:center}.dialog-close:hover{background:var(--bg-hover);color:var(--text-primary)}.dialog-body{padding:1.25rem;display:flex;flex-direction:column;gap:1rem}.dialog-footer{display:flex;justify-content:flex-end;gap:8px;padding:1rem 1.25rem;border-top:1px solid var(--border)}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:.72rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em}.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md)}.tabs{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:1.5rem}.tab{padding:10px 16px;font-size:.85rem;font-weight:500;color:var(--text-secondary);background:transparent;border:none;border-bottom:2px solid transparent;cursor:pointer;transition:all .12s ease}.tab:hover{color:var(--text-primary)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}