:root{--bg:#0f0f12;--surface:#1a1a1f;--border:#2a2a32;--text:#e8e8ed;--text-muted:#8888a0;--accent:#6c5ce7;--accent-hover:#7d6ef7;--column-new:#2d5a8c;--column-progress:#8c6d2d;--column-done:#2d8c5a;--column-cancelled:#5a2d2d}*{box-sizing:border-box}body{margin:0;font-family:DM Sans,system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--surface)}.logo{font-weight:700;font-size:1.25rem;color:var(--text);text-decoration:none}.nav{display:flex;align-items:center;gap:20px}.nav a{color:var(--text-muted);text-decoration:none;font-size:.95rem}.nav a:hover{color:var(--text)}.user-info{font-size:.9rem;color:var(--text-muted)}.badge{margin-left:8px;padding:2px 8px;border-radius:6px;background:var(--accent);color:white;font-size:.75rem}.btn-logout{padding:8px 14px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-muted);cursor:pointer;font-size:.9rem}.btn-logout:hover{color:var(--text);border-color:var(--text-muted)}.main{padding:20px;max-width:1600px;margin:0 auto}.login-page{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px}.login-page h1{font-size:1.75rem;margin:0}.login-page p{color:var(--text-muted);margin:0}.board{display:flex;gap:16px;overflow-x:auto;padding-bottom:20px;min-height:400px}.column{flex:0 0 280px;background:var(--surface);border-radius:12px;border:1px solid var(--border);display:flex;flex-direction:column;max-height:calc(100vh - 140px)}.column-header{padding:14px 16px;font-weight:600;font-size:.95rem;border-bottom:1px solid var(--border);border-radius:12px 12px 0 0}.column.new .column-header{background:var(--column-new);color:#fff}.column.in_progress .column-header{background:var(--column-progress);color:#fff}.column.done .column-header{background:var(--column-done);color:#fff}.column.cancelled .column-header{background:var(--column-cancelled);color:#fff}.column-cards{flex:1 1;overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:10px}.card{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px 14px;cursor:-webkit-grab;cursor:grab;transition:box-shadow .15s ease}.card:hover{box-shadow:0 4px 12px rgba(0,0,0,.3)}.card:active{cursor:-webkit-grabbing;cursor:grabbing}.card-title{font-weight:600;font-size:.95rem;margin-bottom:4px}.card-desc{font-size:.85rem;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.card-desc,.card-meta{color:var(--text-muted)}.card-meta{font-size:.75rem;margin-top:8px}.card.dragging{opacity:.6}.column.drag-over .column-cards{background:rgba(108,92,231,.08);border-radius:8px}.task-detail{max-width:720px}.task-detail h2{font-size:1.35rem;margin-bottom:8px}.task-detail .meta{color:var(--text-muted);font-size:.9rem;margin-bottom:20px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-size:.9rem;color:var(--text-muted)}.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:1rem}.form-group textarea{min-height:120px;resize:vertical}.btn{padding:10px 18px;border-radius:8px;border:none;font-size:.95rem;cursor:pointer;background:var(--accent);color:white}.btn:hover{background:var(--accent-hover)}.btn-secondary{background:transparent;border:1px solid var(--border);color:var(--text-muted)}.btn-secondary:hover{color:var(--text)}.error-msg{color:#e57373;margin-bottom:12px}.link-back{color:var(--text-muted);text-decoration:none;font-size:.95rem;margin-bottom:16px;display:inline-block}.link-back:hover{color:var(--text)}